CN102570473A - AC (alternate current) chopper type static reactive compensator - Google Patents
AC (alternate current) chopper type static reactive compensator Download PDFInfo
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- CN102570473A CN102570473A CN2010105880372A CN201010588037A CN102570473A CN 102570473 A CN102570473 A CN 102570473A CN 2010105880372 A CN2010105880372 A CN 2010105880372A CN 201010588037 A CN201010588037 A CN 201010588037A CN 102570473 A CN102570473 A CN 102570473A
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- static reactive
- compensation
- chopper
- chopper type
- type static
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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Abstract
The invention relates to an AC chopper type static reactive compensator, which reactively carries out static reactive compensation through adjusting the capacitance of a capacitive compensation branch circuit formed by an AC chopper and a capacitor that are connected in series. The AC chopper type static reactive compensator is suitable for the in situ compensation of an asynchronous motor, namely, has the functions of dynamically compensating the idling reactive power of the asynchronous motor, and dynamically compensating the reactive power consumed by the leakage resistance of a winding. The compensation effect of the AC chopper type static reactive compensator is improved by 40% compared with parallelly-connected capacitors; and further, during the process of carrying out the static reactive compensation, the AC chopper type static reactive compensator does not use a reactor and has no harmonic wave itself, therefore, the AC chopper type static reactive compensator is lowered by 50% in cost and by 80% in size compared with the present static reactive compensator.
Description
Technical field
The present invention relates to asynchronous motor static passive compensation device on the spot, relate in particular to a kind of AC chopping formula SVC.
Background technology
The ratio that asynchronous motor accounts in network load is great, and power factor is low, therefore becomes the main load or burden without work of urban and rural power grids and the main source that net at different levels decreases.It is putative effective reactive power compensation scheme that asynchronous motor is implemented reactive power compensation on the spot, and country classifies spot compensation of asynchronous motor as country already and promotes the economize on electricity project.
Reactive power compensation scheme on the spot at present commonly used is, directly is parallel to this motor with a capacitor that matches with the asynchronous motor characteristic, and scheme is an economy high efficient and reliable simply again.Problem is, adopts the shunt capacitor compensation scheme can only the unloaded reactive power of compensated motor, the reactive power that in the winding leakage reactance, consumes in the time of can not the compensated motor on-load, 60% of final compensated motor rated reactive power; And adopt the compensation of SVC scheme is the defective that can overcome shunt capacitor compensation effect difference; But because of cost is too high, volume hang-up too; Be difficult to use in spot compensation of asynchronous motor, the spot compensation of asynchronous motor long-term existence the problem of weak effect.
Summary of the invention
1. technical problem: the present invention provides a kind of solution to have the expensive and big volume difficult problem of SVC now, is used for the AC chopping formula SVC of spot compensation of asynchronous motor.
2. technical scheme: the capacitive compensation branch road that AC chopping formula SVC of the present invention is made up of AC chopper and capacitors in series; Capacitive reactive power through regulating the capacitive compensation branch road is implemented static reactive; It is characterized in that; AC chopper one end connects an end of asynchronous motor, and the AC chopper other end connects an end of capacitor, and the other end of capacitor connects the other end of asynchronous motor.
AC chopper among the present invention is obtained by two power switch pipe series connection; It is characterized in that; The drain electrode of a power switch pipe links to each other with the drain electrode of another power switch pipe; The source electrode of a power switch pipe is an end of two-way power switch, and the another power switch pipe is the other end of two-way power switch.
3. beneficial effect: the present invention compared with prior art has the following advantages:
(1) the present invention adopts the static var compensation compensation method, has realized being the unloaded reactive power of dynamic compensation asynchronous motor, the function of the reactive power that consumes of dynamic compensation winding leakage reactance again, and compensation effect improves 40% than shunt capacitor;
(2) the present invention implements not use reactor in the process of static reactive, therefore than the cost of existing SVC minimizing 40% and 60% volume;
(3) the no harmonic wave of the present invention self, therefore the economical passive filter of eliminating self harmonic wave reduces 10% cost and 20% volume again;
Description of drawings
Fig. 1 be in the AC chopping formula SVC of the present invention AC chopper with the organigram of two-way power switch.
Fig. 2 is an AC chopping formula SVC schematic diagram of the present invention.
Main designation in the above-mentioned accompanying drawing: S1---AC chopper, C---capacitor, u
F---alternating current input power supplying phase voltage, i
L---the load phase current.
Embodiment
Specify the embodiment of two technical schemes with reference to accompanying drawing:
AC chopping formula SVC schematic diagram, as shown in Figure 3.AC chopper S1 one end connects alternating current input power supplying phase voltage u
F, the other end connects the end of capacitor C, has formed the capacitive compensation branch road by AC chopper and capacitors in series.
The operation principle of AC chopping formula SVC is that power factor controller is according to alternating current input power supplying phase voltage u
FWith load phase current i
LPhase difference, obtain the equivalent susceptance value that inserts electrical network, and then convert the equivalent susceptance value to the PWM duty cycle signals according to predetermined relation, the control AC chopping is regulated the capacitive compensation branch road and is implemented dynamic reactive and regulate.
Claims (2)
1. the capacitive compensation branch road that AC chopping formula SVC of the present invention is made up of AC chopper and capacitors in series; Capacitive reactive power through regulating the capacitive compensation branch road is implemented static reactive; It is characterized in that; AC chopper one end connects an end of asynchronous motor, and the AC chopper other end connects an end of capacitor, and the other end of capacitor connects the other end of asynchronous motor.
2. the AC chopper among the present invention is obtained by two power switch pipe series connection; It is characterized in that; The drain electrode of a power switch pipe links to each other with the drain electrode of another power switch pipe; The source electrode of a power switch pipe is an end of two-way power switch, and the another power switch pipe is the other end of two-way power switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105880372A CN102570473A (en) | 2010-12-15 | 2010-12-15 | AC (alternate current) chopper type static reactive compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105880372A CN102570473A (en) | 2010-12-15 | 2010-12-15 | AC (alternate current) chopper type static reactive compensator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102570473A true CN102570473A (en) | 2012-07-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105880372A Pending CN102570473A (en) | 2010-12-15 | 2010-12-15 | AC (alternate current) chopper type static reactive compensator |
Country Status (1)
| Country | Link |
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| CN (1) | CN102570473A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112952804A (en) * | 2021-02-07 | 2021-06-11 | 东北电力大学 | Chopper controllable impedor based on two-level differential direct AC/AC conversion |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006109649A (en) * | 2004-10-07 | 2006-04-20 | Selva:Kk | Generator-capacity reducing device |
| CN2904463Y (en) * | 2005-06-28 | 2007-05-23 | 张镇强 | AC power regulating switch |
| CN101588072A (en) * | 2008-01-11 | 2009-11-25 | 北京博旺天成科技发展有限公司 | Novel energy-saving power regulator |
-
2010
- 2010-12-15 CN CN2010105880372A patent/CN102570473A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006109649A (en) * | 2004-10-07 | 2006-04-20 | Selva:Kk | Generator-capacity reducing device |
| CN2904463Y (en) * | 2005-06-28 | 2007-05-23 | 张镇强 | AC power regulating switch |
| CN101588072A (en) * | 2008-01-11 | 2009-11-25 | 北京博旺天成科技发展有限公司 | Novel energy-saving power regulator |
Non-Patent Citations (1)
| Title |
|---|
| 刘玉雷等: "静止无功补偿器用于抑制厂用电系统电压波动仿真", 《电力系统自动化》, vol. 30, no. 16, 25 August 2006 (2006-08-25) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112952804A (en) * | 2021-02-07 | 2021-06-11 | 东北电力大学 | Chopper controllable impedor based on two-level differential direct AC/AC conversion |
| CN112952804B (en) * | 2021-02-07 | 2023-04-11 | 东北电力大学 | Chopper controllable impedor based on two-level differential direct AC/AC conversion |
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Application publication date: 20120711 |