CN106058819B - Voltage blocking formula arc light protecting system and method - Google Patents
Voltage blocking formula arc light protecting system and method Download PDFInfo
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- CN106058819B CN106058819B CN201610394191.3A CN201610394191A CN106058819B CN 106058819 B CN106058819 B CN 106058819B CN 201610394191 A CN201610394191 A CN 201610394191A CN 106058819 B CN106058819 B CN 106058819B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/226—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for wires or cables, e.g. heating wires
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- Emergency Protection Circuit Devices (AREA)
Abstract
本发明提供一种电压闭锁式弧光保护系统及方法，包括：主控单元、电压采集单元和弧光传感器，所述弧光传感器，设置在电力传输母线上的各开关柜内，与所述主控单元连接；电压采集单元，设置在弧光保护装置内，与所述主控单元连接，用于电压信号；主控单元同时接收到弧光传感器感应所述电力传输母线上的弧光信号和所述电压采集单元发送的电压开放信号后，断开相应的电力传输开关。本发明的电压闭锁式弧光保护系统及方法，通过在电力传输过程中，当主控单元收到电压采集单元发出的电压开放信号和弧光传感器感应的弧光信号后断开开关，实现采用弧光和电压双判据来判定，提高了弧光保护的准确性、可靠性，并能够适应不接地系统中的单相接地故障情况。
The present invention provides a voltage blocking type arc protection system and method, comprising: a main control unit, a voltage acquisition unit and an arc sensor, the arc sensor is arranged in each switch cabinet on a power transmission bus, and is connected with the main control unit connection; the voltage acquisition unit is arranged in the arc protection device and is connected with the main control unit for voltage signals; the main control unit simultaneously receives the arc signal on the power transmission bus sensed by the arc sensor and the voltage acquisition unit After sending the voltage open signal, open the corresponding power transmission switch. In the voltage blocking arc protection system and method of the present invention, during the power transmission process, when the main control unit receives the voltage open signal from the voltage acquisition unit and the arc signal induced by the arc sensor, the main control unit disconnects the switch to realize the use of arc and voltage protection. Judging by double criteria, the accuracy and reliability of arc protection are improved, and it can adapt to single-phase ground fault conditions in ungrounded systems.
Description
Technical field
The present invention relates to Relay Protection Technology in Power System field more particularly to a kind of voltage blocking formula arc light protecting systems
And method.
Background technique
By existing projects of relay protection standard, middle voltage bus bar system does not configure dedicated quick bus protection generally.
But the standby overcurrent protection of upper level element (transformer) is relied on to cut off busbar short-circuit failure, result in fault clearing time
Extend, increases the degree of injury of equipment.With being increasing for power distribution cabinet installation point, maintenance, debugging test are more and more, thing
Therefore more and more frequently, harmfulness is increasing, causes huge economic loss and personal equipment breakdown.
Arc protection has quick action, and advantage easy for installation, cheap has obtained extensively in electric system in recent years
General application.Some researches show that when arc light accident occurs in switchgear, only total mute time is less than 85ms, can just make to set
Standby to be not subjected to damage, total mute time is greater than 100ms, it will different degrees of damage is caused to equipment.
Arc protection malfunction in order to prevent, existing arc protection generally use the double criterion principles of electric current, arc light, that is, protect
Device is detected simultaneously by the appearance of arc light and the increase of electric current just thinks that short trouble has occurred.And current China 10kv power transmission line
Road neutral point is generally earth-free, occur singlephase earth fault when, current variation value very little, far smaller than with electric current when phase fault
Changing value, barring condition is invalid when leading to singlephase earth fault, and arc light protecting device would not issue trip operation life at this time
It enables.If singlephase earth fault initial stage does not cut off, phase-to phase fault can be developed into, phase-to phase fault can cause very electric system
Big damage, this is not permitted during electric system operates normally.
Summary of the invention
The present invention provides a kind of voltage blocking formula arc light protecting system and method, for improve arc protection accuracy and
Reliability.
On the one hand, the present invention provides a kind of voltage blocking formula arc light protecting system, comprising: main control unit, voltage acquisition list
Member and arc photosensor, wherein
The arc photosensor is arranged in each switchgear on power transmission bus, and connect with the main control unit,
For incuding arc optical signal and being sent to main control unit；
Voltage acquisition unit, setting are connect in arc light protecting device, and with the main control unit by core bus, are used
In acquisition busbar voltage clearing signal and it is sent to main control unit；
Main control unit, for receiving the voltage clearing signal and arc photosensor sense that the voltage acquisition unit is sent
Corresponding power transmission switch is disconnected after answering the arc optical signal on the power transmission bus.
Preferably, the voltage acquisition unit is analog quantity sampling card.
Preferably, the analog quantity sampling card includes low-voltage, positive sequence voltage and residual voltage pass filter.
Preferably, the main control unit is CPU.
On the other hand, the present invention provides a kind of voltage blocking formula arc light based on above-mentioned voltage blocking formula arc light protecting system
Guard method characterized by comprising
Voltage signal of voltage acquisition unit during power transmission on induction power transmission bus；
Main control unit is receiving the voltage clearing signal and arc photosensor induction institute that the voltage acquisition unit is sent
Corresponding power transmission switch is disconnected after stating the arc optical signal on power transmission bus.
Preferably, the method also includes: when phase fault, alternate ground short circuit and/or list occur for power transmission bus
Arc light reaction is issued when being mutually grounded, arc photosensor incudes arc optical signal.
Preferably, the main control unit is receiving the voltage clearing signal and arc light biography that the voltage acquisition unit is sent
Sensor disconnects corresponding power transmission switch after incuding the arc optical signal on the power transmission bus, comprising:
When power transmission bus occur phase fault when, receive low-voltage pass filter transmission voltage clearing signal and
Corresponding power transmission switch is disconnected after the arc optical signal that arc photosensor is sent.
Preferably, the main control unit is receiving the voltage clearing signal and arc light biography that the voltage acquisition unit is sent
Sensor disconnects corresponding power transmission switch after incuding the arc optical signal on the power transmission bus, comprising:
When power transmission bus single-phase earthing or interphase short circuit grounding fault, sent receiving residual voltage pass filter
Voltage clearing signal and the arc optical signal that sends of the arc photosensor after disconnect corresponding power transmission switch.
As shown from the above technical solution, voltage blocking formula arc light protecting system of the invention and method, by being passed in electric power
During defeated, arc optical signal and institute on the power transmission bus are incuded when main control unit receives arc photosensor at the same time
After the voltage clearing signal for stating voltage acquisition unit transmission, driving exit relay disconnects corresponding power transmission switch, realizes
Determined using arc light and the double criterions of voltage, accuracy, the reliability of arc protection is improved, so that it is split to reduce arc fault
The damage for closing cabinet, avoids injury of the arc fault to electricity operator.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the voltage blocking formula arc light protecting system that one embodiment of the invention provides；
Fig. 2 is the flow diagram for the voltage blocking formula arc light protection method that one embodiment of the invention provides.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
Fig. 1 shows one embodiment of the invention and provides a kind of voltage blocking formula arc light protecting system, comprising: main control unit,
Voltage acquisition unit and arc photosensor, wherein
The arc photosensor is arranged in the switchgear of power transmission bus, and connect with the main control unit, is used for
Induction arc optical signal is simultaneously sent to main control unit.As shown in Figure 1, the first transformer is electrically connected with the first power transmission bus, the
Two transformers are electrically connected with the second power transmission bus.It is evenly arranged with arc photosensor on every power transmission bus, often
Power transmission bus passes through switch (K4, K5, K6, K7) and forms power transmission with user, electric substation and connect.First electric power passes
Defeated bus and the second power transmission bus pass through switch K3 connection, and the first transformer and the first power transmission bus pass through switch K1
Connection, the second transformer and the second power transmission bus pass through K2 connection.
Voltage acquisition unit is arranged in arc light protecting device, and is connect by core bus with the main control unit, uses
In induced voltage clearing signal and it is sent to main control unit.The voltage acquisition unit can be analog acquisition card, in addition again root
Low-voltage, positive sequence voltage and residual voltage pass filter are chosen as according to voltage difference calculated.
Main control unit, for receiving the voltage clearing signal and arc photosensor sense that the voltage acquisition unit is sent
Corresponding power transmission switch is disconnected after answering the arc optical signal on the power transmission bus.The main control unit is central processing
Device (CPU) carries out the control of entire control process.
Specific control process are as follows:
When phase fault occurs for power transmission bus, voltage acquisition unit acquires bus three-phase voltage, wherein low-voltage
Pass filter calculates voltage between phases value, and judges whether voltage between phases value meets the condition of low tension
When power transmission bus single-phase earthing or phase fault are grounded, voltage acquisition unit acquires bus three-phase voltage,
Wherein residual voltage pass filter calculates residual voltage value, and judges whether residual voltage meets the condition of residual voltage overvoltage.
It should be noted that two conditions that above-mentioned two process is embodied, as long as reaching wherein any one condition,
The main control unit can open arc protection function.
If the three-phase undertaken when the first transformer breaks down, then need to disconnect switch K1 and K3.Such as when the second transformation
The three-phase that device is undertaken breaks down, then needs to disconnect switch K2 and K3.
Whole process is established after the failure occurred, and main control unit receives the voltage clearing signal of voltage acquisition unit sending
Afterwards, arc protection function is just opened, after main control unit receives the arc optical signal of arc photosensor acquisition, and then according to arc light
Signal disconnects switch.So that the application is determined using the double criterions of arc light and voltage, the accuracy, reliable of arc protection is improved
Property, to reduce damage of the arc fault to switchgear, avoid injury of the arc fault to electricity operator.
Fig. 2 shows another embodiment of the present invention provides a kind of electricity based on above-mentioned voltage blocking formula arc light protecting system
Press off locking-type arc light protection method, comprising:
The voltage signal of S21, voltage acquisition unit during power transmission on induction power transmission bus.
In this step, it should be noted that when power transmission bus occur phase fault, alternate ground short circuit and/or
When single-phase earthing, there will certainly be the variation of voltage signal, therefore, using on voltage acquisition unit induction power transmission bus
Voltage signal.
S22, main control unit are after receiving the voltage clearing signal that the voltage acquisition unit is sent, open arc protection
Function, and corresponding power transmission switch is disconnected after receiving the arc optical signal that the arc photosensor is sent.
In this step, it should be noted that when phase fault occurs for power transmission bus, main control unit is being received
After the voltage clearing signal that positive sequence voltage filter is sent, open arc protection function, and receiving the arc photosensor
Corresponding power transmission switch is disconnected after the arc optical signal of transmission.
When power transmission bus single-phase earthing or phase fault are grounded, main control unit is receiving residual voltage pass filter
After the voltage clearing signal of transmission, open arc protection function, and in the arc optical signal for receiving the arc photosensor transmission
After disconnect corresponding power transmission switch.
It should be noted that two conditions that above-mentioned two process is embodied, as long as reaching wherein any one condition,
Arc protection function can be opened.
If the three-phase undertaken when the first transformer breaks down, then need to disconnect switch K1 and K3.Such as when the second transformation
The three-phase that device is undertaken breaks down, then needs to disconnect switch K2 and K3.
Whole process is established after the failure occurred, and main control unit receives the voltage clearing signal of voltage acquisition unit generation
Afterwards, open arc protection function, after main control unit receives the arc optical signal of arc photosensor acquisition again, and then according to arc light
Signal disconnects switch.So that the application is determined using the double criterions of arc light and voltage, the accuracy, reliable of arc protection is improved
Property, to reduce damage of the arc fault to switchgear, avoid injury of the arc fault to electricity operator.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included certain features rather than other feature, but the combination of the feature of different embodiments mean it is of the invention
Within the scope of and form different embodiments.For example, in the following claims, embodiment claimed is appointed
Meaning one of can in any combination mode come using.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and ability
Field technique personnel can be designed alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference symbol between parentheses should not be configured to limitations on claims.Word "comprising" does not exclude the presence of not
Element or step listed in the claims.Word "a" or "an" located in front of the element does not exclude the presence of multiple such
Element.The present invention can be by means of including the hardware of several different elements and being come by means of properly programmed computer real
It is existing.In the unit claims listing several devices, several in these devices can be through the same hardware branch
To embody.The use of word first, second, and third does not indicate any sequence.These words can be explained and be run after fame
Claim.
Those of ordinary skill in the art will appreciate that: the above embodiments are only used to illustrate the technical solution of the present invention., and
It is non-that it is limited；Although present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art
It is understood that it is still possible to modify the technical solutions described in the foregoing embodiments, either to part of or
All technical features are equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution this hair
Bright claim limited range.
Claims (8)
1. a kind of voltage blocking formula arc light protecting system characterized by comprising main control unit, voltage acquisition unit and arc light
Sensor, wherein
The arc photosensor, setting is connect on power transmission bus, and with the main control unit, for incuding arc optical signal
And it is sent to main control unit；
Voltage acquisition unit, setting is connect in arc light protecting device, and with the main control unit by core bus, for feeling
It answers voltage clearing signal and is sent to main control unit；
Main control unit, for receiving described in the voltage clearing signal and arc photosensor induction that the voltage acquisition unit is sent
Corresponding power transmission switch is disconnected after arc optical signal on power transmission bus；
Specifically: after the main control unit receives the voltage clearing signal that the voltage acquisition unit issues, open arc light is protected
Shield；Under arc protection state, after the main control unit receives the arc optical signal of arc photosensor acquisition, believed according to arc light
Number disconnect corresponding power transmission switch.
2. system according to claim 1, which is characterized in that the voltage acquisition unit is analog quantity sampling card.
3. system according to claim 2, which is characterized in that the analog quantity sampling card includes low-voltage, positive sequence voltage
With residual voltage pass filter.
4. system according to claim 1, which is characterized in that the main control unit is CPU.
5. a kind of voltage based on voltage blocking formula arc light protecting system described in any claim in the claims 1-4 closes
Locking-type arc light protection method characterized by comprising
Voltage signal of voltage acquisition unit during power transmission on induction power transmission bus；
Main control unit is receiving the voltage clearing signal and the arc photosensor induction electricity that the voltage acquisition unit is sent
Corresponding power transmission switch is disconnected after arc optical signal on power transmission bus；
Specifically: after the main control unit receives the voltage clearing signal that the voltage acquisition unit issues, open arc light is protected
Shield；Under arc protection state, after the main control unit receives the arc optical signal of arc photosensor acquisition, believed according to arc light
Number disconnect corresponding power transmission switch.
6. according to the method described in claim 5, it is characterized in that, the method also includes: when power transmission bus occur phase
Between short circuit, alternate ground short circuit and/or when single-phase earthing issue arc light, arc photosensor incudes arc optical signal.
7. according to the method described in claim 6, it is characterized in that, the main control unit is receiving the voltage acquisition unit
The voltage clearing signal and arc photosensor of transmission disconnect corresponding electricity after incuding the arc optical signal on the power transmission bus
Power transmitting switch, comprising:
When phase fault occurs for power transmission bus, in the voltage clearing signal and arc light for receiving the transmission of low-voltage pass filter
Corresponding power transmission switch is disconnected after the arc optical signal that sensor is sent.
8. according to the method described in claim 6, it is characterized in that, the main control unit receives the voltage acquisition unit hair
The voltage clearing signal and arc photosensor sent disconnects corresponding electric power after incuding the arc optical signal on the power transmission bus
Transmitting switch, comprising:
When power transmission bus single-phase earthing or interphase short circuit grounding fault, in the electricity for receiving the transmission of residual voltage pass filter
Corresponding power transmission switch is disconnected after pressing off the arc optical signal that discharge signal and the arc photosensor are sent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610394191.3A CN106058819B (en) | 2016-06-06 | 2016-06-06 | Voltage blocking formula arc light protecting system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610394191.3A CN106058819B (en) | 2016-06-06 | 2016-06-06 | Voltage blocking formula arc light protecting system and method |
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| CN106058819A CN106058819A (en) | 2016-10-26 |
| CN106058819B true CN106058819B (en) | 2018-12-07 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110416977B (en) * | 2019-06-14 | 2021-06-29 | 国网河南省电力公司灵宝市供电公司 | Busbar protection module with ground signal blocking |
| CN111799763A (en) * | 2020-07-02 | 2020-10-20 | 云南电网有限责任公司电力科学研究院 | Arc protection method and system |
| CN112904226B (en) * | 2021-01-19 | 2022-08-23 | 国网河北省电力有限公司 | Method for rapidly judging short-circuit fault of high-voltage bus based on induced electricity |
Citations (3)
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|---|---|---|---|---|
| WO2008113742A2 (en) * | 2007-03-16 | 2008-09-25 | Abb Technology Ltd. | Compact secondary substation comprising an arcing fault protection system, a method for arcing fault protection in a compact secondary substation, and a control unit for performing the method |
| CN204835513U (en) * | 2015-07-01 | 2015-12-02 | 神华集团有限责任公司 | Voltage type arc light protection device |
| CN205283108U (en) * | 2015-12-30 | 2016-06-01 | 嘉兴瑞盛智能电网科技有限公司 | Main busbar protection device in medium and low voltage switchgear suitable for various operation modes |
-
2016
- 2016-06-06 CN CN201610394191.3A patent/CN106058819B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008113742A2 (en) * | 2007-03-16 | 2008-09-25 | Abb Technology Ltd. | Compact secondary substation comprising an arcing fault protection system, a method for arcing fault protection in a compact secondary substation, and a control unit for performing the method |
| CN204835513U (en) * | 2015-07-01 | 2015-12-02 | 神华集团有限责任公司 | Voltage type arc light protection device |
| CN205283108U (en) * | 2015-12-30 | 2016-06-01 | 嘉兴瑞盛智能电网科技有限公司 | Main busbar protection device in medium and low voltage switchgear suitable for various operation modes |
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| CN106058819A (en) | 2016-10-26 |
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