CN2907030Y - Low-harmonic variable-frequency speed regulator with reactive power compensation function - Google Patents
Low-harmonic variable-frequency speed regulator with reactive power compensation function Download PDFInfo
- Publication number
- CN2907030Y CN2907030Y CNU2006200597583U CN200620059758U CN2907030Y CN 2907030 Y CN2907030 Y CN 2907030Y CN U2006200597583 U CNU2006200597583 U CN U2006200597583U CN 200620059758 U CN200620059758 U CN 200620059758U CN 2907030 Y CN2907030 Y CN 2907030Y
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- reactive power
- dsp processor
- rectifier
- power compensation
- current
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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
Abstract
The utility model discloses a low harmonic frequency governor with reactive power compensation, which comprises a power converter used to convert the three-phase electricity into direct current, a inverter used to invert the DC output by the power converter into three-phase electricity used for loading, and a DSP processor. The current and voltage outputted from the grid into the power converter is inputted into the DSP processor after being detected by current and voltage sensor module, the data is processed by the DSP processor, then pulse width drive signal outputted by DSP modulates is closed by the IGBT switch group in power converter through optically coupled driven circuit model, when the required reactive compensation for the grid is detected by the detection circuit of the power converter end, the PWM can realize the dynamic reactive compensation with no harmonic wave due to the PWM power converter can make power flow in four-quadrant, then, the relevant PWM drive signal is outputted by the DSP chip, enabling the power converter to make reactive compensation to the electric network.
Description
Technical field
The utility model relates to the variable-frequency governor in a kind of power electronic device, relates in particular to the low harmonic conversion speed regulator with reactive power compensation.
Background technology
Variable-frequency governor is extensive use on all kinds of motor loads, the function admirable energy-saving effect is obvious, but now the structure of making the variable-frequency governor of load applications at all kinds of motor loads is to carry out DC filtering with electric capacity after rectifier rectification, because the existence of inverter, the switching device that high frequency is arranged in the inverter, this just makes and produces high-frequency current in the centre, there is no special function aspect reactive power.
The utility model content
The purpose of this utility model is to provide a kind of low harmonic conversion speed regulator with reactive power compensation.
The purpose of this utility model can be achieved through the following technical solutions, a kind of low harmonic conversion speed regulator of reactive power compensation, comprise the rectifier that is used for three-phase electricity is converted to direct current, be used for the dc inversion of rectifier output is become the inverter and the dsp processor of the required three-phase electricity of load, the current/voltage of electrical network input rectifier inserts dsp processor after the current/voltage sensor assembly detects, the closure of the IGBT switches set of the pulse width modulated drive signal of data through exporting after the DSP resume module in optocoupler drive circuit module driving rectifier, if the testing circuit of rectifier terminal detects electrical network when need carry out reactive power compensation, because PWM drives rectifier the energy four-quadrant is flowed, so it can realize not having the dynamic passive compensation of harmonic wave, at this moment, dsp chip can be exported corresponding PWM drive signal, makes rectifier carry out reactive power compensation to electrical network.
The interchange end that described inverter is exported is connected with current sensor, and current sensor carries out the corresponding input interface that current sample is input to dsp processor to the interchange end of inverter output, realizes closed-loop control, makes the control of rectifier real-time more and accurate.
The output of described current sensor module connects fault diagnosis circuit, the output signal of fault diagnosis circuit inserts the corresponding input interface of dsp processor, fault diagnosis circuit can detect the unusual of electric current and notify dsp processor, thereby dsp processor can be taked corresponding countermeasure.
The dc output end of described rectifier compares with ideal value, thereby realizes real-time closed-loop control through the respective input mouth of capacitance voltage access dsp processor; The effect of the electric capacity of dc terminal is to realize holding discharge to obtain smooth direct current output.
Described dsp processor is connected with keyboard through communication interface, and the user can be by the frequency of keyboard to set up reactive power and frequency converter.
Compared with prior art, advantage of the present utility model:
1, owing to come output pulse width modulated drive signal (PWM) to drive rectifier according to the sample rate current voltage of electrical network input rectifier, realizes reactive power compensation to electrical network by dsp processor;
2, owing to have the function that harmonic wave detects, also can be used as low harmmonic constant and use;
3, intelligentized man-machine interface, reactive power also can change by external demand, and the user can control automatically;
4, few to the mains by harmonics interference.
Description of drawings
Fig. 1 is an operation principle block diagram of the present utility model.
Embodiment
As shown in Figure 1, a kind of low harmonic conversion speed regulator of reactive power compensation, mainly comprise the rectifier that is used for three-phase electricity is converted to direct current, be used for the dc inversion of rectifier output is become the inverter and the dsp processor of the required three-phase electricity of load, it is the programmable, intelligent power model of PIIPM50P12B004 that rectifier and inverter adopt model, realizes the rectification of high power factor and low harmonic wave.It is TMSLF2407 that dsp processor adopts model.The current/voltage of electrical network input rectifier inserts dsp processor after the current/voltage sensor assembly detects, data are exported 6 tunnel pulse-width modulations (PWM) drive signal and are driven the programmable, intelligent power model by the optocoupler drive circuit module after the DSP resume module, thereby drive the closure of IGBT switches set, if the testing circuit of rectifier terminal detects electrical network when need carry out reactive power compensation, because PWM drives rectifier the energy four-quadrant is flowed, so it can realize not having the dynamic passive compensation of harmonic wave, at this moment, dsp processor can be exported corresponding PWM drive signal, makes rectifier carry out reactive power compensation to electrical network.The voltage of the electrochemical capacitor of the dc terminal of rectifier also through sampling dsp processor, compares with ideal value, thereby realizes real-time closed-loop control, and the effect of the electric capacity of dc terminal is to realize holding discharge to obtain smooth direct current.And the direct current behind over commutation obtains the target frequency value through inverter, outputs in the motor then and goes.
The interchange end of exporting at inverter also is connected with current sensor, and current sensor carries out the corresponding input interface that current sample is input to dsp processor to the interchange end of inverter output, realizes closed-loop control, and the control to inverter is also realized in real time with accurate.The output of current sensor module also connects fault diagnosis circuit, the output signal of fault diagnosis circuit inserts the corresponding input interface of dsp processor, fault diagnosis circuit can detect the unusual of electric current and notify dsp processor, thereby dsp processor can be taked corresponding countermeasure.Be connected with keyboard at dsp processor through communication interface, the user can be by the frequency of keyboard to set up reactive power and frequency converter.
Claims (5)
1, a kind of low harmonic conversion speed regulator of reactive power compensation, comprise the rectifier that is used for three-phase electricity is converted to direct current, be used for the dc inversion of rectifier output is become the inverter of the required three-phase electricity of load, it is characterized in that: also comprise dsp processor, the current/voltage of electrical network input rectifier inserts dsp processor after the current/voltage sensor assembly detects, data make rectifier carry out reactive power compensation to electrical network through the closure of the IGBT switches set of the corresponding pulse width modulated drive signal of output after the DSP resume module in optocoupler drive circuit module driving rectifier.
2, the low harmonic conversion speed regulator of reactive power compensation according to claim 1, it is characterized in that: the interchange end of described inverter output is connected with current sensor, and current sensor carries out the corresponding input interface that current sample is input to dsp processor to the interchange end of inverter output.
3, the low harmonic conversion speed regulator of reactive power compensation according to claim 2 is characterized in that: the output of described current sensor module connects fault diagnosis circuit, and the output signal of fault diagnosis circuit inserts the corresponding input interface of dsp processor.
4, the low harmonic conversion speed regulator of reactive power compensation according to claim 1 is characterized in that: the dc output end of described rectifier inserts the respective input mouth of dsp processor through capacitance voltage.
5, the low harmonic conversion speed regulator of reactive power compensation according to claim 1, it is characterized in that: described dsp processor is connected with the keyboard that is used to set reactive power and frequency converter frequency through communication interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200597583U CN2907030Y (en) | 2006-05-31 | 2006-05-31 | Low-harmonic variable-frequency speed regulator with reactive power compensation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200597583U CN2907030Y (en) | 2006-05-31 | 2006-05-31 | Low-harmonic variable-frequency speed regulator with reactive power compensation function |
Publications (1)
| Publication Number | Publication Date |
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| CN2907030Y true CN2907030Y (en) | 2007-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2006200597583U Expired - Fee Related CN2907030Y (en) | 2006-05-31 | 2006-05-31 | Low-harmonic variable-frequency speed regulator with reactive power compensation function |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976954A (en) * | 2010-09-30 | 2011-02-16 | 中国矿业大学 | Frequency converter and method for eliminating harmonic and compensating reactive power |
| CN102386622A (en) * | 2011-11-03 | 2012-03-21 | 东南大学 | Fully active harmonic control device combining full compensation and fractionated compensation of a plurality of machines |
| CN102510229A (en) * | 2011-11-08 | 2012-06-20 | 威海广泰空港电源设备有限公司 | Modularized power supply with electric energy quality level-to-level management function |
| CN102832833A (en) * | 2012-09-24 | 2012-12-19 | 核工业理化工程研究院 | Alternating current to direct current conversion device of intermediate frequency converter |
| US8542502B2 (en) | 2008-10-31 | 2013-09-24 | Mitsubishi Electric Corporation | Electrical power conversion apparatus |
| CN103560681A (en) * | 2013-11-11 | 2014-02-05 | 上海电气自动化设计研究所有限公司 | Four-quadrant frequency converter control device for AC drive system |
| CN107888082A (en) * | 2017-12-15 | 2018-04-06 | 天水电气传动研究所有限责任公司 | A kind of converter with Harmonics elimination and no-power compensation function |
-
2006
- 2006-05-31 CN CNU2006200597583U patent/CN2907030Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8542502B2 (en) | 2008-10-31 | 2013-09-24 | Mitsubishi Electric Corporation | Electrical power conversion apparatus |
| CN102197580B (en) * | 2008-10-31 | 2013-11-20 | 三菱电机株式会社 | Power conversion device |
| CN101976954A (en) * | 2010-09-30 | 2011-02-16 | 中国矿业大学 | Frequency converter and method for eliminating harmonic and compensating reactive power |
| CN102386622A (en) * | 2011-11-03 | 2012-03-21 | 东南大学 | Fully active harmonic control device combining full compensation and fractionated compensation of a plurality of machines |
| CN102510229A (en) * | 2011-11-08 | 2012-06-20 | 威海广泰空港电源设备有限公司 | Modularized power supply with electric energy quality level-to-level management function |
| CN102832833A (en) * | 2012-09-24 | 2012-12-19 | 核工业理化工程研究院 | Alternating current to direct current conversion device of intermediate frequency converter |
| CN102832833B (en) * | 2012-09-24 | 2015-07-15 | 核工业理化工程研究院 | Alternating current to direct current conversion device of intermediate frequency converter |
| CN103560681A (en) * | 2013-11-11 | 2014-02-05 | 上海电气自动化设计研究所有限公司 | Four-quadrant frequency converter control device for AC drive system |
| CN107888082A (en) * | 2017-12-15 | 2018-04-06 | 天水电气传动研究所有限责任公司 | A kind of converter with Harmonics elimination and no-power compensation function |
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| Date | Code | Title | Description |
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| 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 |