CN101060250A - Outdoor low voltage feeder cabinet with the intelligent power factor compensator - Google Patents
Outdoor low voltage feeder cabinet with the intelligent power factor compensator Download PDFInfo
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- CN101060250A CN101060250A CNA2006100258964A CN200610025896A CN101060250A CN 101060250 A CN101060250 A CN 101060250A CN A2006100258964 A CNA2006100258964 A CN A2006100258964A CN 200610025896 A CN200610025896 A CN 200610025896A CN 101060250 A CN101060250 A CN 101060250A
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- power factor
- compensation
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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 outdoor low-voltage feedback cabinet with intelligent power factor compensation device comprises: a cabinet body; in the body, a blade switch, a low-voltage air breaker, a current transformer, a power parameter analyzer calculating the sampled voltage from wire and current from transformer to obtain current power factor and necessary compensation value, an intelligent composite switch switching capacitors for optimal compensation, and some group compensation capacitors. This invention ensures high power factor, saves resource, has well reliability and automation level.
Description
Technical field
The present invention relates to low-voltage power supply equipment, be specifically related to a kind of and the supporting small-sized outdoor low voltage feeder cabinet of power transformer.
Background technology
Small-sized outdoor low voltage feeder cabinet general with 100-300KVA open air post on the supporting use of power transformer, provide 380V or 220V civil power to the user.Switch with knifeshaped fuse, lv air breaker, current transformer and compensation condenser place have rainproof, moistureproof, fire prevention, the cabinet of function such as anti-toy, the secondary feeder cabinet that enters of transformer is by having fuse and air circuit to user's feed, and capacitor compensates the power factor of circuit.But existing outdoor low voltage feeder cabinet generally adopts the compensation condenser of fixed capacity, contactor is adopted in the switching operation, therefore the compensation effect of power factor is undesirable, and because the switching of capacitor can not be accomplished current over-zero, so contactor burns or capacitor damage phenomenon happens occasionally.
Summary of the invention
The objective of the invention is to propose a kind of outdoor low voltage feeder cabinet with intelligent power factor compensator, the parameters of electric power analyzer that this feeder cabinet utilizes microcomputerization to the power factor of circuit from motion tracking, analysis, adjustment, and can carry out information exchange with upper unit, adopt the intelligent compound switch of the advantage that integrates control, controllable silicon and contactor simultaneously, realization is to the switching operation of compensation condenser, have single-phase and/or the three-phase activity coefficient compensate function, the switching operation is all carried out when current over-zero, avoids because of the arcing burning apparatus.
A kind of outdoor low voltage feeder cabinet of the present invention with intelligent power factor compensator, mainly comprise a cabinet, be equipped with switch with knifeshaped fuse in the cabinet, lv air breaker, current transformer and compensation condenser, transformer secondary output passes through switch with knifeshaped fuse, lv air breaker, current transformer is powered to the user, capacitor compensates the power factor of circuit, it is characterized in that also being equipped with parameters of electric power analyzer with data processing function and the intelligent compound switch that integrates reverse-blocking tetrode thyristor and relay, and be provided with some groups of compensation condensers, described parameters of electric power analyzer carries out computing to the sampling voltage of taking from circuit and the sampling current numerical value of taking from instrument transformer, can be to the electric current of supply line, voltage, active power, reactive power is followed the tracks of, and the capacitance that calculates current power factor value and need to compensate, in preservation and video data, the control intelligent compound switch carries out the switching operation of capacitor 4, and power factor is carried out The optimal compensation.
The invention has the advantages that: (1) is because the present invention has the intellectual analysis function, but the variation of real-time tracking circuit power factor, and determine whether that according to the variation of power factor needs adjust the compensation condenser in the circuit, the power factor of feed is remained on the higher level, guarantee power supply quality, energy savings, and safe and reliable; (2) because the present invention has the function of preserving data, therefore detected data can be stored as archives material; (3), therefore can realize communication, thereby improve the automatization level of transmission network greatly according to the instruction and the host computer of upper electrical network because the present invention has communication function.
Description of drawings
Fig. 1 is the circuit diagram of feeder cabinet of the present invention;
Fig. 2 is the structured flowchart of the parameters of electric power analyzer among Fig. 1;
Fig. 3 is the structured flowchart of the intelligent compound switch among Fig. 1.
Execution mode
Now the invention will be further described in conjunction with the accompanying drawings.
By Fig. 1, supply transformer is powered to the user through switch with knifeshaped fuse 1, lv air breaker 2, current transformer 3 after entering in the cabinet; Take from the sampling voltage and the sampling current signal input parameter analyzer 5 of taking from current transformer 3 of circuit, parameter analyzer 5 has data processing function, the data Presentation Function, data storage function and data communication facility, data are after parameters of electric power analyzer 5 is handled, calculate power factor value and determine whether and to carry out power factor compensation and compensation rate, intelligent compound switch 6 to correspondence sends control signal, intelligent compound switch 6 integrates reverse-blocking tetrode thyristor and relay, switching by controllable silicon driving relay control compensation capacitor carries out The optimal compensation to power factor.
By Fig. 2, described parameters of electric power analyzer 5 comprises signal shaping module 501 at least, A/D modular converter 502, central processing unit 503, display module 504, switching control module 505, data memory module 506 and communication module 507, and DC power supply 508, voltage sampling signal U and current sampling signal I are after signal shaping module 501 and A/D modular converter 502 convert digital signal to, input central processing unit 503 carries out computing, result of calculation is carried out digital display by display module 504, and deposit data memory module 506 in, send the switching operation that the corresponding intelligent compound switch 6 of control signal control compensates capacitor 4 by switching module 505 simultaneously, and carry out data communication by communication module 507 and host computer according to the instruction of upper electrical network.
By Fig. 3, described intelligent compound switch 6 comprises input module 601, governor circuit 602, composite switch module 603, open phase detection module 605 and power module 604 at least.The switching control signal enters governor circuit 602 by input module 601, the switching operation of the output of governor circuit 602 control combination switch 603, the access of control capacitor or cut out.Described composite switch module 603 is formed by controllable silicon and relay assembly, controllable silicon is state turnover when current over-zero only, therefore relay also only just has adhesive and release movement when current over-zero, so when inserting or cutting out capacitor, relay or capacitor arcing phenomenon can not occur, prevent that effectively relay or capacitor from damaging.
The present invention also has overvoltage, under voltage, open-phase protection to capacitor.
Described compensation condenser, the capacitor of configurable one or more groups Δ connection is used for the compensation to the power factor of three-phase circuit, referring among Fig. 1 401, and can dispose the capacitor of one or more groups Y connection simultaneously, be used for compensation, referring to 402-404 among Fig. 1 to the power factor of single phase circuit.Described parameters of electric power analyzer 5 can be controlled switching No. one capacitor according to operation result at every turn, also can control the capacitor of switching more than one tunnel simultaneously, capacitor is carried out the parallel connection combination, to improve the compensation precision of line power factor.Referring to Fig. 1.Because arrangement, the combination of multiple unit capacitor parallel connection can form different capacitances, therefore can carry out grading compensation, thereby can improve compensation precision single phase circuit and/or three-phase circuit.In the practicality, need between the quantity of capacitor and compensation precision, carry out balance, obtain The optimal compensation with the power factor that under most economical condition, makes circuit.
Claims (7)
1. outdoor low voltage feeder cabinet with intelligent power factor compensator, mainly comprise a cabinet, be equipped with switch with knifeshaped fuse in the cabinet, lv air breaker, current transformer and compensation condenser, it is characterized in that also being equipped with parameters of electric power analyzer with data processing function and the intelligent compound switch that integrates reverse-blocking tetrode thyristor and relay, and be provided with some groups of compensation condensers, described parameters of electric power analyzer carries out computing to the sampling voltage of taking from circuit and the sampling current numerical value of taking from instrument transformer, calculate current power factor value and the capacitance that needs compensation, in preservation and video data, control the switching operation that described intelligent compound switch carries out capacitor, power factor is carried out The optimal compensation.
2. outdoor low voltage feeder cabinet according to claim 1, it is characterized in that described parameters of electric power analyzer comprises the signal shaping module at least, the A/D modular converter, central processing unit, display module, the switching control module, data memory module and communication module, and DC power supply, voltage sampling signal and current sampling signal are after signal shaping module and A/D modular converter convert digital signal to, the input central processing unit carries out computing, result of calculation is carried out digital display by display module, and deposit data memory module in, send the switching operation that the corresponding intelligent compound switch of control signal control compensates capacitor by the switching module simultaneously.
3. outdoor low voltage feeder cabinet according to claim 2, it is characterized in that described parameters of electric power analyzer is according to operation result, each control switching No. one capacitor or the capacitor of control switching more than one tunnel, the capacitor that switching is gone into carries out the parallel connection combination, to improve the compensation precision of line power factor.
4. the outdoor low voltage feeder cabinet with intelligent power factor compensator according to claim 2 is characterized in that described parameters of electric power analyzer carries out data communication according to the instruction of upper electrical network by communication module and host computer.
5. outdoor low voltage feeder cabinet according to claim 1, it is characterized in that described intelligent compound switch comprises input module, governor circuit, composite switch module and power module at least, switching control signal from the parameters of electric power analyzer enters governor circuit by input module, and the output of governor circuit control combination switch is to the access of control capacitor or cut out.
6. outdoor low voltage feeder cabinet according to claim 4, it is characterized in that the composite switch module in the described intelligent compound switch is formed by controllable silicon and relay assembly, controllable silicon is state turnover when current over-zero only, therefore relay also only just has adhesive and release movement when current over-zero, thus when inserting or cutting out capacitor non-relay or capacitor arcing phenomenon.
7. according to claim 1,2 or 4 described outdoor low voltage feeder cabinets, it is characterized in that disposing the capacitor of one or more groups Δ connection, be used for compensation to the power factor of three-phase circuit, and dispose the capacitor of one or more groups Y connection simultaneously, be used for compensation to the power factor of single phase circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100258964A CN101060250A (en) | 2006-04-21 | 2006-04-21 | Outdoor low voltage feeder cabinet with the intelligent power factor compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100258964A CN101060250A (en) | 2006-04-21 | 2006-04-21 | Outdoor low voltage feeder cabinet with the intelligent power factor compensator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101060250A true CN101060250A (en) | 2007-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100258964A Pending CN101060250A (en) | 2006-04-21 | 2006-04-21 | Outdoor low voltage feeder cabinet with the intelligent power factor compensator |
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| CN (1) | CN101060250A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540129A (en) * | 2010-12-28 | 2012-07-04 | 苏州华电电气股份有限公司 | Automatic compensation device for checking large-capacity current transformer |
| CN113514669A (en) * | 2021-03-29 | 2021-10-19 | 杭州西湖电子研究所 | Wiring method for equipment detection of traction substation |
-
2006
- 2006-04-21 CN CNA2006100258964A patent/CN101060250A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540129A (en) * | 2010-12-28 | 2012-07-04 | 苏州华电电气股份有限公司 | Automatic compensation device for checking large-capacity current transformer |
| CN113514669A (en) * | 2021-03-29 | 2021-10-19 | 杭州西湖电子研究所 | Wiring method for equipment detection of traction substation |
| CN113514669B (en) * | 2021-03-29 | 2024-03-12 | 杭州西湖电子研究所 | Wiring method for traction substation equipment detection |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20071024 |