CN204349457U - A kind of reactive power compensation filtering device - Google Patents
A kind of reactive power compensation filtering device Download PDFInfo
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- CN204349457U CN204349457U CN201520005373.8U CN201520005373U CN204349457U CN 204349457 U CN204349457 U CN 204349457U CN 201520005373 U CN201520005373 U CN 201520005373U CN 204349457 U CN204349457 U CN 204349457U
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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 utility model discloses a kind of reactive power compensation filtering device, the reactive power compensation filtering device that the utility model provides, be made up of APF or SVG and multiple not homogeneous passive filtering branch road, parallel connection is linked into the reactive power compensation and harmonics restraint of carrying out electrical network in electrical network, wherein, it is active filter branch road that APF compensates branch road, and it is that silent oscillation dynamic reactive generator compensates branch road that SVG compensates branch road, and both is all active compensation branch road.The reactive power compensation filtering device provided due to the utility model contains the active leg of Active Power Filter-APF and the passive leg of not homogeneous passive filtering branch road, so when carrying out reactive power compensation, there is the advantage of passive and active reactive power compensation filtering simultaneously, namely ensure that the power loss simultaneously realizing electrical network is little, the stepless balance adjustment of reactive compensation capacity and active suppression harmonic wave.
Description
Technical field
The utility model relates to field of power, particularly a kind of reactive power compensation filtering device.
Background technology
In electric power system, the harmonic wave control of electric power system and reactive balance are to the safety and economic operation of electrical network and to improve the quality of power supply significant.In electrical network, there is the reactive apparatus of a large amount of load or burden without work and reactive power frequent variations, cause idle problem.The particularly grid-connected and power electronic technology of new forms of energy and the extensive use of device, idle problem is more outstanding; Further; the electric current that the nonlinear-load that extensive application equipment has in the power distribution network of electrical network produces and voltage harmonic; capital has a strong impact on the security of operation of the controller switching equipment in electrical network, adds electricity loss, causes interference to electric network protection and automation control formula equipment.
In order to administer the harmonic wave of electric power system and carry out reactive balance, access reactive power compensator in parallel on electrical network, such as capacitor compensation cabinet satisfies the demands.But, along with the device type in access electrical network gets more and more, and the harmonic current characteristic of electrical network is relevant with the type of equipment, the operational mode of electric power system and load variations, current power system has the advantages that high-frequency harmonic content is high and fundamental wave reactive power requirement is relatively little, so capacitor compensation cabinet parallel connection access electrical network cannot meet reactive power compensation and filtering needs, special reactive power compensation filtering device must be configured to the requirement of the power factor and quality of power supply index of correlation that meet the electric power system of electrical network.
At present, the reactive power compensation filtering method of electric power system mainly contains following three kinds.
First kind of way, suitably forms passive filter by filtering capacitor, reactor and resistor, adopts parallel way to be connected with the harmonic source in electrical network, eliminates the major harmonic once or several times in electrical network;
The second way, the Passive Reactive Power Compensation filter of Static Var Compensator (SVC) type composed in parallel by thyristor-controlled reactor (TCR) and multiple tap capacitance inductance (LC) tuning filtering compensating circuit, the cooperation control of TCR and each branch LC tuning filtering compensating circuit can realize the stepless control of reactive compensation capacity, can play filtering compensation effect effectively to the charging station in electrical network simultaneously;
The third mode, the harmonic wave that the non-linear equipment in electrical network causes is administered in employing active filter (APF).
Can find out, the reactive power compensation filtering method of current electric power system mainly adopts active mode or passive mode to carry out.But, no matter adopt active mode or passive mode, there is shortcoming all respectively.For active mode, can not carry out reactive power compensation in a large number, the electric energy of its power loss electrical network is larger, and capacity is smaller, and cost fault that is high and active reactive power compensation filter also easily causes the fault of electric power system.For passive mode, by electric power system parameter influence, the shortcoming such as filter times is single, volume is large and energy consumption is large, dynamically can not follow the tracks of the harmonic wave of electric power system simultaneously.Specifically, when adopting the above-mentioned second way, the shortcoming of the Passive Reactive Power Compensation filter of the SVC type of setting is that its power device loss is large, parameter is variable and dynamic active suppression humorous involving can to electrical network harmonic in the SVC course of work.
To sum up, the reactive power compensation filtering method of current electric power system, is carrying out in reactive power compensation filtering, cannot ensure to realize to reduce power loss, the electrodeless balance adjustment of reactive compensation capacity and active suppression harmonic wave simultaneously.
Utility model content
In view of this, the utility model embodiment provides a kind of reactive power compensation filtering device, and this device can in reactive power compensation filtering, ensures to realize that power loss is little, the electrodeless balance adjustment of reactive compensation capacity and active suppression harmonic wave simultaneously.
According to above-mentioned purpose, the utility model is achieved in that
A kind of reactive power compensation filtering device, comprising: silent oscillation dynamic reactive generator or active filter compensate branch road (10) and multiple not homogeneous passive filtering branch road (20), wherein,
Silent oscillation dynamic reactive generator or active filter compensate branch road (10), be composed in series by insulated gate bipolar transistor power model (101) and the first reactor (102), be linked in electrical network (30) by star connection parallel connection;
Not homogeneous passive filtering branch road (20), is composed in series by not homogeneous filtering capacitor (201) and the second reactor (202), is linked in electrical network (30) by star connection parallel connection.
Preferably, described first reactor (102) is filtering air core reactor; Second reactor (202) is iron-core reactor.
Preferably, silent oscillation dynamic reactive generator or active filter compensate branch road (10) and also comprise the first low-voltage combination switch (103), be connected between the first reactor (102) and electrical network (30), compensate branch road (10) to electrical network (30) for switching silent oscillation dynamic reactive generator or active filter.
Preferably, silent oscillation dynamic reactive generator or active filter compensate branch road (10) and also comprise the first low-tension fuse (104), are connected between the first reactor (102) and the first low-voltage combination switch (103);
Silent oscillation dynamic reactive generator or active filter compensate branch road (10) also first lightning arrester branch road (105) in parallel between the first low-tension fuse (104) with the first low-voltage combination switch (103).
Preferably, homogeneous passive filtering branch road (20) does not also comprise the second low-voltage combination switch (203), be connected between the second reactor (202) and electrical network (30), for switching not homogeneous passive filtering branch road (20) to electrical network (30).
Preferably, homogeneous passive filtering branch road (20) does not also comprise the second low-tension fuse (204), is connected between the second reactor (202) and the second low-voltage combination switch (203);
Not homogeneous passive filtering branch road (20) also second lightning arrester branch road (205) in parallel between the second low-tension fuse (204) with low-voltage combination switch (203).
Preferably, homogeneous passive filtering branch road (20) does not comprise 5 LC filter branch, 7 LC filter branch and 11 times and one or more combinations with high-pass filtering last time branch road.
As can be seen from the above scheme, the reactive power compensation filtering device that the utility model embodiment provides, be made up of APF or SVG compensation branch road and multiple not homogeneous passive filtering branch road, parallel connection is linked into the reactive power compensation and harmonics restraint of carrying out electrical network in electrical network, wherein, it is that active filter compensates branch road, SVG compensation branch road is that silent oscillation dynamic reactive generator compensates branch road that APF compensates branch road, and both is all active compensation branch road.The reactive power compensation filtering device provided due to the utility model embodiment contains the active leg of Active Power Filter-APF and the passive leg of not homogeneous passive filtering branch road, so when carrying out reactive power compensation, there is the advantage of passive and active reactive power compensation filtering simultaneously, namely ensure that the power loss simultaneously realizing electrical network is little, the electrodeless balance adjustment of reactive compensation capacity and active suppression harmonic wave.
Accompanying drawing explanation
The reactive power compensation filtering device structural representation that Fig. 1 provides for the utility model embodiment;
The reactive power compensation filtering method flow chart that Fig. 2 provides for the utility model embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, the utility model is described in further detail.
When carrying out reactive power compensation filtering to electric power system, namely needing to consider power loss, needing again to consider the electrodeless balance adjustment of reactive compensation capacity and the performance of harmonic inhabitation, reaching the balance between three.And iff the reactive power compensation filtering technique of passive mode in background technology, then make power loss comparatively large, and the electric capacity that passive mode is applied can cause rush of current and voltage oscillation to electrical network instantaneously at switching, but harmonics restraint is relatively good; And iff adopting the reactive power compensation filtering technique of active mode, then maintenance cost and cost of investment larger, and can in electrical network harmonic, cannot harmonic inhabitation very well, but the electrodeless balance adjustment of reactive compensation capacity can be realized.Therefore, the reactive power compensation filtering device that the utility model embodiment provides, be made up of APF or SVG compensation branch road and multiple not homogeneous passive filtering branch road, parallel connection is linked into the reactive power compensation and harmonics restraint of carrying out electrical network in electrical network, wherein, it is that active filter compensates branch road, SVG compensation branch road is that silent oscillation dynamic reactive generator compensates branch road that APF compensates branch road, and both is all active compensation branch road.
The reactive power compensation filtering device provided due to the utility model embodiment contains the active leg of Active Power Filter-APF and the passive leg of not homogeneous passive filtering branch road, so when carrying out reactive power compensation, there is the advantage of passive and active reactive power compensation filtering simultaneously, namely ensure that the power loss simultaneously realizing electrical network is little, the electrodeless balance adjustment of reactive compensation capacity and active suppression harmonic wave.
The reactive power compensation filtering device structural representation that Fig. 1 provides for the utility model embodiment, comprising: APF or SVG compensates branch road 10 and multiple not homogeneous passive filtering branch road 20, wherein,
APF or SVG compensates branch road 10, and the functional unit 101 be made up of insulated gate bipolar transistor (IGBT) power model and the first reactor 102 are composed in series, and are linked in electrical network 30 by star connection parallel connection;
Not homogeneous passive filtering branch road 20, is composed in series by not homogeneous filtering capacitor 201 and the second reactor 202, is linked in electrical network 30 by star connection parallel connection.
In the apparatus, the first reactor 102 is filtering air core reactor.
APF or SVG compensates branch road 10 and also comprises the first low-voltage combination switch 103, is connected between the first reactor 102 and electrical network 30, compensates branch road 10 to electrical network 30 for switching SVG.
APF or SVG compensates branch road 10 and also comprises the first low-tension fuse 104, is connected between the first reactor 102 and the first low-voltage combination switch 103, and for Limited Current, protection APF or SVG compensates branch road 10.
APF or SVG compensates branch road 10 also first lightning arrester branch road 105 in parallel between the first low-tension fuse 104 with the first low-voltage combination switch 103, for the protection of SVG compensation branch road.
In the apparatus, also do not comprise the second low-voltage combination switch 203 in homogeneous passive filtering branch road 20, be connected between the second reactor 202 and electrical network 30, for switching not homogeneous passive filtering branch road 20 to electrical network 30.
Homogeneous passive filtering branch road 20 does not also comprise the second low-tension fuse 204, is connected between the second reactor 202 and the second low-voltage combination switch 203, for Limited Current.
Homogeneous passive filtering branch road 20 is not at the second low-tension fuse 204 and also the second lightning arrester branch road 205 in parallel between low-voltage combination switch 203, for the protection of not homogeneous passive filtering branch road 20.
In the apparatus, the second reactor 202 is iron-core reactor.
Homogeneous passive filtering branch road 20 does not comprise 5 LC filter branch, 7 LC filter branch and 11 times and one or more combinations with high-pass filtering last time branch road, concrete switching any or which plant homogeneous passive filtering branch road 20 and need the corresponding times harmonic suppressed to determine according to electrical network.
In the apparatus, the first low-voltage combination switch 103 and the second low-voltage combination switch 203 are all combined by thyristor valve and high-speed switch, direct switching.
In the apparatus, described parallel connection access electrical network 30 is that on the harmonic source of access electrical network 30 in parallel, this electrical network 30 adopts the voltage bus of 400 volts.
The reactive power compensation filtering method flow chart that Fig. 2 provides for the utility model embodiment, its concrete steps are:
Step 201, be linked in electrical network by being compensated the reactive power compensation filtering device parallel connection that branch road and multiple not homogeneous passive filtering branch road form by APF or SVG;
Step 202, switching APF or SVG compensate branch road, and carry out the switching of corresponding number of times passive filtering branch road according to the harmonic number of electrical network, carry out the reactive power compensation filtering of electrical network.
In the method, APF or SVG compensates the compensation branch road that branch road is passive mode, and it containing electric capacity, can not regulate phase place and the amplitude of the output voltage electric current of electrical network, realize the electrodeless balance adjustment of reactive compensation capacity.
In the method, described not homogeneous passive filtering branch road comprises 5 LC filter branch, 7 LC filter branch and 11 times and one or more combinations with high-pass filtering last time branch road, when electrical network comprise 5 subharmonic, 7 subharmonic and/or 11 times and above harmonic wave time, corresponding switching 5 LC filter branch, 7 LC filter branch and 11 times and with high-pass filtering last time branch road.
In the method, the switching carrying out corresponding number of times passive filtering branch road described in is realized by low-voltage combination switch.
When the described harmonic number according to electrical network determines the number of times passive filtering branch road of institute's switching, can manual switching, after also can harmonic number being detected, automatic switching, does not limit here.
In the method, APF or SVG compensates between branch road and electrical network and is also in series with low-tension fuse, is parallel with lightning rod branch road, and protection APF or SVG compensates branch road.
In the method, be also in series with low-tension fuse between each not homogeneous passive filtering branch road of described multiple not homogeneous passive filtering branch road and electrical network, be parallel with lightning rod branch road, protect each not homogeneous passive filtering branch road.
Below lift an object lesson to illustrate
Certain industrial cousumer, such as intermediate frequency power supply workshop, configure one, 1250 kilowatts of (kva) transformers, be mainly intermediate frequency furnace and power, and for melting and the processing of metal, also has motor load in workshop.Intermediate frequency furnace is powered by intermediate frequency power supply, is in operation and can produces a large amount of harmonic pollution, and part motor is powered by variable frequency power supply also can produce harmonic wave, in the scheme of electric power in this workshop except consideration reactive power compensation, also will carry out harmonic wave control.
Intermediate frequency furnace in the course of the work, produces a large amount of harmonic waves, and characteristic harmonics is mainly maximum with 5 times, and 7 times, 11 times, 13 subharmonic are also larger, and electric current and voltage distortion is serious.Therefore, adopt the reactive power compensation filtering device that the utility model embodiment provides, 5 LC filter branch are then set, 7 LC filter branch and 11 times and above high-pass filtering branch road, absorb 5, 7, the harmonic wave of 11 times and above number of times, wherein 5 LC filter branch reactive capabilities are 187kvar, the reactive capability of 7 LC filter branch and 11 times and above high-pass filtering branch road is respectively 94kvar, it is 94kvar that the SVG adopting the utility model embodiment to provide compensates tributary capacity, the switching being compensated branch road by above each filter branch and SVG coordinates the smooth adjustment that just can realize in-94kvar (perception)-469kvar (capacitive) scope.
Concrete regulation strategy is as follows:
In-94kvar-94kvar scope, SVG compensates branch road and puts into operation, and 5,7,11 times filter branch is out of service;
Within the scope of 94kvar-188kvar, SVG compensates branch road and puts into operation, 7 or 11 filter branch operations (or 5 branch roads run, and SVG compensates branch road and is operated in perception);
Within the scope of 188kvar-282kvar, SVG compensates branch road and puts into operation, 5,7 filter branch operations (or 5 branch roads run, and SVG compensates branch road and is operated in capacitive);
Within the scope of 282var-375kvar, SVG compensates branch road and puts into operation, and 5,7 or 11 times filter branch runs;
Within the scope of 375kvar-469kvar, SVG compensates branch road and puts into operation, and 5,7,11 times filter branch runs;
If only adopt SVG to compensate branch road scheme realize above function, the capacity that SVG compensates branch road needs 469kvar, adds equipment cost.
As can be seen from such scheme, the utility model embodiment make use of SVG and compensates branch road and realize the dynamic compensation of reactive capability and level and smooth step-less adjustment based on the not homogeneous passive filtering branch circuit parallel connection of the second low-voltage combination switch switching, the switching of homogeneous passive filtering branch road is not realized by the second low-voltage combination switch, rush of current and the voltage oscillation of capacitor switching moment can be eliminated, the nothing realizing not homogeneous passive filtering branch road impacts automatic switching, obtains reasonable harmonic suppression effect.
The reactive power compensation filtering device that the utility model embodiment provides and method safety is reliable, maintenance cost is low, loss is little, fast response time and equipment cost low, can use in the presence of a harsh environment.Be specially adapted to the demand of electric power system, effectively can solve dynamic passive compensation and the harmonics restraint problem of electric power system, invest little, return rate is high and obvious energy conservation.
More than lift preferred embodiment; the purpose of this utility model, technical scheme and advantage are further described; be understood that; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement and improvement etc., all should be included within protection range of the present utility model.
Claims (7)
1. a reactive power compensation filtering device, is characterized in that, comprising: silent oscillation dynamic reactive generator or active filter compensate branch road (10) and multiple not homogeneous passive filtering branch road (20), wherein,
Silent oscillation dynamic reactive generator or active filter compensate branch road (10), be composed in series by insulated gate bipolar transistor power model (101) and the first reactor (102), be linked in electrical network (30) by star connection parallel connection;
Not homogeneous passive filtering branch road (20), is composed in series by not homogeneous filtering capacitor (201) and the second reactor (202), is linked in electrical network (30) by star connection parallel connection.
2. device as claimed in claim 1, it is characterized in that, described first reactor (102) is filtering air core reactor; Second reactor (202) is iron-core reactor.
3. filter as claimed in claim 1, it is characterized in that, silent oscillation dynamic reactive generator or active filter compensate branch road (10) and also comprise the first low-voltage combination switch (103), be connected between the first reactor (102) and electrical network (30), compensate branch road (10) to electrical network (30) for switching silent oscillation dynamic reactive generator or active filter.
4. device as claimed in claim 1 or 2, is characterized in that,
Silent oscillation dynamic reactive generator or active filter compensate branch road (10) and also comprise the first low-tension fuse (104), are connected between the first reactor (102) and the first low-voltage combination switch (103);
Silent oscillation dynamic reactive generator or active filter compensate branch road (10) also first lightning arrester branch road (105) in parallel between the first low-tension fuse (104) with the first low-voltage combination switch (103).
5. device as claimed in claim 1, it is characterized in that, homogeneous passive filtering branch road (20) does not also comprise the second low-voltage combination switch (203), be connected between the second reactor (202) and electrical network (30), for switching not homogeneous passive filtering branch road (20) to electrical network (30).
6. the device as described in claim 1 or 5, it is characterized in that, homogeneous passive filtering branch road (20) does not also comprise the second low-tension fuse (204), is connected between the second reactor (202) and the second low-voltage combination switch (203);
Not homogeneous passive filtering branch road (20) also second lightning arrester branch road (205) in parallel between the second low-tension fuse (204) with low-voltage combination switch (203).
7. device as claimed in claim 1, is characterized in that, homogeneous passive filtering branch road (20) does not comprise 5 LC filter branch, 7 LC filter branch and 11 times and with one or more combinations of high-pass filtering last time branch road.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578107A (en) * | 2015-01-05 | 2015-04-29 | 国网瑞盈电力科技（北京）有限公司 | Reactive compensation filtering device and method |
| CN105490289A (en) * | 2016-01-26 | 2016-04-13 | 中交一航局安装工程有限公司 | Reactive power compensation system for coal harbor |
| CN105552930A (en) * | 2016-03-15 | 2016-05-04 | 河南隆鑫电力设备有限公司 | Distribution transform reactive compensation method and device |
| CN106329542A (en) * | 2015-07-10 | 2017-01-11 | 美登思电气（上海）有限公司 | Control method and system for reactive power compensation device |
| CN108011379A (en) * | 2018-01-25 | 2018-05-08 | 中国矿业大学(北京) | Advanced Static Var Compensator based on single stage shift module level parallel-type inverter |
| CN108063445A (en) * | 2018-01-24 | 2018-05-22 | 中国矿业大学(北京) | Advanced Static Var Compensator based on Mixed cascading bridge-type convertor circuit |
| CN108233392A (en) * | 2018-01-24 | 2018-06-29 | 中国矿业大学(北京) | Based on Advanced Static Var Compensator of the cascade without bridging current circuit |
| CN108306310A (en) * | 2018-01-24 | 2018-07-20 | 中国矿业大学(北京) | Advanced Static Var Compensator based on cascade diode H bridges |
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2015
- 2015-01-05 CN CN201520005373.8U patent/CN204349457U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578107A (en) * | 2015-01-05 | 2015-04-29 | 国网瑞盈电力科技（北京）有限公司 | Reactive compensation filtering device and method |
| CN106329542A (en) * | 2015-07-10 | 2017-01-11 | 美登思电气（上海）有限公司 | Control method and system for reactive power compensation device |
| CN105490289A (en) * | 2016-01-26 | 2016-04-13 | 中交一航局安装工程有限公司 | Reactive power compensation system for coal harbor |
| CN105552930A (en) * | 2016-03-15 | 2016-05-04 | 河南隆鑫电力设备有限公司 | Distribution transform reactive compensation method and device |
| CN108063445A (en) * | 2018-01-24 | 2018-05-22 | 中国矿业大学(北京) | Advanced Static Var Compensator based on Mixed cascading bridge-type convertor circuit |
| CN108233392A (en) * | 2018-01-24 | 2018-06-29 | 中国矿业大学(北京) | Based on Advanced Static Var Compensator of the cascade without bridging current circuit |
| CN108306310A (en) * | 2018-01-24 | 2018-07-20 | 中国矿业大学(北京) | Advanced Static Var Compensator based on cascade diode H bridges |
| CN108011379A (en) * | 2018-01-25 | 2018-05-08 | 中国矿业大学(北京) | Advanced Static Var Compensator based on single stage shift module level parallel-type inverter |
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