CN205829469U - A kind of automatic voltage regulation and the transformator of dynamic passive compensation - Google Patents

Abstract

This utility model relates to electric power project engineering field, particularly relates to the transformator of a kind of automatic voltage regulation and dynamic passive compensation.The Secondary Winding of this utility model the first single-phase transformer and the secondary windings in series of the second single-phase transformer are connected between two power output ends；First phase power input, the second phase power input, third phase power input are winding of multiple access, and the point that wherein number of turns is most is voltage coil number when normally working；Dynamic reactive compensation circuit of the present utility model includes that the N road catalyst group connecting Capacitor banks and thyristor groups group are constituted, and each road catalyst group is respectively by selecting catalyst and execution catalyst to form；All selection catalyst inputs link together and constitute switching bus.It is simple that this utility model has voltage commutation circuit, and in boosting or pressure reduction, voltage output is stable, and automatic voltage regulation and dynamic reactive compensation circuit each work alone, and are independent of each other, it is ensured that the normal work of whole circuit.

Description

A kind of automatic voltage regulation and the transformator of dynamic passive compensation

Technical field

This utility model relates to electric power project engineering field, particularly relates to a kind of automatic voltage regulation and dynamic passive compensation Transformator.

Background technology

At present, when needs change power transformer low pressure winding voltage, owing to power transformer capacity is relatively big, if low Pressure winding voltage is relatively low, when using pressure adjusting structure that low voltage voltage is adjusted, and the standard that is often not being met or user's deviation The tapping voltage required；Secondly, existing automatic Regulation equipment, often increase coil windings at secondary side, in order to improve defeated Go out voltage, but so improve output voltage, generally require and increase isolation circuit when the short time cuts off output circuit or switching, To guarantee that not havinging big electric current in handoff procedure burns circuit；Single-phase transformer is turned, when it is applied simultaneously for three-phase voltage When in electric welding field or using in rural area, easily there is fluctuation row in the idle factor of its load end (the 220V alternating current i.e. exported) Change, preferably increases dynamic reactive compensation circuit, carries out reactive-load compensation.

Utility model content

For the deficiencies in the prior art, this utility model provides a kind of automatic voltage regulation transformator.This utility model first The Secondary Winding of single-phase transformer and the secondary windings in series of the second single-phase transformer are connected between two power output ends；The One phase power input, the second phase power input, third phase power input are winding, wherein a number of turns of multiple access Most points is voltage coil number when normally working；Dynamic reactive compensation circuit of the present utility model includes connecting Capacitor banks N road catalyst group and thyristor groups group constitute, each road catalyst group respectively by select catalyst and perform catalyst group Become；All selection catalyst inputs link together and constitute switching bus.It is simple that this utility model has voltage commutation circuit, In boosting or pressure reduction, voltage output is stable, and automatic voltage regulation and dynamic reactive compensation circuit each work alone, the most not shadow Ring, it is ensured that the normal work of whole circuit.

The technical solution of the utility model is: a kind of automatic voltage regulation and the transformator of dynamic passive compensation, including three Power input, two power output ends and dynamic reactive compensation circuit, three power inputs input respectively two single-phase Transformator, wherein, a terminal of first winding of single-phase transformer and the first phase power input are connected, another end Son is connected with the midpoint of second winding of single-phase transformer, and two terminals of second winding of single-phase transformer are respectively with the Two-phase power input is connected with third phase power input, it is characterised in that: the Secondary Winding of the first single-phase transformer and the The secondary windings in series of two single-phase transformers is connected between two power output ends；Described the first phase power input, Two-phase power input, third phase power input be multiple access winding, the point that wherein number of turns is most be voltage just Often coil number during work；Described dynamic reactive compensation circuit includes N road catalyst group and the crystalline substance lock connecting Capacitor banks Pipe group group is constituted, and each road catalyst group is respectively by selecting catalyst and execution catalyst to form；All selection catalysts input End link together composition switching bus, select the catalyst other end be connected with electric capacity input, perform catalyst one end and Live wire is connected, and the other end is connected with electric capacity input；Electric capacity input contacts with selection and performs catalyst and is connected, outfan Being connected with zero line, thyristor groups one end is connected with live wire, and the other end is connected with switching bus.

According to automatic voltage regulation as above and the transformator of dynamic passive compensation, it is characterised in that: described brilliant lock Guan Zuwei two, and two thyristor groups parallel connections.

According to automatic voltage regulation as above and the transformator of dynamic passive compensation, it is characterised in that: described first Phase power input, the second phase power input, third phase power input access a winding by switch, every the most logical Crossing 2 switches and access a winding, the coil turn of each access point is inconsistent.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model；

Fig. 2 is the structural representation (thyristor groups is single group) of another embodiment of this utility model.

Description of reference numerals: A, B, C are respectively the triple line of input voltage, K1 to K6 is switching switch, and VT1, VT2 are brilliant Brake tube group；A, b, c, d are low-pressure side output voltage point, KJ1 to KJ4 be catalyst, C1 and C2 be electric capacity.

Detailed description of the invention

Below in conjunction with accompanying drawing, the technical solution of the utility model is described further.

The automatic voltage regulation transformator provided such as Fig. 1 this utility model, the outside terminal of this automatic voltage regulation transformator includes three Individual power input (A, B and C) and two power output ends (a and b), three power inputs are respectively the first phase power supply input End A, the second phase power input B and third phase power input C；This utility model includes the first single-phase transformer (ADad institute Corresponding transformator) and the second single-phase transformer (transformator corresponding to BCbc), wherein, the first single-phase transformer once around One terminal of group and the first phase power input A are connected, another terminal and the midpoint D of second winding of single-phase transformer Being connected, two terminals of second winding of single-phase transformer input with the second phase power input B and third phase power supply respectively End C is connected, thus the first single-phase transformer winding is formed as the first phase winding AD (i.e. A phase winding), the second single-phase change Winding of depressor is formed as the second phase winding BD (i.e. B phase winding) and third phase winding CD (i.e. C phase winding).

As it is shown in figure 1, the Secondary Winding of the first single-phase transformer of the present utility model and the secondary of the second single-phase transformer Windings in series (being connected in series c, the d a little seeing in Fig. 1 to connect) is connected between two power output ends a, b, in this utility model, A point connecting to neutral line, b starts to exchange fire line；This utility model uses on the second single-phase transformer strengthen the second phase winding BD and third phase around The group CD connected mode from the degree of coupling.

Such as Fig. 1, in order to make this utility model can adapt to different voltage, this utility model the first phase power input A, Second phase power input B, third phase power input C are winding of multiple access, and the point that wherein number of turns is most is electricity Coil number when positive pressure often works, the coil number after switching when the less point of the number of turns is low pressure.

As it is shown in figure 1, be respectively the first phase power input A, the second phase power input during switch K1, K3, K5 Guan Bi B, third phase power input C normal coil input point；Switch K2, K4, K6 Guan Bi time be respectively the first phase power input A, Second phase power input B, third phase power input C a few coils input point.

This utility model also includes voltage check device, and voltage checks that device checks respectively for A, B, C phase voltage, by checking The change of voltage, is controlled the Guan Bi of K1 to K6 respectively by control system.

Voltage stabilizing work process of the present utility model is: voltage check device detection three-phase voltage, as found the first phase power supply Input A is too low, then control system first closes switch K2, then disconnects K1, i.e. can improve the output voltage between ab, as Other biphase input voltages are normal, then other two phase voltages input points can not change；When the first phase power input A voltage is extensive Time the most normal, then can first close switch K1, then disconnect K2.

This utility model also includes the dynamic reactive compensation circuit that transformator exports, and connects including the N road connecting Capacitor banks Tentaculum group (in accompanying drawing 1, know and give two-way catalyst group, but in real work, can increase multichannel according to demand) and two are also The thyristor groups of connection is constituted, and each road catalyst group is respectively by selecting catalyst (KJ1, KJ3) and performing catalyst (KJ2, KJ4) Composition, as shown in Figure 1.

This utility model uses thyristor groups (VT1, VT2) switching, uses catalyst group to have the low on-resistance side of contact Formula is run.Sharing two switching loops by N road cut-in and cut-off contactor group and realize capacitor switching, wherein N is more than or equal to 2.Share Two thyristor groups participate in switching operation in turn.System according to required compensating reactive power capacity determine put into electric capacity number, control Corresponding switching loop and switch.Each thyristor groups all puts into when both end voltage zero passage own, cuts when capacitance current zero passage Remove.Whole switching process can be divided into the first via to put into the stage, the second tunnel puts into the stage and first via excision stage, the second tunnel excision Stage.The first via puts into excision operation and is completely independent with the second tunnel input excision operation, the most unaffected, carries out switching in turn Operation.

The number designations such as following catalyst KJ1, KJ3 are that odd number represents the 1st tunnel, all of selection in the 2nd road to N road contacts Device；The number designations such as catalyst KJ2, KJ4 are that even number represents the 1st tunnel, the 2nd all of execution in road to N road catalyst, system root According to required compensating reactive power capacity determine put into electric capacity number, control corresponding switching loop and switch.Such as, if desired for input First three road electric capacity, then first three road selects catalyst to perform identical action in circuit, and the selection catalyst on other roads is not held OK.Select catalyst and execution catalyst to be the most all carried out identical action, but be not that switching action is each simultaneously Only put into or excision one tunnel, say, that first three road electric capacity puts into and needs to perform three same input action (two IGCTs Group uses in turn), N road electric capacity puts into be needed to perform n times input action, and this is the way that those skilled in the art follow, it is therefore an objective to In order to ensure the smooth of input process rather than the whole inputs rushed forward by required electric capacity or excision.

As it is shown in figure 1, all selection catalyst inputs of the present utility model link together, composition switching bus, selects The catalyst other end is connected with electric capacity input, performs catalyst one end and is connected with live wire, the other end and electric capacity input phase Connect.Electric capacity input contacts with selection and performs catalyst and is connected, and outfan is connected with zero line.

As it is shown in figure 1, this utility model is connected to after two-way thyristor groups parallel connection between live wire and switching bus, wherein Each road cut-in and cut-off contactor includes selecting catalyst (KJ1, KJ3) and performing catalyst (KJ2, KJ4), selects catalyst KJ1's The outfan of input and two parallel thyristors groups is connected；Perform the input of catalyst KJ2 with bidirectional thyristor group even The phase line connect is connected.(with reference to Figure of description, being arranged above input, lower section is outfan, equally, and each catalyst, brilliant lock Pipe group, one end, top of electric capacity are input, and one end, lower section is outfan.In this article, input and outfan not electricity Substantive significance on road, is intended merely to narration convenient).

It is specific as follows that the first via puts into phase process: system controls to select catalyst KJ1 to put into and anti-in the suitable moment Feedback status signal, thyristor groups VT1 put into and feedback states signal in the voltage zero-cross moment, performs catalyst KJ2 and puts into and anti- Feedback status signal, now electric current is run branch road by the change of current of switching loop to conducting, turns off brilliant lock successively at capacitance current zero crossing Pipe group VT1 and selection catalyst KJ1, and feedback states signal, complete the first via and put into the stage.

The first via excision phase process specific as follows: now, the compensation electric capacity of certain branch road by conducting run branch road and Performing catalyst KJ2 and hang in electrical network, select catalyst KJ1 to put into and feedback states signal control, thyristor groups VT1 is at electricity Pressure zero-acrross ing moment puts into and feedback states signal, after switching branch road has controlled, controls disconnection and performs catalyst KJ2 and feed back Status signal, excises thyristor groups VT1 successively and selects catalyst KJ1 and feed back, and completes first via excision process.

It is specific as follows that second tunnel puts into phase process: system controls to select catalyst KJ1 to put into and anti-in the suitable moment Feedback status signal, thyristor groups VT2 put into and feedback states signal in the voltage zero-cross moment, performs catalyst KJ2 and puts into and anti- Feedback status signal, now electric current is run branch road by the change of current of switching loop to conducting, turns off brilliant lock successively at capacitance current zero crossing Pipe group VT2 and selection catalyst KJ1, and feedback states signal, complete the second tunnel and put into the stage.

Second tunnel excision phase process specific as follows: now, the compensation electric capacity of certain branch road by conducting run branch road and Performing catalyst KJ2 and hang in electrical network, select catalyst KJ1 to put into and feedback states signal control, thyristor groups VT2 is at electricity Pressure zero-acrross ing moment puts into and feedback states signal, after switching branch road has controlled, controls disconnection and performs catalyst KJ2 and feed back Status signal, excises thyristor groups VT2 successively and selects catalyst KJ1 and feed back, and completes the second tunnel excision process.

As in figure 2 it is shown, thyristor groups of the present utility model can also only arrange a road, as arranged a road, then switch a road After, needing to wait for a period of time is switching an other road, is switching, so to avoid thyristor groups frequent after often waiting 1 second Switching, make IGCT damage；Certainly, thyristor groups can also arrange many groups, such as 3 groups, so can reduce brilliant lock further The use frequency of pipe group.

The utility model has the advantages that: one is can be adjusted the three-phase voltage of input respectively, and in input end-grain cutting During emat coil, two switching points can be made the most short-circuit, without affecting power supply input, as at outfan switching coil, then needed Avoid the situation of short circuit during switching, so circuit of the present utility model is more succinct；Two is that this utility model three-phase is straight Connect and become single-phase, even if in the case of three-phase input voltage all reduces, by the boosting measure of three-phase, it can be ensured that the most defeated Go out stablizing of voltage；Three is that its each boosting scope can suitably control less, then at input voltage owing to using three-phase voltage From less to recover normal during, the output voltage amplitude of variation between ad is less, uses impact less electric equipment； Four is that in this utility model, automatic voltage regulation and dynamic reactive compensation circuit each work alone, and is independent of each other, it is ensured that whole line The normal work on road.

Claims (3)

1. automatic voltage regulation and a transformator for dynamic passive compensation, including three power inputs, two power output ends And dynamic reactive compensation circuit, three power inputs input two single-phase transformers, wherein, the first single-phase transformation respectively One terminal of winding of device and the first phase power input are connected, another terminal and winding of the second single-phase transformer Midpoint be connected, two terminals of second winding of single-phase transformer respectively with the second phase power input and third phase power supply Input is connected, it is characterised in that: the Secondary Winding of the first single-phase transformer and the secondary windings in series of the second single-phase transformer It is connected between two power output ends；Described the first phase power input, the second phase power input, third phase power supply are defeated Entering end and access a winding for multiple, the point that wherein number of turns is most is voltage coil number when normally working；Described is dynamic Reactive power compensation circuit includes that the N road catalyst group connecting Capacitor banks and thyristor groups group are constituted, each road catalyst component Not by selecting catalyst and execution catalyst to form；All selection catalyst inputs link together and constitute switching bus, choosing Select the catalyst other end to be connected with electric capacity input, perform catalyst one end and be connected with live wire, the other end and electric capacity input It is connected；Electric capacity input contacts with selection and performs catalyst and is connected, and outfan is connected with zero line, thyristor groups one end and fire Line is connected, and the other end is connected with switching bus, and wherein N is more than or equal to 2.

Automatic voltage regulation the most according to claim 1 and the transformator of dynamic passive compensation, it is characterised in that: described crystalline substance Brake tube group is two, and two thyristor groups parallel connections.

Automatic voltage regulation the most according to claim 1 and the transformator of dynamic passive compensation, it is characterised in that: described One phase power input, the second phase power input, third phase power input access a winding by switch, and every phase is the most at least Accessing a winding by 2 switches, the coil turn of each access point is inconsistent.