CN201774256U - Reactive power compensation circuit of capacitor cabinet - Google Patents
Reactive power compensation circuit of capacitor cabinet Download PDFInfo
- Publication number
- CN201774256U CN201774256U CN2010202123501U CN201020212350U CN201774256U CN 201774256 U CN201774256 U CN 201774256U CN 2010202123501 U CN2010202123501 U CN 2010202123501U CN 201020212350 U CN201020212350 U CN 201020212350U CN 201774256 U CN201774256 U CN 201774256U
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- reactive power
- signal
- capacitor
- compensation circuit
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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
Abstract
The utility model relates to a reactive power compensation circuit of a capacitor cabinet. The reactive power compensation circuit of the capacitor cabinet comprises a compensation capacitor, a signal collection unit, a processing unit and a controllable silicon unit, wherein the compensation capacitor is connected with a load in parallel on a three-phase power source and used for compensating reactive power to the load; the signal collection unit is connected to each phase of power source of the three-phase power source respectively and used for collecting the current signals of each phase of power source of the three-phase power source respectively; the processing unit is used for processing the current signals collected by the signal collection unit respectively and generating control signals; and the controllable silicon unit is connected in series between the compensation capacitor and the three-phase power source and used for controlling the switching of the compensation capacitor according to the control signals. As the current signals of each phase of power source of the three-phase power source are collected, the reactive power compensation circuit of the capacitor cabinet conducts the reactive power compensation on each phase of the power source respectively, avoids the problem of overcompensation or undercompensation caused when the load of the three-phase power source is unbalanced, and improves the reactive power compensation efficiency.
Description
Technical field
The utility model relates to the reactive power compensation technology field, particularly a kind of capacitor box reactive power compensation circuit.
Background technology
In electric power system, because the existence of resistance and reactance, the transmission of electricity power delivery exists a part of power to be recycled to the transmission of electricity power supply to the electrical power of power consumption equipment, i.e. the reactive power of resistance and reactance storage.Reactive power is big more, and the loss of voltage of circuit and electric energy loss are big more, and the utilance of electric power enterprise is low more.Therefore, must compensate, to reduce the reactive power in the electric power system to reactive power.
One of existing Non Power Compensation Process is that capacitor is in parallel with compensation equipment, and capacitor is carried out switching by controllable silicon controller, by gathering the signal of any phase in the three phase mains, and capacitor is carried out correspondingly switching, thereby reach the purpose of dynamic compensation reactive power according to acquired signal.
Above-mentioned controllable silicon controller is only applicable in the distribution system of threephase load balance the operation/cutting method of capacitor.And the use of single-phase load is in the majority in civil buildings, and then different loads is easy to cause the imbalance of threephase load.Therefore, if just gather any phase in the three phase mains, then overcompensation or undercompensation may appear in other two-phases.Not only do not reach the effect of compensating power, but also destroyed the normal operation of distribution system.
The utility model content
Main purpose of the present utility model provides a kind of capacitor box reactive power compensation circuit, is intended to improve the efficient of the reactive power compensation of capacitor box.
A kind of capacitor box reactive power compensation circuit that the utility model provides comprises:
Building-out capacitor is connected in parallel on the three phase mains with load, is used for load is carried out the compensation of reactive power;
Signal gathering unit, correspondence are connected on each phase power supply of three phase mains, are used for gathering respectively the current signal of each phase power supply of three phase mains;
Processing unit is handled the current signal of signal gathering unit collection respectively, and produces control signal;
The controllable silicon unit is connected between building-out capacitor and the three phase mains, is used for according to control signal the switching of control compensation electric capacity.
Preferably, above-mentioned signal gathering unit comprises current transformer, and the two ends of current transformer are connected on the phase power supply of three phase mains, and output current signal.
Preferably, above-mentioned processing unit comprises pulse-generating circuit, according to current signal, produces the control signal of pulse triggering signal.
Preferably, above-mentioned controllable silicon unit comprises two thyristors, and the mutual reverse parallel connection of this two thyristor is in conducting or cut-off state according to pulse triggering signal.
Preferably, foregoing circuit also comprises fuse, is connected between three phase mains and the signal gathering unit.
The utility model capacitor box reactive power compensation circuit is gathered by the current signal to each phase power supply of three phase mains, thereby respectively reactive power compensation is carried out in the load on each phase power supply, the overcompensation or the undercompensation problem that have occurred when having avoided the laod unbalance of three phase mains have improved the efficient of reactive power compensation.
Description of drawings
Fig. 1 is the structured flowchart of capacitor box reactive power compensation circuit one embodiment of the present utility model;
Fig. 2 is the electrical block diagram of capacitor box reactive power compensation circuit in the foregoing description.
The realization of the utility model purpose, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Fig. 1 is the structural representation of the utility model capacitor box reactive power compensation circuit one embodiment.
Present embodiment capacitor box reactive power compensation circuit comprises building-out capacitor 10, signal gathering unit 20, processing unit 30 and controllable silicon unit 40.Building-out capacitor 10 is connected in parallel on the three phase mains with load, is used for load is carried out the compensation of reactive power.Signal gathering unit 20 correspondences are connected on each phase power supply of three phase mains, are used for gathering respectively the current signal of each phase power supply of three phase mains.The current signal that 30 pairs of signal gathering unit of processing unit 10 are gathered is handled, and produces control signal.40 of controllable silicon unit are connected between building-out capacitor 10 and the three phase mains, can be according to control signals, and the switching of control compensation electric capacity 10.
The utility model capacitor box reactive power compensation circuit is gathered by the current signal to each phase power supply of three phase mains, thereby respectively reactive power compensation is carried out in the load on each phase power supply, the overcompensation or the undercompensation problem that have occurred when having avoided the laod unbalance of three phase mains have improved the efficient of reactive power compensation.
With reference to Fig. 2, above-mentioned signal gathering unit 20 comprises current transformer L.The two ends of capacitor mutual-inductor L are connected on the phase power supply of three phase mains, output current signal.This current transformer L is the current transformer of BH-0.66KV series.The current transformer of BH-0.66KV series is an ABS flame retardant plastics shell full-closed structure, makes not moisture-sensitive of product; And its permeability magnetic material adopts the annular core through annealing in process, can guarantee the certainty of measurement of 0.2 grade or 0.5 grade.
Above-mentioned processing unit 30 comprises pulse-generating circuit, according to current signal, produces the control signal of pulse triggering signal.
Above-mentioned controllable silicon unit 40 comprises two thyristors, and the mutual reverse parallel connection of this two thyristor is in conducting or cut-off state according to pulse triggering signal.This thyristor comprises the two input utmost points, the control utmost point.The control signal of this control utmost point received pulse triggering signal, conducting or by thyristor, and, reach the purpose of regulating reactive power compensation according to the angle of flow of the size adjustment thyristor of pulse triggering signal.
Said apparatus also comprises fuse FU1, and this fuse FU1 is connected between three phase mains and the signal gathering unit 20.After the electric current of the fuse FU1 that flows through surpasses the setting certain hour, the heat that produces with himself makes the melt fusing and open circuit causes damage to signal gathering unit 20, processing unit 30, controllable silicon unit 40 and building-out capacitor 10 when making short circuit or overcurrent.
Above-mentioned building-out capacitor 10 comprises the first single-phase electricity container C1, the second single-phase electricity container C2, the 3rd single-phase electricity container C3, be connected with controllable silicon unit 40 respectively, switching by controllable silicon unit 40, each phase power supply is carried out reactive power compensation respectively, prevented overcompensation or undercompensation that threephase load occurs when uneven.The capacity of the first single-phase electricity container C1, the second single-phase electricity container C2 and the 3rd single-phase electricity container C3 can specifically be selected according to the difference of the load of each phase power supply.
The above only is a preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure that utilizes the utility model specification and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (5)
1. a capacitor box reactive power compensation circuit comprises building-out capacitor, is connected in parallel on the three phase mains with load, is used for load is carried out the compensation of reactive power, it is characterized in that, also comprises:
Signal gathering unit, correspondence are connected on each phase power supply of three phase mains, are used for gathering respectively the current signal of each phase power supply of three phase mains;
Processing unit is handled the current signal of signal gathering unit collection respectively, and produces control signal;
The controllable silicon unit is connected between building-out capacitor and the three phase mains, is used for according to control signal the switching of control compensation electric capacity.
2. capacitor box reactive power compensation circuit as claimed in claim 1 is characterized in that described signal gathering unit comprises current transformer, and the two ends of current transformer are connected on the phase power supply of three phase mains, and output current signal.
3. capacitor box reactive power compensation circuit as claimed in claim 2 is characterized in that described processing unit comprises pulse-generating circuit, according to current signal, produces the control signal of pulse triggering signal.
4. capacitor box reactive power compensation circuit as claimed in claim 3 is characterized in that, described controllable silicon unit comprises two thyristors, and the mutual reverse parallel connection of this two thyristor is in conducting or cut-off state according to pulse triggering signal.
5. as any described capacitor box reactive power compensation circuit in the claim 1 to 3, it is characterized in that described circuit also comprises fuse, be connected between three phase mains and the signal gathering unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202123501U CN201774256U (en) | 2010-06-02 | 2010-06-02 | Reactive power compensation circuit of capacitor cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202123501U CN201774256U (en) | 2010-06-02 | 2010-06-02 | Reactive power compensation circuit of capacitor cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201774256U true CN201774256U (en) | 2011-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202123501U Expired - Fee Related CN201774256U (en) | 2010-06-02 | 2010-06-02 | Reactive power compensation circuit of capacitor cabinet |
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| CN (1) | CN201774256U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026837A (en) * | 2016-07-14 | 2016-10-12 | 哈尔滨兴亚技术有限公司 | Power driver |
-
2010
- 2010-06-02 CN CN2010202123501U patent/CN201774256U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026837A (en) * | 2016-07-14 | 2016-10-12 | 哈尔滨兴亚技术有限公司 | Power driver |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen Hongyan Electric Control Equipment Co., Ltd. Assignor: Liu Yuyan Contract record no.: 2011440020144 Denomination of utility model: Reactive power compensation circuit of capacitor cabinet Granted publication date: 20110323 License type: Exclusive License Record date: 20110427 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110323 Termination date: 20160602 |