CN203243056U - High/middle-voltage reactive compensation composite structure - Google Patents
High/middle-voltage reactive compensation composite structure Download PDFInfo
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- CN203243056U CN203243056U CN 201320308233 CN201320308233U CN203243056U CN 203243056 U CN203243056 U CN 203243056U CN 201320308233 CN201320308233 CN 201320308233 CN 201320308233 U CN201320308233 U CN 201320308233U CN 203243056 U CN203243056 U CN 203243056U
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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
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- 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 is a high/middle-voltage reactive compensation composite structure comprising a reactor body, a magnetic control box, a fixed capacitor bank and a controller. The controller comprises a dual-CPU module, a signal sampling and synchronizing module, a trigger feedback module and a power module. The trigger feedback module is connected with windings inside the reactor body through a circuit in the magnetic control box and is connected with the dual-CPU module; an input end of the fixed capacitor bank is connected with a wire incoming power supply of a substation through a current transformer, an output end of the fixed capacitor bank is connected with a wire outgoing load of the substation through a voltage transformer, and the output end of the fixed capacitor bank is connected with the windings inside the reactor body through a circuit breaker; and a signal input end of the signal sampling and synchronizing module is connected with the voltage transformer and the current transformer, and a signal output end of the signal sampling and synchronizing module is connected with the dual-CPU module. According to the utility model, performance defects of an existing static reactive compensation device can be overcome, and reactive power required by a power grid can be quickly provided.
Description
Technical field
The utility model belongs to the device for transformer field, specifically a kind ofly in the electric power system relates to the mesohigh reactive power compensation composite construction that magnet controlled reactor is combined with the fixed capacity group.The renovation technique that belongs to mesohigh reactive power compensation composite construction.
Background technology
Along with the raising of country to the attention degree of intelligent grid, more and more higher to the requirement of reactive power compensator in the industry.The upsurge of the UHV transmission that starts in recent years and wind-powered electricity generation construction also makes high performance idle free device seem more important.
Be the high-voltage shunt reactor of traditional blocked impedance type or be the requirement that static passive compensation device (TCR, TSC) all is difficult to satisfy intelligent grid.Novel static passive compensation device magnet controlled reactor (MCR) has very superior control performance, MCR changes the size of D.C. magnetic biasing by the trigger angle that changes thyristor, thereby change the saturation of magnet valve, and then the change reactance value reaches the idle output of smooth adjustment, be combined with the fixed capacitor group, can the required reactive power of Quick power supply network, voltage support dynamically is provided, the runnability of improvement system has very large potentiality at the aspects such as function that improve electric network reliability and optimization operation of power networks situation.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of control reliable, flexible, quick, satisfies the mesohigh reactive power compensation composite construction continuous to reactive compensation power, that smooth adjustment requires.
The utility model achieves the above object by the following technical programs: mesohigh reactive power compensation composite construction of the present utility model, include the reactor body, the magnetic control case, fixed capacitor group and controller, its middle controller includes two CPU modules, sampling and synchronizing signal module, trigger feedback module, power module, wherein triggering feedback module is connected with the intrinsic winding of reactor by the circuit in the magnetic control case, triggering feedback module is connected with two CPU modules, the input of fixed capacitor group is connected with the transforming plant lead-in power supply by current transformer, the output of fixed capacitor group goes out specific electric load by voltage transformer with transformer station and is connected, and the output of fixed capacitor group is connected by the intrinsic winding of circuit breaker and reactor, the signal input part of sampling and synchronizing signal module is connected with voltage transformer and current transformer, the signal output part of sampling and synchronizing signal module is connected with two CPU modules, and power module is connected with two CPU modules.
2 core limbs and 4 common windings are housed in the above-mentioned reactor body; 2 core limbs are distinguished the first core limb and the second core limb; 2 core limbs are wound with respectively two groups of single-column windings; 2 core limbs around the single-column winding be above-mentioned said 4 groups of common windings; the winding of extraction 3% is as the DC control winding from the common winding of two offsides; these two DC control windings be respectively from the first core limb the one 3% tap windings around one of them common winding, extracted out and from the second core limb the two 3% tap windings around one of them common winding, extracted out; the first rc protection circuit is housed in the magnetic control case; the second rc protection circuit; fly-wheel diode; piezo-resistance; fuse; the first thyristor; the second thyristor; single phase alternating current power supply; wherein fly-wheel diode is connected with fuse; piezo-resistance is in parallel with above-mentioned series circuit; one end of piezo-resistance links to each other with the two 3% tap windings; the other end of piezo-resistance links to each other with the negative electrode of the first thyristor; the first thyristor and the second thyristor consist of the common cathode structure; the two ends of the second thyristor also connect the second resistance-capacitance protection loop; the anode of the second thyristor links to each other with the two 3% tap windings; the negative electrode of the second thyristor links to each other around another common winding with the second core limb; the two ends of the first thyristor also connect the first rc protection circuit; the anode of the first thyristor links to each other with the one 3% tap windings, and the negative electrode of the first thyristor links to each other around another common winding with the first core limb.
The beneficial effect of high-pressure reactive compensation composite construction of the present utility model is the deficiency of avoiding existing static passive compensation device, the reactive power that the smooth adjustment reactance value obtains lagging behind, be combined with the fixed capacitor group, the reactive power that the Quick power supply network is required, voltage support dynamically is provided, the runnability of improvement system improves electric network reliability and stability, optimizes the operation of power networks situation.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Accompanying drawing 1 is typical wiring mode schematic diagram of the present utility model.
Accompanying drawing 2 is the schematic diagram of reactor body and magnetic control case inside.
Accompanying drawing 3 is the circuit theory diagrams of sampling and synchronizing signal module.
Accompanying drawing 4 is for triggering the circuit theory diagrams of feedback module.
Accompanying drawing 5 is the schematic diagram of liquid crystal interface monitor supervision platform.
Accompanying drawing 6 is the schematic diagram of PC rights management unit users log-in interface.
Accompanying drawing 7 is the schematic diagram of PC interface monitor supervision platform.
Accompanying drawing 8 is the circuit theory diagrams of power module.
Among the figure: 1. reactor body, 2. capacitor group, 3. magnetic control case; 4. voltage transformer, 5. current transformer, 6. the second resistance-capacitance protection loop; 7. the two 3% tap windings; 8. fly-wheel diode, 9. piezo-resistance, 10. fuse; 11. the first core limb; 12. the first thyristor, 13. single phase alternating current power supplies, 14. secondary voltage instrument transformers; 15. TVS protective circuit and filter circuit; 16. direct voltage lifting circuit, 17. overvoltage crowbars, 18. phase compensating circuits; 19. zero cross detection circuit; 20. triode, 21. pulse transformers, 22. trigger impulse integer circuit; 23. photoelectric coupling; 24. voltage comparator circuit, 25. bridge rectifiers, 26. two-stage PT; 27. power-down protection circuit; 28. level shifting circuit, 29. power supply indicators, thyristor 29; the second core limb 30; the one 3% tap windings 31; the first resistance-capacitance protection loop 32.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is typical wiring figure of the present utility model.Winding and capacitor group 2 in the reactor body 1 all are connected on transformer station or the station service bus, and the capacity of reactor generally is designed to half of capacity of capacitor group.When transformer station's load variations was larger, the switching by electric capacity can change the capacitive reactive power that injects electrical network, but the electric capacity both end voltage can not suddenly change, and therefore can only can not steplessly control capacitor switching, and the capacitive reactive power of injected system is to have level idle.
Magnet controlled reactor can remedy the deficiency of capacitor group 2; in the present embodiment; magnet controlled reactor is that three-phase six thyristors move simultaneously; Fig. 2 only lists single-phase reactor body 1 and the inside schematic diagram of magnetic control case 3; in the present embodiment; reactor body 1 is single-phase magnet controlled reactor body; magnetic control case 3 is single-phase magnetic control case; 2 core limbs and 4 common windings are equipped with in reactor body 1 inside; 2 core limbs are distinguished the first core limb 11 and the second core limb 30; 2 core limbs are wound with respectively two groups of single-column windings; 2 core limbs around the single-column winding be above-mentioned said 4 groups of common windings; the winding of extraction 3% is as the DC control winding from the common winding of two offsides; these two DC control windings be respectively from the first core limb 11 the one 3% tap windings 31 around one of them common winding, extracted out and from the second core limb 30 the two 3% tap windings 7 around one of them common winding, extracted out; the first rc protection circuit 32 is housed in the magnetic control case; the second rc protection circuit 6; fly-wheel diode 8; piezo-resistance 9; fuse 10; the first thyristor 12; the second thyristor 29; single phase alternating current power supply 13; wherein fly-wheel diode 8 is connected with fuse 10; piezo-resistance 9 is in parallel with above-mentioned series circuit; one end of piezo-resistance 9 links to each other with the two 3% tap windings 7; the other end of piezo-resistance 9 links to each other with the negative electrode of the first thyristor 12; the first thyristor 12 and the second thyristor 29 consist of the common cathode structure; the two ends of the second thyristor 29 also connect the second resistance-capacitance protection loop 6; the anode of the second thyristor 29 links to each other with the two 3% tap windings 7; the negative electrode of the second thyristor 29 and the second core limb 30 link to each other around another common winding; the two ends of the first thyristor 12 also connect the first rc protection circuit 32; the anode of the first thyristor 12 links to each other with the one 3% tap windings 31, the negative electrode of the first thyristor 12 and the first core limb 11 link to each other around another common winding.
Above-mentioned magnetic control case 3 separates with reactor body 1.The size of the direct current of rectification circuit that can be by changing the one 3% tap windings 31, the conducting of controlling the first thyristor 12 with close, and the size of this direct current can change the degree of saturation of single-column winding and the first core limb 11 place's magnet valves, thereby change the lagging reactive power of injected system, the perceptual idle part capacitive reactive power of having offset electric capacity of inductance, thereby improve the operation of power networks situation, improve system reliability.For preventing the first thyristor 12 two ends voltage that withstands shocks, the first resistance-capacitance protection loop 32 in parallel at the first thyristor 12 two ends is to protect the first thyristor 12.In the break-make moment of the first thyristor 12, increase fly-wheel diode 8 and can increase change of current speed; Piezo-resistance 9 and fuse 10 can protect fly-wheel diode 8 not to be subjected to the impact of two ends surge voltage.The principle of above-mentioned the second thyristor 29 and the second rc protection circuit 6 is identical with the principle in the first thyristor 12 and the first resistance-capacitance protection loop 32.
As shown in Figure 4, the control of the first thyristor 12 realized by low-pressure side controller triggering drive circuit; For the convenient operating condition that obtains circuit, increase the thyristor feedback loop, to detect the conduction status of the first thyristor 12.
The sampling module of controller is the measurement to electrical network and reactor electric parameters, and high voltage is by voltage transformer 4 and secondary voltage instrument transformer 14 access sampling circuit boards, and the Acquisition Circuit of large electric current is similar to the high voltage Acquisition Circuit.These electric parameters comprise the switching values such as the analog quantitys such as voltage, electric current, frequency and temperature, pressure, gas.From the voltage sample loop, draw branch, detect zero crossing and produce the square wave synchronizing signal, for the accurate control of Trigger Angle provides phase reference.When detecting system or body interior fault, drive the tripping operation of circuit breaker by relay output, with protection reactor equipment.
Each module of controller is described as follows:
The controller internal frame diagram as shown in Figure 1, two CPU modules include arm processor and DSP digital processing element, arm processor directly links to each other by UART with the DSP digital processing element, pass mutually data, arm processor and DSP digital processing element directly drive liquid crystal display, and it is mutual to carry out man-machine interface by RS232 communication unit and computer, realizes real-time remote monitoring.
Two CPU modules are extremely important nucleus modules in the utility model, and whether its power supply stablizes the reliability that directly affects native system.DSP digital processing element and arm processor unit all possess power-down protection.Power through Switching Power Supply by station service during normal operation, when the external power source fault, transfer the internal battery power supply to, improved this reliability of structure.
In addition, above-mentioned pair of CPU module comprises outside DSP digital processing element, the arm processor unit, also includes communication unit, power supply power-fail protected location, level conversion unit, accident Alarm Unit.
Level conversion unit comprises two parts: the serial ports output level is converted to Transistor-Transistor Logic level commonly used and the used level of sampling circuit direct voltage lifting.Because computer serial ports output voltage up to 12V, must carry out level conversion.And the DSP digital processing unit can only gather 0 ~ 5V current potential, so this module also needs the DC level of lifting voltage.
The accident Alarm Unit is when the system failure, and arm processor can drive buzzer by amplifying circuit and carry out alarm, and output switching signal excises reactor simultaneously.
Fig. 3 is the schematic diagram of sampling and synchronizing signal module; include secondary voltage instrument transformer 14, TVS protective circuit and filter circuit 15, direct voltage lifting circuit 16, overvoltage crowbar 17, phase compensating circuit 18, zero cross detection circuit 19; secondary voltage instrument transformer 14 primary sides are connected to the 100V alternating current after the step-down, and secondary side is TVS protective circuit and filter circuit 15.Voltage signal is connected to the inverting input of amplifier through direct current lifting circuit 16, be connected to thereafter the reverse input end of next stage amplifier to reduce its phase place.Signal is connected to overvoltage crowbar 17 before entering DSP, and overvoltage crowbar 17 is the diode forward series circuit, plays the amplitude limit effect, guarantees to enter the voltage of DSP in allowed band.
For the synchronizing signal module, because TVS protective circuit and filter circuit 15 can affect the phase place before and after the signal, therefore increase phase compensating circuit 18, finally by the phase reference of crossing zero cross detection circuit 19 generation Trigger Angles.Send the DSP digital processing element to behind three tunnel busbar voltages of sampling and the collection of synchronizing signal module, three road bus currents, No. three reactor output currents.
Temperature, pressure, light gas and heavy gas four-way switch amount obtain from the reactor attaching device, are sent to the DSP digital processing element.Calculate active power, reactive power, power factor by processor at last, transfer to liquid crystal and PC interface display together with above sampling parameter.
Above-mentioned sampling and synchronizing signal module possess remote measurement, remote signaling function, and three tunnel busbar voltages, three road bus currents, No. three reactor output currents nine tunnel analog quantitys and temperature, pressure, light gas and heavy gas four-way switch amount are sampled.
Comparison module is realized the calibration of busbar voltage phase place Uab and Trigger Angle fixed phase synchronously.This module possesses zero passage detection, phase compensation function, can eliminate because the intrinsic error that hardware brings obtains accurately fixed phase by the square wave circuit for generating, and synchronizing signal is sent into the DSP digital processing element, for accurate Based Intelligent Control provides the basis.
Trigger the schematic diagram of feedback module as shown in Figure 4, include triode 20, pulse transformer 21, trigger impulse integer circuit 22, photoelectric coupling circuit 23, voltage comparator circuit 24, bridge rectifier 25, two-stage PT26 include trigger drive unit and detect feedback unit.
For trigger drive unit: the DSP digital processing element through synchronously relatively after, send triggering signal, be converted to light signal through photoelectric coupling circuit 23, pass through Optical Fiber Transmission, the end of picking of magnetic control case 3 is converted to the signal of telecommunication with light signal, form amplifying circuit by triode 20 and pulse transformer 21, connect the first thyristor 12 and trigger, change the reactance value of reactor.Trigger impulse integer circuit 22 can pulse transformer the direct voltage of 21 outputs carry out the waveform integer, increase the trigger impulse steepness, make the first more quickly conducting of thyristor 12.Then repeat the system power voltage signal acquisition, and then automatically change the first thyristor 12 Trigger Angles, thereby realized the closed-loop control that MCR controls.The control principle of the second thyristor 29 is identical with the control principle of the first thyristor 12.
For detecting feedback unit: the anode of the first thyristor 12 and negative electrode are connected to the input of testing circuit, the high pressure at two ends is by after two-stage PT 26 step-downs, obtaining high-low level through bridge rectifier 25, judge the first thyristor 12 whether normally or cut-off through voltage comparator circuit 24, feed back to the DSP digital processing element by photoelectric coupling circuit 23 at last, and note the real-time status of the first thyristor 12 in the PC interface display with the prompting operations staff.The control principle of the second thyristor 29 is identical with the control principle of the first thyristor 12.
Above-mentioned triggering feedback module is at driving and the detection of thyristor, and the utility model adopts photoelectric coupling to realize isolation of strong current and weak current, prevents that overvoltage is to the impact of circuit board.Triggering is simple in structure with feedback loop, and reliability is very high.
This module adopts pulse transforming to trigger, the pulse transformer fast response time, and antijamming capability is strong; Leakage inductance is little, has guaranteed better output pulse waveform; Driving power is large, and isolation is strong, and performance is good, and the simple and reliable property of circuit height is easy to use.Under the higher environment of electric pressure, for detecting the actual conducting situation of thyristor, increase the thyristor feedback module.
Fig. 5 is the schematic diagram of user authority management unit, and this unit possesses the function of password authentification, password modification.
Fig. 6 and Fig. 7 are respectively the schematic diagrames of liquid crystal interface and PC interface alternation module.Can realize that data show in real time, the function such as control, parameter modification, the inquiry of database, fault are recollected, and on RS485 bus carrier, mutually send data or instruction to comprehensive automation system of transformer substation by communication unit.
For liquid crystal cells: the DSP digital processing unit, drives liquid crystal display and carries out monitoring and the control of real-time running state and data as intermediate link with arm processor.The function of liquid crystal specifically to the startup of MCR, stop, unloaded, the automatically control of operation, each state of manual triggers, and three-phase bus electric current, voltage, frequency, active power, reactive power, power factor, reactor output current monitored.
For the PC boundary element: the DSP digital processing unit is by serial ports and the communication of hommization PC interface alternation, man-machine interface is by C++ builder software development, except the repertoire that possesses liquid crystal, also be connected with powerful Database Systems, other establishes operations staff's rights management function, real time data waveform Presentation Function, failure wave-recording function, PT and CT modify feature.
Liquid crystal interface of the present utility model and PC interface human-computer interaction module can be realized the people-oriented interaction function, possess remote signalling, remote measurement, remote control unit, and be reliable, easy to operate.Be provided with the user authority management function, can improve Security of the system.
Power module includes power-down protection circuit 27, level shifting circuit 28, power supply indicator 29, and wherein power-down protection circuit 27 adopts power down protection chip IC L7673, and this chip is external power source and button cell automatic switchover chip; Level shifting circuit 28 adopts pressurizer AMS1117, and pressurizer AMS1117 is level transferring chip; When level conversion was smooth, power supply indicator 29 was bright, represented the processor power supply normal.The thyristor driver plate is installed in the high-pressure magnetic case, and its required direct current passes through the single-column winding alternating voltage of extraction 3% through the power taking of voltage transformer connecting valve power supply.Power module supply power mode of the present utility model is flexible: the required direct current of controller by Switching Power Supply from the station service power taking.
Claims (7)
1. mesohigh reactive power compensation composite construction, it is characterized in that including the reactor body, the magnetic control case, fixed capacitor group and controller, its middle controller includes two CPU modules, sampling and synchronizing signal module, trigger feedback module, power module, wherein triggering feedback module is connected with the intrinsic winding of reactor by the circuit in the magnetic control case, triggering feedback module is connected with two CPU modules, the input of fixed capacitor group is connected with the transforming plant lead-in power supply by current transformer, the output of fixed capacitor group goes out specific electric load by voltage transformer with transformer station and is connected, and the output of fixed capacitor group is connected by the intrinsic winding of circuit breaker and reactor, the signal input part of sampling and synchronizing signal module is connected with voltage transformer and current transformer, the signal output part of sampling and synchronizing signal module is connected with two CPU modules, and power module is connected with two CPU modules.
2. mesohigh reactive power compensation composite construction according to claim 1; it is characterized in that being equipped with in the above-mentioned reactor body 2 core limbs and 4 common windings; 2 core limbs are distinguished the first core limb and the second core limb; 2 core limbs are wound with respectively two groups of single-column windings; 2 core limbs around the single-column winding be 4 groups of above-mentioned common windings; the winding of extraction 3% is as the DC control winding from the common winding of two offsides; these two DC control windings be respectively from the first core limb the one 3% tap windings around one of them common winding, extracted out and from the second core limb the two 3% tap windings around one of them common winding, extracted out; the first rc protection circuit is housed in the magnetic control case; the second rc protection circuit; fly-wheel diode; piezo-resistance; fuse; the first thyristor; the second thyristor; single phase alternating current power supply; wherein fly-wheel diode is connected with fuse; piezo-resistance is in parallel with above-mentioned series circuit; one end of piezo-resistance links to each other with the two 3% tap windings; the other end of piezo-resistance links to each other with the negative electrode of the first thyristor; the first thyristor and the second thyristor consist of the common cathode structure; the two ends of the second thyristor also connect the second resistance-capacitance protection loop; the anode of the second thyristor links to each other with the two 3% tap windings; the negative electrode of the second thyristor links to each other around another common winding with the second core limb; the two ends of the first thyristor also connect the first rc protection circuit; the anode of the first thyristor links to each other with the one 3% tap windings, and the negative electrode of the first thyristor links to each other around another common winding with the first core limb.
3. mesohigh reactive power compensation composite construction according to claim 1 is characterized in that above-mentioned triggering feedback module is that thyristor triggers feedback module.
4. according to claim 1 to 3 each described mesohigh reactive power compensation composite constructions, it is characterized in that above-mentioned pair of CPU module also is connected with liquid crystal interface and PC interface human-computer interaction module.
5. mesohigh reactive power compensation composite construction according to claim 4 is characterized in that above-mentioned pair of CPU module includes arm processor and DSP digital processing element, and arm processor directly links to each other by UART with the DSP digital processing element.
6. mesohigh reactive power compensation composite construction according to claim 5 is characterized in that above-mentioned pair of arm processor and the DSP digital processing element in the CPU module directly drives liquid crystal display in liquid crystal interface and the PC interface human-computer interaction module.
7. mesohigh reactive power compensation composite construction according to claim 6, it is characterized in that above-mentioned pair in the CPU module arm processor and the DSP digital processing element to carry out man-machine interface by the computer in RS232 communication unit and liquid crystal interface and the PC interface human-computer interaction module mutual, realize real-time remote monitoring.
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| CN 201320308233 CN203243056U (en) | 2013-05-30 | 2013-05-30 | High/middle-voltage reactive compensation composite structure |
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| CN 201320308233 CN203243056U (en) | 2013-05-30 | 2013-05-30 | High/middle-voltage reactive compensation composite structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746391A (en) * | 2014-02-18 | 2014-04-23 | 济南银河电气有限公司 | Magnetically controlled reactor primary triggering control method |
| CN104466973A (en) * | 2014-12-23 | 2015-03-25 | 国家电网公司 | Automatic voltage regulating device |
| CN106058886A (en) * | 2016-07-07 | 2016-10-26 | 安徽众升电力科技有限公司 | Reactive power compensator voltage acquisition apparatus |
| CN106208094A (en) * | 2016-07-07 | 2016-12-07 | 安徽众升电力科技有限公司 | A kind of reactive power compensator signal pickup assembly |
| CN106505853A (en) * | 2016-12-14 | 2017-03-15 | 李矞辉 | The single supply that band is simply protected turns two-supply circuit |
| CN106786656A (en) * | 2017-01-06 | 2017-05-31 | 中科电力装备（安徽）智能化科技有限公司 | A kind of high-pressure reactive compensation device |
-
2013
- 2013-05-30 CN CN 201320308233 patent/CN203243056U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746391A (en) * | 2014-02-18 | 2014-04-23 | 济南银河电气有限公司 | Magnetically controlled reactor primary triggering control method |
| CN104466973A (en) * | 2014-12-23 | 2015-03-25 | 国家电网公司 | Automatic voltage regulating device |
| CN106058886A (en) * | 2016-07-07 | 2016-10-26 | 安徽众升电力科技有限公司 | Reactive power compensator voltage acquisition apparatus |
| CN106208094A (en) * | 2016-07-07 | 2016-12-07 | 安徽众升电力科技有限公司 | A kind of reactive power compensator signal pickup assembly |
| CN106505853A (en) * | 2016-12-14 | 2017-03-15 | 李矞辉 | The single supply that band is simply protected turns two-supply circuit |
| CN106786656A (en) * | 2017-01-06 | 2017-05-31 | 中科电力装备（安徽）智能化科技有限公司 | A kind of high-pressure reactive compensation device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20140530 |