CN203243048U - Low-voltage reactive power automatic compensation device - Google Patents
Low-voltage reactive power automatic compensation device Download PDFInfo
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- CN203243048U CN203243048U CN 201320066010 CN201320066010U CN203243048U CN 203243048 U CN203243048 U CN 203243048U CN 201320066010 CN201320066010 CN 201320066010 CN 201320066010 U CN201320066010 U CN 201320066010U CN 203243048 U CN203243048 U CN 203243048U
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- reactive power
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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
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Abstract
The utility model discloses a low-voltage reactive power automatic compensation device. The low-voltage reactive power automatic compensation device comprises a reactive power controller, electric power compensation capacitors, reactors and switches. The electric power compensation capacitors are serially connected with the switches through the reactors 30 and then connected with an electrical network in a parallel way. The input end of the reactive power controller is in parallel connection with the electrical network. The output end of the reactive power controller cooperates with the controlled electric power compensation capacitors in a switching way through the switches. By adopting the high-integration-level reactive power controller to monitor the electrical network data in a real-time manner, the low-voltage reactive power automatic compensation device calculates a compensation amount according to a preset value and further automatically controls the switches to switch a corresponding number of electric power compensation capacitors on to compensate the reactive loss in the electrical network. By adopting the high-integration-level high-reliability reactive power controller, the low-voltage reactive power automatic compensation device is enabled to have the characteristics of simple structure, working stability and reliability, low closing inrush current and obvious increase in the power factor. The power factor is improved. The line loss is reduced. The load capability of the electrical network is enhanced. The power supply qualities are further improved. The energy-saving aim is also achieved.
Description
Technical field
The utility model belongs to the power technology field, is specifically related to the Low-voltage Automatic Reactive Compensation Equipment that a kind of power factor (PF) improves obviously, inrush phenomenon is low, simple in structure, protection is complete, easy to maintenance.
Background technology
The situation that low voltage electric network ubiquity power factor is lower, grid line loss is larger of China, the main cause that causes this phenomenon are that numerous inductive load power consumption equipment designs falls behind, and power factor is lower.Electric energy such as China's motor consumption accounts for 70% of whole energy output, and because the power factor of reasons China motor such as design and use is often lower, generally is about cos
φ=0.70.In addition, be inductive load mostly such as the huge Mine Equipment of power consumption, and also the substantial intermittent sex work, load factor also is very unstable, its total supply load fluctuation is very large, just how the power ratio control factor becomes a great problem.A lot of small mines are ignored this problem, cause power factor low for a long time, the hurried decline of power supply quality, and line loss increases, and utilization rate of equipment and installations is very low.Therefore, adopt the reactive power compensation power-saving technology, compensation low-voltage reactive power load is the important step of electric network reactive compensation, is very necessary to improving the quality of power supply and excavating the electrical network potentiality.Do low-voltage compensation well, not only can alleviate the pressure of upper level electric network reactive compensation, and can improve the utilance of user's distribution transformer, improve the factor is lead to consumer's meritorous service and quality of voltage, and can effectively reduce energy loss, reduce the demand charge expenditure.For this reason, develop a kind of simple in structure, complete, the power factor (PF) of protection improves significantly, inrush phenomenon Low-voltage Automatic Reactive Compensation Equipment low, easy to maintenance is the effective way that overcomes the prior art deficiency, has positive society and economy meaning.
Summary of the invention
The purpose of this utility model be to provide a kind of simple in structure, complete, the power factor (PF) of protection improves significantly, inrush phenomenon Low-voltage Automatic Reactive Compensation Equipment low, easy to maintenance.
The purpose of this utility model is achieved in that and comprises reactive power controller, electric power compensation capacitor, reactor, fling-cut switch, described electric power compensation capacitor by reactor with in parallel with electrical network again after fling-cut switch is connected, described reactive power controller input is in parallel with electrical network, and its output cooperates with control electric power compensation capacitor switching by fling-cut switch.
The utility model is by the reactive power controller Real-Time Monitoring electric network data of high integration, calculate compensation rate according to preset value, automatically the electric power compensation capacitor of control fling-cut switch switching respective numbers comes the reactive loss in the compensation network, neither can power factor (PF) cross benefit, can not owe again to mend, grid power factor improves in time and effectively, and line loss reduces obviously; By with electric power compensation capacitor's seriesu reactor, make it both can to reach the effect of restriction inrush phenomenon, reduce the impact to electrical network, can also reach Suppressing Switching Overvoltage and suppress in the electrical network high order harmonic component to the impact of capacitor, significant prolongation capacitor life-span.The circuit breaker of further connecting in the electric power compensation capacitor circuit can transship to the electric power compensation capacitor, short circuit and under-voltage protection.Adopt the reactive power controller that integrated level is high, reliability is strong, so that the utility model is simple in structure, working stability is reliable, inrush phenomenon is low, power factor (PF) improves significantly, but the Effective Raise power consumption efficiency reaches energy-conservation purpose.
Description of drawings
Fig. 1 is electrical schematic diagram of the present utility model;
Fig. 2 is a kind of reactive power controller electrical schematic diagram of the present utility model;
Fig. 3 is a kind of compensating circuit connection diagram of the present utility model;
Among the figure: 10-reactive power controller, 20-electric power compensation capacitor, 30-reactor, 40-fling-cut switch, 50-circuit breaker, 60-isolating switch.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described, but never in any form the utility model is limited, any change or improvement based on the utility model training centre is done all belong to protection range of the present utility model.
Such as Fig. 1 ~ shown in Figure 3, the utility model comprises reactive power controller 10, electric power compensation capacitor 20, reactor 30, fling-cut switch 40, it is in parallel with electrical network again after described electric power compensation capacitor 20 passes through reactor 30 and fling-cut switch 40 is connected, described reactive power controller 10 inputs are in parallel with electrical network, and its output cooperates with control electric power compensation capacitor 20 switchings by fling-cut switch 40.
The reactive power compensation switching mode of described reactive power controller 10 is order switching or switching cycle.
Described reactive power controller 10 adopts equipotential to drop into and/or the control of zero current excision mode switching.
Described reactive power controller 10 has the scratch pad memory of storage of collected data and/or the communication interface that is connected with host computer.
The reactance value of described reactor 30 be with it series capacitor bank capacitor value 5 ~ 7%.
Described fling-cut switch 40 is A.C. contactor or combination switch.
Described electric power compensation capacitor 20 is self-healing property electric power compensation capacitor or complex media electric power compensation capacitor.
Connect in described electric power compensation capacitor 20 and reactor 30, fling-cut switch 40 series circuits circuit breaker 50 is set.
Operation principle of the present utility model and the course of work:
During work, closed compensating circuit isolating switch 60 and startup reactive power controller 10, the reactive power controller 10 monitoring electric network datas of high integration also calculate compensation rate, when power system reactive power during less than preset value, automatically the electric power compensation capacitor 20 of control fling-cut switch 40 switching respective numbers comes the reactive loss in the compensation network, thereby in time improve grid power factor, reduce pressure drop of grid and reduce power network current, reduce line loss and improve utilization rate of equipment and installations.By with electric power compensation capacitor 20 series reactors 30, make it both can reach the effect of restriction inrush phenomenon, minimizing is to the impact of electrical network, can also reach Suppressing Switching Overvoltage and suppress in the electrical network high order harmonic component to the impact of capacitor, significant prolongation capacitor life-span.Further series connection circuit breaker 50 in electric power compensation capacitor 20 circuit, can provide to electric power compensation capacitor 20 transship, short circuit and under-voltage protection.
Claims (7)
1. Low-voltage Automatic Reactive Compensation Equipment, comprise reactive power controller (10), electric power compensation capacitor (20), reactor (30), fling-cut switch (40), it is characterized in that: in parallel with electrical network again after described electric power compensation capacitor (20) passes through reactor (30) and fling-cut switch (40) is connected, described reactive power controller (10) input is in parallel with electrical network, and its output cooperates with control electric power compensation capacitor (20) switching by fling-cut switch (40).
2. described Low-voltage Automatic Reactive Compensation Equipment according to claim 1, it is characterized in that: the reactive power compensation switching mode of described reactive power controller (10) is order switching or switching cycle.
3. described Low-voltage Automatic Reactive Compensation Equipment according to claim 1 is characterized in that: described reactive power controller (10) adopts equipotential to drop into and/or the switching control of zero current excision.
4. described Low-voltage Automatic Reactive Compensation Equipment according to claim 1 is characterized in that: the reactance value of described reactor (30) be with it series capacitor bank capacitor value 5 ~ 7%.
5. described Low-voltage Automatic Reactive Compensation Equipment according to claim 1, it is characterized in that: described fling-cut switch (40) is A.C. contactor or combination switch.
6. described Low-voltage Automatic Reactive Compensation Equipment according to claim 1, it is characterized in that: described electric power compensation capacitor (20) is self-healing property electric power compensation capacitor or complex media electric power compensation capacitor.
7. according to claim 1 to the described Low-voltage Automatic Reactive Compensation Equipment of 6 any one, it is characterized in that: connecting in described electric power compensation capacitor (20) and reactor (30), fling-cut switch (40) series circuit arranges circuit breaker (50).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320066010 CN203243048U (en) | 2013-02-05 | 2013-02-05 | Low-voltage reactive power automatic compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320066010 CN203243048U (en) | 2013-02-05 | 2013-02-05 | Low-voltage reactive power automatic compensation device |
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| Publication Number | Publication Date |
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| CN203243048U true CN203243048U (en) | 2013-10-16 |
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ID=49320307
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320066010 Expired - Lifetime CN203243048U (en) | 2013-02-05 | 2013-02-05 | Low-voltage reactive power automatic compensation device |
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| CN (1) | CN203243048U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656060A (en) * | 2016-03-29 | 2016-06-08 | 国网浙江奉化市供电公司 | Transformer and regional power grid system |
| CN105703379A (en) * | 2016-03-29 | 2016-06-22 | 国网浙江奉化市供电公司 | Power grid system |
| CN105932699A (en) * | 2016-06-08 | 2016-09-07 | 江苏盐开电气有限公司 | Optimized power distribution network three-phase load automatic regulating device and control method thereof |
| CN111404173A (en) * | 2020-04-22 | 2020-07-10 | 安徽东源电力有限公司 | Industrial power-saving device with reactive power |
-
2013
- 2013-02-05 CN CN 201320066010 patent/CN203243048U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656060A (en) * | 2016-03-29 | 2016-06-08 | 国网浙江奉化市供电公司 | Transformer and regional power grid system |
| CN105703379A (en) * | 2016-03-29 | 2016-06-22 | 国网浙江奉化市供电公司 | Power grid system |
| CN105932699A (en) * | 2016-06-08 | 2016-09-07 | 江苏盐开电气有限公司 | Optimized power distribution network three-phase load automatic regulating device and control method thereof |
| CN105932699B (en) * | 2016-06-08 | 2018-06-08 | 江苏盐开电气有限公司 | The control method of power distribution network three-phase load |
| CN111404173A (en) * | 2020-04-22 | 2020-07-10 | 安徽东源电力有限公司 | Industrial power-saving device with reactive power |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131016 |