CN102904263A - Quick magnetizing and demagnetizing device based on magnetically controlled reactor (MCR) - Google Patents

Quick magnetizing and demagnetizing device based on magnetically controlled reactor (MCR) Download PDF

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Publication number
CN102904263A
CN102904263A CN2012103763528A CN201210376352A CN102904263A CN 102904263 A CN102904263 A CN 102904263A CN 2012103763528 A CN2012103763528 A CN 2012103763528A CN 201210376352 A CN201210376352 A CN 201210376352A CN 102904263 A CN102904263 A CN 102904263A
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quick
mcr
igbt
circuit
diode
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CN2012103763528A
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CN102904263B (en
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尹忠东
刘海鹏
赵士硕
李和明
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North China Electric Power University
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North China Electric Power University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30Reactive power compensation

Abstract

The invention discloses a quick magnetizing and demagnetizing device based on a magnetically controlled reactor (MCR), belonging to the technical field of dynamic reactive power compensation. The device comprises a power system, an MCR body, a quick magnetizing circuit 3 and a quick demagnetizing circuit 4, wherein the upper and lower two input-output ends of the MCR body are connected with the power system 1; the MCR body internally comprises two iron cores; coils L1 and L2, L3 and L4 are wound on the two iron cores respectively and the four groups of iron cores are of cross parallel structures; taps are led out from the middle of the upper and lower two groups of coils on each iron core; a semiconductor control rectifier (SCR) component is connected between the two taps of the same iron core; and the quick magnetizing circuit and the quick demagnetizing circuit are connected between cross connection points of the four groups of coils on the two iron cores. The device has the advantages that the continuously adjustable reactive power and the safe and stable working of the MCR are kept; and the response speed of the MCR is accelerated obviously so that the response speed of the MCR from an idle load to a rated capacity and from the rated capacity to the idle load can be maintained within a power frequency period.

Description

A kind of quick-response excitation and demagnetizer based on magnet controlled reactor
Technical field
The invention belongs to the dynamic reactive power compensation technical field, a kind of quick-response excitation and demagnetizer of magnet controlled reactor particularly is provided.
Background technology
Reactive balance is to the economic benefit that improves electrical network and to improve power supply quality most important, and the formation of the large electrical network of superhigh pressure and load variations aggravation require a large amount of fast adjustable reactive-load compensation equipment of response to adjust voltage, keep System Reactive Power trend balance, reduce loss, improve power supply reliability.Magnetic valve type controllable reactor (referred to as MCR, Magnetically Controlled Reactor) has obtained increasing application in Electrical Power System Dynamic Reactive Power Control field, but also has many deficiencies.At first, when MCR was operated in incomplete saturation condition, its harmonic content was higher, thereby needed to add the auxiliary filter device or improve the MCR structure its harmonic wave is optimized; Secondly, MCR response time and tapping ratio are inversely proportional to, for jumbo MCR, the value of tapping ratio is normally very little, this has seriously restricted the scope of application of MCR so that the response time of MCR has reached the hundreds of millisecond, thereby the response time of how to improve MCR has just become the task of top priority.The present invention namely proposes for the deficiency of MCR response speed aspect.
Summary of the invention
The object of the present invention is to provide a kind of quick-response excitation and demagnetizer of magnet controlled reactor, be used for the quick dynamic passive compensation of electric power system.But it makes it continuous carry out reactive power compensation to system based on the voltage on the break-make control capacitance of IGBT in the control boost chopper; Realize the quick-response excitation of magnet controlled reactor based on the high voltage capacitor discharge; Quick demagnetization based on discharge resistance loop realization magnet controlled reactor has more preferably quick performance than traditional MCR.
For achieving the above object, the present invention is achieved through the following technical solutions:
The present invention includes electric power system 1, MCR body 2, quick-response excitation circuit 3(quick-response excitation circuit is made of boost chopper 5 and large bulk capacitance and IGBT), quick demagnetization circuit 4(quick demagnetization circuit is made of IGBT and high-power high resistance measurement).The up and down two input/output terminals access electric power system 1 of MCR body 2 comprises two iron cores in the MCR body 2, be wound with respectively coil L on two iron cores 1And L 2, L 3And L 4, four groups of coils are the alter-parallel structure; Tap is drawn in up and down two groups of coils centres from each iron core, is connected to SCR half control device between same iron core two taps.Between the cross-connection point of four groups of coils on two iron cores, be connected to quick-response excitation circuit 3 and quick demagnetization circuit 4.
In described quick-response excitation circuit 3 and the quick demagnetization circuit 4: sustained diode 1Series IGBT 2Full control device consists of the afterflow branch road, and at IGBT 2The diode D that the two ends inverse parallel shields 2, with sustained diode 1And IGBT 2With the diode D that shields 2The afterflow branch road that consists of is connected between coil crosspoint e, the f on two iron cores of MCR body 2; The output of boost chopper 5 and connect large capacity exciting capacity C two ends, again series IGBT in the quick-response excitation circuit 3 1With diode D 3After, its integral body is attempted by sustained diode 1Two ends are in this circuit, at IGBT 1The diode D that the two ends inverse parallel shields 4The quick demagnetization circuit is by IGBT 3And inverse parallel is at IGBT 3The diode D that two ends shield 4With the diode D that plays the effect of prevention reverse direction current flow 5After high-power high value circuit R series connection, integral body is attempted by IGBT in the afterflow branch road 2Two ends.
When needs are applied in MCR when carrying out reactive power compensation in the different brackets electrical voltage system, only need step-up ratio in the control boost chopper just can conveniently realize the change of exciting voltage; Exciting capacity also can be changed different capacity according to actual needs with demagnetizing resistance.In the magnet controlled reactor running, all IGBT and SCR are controlled by DSP.
Be summarized as follows based on the quick-response excitation of magnet controlled reactor and the operation principle of demagnetizer.
According to the application of MCR in the different electric pressure of reality system, the duty of IGBT recently arranges suitable voltage in the control boost chopper in the quick-response excitation circuit, gives exciting capacity C charging, makes the voltage on the electric capacity reach the needed value of quick-response excitation.When MCR puts into operation, service time by control and the IGBT that is in series of boost chopper (for control simply, the duty ratio of IGBT is immobilized), make exciting capacity carry out the magnet excitation triggering to the control winding of MCR, the value when making the control electric current in a power frequency period, reach steady operation.And when MCR stopped that system carried out reactive power compensation, moment was dropped into degausser, and the IGBT in the afterflow branch road is disconnected, and made operating current reduce to zero from the steady operation value in a power frequency period, thereby realized quick demagnetization.The sequencing of two IGBT of control is to occur large impulse current in the circuit in order to prevent in the quick demagnetization operation.After finishing single compensation, the control boost chopper is again to the exciting capacity charging, for next reactive power compensation is prepared.
The invention has the advantages that:
1, the reactive power that has not only the kept MCR advantages such as adjustable, work safety is stable have continuously also significantly been accelerated the response speed of MCR, so that the response speed of MCR from the zero load to the rated capacity and from the rated capacity to the zero load all reaches in the power frequency period;
What 2, but the voltage on the break-make control capacitance of IGBT can guarantee that MCR can be continuous in the control boost chopper carries out reactive power compensation to system;
3, the duty specific energy by IGBT in the control boost chopper is not changing the MCR tapping than the reactive power compensation that is applied under the condition in the different electric pressure electric power systems.
Description of drawings
Fig. 1 is based on the quick-response excitation of MCR and the circuit structure diagram of demagnetizer.Wherein, electric power system 1, self-excitation type magnet controlled reactor body 2, quick-response excitation circuit 3, quick demagnetization circuit 4, boost chopper 5.
Embodiment
The present invention includes electric power system 1, MCR body 2, quick-response excitation circuit 3(quick-response excitation circuit is made of boost chopper 5 and large bulk capacitance and IGBT), quick demagnetization circuit 4(quick demagnetization circuit is made of IGBT and high-power high resistance measurement).The up and down two input/output terminals access electric power system 1 of MCR body 2 comprises two iron cores in the MCR body 2, be wound with respectively coil L on two iron cores 1And L 2, L 3And L 4, four groups of coils are the alter-parallel structure; Tap is drawn in up and down two groups of coils centres from each iron core, is connected to SCR half control device between same iron core two taps.Between the cross-connection point of four groups of coils on two iron cores, be connected to quick-response excitation circuit 3 and quick demagnetization circuit 4.
The present invention propose based on the quick-response excitation of MCR and demagnetizer as shown in Figure 1.
The two ends g of electric power system 1, h input voltage are as the operating voltage of magnet controlled reactor.
Comprise two iron cores in the MCR body 2, be wound with respectively coil L on two iron cores 1And L 2, L 3And L 4, four groups of coils are the alter-parallel structure; From L 1Coil is drawn tap a and is met controllable silicon KP 1Anode, L 2The tap b that coil is drawn meets controllable silicon KP 1Negative electrode; L 3The tap c that coil is drawn meets controllable silicon KP 2Negative electrode, L 4The tap d that coil is drawn meets controllable silicon KP 2Anode.During normal operation, by control controllable silicon KP 1And KP 2The angle of flow control the saturation of magnet controlled reactor, thereby in the electric power system 1 the perceptual offset currents of the different sizes of input.
Self-excitation type magnet controlled reactor body connects quick-response excitation circuit 3 between winding cross-connection point e and f point about in the of 2, be specially: the e point meets diode D 1Anode, diode D 1Negative electrode meet IGBT 2Collector electrode, IGBT 2Emitter take back the f point.Diode D 2Inverse parallel is at IGBT 2Two ends, to IGBT 2Shield.Diode D between e, f point 1And IGBT 2Consist of the continuous current circuit of magnet controlled reactor, and the break-make in this loop is by IGBT 2Controlled.Simultaneously, diode D 1The negative pole (-) of anodic bonding boost chopper 5 and the negative pole (-) of capacitor C, the positive pole (+) of boost chopper 5 and the positive pole (+) of capacitor C meet IGBT 1Collector electrode, IGBT 1Emitter meet diode D 3Anode, diode D 3Negative electrode meet diode D 1Negative electrode.。Diode D 4Inverse parallel is at IGBT 1Two ends, to IGBT 1Shield diode D 3Then prevent reverse direction current flow.When magnet controlled reactor begins to compensate, by control IGBT 1Conducting makes the voltage on the capacitor C act on magnet controlled reactor, reaches the purpose of quick-response excitation.
At IGBT 2Two ends quick demagnetization circuit 4 in parallel, be specially: IGBT 2Collector electrode meet IGBT 3Collector electrode, IGBT 3Emitter meet diode D 5Anode, diode D 5Negative electrode connect an end of quick demagnetization resistance R, the other termination IGBT of R 2Emitter.Diode D 6Inverse parallel is at IGBT 3Two ends, to IGBT 3Shield diode D 5Then prevent reverse direction current flow.When magnet controlled reactor finishes compensation, IGBT 3Elder generation's conducting, after 0.005 second, IGBT 2Disconnect, allow the electric current demagnetizing resistance R that flows through, realize the effect of quick demagnetization, IGBT 3Elder generation's conducting, IGBT 2Prevent from circuit is impacted during rear disconnection.
IGBT in this circuit, and the intrinsic MCR of magnet controlled reactor all uses DSP control, exciting capacity C uses the high-voltage large-capacity device, and the quick demagnetization resistance R is used high-power high value device.

Claims (3)

1. quick-response excitation and demagnetizer based on a magnet controlled reactor is characterized in that, comprise electric power system (1), MCR body (2), quick-response excitation circuit (3), quick demagnetization circuit (4); The up and down two input/output terminals access electric power system (1) of MCR body (2) comprises two iron cores in the MCR body (2), be wound with respectively coil L on two iron cores 1And L 2, L 3And L 4, four groups of coils are the alter-parallel structure; Tap is drawn in up and down two groups of coils centres from each iron core, is connected to SCR half control device between same iron core two taps; Between the cross-connection point of four groups of coils on two iron cores, be connected to quick-response excitation circuit (3) and quick demagnetization circuit (4);
Described quick-response excitation circuit is by boost chopper (5) and large bulk capacitance and IGBT formation;
Described quick demagnetization circuit is made of IGBT and high-power high resistance measurement.
2. quick-response excitation according to claim 1 and demagnetizer is characterized in that, in described quick-response excitation circuit (3) and the quick demagnetization circuit (4): sustained diode 1Series IGBT 2Full control device consists of the afterflow branch road, and at IGBT 2The diode D that the two ends inverse parallel shields 2, with sustained diode 1And IGBT 2With the diode D that shields 2The afterflow branch road that consists of is connected between coil crosspoint e, the f on two iron cores of MCR body (2); The output of the middle boost chopper (5) of quick-response excitation circuit (3) also connects large capacity exciting capacity C two ends, again series IGBT 1With diode D 3After, its integral body is attempted by sustained diode 1Two ends are in this circuit, at IGBT 1The diode D that the two ends inverse parallel shields 4The quick demagnetization circuit is by IGBT 3And inverse parallel is at IGBT 3The diode D that two ends shield 4With the diode D that plays the effect of prevention reverse direction current flow 5After high-power high value circuit R series connection, integral body is attempted by IGBT in the afterflow branch road 2Two ends.
3. according to claim 1 and 2 quick-response excitation and demagnetizer is characterized in that, when needs are applied in MCR when carrying out reactive power compensation in the different brackets electrical voltage system, only need step-up ratio in the control boost chopper just can realize the change of exciting voltage; Exciting capacity is also changed different capacity according to actual needs with demagnetizing resistance; In the magnet controlled reactor running, all IGBT and controllable silicon are all controlled by DSP, have guaranteed the accuracy of control.
CN201210376352.8A 2012-09-29 2012-09-29 Quick magnetizing and demagnetizing device based on magnetically controlled reactor (MCR) Expired - Fee Related CN102904263B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105071407A (en) * 2015-08-26 2015-11-18 广东中钰科技股份有限公司 Magnetically controlled reactor
CN106026813A (en) * 2016-07-28 2016-10-12 李晓明 Fast response saturation reactor
CN107039986A (en) * 2017-03-13 2017-08-11 国网山东省电力公司淄博供电公司 A kind of continuous quick compensator of reactive power
CN107134957A (en) * 2017-06-12 2017-09-05 杭州银湖电气设备有限公司 Without tap magnet valve structure

Citations (2)

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Publication number Priority date Publication date Assignee Title
JP2000259268A (en) * 1999-03-10 2000-09-22 Matsushita Electric Ind Co Ltd Device for compensating static reactive power
CN201975795U (en) * 2011-03-18 2011-09-14 鞍山市恒力电气设备制造有限公司 Hybrid excitation triggering and double-core excitation winding MCR (Magnetically Controlled Reactor)

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
JP2000259268A (en) * 1999-03-10 2000-09-22 Matsushita Electric Ind Co Ltd Device for compensating static reactive power
CN201975795U (en) * 2011-03-18 2011-09-14 鞍山市恒力电气设备制造有限公司 Hybrid excitation triggering and double-core excitation winding MCR (Magnetically Controlled Reactor)

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周丽霞: "大容量输电长线可控并联补偿与潜供电弧抑制的研究", 《中国博士学位论文全文数据库工程科技Ⅱ辑》 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105071407A (en) * 2015-08-26 2015-11-18 广东中钰科技股份有限公司 Magnetically controlled reactor
CN106026813A (en) * 2016-07-28 2016-10-12 李晓明 Fast response saturation reactor
CN106026813B (en) * 2016-07-28 2018-07-03 李晓明 A kind of quick response saturable reactor
CN107039986A (en) * 2017-03-13 2017-08-11 国网山东省电力公司淄博供电公司 A kind of continuous quick compensator of reactive power
CN107039986B (en) * 2017-03-13 2020-03-17 国网山东省电力公司淄博供电公司 Reactive power continuous rapid compensation device
CN107134957A (en) * 2017-06-12 2017-09-05 杭州银湖电气设备有限公司 Without tap magnet valve structure
CN107134957B (en) * 2017-06-12 2019-05-31 杭州银湖电气设备有限公司 Without tap magnet valve structure

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