CN101282043A - Novel electric power filter - Google Patents
Novel electric power filter Download PDFInfo
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- CN101282043A CN101282043A CNA2008100157500A CN200810015750A CN101282043A CN 101282043 A CN101282043 A CN 101282043A CN A2008100157500 A CNA2008100157500 A CN A2008100157500A CN 200810015750 A CN200810015750 A CN 200810015750A CN 101282043 A CN101282043 A CN 101282043A
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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 discloses a novel electric power filter, belonging to electric power equipment field, which comprises a DSP I, a DSP II is electrically connected with an A/D converter and an IGBT full bridge PWM variable current circuit, the A/D converter is electrically connected with a sensor, the IGBT full bridge PWM variable current circuit is electrically connected with a bus circuit, the DSP I also is electrically connected with a CPLD which is electrically connected with the DSP II which is electrically connected with a man-machine interface circuit and a communication interface circuit. The invention can realize functions of fast and accurate harmonic analysis of non-aberrance or aberrance electric network and reactive power compensation.
Description
Technical field
The present invention relates to a kind of real-time online harmonic content that is used for power supply system and analyze, also realize dynamically suppressing the power electronics harmonic treating apparatus of harmonic content, compensating power.
Background technology
At present, the Active Power Filter-APF that industry spot is used by singlechip chip or low speed digital signal process chip as data processing and control core, by collection and processing to the electrical network three-phase signal, the control convertor circuit produces the corresponding signal of telecommunication and feeds back to electrical network, thereby reaches the purpose that suppresses harmonic wave, compensating power.But this electric-power filter in the three-phase voltage of electrical network certain mutually or after the heterogeneous generation distortion, can cause the asymmetric of three-phase voltage, use to finish behind this traditional active filter harmonic content and reactive power are analyzed accurately and rapidly, calculated, thereby cause convertor circuit to produce the compensating signal of harmonic wave and reactive power mistakenly, make the pollution aggravation of electrical network.
Summary of the invention
For overcome existing Active Power Filter-APF can not finish to the distortion three phase mains carry out accurately and apace analyzing and the inhibition problem, the invention provides a kind of novel electric power filter, it can realize carrying out harmonic analysis accurately and rapidly and inhibition and reactive power compensation function to not producing distortion or producing the electrical network that distorts.
Its technical scheme is:
A kind of novel electric power filter, comprise digital signal processor DSP I, digital signal processor DSP I is electrically connected with A/D converter and IGBT full bridge PWM convertor circuit, A/D converter is connected with sensor electrical, IGBT full bridge PWM convertor circuit is connected with bus circuit, digital signal processor DSP I also is electrically connected with programmable logic device (CPLD), programmable logic device (CPLD) is electrically connected with digital signal processor DSP II, and digital signal processor DSP II is electrically connected with man-machine interface circuit and communication interface circuit.
Be provided with the Controlled CPU chip of harmonic wave control and reactive power compensation in the above-mentioned digital signal processor DSP I, be provided with the control circuit that harmonic content analysis and LCD show in the digital signal processor DSP II.
Above-mentioned digital signal processor DSP I is electrically connected with A/D converter I and A/D converter II, A/D converter I is electrically connected with the current sensor of temperature sensor and grid side, respectively is provided with a signal conditioning circuit between A/D converter I and temperature sensor and the current sensor; A/D converter II is electrically connected with the current sensor and the voltage sensor of load-side, respectively is provided with a signal conditioning circuit between A/D converter II and current sensor and the voltage sensor.
Be disposed with photoelectric isolating circuit and Drive Protecting Circuit between above-mentioned digital signal processor DSP I and the IGBT full bridge PWM convertor circuit.
Above-mentioned IGBT full bridge PWM convertor circuit is electrically connected with bus circuit by isolating reactor.
Above-mentioned man-machine interface circuit comprises LCD display circuit and touch screen control circuit, and touch-screen adopts four-wire resistance type touch screen.
Above-mentioned communication interface circuit comprises RS485 communication interface, ethernet interface and USB interface.
Above-mentioned signal conditioning circuit comprises amplifying unit, filter unit and phase locked-loop unit.
Above-mentioned current sensor and voltage sensor adopt Hall element.
The invention has the beneficial effects as follows: when this filter is used for power supply system, but real-time online is analyzed harmonic content, and realize dynamically suppressing harmonic content, compensating power, the electric network pollution that can harmonic carcellation causes improves the electric power system quality.
Description of drawings
Accompanying drawing 1 is a schematic block circuit diagram of the present invention;
Accompanying drawing 2 is the theory diagram of signal conditioning circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing 1,2 couples of the present invention are described in further detail: as shown in Figure 1, a kind of novel electric power filter, comprise digital signal processor DSP I, be provided with the Controlled CPU chip of harmonic wave control and reactive power compensation in the digital signal processor DSP I, digital signal processor DSP I and A/D converter I, A/D converter II and IGBT full bridge PWM convertor circuit are electrically connected, digital signal processor DSP I also is electrically connected with programmable logic device (CPLD), programmable logic device (CPLD) is electrically connected with digital signal processor DSP II, be provided with the control circuit that harmonic content analysis and LCD show in the digital signal processor DSP II, digital signal processor DSP II is electrically connected with man-machine interface circuit and communication interface circuit.A/D converter I is electrically connected with temperature sensor by signal conditioning circuit, is electrically connected with the current sensor of grid side by signal conditioning circuit; A/D converter II is electrically connected with the current sensor of load-side by signal conditioning circuit, is electrically connected with the voltage sensor of load-side by signal conditioning circuit; Be disposed with Drive Protecting Circuit and photoelectric isolating circuit between IGBT full bridge PWM convertor circuit and digital signal processor DSP I, IGBT full bridge PWM convertor circuit is connected with bus circuit by isolating reactor.
Digital signal processor DSP I and DSP II are high speed digital signal processor MPU, as data processing, logic control core, finish collection, the harmonic data analysis of electrical network loop parameter, and output control electrical network loop harmonic content.Wherein digital signal processor DSP I gathers three-phase voltage, the current data in electrical network loop, adopt modified model instantaneous reactive power theory algorithm process data, and the harmonic content and the reactive power in analysis electrical network loop, generation is to the compensating control signal of electrical network, as the control signal of convertor circuit, realize accuracy and rapidity to power network harmonic wave management and reactive power compensation.Digital signal processor DSP II adopts fast fourier algorithm to carry out the analysis of harmonic content, calculates the each harmonic content value, and shows the each harmonic value in real time, controls the transmission of image data simultaneously.
Programmable logic device (CPLD) adopts low-power consumption, high speed logic control chip, as the auxiliary logic control device, synchronous detecting control to three-phase voltage, current signal, realize high speed logic and sequencing control, simultaneously be provided with the FLASH memory in the programmable logic device (CPLD), be used to store and transmit the swap data between digital signal processor DSP I and the DSP II.
Voltage sensor and current sensor employing high accuracy, Hall voltage transducer, current sensor that the linearity is good are realized the conversion to the voltage and current signal.
Signal conditioning circuit is made of amplifying circuit, low-pass filter circuit, phase-locked loop circuit, finishes amplification, Filtering Processing to the voltage or the current signal of sensor acquisition, and synchronized sampling, to the phase-locked and automatic following function of mains frequency.Filter circuit adopts active second order Butterworth LPF.
The A/D change-over circuit adopts high-speed a/d converter, and its picking rate is 8000 times/second.
IGBT full bridge PWM convertor circuit is realized the real-Time Compensation effect to mains by harmonics under digital signal processor DSP I control, reach the purpose of eliminating high order harmonic component.Adopt the high performance circuit structure with each combination of devices together, utilization is ripe, algorithm is realized analysis, the processing of data efficiently, thereby realizes accurate, compensation fast to distorted signal, improves power grid quality.
The man-machine interface circuit is made up of LCD liquid crystal display circuit and touch screen control circuit, and touch-screen adopts four-wire resistance type touch screen, and is easy and simple to handle.Show to adopt 320x240 figure form crystal display, can show each phase electrical quantity of control loop in real time, have the demonstrations such as curve, harmonic wave rod figure of parameter simultaneously.
Photoelectric isolating circuit adopts photoelectrical coupler, realizes the isolation of unsteady flow drive circuit and digital signal processor DSP control signal, the antijamming capability of raising system and job stability, reliability.
Isolate the effect that reactor plays protection IGBT.
Communication interface circuit comprises RS485 communication interface, ethernet interface and USB interface.
Certainly, protection scope of the present invention is not limited to the foregoing description, so long as those of ordinary skill in the art is through creatively improving, and just should be within protection scope of the present invention.
Claims (9)
1, a kind of novel electric power filter, it is characterized in that: comprise digital signal processor DSP I, digital signal processor DSP I is electrically connected with A/D converter and IGBT full bridge PWM convertor circuit, A/D converter is connected with sensor electrical, IGBT full bridge PWM convertor circuit is connected with bus circuit, digital signal processor DSP I also is electrically connected with programmable logic device (CPLD), programmable logic device (CPLD) is electrically connected with digital signal processor DSP II, and digital signal processor DSP II is electrically connected with man-machine interface circuit and communication interface circuit.
2, novel electric power filter according to claim 1, it is characterized in that being provided with in the described digital signal processor DSP I Controlled CPU chip of harmonic wave control and reactive power compensation, be provided with the control circuit that harmonic content analysis and LCD show in the digital signal processor DSP II.
3, novel electric power filter according to claim 1 and 2, it is characterized in that described digital signal processor DSP I is electrically connected with A/D converter I and A/D converter II, A/D converter I is electrically connected with the current sensor of temperature sensor and grid side, respectively is provided with a signal conditioning circuit between A/D converter I and temperature sensor and the current sensor; A/D converter II is electrically connected with the current sensor and the voltage sensor of load-side, respectively is provided with a signal conditioning circuit between A/D converter II and current sensor and the voltage sensor.
4, novel electric power filter according to claim 1 is characterized in that being disposed with photoelectric isolating circuit and Drive Protecting Circuit between described digital signal processor DSP I and the IGBT full bridge PWM convertor circuit.
5,, it is characterized in that described IGBT full bridge PWM convertor circuit is electrically connected with bus circuit by isolating reactor according to claim 1 or 4 described novel electric power filters.
6, novel electric power filter according to claim 1 is characterized in that described man-machine interface circuit comprises LCD display circuit and touch screen control circuit, and touch-screen adopts four-wire resistance type touch screen.
7, novel electric power filter according to claim 1 is characterized in that described communication interface circuit comprises RS485 communication interface, ethernet interface and USB interface.
8, novel electric power filter according to claim 3 is characterized in that described signal conditioning circuit comprises amplifying unit, filter unit and phase locked-loop unit.
9, novel electric power filter according to claim 3 is characterized in that described current sensor and voltage sensor adopt Hall element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100157500A CN101282043A (en) | 2008-04-30 | 2008-04-30 | Novel electric power filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100157500A CN101282043A (en) | 2008-04-30 | 2008-04-30 | Novel electric power filter |
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| CN101282043A true CN101282043A (en) | 2008-10-08 |
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| CNA2008100157500A Pending CN101282043A (en) | 2008-04-30 | 2008-04-30 | Novel electric power filter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331528A (en) * | 2011-07-12 | 2012-01-25 | 江苏镇安电力设备有限公司 | Neural network inverse-based soft sensing method for compensation capacity and medium loss of capacitor and on-line monitoring |
| CN102496936A (en) * | 2011-12-20 | 2012-06-13 | 安徽鑫龙电器股份有限公司 | Active power filtering system for frequency converter |
| CN103454519A (en) * | 2013-07-31 | 2013-12-18 | 广东电网公司电力科学研究院 | System and method for calculation/liquid crystal display of electrical parameters of active power filter |
| CN107145096A (en) * | 2017-03-24 | 2017-09-08 | 江苏舒茨测控设备股份有限公司 | Dual processor sensor signal processing module |
| CN108233393A (en) * | 2018-02-02 | 2018-06-29 | 浙江维格泰电气科技有限公司 | T-shaped three level static of one kind is idle generating system and method |
-
2008
- 2008-04-30 CN CNA2008100157500A patent/CN101282043A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331528A (en) * | 2011-07-12 | 2012-01-25 | 江苏镇安电力设备有限公司 | Neural network inverse-based soft sensing method for compensation capacity and medium loss of capacitor and on-line monitoring |
| CN102496936A (en) * | 2011-12-20 | 2012-06-13 | 安徽鑫龙电器股份有限公司 | Active power filtering system for frequency converter |
| CN103454519A (en) * | 2013-07-31 | 2013-12-18 | 广东电网公司电力科学研究院 | System and method for calculation/liquid crystal display of electrical parameters of active power filter |
| CN103454519B (en) * | 2013-07-31 | 2015-08-05 | 广东电网公司电力科学研究院 | The system and method for Active Power Filter-APF electrical quantity calculating/liquid crystal display |
| CN107145096A (en) * | 2017-03-24 | 2017-09-08 | 江苏舒茨测控设备股份有限公司 | Dual processor sensor signal processing module |
| CN108233393A (en) * | 2018-02-02 | 2018-06-29 | 浙江维格泰电气科技有限公司 | T-shaped three level static of one kind is idle generating system and method |
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Open date: 20081008 |