CN105206402A

CN105206402A - Novel on-load voltage regulation switch of transformer

Info

Publication number: CN105206402A
Application number: CN201510762428.4A
Authority: CN
Inventors: 刁俊起; 张磊; 李强; 王忠亮; 王秀; 张学凯
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-11-10
Filing date: 2015-11-10
Publication date: 2015-12-30

Abstract

The invention relates to a novel on-load voltage regulation switch of a transformer. The on-load voltage regulation switch comprises a selector switch circuit, wherein the selector switch circuit comprises singular numbers of tapping point switching circuits and odd numbers of tapping point switching circuits, which are symmetrically distributed, wherein the tapping point switching circuits comprise work contacts, transitional contacts and moving contacts which are in contact with the work contacts and the transitional contacts. The on-load voltage regulation switch is characterized in that the tapping point switching circuits comprise work contact control circuits and transitional contact control circuits drawn out from tapping points; the work contact control circuits are input end of a trigger transmitter, which is connected to the work contacts, and the output end of the trigger transmitter is connected with the transitional contact control circuits; the transitional contact control circuits are transitional resistors and are connected with the two ends of a series branch of an overcurrent protection device and a high-voltage thyristor. The on-load voltage regulation switch is simple in structure, low in price and high in reliability, can realize non-electric-arc work and double-state work in the switching process, and has broad application prospect and promotional value.

Description

A kind of novel transformer on-load voltage regulating switch

Technical field

The present invention relates to a kind of transformer regulation, be specifically related to a kind of novel transformer on-load voltage regulating switch.

Background technology

At present, drive the on-load voltage regulating switch majority of Load Regulation voltage to adopt form through current-limiting resistance bridging oil arc extinguishing fast in power transformer, because use oil blast large to oil pollution, maintenance workload is large, and thus reliability is affected.Easily cause contact burning, often upgrade, and need often to filter transformer oil.At present for overcoming the problems referred to above, there is the loaded switch with vacuum extinction, but reliability is not high, often cause switch to explode because vacuum bubbles lost efficacy, jeopardize transformer safety, interrelated data adopts controllable silicon, permutation and combination method is adopted to carry out on-load voltage regulation, but technology is more complicated, once controllable silicon fault, transformer cannot normally run.

Summary of the invention

For the problems referred to above, the invention provides a kind of switch omnidistance without electric arc and can the novel transformer on-load voltage regulating switch of bifurcation work.

For solving the problem, the technical scheme that the present invention takes is: a kind of novel transformer on-load voltage regulating switch, comprise switching switch circuit, described switching switch circuit comprises symmetrical odd number tap-change operation circuit and even numbers tap-change operation circuit, the moving contact that described tap-change operation circuit comprises working contact, transition contact and can contact with working contact, transition contact, described tap-change operation circuit comprises the working contact control circuit and transition contact control circuit of being drawn by tap; Described working contact control circuit is that working contact is connected to the input triggering transmitter, and the output triggering transmitter is connected to transition contact control circuit; Described transition contact control circuit is the series arm two ends that transition resistance is parallel to over-current protection device and high-pressure thyristor; Described triggering transmitter provides trigger current for high-pressure thyristor.

Described over-current protection device is the quick resistance of stream.

Described over-current protection device is fuse.

Structure of the present invention is simple, low price, and reliability is high, can realize switching omnidistance without electric arc work and can bifurcation work, have a wide range of applications and promotional value.

Accompanying drawing explanation

Fig. 1 is that embodiment 1 moving contact A contacts schematic diagram with working contact K1;

Fig. 2 is that embodiment 1 moving contact A contacts schematic diagram with working contact K1, transition contact k1;

Fig. 3 is that embodiment 1 moving contact A is separated with working contact K1 and contacts schematic diagram with transition contact k1;

Fig. 4 is that embodiment 1 moving contact A contacts schematic diagram with transition contact k1, transition contact k2;

Fig. 5 is that embodiment 1 moving contact A contacts schematic diagram with transition contact k2;

Fig. 6 is that embodiment 1 moving contact A contacts schematic diagram with transition contact k2, working contact K2;

Fig. 7 is that embodiment 1 moving contact A contacts schematic diagram with working contact K2;

K1, K2 are working contact, and k1, k2 are transition contact, and R1, R2 are transition resistance, and TSC1, TSC2 are that the first triggering transmitter, second triggers transmitter, and SK1, SK2 are the first high-pressure thyristor, the second high-pressure thyristor, and RF1, RF2 are the quick resistance of stream.

Embodiment

Embodiment 1

A kind of novel transformer on-load voltage regulating switch, comprise switching switch circuit, described switching switch circuit comprises symmetrical odd number tap-change operation circuit and even numbers tap-change operation circuit, described tap-change operation circuit comprises working contact K1, K2, transition contact and the moving contact A that can contact with working contact, transition contact, described tap-change operation circuit comprises the working contact control circuit and transition contact control circuit of being drawn by tap; Described working contact control circuit is that working contact K1, K2 are connected to the input triggering transmitter TSC1, TSC2, and the output triggering transmitter TSC1, TSC2 is connected to transition contact control circuit; Described transition contact control circuit is the series arm two ends that transition resistance R1, R2 are parallel to stream quick resistance RF1, RF2 and high-pressure thyristor SK1, SK2; Described first, second triggers transmitter TSC1, TSC2 for first, second high-pressure thyristor SK1, SK2 provides trigger current.

Process when being switched to working contact K2 by working contact K1 from moving contact A, operation principle of the present invention is as follows:

As shown in Figure 1, moving contact A contacts with working contact K1 normal condition, and first triggers transmitter TSC1 electric current, and second triggers transmitter TSC2 does not have electric current;

Start transition contact k1 to switch, when going to Fig. 2 position, moving contact A contacts with transition contact k1 with working contact K1, and second triggers transmitter TSC2 does not have electric current, and the first triggering transmitter TSC1, the first high-pressure thyristor SK1 have electric current;

When going to Fig. 3 position, moving contact A disconnects without arc with working contact K1 equipotential, the first high-pressure thyristor SK1 does not have electric current, moving contact A transition contact k1 contacts, and transition resistance R1 has electric current;

Start to switch to transition contact k2, when going to Fig. 4 position, moving contact A contacts with transition contact k2 with transition contact k1, first triggers transmitter TSC1, second triggers transmitter TSC2, the first high-pressure thyristor SK1, the second high-pressure thyristor SK2 no current, and transition resistance R1, transition resistance R2 have electric current;

When going to Fig. 5 position, moving contact A contacts with transition contact k2, and second triggers transmitter TSC2, the second high high-pressure thyristor SK2 no current, and transition resistance R2 has electric current;

Start to switch to working contact K2, when going to Fig. 6 position, moving contact A contacts with transition contact k2 with working contact K2, and the second triggering transmitter TSC2, the second high-pressure thyristor SK2 have electric current;

When going to Fig. 7 position, moving contact A contacts with working contact K2, and second triggers transmitter TSC2 electric current, and first triggers transmitter TSC1 does not have electric current.

When there is following fault, need not overhaul in time and also can ensure normal work,

When the first high-pressure thyristor SK1 opens a way, transition resistance R1 dominates work, working contact K1, K2 starting the arc arc extinguishing;

When the second high-pressure thyristor SK2 opens a way, transition resistance R2 dominates work, working contact K1, K2 starting the arc arc extinguishing;

When the first high-pressure thyristor SK1 short circuit conducting, flow quick resistance RF1 and disconnect at Fig. 4 position overcurrent, transition contact k1, k2 starting the arc arc extinguishing;

When the second high-pressure thyristor SK2 short circuit conducting, flow quick resistance RF2 and disconnect at Fig. 4 position overcurrent, transition contact k1, k2 starting the arc arc extinguishing.

Embodiment 2

Plant novel transformer on-load voltage regulating switch, described transition contact control circuit is the series arm two ends that transition resistance R1, R2 are parallel to fuse and high-pressure thyristor SK1, SK2, and other part-structures and operating principle all with embodiment 1, do not repeat them here.

Claims

1. a novel transformer on-load voltage regulating switch, comprise switching switch circuit, described switching switch circuit comprises symmetrical odd number tap-change operation circuit and even numbers tap-change operation circuit, the moving contact that described tap-change operation circuit comprises working contact, transition contact and can contact with working contact, transition contact, is characterized in that: described tap-change operation circuit comprises the working contact control circuit and transition contact control circuit of being drawn by tap; Described working contact control circuit is that working contact is connected to the input triggering transmitter, and the output triggering transmitter is connected to transition contact control circuit; Described transition contact control circuit is the series arm two ends that transition resistance is parallel to over-current protection device and high-pressure thyristor; Described triggering transmitter provides trigger current for high-pressure thyristor.

2. novel transformer on-load voltage regulating switch according to claim 1, is characterized in that: described over-current protection device is the quick resistance of stream.

3. novel transformer on-load voltage regulating switch according to claim 1, is characterized in that: described over-current protection device is fuse.