CN102244492A - Excitation method of self-excited magnetic-valve controllable reactor and apparatus thereof - Google Patents
Excitation method of self-excited magnetic-valve controllable reactor and apparatus thereof Download PDFInfo
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Abstract
The invention relates to an excitation method of a self-excited magnetic-valve controllable reactor and an apparatus thereof. Purposes of rapid excitation and demagnetization of a reactor can be realized. The excitation of the self-excited magnetically controlled reactor is not flexible enough. The method and the apparatus of the invention can change the above disadvantage. By using the method and the apparatus of the invention, equipment performance can be greatly raised under the condition of not increasing equipment complexity and costs. The method is characterized in that: in the excitation method, a diode connecting two columns in a traditional self-excited magnetic-valve controllable reactor wiring diagram is changed into an all-controlled-device insulate-gate bipolar transistor IGBT; two thyristors and the IGBT are respectively controlled by three independent control lines; a four pillar structure is adopted in iron cores of the reactor.
Description
Technical field
The present invention relates to a kind of exciting method and device of the magnetic valve type controllable reactor of encouraging oneself, be specially the self-excitation bias current that adopts three semiconductor device control magnet controlled reactors, realize the two-way control of direct current magnetic assist and demagnetization, reach the automatic adjustment of reactor reactance value, belong to reactor arrangement technical field in the electrical engineering.
Background technology
Reactor is a kind of important electric device, in electric power system, be widely used, play effects such as restriction power-frequency overvoltage, elimination generator self-excitation, restriction switching overvoltage, reactive power compensation, secondary arc current inhibition, limiting short-circuit current peace ripple, reactor can be divided into constant reactance device and controlled reactor by characteristic, the excitation mode of controlled reactor is divided into self-excitation type and separately excited type again, self-excitation type is simple in structure, and is reliable, with low cost; The separately excited type excitation mode is flexible.
Self-excitation magnetic valve type magnet controlled reactor belongs to a kind of in the controlled reactor, the later stage seventies 20th century, The former Russian scholar has proposed a kind of saturable controlled reactor, its wiring as shown in Figure 1, middle main iron core post is divided into two, and winds with two windings up and down the mid portion interconnection on each iron core column respectively, other has two windings by the power supply of external power supply and thyristor, and consequent direct current magnetic assist oneself in two split core posts is closed and do not enter side column.Thereafter, modified model circuit is as shown in Figure 2 arranged again, promptly take out from lotus root at the mid portion of 4 windings and press and controlled rectification, thereby produce same direct current magnetic assist, its work winding and control winding combine, and this helps reducing loss, simplified structure.Simultaneously, the pars intermedia of main iron core post sets up a plurality of small size sections separately, the state that reaches capacity when being beneficial to big magnetic flux, Here it is magnetic valve type controllable reactor.It is low that it has operating voltage, and manufacturing process is simple, and cost is low, and reactance value is adjustable continuously, reliability height, plurality of advantages such as floor space is little.The major defect of magnetic valve type controllable reactor is that the response time is long, and noise is bigger than normal.
At present, the self-excitation magnetic valve type controllable reactor still adopts connection type shown in the accompanying drawing 2, by direct current magnetic assist circuit as can be known, this wiring plays a role when direct current magnetic assist electric current is ascending, but when needs reduce reactor capacity, increase reactance value, then do not have effective means and reduce DC excitation, only consume dc energy storage in the reactor by coil resistance, because the coil resistance of reactor is very little, reducing direct current magnetic assist electric current by it needs for a long time, compare with the magnetic assist time, the degaussing time is up to more than 10 times.In order to improve the harmonic performance of reactor, often need reactor is designed to degree of depth saturated, but the degaussing time of dark saturation condition reactor will be longer.And the response speed of controlled reactor all is two indexs of equal importance in most of application scenarios no matter be electric current positive response time or the electric current inverse response time from big to small from small to large.
Chinese invention patent " a kind of magnetic control type paralleling reactor controllable afterflow method and excitation system " (application number: be 200810105711.X) at the employed a kind of excitation system of separately excited type magnet controlled reactor of using external power source; Patent of invention " compound rectifier excitation trigger, two excitation winding MCR type magnet controlled reactor " (application number: 201110066597.6) proposed a kind of magnet controlled reactor can realize quick-response excitation and demagnetization method, to use additional winding and external power source in its method, its essence mainly is to make reactor reach the purpose of quick-response excitation and demagnetization by its excitation mode, this method increases the equipment complexity, and the negative interaction that brings is that cost increases and reliability reduces.
A kind of employing self-excitation type excitation mode under the prerequisite that does not increase equipment complexity and cost, can make reactor obtain the exciting method and the device of quick magnetic assist and demagnetization, does not see in disclosed patent or other academic documents.
Summary of the invention
The objective of the invention is problem at the background technology proposition, a kind of exciting method and device of self-excitation type controlled reactor are provided, can realize the quick-response excitation and the demagnetization purpose of reactor, changed the shortcoming of self-excitation type magnet controlled reactor excitation underaction, under the prerequisite that does not increase equipment complexity and cost, significantly improve the method and the device of the performance of equipment, this apparatus structure is simple, reliable, with low cost.
Technical scheme of the present invention is: the exciting method of self-excitation magnetic valve type controllable reactor, it is characterized in that: described exciting method is to make to control full the tradition diode that connects between two posts in the magnetic valve type reactor winding diagram of encouraging oneself into device IGBT, two thyristors and IGBT are respectively by three independently control line controls, by controlling two conducting moment that thyristor is different with IGBT, can make the reactor tap be operated in rectification pattern or inverter mode respectively.Its beneficial effect is: when being operated in the rectification pattern, the DC excitation electric current increases or remains unchanged, and when being operated in inverter mode, the DC excitation electric current reduces rapidly, thereby reaches the purpose of quick change reactor reactance value.
The self-excitation magnetic valve type controllable reactor, it is characterized in that: described core of reactor is to adopt four rod structures, the middle part of two column iron cores in the middle of being positioned at, the fluting that a small bore is arranged, the winding that the tap of two bands is arranged respectively up and down, four windings on two posts are interconnections in the centre, and same post two taps up and down is connected with thyristor respectively, and winding is connected with the IGBT device between two posts.Its beneficial effect is: center tap can not only be operated in rectification state, it can also be operated in inverter mode, making reactor DC excitation electric current is not to be diminished by winding impedance slow consumption energy, but the inverter mode that mainly relies on tap makes winding bear direct reverse voltage, energy back is given electrical network and the DC excitation electric current is reduced fast, make that the very long response time shortened greatly when originally the reactor capacity reduced, it even the response time when increasing less than the reactor capacity.
Operation principle of the present invention is:
1, the relation of DC excitation and reactor reactance value.Core of reactor is laminated by silicon steel sheet, because silicon steel sheet is the good material of a kind of magnetic conductivity, iron core reactor is compared air core reactor very big reactance value, but, the magnetic property of silicon steel sheet is not linear, when magnetic flux density reaches certain numerical value, saturated phenomenon can occur, magnetic property descends rapidly, and its magnetic characteristic curve as shown in Figure 5.If iron core is operated in saturation condition, the reactance value of reactor can reduce.Magnetic valve type controllable reactor is exactly to utilize this principle to regulate the reactance value of reactor.
Because two posts are made up of heavy in section section and small bore section in the middle of the iron core, when reactor applies rated voltage, the equal insatiable hunger of size section does not conform to, this moment reactor reactance value maximum, the alternating current minimum that flows through, capacity is in minimum state, when having direct current to flow through in the reactor winding, the small bore section can enter saturation condition along with the cyclic variation of alternating current, and its time that is operated in saturation condition can extend along with the increase of direct current, when direct current is increased to certain numerical value, small bore will be operated in saturation condition always, at this moment, and the reactance value minimum of reactor, the alternating current maximum that flows through, capacity reaches rated value.In a word, the increase of the direct current that flows through along with its winding inside of the reactance value of magnetic valve type controllable reactor reduces.It should be noted that heavy in section iron leg core is full at no time closes.Fig. 6 and Fig. 7 be reactor small bore section respectively at unsaturated and full current pattern when saturated, the magnetic characteristic curve of silicon steel sheet comes match by two sections straight lines among the figure.Can see intuitively that from figure the operating current among Fig. 7 is obviously much bigger than the operating current among Fig. 6.
2, center tap is operated in rectification state.This moment, tap voltage was used for producing DC excitation, and the reactor reactance value reduces, and capacity increases.When bearing just down on the operating voltage, produce thyristor K1 triggering signal, because K1 bears positive voltage, IGBT device K3 bears counter voltage, the K1 conducting, electric current flows through from K1, and the pc equivalent circuit of controlled reactor is as shown in Figure 8 at this moment; Negative timing down on operating voltage produces thyristor K2 triggering signal, because K2 bears positive voltage, IGBT device K3 bears counter voltage, the K2 conducting, and electric current flows through from K2, and the pc equivalent circuit of controlled reactor is as shown in Figure 9 at this moment.No matter above which kind of state, all be to make winding produce an anticlockwise direct current, left side column iron core was operated under the positive magnetic flux magnetic bias condition in the middle of this direct current made, middle the right column iron core is operated under the negative magnetic flux magnetic bias condition the right and left symmetry.The logical big I of its magnetic bias is by the angle of flow size control of K1 and K2.From the relation of the DC excitation of last surface analysis and reactor reactance value as can be known, when their angle of flow became big, the DC excitation electrorheological was big, and corresponding reactance value diminishes, and it is big that capacity becomes.
When center tap was operated in rectification state, the effect of K3 was equivalent to a diode, and the K3 control end adds that always high level gets final product, as long as its both end voltage is timing, it is with regard to conducting.
The thyristor of rectification state and IGBT control timing are as shown in figure 10, among the figure, (1) is operating voltage, (2) be middle left side post winding current, (3) be middle the right post winding current, (4) are thyristor K1 triggering signals, and (5) are thyristor K2 triggering signals, (6) be the IGBT triggering signal, t1 and t2 are respectively the conducting moment of thyristor K1 and K2.Adjust t1 and t2, can change the angle of flow of thyristor K1 and K2, thereby change the average commutating voltage of tap, make it become a controllable voltage source, produce a controlled DC excitation electric current, reach the purpose of adjusting the reactor reactance value with it.
3, center tap is operated in inverter mode.This moment, the DC excitation electric current was given electrical network by tap with energy delivery, and the DC excitation electric current reduces, and the reactor reactance value increases, and capacity reduces.
When reactor was operated in big capacity, this moment, the DC excitation current ratio was bigger, adjusted thyristor and IGBT control signal, just can make tap be operated in inverter mode.Its work schedule is had suffered not conducting of inversion process IGBT as shown in figure 13, is changeed t1 moment before negative by just (on just down negative) in operating voltage, produce thyristor K1 triggering signal, make the K1 conducting, after the K1 conducting, operating voltage is reverse, because not conducting of K3, electric current under the effect of inductance, continue to be flow through by K1, because operating voltage is reverse, make also direction of tap voltage, the DC excitation electric current that the tap voltage of this moment will soaking reactor is given electrical network with energy back.Its pc equivalent circuit as shown in figure 11 when the K1 conducting, when the K2 conducting its pc equivalent circuit as shown in figure 12, as can be seen from Figure, the tap voltage of inverter mode is opposite with the tap voltage direction of rectification state, his effect is also opposite with rectification state, reduces the DC excitation electric current exactly.The key that tap can be operated in inverter mode is, K3 can be operated in off state, if K3 is not a turn-off device IGBT, but traditional diode, so when the operating voltage direction, diode K3 will bear forward voltage, and electric current flows through from diode, and tap also the inversion operating state can not occur.
Description of drawings
Accompanying drawing 1 is a saturable controlled reactor elementary diagram;
Accompanying drawing 2 is a modified model saturable controlled reactor elementary diagram;
Accompanying drawing 3 is the exciting method elementary diagram of embodiment of the invention self-excitation magnetic valve type controllable reactor;
Accompanying drawing 4 is embodiment of the invention self-excitation magnetic valve type controllable reactor structure and winding diagram;
Accompanying drawing 5 is the magnetic characteristic curve figure of silicon steel sheet;
Accompanying drawing 6 is that reactor small bore section is at the undersaturated condition current pattern;
Accompanying drawing 7 is the full saturation condition current pattern of reactor small bore section;
Accompanying drawing 8 is the pc equivalent circuit figure when negative just down on the rectification state operating voltage;
Accompanying drawing 10 is the thyristor and the IGBT control timing figure of rectification state;
Pc equivalent circuit figure when accompanying drawing 11 is inverter mode work K1 conducting;
Pc equivalent circuit figure when accompanying drawing 12 is inverter mode work K2 conducting;
Accompanying drawing 13 is the inverter mode working timing figure.
Embodiment
Mark in the accompanying drawing:
In accompanying drawing 3, the accompanying drawing 4: K1-thyristor, K2-thyristor, K3-control full device IGBT;
In accompanying drawing 8, accompanying drawing 9, accompanying drawing 11, the accompanying drawing 12: R1, R2, R3, R4-equivalent resistance, U1, U2, U3, U4-equivalent voltage source;
In the accompanying drawing 14: the single-phase four-column type iron core of 4-reactor, 5,6,7,8-winding, the small bore section of 9-middle two column iron cores.
Below in conjunction with accompanying drawing inventive embodiments is described further:
With reference to accompanying drawing 3, technical scheme of the present invention is to make to control full the tradition diode that connects between two posts in the winding diagram of magnetic valve type reactor of encouraging oneself into device IGBT, two thyristors and IGBT are respectively by three independently control line controls, by controlling two conducting moment that thyristor is different with IGBT, can make the reactor tap be operated in rectification pattern or inverter mode respectively.When being operated in the rectification pattern, the DC excitation electric current increases or remains unchanged, and when being operated in inverter mode, the DC excitation electric current reduces rapidly, thereby reaches the purpose of quick change reactor reactance value.
With reference to accompanying drawing 4, in the embodiment of the invention, core of reactor adopts four rod structures, there is the fluting of a small bore at the middle part of middle two posts, the winding that the tap of two bands is arranged respectively up and down, four windings on two posts connect in intermediate interdigitated, and same post two taps up and down is connected with K2 by thyristor K1 respectively, connect with full control device IGBT between two posts.
Referring to accompanying drawing 4, be one embodiment of the present of invention, the 400V/10kVA magnetic valve type controllable reactor of encouraging oneself.Core of reactor, winding, thyristor and, control the device wiring as shown in the figure entirely, wherein K1, K2 are thyristors, K3 is controlled device IGBT entirely, the 4th, the single-phase four-column type iron core of reactor, the 5th, winding on the middle left side post of band tap, the 6th, winding under the middle left side post of band tap, the 7th, winding on the post of the right in the middle of the band tap, the 8th, winding under the post of the right in the middle of the band tap, the 9th, the small bore section of middle two column iron cores.Winding 5 upper ends and winding 6 upper ends connect connection, winding 6 lower ends are connected with winding 8 lower ends, winding 5 lower ends are connected with winding 8 upper ends, winding 7 lower ends are connected with winding 6 upper ends, and the tap of winding 5 is connected with thyristor K1 is anodal, and 6 taps of winding are connected with thyristor K1 negative pole, the tap of winding 7 is connected with thyristor K2 negative pole, the tap of winding 8 and thyristor K2 are anodal to be connected, winding 5 lower ends and full control device K3(IGBT) the anodal connection, winding 7 lower ends and control device K3(IGBT entirely) negative pole is connected.
Winding 5,6,7,8 all is 116 circles, and tap all is 8 circles, and the area of iron core small bore section is 1/3rd of a heavy in section section area, and the length of small bore is 10 millimeters.
Claims (2)
- The self-excitation magnetic valve type controllable reactor exciting method, it is characterized in that: described exciting method is to make to control full the tradition diode that connects between two posts in the magnetic valve type reactor winding diagram of encouraging oneself into device IGBT, two thyristors and IGBT are respectively by three independently control line controls, by controlling two conducting moment that thyristor is different with IGBT, can make the reactor tap be operated in rectification pattern or inverter mode respectively.
- 2. self-excitation magnetic valve type controllable reactor, it is characterized in that: described core of reactor is to adopt four rod structures, the middle part of two column iron cores in the middle of being positioned at, the fluting that a small bore is arranged, the winding that the tap of two bands is arranged respectively up and down, four windings on two posts are interconnections in the centre, and same post two taps up and down is connected with thyristor respectively, and winding is connected with the IGBT device between two posts.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103066908A (en) * | 2012-12-11 | 2013-04-24 | 河北旭辉电气股份有限公司 | Quick response magnetic control electric reactor |
| CN103500633A (en) * | 2013-10-10 | 2014-01-08 | 中国船舶重工集团公司第七一二研究所 | Magnetically controlled reactor |
| CN103684164A (en) * | 2012-09-26 | 2014-03-26 | 北京三得普华科技有限责任公司 | Magnetically-controlled reactor |
| CN103684163A (en) * | 2012-09-26 | 2014-03-26 | 北京三得普华科技有限责任公司 | Magnetically-controlled reactor |
| CN103971894A (en) * | 2014-05-27 | 2014-08-06 | 田村（中国）企业管理有限公司 | Magnetic coupling inductor and magnetic core thereof |
| CN104377013A (en) * | 2013-08-13 | 2015-02-25 | 青岛菲特电器科技有限公司 | Self-excitation valve type controllable reactor |
| CN104916409A (en) * | 2015-07-02 | 2015-09-16 | 兰州交通大学 | Rapid response type self-excitation magnetically controlled reactor |
| CN105119545A (en) * | 2015-08-13 | 2015-12-02 | 杭州银湖电气设备有限公司 | Rapid response magnetically controlled reactor device with novel voltage source control |
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| CN103684163B (en) * | 2012-09-26 | 2016-09-14 | 北京三得普华科技有限责任公司 | Magnet controlled reactor |
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| CN105119545A (en) * | 2015-08-13 | 2015-12-02 | 杭州银湖电气设备有限公司 | Rapid response magnetically controlled reactor device with novel voltage source control |
| CN105119545B (en) * | 2015-08-13 | 2018-09-07 | 杭州银湖电气设备有限公司 | A kind of quick response magnet controlled reactor device of voltage source control |
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