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WO2019183964A1 - Appareillage de commutation isolé par air et système électrique le comprenant - Google Patents

Appareillage de commutation isolé par air et système électrique le comprenant Download PDF

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Publication number
WO2019183964A1
WO2019183964A1 PCT/CN2018/081455 CN2018081455W WO2019183964A1 WO 2019183964 A1 WO2019183964 A1 WO 2019183964A1 CN 2018081455 W CN2018081455 W CN 2018081455W WO 2019183964 A1 WO2019183964 A1 WO 2019183964A1
Authority
WO
WIPO (PCT)
Prior art keywords
busbars
insulated switchgear
air insulated
compartment
circuit breaker
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/081455
Other languages
English (en)
Inventor
Xiaobo Huang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Schweiz AG
Original Assignee
ABB Schweiz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to PCT/CN2018/081455 priority Critical patent/WO2019183964A1/fr
Publication of WO2019183964A1 publication Critical patent/WO2019183964A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
    • H02B1/308—Mounting of cabinets together
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/02—Details
    • H02B11/06—Means for duplicate bus-bar selection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/28—Earthing arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/005—Electrical connection between switchgear cells

Definitions

  • the non-limiting and exemplary embodiments of the present disclosure generally relate to the field of electrical devices, and more particularly relate to an air insulated switchgear and an electrical system including the air insulated switchgear.
  • a switchgear which is usually also called as switch cabinet, is an electric device which is adapted to switch on or off, control and protect electrical equipment during power generation, transmission, distribution, and power conversion.
  • the switchgear can be classified in many manners. For example, it could be classified, in terms of functionalities, into incoming panel, disconnection panel, feeder panel, bustie panel, busriser panel, metering panel and potential transformer panel. In addition, according to different voltage levels, it could also be categorized into a low voltage switchgear, a high voltage switchgear and a medium voltage switchgear.
  • the switchgear In air insulated switchgear, there are usually accommodated electric components such as circuit breakers, disconnectors, load switches, operating mechanisms, transformers, various protection devices and so on.
  • the switchgear can be divided into different compartments such as a busbar compartment, a circuit breaker compartment, a cable compartment, and a low voltage compartment.
  • it may also provide a pressure relief passage on the top of the busbar compartment, if required, so as to release arcing air pressure in an even of arc generation.
  • the air insulated switchgear has a big size and, in many practice applications, it requires more than one air insulated switchgear, which means a large space occupation and a high cost. In addition, low line loss, and easy maintenance are also constant demands of the air insulated switchgear. Thus, there is a need in the art to improve the design of air insulated switchgear.
  • an air insulated switchgear may include a busbar compartment, adapted to accommodate at least two main busbars and at least two branch busbars for at least two phases.
  • the at least two main busbars are arranged in a front to back direction of the air insulated switchgear and each of the at least two branch busbars is connected to a corresponding one of the at least two main busbars substantially perpendicularly.
  • Such arrangement of the main busbars could provide enough inter-phase distance so that a branch busbar could be connected to a corresponding main busbar substantially perpendicularly without bending.
  • it is possible to reduce the length of a main loop in the air insulated switchgear which means a compact design, a lower line loss and also a low cost.
  • the at least two main busbars can be arranged substantially in the same level. Such a design could make the design more compact.
  • the air insulated switchgear may include a circuit breaker and at least two current transformers for the at least two phases, wherein the circuit breaker may be adapted to contact with the at least two branch busbars by corresponding upper contacts and contact directly with upper terminals of the at least two current transformers by corresponding lower contacts.
  • the lower contacts could be connected with the upper terminals of the current transformers without additional connection busbars and thus, fewer joints are used, which means both a lower line loss and lower cost.
  • each of the at least two branch busbars can be in line with an upper terminal of a corresponding one of the at least two current transformers. This design could make the length of the main loop in the air insulated switchgear as short as possible.
  • each of the at least two branch busbars can be in line with a lower terminal of the corresponding one of the at least two current transformers. This design could further make the length of the main loop in the air insulated switchgear as short as possible.
  • a lower terminal of each of the at least two current transformers may be configured to be directly connected to a cable in a cable compartment.
  • the lower terminals of the current transformers can function as the lower branch busbars in the cabinet compartment and thus fewer joints are used, which means both a lower line loss and lower cost.
  • the air insulated switchgear may further include at least two extension cable connection busbars each connected to and transversely extending from a lower terminal of a corresponding one of the at least two current transformers, wherein each of the at least two extension cable connection busbars may be adapted to be connected with a cable in the cable compartment.
  • This extension cable connection busbars could provide more cable connection terminals for connecting the cables.
  • the air insulated switchgear may further include a circuit breaker compartment adapted to accommodate a circuit breaker and a cable compartment adapted to accommodate cables, wherein the busbar compartment, the circuit breaker compartment, and the cable compartment are arranged on top of each other in the vertical direction.
  • a circuit breaker compartment adapted to accommodate a circuit breaker and a cable compartment adapted to accommodate cables, wherein the busbar compartment, the circuit breaker compartment, and the cable compartment are arranged on top of each other in the vertical direction.
  • the air insulated switchgear may further include a pressure relief passage adapted to release arcing pressure in an event of arc generation, wherein the pressure relief passage may be located on the top of the cable compartment and adjacent to both the busbar compartment and the circuit breaker compartment.
  • a pressure relief passage adapted to release arcing pressure in an event of arc generation
  • the pressure relief passage may be located on the top of the cable compartment and adjacent to both the busbar compartment and the circuit breaker compartment.
  • the air insulated switchgear may further include at least two potential transformers for the at least two phases, wherein the at least two potential transformers are connected to the at least two branch busbars for measuring the voltage of the main busbars.
  • the proposed solution could be used in a metering cabinet like potential transformer cabinet.
  • the air insulated switchgear may further comprise a circuit breaker and at least two current transformers for the at least two phases, wherein the at least two current transformers may be located between the air insulated switchgear and another air insulated switchgear, and wherein the circuit breaker may be adapted to contact with the at least two branch busbars by corresponding upper contacts and contact directly with first terminals of the at least two current transformers by corresponding lower contacts.
  • each of the at least two branch busbars can be perpendicular to a first terminal of a corresponding one of the at least two current transformer.
  • the air insulated switchgear may further comprise a switch for the at least two phases, wherein the switch has one end adapted to be connected with the at least two branch busbars and has the other end adapted to be connected with second terminals of at least two current transforms for the at least two phases.
  • the least two main busbars are arranged face to face with each other, and the least two branch busbars are arranged face to face with each other, and wherein the at least two phases are three phases, .
  • an electrical system comprising at least one air insulated switchgear according to the first aspect.
  • Fig. 1 schematically illustrates an example structure of an air insulated switchgear in the prior art
  • Fig. 2A schematically illustrates a side view of an air insulated switchgear with the side panel removed according to an embodiment of the present disclosure
  • Fig. 2B schematically illustrates a sectional view of the air insulated switchgear taken along line C-C according to an embodiment of the present disclosure
  • Fig. 2C illustrates comparison of interphase distance between the existing arrangement in the prior art and the proposed arrangement according to an embodiment of the present disclosure.
  • Figs. 3A to 3C schematically illustrate a partial enlarged view of the current transformer according to an embodiment of the present disclosure.
  • Fig. 4 schematically illustrates a side view of the air insulated switchgear as a metering cabinet according to an embodiment of the present disclosure
  • Fig. 5 schematically illustrates a side view of the air insulated switchgear as a busbar sectionalizer cabinet and a busbar riser cabinet according to an embodiment of the present disclosure
  • Fig. 6 schematically illustrates an example system including at least one air insulated switchgear according to an embodiment of the present disclosure.
  • references in the specification to “one embodiment, ” “an embodiment, ” “an example embodiment, ” etc. indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
  • first and second etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments.
  • the term “and/or” includes any and all combinations of one or more of the associated listed terms.
  • the air insulated switchgear has a big size and in many practice applications, it requires more than one switchgear.
  • various types of air insulated switchgear available, but they are still required to be further improved, especially in terms of miniaturization, cost, line loss, heat dissipation, expedience, etc.
  • Fig 1 illustrates an example switchgear in the art.
  • the switchgear 100 defines an internal space by its housing including a front plate, a rear plate, a top plate, a bottom plate, and two side plates.
  • the defined internal space is further divided, by means of internal metal partition plate, into four compartments including a busbar compartment 110, a circuit breaker compartment 120, a cable compartment 130, and a low voltage compartment 140.
  • a pressure relief passage 150 on the top of the busbar compartment 110.
  • these compartments are accommodated components such as three main busbars 112a, 112b, 112c, three branch busbars 114a, 114b, 114c in the busbar compartment, the circuit breaker 122, the upper branch busbar 132 in the cable compartment, the lower branch busbar 134 in the cable compartment, a current transformer 136 as well as secondary equipment required for protection and control functions.
  • components such as three main busbars 112a, 112b, 112c, three branch busbars 114a, 114b, 114c in the busbar compartment, the circuit breaker 122, the upper branch busbar 132 in the cable compartment, the lower branch busbar 134 in the cable compartment, a current transformer 136 as well as secondary equipment required for protection and control functions.
  • the busbar compartment 110 is used to accommodate the main busbars l12a, l12b, 112c entering from outside as well as the branch busbars l14a, l14b, 114c for three phases.
  • the busbars could be provided with full insulation (including joints) to ensure that the busbar system is a fault free zone as far as possible.
  • the circuit breaker compartment 120 is adapted to accommodate the circuit breaker 122, which could be for example a vacuum or SF6 circuit breaker mounted on a switch-truck.
  • the circuit breaker 122 includes the upper contact arm 124a and the upper contact 126a, and the lower contact 126b and the lower contact arm 124b for each phase.
  • the upper contact 126a could be contacted with a corresponding branch busbar in the busbar compartment 110; the lower contact 126b could be contacted with the corresponding branch busbar 132 in the cable compartment 130.
  • the upper contact arm 124a and the upper contact 126a may be housed in the upper contact spout 128a, and the lower contact 126b and the lower contact arm 124b may be housed in the lower contact spout 128b.
  • the upper contact spout 128a and the lower contact spout 128b provide an electrical insulation between the upper contact arms and the metal partition plates and between the upper and lower contacts and the metal partition plate
  • the circuit breaker could be movable on the switch-truck between a service position and a test/disconnection position, and both of the service position and the test/disconnection position are all accommodated entirely within the switchgear 100.
  • a shutter system 129 may comprises a plurality of shutter and it is further provided to cover the disconnected contacts when the circuit breaker is in the disconnection position, to provide true visual disconnection with earthing separation.
  • the shutter system 129 could be opened when the breaker circuit operates at the service position and could be opened when the breaker circuit is pulled out to the disconnection position. In this way, it could shield the operator from the high electric field when pulling out of circuit breaker with door open.
  • the upper branch busbars 132 in the cable compartment could be contacted with corresponding lower contacts 126b on one end and connected to corresponding input terminals of the current transformers 136 on the other end.
  • Corresponding output terminals of the current transformer 136 can be further connected to the lower branch branches 134 in the cable compartment, which can only be connected with limited number of the cables.
  • the cable compartment 130 could provide a space for contacting multiple cable connections.
  • the low voltage compartment 140 provides a space to accommodate all secondary equipment required for protection and control functions. External control cables are terminated in the low voltage compartment 140 after entering through generous metal enclosed ducts.
  • the pressure relief passage 150 is further arranged on top of the busbar compartment 110 to release an arcing air pressure in an even of arc generation.
  • a pressure relief plate In each of high voltage compartments 110, 120, 130, there is provided a pressure relief plate. When an arc is generated, the resulting air pressure will push and open the pressure relief plate so that the pressured air can be released into the pressure relief passage.
  • the three main busbars 112a, 112b, 112c are arranged one by one in the elevation direction.
  • the main busbars are arranged in a top to down direction of the switchgear.
  • the interphase insulation distance is limited.
  • the branch busbars 114, 114b, 114c are first bent and then extended towards to the upper contact spout 128a.
  • the upper contact spout 128a and the lower contact spout 128b are used to support the fixed contacts and provide required an electrical insulation between the upper contact arms and the metal partition plates and between the upper and lower contacts and the metal partition plate.
  • the circuit breaker 122 usually has tulip contacts and uses fixed contacts to connect with the branch busbars 114a, 114b, 114c. Shutters in the shutter system 129 are near to the contacts 126a, 126b and the contact spout 128a, 128b when the circuit is located at the test/disconnection position and meanwhile they are near to the lower arm 126b when they are located at the service operation. Thus, it requires insulation treatments on the shutters.
  • the upper and lower contact arms 124a, 124b are designed long enough to provide sufficient length to connect with fixed contacts which are surrounded by spouts and there is a certain distance between the end of contact and surface of opening of spout
  • the branch busbars 134 in the cable compartment are arranged side by side, and thus auxiliary connection busbars 135 are used to provide more connection terminals which could be further connected with a plurality of cables.
  • the main loop conductor in the cable compartment comprises the following parts: the upper branch busbar 132 in the cable compartment, the current transformer 136, and the lower branch busbar 134 in the cable compartment and possible extension cable connection busbar.
  • the design of the example existing switchgear has some disadvantages, such as line loss caused by the main loop design, cost issues due to the main loop design, the insulation design, and the material adopted. In addition, it is also not easy to install and maintain due to the design of the pressure relief passage. Moreover, its size is big and not satisfactory yet.
  • the air insulated switchgear as proposed herein will be described with reference to Figs. 2 to 6.
  • the air insulated switchgears given herein are only examples for illustrative purposes and the present disclosure is not limited thereto.
  • the skilled in the art could modify the switchgear without departing the spirit of the present disclosure.
  • the medium-voltage (MV) air insulated switchgear is taken as an example to describe the new air insulated switchgear as proposed in the present disclosure.
  • MV medium-voltage
  • Three phase applications are taken as examples to describe the air insulated switchgear herein, but the present disclosure is not limited thereto.
  • the present disclosure can be applied to application for less or more phases.
  • Figs. 2A and 2B respectively illustrate a side view of the air insulated switchgear with the side panel removed and a sectional view taken from line C-C according to an embodiment of the present disclosure.
  • the example switchgear 200 is an air insulated switchgear for MV applications.
  • the switchgear 200 defines an internal space by a housing including a front plate, a rear plate, a top plate, a bottom plate, and two side plates.
  • the defined internal space is further divided, by means of inner metal partition plate, into four compartments including a busbar compartment 210, a circuit breaker compartment 220, a cable compartment 230, and a low voltage compartment 240.
  • the busbar compartment is stacked over the circuit breaker compartment 220, and the circuit breaker compartment 220 is stacked over the cable compartment 230.
  • the three compartments 210, 220 and 230 are arranged in a top to bottom direction one by one.
  • the busbar compartment 210, a circuit breaker compartment 220, and a cable compartment 230 are arranged on top of each other in the vertical direction.
  • Such compartment design can achieve a modularization design and manufacture, which makes both further design and manufacture easily.
  • a pressure relief passage 250 on the top of the cable compartment 230 immediately adjacent to both the busbar compartment 210 and the circuit breaker compartment 220 is arranged at the back side.
  • the pressure relief passage 250 is provided at the top rear part of the switchgear although it may also be located at other parts like left rear or right rear part of the switchgear.
  • the pressure relief passage 250 is not on the top of the busbar compartment 210 but at the top rear part. In such way, it will reduce the height of the switchgear. Therefore, The pressure relief passage 250 can be assembled onto the switchgear during manufacturing without installing it in the field.
  • the pressure relief compartment is located by a side of the busbars compartment and the circuit breaker compartment, , it does will not cover the busbar compartment anymore and thus it will be an easy job to check the busbar compartment.
  • the busbar compartment 210 is used to accommodate at least main busbars and at least two branch busbars for at least two phases.
  • Fig. 2A and 2B there are illustrated three main busbars 212a, 212b, 212c as well as three branch busbars 214a, 214b, 214c for three phases.
  • the main busbars 212a, 212b, 212b enter from outside through three wall bushings 211 respectively.
  • the main busbars 212a, 212b, 212c are arranged in a front to back direction of the switchgear and each of the branch busbars 214a, 214b, 214c is connected to a corresponding one of the main busbars 212a, 212b, 212c substantially perpendicularly.
  • the three main busbars could enter, as a whole, the switchgear in the horizontal direction.
  • the main busbars of the existing switchgear is arranged in a top to down direction or in the vertical direction.
  • the main busbars of the switchgear as proposed herein are arranged in a front to back direction of the switchgear.
  • the main busbars could be arranged face to face with each other, which could provide enough interphase insulation distance and insulation margins, and thus there is no need for bending of the branch busbars to ensure the interphase insulation distance and no need for further insulation treatment.
  • Fig. 2C illustrates comparison of interphase distance between the existing arrangement in the prior art and the proposed arrangement according to an embodiment of the present disclosure.
  • both the main busbars and the branch busbars are arranged face to face with each other, while in the existing arrangement, the main busbars and the branch busbars are arranged side by side.
  • the proposed arrangement herein could achieve a larger interphase distance as illustrated in a case the same distance between centers.
  • each of the branch busbars 214a, 214b, 214c could be connected to a corresponding one of the main busbars 212a, 212b, 212c substantially perpendicularly without any bending.
  • the upper terminals and lower terminals of the current transformer can be arranged in a similar way.
  • the three main busbars can all be arranged near the top of the switchgear and thus they are easy to be maintained. This may also provide a larger space therebetween, which could facilitate the heat dissipation. Moreover, by means of such arrangement of the main busbars, the three main busbars could dissipate generated heat evenly.
  • the main busbars 212a, 212b, 212c can be arranged substantially in the same level to save the occupation space as far as possible. That is to say, the main busbars 212a, 212b, 212c can be arranged substantially in the same horizontal level.
  • the branch busbars 212a, 212b, 212c are arranged in the front to back direction accordingly, which also facilitate the heat dissipation.
  • the branch busbars 212a, 212b, 212c can be cast as integral parts of respective isolation bushings 216 between the busbar compartment 210 and the circuit breaker compartment 220.
  • upper terminals of the isolation bushing can function as the upper branch busbars for the busbar compartment and lower terminals of the isolation bushing can function as the lower branch busbars and fixed contacts for the circuit breaker.
  • the upper terminals of the isolation bushing can be connected to the main busbars and the lower terminals of the isolation bushing can extend up to the upper contact of the circuit breaker.
  • the circuit breaker compartment 220 is located under the busbar compartment 210.
  • the circuit breaker compartment 220 is adapted to accommodate the circuit breaker 222, which could be for example a vacuum or SF6 circuit breaker mounted on a switch-truck.
  • the circuit breaker 222 includes three upper contact arms 224a and three upper movable contacts 226a and three lower movable contacts 226b and three lower contact arms 224b.
  • the upper movable contacts 226a can use duckbill shaped contacts and thus could be connected with the lower terminals of the isolation bushings 216 without addition fixed contacts.
  • each of the branch busbars 214a, 214b, 214c may be in line with an upper terminal of the corresponding one of the three current transformers 236.
  • each of the branch busbars 214a, 214b, 214c is in line with a lower terminal of the corresponding one of the three current transformers 236.
  • the lower contacts 226b can also use duckbill shaped contacts and thus could be directly connected with the upper terminals 232 of the current transformer 236.
  • the shutters 228 can be driven by movement of the circuit breaker on the switch-truck. Particularly, when the circuit breaker is pushed from the outside of the switchgear to the test/disconnection position A (as illustrated in Fig. 2B) , the shutters are driven to open, while the circuit breaker is pulled from the test/disconnection A to outside of the switchgear, the shutters are closed by the acting force of a reset spring. In such way, it could shield the operator from high electric field when the circuit breaker is pulled out to the outside of the switchgear. In addition, the shutters 229 are far away from the high voltage area and thus there is no any additional insulation requirement.
  • the shutters While in the existing switchgear, the shutters are near to the lower contact arm when the circuit breaker is operating, and they are near to the fixed contact when they are at the test/disconnection position. Thus it requires insulation for the shutter is necessary. Therefore, compared with the existing design, the shutter of the present disclosure could eliminate the requirement of insulation and thus could reduce the cost.
  • the cable compartment 230 is located under the circuit breaker compartment 220 in which can be accommodated cables, earthing switch, surge arrester, etc.
  • the upper branch busbar 232 could be contacted with the lower contact 226b of the circuit breaker 222 and the lower branch busbar 234 in the cable compartment could be connected to the cables.
  • the cable compartment 230 could provide a space for contacting multiple cable connections.
  • the current transformers 236 is no located entirely within the cable compartment 230 but located between the circuit breaker compartment 220 and the cable compartment 230, and upper and lower terminal 232, 234 of the current transformers 236 could function as the upper and lower branch busbars in the cable compartment of the existing switchgear themselves, without additional upper and lower branch busbars provided in the cable compartment.
  • Fig. 3 reference will made to describe the current transformer and the branch busbars in the cable compartment 230.
  • Fig. 3 schematically illustrates a partial enlarged view of the current transformer according to an embodiment of the present disclosure.
  • the current transformers 236 are located between the circuit breaker compartment 220 and the cable compartment 230.
  • upper terminals 232 of the current transformers 236 are located within the circuit breaker compartment and only their lower terminals 234 are located within the cable compartment.
  • the upper terminals 232 of the current transformer 236 could directly connected to the lower contacts 226b which are duckbill shaped contact, and thus unlike the existing switchgear, no additional fixed contacts and upper branch busbar in the cable compartment are used.
  • the lower terminals 234 of the current transformers 236 can be used as cable connection terminals and be directly connected with cables.
  • the lower terminals are arranged in a vertical direction, which will facilitate the heat dissipation as well.
  • each extension cable connection busbar 238 can be connected to and transversely extending from the lower terminal 234 of a corresponding one of the current transformers 236. That is to say, the lower terminals of the current transformers extends in a vertical direction, while the extension cable connection busbar 238 can be extended in horizontal direction.
  • the extension cable connection busbars can also be provided face to face with each other, thus enough spaces are provided and in turn each extension cable connection busbar can be connected with more cables in the cable compartment 230 without any subsidiary connection busbar.
  • the low voltage compartment 240 is located on the circuit breaker compartment 220 in front of the busbar compartment 210.
  • the low voltage compartment provides a space to accommodate all secondary equipment required for protection and control functions. External control cables are terminated in the low voltage compartment 240 after entering through generous metal enclosed ducts.
  • the pressure relief passage 250 is adapted to release an arcing air pressure in an even of an arc generation.
  • a pressure relief plate at position which could communicate with the pressure relief passage 250. When an arc is generated, the resulting air pressure pushes and opens the pressure relief plate so that the pressured air is released into the pressure relief passage.
  • a main loop conductor may include the main busbar, the isolation bushing, the circuit breaker, the current transformer and extension branch busbar (if required) and the main loop conductor has a shorter length than that of the existing switchgear.
  • the shorten length of the main loop conductor means a lower cost, a lower line loss and a fewer heat generation.
  • Fig. 4 schematically illustrates a side view of another switchgear as metering cabinet according to an embodiment of the present disclosure.
  • the metering cabinet is illustrated as a potential transformer cabinet which is adapted to measure the voltage of the main busbars.
  • the metering cabinet 400 has a busbar compartment 410 for accommodating three main busbars 412 for three phases, and a metering compartment 460 for accommodating three potential transformers 466 for the three phases.
  • the main busbars 412 are arranged in a front to back direction.
  • the interphase insulation distance is enough and there is no need for bending of the branch busbars to ensure the interphase insulation distance.
  • each of the branch busbars 414 could be connected to a corresponding one of the main busbars 412 substantially perpendicularly without any bending.
  • the three main busbars can all be located near the top of the switchgear and thus easy to be maintained, and it may also provide a larger space there among, which could facilitate the heat dissipation.
  • the three main busbars could dissipate generated heat evenly.
  • the main busbars 412 can be arranged substantially in the same horizontal level to save the occupation space as far as possible.
  • each of the branch busbars 414 are arranged in the front to back direction accordingly, which also facilitate the heat dissipation.
  • each of the branch busbars 414 can be cast as an integral part of a corresponding one of isolation bushings 416 between the busbar compartment 410 and the circuit breaker compartment 420.
  • the upper and lower terminals of the isolation bushings 416 can function as the upper and lower branches for the busbar compartment.
  • the upper terminals of the isolation bushings 416 can be directly connected to the main busbars and lower terminals of the isolation bushings 416 can be connected with an arrester 462 and a transform branch busbar which is further connected to the potential transformer 466 for voltage measurement.
  • an earthing switch 463 In the metering cabinet, there is further provided an earthing switch 463.
  • Fig. 5 schematically illustrates a side view of the switchgear as busbar sectionalizer cabinet 500’ and busbar riser cabinet 500” according to an embodiment of the present disclosure.
  • the busbar sectionalizer cabinet 500’ and busbar riser cabinet 500” could be used together to provide the current measurement of the main busbars.
  • the busbar sectionalizer cabinet 500’ is adapted to measure currents of the main busbars and the busbar riser cabinet is adapted to raise the busbar from a lower level to a regular higher level.
  • the busbar sectionalizer cabinet 500’ includes a busbar compartment 510’, a circuit breaker compartment 520’ and an empty compartment 530’, while the busbar riser cabinet is not further divided and the whole cabinet is adapted to accommodate the busbars, which can be considered as a busbar compartment.
  • the busbar compartment 510’ is adapted for accommodating three main busbars 512’ for three phases
  • the circuit breaker compartment 520’ is adapted for accommodating the circuit breaker for the three phases. Different from the arrangement of the main busbars in a top to down direction, the main busbars 512’ are arranged in a front to back direction.
  • each of the branch busbars 514’ could be connected to a corresponding one of the main busbars 512’ substantially perpendicularly without any bending.
  • the three main busbars can all be located near the top of the switchgear and thus easy to be maintained, and it may also provide a larger space there among, which could facilitate the heat dissipation.
  • the main busbars 512’ can be arranged substantially in the same horizontal level to save the occupation space as far as possible.
  • branch busbars 514’ can be arranged from in the front to back direction of the switchgear accordingly, which also facilitate the heat dissipation.
  • the branch busbars 514’ can be cast as an integral part of the isolation bushing 516’ between the busbar compartment 510’ and the circuit breaker compartment 520’.
  • the upper and lower terminals of the isolation bushings 516’ can function as the upper and lower branches for the busbar compartment.
  • the upper terminals of the isolation bushings 516’ can be directly connected to the main busbars and lower terminals of the isolation bushings 516’ can be connected to the upper contacts of the circuit breaker 522’ whose lower contacts are further connected to the current transformer 536 for current measurement.
  • the current transformer 536 is not located between the circuit breaker compartment 520’ and the empty compartment 530’ but located between the circuit breaker compartment 520’ and the busbar riser cabinet 500”.
  • the circuit breaker 522’ can contact with the at least two branch busbars 514’ by corresponding upper contacts and contact directly with first terminals 531 of the at least two current transformers 536 by corresponding lower contacts.
  • each of the three branch busbars 514’ is not in line with but perpendicular to first terminal 531 of a corresponding one of the at least two current transformers 536.
  • the main busbars 512 are also arranged in a front to back direction of the switchgear.
  • the interphase insulation distance is enough and there is no need for bending of the branch busbars to ensure the interphase insulation distance.
  • each of the branch busbars 514” could be connected to a corresponding one of the main busbars 512” substantially perpendicularly without any bending.
  • the three main busbars 512” can all be located near the top of the switchgear and thus easy to be maintained, and it may also provide a larger space there among, which could facilitate the heat dissipation.
  • the three main busbars could dissipate generated heat evenly.
  • the at least two main busbars 512” can be arranged substantially in the same horizontal level to save the occupation space as far as possible.
  • switch 562 for the three phases, the switch 562” has three blades for three phase, and it has one ends connected to branch busbars 514” and the other ends connected to the second terminals 533 of the current transformers 536.
  • Fig. 6 schematically illustrates an electrical system including at least one air insulated switchgear according to an embodiment of the present disclosure. This is an example arrangement of a typical substation. However, it shall be understood that the switchgear as proposed herein may also form a different system from the illustrated substation.
  • the system comprises a plurality of standard switchgear 100, two metering cabinets 400, a busbar sectionalizer cabinet 500’ and a busbar riser cabinet 500”. All the cabinets are arranged side by side and form the substation.
  • system 600 is only given for illustrative purposes and the system could include more switchgears or less switchgear than those illustrated and the arrangement of the switchgears can be different too.
  • metering cabinet 400 the busbar riser cabinet 500”, the busbar sectionalizer cabinet 500’ and the electrical system 600 are described in brief with reference to Fig. 4 to 6 due to they have similar design to the switchgear as illustrated in Figs. 2 to 3B.
  • Fig. 4 to 6 the busbar riser cabinet 500
  • the busbar sectionalizer cabinet 500 the electrical system 600
  • branch busbars 214a, 214b, 214c may not strictly in line with the upper terminals of the at least two current transformers (236) .
  • the branch busbars (514’) might not be strictly perpendicular to first terminals of the at least two current transformers (536) , either.
  • such differences does not depart from the spirit of the present application and thus still fall within the scope of the present disclosure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

L'invention concerne un appareillage de commutation isolé par air (200, 400, 500', 500") et un système électrique (600) comprenant l'appareillage de commutation isolé par air (200, 400, 500', 500"). L'appareillage de commutation isolé par air (200, 400, 500', 500") comprend un compartiment de barre omnibus (210, 410, 510', 510"), conçu pour recevoir au moins deux barres omnibus principales (212a, 212b, 212c, 412, 512', 512") et au moins deux barres omnibus de dérivation (214a, 214b, 214c, 414, 514', 514") d'au moins deux phases, lesdites deux barres omnibus principales (212a, 212b, 212c, 412, 512', 512") étant disposées dans une direction avant-arrière de l'appareillage de commutation isolé par air (200, 400, 500', 500") et chacune desdites deux barres omnibus de dérivation (214a, 214b, 214c, 414, 514', 514") étant connectée sensiblement perpendiculairement à une barre omnibus correspondante des deux barres omnibus principales (212a, 212b, 212c, 412, 512', 512"). L'agencement selon l'invention permet d'obtenir un appareillage de commutation compact affichant une perte de ligne atténuée à un faible coût.
PCT/CN2018/081455 2018-03-30 2018-03-30 Appareillage de commutation isolé par air et système électrique le comprenant Ceased WO2019183964A1 (fr)

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PCT/CN2018/081455 WO2019183964A1 (fr) 2018-03-30 2018-03-30 Appareillage de commutation isolé par air et système électrique le comprenant

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PCT/CN2018/081455 WO2019183964A1 (fr) 2018-03-30 2018-03-30 Appareillage de commutation isolé par air et système électrique le comprenant

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111061310A (zh) * 2019-12-07 2020-04-24 国网辽宁省电力有限公司电力科学研究院 正压型开关柜压力监控与自动控制系统
WO2022241656A1 (fr) * 2021-05-18 2022-11-24 Abb Schweiz Ag Appareillage de commutation
CN118376862A (zh) * 2024-06-20 2024-07-23 国网山东省电力公司日照供电公司 变电站压板监测装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5581439A (en) * 1994-07-05 1996-12-03 Hitachi, Ltd. Gas insulated switchgear
US20030141281A1 (en) * 2002-01-31 2003-07-31 Mamoru Okabe Gas-insulated switchgear
CN201230161Y (zh) * 2008-06-27 2009-04-29 石家庄科林电气设备有限公司 中压金属封闭开关设备
CN201490613U (zh) * 2009-06-03 2010-05-26 Abb技术有限公司 两相共箱的铁路开关柜
CN105938996A (zh) * 2016-06-29 2016-09-14 上海纳杰电气成套有限公司 一种高压小型化空气绝缘开关柜母线室结构

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5581439A (en) * 1994-07-05 1996-12-03 Hitachi, Ltd. Gas insulated switchgear
US20030141281A1 (en) * 2002-01-31 2003-07-31 Mamoru Okabe Gas-insulated switchgear
CN201230161Y (zh) * 2008-06-27 2009-04-29 石家庄科林电气设备有限公司 中压金属封闭开关设备
CN201490613U (zh) * 2009-06-03 2010-05-26 Abb技术有限公司 两相共箱的铁路开关柜
CN105938996A (zh) * 2016-06-29 2016-09-14 上海纳杰电气成套有限公司 一种高压小型化空气绝缘开关柜母线室结构

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111061310A (zh) * 2019-12-07 2020-04-24 国网辽宁省电力有限公司电力科学研究院 正压型开关柜压力监控与自动控制系统
WO2022241656A1 (fr) * 2021-05-18 2022-11-24 Abb Schweiz Ag Appareillage de commutation
CN118376862A (zh) * 2024-06-20 2024-07-23 国网山东省电力公司日照供电公司 变电站压板监测装置

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