CN201629578U - Low-voltage power capacitor - Google Patents
Low-voltage power capacitor Download PDFInfo
- Publication number
- CN201629578U CN201629578U CN2009202908006U CN200920290800U CN201629578U CN 201629578 U CN201629578 U CN 201629578U CN 2009202908006 U CN2009202908006 U CN 2009202908006U CN 200920290800 U CN200920290800 U CN 200920290800U CN 201629578 U CN201629578 U CN 201629578U
- Authority
- CN
- China
- Prior art keywords
- parallel
- air switch
- zero
- switching circuit
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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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
-
- 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
- Y02E40/40—Arrangements for reducing harmonics
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- Control Of Electrical Variables (AREA)
Abstract
A low-voltage power capacitor with simple structure and small number of contacts comprises an air switch and a unit capacitor component, wherein a thyristor switching circuit is connected between the air switch and the unit capacitor component in series; the thyristor switching circuit comprises a zero-crossing measurement and control over-voltage protection module, a high-power magnetic holding relay and a rapid silicon controlled thyristor (SCR); the zero-crossing measurement and control over-voltage protection module is connected with the rapid SCR in parallel; the high-power magnetic holding relay is also connected with the rapid SCR in parallel; and an intelligent measurement and control unit is connected between the air switch and the thyristor switching circuit in parallel, and conducts zero-crossing trigger control on the thyristor switching circuit so as to realize non-contact function. In the utility model, the structure of capacitors is simplified, and the number of the contacts is reduced, thus effectively avoiding over-high voltage drop and heating of a line, improving the quality of power supply, and reducing accident rate.
Description
Technical field
The utility model relates to a kind of electric power apparatus, relates in particular to a kind of low voltage power capacitor.
Background technology
35KV (10KV) box-type substation has been widely used in the electric power system of urban construction and residential quarter, because box-type substation adopts microcomputer-based intelligent management and unattended operation substantially, therefore more and more higher to the requirement of equipment, wherein the 0.4KV reactive power compensation adopts tradition to mould shell switch (fuse), reactor, contactor, thermal relay and shunt capacitor series wiring mode, complex structure, cause the contact in the system a lot, in service owing to contact causes contact resistance excessive too much, thereby the too high and heating of line drop occurs, reduced power supply quality, increased rate of failure.
Summary of the invention
The purpose of this utility model provides a kind of simple in structure, low voltage power capacitor that number of connections is few.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of low voltage power capacitor, comprise air switch and monolithic capacitor assembly, it is characterized in that: be in series with the thyristor switch circuit between air switch and the monolithic capacitor assembly, the thyristor switch circuit is comprising zero passage observing and controlling overvoltage protective module, power magnetic force keeping relay and fast controllable silicon, zero observing and controlling overvoltage protective module is in parallel with fast controllable silicon, and power magnetic force keeping relay also is in parallel with fast controllable silicon; Be parallel with intelligent measurement and control unit between air switch and the thyristor switch circuit, intelligent measurement and control unit carries out zero cross fired control to the thyristor switch circuit, can realize contactless function.
The utility model has been simplified the structure of capacitor, has reduced number of connections, can effectively avoid the too high and heating of line drop, improves power supply quality, reduces rate of failure.
Description of drawings
Fig. 1 is an electrical principle schematic diagram of the present utility model.
In the accompanying drawing:
1, intelligent measurement and control unit 2, air switch 3, thyristor switch circuit
4, zero passage observing and controlling overvoltage protective module 5, power magnetic force keeping relay
6, fast controllable silicon 7, monolithic capacitor assembly
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further described:
A kind of low voltage power capacitor, as shown in Figure 1, comprise air switch 2 and monolithic capacitor assembly 7, be in series with thyristor switch circuit 3 between air switch 2 and the monolithic capacitor assembly 7, thyristor switch circuit 3 is comprising zero passage observing and controlling overvoltage protective module 4, power magnetic force keeping relay 5 and fast controllable silicon 6, zero observing and controlling overvoltage protective module 4 is in parallel with fast controllable silicon 6, and power magnetic force keeping relay 5 also is in parallel with fast controllable silicon 6; Be parallel with intelligent measurement and control unit 1 between air switch 2 and the thyristor switch circuit 3,1 pair of thyristor switch circuit of intelligent measurement and control unit 3 carries out zero cross fired control, can realize contactless function.
The utility model adopts shunt capacitor to replace traditional compensation way, reduces line drop, guarantees power supply reliability and fail safe; Adopt that three-phase is mended altogether, single-phase branch is mended and mix multiple mode such as benefits, satisfy various load needs, improve power supplying efficiency, realize saving energy and reduce the cost.
The utility model adopts the shunt capacitor self-organizing system or adds controller according to compensation capacity, realizes the low-voltage reactive power automatic compensation function; Adopt the cordwood system type package assembly, concentrate, disperse to install, be applicable to various places and environment; Shunt capacitor also has operating passing zero, overheat protector, excess current protective function except that having conventional func, and fault self-diagnosis, online function (adopting RS232 or RS485), and is remote controlled.
The application of the utility model in box-type substation, can guarantee system power factor 〉=99%, more traditional reactive power compensation mode raises the efficiency 15%, reduce line loss 30%, owing to adopted static noncontacting switch, can effectively reduce harmonic pollution, realize that harmonic current accounts for below 5% of fundametal compoment, improve the useful life of box-type substation and power consumption equipment greatly.
Claims (1)
1. low voltage power capacitor, comprise air switch (2) and monolithic capacitor assembly (7), it is characterized in that: be in series with thyristor switch circuit (3) between air switch (2) and the monolithic capacitor assembly (7), thyristor switch circuit (3) is comprising zero passage observing and controlling overvoltage protective module (4), power magnetic force keeping relay (5) and fast controllable silicon (6), zero observing and controlling overvoltage protective module (4) is in parallel with fast controllable silicon (6), and power magnetic force keeping relay (5) also is in parallel with fast controllable silicon (6); Be parallel with intelligent measurement and control unit (1) between air switch (2) and the thyristor switch circuit (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202908006U CN201629578U (en) | 2009-12-28 | 2009-12-28 | Low-voltage power capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202908006U CN201629578U (en) | 2009-12-28 | 2009-12-28 | Low-voltage power capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201629578U true CN201629578U (en) | 2010-11-10 |
Family
ID=43060977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202908006U Expired - Fee Related CN201629578U (en) | 2009-12-28 | 2009-12-28 | Low-voltage power capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201629578U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545819A (en) * | 2013-09-18 | 2014-01-29 | 宁夏天地经纬电力设备工程有限公司 | Intelligent capacitor for static compensation and harmonic suppression |
| CN103595056A (en) * | 2013-09-18 | 2014-02-19 | 宁夏天地经纬电力设备工程有限公司 | Intelligent capacitor |
-
2009
- 2009-12-28 CN CN2009202908006U patent/CN201629578U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545819A (en) * | 2013-09-18 | 2014-01-29 | 宁夏天地经纬电力设备工程有限公司 | Intelligent capacitor for static compensation and harmonic suppression |
| CN103595056A (en) * | 2013-09-18 | 2014-02-19 | 宁夏天地经纬电力设备工程有限公司 | Intelligent capacitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20101110 Termination date: 20121228 |