CN203589734U - Flexible low-voltage power compensation device - Google Patents
Flexible low-voltage power compensation device Download PDFInfo
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- CN203589734U CN203589734U CN201320639453.XU CN201320639453U CN203589734U CN 203589734 U CN203589734 U CN 203589734U CN 201320639453 U CN201320639453 U CN 201320639453U CN 203589734 U CN203589734 U CN 203589734U
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- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000003068 static effect Effects 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 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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- 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
Abstract
The utility model discloses a flexible low-voltage power compensation device. The flexible low-voltage power compensation device is disposed in a power grid and comprises a flexible reactive compensation module, a hierarchic reactive compensation module, a master controller, and an inlet wire breaker. The hierarchic reactive compensation module is used for total reactive compensation of the power grid. The flexible reactive compensation module is used for precision reactive compensation. The input end of the master controller is connected with the power grid. The output end of the master controller is connected with the input end of the flexible reactive compensation module and the input end of the hierarchic reactive compensation module. The output end of the flexible reactive compensation module is connected with hierarchic reactive compensation module in parallel and then is connected to the power grid via the inlet wire breaker. The flexible low-voltage power compensation device retains advantages of high reliability and low cost of hierarchic reactive compensation and has a quick continuous adjustable function. According to a system requirement, the flexible low-voltage power compensation device may output reactive power dynamically, quickly, and continuously so as to offset the reactive power of the system, thereby achieving effects of increasing a power factor, decreasing line loss, reducing energy, and lowering loss.
Description
Technical field
The utility model belongs to distribution field, particularly a kind of flexible low pressure and low power compensation arrangement.
Background technology
In modern power distribution systems, exist a lot of idle variations fast, with the equipment of TV university as the rolling mill in spot welding machine, iron and steel enterprise in auto manufacturing etc.Existing Reactive Compensation Mode mainly contains the compensation way of contactor switching, compensation way and the static state reactive generator of thuristor throw-in and throw-off, and these compensation ways exist following deficiency in above-mentioned operating mode:
1, the compensation way of contactor switching cannot compensate the idle of system change fast;
2, although the compensation way of thuristor throw-in and throw-off compensating reactive power is fast that segmented compensation is idle due to what adopt, so be difficult to reach the idle effect of Continuous Compensation.
3, although the compensating reactive power that static state reactive generator can be rapidly, continuously, because current jumbo static state reactive generator cost is very high and stability has much room for improvement, market is difficult to accept.
Utility model content
Utility model object: the problem and shortage existing for above-mentioned prior art, order of the present utility model provides one to be applied to the following field of low pressure 690V, both there is the high reliability of classification reactive power compensation, advantage cheaply, there is again the static reacance generator flexible low pressure and low power compensation arrangement of adjustable function continuously fast.
Technical scheme: for realizing above-mentioned utility model object, the technical solution adopted in the utility model is a kind of flexible low pressure and low power compensation arrangement, described device is arranged in electrical network, and it comprises flexible reactive power compensating module, classification reactive compensation module, master controller and lead-in circuit breaker; Wherein, described classification reactive compensation module is for carrying out the total reactive power compensation of electrical network, and described flexible reactive power compensating module is for precision reactive power compensation; The input of described master controller is connected with electrical network, the output of described master controller is connected with the input of flexible reactive power compensating module and classification reactive compensation module respectively, and the output of described flexible reactive power compensating module is in parallel with classification reactive compensation module through lead-in circuit breaker access electrical network.
Further, described flexible reactive power compensating module comprises three groups of inductance, three phase full bridge conversion module, DC voltage-stabilizing capacitance group, driver element; The input of described driver element is connected with the output of described master controller, the input of the output access three phase full bridge conversion module of described driver element, the output of described three phase full bridge conversion module is connected with the input of described every group of inductance, the output of described every group of inductance is connected to the grid respectively, the DC bus end of described DC voltage-stabilizing capacitance group access three phase full bridge conversion module; Wherein, described classification reactive compensation module comprises multiple switchings unit, multiple compensating units of being connected with switching unit respectively; The input of described switching unit is connected with electrical network, and the output of described switching unit is connected with the output of described compensating unit.
Described master controller comprises digital signal processor, detecting signal unit, current tracking control unit, DC control unit, protected location, switching control unit and display monitoring unit; current transformer signal and voltage signal access described detecting signal unit; by incoming digital signal processor after described detecting signal unit filtering; after digital signal processor, access respectively described current tracking control unit, DC control unit, protected location, switching control unit and display monitoring unit.
The thyristor throw-cut switch that described switching unit is zero passage, dropped in the voltage zero-cross moment, in current zero-crossing point excision, the generation that can prevent from like this shoving, effectively protected distribution system; And the switching speed of the thyristor throw-cut switch of zero passage is fast, be less than 10 milliseconds.
Described compensating unit is the resonance eliminating type compensating unit that the multiple reactors of series connection form, and compensation condenser and reactor are combined as compensation circuit with certain reactance Rate, in the occasion that has harmonic wave, can effectively suppress harmonic wave, eliminates resonance.
Operation principle: the utility model is on the basis of classification reactive power compensation, increase voltage source inverter and controlled the voltage and current waveform that whole device is exported, first carry out classification reactive power compensation, then among a small circle, use voltage source inverter to carry out precision reactive power compensation.
Beneficial effect: compared with prior art, because the utility model has adopted flexible reactive power compensating module and classification reactive compensation module simultaneously, so both can retain the high reliability of classification reactive power compensation, advantage cheaply, there is again the quick continuously adjustable function of static reacance generator.The utility model can be applied in electric power low-voltage distribution system, can need dynamically output reactive power rapidly, continuously according to system, and offset with System Reactive Power power, reach improve power factor, reduce line loss, the energy-conservation and effect that reduces the wastage.
Accompanying drawing explanation
Fig. 1 is the general illustration of a kind of flexible low pressure and low power factor compensation device of the utility model;
Fig. 2 is the electrical schematic diagram of a kind of flexible low pressure and low power factor compensation device of the utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is specifically described.
As depicted in figs. 1 and 2, a kind of flexible low pressure and low power factor compensation device, it is comprised of flexible reactive power compensating module 1, classification reactive compensation module 2, master controller 3 and lead-in circuit breaker 4, and flexible reactive power compensating module 1 is in parallel with classification reactive compensation module 2 accesses electrical network through lead-in circuit breaker 4.
Wherein, flexible reactive power compensating module 1 is comprised of three groups of inductance, three phase full bridge conversion module, DC voltage-stabilizing capacitor group, driver element.The control signal input of driver element output access three phase full bridge conversion module, the output of three phase full bridge conversion module connects the input of three groups of inductance, the output of three groups of inductance is connected to the grid, the DC bus end of DC voltage-stabilizing capacitor group access three phase full bridge conversion module.
Classification reactive compensation module 2 is comprised of the resonance eliminating type compensating unit of multiple zero passage thyristor throw-cut switches, multiple multiple reactors of having connected.Zero passage thyristor throw-cut switch input terminal is connected to the grid, and the output of zero passage thyristor throw-cut switch accesses the input of the resonance eliminating type compensating unit of multiple reactors of having connected.
Master controller 3 is comprised of digital signal processor, detecting signal unit, current tracking control unit, DC control unit, protected location, switching control unit and display monitoring unit.Current transformer signal and voltage signal access detecting signal unit; by incoming digital signal processor after detecting signal unit filtering; after the judgement of the AD of digital signal processor data processing and the processing of digital control ring, access respectively current tracking control unit, DC control unit, protected location, switching control unit and display monitoring unit.
The compensation way that the utility model adopts classification Passive Reactive Power Compensation to combine with flexible stepless reactive power compensation.When idle variation in electrical network, first master controller calculates the idle amount that needs compensation, if while needing the idle amount of compensation to be greater than classification step-length, master controller calculates switching compound mode, thereby controls classification Passive Reactive Power Compensation switching; When compensating in certain limit, while needing accuracy compensation, the flexible stepless reactive compensation module of main controller controls carries out reactive power compensation.
Claims (4)
1. a flexible low pressure and low power compensation arrangement, described device is arranged in electrical network, it is characterized in that: comprise flexible reactive power compensating module, classification reactive compensation module, master controller and lead-in circuit breaker; Wherein, described classification reactive compensation module is for carrying out the total reactive power compensation of electrical network, and described flexible reactive power compensating module is for precision reactive power compensation; The input of described master controller is connected with electrical network, the output of described master controller is connected with the input of flexible reactive power compensating module and classification reactive compensation module respectively, and the output of described flexible reactive power compensating module is in parallel with classification reactive compensation module through lead-in circuit breaker access electrical network.
2. the flexible low pressure and low power compensation arrangement of kind according to claim 1, is characterized in that: described flexible reactive power compensating module comprises three groups of inductance, three phase full bridge conversion module, DC voltage-stabilizing capacitance group, driver element; The input of described driver element is connected with the output of described master controller, the input of the output access three phase full bridge conversion module of described driver element, the output of described three phase full bridge conversion module is connected with the input of described every group of inductance, the output of described every group of inductance is connected to the grid respectively, the DC bus end of described DC voltage-stabilizing capacitance group access three phase full bridge conversion module; Wherein, described classification reactive compensation module comprises multiple switchings unit, multiple compensating units of being connected with switching unit respectively; The input of described switching unit is connected with electrical network, and the output of described switching unit is connected with the output of described compensating unit.
3. the flexible low pressure and low power compensation arrangement of kind according to claim 1 and 2, it is characterized in that: described master controller comprises digital signal processor, detecting signal unit, current tracking control unit, DC control unit, protected location, switching control unit and display monitoring unit, current transformer signal and voltage signal access described detecting signal unit, by incoming digital signal processor after described detecting signal unit filtering, after digital signal processor, access respectively described current tracking control unit, DC control unit, protected location, switching control unit and display monitoring unit.
4. the flexible low pressure and low power compensation arrangement of kind according to claim 2, is characterized in that: the switching unit in described classification reactive compensation module is zero passage thyristor throw-cut switch; Described compensating unit is the resonance eliminating type compensating unit of the multiple reactors of series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320639453.XU CN203589734U (en) | 2013-10-17 | 2013-10-17 | Flexible low-voltage power compensation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320639453.XU CN203589734U (en) | 2013-10-17 | 2013-10-17 | Flexible low-voltage power compensation device |
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| CN203589734U true CN203589734U (en) | 2014-05-07 |
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| CN201320639453.XU Expired - Lifetime CN203589734U (en) | 2013-10-17 | 2013-10-17 | Flexible low-voltage power compensation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300549A (en) * | 2014-08-13 | 2015-01-21 | 上海致维电气有限公司 | Reactive power compensation device |
| CN106026837A (en) * | 2016-07-14 | 2016-10-12 | 哈尔滨兴亚技术有限公司 | Power driver |
-
2013
- 2013-10-17 CN CN201320639453.XU patent/CN203589734U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300549A (en) * | 2014-08-13 | 2015-01-21 | 上海致维电气有限公司 | Reactive power compensation device |
| CN106026837A (en) * | 2016-07-14 | 2016-10-12 | 哈尔滨兴亚技术有限公司 | Power driver |
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Granted publication date: 20140507 |
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| CX01 | Expiry of patent term |