CN204068278U - A kind of timing reactive power compensator for low-voltage circuit - Google Patents
A kind of timing reactive power compensator for low-voltage circuit Download PDFInfo
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- CN204068278U CN204068278U CN201420502536.9U CN201420502536U CN204068278U CN 204068278 U CN204068278 U CN 204068278U CN 201420502536 U CN201420502536 U CN 201420502536U CN 204068278 U CN204068278 U CN 204068278U
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- voltage circuit
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- 239000003990 capacitor Substances 0.000 claims abstract description 23
- 230000005611 electricity Effects 0.000 claims abstract description 7
- 230000001939 inductive effect Effects 0.000 claims abstract description 7
- 230000001131 transforming effect Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
A kind of timing reactive power compensator for low-voltage circuit, comprise building-out capacitor circuit and compensation control circuit, described building-out capacitor circuit comprises three head and the tail and to connect in turn the capacitor of triangularity wiring, contact between adjacent two capacitors is by three-phase connection line, the corresponding three phase supply phase line connecting low-voltage circuit, described compensation control circuit comprises timing controller and contactor, described contactor is provided with three normally opened contacts be serially connected on described three-phase connection line, the output of described timing controller connects and contactor action described in timing controlled, the utility model can realize the periodicity reactive power compensation to low-voltage circuit, there is structure simple, the advantage such as with low cost, can be widely used in low-voltage circuit is voltage cycle low-voltage circuit on the low side, low-voltage circuit near low-voltage customer electricity consumption side or the low-voltage circuit near inductive load Relatively centralized region.
Description
Technical field
The utility model relates to a kind of reactive power compensator, especially a kind of reactive power compensator for low-voltage circuit.
Background technology
Rural power grids distribute-electricity transformer district line end often lower than technical standard requirement, low pressure single phase power supply voltage range: between 09UN to 1.07UN, namely between 198V to 235.4V.Low-voltage circuit backbone end, branch line are often lower than 198V, especially outstanding in peak times of power consumption supply power voltage problem on the low side, and become power customer electricity consumption complaint " focus ".Current low-voltage customer inductive load power consumption equipment increases, as refrigerator, air-conditioning, small-size water pumping machine, electricity-saving lamp etc., distribution transforming and low-voltage circuit power factor low, reactive current is large, and line loss is high, distribution transforming and low-voltage circuit effective power supply capacity utilance low.For the problems referred to above, traditional solution is: (1) electric network reconstruction; (2) distribution transforming installs reactive power automatic compensation device (compensating with device) additional, always compensate; (3) Large Copacity inductive load user adopts " random back-off " mode, dispersion local compensation.Existing reactive power automatic compensation device forms primarily of current transformer, switching automatic controller, contactor and capacitor, although it is large to have capacity, classification can be carried out from motion tracking power factor, phase-splitting automatic switching capacitor carries out reactive power compensation, but still there is following shortcoming: volume is large, cost is high, Installation and Debugging are more complicated, O&M cost is high, drops into one about about 20,000.Generally being installed on total outlet position, distribution low-voltage side, is a kind of idle work centralized compensation to whole district, i.e. " with device compensates ", can not reduce low-voltage circuit electric current, very limited to the supply power voltage effect improving line end and branch line.Its capacitor switching strategy is determined according to power factor, reactive current or reactive power, need to gather load-side electric current, therefore, it is complicated that device installs wiring, need current transformer is installed, load current is gathered, computational load side power factor and reactive power by current transformer and harvester.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, provides the timing reactive power compensator for low-voltage circuit that a kind of structure is simple, with low cost.
The purpose of this utility model realizes by following technical solution:
A kind of timing reactive power compensator for low-voltage circuit, comprise building-out capacitor circuit and compensation control circuit, it is characterized in that: described building-out capacitor circuit comprises three head and the tail and to connect in turn the capacitor of triangularity wiring, contact between adjacent two capacitors is by three-phase connection line, the corresponding three phase supply phase line connecting low-voltage circuit, described compensation control circuit comprises timing controller and contactor, described contactor is provided with three normally opened contacts be serially connected on described three-phase connection line, the output of described timing controller connects and contactor action described in timing controlled.
Further, described timing controller is serially connected between arbitrary three-phase connection line and zero line connection line.
Further, described three-phase connection line and zero line connection line are all serially connected with circuit breaker.
Further, described low-voltage circuit is voltage cycle low-voltage circuit on the low side, the low-voltage circuit near low-voltage customer electricity consumption side or the low-voltage circuit near inductive load Relatively centralized region.
The utility model has following beneficial effect:
Compensation control circuit periodically can carry out reactive power compensation to low-voltage circuit by control and compensation condenser network, compensation control circuit is controlled by timing controller property performance period, timing controller with 24 hours for cycle period, specifically can collect residential electricity consumption fluctuation of load cycle stage, setting timing controller parameter according to load summit period or voltage condition, the capacitor of point one or more period switching building-out capacitor circuit carries out reactive power compensation; It is voltage cycle low-voltage circuit on the low side, the low-voltage circuit near low-voltage customer electricity consumption side or the low-voltage circuit near inductive load Relatively centralized region that the utility model can be applicable to low-voltage circuit, and tool has the following advantages: reduced investment, and Meteorological is hundreds of unit only; The supply power voltage near access point can be significantly improved, improve user's isoelectric point rate of qualified voltage; Reduce the size of current between device access point to distribution transforming, shorten the fed distance of reactive power, reduce platform district line loss; Wiring is simple, only needs the binding post of phase line, zero line access device; Volume is little, lightweight, and installation site is flexible.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
With reference to shown in Fig. 1, a kind of timing reactive power compensator for low-voltage circuit, being applied in low-voltage circuit is voltage cycle low-voltage circuit on the low side, on the low-voltage circuit in the low-voltage circuit near low-voltage customer electricity consumption side or close inductive load Relatively centralized region, comprise building-out capacitor circuit and compensation control circuit, building-out capacitor circuit comprises three head and the tail and to connect in turn the capacitor C1 of triangularity wiring, C2, C3, contact between adjacent two capacitors passes through A, B, C is connected circuit, the corresponding A connecting low-voltage circuit, B, C phase is powered phase line, compensation control circuit comprises timing controller KT and contactor KM, timing controller KT is serially connected in C and is connected between circuit and zero line connection line, contactor KM is provided with and is serially connected in A, B, C is connected three normally opened contact KM1 on circuit, KM2, KM3, the output of timing controller KT connects and timing controlled contactor KM action, be connected circuit and zero line connection line of A, B, C is all serially connected with circuit breaker Q F1, QF2, QF3, QF4.
Specific works mode is: in peak times of power consumption, timing controller KT control contactor KM action, and closed normally opened contact KM1, KM2, KM3, make building-out capacitor circuit come into operation and carry out reactive power compensation; And after peak times of power consumption, timing controller KT control contactor KM action, disconnects normally opened contact KM1, KM2, KM3, building-out capacitor circuit is quit work, so, just can realize the periodicity reactive power compensation to low-voltage circuit.
The above, be only preferred embodiment of the present utility model, therefore can not limit with this scope that the utility model implements, the equivalence namely done according to the utility model claim and description change with modify, all should still belong in scope that the utility model patent contains.
Claims (4)
1. the timing reactive power compensator for low-voltage circuit, comprise building-out capacitor circuit and compensation control circuit, it is characterized in that: described building-out capacitor circuit comprises three head and the tail and to connect in turn the capacitor of triangularity wiring, contact between adjacent two capacitors is by three-phase connection line, the corresponding three phase supply phase line connecting low-voltage circuit, described compensation control circuit comprises timing controller and contactor, described contactor is provided with three normally opened contacts be serially connected on described three-phase connection line, the output of described timing controller connects and contactor action described in timing controlled.
2. a kind of timing reactive power compensator for low-voltage circuit according to claim 1, is characterized in that: described timing controller is serially connected between arbitrary three-phase connection line and zero line connection line.
3. a kind of timing reactive power compensator for low-voltage circuit according to claim 2, is characterized in that: described three-phase connection line and zero line connection line are all serially connected with circuit breaker.
4. a kind of timing reactive power compensator for low-voltage circuit according to claim 1 or 2 or 3, is characterized in that: described low-voltage circuit is voltage cycle low-voltage circuit on the low side, the low-voltage circuit near low-voltage customer electricity consumption side or the low-voltage circuit near inductive load Relatively centralized region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420502536.9U CN204068278U (en) | 2014-09-02 | 2014-09-02 | A kind of timing reactive power compensator for low-voltage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420502536.9U CN204068278U (en) | 2014-09-02 | 2014-09-02 | A kind of timing reactive power compensator for low-voltage circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204068278U true CN204068278U (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420502536.9U Expired - Fee Related CN204068278U (en) | 2014-09-02 | 2014-09-02 | A kind of timing reactive power compensator for low-voltage circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204068278U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167745A (en) * | 2014-09-02 | 2014-11-26 | 国网福建南安市供电有限公司 | Timing reactive compensation device for low-voltage circuit |
| CN110797881A (en) * | 2019-10-10 | 2020-02-14 | 国网河北省电力有限公司衡水市桃城区供电分公司 | Device and method for in-situ reactive power compensation switching |
-
2014
- 2014-09-02 CN CN201420502536.9U patent/CN204068278U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167745A (en) * | 2014-09-02 | 2014-11-26 | 国网福建南安市供电有限公司 | Timing reactive compensation device for low-voltage circuit |
| CN110797881A (en) * | 2019-10-10 | 2020-02-14 | 国网河北省电力有限公司衡水市桃城区供电分公司 | Device and method for in-situ reactive power compensation switching |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20141231 Termination date: 20210902 |