CN202495769U - Active harmonic reactive power compensation cabinet for power grid - Google Patents
Active harmonic reactive power compensation cabinet for power grid Download PDFInfo
- Publication number
- CN202495769U CN202495769U CN2012201072111U CN201220107211U CN202495769U CN 202495769 U CN202495769 U CN 202495769U CN 2012201072111 U CN2012201072111 U CN 2012201072111U CN 201220107211 U CN201220107211 U CN 201220107211U CN 202495769 U CN202495769 U CN 202495769U
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- CN
- China
- Prior art keywords
- reactive power
- inverter circuit
- compensation cabinet
- power compensation
- power grid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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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- 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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model relates to an active harmonic reactive power compensation cabinet for a power grid. The compensation cabinet is in parallel connection with a power grid line and comprises an input transformer, a detection control circuit, an inverter circuit, and an output reactor which are connected in order. Both the input transformer and the output reactor are connected with the power grid line. The input transformer reduces voltage of the power grid line and inputs the voltage to the detection control circuit. The detection control circuit detects load current information, calculates harmonic components of load current according to the load current information and outputs a corresponding PWM signal to the inverter circuit simultaneously. The inverter circuit outputs compensation current to the power grid line through the output reactor according to the PWM signal. Compared with the prior art, according to the utility model, through the detection control circuit and the inverter circuit, bidirectional regulation of inductive and capacitive reactive power are realized rapidly and continuously, and through a split phase compensation operation mode, three-phase load unbalance and reactive power and harmonic wave comprehensive compensation can be realized.
Description
Technical field
The utility model relates to a kind of reactive power compensator, especially relates to the active harmonics reactive power compensation cabinet that is used for electrical network.
Background technology
Along with the raising of development of modern industry and living standards of the people, also increasingly high to the requirement of the quality of power supply.Therefore improve constantly the task of top priority that power supply quality becomes power department.Reactive balance harmonic content is two important indicators weighing Economical Operation of Power Systems.
In the modern industry system, all belong to the nonlinear-load of dynamic change such as electric furnace arrangement for producing steel, electric railway, reversible heavy (merchant) mill etc.The characteristics of this type load are meritorious and reactive power intercropping at any time changes fast; Cause supply power voltage fluctuation and flickering, the wave distortion of supply power voltage, power factor worsens and uncompensated load causes the dynamic unbalance of three phase supply voltage, thereby the electrical network quality of power supply is degenerated.
Conventional method is to adopt static reacance power compensator and filter to realize the function of systems stabilisation voltage and filtering harmonic, like TCR-FC.This device has its intrinsic defective: response speed is slow, cost is high, the compensation capacity influence by voltage is bigger etc.
The utility model content
The purpose of the utility model is exactly the active harmonics reactive power compensation cabinet that is provided for electrical network for the defective that overcomes above-mentioned prior art existence.
The purpose of the utility model can realize through following technical scheme:
A kind of active harmonics reactive power compensation cabinet that is used for electrical network; This compensating cabinet is connected in parallel on the power network line; Comprise the input transformer, detection control circuit, inverter circuit, the out put reactor that connect successively, described input transformer all is connected power network line with out put reactor, and input detected control circuit after input transformer carried out step-down with the voltage on the power network line; Detect control circuit and detect load current information; And according to the harmonic components of this load current information calculations load current, the corresponding pwm signal of output is simultaneously given inverter circuit, inverter circuit according to pwm signal via out put reactor output offset current to power network line.
Described detection control circuit comprises current transformer, analog to digital converter and control chip; Described current transformer, analog to digital converter and control chip are connected successively; Current transformer is gathered load current information, and the analog signal that will comprise load current information exports analog to digital converter to, convert digital signal into through analog to digital converter after; Be sent to the harmonic components of control chip computational load electric current, simultaneously the corresponding pwm signal of output.
Described control chip comprises dsp chip and ARM chip; Described dsp chip is used for the harmonic components according to load current information calculations load current; And producing corresponding pwm signal, described ARM chip is provided with RS232, RS485 and RJ45 interface, is used to connect ancillary equipment.
Described inverter circuit comprises three phase full bridge inverter circuit and dc capacitor, and described dc capacitor is connected in parallel on three phase full bridge inverter circuit input.
Described three phase full bridge inverter circuit is from the commutation bridge circuit.
The semiconductor device of described three phase full bridge inverter circuit is IGBT.
Described compensating cabinet also comprises display module, this display module joint detection control circuit.
Compared with prior art; The control of the utility model through compensating cabinet is produced the phase place and the amplitude of alternating voltage first-harmonic; Come control ac-side current indirectly; Bidirectional modulation through realizing perception and capacitive reactive power rapidly, continuously based on the Detecting Reactive Current control circuit and the inverter circuit of instantaneous reactive power theory through the phase splitting compensation operational mode, can realize the asymmetric and idle harmonic comprehensive compensation of three-phase load.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
Embodiment
As shown in Figure 1, be used for the active harmonics reactive power compensation cabinet of electrical network, this compensating cabinet is connected in parallel on the power network line 6, comprises the input transformer 1 that connects successively, detects control circuit 2, inverter circuit 3, out put reactor 4.Input transformer 1 all is connected power network line 6 with out put reactor 4; Input detected control circuit 2 after input transformer 1 carried out step-down with the voltage on the power network line 6; Detect control circuit 2 and detect load current information; And according to the harmonic components of this load current information calculations load current, the corresponding pwm signal of output is simultaneously given inverter circuit 3, inverter circuit 3 according to pwm signal via out put reactor 4 output offset current to power network lines 6.
Wherein, Detect control circuit 2 and comprise current transformer, analog to digital converter and control chip, current transformer, analog to digital converter and control chip are connected successively, and current transformer is gathered load current information; The analog signal that will comprise load current information exports analog to digital converter to; After converting digital signal into through analog to digital converter, be sent to the harmonic components of control chip computational load electric current, simultaneously the corresponding pwm signal of output.
Control chip comprises dsp chip and ARM chip; Dsp chip is used for the harmonic components according to load current information calculations load current; Major function is: the trigger impulse that 1) produces certain rule; Amplify through the gate leve drive circuit, conducting and the shutoff of control IGBT make compensating cabinet produce corresponding pwm signal; 2) synchronous voltage signal of fetching according to electrical network produces synchronization pulse, makes the PWM ripple of generation and line voltage keep making correctly and being incorporated into the power networks synchronously; 3) the phase angle δ of control compensation cabinet PWM ripple and line voltage accurately controls reactive power output, and the ARM chip is provided with RS232, RS485 and RJ45 interface, is used to connect display module 5 ancillary equipment such as grade.
Inverter circuit comprises three phase full bridge inverter circuit and the dc capacitor that is made up of six IGBT, and described dc capacitor is connected in parallel on three phase full bridge inverter circuit input.
Claims (7)
1. active harmonics reactive power compensation cabinet that is used for electrical network; This compensating cabinet is connected in parallel on the power network line; It is characterized in that; Described compensating cabinet comprises input transformer, detection control circuit, inverter circuit, the out put reactor that connects successively, and described input transformer all is connected power network line with out put reactor.
2. the active harmonics reactive power compensation cabinet that is used for electrical network according to claim 1 is characterized in that, comprises the current transformer, analog to digital converter and the control chip that connect successively.
3. the active harmonics reactive power compensation cabinet that is used for electrical network according to claim 2 is characterized in that described control chip comprises dsp chip and ARM chip, and this ARM chip is provided with RS232, RS485 and the RJ45 interface that is used to connect ancillary equipment.
4. a kind of low pressure Real-time and Dynamic active harmonics reactive power compensation cabinet according to claim 1 is characterized in that described inverter circuit comprises three phase full bridge inverter circuit and dc capacitor, and described dc capacitor is connected in parallel on three phase full bridge inverter circuit input.
5. a kind of low pressure Real-time and Dynamic active harmonics reactive power compensation cabinet according to claim 4 is characterized in that described three phase full bridge inverter circuit is from the commutation bridge circuit.
6. a kind of low pressure Real-time and Dynamic active harmonics reactive power compensation cabinet according to claim 4 is characterized in that the semiconductor device of described three phase full bridge inverter circuit is IGBT.
7. a kind of low pressure Real-time and Dynamic active harmonics reactive power compensation cabinet according to claim 1 is characterized in that described compensating cabinet also comprises display module, this display module joint detection control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201072111U CN202495769U (en) | 2012-03-20 | 2012-03-20 | Active harmonic reactive power compensation cabinet for power grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201072111U CN202495769U (en) | 2012-03-20 | 2012-03-20 | Active harmonic reactive power compensation cabinet for power grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202495769U true CN202495769U (en) | 2012-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201072111U Expired - Lifetime CN202495769U (en) | 2012-03-20 | 2012-03-20 | Active harmonic reactive power compensation cabinet for power grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202495769U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066610A (en) * | 2012-12-23 | 2013-04-24 | 上海市电力公司 | Flexible reactive compensation device |
-
2012
- 2012-03-20 CN CN2012201072111U patent/CN202495769U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066610A (en) * | 2012-12-23 | 2013-04-24 | 上海市电力公司 | Flexible reactive compensation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: LIVESINE ELECTRIC (SHANGHAI) CO., LTD. Free format text: FORMER NAME: SHANGHAI DOUBLE X TECHNOLOGY CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 201108 Shanghai, Minhang District, Hong Jian Road, No. third, building 1, building 99, 2 Patentee after: Leith electric (Shanghai) Co. Ltd. Address before: 200240 C building, No. 4299 Jin Du Road, Shanghai, Minhang District, 1-773 Patentee before: Shanghai Double X Technology Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20121017 |
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| CX01 | Expiry of patent term |