CN102437579A - Low-voltage reactive compensation device - Google Patents
Low-voltage reactive compensation device Download PDFInfo
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- CN102437579A CN102437579A CN2011104080213A CN201110408021A CN102437579A CN 102437579 A CN102437579 A CN 102437579A CN 2011104080213 A CN2011104080213 A CN 2011104080213A CN 201110408021 A CN201110408021 A CN 201110408021A CN 102437579 A CN102437579 A CN 102437579A
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- controller
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- excision
- voltage
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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 invention discloses a low-voltage reactive compensation device, which comprises a controller and an information sampling device. The controller is used for obtaining sampling information from an electrical device of a power grid through the information sampling device and processing and analyzing the sampling information; the zero voltage input point of the electrical device for reactive compensation is opened by the controller through an output port, and a capacitor group for input is determined by the controller; and the zero current cutting point of the electrical device with needs for cutting of the reactive compensation can be opened by the controller through the output port, and a capacitor group to be cut off based on determination can be cut off by the controller. The device has the beneficial effects that: mixed compensation, zero-crossing switching and reasonable capacitor matching can be realized, the power factor can be increased, the power supply quality can be improved greatly, the loss of circuit voltage can be reduced, the rate of utilization of equipment can be increased, and the transmission capacity of the power grid can be improved.
Description
Technical field
The present invention relates to the electric network reactive compensation dress, be specifically related to a kind of low-voltage reactive compensator capable.
Background technology
Traditional reactive compensation system adopts contactor as the switch on-off capacitor, and there are a lot of defectives in the common benefit mode that adopts three-phase to compensate simultaneously when compensating.At first, can't select optimum phase angle to drop into or excision electric capacity, can cause that electric current shoves or the overvoltage phenomenon, influence system and installed self useful life; Secondly, traditional three-phase apotype compensation arrangement altogether can not be controlled respectively each mutually, can only make a certain reasonable compensation that obtains mutually, and all the other occurred mending or owing to mend phenomenon mutually; Once more, the capacity of capacitor bank of traditional compensation arrangement equates that controller can not be discerned each pool-size automatically and carry out the appropriate combination compensation; In addition, contain a large amount of uses of the power consumption equipment of non-linear electric components such as semiconductor, electric arc and ferromagnetic material, in electric power system, harmonic pollution is more and more serious, and direct threats is to normal operation of equipment and equipment life.
Because three-phase load is uneven, causes the required reactive power compensation of three-phase also inequality, if also with three-phase apotype compensation arrangement altogether, in the time of will making certain reach reasonable compensation mutually, and all the other are crossed mutually and mend or owe to mend.
Summary of the invention
To the shortcoming of existing reactive power compensator, the present invention provides a kind of novel low-voltage reactive compensator capable.
To achieve these goals, the measure that the present invention taked:
A kind of low-voltage reactive compensator capable; Comprise controller and intelligence sample device; Controller is obtained sample information and is carried out Treatment Analysis from the electrical network power consumption equipment through the intelligence sample device, the capacitor group that controller is opened no-voltage input point and confirmed to drop into through its output port the power consumption equipment that needs reactive power compensation; Controller can also be opened zero current excision point and cut off the capacitor group of confirming excision through its output port the power consumption equipment that needs excise reactive power compensation.
The capacitor group of described definite input outputs to combination switch circulation input earlier and mends capacitor altogether, outputs to the combination switch circulation again and drops into branch benefit capacitor.
The capacitor group of described definite excision outputs to combination switch circulation excision earlier and mends capacitor altogether, outputs to combination switch circulation excision branch benefit capacitor again.
Described no-voltage input point and zero current excision point all adopts reverse-blocking tetrode thyristor and magnetic latching relay and the combination switch that connects.
Described controling appliance has the function of each capacity of capacitor bank size of identification, and can need automatic switching capacitor group not of uniform size according to the reality compensation.
The core component of controller is high speed, high performance microprocessor.
Beneficial effect of the present invention: realize mixed compensation, operating passing zero, rational capacitor coupling, improved power factor, power supply quality improves greatly, has reduced the line voltage distribution loss, improves the transmittability of utilization rate of equipment and installations and electrical network.
Description of drawings
Fig. 1, control principle figure of the present invention.
Embodiment
A kind of low-voltage reactive compensator capable; Comprise controller and intelligence sample device; Controller is obtained sample information and is carried out Treatment Analysis from the electrical network power consumption equipment through the intelligence sample device; Controller carries out analytical calculation to the required reactive power compensation amount of three-phase respectively, the capacitor group that controller is opened no-voltage input point and confirmed to drop into through its output port the power consumption equipment that needs reactive power compensation; Controller can also be opened zero current excision point and cut off the capacitor group of confirming excision through its output port the power consumption equipment that needs excise reactive power compensation, realizes mending altogether and dividing and mend.The capacitor group of described definite input outputs to combination switch circulation input earlier and mends capacitor altogether, outputs to the combination switch circulation again and drops into branch benefit capacitor.The capacitor group of described definite excision outputs to combination switch circulation excision earlier and mends capacitor altogether, outputs to combination switch circulation excision branch benefit capacitor again.Described no-voltage input point and zero current excision point all adopts reverse-blocking tetrode thyristor and magnetic latching relay and the combination switch that connects, realizes no impact, no-flashy-flow, no transition switching, has prolonged the useful life of capacitor.Should dispose corresponding idle compensating control take a sample simultaneously three-phase voltage and three-phase current signal; Respectively each mutually required reactive power compensation amount of A, B, C is carried out analytical calculation, with minimum compensation rate be that benchmark compensates three-phase simultaneously mutually, i.e. benefit altogether; Need different compensation rates to carry out phase splitting compensation mutually by each again; Promptly divide to mend, this with mend altogether with the compensation way that divides benefit to combine mixed compensation, can effectively solve and cause the undercompensation phenomenon by three-phase imbalance.Described controling appliance has the function of each capacity of capacitor bank size of identification, and can need automatic switching capacitor group not of uniform size according to the reality compensation, to reach best compensation effect.The core component of controller is high speed, high performance microprocessor, and response speed is fast, precision is high.Beneficial effect of the present invention: realize mixed compensation, operating passing zero, rational capacitor coupling, improved power factor, power supply quality improves greatly, has reduced the line voltage distribution loss, improves the transmittability of utilization rate of equipment and installations and electrical network.
Those skilled in the art's simple change and replacement all are within protection scope of the present invention in this area.
Claims (6)
1. low-voltage reactive compensator capable; It is characterized in that; Comprise controller and intelligence sample device; Controller is obtained sample information and is carried out Treatment Analysis from the electrical network power consumption equipment through the intelligence sample device, the capacitor group that controller is opened no-voltage input point and confirmed to drop into through its output port the power consumption equipment that needs reactive power compensation; Controller can also be opened zero current excision point and cut off the capacitor group of confirming excision through its output port the power consumption equipment that needs excise reactive power compensation.
2. based on the described a kind of low-voltage reactive compensator capable of claim 1, it is characterized in that the capacitor group of described definite input outputs to combination switch circulation input earlier and mends capacitor altogether, output to the combination switch circulation again and drop into branch benefit capacitor.
3. based on the described a kind of low-voltage reactive compensator capable of claim 1, it is characterized in that the capacitor group of described definite excision outputs to combination switch circulation excision earlier and mends capacitor altogether, output to combination switch circulation excision branch benefit capacitor again.
4. a kind of low-voltage reactive compensator capable according to claim 1 is characterized in that, described no-voltage input point and zero current excision point all adopts reverse-blocking tetrode thyristor and magnetic latching relay and the combination switch that connects.
5. a kind of low-voltage reactive compensator capable according to claim 1 is characterized in that, described controling appliance has the function of each capacity of capacitor bank size of identification, and can need automatic switching capacitor group not of uniform size according to the reality compensation.
6. a kind of low-voltage reactive compensator capable according to claim 1 is characterized in that, the core component of controller is high speed, high performance microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104080213A CN102437579A (en) | 2011-12-09 | 2011-12-09 | Low-voltage reactive compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104080213A CN102437579A (en) | 2011-12-09 | 2011-12-09 | Low-voltage reactive compensation device |
Publications (1)
| Publication Number | Publication Date |
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| CN102437579A true CN102437579A (en) | 2012-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011104080213A Pending CN102437579A (en) | 2011-12-09 | 2011-12-09 | Low-voltage reactive compensation device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201219200Y (en) * | 2008-07-01 | 2009-04-08 | 乐山一拉得电网自动化有限公司 | Non-flow low-voltage reactive power compensation set |
| CN102074963A (en) * | 2011-01-17 | 2011-05-25 | 北京清电华力电气自动化科技有限公司 | Intelligent reactive compensation comprehensive control device |
| CN202524091U (en) * | 2011-12-23 | 2012-11-07 | 温州南盛电力开关有限公司 | Low-voltage reactive power compensation device |
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2011
- 2011-12-09 CN CN2011104080213A patent/CN102437579A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201219200Y (en) * | 2008-07-01 | 2009-04-08 | 乐山一拉得电网自动化有限公司 | Non-flow low-voltage reactive power compensation set |
| CN102074963A (en) * | 2011-01-17 | 2011-05-25 | 北京清电华力电气自动化科技有限公司 | Intelligent reactive compensation comprehensive control device |
| CN202524091U (en) * | 2011-12-23 | 2012-11-07 | 温州南盛电力开关有限公司 | Low-voltage reactive power compensation device |
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120502 |