CN201199635Y - Electric energy quality synthesis compensation apparatus - Google Patents
Electric energy quality synthesis compensation apparatus Download PDFInfo
- Publication number
- CN201199635Y CN201199635Y CNU2008200788471U CN200820078847U CN201199635Y CN 201199635 Y CN201199635 Y CN 201199635Y CN U2008200788471 U CNU2008200788471 U CN U2008200788471U CN 200820078847 U CN200820078847 U CN 200820078847U CN 201199635 Y CN201199635 Y CN 201199635Y
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- igbt
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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
Abstract
The utility model provides a unified power quality compensation device, which comprises a measuring circuit used for measuring and extracting the voltage signals and current signals at the systematical side and the loading side; a control circuit used for transforming the sampled voltage signals and current signals into digital signals, and outputting control signals after analysis and calculation; an IGBT four bridge-arm bi-level inverter that controls the turn-on and shutoff of the IGBT on the circuit bridge-arm according to the control signals output by the control circuit, a reactor that converts the output voltage signals of the IGBT four bridge-arm into current, and superimposes the current onto the current at the loading side; and a filter used for filtering out the harmonic wave at the loading side. The measure circuit inputs the voltage signals and current signals into the control circuit and processes after sampling, the control circuit adjusts the output voltage of IGBT four bridge-arm bi-level inverter according to the processed results, and the output voltage is transformed into current by the reactor and superimposed onto the current at the loading side.
Description
Technical field
The utility model relates to a kind of electric power energy-saving device that is used to improve the quality of power supply of low-voltage network, especially a kind of power quality comprehensive compensation device.
Background technology
Energy-saving and emission-reduction, utilizing clean energy resource is the basis that keeps sustainable economic development, and at power domain, electric energy loss mainly concentrates on low-voltage distribution system, and the loss that reduces low-voltage network of adopting an effective measure is the key of electric power energy-saving.
The power-saving technology of low-voltage network comprises three aspects: (1) adopts compensation arrangement to provide reactive power nearby in the position near reactive load, avoids reactive current to flow in low-voltage supply line, reduces line loss; (2) adopt compensation arrangement at position harmonic carcellation electric current, avoid the propagation of harmonic power in transformer and supply line, reduce harmonic loss near harmonic load; (3) adopt compensation arrangement balanced feeding circuit three phase power, reduce the electric current of center line, reach and reduce current in middle wire loss on the line.
Prior art mainly is to utilize " capacitor switching mode " to solve above-mentioned (1) to plant technical problem; Adopt " passive filter mode " to solve above-mentioned (2) and plant technical problem; And, good solution is not arranged as yet at present to (3) kind technical problem.
" capacitor switching mode " realizes with contactor or thyristor control capacitor group switching usually.Because capacitor group switching device operation principle is simple, small investment is effective, so it is extensively adopted by power department.But, thereby there is following shortcoming because it is to rely on Shunt Capacitor Unit that reactive power is provided:
1) response time long, want hundreds of millisecond usually, can not compensate dynamic reactive;
2) compensation capacity is subjected to the restriction of line voltage, and line voltage is low more, exports idle more for a short time, and that exactly need to electrical network output this moment is idle, in the hope of raising the line voltage level;
3) since to the electrical network parallel connection electric capacity, therefore might cause the harmonic wave amplification, even cause the resonance short circuit branch;
4) because the classification switching capacitance is limited by the capacitor rated capacity, the required idle certain difference that has of compensating reactive power capacity and system, it is very high that power factor can not be carried.
" passive filter " is to be formed by power capacitor, reactor and resistor combination.Passive filtering has small investment, efficient height, advantage such as simple in structure, reliable and easy to maintenance, so passive filtering is the main means of the inhibition harmonic wave that extensively adopts at present.Passive filter by in system for harmonic wave provides a low impedance path in parallel, playing filter action, its filtering characteristic is that the impedance ratio by system and filter is determined, thereby has following shortcoming:
1) harmonic characterisitic is subjected to influence on system parameters bigger;
2) specific several subharmonic can only be eliminated, and amplification can be produced some subharmonic;
3) filtering requirements and reactive power compensation, pressure regulation require to be difficult to sometimes coordinate;
When 4) harmonic current increased, the filter burden increased the weight of thereupon, may cause the filter overload;
5) effective high material consumption, volume is big.
The utility model content
Problem at above-mentioned existence, the purpose of this utility model is to provide a kind of comprehensive compensating device that can improve the quality of power supply of power distribution network fast, this device can the fast stepless difference ground Continuous Compensation reactive power, eliminate current harmonics, the balance three phase power, for the user provides high-quality electric energy, reduce the loss in the electric power transfer process simultaneously.
For achieving the above object, the utility model provides a kind of power quality comprehensive compensation device, comprising:
Measuring circuit is used for measuring and extraction system side and load side voltage signal and current signal;
Control circuit is used for changing the voltage signal and the current signal of sampling into digital signal, by analyzing and calculate and the output control signal;
The two electrical level inverters of IGBT four brachium pontis are according to the turn-on and turn-off of the IGBT on the control signal control circuit brachium pontis of control circuit output;
Reactor is converted to electric current with the output voltage signal of described IGBT four-leg inverter, and on the load-side electric current that is added to;
Filter is used for filtering load-side harmonic wave;
Wherein, behind described measuring circuit sampled voltage signal and the current signal, be input to described control circuit and handle, described control circuit is regulated the output voltage of the two electrical level inverters of described IGBT four brachium pontis according to the result after handling, change electric current into through described reactor, on the load-side that is added to the again electric current.
Further, control circuit comprises digital signal processor DSP and based on the control system of DSP.
Further, also be in series with current-limiting resistance on the circuit of described IGBT four-leg inverter.
Further, described digital signal processor DSP is 32 bit DSP chip TMS320LF2812.
The utility model can fully be realized compensating three-phase current unbalance, regulating system power factor, suppresses mains by harmonics and absorb or discharge to the indifference level reactive power fast continuously; In addition, the utility model can also suppress effectively line voltage flickering, fall or instantaneous power failure; Be not easy and electric network impedance generation resonance, and can follow the tracks of the variation of mains frequency; Stronger idle support still can be provided when voltage is low, and regulate continuously in can be from perception to the capacitive gamut, make its idle output be equivalent to 1.4～2 times with capacity Static Var Compensator (SVC).
Description of drawings
Accompanying drawing is the utility model schematic diagram.
Embodiment
As shown in drawings, the utility model comprises:
Measuring circuit 6 is used for measuring and extraction system side 2 and load-side 3 voltage signals and current signal;
Control circuit 5 comprises digital signal processor DSP and based on the control system of DSP, being used for the sampled analog signal transition is digital signal, by analyzing and calculate and the output control signal;
The two electrical level inverters 9 of IGBT four brachium pontis are according to the turn-on and turn-off of the IGBT on the control signal control circuit brachium pontis of control circuit 5 outputs;
Reactor 10 is converted to electric current with the output voltage signal of IGBT four-leg inverter 9, and on the electric current of the load-side 3 that is added to;
Also be in series with current-limiting resistance 8 on the circuit of the two electrical level inverters 9 of IGBT four brachium pontis, power circuit 4 is to control circuit 5 power supplies; Wherein, digital signal processor DSP adopts 32 bit DSP chip TMS320LF2812.
During the work of this device, control circuit 5 goes out the power of needs compensation according to the voltage and current calculated signals of measuring circuit 6 samplings, change position IGBT bridge control signal then, and the pwm signal that sends switching is at a high speed controlled the switch of IGBT bridge, behind the inductance of reactor 10, be converted to electric current, at last by with the stack of load-side 3 electric currents, size, phase place and the harmonic component of regulating system side 2 electric currents, thereby realize balanced three-phase current, regulate power factor and suppress harmonic wave, and by filter 1 offset current harmonic wave.During the cold start-up of this device, at first drop into current-limiting resistance 8, with the moment of suppress closing a floodgate 7 chargings cause to the direct current capacitor group rush of current.
Following table is this device and the comparison of traditional product in function and characteristics:
| Item compared | This device | TSC | SVC | PF |
| Actuation time | Several milliseconds | Several seconds | The hundreds of millisecond | A few tens of milliseconds |
| Absorb idle | Can | Cannot | Can | Cannot |
| Take place idle | Can | Can | Can | Can |
| There is not differential compensating reactive power | Can | Cannot | Can | Can |
| Compensation harmonic | Can | Cannot | Cannot | Can |
| Suppress voltage flicker | Can | Cannot | Cannot | Cannot |
| Cause the resonance short circuit | Impossible | May | May | May |
| Compensate uneven reactive power | Can | Can | Can | Cannot |
| Accurate Control of Voltage | Can | Cannot | Cannot | Cannot |
Annotate: TSC represents the capacitor group switching device, and SVC represents SVC, and PF represents Passive filtration unit.
Claims (4)
1. a power quality comprehensive compensation device is characterized in that, comprising:
Measuring circuit is used for measuring and extraction system side and load side voltage signal and current signal; Control circuit is used for changing the voltage signal and the current signal of sampling into digital signal, by analyzing and calculate and the output control signal, with the turn-on and turn-off of the two electrical level inverters of four brachium pontis of the IGBT on the control circuit brachium pontis;
Reactor is converted to electric current with the output voltage signal of described IGBT four-leg inverter, and on the load-side electric current that is added to;
Filter is used for filtering load-side harmonic wave.
2. power quality comprehensive compensation device according to claim 1 is characterized in that, control circuit comprises digital signal processor DSP and based on the control system of DSP.
3. power quality comprehensive compensation device according to claim 1 and 2 is characterized in that, also is in series with current-limiting resistance on the circuit of described IGBT four-leg inverter.
4. according to the described power quality comprehensive compensation device of claim 2, it is characterized in that described digital signal processor DSP is 32 bit DSP chip TMS320LF2812.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200788471U CN201199635Y (en) | 2008-01-31 | 2008-01-31 | Electric energy quality synthesis compensation apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200788471U CN201199635Y (en) | 2008-01-31 | 2008-01-31 | Electric energy quality synthesis compensation apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201199635Y true CN201199635Y (en) | 2009-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200788471U Expired - Lifetime CN201199635Y (en) | 2008-01-31 | 2008-01-31 | Electric energy quality synthesis compensation apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201199635Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624001A (en) * | 2012-04-20 | 2012-08-01 | 上海润珏机电科技有限公司 | Hybrid electric filtering device based on triple harmonic active filter |
| CN104777864A (en) * | 2015-04-20 | 2015-07-15 | 深圳市京泉华科技股份有限公司 | Power supply and output load regulation compensation circuit and voltage regulation method thereof |
| CN105071645A (en) * | 2015-08-06 | 2015-11-18 | 河南森源电气股份有限公司 | High-power photovoltaic grid-connected inverter |
| CN107437802A (en) * | 2017-06-23 | 2017-12-05 | 重庆涵瑞优能科技有限公司 | Low pressure digitizes distributed terminal utility power quality control system and control method |
| CN110707726A (en) * | 2019-12-02 | 2020-01-17 | 国网山东省电力公司电力科学研究院 | Multilayer reactive power compensation method based on large-scale offshore wind power output system |
-
2008
- 2008-01-31 CN CNU2008200788471U patent/CN201199635Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624001A (en) * | 2012-04-20 | 2012-08-01 | 上海润珏机电科技有限公司 | Hybrid electric filtering device based on triple harmonic active filter |
| CN102624001B (en) * | 2012-04-20 | 2014-10-15 | 上海润珏机电科技有限公司 | Hybrid electric filtering device based on triple harmonic active filter |
| CN104777864A (en) * | 2015-04-20 | 2015-07-15 | 深圳市京泉华科技股份有限公司 | Power supply and output load regulation compensation circuit and voltage regulation method thereof |
| CN105071645A (en) * | 2015-08-06 | 2015-11-18 | 河南森源电气股份有限公司 | High-power photovoltaic grid-connected inverter |
| CN107437802A (en) * | 2017-06-23 | 2017-12-05 | 重庆涵瑞优能科技有限公司 | Low pressure digitizes distributed terminal utility power quality control system and control method |
| CN107437802B (en) * | 2017-06-23 | 2020-02-11 | 博特尔(重庆)电力技术有限公司 | Low-voltage digital distributed terminal power quality control system and control method |
| CN110707726A (en) * | 2019-12-02 | 2020-01-17 | 国网山东省电力公司电力科学研究院 | Multilayer reactive power compensation method based on large-scale offshore wind power output system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING SHUIMUYUANHUA ELECTRIC APPLICANCE CO., LTD Free format text: FORMER OWNER: BEIJING SHUIMUYUANHUA SCIENCE AND TECHNOLOGY DEVELOPMENT CO., LTD. Effective date: 20090710 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090710 Address after: A, building 8, Dongsheng building, No. 616 East Zhongguancun Road, Beijing, Haidian District, 100083 Patentee after: Beijing Shuimu Yuanhua Electric Co., Ltd. Address before: 616, Dongsheng building, No. 8 East Zhongguancun Road, Beijing, Haidian District, China: 100022 Patentee before: Beijing Semeureka Technology Development Co., Ltd. |
|
| C56 | Change in the name or address of the patentee |
Owner name: BEIJING SEMEUREKA ELECTRIC CO., LTD. Free format text: FORMER NAME: BEIJING SHUIMU YUANHUA ELECTRIC CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 100094 No. 1, building 5, Yongfeng Road, Haidian District, Beijing, 301 Patentee after: BEIJING SEMEUREKA ELECTRICS CO., LTD. Address before: 100083, A, building 8, Dongsheng building, No. 616 East Zhongguancun Road, Beijing, Haidian District Patentee before: Beijing Shuimu Yuanhua Electric Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090225 |