CN202940570U - Grounding protection controller for 10kV capacitor reactive compensation device - Google Patents
Grounding protection controller for 10kV capacitor reactive compensation device Download PDFInfo
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- CN202940570U CN202940570U CN 201220281726 CN201220281726U CN202940570U CN 202940570 U CN202940570 U CN 202940570U CN 201220281726 CN201220281726 CN 201220281726 CN 201220281726 U CN201220281726 U CN 201220281726U CN 202940570 U CN202940570 U CN 202940570U
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Abstract
The utility model provides a grounding protection controller for a 10kV capacitor reactive compensation device so as to realize safe operation of equipment. The grounding protection controller is applied to the 10kV capacitor reactive compensation device. Capacitors are grouped, switched, and star-sealed at a capacity regulating switch. The grounding protection controller can automatically recognize small current grounding faults of the capacitors and break a circuit breaker to eliminate the faults. The controller automatically collects capacitance current signals and breaking and closing state signals of the capacitor regulating switch. When the capacitor regulating switch is at a breaking state, the controller compares an actually measured capacitance current signal with a set value. When the actually measured value is greater than the set value, the controller judges a grounding fault occurs. The controller sends a breaking instruction to a system, and the circuit breaker cuts off the capacitor group so as to isolate the fault. The grounding protection controller provided by the utility model is reasonable in structure, strong in practicability, and conducive to popularization and application.
Description
Technical field
The utility model belongs to 10kV capacitance reactive compensation resist technology field, relates in particular to a kind of neutral point by the capacitor installation generation earth fault protection of switch envelope star.
Background technology
For the idle variation of adaptive system, 10kV capacitance reactive compensation device often adopts grouping capacity transfer mode.For the subdivided capacitor the complete sets of equipment, for sealing in capacitance switch usually in the middle of every group capacitor, capacity transfer selects the capacitor group.In some cases, capacitance switch is installed in the capacitor group end, and the place seals star at capacitance switch.Capacitance switch disconnects, and capacitor logs off; Capacitance switch closes, the capacitor connecting system.
Capacitance switch disconnects, and in the capacitor group, miscellaneous part is still charged over the ground at this moment, may occur to puncture over the ground, causes earth fault, in order in time to fix a breakdown, needs detect and take measures this fault.
Summary of the invention
The utility model purpose: the utility model provides a kind of 10kV capacitance reactive compensation device ground protection controller that has automatic detection, gets rid of earth fault, its objective is the problem that solution capacitor group in the past easily breaks down.
Technical scheme: the utility model is achieved through the following technical solutions:
10kV capacitance reactive compensation device ground protection controller is characterized in that: the device of access three phase network when this protection controller is use, and this protection controller comprises: signal acquisition module, central processing module and Executive Module; Described central processing module by connection to signal acquisition module and Executive Module; Described signal acquisition module and Executive Module are connected to three phase network.
Described signal acquisition module comprises for the capacitance current collecting unit that gathers first group of three phase capacitance electric current, is used for the capacitance current collecting unit of second group of three phase capacitance electric current of collection and the opening and closing state signal gathering unit that is used for gathering first group and second group capacitance switch opening and closing state signal;
Described central processing module comprises the second memory cell and the computing unit of the first memory cell, second group of capacitance current of storage and the capacitance switch opening and closing state of first group of capacitance current of storage and capacitance switch opening and closing state.
Described first group of capacitance current collecting unit comprises the first capacitance current collecting unit, the second capacitance current collecting unit and the 3rd capacitance current collecting unit; Described second group of capacitance current collecting unit comprises first capacitance current collecting unit, second capacitance current collecting unit and the 3rd capacitance current collecting unit; Described capacitance switch opening and closing state collecting unit comprises first group of capacitance switch opening and closing state acquisition module and second group of capacitance switch opening and closing state acquisition module;
Described the first memory cell comprises the first capacitance current memory cell, the second capacitance current memory cell, the 3rd capacitance current memory cell and first group of capacitance switch memory cell; Described the second memory cell comprises first capacitance current memory cell, second capacitance current memory cell, the 3rd capacitance current memory cell and second group of capacitance switch memory cell; Described computing unit comprises first group of electric capacity computing unit and second group of electric capacity computing unit;
Described the first memory cell is respectively by connection to the first group capacitance current collecting unit and the first capacitance switch opening and closing state collecting unit; The second memory cell is respectively by connection to the second group capacitance current collecting unit and the second capacitance switch opening and closing state collecting unit; First group of capacitance current collecting unit, second group of capacitance current collecting unit and divide-shut brake signal gathering unit are connected to three phase network; Described computing unit is connected to Executive Module.
The first capacitance current memory cell, the second capacitance current memory cell and the 3rd capacitance current memory cell be corresponding the first capacitance current collecting unit, the second capacitance current collecting unit and the 3rd capacitance current collecting unit of being connected to respectively; The first capacitance current collecting unit, the second capacitance current collecting unit and the 3rd capacitance current collecting unit be the three phase terminals that is connected to three phase network of correspondence respectively; First capacitance current memory cell in described the second memory cell, second capacitance current memory cell and the 3rd capacitance current memory cell be corresponding first capacitance current collecting unit in second group of capacitance current collecting unit, second capacitance current collecting unit and the 3rd capacitance current collecting unit of being connected to respectively also; First capacitance current collecting unit, second capacitance current collecting unit and the 3rd capacitance current collecting unit be the corresponding three phase terminals that is connected to three phase network respectively; Described first group of capacitance switch memory cell is connected to first group of capacitance switch opening and closing state acquisition module; Described second group of capacitance switch memory cell is connected to second group of capacitance switch opening and closing state acquisition module; Described first group of capacitance switch opening and closing state acquisition module and second group of capacitance switch opening and closing state acquisition module are connected to respectively capacitance switch K1 and K2 in corresponding three phase network;
Described first group of electric capacity computing unit is connected to the first memory cell on the one hand, is connected on the other hand Executive Module; Second group of electric capacity computing unit is connected to the second memory cell on the one hand, is connected on the other hand Executive Module; Described performance element is connected to the reactive compensation switch cabinet circuit breaker in three phase network.
Advantage and effect: the utility model provides a kind of 10kV capacitance reactive compensation device ground protection controller, the Executive Module that described controller comprises for the acquisition module that gathers condenser current signal and capacitance switch opening and closing state signal, is used for judging the central processing module of earth fault and is used for getting rid of earth fault.Described acquisition module comprises, is used for gathering every group capacitor a b, the capacitance current collecting unit of c three-phase current and be used for gathering the opening and closing state signal gathering unit of capacitance switch opening and closing state.Described central processing module comprises, is used for the memory cell and the computing unit that judges whether ground connection of storage capacitance electric current and capacitance switch opening and closing state.Described Executive Module comprises the performance element that sends the separating brake instruction to system's circuit breaker.Described central processing module adopts the PAC control system.The advantages such as it is strong that the PAC control system has stability, and reliable, speed is fast.
The utility model is realized the safe operation of equipment, and it is applied in 10kV capacitance reactive compensation device, and electric capacity grouping switching and at capacitance switch place envelope star can automatically identify the capacitor low current grounding, and the separating brake circuit breaker is eliminated fault.In every group capacitor inlet wire side, current transformer is installed, after capacitance switch disconnects, if should organize the current transformer reading greater than certain value, judge and earth fault occurs, controller sends instructions to reactive power compensation device switch cabinet inner breaker, and the excision capacitor is fixed a breakdown.
The utility model has overcome above-mentioned the deficiencies in the prior art, it provides a kind of device with detection voluntarily and debugging functions, the utility model is applied in 10kV electric capacity grouping switching and in the capacitance reactive compensation device of capacitance switch place envelope star, can automatically identify the capacitor low current grounding, and automatically eliminate fault, guarantee the device security reliability service.
Description of drawings:
Fig. 1 is circuit principle structure block diagram of the present utility model;
Embodiment:Below in conjunction with accompanying drawing, the utility model is described further:
As shown in Figure 1, the utility model provides a kind of 10kV capacitance reactive compensation device ground protection controller, described 10kV capacitance reactive compensation earth fault protection cartridge controller is drawn together a protection controller main body, access three phase network when described protection controller main body is used; Described protection controller main body comprises: signal acquisition module 1, central processing module 2 and Executive Module 3; Described central processing module 2 by connection to signal acquisition module 1 and Executive Module 3; Described signal acquisition module 1 and Executive Module 3 are connected to three phase network a, b, c.Signal acquisition module 1 is used for gathering condenser current signal and capacitance switch opening and closing state signal, and central processing module 2 is used for analyzing and determines whether and low current grounding occurs, and Executive Module 3 is carried out and sent out the separating brake instruction to system's circuit breaker.
Described signal acquisition module 1 comprises that for gathering first group of capacitance current collecting unit 11 that number in the figure is I1a, I1b and I1c, being used for gathering second group of capacitance current collecting unit 12 and the number in the figure that number in the figure is I2a, I2b and I2c be first group and second group of capacitance switch opening and closing state collecting unit 13 of K1 and K2;
Described central processing module 2 comprises for the first memory cell 21 of first group of capacitance current signal of storage and first group of capacitance switch opening and closing state, is used for the second memory cell 22 of second group of capacitance current signal of storage and second group of capacitance switch opening and closing state and is used for determining whether the computing unit 23 that small current neutral grounding occurs.
Described central processing module adopts the PAC control system.The advantages such as it is strong that the PAC control system has stability, and reliable, speed is fast.
Described first group of capacitance current collecting unit 11 comprises three a of first group of electric capacity, b, and c three-phase current collecting unit is respectively the first capacitance current collecting unit 111, the second capacitance current collecting unit 112 and the 3rd capacitance current collecting unit 113; Described the second capacitance current collecting unit 12 comprises three a of second group of electric capacity, b, and c three-phase current collecting unit is respectively first capacitance current collecting unit 121, second capacitance current collecting unit 122 and the 3rd capacitance current collecting unit 123; Described capacitance switch opening and closing state collecting unit 13 comprises first group and second group of capacitance switch opening and closing state collecting unit, is respectively first group of first capacitance switch opening and closing state collecting unit 131, second group of second capacitance switch opening and closing state collecting unit 132.
Described the first memory cell 21 comprises first group of three capacitance current memory cell and first group of capacitance switch opening and closing state memory cell, is respectively the first capacitance current memory cell 211, the second capacitance current memory cell 212, the 3rd capacitance current memory cell 213 and first group of capacitance switch memory cell 214; Described the second memory cell 22 comprises second group of three capacitance current memory cell and second group of capacitance switch opening and closing state memory cell, is respectively first capacitance current memory cell 221, second capacitance current memory cell 222, the 3rd capacitance current memory cell 223 and second group of capacitance switch memory cell 224; Described computing unit 23 comprises the computing unit that calculates first and second groups of electric capacity, is respectively first group of electric capacity computing unit 231 and second group of electric capacity computing unit 232.
Connected mode as shown in fig. 1, described the first memory cell 21 are respectively by connection to the first group capacitance current collecting unit 11 and the first capacitance switch opening and closing state collecting unit 131; The second memory cell 22 is respectively by connection to the second group capacitance current collecting unit 12 and the second capacitance switch opening and closing state collecting unit 132; First group of capacitance current collecting unit 11, second group of capacitance current collecting unit 12 and divide-shut brake signal gathering unit 13 are connected to three phase network a, b, c; Described computing unit 23 is connected to Executive Module 3.
The first capacitance current memory cell 211, the second capacitance current memory cell 212 and the 3rd capacitance current memory cell 213 be corresponding the first capacitance current collecting unit 111, the second capacitance current collecting unit 112 and the 3rd capacitance current collecting unit 113 of being connected to respectively; The first capacitance current collecting unit 111, the second capacitance current collecting unit 112 and the 3rd capacitance current collecting unit 113 be the three phase terminals that is connected to three phase network a, b, c of correspondence respectively; First capacitance current memory cell 221 in described the second memory cell 22, second capacitance current memory cell 222 and the 3rd capacitance current memory cell 223 be corresponding first capacitance current collecting unit 121 in second group of capacitance current collecting unit 12, second capacitance current collecting unit 122 and the 3rd capacitance current collecting unit 123 of being connected to respectively also; First capacitance current collecting unit 121, second capacitance current collecting unit 122 and the 3rd capacitance current collecting unit 123 be the corresponding three phase terminals that is connected to three phase network a, b, c respectively; Described first group of capacitance switch memory cell (214) is connected to first group of capacitance switch opening and closing state acquisition module 131; Described second group of capacitance switch memory cell 224 is connected to second group of capacitance switch opening and closing state acquisition module 132; Described first group of capacitance switch opening and closing state acquisition module 131 and second group of capacitance switch opening and closing state acquisition module 132 are connected to respectively capacitance switch K1 and K2 in corresponding three phase network a, b, c.
Described first group of electric capacity computing unit 231 is connected to the first memory cell 21 on the one hand, is connected on the other hand Executive Module 3; Second group of electric capacity computing unit 232 is connected to the second memory cell 22 on the one hand, is connected on the other hand Executive Module 3; Described performance element 3 is connected to the reactive compensation switch cabinet circuit breaker Q S in three phase network a, b, c.
The utility model when in use, as shown in Figure 1, by the current transformer in three phase network, first group of capacitance current collects in the first capacitance current collecting unit 111, the second capacitance current collecting unit 112 and the 3rd capacitance current collecting unit 113; Second group of capacitance current collects in first capacitance current collecting unit 121, second capacitance current collecting unit 122 and the 3rd capacitance current collecting unit 123; In first group and second group of collected first capacitance switch opening and closing state collecting unit 131 of capacitance switch opening and closing state signal and the second capacitance switch opening and closing state collecting unit 132.Collecting unit is delivered to the data that collect in corresponding the first memory cell 21 and the second memory cell 22.When capacitance switch opening and closing state memory cell, when namely in first group of capacitance switch memory cell 214 or second group of capacitance switch memory cell 224, state is separating brake, corresponding computing unit, namely first group of electric capacity computing unit 231 or second group of electric capacity computing unit 232 calculate respectively and compare with measurement electric current in the capacitance current memory cell, when measured current in memory cell is set current value in greater than computing unit, computing unit is judged this group electric capacity generation low current grounding, and sends action command to performance element 3.Performance element 3 sends the separating brake order to the circuit breaker Q S of system, and with the excision of capacitor group, isolation earth fault guarantees safe operation of electric network.
Two groups of any one group of generation low current groundings of electric capacity, protective device all can be sent out the separating brake instruction to decorum circuit breaker Q S, all electric capacity is excised.
This utility model is rational in infrastructure, and is practical, is beneficial to and applies.
Claims (4)
1.10kV capacitance reactive compensation device ground protection controller is characterized in that: the device of access three phase network when this protection controller is use, this protection controller comprises: signal acquisition module (1), central processing module (2) and Executive Module (3); Described central processing module (2) by connection to signal acquisition module (1) and Executive Module (3); Described signal acquisition module (1) and Executive Module (3) are connected to three phase network (a, b, c).
2. 10kV capacitance reactive compensation device ground protection controller according to claim 1 is characterized in that: described signal acquisition module (1) comprises for the capacitance current collecting unit (11) that gathers first group of three phase capacitance electric current, be used for gathering the capacitance current collecting unit (12) of second group of three phase capacitance electric current and the opening and closing state signal gathering unit (13) that is used for gathering first group and second group capacitance switch opening and closing state signal;
Described central processing module (2) comprises the second memory cell (22) and the computing unit (23) of the first memory cell (21), second group of capacitance current of storage and the capacitance switch opening and closing state of first group of capacitance current of storage and capacitance switch opening and closing state.
3. 10kV capacitance reactive compensation device ground protection controller according to claim 2, it is characterized in that: described first group of capacitance current collecting unit (11) comprises the first capacitance current collecting unit (111), the second capacitance current collecting unit (112) and the 3rd capacitance current collecting unit (113); Described second group of capacitance current collecting unit (12) comprises first capacitance current collecting unit (121), second capacitance current collecting unit (122) and the 3rd capacitance current collecting unit (123); Described capacitance switch opening and closing state collecting unit (13) comprises first group of capacitance switch opening and closing state acquisition module (131) and second group of capacitance switch opening and closing state acquisition module (132);
Described the first memory cell (21) comprises the first capacitance current memory cell (211), the second capacitance current memory cell (212), the 3rd capacitance current memory cell (213) and first group of capacitance switch memory cell (214); Described the second memory cell (22) comprises first capacitance current memory cell (221), second capacitance current memory cell (222), the 3rd capacitance current memory cell (223) and second group of capacitance switch memory cell (224); Described computing unit (23) comprises first group of electric capacity computing unit (231) and second group of electric capacity computing unit (232);
Described the first memory cell (21) is respectively by connection to the first group capacitance current collecting unit (11) and the first capacitance switch opening and closing state collecting unit (131); The second memory cell (22) is respectively by connection to the second group capacitance current collecting unit (12) and the second capacitance switch opening and closing state collecting unit (132); First group of capacitance current collecting unit (11), second group of capacitance current collecting unit (12) and divide-shut brake signal gathering unit (13) are connected to three phase network (a, b, c); Described computing unit (23) is connected to Executive Module (3).
4. 10kV capacitance reactive compensation device ground protection controller according to claim 3 is characterized in that: the first capacitance current memory cell (211), the second capacitance current memory cell (212) and the 3rd capacitance current memory cell (213) be corresponding the first capacitance current collecting unit (111), the second capacitance current collecting unit (112) and the 3rd capacitance current collecting unit (113) of being connected to respectively; The first capacitance current collecting unit (111), the second capacitance current collecting unit (112) and the 3rd capacitance current collecting unit (113) be the three phase terminals that is connected to three phase network (a, b, c) of correspondence respectively; First capacitance current memory cell (221) in described the second memory cell (22), second capacitance current memory cell (222) and the 3rd capacitance current memory cell (223) be corresponding first capacitance current collecting unit (121), second capacitance current collecting unit (122) and the 3rd the capacitance current collecting unit (123) that is connected in second group of capacitance current collecting unit (12) respectively also; First capacitance current collecting unit (121), second capacitance current collecting unit (122) and the 3rd capacitance current collecting unit (123) be the three phase terminals that is connected to three phase network (a, b, c) of correspondence respectively; Described first group of capacitance switch memory cell (214) is connected to first group of capacitance switch opening and closing state acquisition module (131); Described second group of capacitance switch memory cell (224) is connected to second group of capacitance switch opening and closing state acquisition module (132); Described first group of capacitance switch opening and closing state acquisition module (131) and second group of capacitance switch opening and closing state acquisition module (132) are connected to respectively in corresponding three phase network (a, b, c) capacitance switch (K1) and (K2);
Described first group of electric capacity computing unit (231) is connected to the first memory cell (21) on the one hand, is connected on the other hand Executive Module (3); Second group of electric capacity computing unit (232) is connected to the second memory cell (22) on the one hand, is connected on the other hand Executive Module (3); Described performance element (3) is connected to the reactive compensation switch cabinet circuit breaker (QS) in three phase network (a, b, c).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220281726 CN202940570U (en) | 2012-06-15 | 2012-06-15 | Grounding protection controller for 10kV capacitor reactive compensation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220281726 CN202940570U (en) | 2012-06-15 | 2012-06-15 | Grounding protection controller for 10kV capacitor reactive compensation device |
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| CN202940570U true CN202940570U (en) | 2013-05-15 |
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| CN 201220281726 Expired - Fee Related CN202940570U (en) | 2012-06-15 | 2012-06-15 | Grounding protection controller for 10kV capacitor reactive compensation device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606888A (en) * | 2013-11-22 | 2014-02-26 | 国家电网公司 | Reactive power compensation equipment circuit protecting method and device |
| CN103901300A (en) * | 2014-03-14 | 2014-07-02 | 重庆大学 | Switching operation test system of 10 kV parallel capacitor |
| CN112731065A (en) * | 2020-12-31 | 2021-04-30 | 上海宏力达信息技术股份有限公司 | Single-phase earth fault studying and judging method and system for ground reference transient characteristics |
-
2012
- 2012-06-15 CN CN 201220281726 patent/CN202940570U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606888A (en) * | 2013-11-22 | 2014-02-26 | 国家电网公司 | Reactive power compensation equipment circuit protecting method and device |
| CN103606888B (en) * | 2013-11-22 | 2016-04-13 | 国家电网公司 | Reactive apparatus loop protection method and device |
| CN103901300A (en) * | 2014-03-14 | 2014-07-02 | 重庆大学 | Switching operation test system of 10 kV parallel capacitor |
| CN112731065A (en) * | 2020-12-31 | 2021-04-30 | 上海宏力达信息技术股份有限公司 | Single-phase earth fault studying and judging method and system for ground reference transient characteristics |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20140615 |
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| EXPY | Termination of patent right or utility model |