CN203773009U - High-voltage switch cabinet partial discharge on-line monitoring system - Google Patents
High-voltage switch cabinet partial discharge on-line monitoring system Download PDFInfo
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- CN203773009U CN203773009U CN201420093754.1U CN201420093754U CN203773009U CN 203773009 U CN203773009 U CN 203773009U CN 201420093754 U CN201420093754 U CN 201420093754U CN 203773009 U CN203773009 U CN 203773009U
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- 238000009413 insulation Methods 0.000 abstract description 5
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- 238000005259 measurement Methods 0.000 description 11
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- 238000001514 detection method Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
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Abstract
The utility model discloses a high-voltage switch cabinet partial discharge on-line monitoring system. The monitoring system comprises a central data analyzer host, a plurality of partial discharge signal sensors and a partial discharge waveform analyzer, wherein the partial discharge signal sensors are connected to the central data analyzer host through signal transmission cables, and the partial discharge waveform analyzer is connected to the central data analyzer host through network communication interfaces. In this manner, a reliable partial discharge monitoring and positioning method is provided for partial discharge monitoring of a high-voltage switch cabinet, an alarm is given at the early stage of an insulation fault of the high-voltage switch cabinet, an effect of major accident prevention is achieved, and high requirements for power supply reliability of smart power grids are met.
Description
Technical field
The utility model relates to partial discharge monitoring, more specifically, relates to a kind of high-tension switch cabinet partial discharge monitoring system.
Background technology
High-tension switch cabinet is infrastructure important in urban power distribution network, and the stability of its operation directly has influence on the development of urban economy.Repair based on condition of component and on-line monitoring are the important technical that improves high-tension switch cabinet reliability.According to statistics, insulation and current-carrying fault account for the over half of switch cubicle fault, shelf depreciation is exactly the important indicator that characterizes high-tension switch cabinet insulation and current-carrying problem, and research high-tension switch cabinet Partial Discharge Detection and on-line monitoring technique are significant to improving power supply reliability.Measurement is put in the office of high-tension switch cabinet, common mode is to adopt ground electrical wave measurement method to patrol and examine at present, the method survey bureau high-volume cannot quantitative test, use ultrahigh frequency or ultrasonic method to be easily disturbed, use acoustoelectric combined method need to use plurality of devices, Technical Economy is bad, and location, source is put in the long-term on-line monitoring drawn game of switch cubicle can't realize popularization.Therefore, need a kind of better high-tension switch cabinet partial discharge monitoring system.
Summary of the invention
The utility model is for above technical matters, specially for high-tension switch cabinet Partial Discharge Detection field, work out a kind of high-tension switch cabinet partial discharge monitoring system, this partial discharge monitoring system can either realize the long-term real time on-line monitoring for switch cubicle, can put by the analysis of Monitoring Data being carried out to office again the location in source, before having solved, need multiple devices to coordinate the accurate judgement of ability office to put the problem in source.
For solving the problems of the technologies described above, the utility model adopts following technical proposals:
High-tension switch cabinet partial discharge monitoring system, this monitoring system comprises:
High-tension switch cabinet partial discharge monitoring system, is characterized in that, this monitoring system comprises:
Central data analyzer main frame, multiple Partial discharge signal sensor drawn game electric discharge atlas analysis instrument, described multiple Partial discharge signal sensor is connected with described central data analyzer main frame by signal-transmitting cable, and described shelf depreciation atlas analysis instrument is connected with described central data analyzer main frame by network communication interface.
Described local signal sensor comprises that sensor is put in capacitance coupling type office, sensor is put in inductive coupling office and sensor is put in space electromagnetic wave type office.
Described capacitance coupling type office puts sensor and comprises coupling capacitance and connected first game discharge signal amplifier, the pulsed current signal that described Partial discharge signal amplifier collects coupling capacitance amplifies, and gives the analysis of central data analyzer by signal-transmitting cable.
Described inductive coupling office puts sensor and comprises Rogowski coil and connected second game discharge signal amplifier.
Described space electromagnetic wave type office puts sensor and comprises antenna and connected the 3rd Partial discharge signal amplifier.
Described signal-transmitting cable is the concentric cable of band shielding.
Described central data analyzer main frame can connect three kinds of Partial discharge signal sensors and be used singly or in combination respectively.
Described coupling capacitance can with high-tension switch cabinet in charged display device electric capacity share, or in addition arrange.
The beneficial effects of the utility model are as follows:
(1) the utility model can be realized for the long-term Real-Time Monitoring drawn game of switch cabinet partial discharge and put source analyzing and positioning with this set of switch cabinet partial discharge on-line monitoring system.
(2) the Partial discharge signal sensor that monitoring system of the present utility model can be compatible dissimilar.
(3) on-line monitoring system of the present utility model intuitively shows with pC value, and is can carry out verification in the switch cabinet system of operation.
(4) the utility model can make full use of the element in existing switch cubicle, form a compatible non-interfering voltage monitoring drawn game again with charged display device system and put monitoring system, on-line monitoring is put in the office that realizes switch cubicle with minimum cost and minimum change.
Brief description of the drawings
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Fig. 1 illustrates high-tension switch cabinet partial discharge monitoring system architecture schematic diagram.
Embodiment
In order to be illustrated more clearly in the utility model, below in conjunction with preferred embodiments and drawings, the utility model is described further.Parts similar in accompanying drawing represent with identical Reference numeral.It will be appreciated by those skilled in the art that specifically described content is illustrative and nonrestrictive below, should not limit protection domain of the present utility model with this.
As shown in Figure 1, high-tension switch cabinet partial discharge monitoring system is mainly made up of Partial discharge signal sensor 3,4,5 and signal-transmitting cable 6, central data analyzer main frame 2 and shelf depreciation atlas analysis instrument 7.This system is for operating high-tension switch cabinet is carried out to lasting on-line monitoring, in the time that inside switch cabinet produces shelf depreciation, local discharge signal amplifies through sensor collection, in central data analyzer main frame 2, carry out data analysis, can come intuitively discharge capacity to be presented in the LCD Panel 8 in central data analyzer main frame with pC value (skin coulomb), in the time that partial discharge quantity exceedes the threshold value of system setting, central data analyzer main frame 2 sends alerting signal, alarm relay 13 is put in triggering office, also can send data to operation maintenance personnel with communication by network communication interface 11, operation maintenance personnel can utilize shelf depreciation atlas analysis instrument 7 to carry out deep analysis and the location of Partial Discharge Sources to shelf depreciation.This system can be put monitoring and localization method for the partial discharge monitoring of high-tension switch cabinet provides a kind of office reliably, can at the beginning of occurring, switch cubicle insulation fault report to the police, the effect that plays prevention major accident, has adapted to intelligent grid for power supply reliability high request.
Partial discharge signal sensor is the critical elements of obtaining switch cabinet partial discharge signal, and what the performance of sensor had determined whether Partial discharge signal can be correct extracts.The local discharge signal sensor that native system connects has three types, is respectively that capacitance coupling type office puts that sensor 3, inductive coupling office are put sensor 4, sensor 5 is put in space electromagnetic wave type office.Characteristic to these three kinds of sensors and service condition are introduced respectively below.
Capacitance coupling type office puts sensor 3 and is made up of coupling capacitance 14 and first game discharge signal amplifier 15, its ultimate principle is to gather Partial discharge signal by coupling capacitance 14, amplify through first game discharge signal amplifier 15, then be sent in central data analyzer main frame 2 and analyze by signal-transmitting cable 6.For high-tension switch cabinet ABC three-phase, often need mutually to install a high pressure coupling capacitance, three coupling capacitances 14 are connected on a first game discharge signal amplifier 15 by shielding line, are then connected on the measurement path 10 of central data analyzer main frame 2 by a signal-transmitting cable 6.Charged display device 16 is all housed on nearly all switch cubicle, the high pressure sensor the inside that charged display device 16 connects is exactly an electric capacity, for farthest utilize existing switch cubicle in element, reduce costs, we can utilize electric capacity in electrification display high pressure sensor as coupling capacitance 14, by the Circuit Matching in first game discharge signal amplifier 15, ensure neither to affect the function of original switch cabinet electrified display device 16, can put to measure for office again provides signal.This mode is to measure the best mode that threephase switch cabinet office puts.
Inductive coupling Partial discharge signal sensor 4 is made up of Rogowski coil 18 and second game's discharge signal amplifier 19, based on the principle of measuring ground connection pulse current, carry out office for the earth point of equipment in the screen layer of cable termination or switch cubicle and put measurement, carry out signal amplification and anti-interference process by second game's discharge signal amplifier 19, be then connected with central data analyzer main frame 2 by signal-transmitting cable 6.The high frequency being caused by shelf depreciation can use Rogowski coil 18 to carry out record to vagabond current, and Rogowski coil 18 winding lengths will be wrapped on the earth conductor of high-tension switch cabinet completely.Must guarantee that these detected elements only have a definite earth point, other part insulation against ground.
Space electromagnetic wave type office puts sensor 5 and is made up of antenna 20 and the 3rd Partial discharge signal amplifier 21, is arranged in the metallic shield interval of switch cubicle, and antenna is arranged between high voltage component and earth potential, forms a capacitive divider.The output signal of antenna depends on the distance between shelf depreciation point and earth potential, antenna detection to signal carry out signal amplification and anti-interference process by the 3rd Partial discharge signal amplifier 21, be then connected with central data analyzer main frame 2 by signal-transmitting cable 6.Antenna can be a kind of metal antenna herein, and metal antenna and high-pressure side have formed a space capacitor C 1, and metal antenna and earth potential end have formed a space capacitor C 2, and these two space electric capacity have carried out dividing potential drop.
Signal-transmitting cable 6, for the concentric cable of band shielding, for shielding undesired signal, prevents that it from entering central data analyzer main frame 2 and affecting measurement result.The high frequency Partial discharge signal that this cable records each sensor is sent in central data analyzer main frame 2, and it also will provide power supply for the circuit in Partial discharge signal sensor.
Central data analyzer main frame 2 aims at the long-term on-line monitoring of partial discharge of switchgear and designs, it is non-maintaining that this main frame can be realized long-term work, each central data analyzer main frame 2 can connect at most 8 and measure path 10, each passage can arrange respectively alarm threshold value and disturb and suppress, the sensitivity of measuring is 1pC, and measurement range is 1-30000pC.For the monitoring system that exceedes 8 points, can use many central data analyzer main frames 2 to carry out cascade.Adopt this mode, can form any number of offices and put monitoring system a little.Central data analyzer main frame 2 has self diagnosis and device failure alert function, and the short circuit of discernible signal transmission cable and open circuit fault can transfer data to by communication the supervisory control comuter of upper level.On central data analyzer main frame, there are LCD Panel 8 and action button 9, on screen, can show office's Real-Time Monitoring value of putting of each passage, show with pC value.If office's value of putting that central data analyzer main frame 2 measures has exceeded alarm threshold value, will triggering office putting alarm relay 13 reports to the police, if fault has occurred in central data analyzer main frame 2 inside, will report to the police by trigger equipment self-monitoring alarm relay 12.
Shelf depreciation type can roughly be divided into following three kinds: internal discharge (occurring in insulator inside), surface-discharge (occurring in insulator surface), corona discharge (occurring in around the conductor being surrounded by gas), the different electric discharges collection of illustrative plates that takes on a different character, shelf depreciation atlas analysis instrument 8 can carry out deep analysis to the collection of illustrative plates of shelf depreciation, the location of the type of auxiliary judgment shelf depreciation and Partial Discharge Sources head.Especially for adopting capacitance coupling type office to put sensor 3, switch cubicle three-phase Partial discharge signal is delivered to Partial discharge signal in central data analyzer main frame 2 as signal-transmitting cable 6 by a concentric cable after entering sensor, this atlas analysis instrument can be shown to Partial discharge signal phase-splitting on analyser interface, is convenient to judgement office and puts and occur in which in switch cubicle three-phase and go up mutually.And can carry out following parameter setting to central data-analyzing machine main frame 2: device name, the sampling rate of all measurement passages, measure the quantity of passage, the level of channel number and noise suppression, each measurement channel measurement point text, alarm ON/OFF, local discharge sensor measurement range, digital interface enlargement factor, background noise suppresses, and shelf depreciation alarm threshold value and peak value time delay can also show the result of current overall measurement value and selftest in addition.
Partial discharge signal generator 22 is placed on line monitoring system measured value for playing a game under the condition of charged, on-load carries out verification, and the sensitivity of this Partial discharge signal generator 22 is 1pC, and measurement range is 1-30000pC.Partial discharge signal generator 22 produces the nuclear phase hole 17 of simulation Partial discharge signal from charged display device 16 and injects, and can provide correction signal for office's value of putting that central data analyzer main frame 2 is measured.
Obviously; above-described embodiment of the present utility model is only for the utility model example is clearly described; and be not the restriction to embodiment of the present utility model; for those of ordinary skill in the field; can also make other changes in different forms on the basis of the above description; here cannot give all embodiments exhaustively, everyly belong to apparent variation or the still row in protection domain of the present utility model of variation that the technical solution of the utility model extends out.
Claims (8)
1. high-tension switch cabinet partial discharge monitoring system, is characterized in that, this monitoring system comprises:
Central data analyzer main frame, multiple Partial discharge signal sensor drawn game electric discharge atlas analysis instrument, described multiple Partial discharge signal sensor is connected with described central data analyzer main frame by signal-transmitting cable, and described shelf depreciation atlas analysis instrument is connected with described central data analyzer main frame by network communication interface.
2. high-tension switch cabinet partial discharge monitoring system according to claim 1, is characterized in that, described local signal sensor comprises that sensor is put in capacitance coupling type office, sensor is put in inductive coupling office and sensor is put in space electromagnetic wave type office.
3. high-tension switch cabinet partial discharge monitoring system according to claim 2, it is characterized in that, described capacitance coupling type office puts sensor and comprises coupling capacitance and connected first game discharge signal amplifier, the pulsed current signal that described Partial discharge signal amplifier collects coupling capacitance amplifies, and gives the analysis of central data analyzer by signal-transmitting cable.
4. high-tension switch cabinet partial discharge monitoring system according to claim 2, is characterized in that, described inductive coupling office puts sensor and comprises Rogowski coil and connected second game discharge signal amplifier.
5. high-tension switch cabinet partial discharge monitoring system according to claim 2, is characterized in that, described space electromagnetic wave type office puts sensor and comprises antenna and connected the 3rd Partial discharge signal amplifier.
6. high-tension switch cabinet partial discharge monitoring system according to claim 2, is characterized in that, described signal-transmitting cable is the concentric cable of band shielding.
7. high-tension switch cabinet partial discharge monitoring system according to claim 2, is characterized in that, described central data analyzer main frame can connect three kinds of Partial discharge signal sensors and be used singly or in combination respectively.
8. high-tension switch cabinet partial discharge monitoring system according to claim 3, is characterized in that, described coupling capacitance can with high-tension switch cabinet in charged display device electric capacity share, or in addition arrange.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420093754.1U CN203773009U (en) | 2014-03-03 | 2014-03-03 | High-voltage switch cabinet partial discharge on-line monitoring system |
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| CN201420093754.1U CN203773009U (en) | 2014-03-03 | 2014-03-03 | High-voltage switch cabinet partial discharge on-line monitoring system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502759A (en) * | 2014-12-19 | 2015-04-08 | 国家电网公司 | Intelligent monitoring system of distribution network switch cabinet |
| CN108732478A (en) * | 2018-09-10 | 2018-11-02 | 清华四川能源互联网研究院 | Partial discharge of switchgear on-line monitoring system based on superfrequency punching current sensor and method |
| CN119556083A (en) * | 2025-01-24 | 2025-03-04 | 国网浙江省电力有限公司温州市洞头区供电公司 | A method and system for detecting partial discharge of high voltage cables |
-
2014
- 2014-03-03 CN CN201420093754.1U patent/CN203773009U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502759A (en) * | 2014-12-19 | 2015-04-08 | 国家电网公司 | Intelligent monitoring system of distribution network switch cabinet |
| CN108732478A (en) * | 2018-09-10 | 2018-11-02 | 清华四川能源互联网研究院 | Partial discharge of switchgear on-line monitoring system based on superfrequency punching current sensor and method |
| CN119556083A (en) * | 2025-01-24 | 2025-03-04 | 国网浙江省电力有限公司温州市洞头区供电公司 | A method and system for detecting partial discharge of high voltage cables |
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Owner name: GAO HAITAO Free format text: FORMER OWNER: GUOLIAN SICHUANG (BEIJING) TECHNOLOGY CO., LTD. Effective date: 20141223 |
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Effective date of registration: 20141223 Address after: 100018, room 4, building 1-401, building 181, Jing Jing home, Chaoyang District, Beijing Patentee after: Gao Haitao Address before: 100018, room 4, building 1-401, building 181, Jing Jing home, Chaoyang District, Beijing Patentee before: GLSC (BEIJING) TECHNOLOGY CO.,LTD. |
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Effective date of registration: 20200403 Address after: 100018, room 4, building 1-401, building 181, Jing Jing home, Chaoyang District, Beijing Patentee after: GLSC (BEIJING) TECHNOLOGY Co.,Ltd. Address before: 100018, room 4, building 1-401, building 181, Jing Jing home, Chaoyang District, Beijing Patentee before: Gao Haitao |
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