CN2773969Y - Electricity-energy quality flexible controller - Google Patents
Electricity-energy quality flexible controller Download PDFInfo
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- CN2773969Y CN2773969Y CN 200420058664 CN200420058664U CN2773969Y CN 2773969 Y CN2773969 Y CN 2773969Y CN 200420058664 CN200420058664 CN 200420058664 CN 200420058664 U CN200420058664 U CN 200420058664U CN 2773969 Y CN2773969 Y CN 2773969Y
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Abstract
The utility model discloses a flexible controller for electricity energy quality, which comprises a metering circuit, a control circuit, an IGBT bridge inverter and a reactor, wherein a voltage signal and a current signal are sampled by the metering circuit and input to the control circuit to be processed. The output voltage of the IGBT bridge inverter is regulated by the control circuit according to the processed result, is converted to an electric current by the reactor, and is stacked onto a load side electric current. Needed electric quantity is collected by the utility model from an electric network and is converted into number quantity by AD, power to be compensated is calculated, and the power is converted into a control signal of an IGBT bridge. A switch of the IGBT bridge is controlled by PWM signals emitted by the control circuit, and the PWM signals are switched at high speed. Thus, idle work and harmonic power are offered to a load to obtain the purposes of cleaning the electric network, decreasing loss and enhancing the electricity energy quality.
Description
Technical field
The utility model relates to a kind of comprehensive compensating device of electric power system.
Background technology
The employing power electronic equipment is handled up idle nearby and is absorbed the harmonic current that harmonic source produced, and is the effective measures that improve power factor and inhibition harmonic pollution, and harmonic wave control and reactive power compensator are normally separately realized at present.
Low-voltage reactive compensator capable is realized 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, the 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 filtration unit 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
At the problem of above-mentioned existence, the purpose of this utility model is to provide a kind of quality of power supply to combine the Flexible Control device, and this device can recur and absorbing reactive power, and can eliminate system harmonics.
For achieving the above object, a kind of quality of power supply Flexible Control of the utility model device comprises:
Measuring circuit is used for measuring and extraction system side and load side voltage signal and current signal;
Control circuit 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 IGBT bridge inverter is 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 bridge inverter, and on the load-side electric current that is added to;
Wherein, behind described measuring circuit sampled voltage and the current signal, be input to described control circuit and handle, described control circuit is regulated the output voltage of described IGBT bridge inverter 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, also be in series with current-limiting resistance on the circuit of described IGBT bridge inverter.
Further, described DSP digital signal processing device is 16 bit DSP chip 3202407TMSLFA.
The utility model is gathered required electric weight from electrical network, be converted to digital quantity by AD, calculate the power that needs compensation, be converted to IGBT bridge control signal then, and send the pwm signal that switches at a high speed by control circuit and control the switch of IGBT bridge, thereby, reach the cleaning electrical network for load provides idle and harmonic power, reduce the wastage, improve the purpose of the quality of power supply; In addition, the utility model also has and suppresses the line voltage flickering, falls, and keeps the functions such as protection of the stable and overvoltage of voltage, under voltage, overcurrent, overheated, thunderbolt and phase shortage.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment:
As shown in Figure 1, 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;
IGBT bridge inverter 8 is 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 1 is converted to electric current with the output voltage signal of IGBT bridge inverter 8, and on the electric current of the load-side 3 that is added to;
Also be in series with current-limiting resistance 9 and electric capacity 7 on the circuit of IGBT bridge inverter 8, power circuit 4 is to control circuit 5 power supplies; Wherein, digital signal processor DSP adopts 16 bit DSP chip 3202407TMSLFA.
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 1, 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, thus realize balanced three-phase current, regulate power factor and suppress harmonic wave.During the cold start-up of this device, at first drop into current-limiting resistance 9, with the moment of suppress closing a floodgate 7 chargings cause to capacitor rush of current.
Claims (3)
1, a kind of quality of power supply Flexible Control 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 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 IGBT bridge inverter is 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 bridge inverter, and on the load-side electric current that is added to;
Wherein, behind described measuring circuit sampled voltage and the current signal, be input to described control circuit and handle, described control circuit is regulated the output voltage of described IGBT bridge inverter 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.
2, according to the described quality of power supply Flexible Control of claim 1 device, it is characterized in that, also be in series with current-limiting resistance on the circuit of described IGBT bridge inverter.
According to claim 1 or 2 described quality of power supply Flexible Control devices, it is characterized in that 3, described DSP digital signal processing device is 16 bit DSP chip 3202407TMSLFA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420058664 CN2773969Y (en) | 2004-12-14 | 2004-12-14 | Electricity-energy quality flexible controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420058664 CN2773969Y (en) | 2004-12-14 | 2004-12-14 | Electricity-energy quality flexible controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2773969Y true CN2773969Y (en) | 2006-04-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420058664 Expired - Fee Related CN2773969Y (en) | 2004-12-14 | 2004-12-14 | Electricity-energy quality flexible controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2773969Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100461581C (en) * | 2007-04-13 | 2009-02-11 | 哈尔滨工业大学 | Rotary electro magnetic electric energy quality comprehensive control device |
| CN101820172B (en) * | 2009-11-03 | 2012-05-30 | 华东电网有限公司 | Power grid flexible constraint integrated system |
| CN104993473A (en) * | 2015-05-28 | 2015-10-21 | 广西大学 | Three-phase electricity-saving compensation controller |
| CN105490290A (en) * | 2016-01-27 | 2016-04-13 | 国网浙江嘉善县供电公司 | Static reactive power compensator |
| WO2019047514A1 (en) * | 2017-09-07 | 2019-03-14 | 广东元森能源科技有限公司 | Energy-saving control system for heating apparatus |
-
2004
- 2004-12-14 CN CN 200420058664 patent/CN2773969Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100461581C (en) * | 2007-04-13 | 2009-02-11 | 哈尔滨工业大学 | Rotary electro magnetic electric energy quality comprehensive control device |
| CN101820172B (en) * | 2009-11-03 | 2012-05-30 | 华东电网有限公司 | Power grid flexible constraint integrated system |
| CN104993473A (en) * | 2015-05-28 | 2015-10-21 | 广西大学 | Three-phase electricity-saving compensation controller |
| CN105490290A (en) * | 2016-01-27 | 2016-04-13 | 国网浙江嘉善县供电公司 | Static reactive power compensator |
| WO2019047514A1 (en) * | 2017-09-07 | 2019-03-14 | 广东元森能源科技有限公司 | Energy-saving control system for heating apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |