CN104253440B - Based on the reactive power compensator with switching tube and the control method of CAN - Google Patents
Based on the reactive power compensator with switching tube and the control method of CAN Download PDFInfo
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- CN104253440B CN104253440B CN201410304094.1A CN201410304094A CN104253440B CN 104253440 B CN104253440 B CN 104253440B CN 201410304094 A CN201410304094 A CN 201410304094A CN 104253440 B CN104253440 B CN 104253440B
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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
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
Abstract
A kind of reactive power compensator with switching tube based on CAN and control method thereof, comprise more than one electric control box, each electric control box includes ac bus, described ac bus is electrically connected with reactive load through after the first current transformer of electric control box outside and the second current transformer successively, described ac bus is also electrically connected with of inlet wire contactor of this electric control box inside, the conductor of the other end of inlet wire contactor is electrically connected through the input with the grid-connected filter of this electric control box inside after the 3rd current transformer of this electric control box inside, the output of grid-connected filter is electrically connected with the IGBT switching tube group of this electric control box inside, and can effectively avoid current signal of the prior art generation decay to cause sampled signal inaccurate in conjunction with its control method, compensation effect is poor and cannot reach the defect of national grid to the requirement of power factor.
Description
Technical field
The invention belongs to reactive power compensation technology field, be specifically related to a kind of reactive power compensator with switching tube based on CAN and control method thereof.
Background technology
What require the quality of power supply along with national grid improves constantly, and national grid is progressively strengthening the punishment for the non-compliant enterprise of power factor.Therefore conventional reactive power compensator adopts CT series connection, PT parallel way, the reactive power of computational load in each compensation arrangement, after multiple CT series connection, current signal produces decay, causes sampled signal inaccurate, compensation effect is poor, cannot reach the requirement of national grid to power factor.
Summary of the invention
Object of the present invention provides a kind of reactive power compensator with switching tube based on CAN and control method thereof, comprise more than one electric control box, each electric control box includes ac bus, described ac bus is electrically connected with reactive load through after the first current transformer of electric control box outside and the second current transformer successively, described ac bus is also electrically connected with of inlet wire contactor of this electric control box inside, the conductor of the other end of inlet wire contactor is electrically connected through the input with the grid-connected filter of this electric control box inside after the 3rd current transformer of this electric control box inside, the output of grid-connected filter is electrically connected with the IGBT switching tube group of this electric control box inside, the Men Duantong of the IGBT switching tube in IGBT switching tube group be arranged on this electric control box inside with PWM mouth, digital signal pin is connected with the PWM mouth of the DSP control chip of analog signal pin, inlet wire contactor is connected with the digital signal pin of DSP control chip, with the IGBT switching tube in IGBT switching tube group be in parallel for electric capacity, electric capacity is provided with voltage sensor, voltage sensor is connected with DSP control chip, the analog signal pin of DSP control chip is connected with the sample circuit of this electric control box inside, the wire that described sample circuit is also connected with ac bus is connected, the position that described sample circuit is connected with ac bus is provided with voltage transformer, described master controller is connected with the second current transformer with the first current transformer, master controller is connected with each electric control box by CAN, described master controller is positioned at outside electric control box, described DSP control chip and master controller are respectively reactive power compensation secondary module and reactive power compensation previous module.And sampled signal is inaccurate, compensation effect is poor and cannot reach the defect of national grid to the requirement of power factor can effectively to avoid current signal of the prior art generation decay to cause in conjunction with its control method.
In order to overcome deficiency of the prior art, the invention provides a kind of based on CAN with the reactive power compensator of switching tube and the solution of control method thereof, specific as follows:
A kind of reactive power compensator with switching tube based on CAN, comprise more than one electric control box 101, each electric control box includes ac bus 1, described ac bus 1 is electrically connected with reactive load 2 through after the first Current Transmit 1 of electric control box 101 outside and the second Current Transmit 2 successively, described ac bus 1 is also electrically connected with of inlet wire contactor 3 of this electric control box 101 inside, the conductor of the other end of inlet wire contactor 3 is electrically connected through the input with the grid-connected filter 4 of this electric control box 101 inside after the 3rd Current Transmit 3 of this electric control box 101 inside, the output of grid-connected filter 4 is electrically connected with the IGBT switching tube group 5 of this electric control box 101 inside, it is inner and with PWM mouth that the Men Duantong of the IGBT switching tube in IGBT switching tube group 5 is arranged on this electric control box 101, digital signal pin is connected with the PWM mouth of the DSP control chip 7 of analog signal pin, inlet wire contactor 3 is connected with the digital signal pin of DSP control chip 7, with the IGBT switching tube in IGBT switching tube group 5 be in parallel for electric capacity 10, electric capacity 10 is provided with voltage sensor PT2, voltage sensor PT2 is connected with DSP control chip 7, the analog signal pin of DSP control chip 7 is connected with the sample circuit 6 of this electric control box 101 inside, the wire of described sample circuit 6 also through being connected with ac bus 1 is connected, described sample circuit 6 is provided with voltage transformer pt 1 with the position that ac bus 1 is connected, master controller is connected with each electric control box by CAN, master controller is connected with each electric control box by CAN, described master controller 8 is positioned at outside electric control box 101, described DSP control chip 7 and master controller 8 are respectively reactive power compensation secondary module and reactive power compensation previous module.
The supply power voltage of described ac bus 1 is 380V.
Described DSP control chip 7 is also connected with host computer 9.
The control method of the described reactive power compensator with switching tube based on CAN, step is as follows:
Step 1: first start the reactive power compensator with switching tube based on CAN, the digital signal pin of DSP control chip 7 sends signal and is closed by inlet wire contactor 3, gather the electrical network output current signal of ac bus 1, the load current signal of ac bus 1 and compensating current signal respectively additionally by the first Current Transmit 1, second Current Transmit 2 and the 3rd Current Transmit 3, voltage sensor PT2 and voltage transformer pt 1 gather the voltage signal of electric capacity 10 and the voltage signal of ac bus 1 respectively simultaneously;
Step 2: the electrical network output current signal of ac bus 1 that collection comes and the load current signal of ac bus 1 are sent in master controller 8 in real time, and gathering the compensating current signal, the voltage signal of electric capacity 10 and the voltage signal of ac bus 1 that come by the sample circuit 6 that is delivered in real time in each self-corresponding electric control box 101, sample circuit 6 is sent into gather the compensating current signal, the voltage signal of electric capacity 10 and the voltage signal of ac bus 1 that come in DSP control chip 7;
Step 3: described master controller 8 and DSP control chip 7 carry out according to the voltage signal of the ac bus 1 received the voltage-phase that phase-locked process obtains ac bus 1, the master controller 8 simultaneously derives reactive current value according to the electrical network output current signal of the ac bus 1 received and the load current signal of ac bus 1 in conjunction with ip-iq Detecting Reactive Current algorithm;
Step 4: then idle supplementary previous module is sent to reactive current value reactive current value in the DSP control chip 7 in each electric control box 101 by CAN, described DSP control chip 7 is according to the on off state of the IGBT switching tube in the size control IGBT switching tube group 5 of the reactive current value received, utilize the grid-connected filter 4 of voltage driven formed in electric capacity 10 to form the electric current that can balance out reactive current value, realize the reactive power compensation to bus current with this.
By these technical characteristics, the position that voltage transformer pt 1 of the present invention is arranged can reduce the voltage attenuation from other local Sample AC buses, and CAN only needs extraction two lines just can by the node in all electric control boxes 101 to coupling together, such combine its control method can to prevent the decay of communications and structure simple, realize easily.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention.
Embodiment
As shown in Figure 1, a kind of reactive power compensator with switching tube based on CAN, comprise more than one electric control box 101, each electric control box includes ac bus 1, described ac bus 1 is electrically connected with reactive load 2 through after the first Current Transmit 1 of electric control box 101 outside and the second Current Transmit 2 successively, described ac bus 1 is also electrically connected with of inlet wire contactor 3 of this electric control box 101 inside, the conductor of the other end of inlet wire contactor 3 is electrically connected through the input with the grid-connected filter 4 of this electric control box 101 inside after the 3rd Current Transmit 3 of this electric control box 101 inside, the output of grid-connected filter 4 is electrically connected with the IGBT switching tube group 5 of this electric control box 101 inside, it is inner and with PWM mouth that the Men Duantong of the IGBT switching tube in IGBT switching tube group 5 is arranged on this electric control box 101, digital signal pin is connected with the PWM mouth of the DSP control chip 7 of analog signal pin, inlet wire contactor 3 is connected with the digital signal pin of DSP control chip 7, with the IGBT switching tube in IGBT switching tube group 5 be in parallel for electric capacity 10, electric capacity 10 is provided with voltage sensor PT2, voltage sensor PT2 is connected with DSP control chip 7, the analog signal pin of DSP control chip 7 is connected with the sample circuit 6 of this electric control box 101 inside, the wire of described sample circuit 6 also through being connected with ac bus 1 is connected, described sample circuit 6 is provided with voltage transformer pt 1 with the position that ac bus 1 is connected, the position that voltage transformer pt 1 is arranged can reduce the voltage attenuation from other local Sample AC buses, described master controller is connected with the second current transformer with the first current transformer, master controller is connected with each electric control box by CAN, CAN only needs extraction two lines just can by the node in all electric control boxes 101 to coupling together, can prevent like this decay of communications and structure simple, described master controller 8 is positioned at outside electric control box 101, reactive power compensation secondary module and reactive power compensation previous module is respectively arranged with in described DSP control chip 7 and master controller 8.The supply power voltage of described ac bus 1 is 380V.Described DSP control chip 7 is also connected with host computer 9.
The control method of the described reactive power compensator with switching tube based on CAN, step is as follows:
Step 1: first start the reactive power compensator with switching tube based on CAN, the digital signal pin of DSP control chip 7 sends signal and is closed by inlet wire contactor 3, gather the electrical network output current signal of ac bus 1, the load current signal of ac bus 1 and compensating current signal respectively additionally by the first Current Transmit 1, second Current Transmit 2 and the 3rd Current Transmit 3, voltage sensor PT2 and voltage transformer pt 1 gather the voltage signal of electric capacity 10 and the voltage signal of ac bus 1 respectively simultaneously;
Step 2: the electrical network output current signal of ac bus 1 that collection comes and the load current signal of ac bus 1 are sent in master controller 8 in real time, and gathering the compensating current signal, the voltage signal of electric capacity 10 and the voltage signal of ac bus 1 that come by the sample circuit 6 that is delivered in real time in each self-corresponding electric control box 101, sample circuit 6 is sent into gather the compensating current signal, the voltage signal of electric capacity 10 and the voltage signal of ac bus 1 that come in DSP control chip 7;
Step 3: carry out according to the voltage signal of the ac bus 1 received the voltage-phase that phase-locked process obtains ac bus 1 in described master controller 8 and DSP control chip 7, derives reactive current value according to the electrical network output current signal of ac bus 1 received and the load current signal of ac bus 1 in conjunction with ip-iq Detecting Reactive Current algorithm in the master controller 8 simultaneously;
Step 4: then idle supplementary previous module is sent to reactive current value reactive current value in the DSP control chip 7 in each electric control box 101 by CAN, described DSP control chip 7 is according to the on off state of the IGBT switching tube in the size control IGBT switching tube group 5 of the reactive current value received, utilize the grid-connected filter 4 of voltage driven formed in electric capacity 10 to form the electric current that can balance out reactive current value, realize the reactive power compensation to bus current with this.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solution of the present invention content, according to technical spirit of the present invention, within the spirit and principles in the present invention, to any simple amendment that above embodiment is done, equivalent replacement and improvement etc., within the protection range all still belonging to technical solution of the present invention.
Claims (4)
1. the reactive power compensator with switching tube based on CAN, it is characterized in that comprising more than one electric control box, each electric control box includes ac bus, described ac bus is electrically connected with reactive load through after the first current transformer of electric control box outside and the second current transformer successively, described ac bus is also electrically connected with of inlet wire contactor of this electric control box inside, the conductor of the other end of inlet wire contactor is electrically connected through the input with the grid-connected filter of this electric control box inside after the 3rd current transformer of this electric control box inside, the output of grid-connected filter is electrically connected with the IGBT switching tube group of this electric control box inside, it is inner and with PWM mouth that the Men Duantong of the IGBT switching tube in IGBT switching tube group is arranged on this electric control box, digital signal pin is connected with the PWM mouth of the DSP control chip of analog signal pin, inlet wire contactor is connected with the digital signal pin of DSP control chip, with the IGBT switching tube in IGBT switching tube group be in parallel for electric capacity, electric capacity is provided with voltage sensor, voltage sensor is connected with DSP control chip, the analog signal pin of DSP control chip is connected with the sample circuit of this electric control box inside, the wire of described sample circuit also through being connected with ac bus is connected, the position that described sample circuit is connected with ac bus is provided with voltage transformer, described electric control box is also provided with master controller outward, described master controller is with DSP control chip, first current transformer is connected by CAN with the second current transformer, described master controller is positioned at outside electric control box, reactive power compensation secondary module and reactive power compensation previous module is respectively arranged with in described DSP control chip and master controller.
2. the reactive power compensator with switching tube based on CAN according to claim 1, is characterized in that the supply power voltage of described ac bus is 380V.
3. the reactive power compensator with switching tube based on CAN according to claim 1, is characterized in that described DSP control chip is also connected with host computer.
4. the control method of the reactive power compensator with switching tube based on CAN according to claim 1, it is characterized in that, step is as follows:
Step 1: first start the reactive power compensator with switching tube based on CAN, the digital signal pin of DSP control chip sends signal and is closed by inlet wire contactor, gather the electrical network output current signal of ac bus, the load current signal of ac bus and compensating current signal respectively additionally by the first current transformer, the second current transformer and the 3rd current transformer, voltage sensor and voltage transformer gather the voltage signal of electric capacity and the voltage signal of ac bus respectively simultaneously;
Step 2: the electrical network output current signal of ac bus that collection comes and the load current signal of ac bus are sent in master controller in real time, and gathering the compensating current signal, the voltage signal of electric capacity and the voltage signal of ac bus that come by the sample circuit that is delivered in real time in each self-corresponding electric control box, sample circuit is sent into gather the compensating current signal, the voltage signal of electric capacity and the voltage signal of ac bus that come in DSP control chip;
Step 3: described DSP control chip carries out according to the voltage signal of the ac bus received the voltage-phase that phase-locked process obtains ac bus, the master controller simultaneously derives reactive current value according to the electrical network output current signal of the ac bus received and the load current signal of ac bus in conjunction with ip-iq Detecting Reactive Current algorithm;
Step 4: then reactive power compensation previous module to be sent to by CAN reactive current value in the DSP control chip in each electric control box reactive current value, described DSP control chip is according to the on off state of the IGBT switching tube in the size control IGBT switching tube group of the reactive current value received, utilize the grid-connected filter of the voltage driven formed in electric capacity to form the electric current that can balance out reactive current value, realize the reactive power compensation to bus current with this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410304094.1A CN104253440B (en) | 2014-06-30 | 2014-06-30 | Based on the reactive power compensator with switching tube and the control method of CAN |
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| CN201410304094.1A CN104253440B (en) | 2014-06-30 | 2014-06-30 | Based on the reactive power compensator with switching tube and the control method of CAN |
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| CN104253440A CN104253440A (en) | 2014-12-31 |
| CN104253440B true CN104253440B (en) | 2016-04-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8390149B2 (en) * | 2007-12-24 | 2013-03-05 | United Technologies Corporation | Harmonic filter with integrated power factor correction |
| CN201430442Y (en) * | 2009-06-22 | 2010-03-24 | 西安森宝电气工程有限公司 | Active power filter device |
| CN202004458U (en) * | 2011-03-17 | 2011-10-05 | 博耳(无锡)电力成套有限公司 | Active filter circuit with intelligent communication function |
| CN103326366A (en) * | 2013-06-28 | 2013-09-25 | 中国西电电气股份有限公司 | Three-single-phase-three-wire-system parallel APF/SVG device |
| CN103683290B (en) * | 2013-12-17 | 2016-02-24 | 深圳市三和电力科技有限公司 | A kind of parallel connection type active electric filter |
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