CN104167737A - Charge and discharge protection circuits of APF/SVG direct current capacitor and method - Google Patents
Charge and discharge protection circuits of APF/SVG direct current capacitor and method Download PDFInfo
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- CN104167737A CN104167737A CN201410229642.9A CN201410229642A CN104167737A CN 104167737 A CN104167737 A CN 104167737A CN 201410229642 A CN201410229642 A CN 201410229642A CN 104167737 A CN104167737 A CN 104167737A
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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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
- Y02E40/20—Active power filtering [APF]
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Abstract
The invention relates to the technical field of APF/SVG, specifically to charge and dischargeprotection circuits of an APF/SVG direct current capacitor and a method. The charge and discharge protection circuits include a main controller and a three-phase six-bridge arm topological structure in the APF/SVG, each phase in the three-phase six-bridge arm topological structure includes two IGBTs connected in series, the two IGBTs connected in series are then connected to a direct current capacitor loop in parallel, output ends of the two IGBTs connected in series are connected to an output reactor, and the a charge protection circuit and a discharge protection circuit are also included, when the APF/SVG starts running, protection is provided for the direct current capacitor through the charge protection circuit, the direct current capacitor is prevented from being damaged due to the circumstance that voltage at two ends exceeds a limiting value, thereby ensuring normal operation of the APF/SVG, and when the APF/SVG stops running, discharge treatment is performed on the direct current capacitor through the discharge protection circuit, thereby ensuring personal safety of maintenance personnel or other operating personnel.
Description
Technical field
The present invention relates to APF/SVG technical field, is specifically a kind of charge-discharge protection circuit and method of APF/SVG DC capacitor.
Background technology
APF (Active Power Filter, active power filter) and SVG (Static Var Generator, static reacance generator) be two kinds of conventional power quality controlling devices, APF/SVG has master controller and three-phase six bridge arm topological structures, as shown in Figure 1, often in three-phase six bridge arm topological structures comprise mutually two IGBT, every two IGBT series connection, two IGBT after series connection are parallel to DC capacitor loop again, and the output of two IGBT after series connection is all connected to an output reactance, the master controller (not shown) that is connected with each IGBT, for controlling the operation of IGBT.Number of patent application is 201310507705.8; name is called the patent application of electronic type APF and SVG soft starting device; a kind of soft starting device is disclosed; provide protection to APF/SVG; but the charge and discharge process of DC capacitor is not protected; in the time that APF/SVG starts operation; the voltage at DC capacitor two ends can exceed its limit value; thereby DC capacitor is damaged; and then affect the normal operation of APF/SVG; and in the time that APF/SVG is out of service, DC capacitor is not carried out to discharge process, thereby threatening maintainer or other operating personnel's personal safety.
Summary of the invention
For the defect existing in prior art; the object of the present invention is to provide a kind of charge-discharge protection circuit and method of APF/SVG DC capacitor; in the time that APF/SVG starts operation; provide protection to DC capacitor; prevent that DC capacitor from damaging because the voltage at its two ends exceedes its limit value, thereby ensure that APF/SVG normally moves, in the time that APF/SVG is out of service; DC capacitor is carried out to discharge process, thereby ensure maintainer or other operating personnel's personal safety.
For reaching above object, the technical scheme that the present invention takes is: a kind of charge-discharge protection circuit of APF/SVG DC capacitor, comprise master controller and three-phase six bridge arm topological structures in APF/SVG, every IGBT that comprises mutually two series connection in three-phase six bridge arm topological structures, two IGBT after series connection are parallel to DC capacitor loop again, and the output of two IGBT after series connection is all connected to an output reactance, also comprise charge protector and discharge protection circuit, described charge protector comprises contactor, described contactor is all connected with the output reactance in three-phase, three-phase in three-phase six bridge arm topological structures or arbitrarily two-phase are all connected with a current-limiting resistance and a charge relay, described current-limiting resistance and charge relay series connection, in parallel with contactor again after series connection, described discharge protection circuit comprises a discharge resistance and an electric discharge relay, and described discharge resistance and electric discharge relay are connected, and are parallel to the two ends of DC capacitor after series connection again, described contactor, charge relay, electric discharge relay are all connected with described master controller.
On the basis of technique scheme, in the time that APF/SVG starts operation, main controller controls contactor and electric discharge relay all disconnect, and make described charge relay all closed, DC capacitor starts slow charging, master controller gathers the voltage at DC capacitor two ends and judges, in the time that the magnitude of voltage at DC capacitor two ends and the difference of working value are 20V～270V, master controller makes contactor closure, and closed charge relay is disconnected, DC capacitor starts quick charge, until the voltage at DC capacitor two ends reaches working value, master controller drives IGBT to enter normal mode of operation,
In the time that APF/SVG is out of service, first master controller makes IGBT cut out, then disconnects contactor, and cuts off the connection of APF/SVG and electrical network, allows electric discharge relay closes, DC capacitor start electric discharge.
On the basis of technique scheme, described working value is set in advance as 600V～800V, and in the time that the magnitude of voltage at DC capacitor two ends reaches 530V～580V, master controller makes contactor closure.
Beneficial effect of the present invention is: in the protective circuit of a kind of APF/SVG DC capacitor of the present invention, have charge protector and discharge protection circuit, in the time that APF/SVG starts operation, pass through charge protector, DC capacitor is slowly charged, in the time that the magnitude of voltage at DC capacitor two ends and the difference of working value are 20V～270V, DC capacitor starts quick charge, until the voltage at DC capacitor two ends reaches working value, thereby avoid DC capacitor to damage because the voltage at its two ends exceedes its limit value, and then ensured that APF/SVG normally moves; In the time that APF/SVG is out of service, by discharge protection circuit, DC capacitor is discharged, thus guarantee maintainer or other operating personnel's personal safety.
Brief description of the drawings
Fig. 1 is APF/SVG three-phase six bridge arm topological structure charts in background technology;
Fig. 2 is the structure chart of the charge-discharge protection circuit of a kind of APF/SVG DC capacitor of the present invention;
Fig. 3 is the structure chart of the charge-discharge protection circuit of the another kind of APF/SVG DC capacitor of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
The charge-discharge protection circuit of a kind of APF/SVG DC capacitor of the present invention; comprise master controller and three-phase six bridge arm topological structures in APF/SVG; every IGBT that comprises mutually two series connection in three-phase six bridge arm topological structures; two IGBT after series connection are parallel to DC capacitor loop again, and the output of two IGBT after series connection is all connected to an output reactance.Also comprise charge protector and discharge protection circuit; described charge protector comprises contactor; described contactor is all connected with the output reactance of three-phase in three-phase six bridge arm topological structures; in three-phase six bridge arm topological structures, three-phase or any two-phase all also connect a current-limiting resistance and a charge relay; current-limiting resistance and charge relay series connection, in parallel with contactor again after series connection.Described discharge protection circuit comprises a discharge resistance and an electric discharge relay; discharge resistance and the series connection of electric discharge relay; after series connection, be parallel to again the two ends of DC capacitor; wherein; described charge relay, electric discharge relay, contactor are also all connected (not shown) with master controller, and are all subject to the control of master controller.
As shown in Figure 2, be a kind of embodiment of the present invention, in three-phase six bridge arm topological structures, each is all connected with a current-limiting resistance and a charge relay mutually.Wherein, contactor QC is all connected with the output reactance of three-phase in three-phase six bridge arm topological structures.R1, R2, R3 are current-limiting resistance; KA1, KA2, KA3 are charge relay; current-limiting resistance R1 connects with charge relay KA1, current-limiting resistance R2 connects with charge relay KA2, current-limiting resistance R3 connects with charge relay KA3; and all in parallel with contactor QC after series connection; and be connected in parallel to respectively each mutually in, form charge protector.Discharge resistance R4 connects with electric discharge relay K A4, is parallel to the two ends of DC capacitor C after series connection again.And charge relay KA1, charge relay KA2, charge relay KA3, electric discharge relay K A4, contactor QC are all connected (not shown) with master controller, and are all subject to the control of master controller.
In the present embodiment, the charge and discharge protecting method of APF/SVG DC capacitor specifically comprises:
In the time that APF/SVG starts operation, main controller controls contactor QC and electric discharge relay K A4 all disconnect, and make described charge relay (KA1, KA2, KA3) all closed, DC capacitor C starts slow charging, master controller gathers the voltage at DC capacitor C two ends and judges, in the time that the magnitude of voltage at DC capacitor C two ends and the difference of working value are 20V～270V, master controller makes contactor QC closure, and make closed charge relay (KA1, KA2, KA3) disconnect, DC capacitor C starts quick charge, until the voltage at DC capacitor C two ends reaches working value, master controller drives IGBT to enter normal mode of operation.
In the present embodiment, the voltage power supply value at described DC capacitor two ends is set in advance as 600V～800V, and in the time that the magnitude of voltage at DC capacitor two ends reaches 530V～580, master controller makes contactor closure.
In the time that APF/SVG is out of service, first master controller makes IGBT cut out, then disconnects contactor QC, and cuts off the connection of APF/SVG and electrical network, allows electric discharge relay K A4 closure, and DC capacitor C starts electric discharge.
As shown in Figure 3; for another kind of embodiment of the present invention; itself and a upper embodiment difference are: in three-phase six bridge arm topological structures, two-phase is all connected with a current-limiting resistance and a charge relay; wherein R1, R2 are current-limiting resistance; KA1, KA2 are charge relay, and current-limiting resistance R1 connects with charge relay KA1, current-limiting resistance R2 connects with charge relay KA2, and all in parallel with contactor QC after series connection; and be connected in parallel to respectively each mutually in, form charge protector.And charge relay KA1, charge relay KA2, electric discharge relay K A4, contactor QC are all connected (not shown) with master controller, and are all subject to the control of master controller.
In the present embodiment, the charge and discharge protecting method of APF/SVG DC capacitor is identical with a upper embodiment, repeats no more.
In the present invention; can adopt auxiliary relay to replace the control of master controller to charge relay, electric discharge relay; allow and form interlocking between charge relay and electric discharge relay; when charge relay is closed; electric discharge relay disconnects; or electric discharge relay closes, and charge relay disconnects, and realizes equally the charge and discharge protecting to DC capacitor.
The present invention is not limited to above-mentioned execution mode, for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, within these improvements and modifications are also considered as protection scope of the present invention.The content not being described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (3)
1. the charge-discharge protection circuit of an APF/SVG DC capacitor, comprise master controller and three-phase six bridge arm topological structures in APF/SVG, every IGBT that comprises mutually two series connection in three-phase six bridge arm topological structures, two IGBT after series connection are parallel to DC capacitor loop again, and the output of two IGBT after series connection is all connected to an output reactance, it is characterized in that: also comprise charge protector and discharge protection circuit, described charge protector comprises contactor, described contactor is all connected with the output reactance in three-phase, three-phase in three-phase six bridge arm topological structures or arbitrarily two-phase are all connected with a current-limiting resistance and a charge relay, described current-limiting resistance and charge relay series connection, in parallel with contactor again after series connection, described discharge protection circuit comprises a discharge resistance and an electric discharge relay, and described discharge resistance and electric discharge relay are connected, and are parallel to the two ends of DC capacitor after series connection again, described contactor, charge relay, electric discharge relay are all connected with described master controller.
2. it,, in a method for the charge-discharge protection circuit of APF/SVG DC capacitor claimed in claim 1, is characterized in that:
In the time that APF/SVG starts operation, main controller controls contactor and electric discharge relay all disconnect, and make described charge relay all closed, DC capacitor starts slow charging, master controller gathers the voltage at DC capacitor two ends and judges, in the time that the magnitude of voltage at DC capacitor two ends and the difference of working value are 20V～270V, master controller makes contactor closure, and closed charge relay is disconnected, DC capacitor starts quick charge, until the voltage at DC capacitor two ends reaches working value, master controller drives IGBT to enter normal mode of operation;
In the time that APF/SVG is out of service, first master controller makes IGBT cut out, then disconnects contactor, and cuts off the connection of APF/SVG and electrical network, allows electric discharge relay closes, DC capacitor start electric discharge.
3. the method for the charge-discharge protection circuit of APF/SVG DC capacitor as claimed in claim 2; it is characterized in that: described working value is set in advance as 600V～800V; in the time that the magnitude of voltage at DC capacitor two ends reaches 530V～580V, master controller makes contactor closure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410229642.9A CN104167737B (en) | 2014-05-28 | 2014-05-28 | A kind of charge-discharge protection circuit and method of APF/SVG DC capacitors |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410229642.9A CN104167737B (en) | 2014-05-28 | 2014-05-28 | A kind of charge-discharge protection circuit and method of APF/SVG DC capacitors |
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| CN104167737A true CN104167737A (en) | 2014-11-26 |
| CN104167737B CN104167737B (en) | 2017-12-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917195A (en) * | 2015-07-01 | 2015-09-16 | 国网智能电网研究院 | Static synchronous series compensation device and control method thereof |
| CN105743359A (en) * | 2014-12-12 | 2016-07-06 | 中车大连电力牵引研发中心有限公司 | Current transformer switch and current transformer |
| CN106877332A (en) * | 2017-03-07 | 2017-06-20 | 合肥赛沃能源科技有限公司 | A kind of active filter and its method of work for shutting down automatic discharging |
| WO2020082860A1 (en) * | 2018-10-24 | 2020-04-30 | 珠海格力电器股份有限公司 | Photovoltaic electricity utilization device and charging control method, apparatus and circuit therefor, and storage medium |
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| CN101051751A (en) * | 2007-05-14 | 2007-10-10 | 上海艾帕电力电子有限公司 | Active power filter including power unit and its control method |
| CN201417950Y (en) * | 2009-05-22 | 2010-03-03 | 山东鲁电电气集团有限公司 | Active filtering device |
| CN101888110A (en) * | 2010-01-21 | 2010-11-17 | 彭绍岛 | High-power portable intelligent recharge and discharge machine |
| CN201839012U (en) * | 2010-11-10 | 2011-05-18 | 中冶华天工程技术有限公司 | Startup charging and shutdown discharging circuit of static var generator |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101051751A (en) * | 2007-05-14 | 2007-10-10 | 上海艾帕电力电子有限公司 | Active power filter including power unit and its control method |
| CN201417950Y (en) * | 2009-05-22 | 2010-03-03 | 山东鲁电电气集团有限公司 | Active filtering device |
| CN101888110A (en) * | 2010-01-21 | 2010-11-17 | 彭绍岛 | High-power portable intelligent recharge and discharge machine |
| CN201839012U (en) * | 2010-11-10 | 2011-05-18 | 中冶华天工程技术有限公司 | Startup charging and shutdown discharging circuit of static var generator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743359A (en) * | 2014-12-12 | 2016-07-06 | 中车大连电力牵引研发中心有限公司 | Current transformer switch and current transformer |
| CN104917195A (en) * | 2015-07-01 | 2015-09-16 | 国网智能电网研究院 | Static synchronous series compensation device and control method thereof |
| CN104917195B (en) * | 2015-07-01 | 2018-10-26 | 全球能源互联网研究院 | A kind of Static Synchronous Series compensation device and its control method |
| CN106877332A (en) * | 2017-03-07 | 2017-06-20 | 合肥赛沃能源科技有限公司 | A kind of active filter and its method of work for shutting down automatic discharging |
| WO2020082860A1 (en) * | 2018-10-24 | 2020-04-30 | 珠海格力电器股份有限公司 | Photovoltaic electricity utilization device and charging control method, apparatus and circuit therefor, and storage medium |
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| Publication number | Publication date |
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| CN104167737B (en) | 2017-12-19 |
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Effective date of registration: 20180322 Address after: 102199 Beijing city Daxing District economic and Technological Development Zone, Yuncheng street, No. 2, No. 1 B-702 Patentee after: Beijing Zhi Zhong energy science and Technology Development Co., Ltd. Address before: 100191 Beijing city Haidian District Qinghe small Camp Road No. 15 Co-patentee before: Dong Weijie Patentee before: Bai Xiaomin Co-patentee before: Li Wei |