CN201061150Y - Intelligent reactive compensation contactless routing switching mechanism - Google Patents
Intelligent reactive compensation contactless routing switching mechanism Download PDFInfo
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- CN201061150Y CN201061150Y CNU2007201085572U CN200720108557U CN201061150Y CN 201061150 Y CN201061150 Y CN 201061150Y CN U2007201085572 U CNU2007201085572 U CN U2007201085572U CN 200720108557 U CN200720108557 U CN 200720108557U CN 201061150 Y CN201061150 Y CN 201061150Y
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model relates to an intelligent reactive power compensation contactless route switched mechanism, belonging to technical field of reactive power compensation in power systems, which comprises a thyristor module, one or more groups of three phase split compensation or three phase general compensation modules, a CPU main control unit, an intelligent control circuit (12) and a plurality of relays for switching the thyristor module to undertake long-term operations. The utility model is characterized in that: the thyristor module is connected between the output bus and the route bus of the compensation modules, and the thyristor module and the CPU main control unit are connected with the input ends of the relays by means of the intelligent control circuit. The relays comprise a working relay and a route relay, the output end of working relay is connected with a self-healing low voltage capacitor and the output bus of the compensation modules, and the output end of route relay is connected with the a self-healing low voltage capacitor and the route bus. The utility model has the advantages of switching all the capacitors via a thyristor module, reducing the production costs, realizing the intelligentization and modularization, and extending the system at any time without the need of configuration anew.
Description
Technical field
The utility model belongs to the power system reactive power compensation technical field, is specifically related to the contactless route switching of a kind of intelligent reactive power compensation mechanism.
Background technology
Reactive power compensation increases reactive power by switching capacitance, adopt the contactor switching, in the input process, the initial voltage of capacitor group is zero, and is closing a floodgate moment, and line voltage is often non-vanishing again, the voltage that is added in capacitor group two ends is raise suddenly, produce very big inrush phenomenon, not only electrical network is impacted, and influence the useful life of capacitor.
In the prior art, adopt the contactor or the relay switching that are exclusively used in the capacitor group, suppress to shove by adding current-limiting resistance, contactor is when cutting out, not necessarily when current over-zero, turn-off, can produce arcing, can cause contactor or relay contact to damage gradually; Adopt thyristor switchable capacitor, operating passing zero can not produce arcing, but can produce harmonic current, and power consumption is big, and temperature rise is too high, and every capacitor adopts controllable silicon switching cost too high.
The switching device that China utility model patent CN2699558Y " switching device of power capacitor in the low-voltage reactive compensator capable " (open day is on May 11st, 2005) provides, comprise some contactors that a capacitor connects one to one, its inventive point is that increasing a contactor at each road power capacitor switches silicon controlled module, makes that a controllable silicon can be shared by all described some power capacitors.This technical scheme has prolonged the life-span of contactor preferably, eliminates the surge circuit, has reduced the use cost of silicon controlled module, but still has following defective:
(1) contactor is bulky, the cost height, and by the forceful electric power switching, security performance is not high;
(2) can't carry out analysis and judgement to the data of three-phase voltage, three-phase current and residual voltage, three-phase is carried out the independent compensation switching;
Summary of the invention
For overcoming the defective that cost height in the prior art, function singleness, switching operation can not intelligent monitorings, the purpose of this utility model provides a kind of low cost, advantage easy to use, that fully merge controllable silicon and relay makes capacitor switching reliable, and realizes the contactless route switching mechanism of intellectuality, modularization, microminiaturization.
The utility model realizes that above-mentioned purpose adopts following scheme:
A kind of intelligent reactive power compensation is contactless route switching mechanism is characterized in that comprising:
A silicon controlled module is used for by route switching and control bus all capacitors being realized switching; Divide complementary modulus piece or three-phase complementary modulus piece altogether with three-phase more than a group or a group, the three-phase that every group of three-phase divides complementary modulus piece or three-phase to comprise some shared silicon controlled module switchings controls altogether in the complementary modulus piece divides to be mended or three-phase is mended the self-healing low-voltage capacitor altogether;
CPU main control unit and intelligence control circuit and switching silicon controlled module are in order to bear the relay of long-term work;
Silicon controlled module is connected between compensating module output bus and the route bus, silicon controlled module, CPU main control unit connect the input of relay by intelligence control circuit, described relay comprises working relay and route relay, the output of working relay connects self-healing low-voltage capacitor and compensating module output bus, and the output of route relay connects self-healing low-voltage capacitor and route bus.
Intelligent contactless route switching of the present utility model mechanism, be installed in the module of modularization intelligent reactive power compensator, one cover silicon controlled module and controllable silicon trigger module can be mended or three-phase branch benefit capacitor realization switching all three-phases in installing altogether by route switching and control bus and an every working relay, route relay coordinated that capacitor is corresponding.
Further, described three-phase divides complementary modulus piece or the common complementary modulus piece of three-phase to be parallel between compensating module output bus and the route bus, silicon controlled module and intelligent output control circuit can be installed in the one module and become primary module, and the CPU main control unit of primary module is connected by control bus with the CPU of other module.Switching of the present utility model mechanism can be by reactive power compensation primary module centralized control, three-phase divides complementary modulus piece and three-phase complementary modulus piece decentralized control altogether, silicon controlled module is by the reactive power compensation primary module, three-phase divides complementary modulus piece and the three-phase route bus of complementary modulus piece altogether, with all route relays in the modularization intelligent reactive power compensator, working relay is connected with capacitor, use all self-healing low-voltage capacitors of cover silicon controlled module may command, the three-phase that will need easily to control divides complementary modulus piece or the common complementary modulus piece parallel connection of three-phase to enter and can realize
Further described intelligent output control circuit comprises signal amplification circuit, data storing chip and sample circuit, A/D conversion chip, signal conditioning circuit, silicon controlled module and relay by holding wire connect signal amplification circuit, the data storing chip meets CPU, the sample circuit of described primary module connects the input that A/D conversion chip and signal conditioning circuit insert CPU.
Further, silicon controlled module comprises controllable silicon trigger module and controllable silicon switching module, and controllable silicon switching module is parallel between reactive power compensation output bus and the route bus, and control end connects intelligent output control circuit by the controllable silicon trigger module.
The utility model operation principle is: the controllable silicon trigger module is connected the CPU main control unit with relay by signal line passes signal amplification circuit, pin-saving chip, and the data that reactive power compensation primary module sample circuit is gathered three-phase voltage, three-phase current, zero-sequence current and residual voltage transmit signal to the CPU analyzing and processing through A/D conversion chip, signal conditioning circuit; Judge after the CPU analyzing and processing and send instruction when needing input or excision self healing capacitor, the order of capacitor switching sends to relay and silicon controlled module through pin-saving chip, signal amplification circuit, route relay and silicon controlled module also connect, when providing path and anode voltage to make it to receive the silicon controlled module triggering signal for silicon controlled module, the route relay closes realizes conducting, the controllable silicon trigger module detects zero crossing, send pulse triggering signal, make silicon controlled module conducting when voltage zero-cross, turn-off during current over-zero.After the silicon controlled module conducting, capacitor drops into reactive power compensation, and the working relay of the capacitor correspondence that has dropped into is closed again, and last silicon controlled module turn-offs when zero current, and by the working relay long-term work, the route relay disconnects again;
Excision is during capacitor, the route relay closes, and conducting during the silicon controlled module no-voltage disconnects working relay, turn-offs during the silicon controlled module zero current then, and reactive power compensation is withdrawed from the capacitor excision, and last route relay disconnects.
During capacitor switching in the control compensation module, order sends to corresponding compensating module through the communication chip of primary module through the control bus interface, compensating module sends signal to CPU by the control bus interface through communication chip, handle by analysis, the order of the capacitor switching in the control compensation module sends to relay through pin-saving chip, signal amplification circuit.The controllable silicon of primary module control simultaneously trigger module sends triggering signal, and the route relay that silicon controlled module is corresponding with the capacitor that needs switching, working relay are worked in coordination with and finished switching, and the switching process is identical with primary module capacitor switching process.
Switching of the present utility model mechanism adopts the silicon controlled module conducting in capacitor switching moment, and long-term work is born by working relay, and working relay both can adopt to exchange also with route relay working power and can adopt direct current.
The reactive compensation switching mechanism of the utility model in compared to existing technology compares, and its beneficial effect is:
(1) one cover silicon controlled module by the route bus can switching modularization intelligent reactive power compensator in all capacitors, be blended in reactive power compensation primary module, reactive compensation module, realize intellectuality, modularization.
(2) the utility model makes full use of controllable silicon no-flashy-flow, shock-resistant, operating passing zero and relay device do not generate heat, leakage current, loss-free advantage, avoid controllable silicon to work long hours and generate heat seriously, produce harmonic wave and the flimsy shortcoming in relay switching moment contact, make the intelligent reactive power compensation system can long-term work and do not break down, realize the reliable switching of electric capacity.
(3) one cover contactless throw-in and throw-off mechanisms can back-up system dilatation at any time and need not reconfigure.
(4) use relay, reactive compensation system is able to reliable control, has reduced production cost simultaneously, and the reactive compensation module volume reduces the realization microminiaturization.
Description of drawings
Fig. 1 comprises primary module and the three-phase circuit theory diagrams of complementary modulus piece altogether for the utility model;
Fig. 2 is the intelligence control circuit schematic diagram of Fig. 1;
Fig. 3 is a circuit theory simplified schematic diagram of the present utility model;
Fig. 4 divides the circuit theory diagrams of complementary modulus piece for the utility model comprises primary module and three-phase.
Embodiment
Below in conjunction with accompanying drawing technical solutions of the utility model are further described.
The contactless route switching of intelligent reactive power compensation mechanism as Fig. 1～the utility model application shown in Figure 4.
Comprise silicon controlled module 10, CPU main control unit and intelligence control circuit 12, route relay and working relay and self-healing low-voltage capacitor.
Silicon controlled module 10 is used for switching with control bus by route realizes switching to all capacitors, and switching mechanism can comprise one group or one group of above three-phase and divide complementary modulus piece 2 or three-phase complementary modulus piece 3 altogether.Fig. 1 divides complementary modulus piece 3 for primary module 1 and three-phase; Fig. 3 divides complementary modulus piece 2 and three-phase complementary modulus piece 3 altogether for including primary module, three-phase, and Fig. 4 comprises two three-phases complementary modulus piece altogether, and one is the primary module that comprises intelligence control circuit, and silicon controlled module is wherein integrated.Can as required some three-phases be divided complementary modulus piece or three-phase to be total to the complementary modulus piece and be connected in parallel between compensating module output bus A, B, C, N and route bus A2, B2, the C2, its CPU can be connected with the CPU main control unit of primary module by control bus.
Every group of three-phase divides the three-phase that comprises some shared silicon controlled module 10 switchings controls in complementary modulus piece or the common complementary modulus piece of three-phase to divide benefit or three-phase to mend the self-healing low-voltage capacitor altogether.Silicon controlled module comprises controllable silicon trigger module 104 and controllable silicon switching module 108, and controllable silicon switching module 108 is parallel between reactive power compensation output bus and the route bus, and control end connects intelligent output control circuit 12 by controllable silicon trigger module 104.
See Fig. 2, intelligence output control circuit 12 comprises signal amplification circuit 116, data storing chip 118 and sample circuit 123, A/D conversion chip 122, signal conditioning circuit 121, silicon controlled module and relay by holding wire connect signal amplification circuit 116, data storing chip 118 meets CPU120, the sample circuit of primary module 1 connects the input of A/D conversion chip 122 and signal conditioning circuit 121 access CPU, and controllable silicon trigger module 104 is connected CPU main control unit 120 with relay by signal line passes signal amplification circuit 116, pin-saving chip 118.
Fig. 1, among Fig. 3, three-phase divides complementary modulus piece 2 to comprise control bus interface 208, communication chip 222, CPU221, and pin-saving chip 220, signal amplification circuit 219, route relay 210, three working relays 211,212,213 and three-phase divide mends capacitor 214.
CPU221 output connects signal amplification circuit 219 and pin-saving chip 220, and electrical equipment 210,211,212,213 is succeeded in the output of signal amplification circuit 21, and every three-phase divides the benefit capacitor to be connected with a route relay, three working relays.Three-phase divides benefit capacitor 214A, B, C phase output terminal to connect route relay 210 and working relay 211,212,213, N line output connecting to neutral line N.
An other termination route bus of route relay 210, an other end of three working relays 211,212,213 is connected to compensation output bus by circuit breaker 209, CPU221 is connected with the CPU120 of primary module with control bus interface 208 by communication chip 222, want the switching three-phase to divide and mend capacitor 214, the output command of the CPU120 of primary module sends to three-phase from communication chip 119 through control bus interface 129 and divides complementary modulus piece 2, sends CPU221 to by bus interface 208 and communication chip 222.
Fig. 1, among Fig. 3 and Fig. 4, three-phase complementary modulus piece 3 altogether comprises circuit breaker 307, pin-saving chip 319, signal amplification circuit 318, CPU320 and four relays, and two three-phases are mended capacitor 312,313 altogether.The output of CPU320 is through storage chip 319 and signal amplification circuit 318, signal amplification circuit 318 connects two group relaies, every three-phase is mended capacitor altogether and is connected with a working relay, a route relay, three-phase is mended capacitor 312 altogether and is connect working relay 308 and route relay 309, and three-phase is mended capacitor 313 altogether and connect working relay 310 and route relay 311.Another of working relay 308 and working relay 310 connects compensation output bus, another termination route bus of route relay 309 and route relay 311 by circuit breaker 307.
CPU320 is connected with the CPU120 of primary module with control bus interface 322 by communication chip 321, want the switching three-phase to mend capacitor 312 altogether, 313 o'clock, the output command of primary module CPU120 sends to three-phase complementary modulus piece 3 altogether from communication chip 119 through control bus interface 129, send CPU221 to by bus interface 322 and communication chip 321, handle by analysis, three-phase is total to the order process pin-saving chip 319 of complementary modulus piece with switched capacitor, signal amplification circuit 318 sends to corresponding working relay and route relay, and collaborative silicon controlled module cooperates the switching three-phase to mend capacitor altogether.
The utility model switching process is: the data that reactive power compensation primary module 1 is gathered three-phase voltage, three-phase current, zero-sequence current and residual voltage transmit signal to the CPU120 analyzing and processing through sample circuit 123, A/D conversion chip 122, signal conditioning circuit 121; Judge after the CPU120 analyzing and processing and send instruction when needing input or excision self healing capacitor.
When wanting the capacitor of switching reactive power compensation primary module, order is through pin-saving chip 118, Darlington transistor 117, signal amplification circuit 116 sends to controllable silicon trigger module 104 and route relay 111 or 113, when providing path and anode voltage to make it to receive controllable silicon trigger module 104 triggering signals for silicon controlled module 108, route relay 111 or 113 closures realize conducting, after receiving the switching order, controllable silicon trigger module 104 detects zero crossing, send pulse triggering signal, make the conducting when voltage zero-cross of controllable silicon switching module 108, capacitor 114 or 115 drops into reactive power compensation, the working relay 110 of the capacitor correspondence that has dropped into or 112 closure under CPU control, controllable silicon switching module 108 is turn-offed when zero current then, by working relay 110 or 112 long-term works, route relay 111 or 113 disconnects at last;
During the excision capacitor, order is through pin-saving chip 118, Darlington transistor 117, signal amplification circuit 116 sends to controllable silicon trigger module 104 and corresponding route relay 111 or 113, when making silicon controlled module 108 receive controllable silicon trigger module 104 triggering signals, route relay 111 or 113 closures realize conducting, controllable silicon trigger module 104 detects zero crossing, send pulse triggering signal, make the conducting when voltage zero-cross of controllable silicon switching module 108, the corresponding working relay 110 that has dropped into of CPU control or 112 disconnects, controllable silicon switching module 108 is turn-offed when zero current then, with capacitor 114 or 115 excisions, withdraw from reactive power compensation, route relay 111 or 113 disconnects at last.
When wanting the switching three-phase to divide the capacitor of complementary modulus piece 2, order divides complementary modulus piece 2 through the communication chip 119 of reactive power compensation primary module 1 through the three-phase that control bus interface 129 sends to correspondence, CPU221 when three-phase divides complementary modulus piece 2 to send to through communication chip 222 by control bus interface 208, handle by analysis, three-phase is total to the order process pin-saving chip 220 of complementary modulus piece with switched capacitor, signal amplification circuit 219 sends to corresponding relay 210,211,212,213, three-phase divides the complementary modulus piece to adopt the phase splitting compensation shunt capacitor, with a route relay 210, three working relays 211,212,213 connect, the switching process is consistent with reactive power compensation primary module capacitor switching mode, capacitor switching moment employing silicon controlled module, working relay is adopted in long-term work.
When wanting the switching three-phase to be total to the capacitor of complementary modulus piece 3, order sends to corresponding three-phase complementary modulus piece 3 altogether through the communication chip 119 of reactive power compensation primary module 1 through control bus interface 129, three-phase divides complementary modulus piece 3 to send CPU320 by control bus interface 322 to through communication chip 321, handle by analysis, the common complementary modulus piece of three-phase sends to corresponding power relay 308,309,310,311 with the order of switched capacitor through pin-saving chip 319, signal amplification circuit 318, and the switching process is consistent with reactive power compensation primary module capacitor switching mode.
Claims (4)
1. the contactless route switching of intelligent reactive power compensation mechanism is characterized in that comprising:
A silicon controlled module (10) is used for by route switching and control bus all capacitors being realized switching; Divide complementary modulus piece or three-phase complementary modulus piece altogether with three-phase more than a group or a group, the three-phase that every group of three-phase divides complementary modulus piece or three-phase to comprise the control of some shared silicon controlled modules (10) switching altogether in the complementary modulus piece divides to be mended or three-phase is mended the self-healing low-voltage capacitor altogether;
CPU main control unit and intelligence control circuit (12) and switching silicon controlled module are in order to bear the relay of long-term work;
Silicon controlled module is connected between compensating module output bus and the route bus, silicon controlled module, CPU main control unit connect the input of relay by intelligence control circuit, described relay comprises working relay and route relay, the output of working relay connects self-healing low-voltage capacitor and compensating module output bus, and the output of route relay connects self-healing low-voltage capacitor and route bus.
2. the contactless route switching of intelligent reactive power compensation mechanism according to claim 1, it is characterized in that described three-phase divides complementary modulus piece or three-phase to be total to the complementary modulus piece and is parallel between compensating module output bus and the route bus, silicon controlled module (10) and intelligent output control circuit (12) can be arranged in the one module and become primary module, and the CPU main control unit of primary module is connected by control bus with the CPU of other module.
3. the contactless route switching of intelligent reactive power compensation mechanism as claimed in claim 1 or 2, it is characterized in that described intelligent output control circuit (12) comprises signal amplification circuit (116), data storing chip (118) and sample circuit (123), A/D conversion chip (122), signal conditioning circuit (121), silicon controlled module and relay by holding wire connect signal amplification circuit (116), data storing chip (118) meets CPU, the sample circuit of described primary module connects the input of A/D conversion chip (122) and signal conditioning circuit (121) access CPU.
4. the contactless route switching of intelligent reactive power compensation mechanism as claimed in claim 1 or 2, it is characterized in that silicon controlled module comprises controllable silicon trigger module (104) and controllable silicon switching module (108), controllable silicon switching module (108) is parallel between reactive power compensation output bus and the route bus, and output connects intelligent output control circuit (12) by controllable silicon trigger module (104).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201085572U CN201061150Y (en) | 2007-04-23 | 2007-04-23 | Intelligent reactive compensation contactless routing switching mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201085572U CN201061150Y (en) | 2007-04-23 | 2007-04-23 | Intelligent reactive compensation contactless routing switching mechanism |
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| CN201061150Y true CN201061150Y (en) | 2008-05-14 |
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| CNU2007201085572U Expired - Fee Related CN201061150Y (en) | 2007-04-23 | 2007-04-23 | Intelligent reactive compensation contactless routing switching mechanism |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001232A (en) * | 2011-09-28 | 2013-03-27 | 山西润世华电力科技有限公司 | Low-voltage reactive compensation independent switch control system |
| CN103701137A (en) * | 2013-12-23 | 2014-04-02 | 南宁广开电气有限责任公司 | Low voltage dynamic reactive power compensation device |
| CN105529682A (en) * | 2016-03-08 | 2016-04-27 | 宁波高新区鼎诺电气有限公司 | Zero-sequence protection circuit and system applying same |
| CN107039989A (en) * | 2017-05-22 | 2017-08-11 | 龙岩学院 | The new fling-cut switch of secondary capacitor |
-
2007
- 2007-04-23 CN CNU2007201085572U patent/CN201061150Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001232A (en) * | 2011-09-28 | 2013-03-27 | 山西润世华电力科技有限公司 | Low-voltage reactive compensation independent switch control system |
| CN103701137A (en) * | 2013-12-23 | 2014-04-02 | 南宁广开电气有限责任公司 | Low voltage dynamic reactive power compensation device |
| CN105529682A (en) * | 2016-03-08 | 2016-04-27 | 宁波高新区鼎诺电气有限公司 | Zero-sequence protection circuit and system applying same |
| CN107039989A (en) * | 2017-05-22 | 2017-08-11 | 龙岩学院 | The new fling-cut switch of secondary capacitor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080514 Termination date: 20100423 |