CN101521381B - Composite device for active dynamic reactive power compensation and filtering - Google Patents
Composite device for active dynamic reactive power compensation and filtering Download PDFInfo
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- CN101521381B CN101521381B CN2008100338845A CN200810033884A CN101521381B CN 101521381 B CN101521381 B CN 101521381B CN 2008100338845 A CN2008100338845 A CN 2008100338845A CN 200810033884 A CN200810033884 A CN 200810033884A CN 101521381 B CN101521381 B CN 101521381B
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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
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Abstract
The invention relates to a composite device used for solving the transient compact of voltage and current in a grid system, improving the power factor, as well as filtering harmonic waves. The invention optimally combines the passive filter compensation and active compensation technology, and uses a passive filtering device to filter waves and carry out the fixed-capacity reactive power compensation. The invention also uses the property that the fast movement of an active compensation device can provide inductance reactive power or capacitive reactive power as a dynamic reactive power regulator to accurately regulate the reactive power of the system, thereby improving the power actor of the system, filtering the harmonic waves, and solving the problem of the flickering fluctuation of voltage and current.
Description
Affiliated technical field
The present invention relates to a kind of device that improves power grid quality, it is to solve electric current and voltage transition in the network system to impact, improve power factor and take into account the integration unit of filtering harmonic wave.
Background technology
Along with improving constantly of industrial production automation degree, nonlinear load produces a large amount of higher harmonic currents, thereby causes that network system voltage and current waveform distorts, and makes electrical network be subjected to severe contamination.The voltage and current wave distortion is a large power-consuming equipment common problem in service in the industrial and mining enterprises, and it causes power consumption equipment loss increase, power factor to reduce, break down or damage.Electric current and voltage transition and distortion are dynamic processes, frequency is fast, the frequency is high, impact is big, adopt the method for switched capacitor series reactor to realize passive filtering and reactive power compensation at present, its filtration efficiency, harmonic filtration rate, compensation effect and response time etc. all can not meet the demands, and the amplification of branch road overload and local harmonic wave also may occur and influence the reliability of system.
Summary of the invention
In order to overcome the deficiency of existing passive filtering and reactive power compensation, the invention provides the active reactive power compensation that combines of a kind of comprehensive active compensation and the passive filtering compensation filtering integration unit of holding concurrently.
The technical solution adopted in the present invention is: with passive filtering compensation and the combination of active compensation technical optimization, utilize the passive filtering compensation arrangement to carry out filtering and the reactive power compensation of fixed capacity is provided, the performance that perception or capacitive reactive power dynamically are provided fast of utilizing the active compensation device is as the dynamic reactive power adjuster reactive power of bucking-out system rapidly and accurately.
The invention has the beneficial effects as follows that the present invention can improve the power factor of system and take into account the filtering harmonic wave and solve electric current and voltage flickering fluctuation problem, the situation that also can avoid present compensation condenser often to damage.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and instance data the present invention is further described.
In Fig. 1, three passive filterings and compensation branch road insert for a long time, and the reactive power of fixing 600kvar capacitive and filtering 5 times, 7 times, 11 subharmonic are provided.The active compensation device mainly is made up of required offset current computing circuit and offset current generation circuit.Required offset current computing circuit can calculate the reactive current of required compensation fast according to the instantaneous reactive situation in several milliseconds of times.Offset current generation circuit is made up of current output circuit, drive circuit, current tracking circuit and control circuit, according to required offset current calculated value of previous moment and the actual current value that affords redress, in time provides next offset current constantly.If the reactive power of load is 0, this moment, the active compensation device promptly provided the reactive power of 600kvar perception and the capacitive reactive power of former fixedly input compensation to offset, and made the reactive power of system be maintained 0.If the reactive power of load is perceptual 300kvar, this moment, the active compensation device provided the reactive power of 300kvar perception, and both lagging reactive power sums still offset with above-mentioned capacitive reactive power, and keeping the reactive power of system still is 0.If the reactive power of load is perceptual 900kvar, this moment, the active compensation device provided the reactive power of 300kvar capacitive, and the reactive power that still keeps system is 0.If the reactive power of load is perceptual 1100kvar, this moment, the active compensation device provided the reactive power of 500kvar capacitive, still made the reactive power of system remain 0.In the whole working condition process, the present invention can eliminate reactive power impact and harmonic wave substantially, and the reactive power of system remains 0 substantially.
Claims (1)
1. one kind solves electric current and voltage transition in the network system and impacts, improves power factor and take into account the integration unit of filtering harmonic wave, comprise passive filtering compensation branch road and active compensation circuit arrangement, it is characterized in that, three passive filterings and compensation branch road insert for a long time, and the reactive power of fixing 600kvar capacitive and filtering 5 times, 7 times, 11 subharmonic are provided; The active compensation circuit arrangement is made up of offset current computing circuit and offset current generation circuit, and the offset current computing circuit calculates the reactive current of required compensation fast according to the instantaneous reactive situation in several milliseconds; Offset current generation circuit is made up of current output circuit, drive circuit, current tracking circuit and control circuit, according to required offset current calculated value of previous moment and the actual current value that affords redress, in time provides next offset current constantly; If the reactive power of load is 0, this moment, the active compensation circuit arrangement promptly provided the reactive power of 600kvar perception and the capacitive reactive power of former fixedly input compensation to offset, and made the reactive power of system be maintained 0; If the reactive power of load is perceptual 300kvar, this moment, the active compensation circuit arrangement provided the reactive power of 300kvar perception, and both lagging reactive power sums still offset with above-mentioned capacitive reactive power, and keeping the reactive power of system still is 0; If the reactive power of load is perceptual 900kvar, this moment, the active compensation circuit arrangement provided the reactive power of 300kvar capacitive, and the reactive power that still keeps system is 0; If the reactive power of load is perceptual 1100kvar, this moment, the active compensation circuit arrangement provided the reactive power of 500kvar capacitive, and the reactive power that still keeps system is 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100338845A CN101521381B (en) | 2008-02-26 | 2008-02-26 | Composite device for active dynamic reactive power compensation and filtering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100338845A CN101521381B (en) | 2008-02-26 | 2008-02-26 | Composite device for active dynamic reactive power compensation and filtering |
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| Publication Number | Publication Date |
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| CN101521381A CN101521381A (en) | 2009-09-02 |
| CN101521381B true CN101521381B (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100338845A Active CN101521381B (en) | 2008-02-26 | 2008-02-26 | Composite device for active dynamic reactive power compensation and filtering |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989746A (en) * | 2010-11-10 | 2011-03-23 | 国网南自控股（杭州）有限公司 | On-line dynamic harmonic treatment device |
| CN102709914B (en) * | 2012-07-09 | 2015-03-04 | 上海稳利达科技股份有限公司 | Filtering and reactive power compensation controller and compensation control method for power system |
| CN102904287B (en) * | 2012-09-27 | 2015-06-10 | 中国电力科学研究院 | Coordination control method for flexible alternate current transmission system (FACTS) devices of new energy delivery system |
| CN106655218A (en) * | 2017-03-26 | 2017-05-10 | 湖北波宏电气有限公司 | Hybrid filtering compensation device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1734878A (en) * | 2005-07-18 | 2006-02-15 | 西安交通大学 | Control method for restraining oscillate based on mixed electric power filter |
| CN2796213Y (en) * | 2005-05-27 | 2006-07-12 | 湖南大学 | Mixed high power active power filter |
| CN101068082A (en) * | 2007-03-28 | 2007-11-07 | 中国南车集团株洲电力机车研究所 | Comprehensive compensating device and method |
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- 2008-02-26 CN CN2008100338845A patent/CN101521381B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2796213Y (en) * | 2005-05-27 | 2006-07-12 | 湖南大学 | Mixed high power active power filter |
| CN1734878A (en) * | 2005-07-18 | 2006-02-15 | 西安交通大学 | Control method for restraining oscillate based on mixed electric power filter |
| CN101068082A (en) * | 2007-03-28 | 2007-11-07 | 中国南车集团株洲电力机车研究所 | Comprehensive compensating device and method |
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| CN101521381A (en) | 2009-09-02 |
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