CN202159567U - Self-excitation magnetic valve type controllable reactor - Google Patents
Self-excitation magnetic valve type controllable reactor Download PDFInfo
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- CN202159567U CN202159567U CN2011202466027U CN201120246602U CN202159567U CN 202159567 U CN202159567 U CN 202159567U CN 2011202466027 U CN2011202466027 U CN 2011202466027U CN 201120246602 U CN201120246602 U CN 201120246602U CN 202159567 U CN202159567 U CN 202159567U
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Abstract
The utility model relates to a self-excitation magnetic valve type controllable reactor capable of realizing fast excitation and demagnetization, in particular to a method and a device, which avoid the defect of inflexibility in excitation of a self-excitation type magnetic-control reactor and greatly improve the equipment performance under the premise of not increasing the equipment complexity and cost. The device has the advantages of simple structure, reliability in operation and low cost, and is characterized in that the reactor core adopts a four-pillar structure, a slot with a small cross section is formed in the middles of two pillars in the middle of the core, two windings with taps are respectively arranged at the upper parts and the lower parts of the pillars, the four windings on the two pillars are in cross connection in the middle, the upper tap and the lower tap on the same pillar are respectively connected with thyristors, and the windings between the two pillars are connected with IGBT (insulated-gate bipolar transistor) devices.
Description
Technical field
The utility model relates to a kind of self-excitation magnetic valve type controllable reactor; 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 operation 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, and in the later stage seventies 20th century, The former Russian scholar has proposed a kind of saturable controlled reactor; Its wiring is shown in accompanying drawing 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 get into side column.Thereafter, again just like the modified model circuit shown in the accompanying drawing 2, 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 combines with the control winding, 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, so that reach capacity state during big magnetic flux, and Here it is magnetic valve type controllable reactor.Plurality of advantages such as it is low that it has operating voltage, and manufacturing process is simple, and cost is low, and reactance value is adjustable continuously, and reliability is high, and 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, can be known by direct current magnetic assist circuit; This wiring plays a role when direct current magnetic assist electric current is ascending; But reduce the reactor capacity at needs, when increasing reactance value, then do not have effective means and reduce DC excitation, only consume the dc energy storage in the reactor through 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, compares with the magnetic assist time, and the degaussing time is up to more than 10 times.In order to improve the harmonic performance of reactor, often need reactor be 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) to 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 through its excitation mode; This method increases the complex equipments degree, and the negative interaction that brings is that cost increases and reliability reduces.
Up to the present, adopt the self-excitation type excitation mode, under the prerequisite that does not increase equipment complexity and cost, the controlled reactor of magnetic assist and demagnetization is not shown in disclosed patent or other academic documents fast.
Summary of the invention
The purpose of the utility model is the problem that proposes to background technology, and a kind of controlled reactor that adopts the self-excitation mode is provided, and can realize the quick-response excitation and 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.
The technical scheme of the utility model is: the self-excitation magnetic valve type controllable reactor; It is characterized in that: described core of reactor is to adopt four rod structures, is positioned at the middle part of middle two column iron cores, and the fluting of 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, and making reactor DC excitation electric current is not to be diminished by winding impedance slow consumption energy, but mainly relies on the inverter mode of tap to make 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, the exciting method of the magnetic valve type controllable reactor of encouraging oneself 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; Through 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; When being operated in inverter mode, the DC excitation electric current reduces rapidly, thereby reaches the purpose of quick change reactor reactance value.
The operation principle of the utility model is:
1, the relation of DC excitation and reactor reactance value.Core of reactor is cascaded 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 has 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 is 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 applied rated voltage, the equal insatiable hunger of big or small section did not conform to; This moment, the reactor reactance value was maximum, and the alternating current that flows through is minimum, and capacity is in minimum state; When having direct current to flow through in the reactor winding, the small bore section can get into 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 was increased to certain numerical value, small bore will be operated in saturation condition always, at this moment; The reactance value of reactor is minimum, and the alternating current that flows through is maximum, and 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.From figure, can see intuitively that 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 this moment, the pc equivalent circuit of controlled reactor was as shown in Figure 8; Produce thyristor K2 triggering signal negative following correct time on operating voltage, because K2 bears positive voltage, IGBT device K3 bears counter voltage, the K2 conducting, and electric current flows through from K2, and this moment, the pc equivalent circuit of controlled reactor was as shown in Figure 9.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.Can know that from the DC excitation of last surface analysis and the relation of reactor reactance value when their angle of flow became big, the DC excitation electrorheological was big, 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 voltage is correct time, it is with regard to conducting.
The thyristor of rectification state and IGBT control timing are shown in figure 10, and 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.Adjustment 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 with it, reach the purpose of adjustment reactor reactance value.
3, center tap is operated in inverter mode.This moment, the DC excitation electric current was given electrical network through tap with NE BY ENERGY TRANSFER, 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, and adjustment thyristor and IGBT control signal just can make tap be operated in inverter mode.Its work schedule is shown in figure 13, has suffered not conducting of inversion process IGBT, operating voltage change by just (on just down negative) before negative t1 constantly, generation thyristor K1 triggering signal; Make the K1 conducting, after the K1 conducting, operating voltage is reverse, because not conducting of K3; Electric current continues to be flow through by K1, because operating voltage is reverse under the effect of inductance; 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 is shown in figure 11 when the K1 conducting; Its pc equivalent circuit is shown in figure 12 when the K2 conducting, can find out that by figure the tap voltage of inverter mode and the tap voltage of rectification state are in the opposite direction; 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 conventional 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 encourage oneself exciting method elementary diagram of magnetic valve type controllable reactor of the utility model embodiment;
Accompanying drawing 4 is the utility model embodiment encourage oneself 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 4: 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; The technical scheme of the utility model 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; Through 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; Among the utility model embodiment, core of reactor adopts four rod structures, and 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 an embodiment of the utility model, the 400V/10kVA magnetic valve type controllable reactor of encouraging oneself.Core of reactor, winding, thyristor and, to control the device wiring entirely as shown in the figure, 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 couplet, and winding 6 lower ends are connected with winding 8 lower ends, and 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 is connected with thyristor K2 is anodal, and winding 5 lower ends are connected with full control device K3 (IGBT) is anodal, and winding 7 lower ends are connected with full control device K3 (IGBT) negative pole.
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 (1)
1. self-excitation magnetic valve type controllable reactor; It is characterized in that: described core of reactor is to adopt four rod structures, is positioned at the middle part of middle two column iron cores, and the fluting of 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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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202466027U CN202159567U (en) | 2011-07-13 | 2011-07-13 | Self-excitation magnetic valve type controllable reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202466027U CN202159567U (en) | 2011-07-13 | 2011-07-13 | Self-excitation magnetic valve type controllable reactor |
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| CN202159567U true CN202159567U (en) | 2012-03-07 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244492A (en) * | 2011-07-13 | 2011-11-16 | 国网电力科学研究院 | Excitation method of self-excited magnetic-valve controllable reactor and apparatus thereof |
| CN102867629A (en) * | 2012-09-29 | 2013-01-09 | 华北电力大学 | Device for increasing response speed of magnetically controlled reactor |
| CN104064323A (en) * | 2014-05-30 | 2014-09-24 | 安徽三和电力技术有限公司 | Magnetically controlled reactor for reactive compensation cabinet |
| CN105590729A (en) * | 2015-12-28 | 2016-05-18 | 国网山东省电力公司枣庄供电公司 | Transformer with excitation reactance adjustable function |
| CN105830182A (en) * | 2013-12-10 | 2016-08-03 | 西门子公司 | Device and method for reducing a magnetic unidirectional flux component in the core of a three-phase transformer |
| CN107430932A (en) * | 2015-04-15 | 2017-12-01 | 三菱电机株式会社 | Internal combustion engine ignition coil |
-
2011
- 2011-07-13 CN CN2011202466027U patent/CN202159567U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244492A (en) * | 2011-07-13 | 2011-11-16 | 国网电力科学研究院 | Excitation method of self-excited magnetic-valve controllable reactor and apparatus thereof |
| CN102867629A (en) * | 2012-09-29 | 2013-01-09 | 华北电力大学 | Device for increasing response speed of magnetically controlled reactor |
| CN105830182A (en) * | 2013-12-10 | 2016-08-03 | 西门子公司 | Device and method for reducing a magnetic unidirectional flux component in the core of a three-phase transformer |
| CN105830182B (en) * | 2013-12-10 | 2018-07-10 | 西门子公司 | For reducing the device and method of the unidirectional flux component in the iron core of three-phase transformer |
| US10297383B2 (en) | 2013-12-10 | 2019-05-21 | Siemens Aktiengesellschaft | Device and method for reducing a magnetic unidirectional flux component in the core of a three-phase transformer |
| CN104064323A (en) * | 2014-05-30 | 2014-09-24 | 安徽三和电力技术有限公司 | Magnetically controlled reactor for reactive compensation cabinet |
| CN107430932A (en) * | 2015-04-15 | 2017-12-01 | 三菱电机株式会社 | Internal combustion engine ignition coil |
| CN105590729A (en) * | 2015-12-28 | 2016-05-18 | 国网山东省电力公司枣庄供电公司 | Transformer with excitation reactance adjustable function |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20120307 Effective date of abandoning: 20130306 |
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