CN202150705U

CN202150705U - Thyristor voltage adjusting transformer station automatic reactive compensation device for adjusting reactive capacity

Info

Publication number: CN202150705U
Application number: CN201120278546U
Authority: CN
Inventors: 金黎; 王恒; 魏圣刚; 刘坤; 张晓军; 刘晓军
Original assignee: XI'AN SENBAO ELECTRIC ENGINEERING (SBEC) Co Ltd
Current assignee: XI'AN SENBAO ELECTRIC ENGINEERING (SBEC) Co Ltd
Priority date: 2011-08-02
Filing date: 2011-08-02
Publication date: 2012-02-22
Anticipated expiration: 2021-08-02

Abstract

The utility model discloses a thyristor voltage adjusting transformer station automatic reactive compensation device for adjusting a reactive capacity, comprising a current transformer, a voltage transformer, a fixed compensation and filter circuit composed of a reactor and a capacitor and a circuit breaker which are connected on a high voltage bus, and also comprising a controller. A TVR voltage regulator and a fixed capacitor are connected and then paraellelly connected on the high voltage bus through the circuit breaker, and the fixed compensation and filter circuit is parallelly connected on the high voltage bus; and the current transformer and the voltage transformer are both connected with the controller through a secondary signal line, and the controller is also connected with the circuit breaker and the TVR voltage regulator. Voltage and current signals of the high voltage bus acquired by the voltage transformer and the current transformer enter into the controller, the controller obtains a needed reactive capacity of a system through calculating, and controls the TVR voltage regulator to rapidly boost or reduce the end voltage of a capacitor set according to the reactive capacity, and a reactive capacity output by the fixed capacitor is adjusted, thus reaching the aim of rapid reactive compensation.

Description

Thyristor voltage regulation type is transferred idle transformer station reactive power automatic compensation device

Technical field

The utility model relates to a kind of transformer station reactive power compensator, and particularly a kind of thyristor voltage regulation type that comes to change reactive compensation capacity fast through TVR voltage regulator adjustment capacitor terminal voltage is transferred idle transformer station reactive power automatic compensation device.

Background technology

Domestic present transformer station's reactive-load compensation equipment adopts the manual mode switched capacitor usually, generally be that one section bus is thrown one group or two group capacitors, and capacitor volume is all bigger.When the compensation capacity of capacitor during greater than the no-power vacancy of transformer station, drop into capacitor and benefit will occur, can not owe to mend and do not throw.Though part transformer station has adopted automatics to come switched capacitor, be used for the switch of switching, vacuum circuit-breaker normally, its shortcoming is to be inappropriate for frequent operation.If carry out the meticulous compensation of multichannel, its equipment volume is huge, and cost is high.Equally, this device can not fundamentally solve the problem that compensation progression difference is big, precision is low, operational percentage is low, does not therefore still reach the requirement of meticulous reactive power compensation.Some producer transformed original mode afterwards, added automatic control link, through detection system voltage and idle big or small automatic switching capacitor.But this mode has just solved the not nimble problem of control, and still can not to solve group capacity big, and grouping number is few, the switching problem such as big of shoving, and when system lacks after a little while idlely, capacitor still can't put into operation.

In recent years, domestic transformer station begins to adopt mechanical Loading voltage regulator regulating capacitor terminal voltage to carry out reactive power compensation, and this compensation arrangement is can dynamic compensation idle, and compensation progression is many, reaches meticulous compensation, and it is little not have the inrush phenomenon of impact.But because it is through mechanical on load tap changer regulation voltage, reactive power compensation speed is slower, and shunting switch is prone to fault, can not frequent movement, the periodic filtering transformer oil.

Summary of the invention

Defective or deficiency to above-mentioned prior art existence; The purpose of the utility model is; Provide a kind of thyristor voltage regulation type to transfer idle transformer station reactive power automatic compensation device, this device can be realized the reactive power compensation of 35kV, 10kV, three electric pressures of 6kV.

In order to realize above-mentioned task, the utility model is taked following technical solution:

A kind of thyristor voltage regulation type is transferred idle transformer station reactive power automatic compensation device; Comprise current transformer, voltage transformer, circuit breaker that is connected on the high voltage bus and fixed compensation and the filter circuit of forming by reactor and electric capacity; It is characterized in that; Also include a controller, the TVR voltage regulator connects the back and is connected in parallel on the high voltage bus through circuit breaker with the fixed capacitor group, and fixed compensation and filter circuit are connected in parallel on the high voltage bus; Current transformer all links to each other with controller through the secondary singal line with voltage transformer, and controller also links to each other with circuit breaker and TVR voltage regulator.

Other characteristics of the utility model are:

The pressure regulating device of described TVR voltage regulator is thyristor loaded tap-off system or other power electronics loaded tap-off system.

Described controller includes digital signal processor DSP, signal input module, keyboard input module, LCD display, control signal output module and RS232 communication interface module at least; Wherein, The RS232 communication interface module connects wired communication module and wireless communication module, is connected with the power signal output module on the control signal output module.

Described TVR voltage regulator, fixed capacitor group, fixed compensation and filter circuit, current transformer, voltage transformer connect as one.

Described circuit breaker adopts conventional circuit breaker or vacuum contactor to add conventional fuse.

The thyristor voltage regulation type of the utility model is transferred idle transformer station reactive power automatic compensation device, and the technique effect that brings is:

1, idle governing speed is fast.Because through TVR voltage regulator regulating capacitor terminal voltage, idle being adjusted in the 100ms accomplished, and can multipole accent idle.

2, frequently regulating system is idle.Because the electronics loaded tap-off system that adopted of TVR voltage regulator is contactless, not arcing, thereby can frequent movement, the life-span is long, non-maintaining, reliability is high.

3, the reactor of series connection suitable capacity in the capacitor fixed compensation circuit; Not only limited the inrush phenomenon of capacitor; And can suppress or filtering harmonic; Avoid or reduced that the possibility that harmonic current amplifies takes place the access owing to compensation condenser on the high-tension line, thereby avoid or reduced the harm of harmonic wave electrical network and equipment.Automatic voltage regulator+fixed capacitor group can not break away from electrical network and under the condition of not cutting off the power supply, realize meticulous tracking reactive power compensation, and its installation is simple, easy to maintenance; Have communication interface, automaticity is high, and no-flashy-flow, does not have and impact; Operate steadily reliable operation.

Description of drawings

The key wiring diagram of Fig. 1 the utility model;

The controller block diagram of Fig. 2 the utility model;

The signal conditioning circuit figure of signal input module in Fig. 3 controller;

Fig. 4-1, Fig. 4-the 2nd, the signal input module of controller switching value input circuit wherein;

Fig. 5-1, Fig. 5-the 2nd, the switching value output circuit of the control signal output module of controller;

Below in conjunction with accompanying drawing and embodiment the utility model is done further to specify.

Embodiment

Referring to Fig. 1; Present embodiment provides a kind of thyristor voltage regulation type and transfers idle transformer station reactive power automatic compensation device; Comprise current transformer 1, voltage transformer 2, circuit breaker 4 that is connected on the high voltage bus and fixed compensation and the filter circuit of forming by reactor L and capacitor C 7; Also include a controller 3, TVR voltage regulator 5 connects the back and is connected in parallel on the high voltage bus through circuit breaker 4 with fixed capacitor group 6, and fixed compensation and filter circuit 7 are connected in parallel on the high voltage bus; Current transformer 1 all links to each other with controller 3 through the secondary singal line with voltage transformer 2, and controller 3 also links to each other with circuit breaker 4 and TVR voltage regulator 5.

In the present embodiment, the pressure regulating device of TVR voltage regulator 5 is thyristor loaded tap-off system or other power electronics loaded tap-off system.

TVR voltage regulator 5, fixed capacitor group 6, fixed compensation and filter circuit 7, current transformer 1, voltage transformer 2 connect as one.

Referring to Fig. 2; The controller 3 of present embodiment includes digital signal processor DSP, signal input module, keyboard input module, LCD display, control signal output module and RS232 communication interface module at least; Wherein, The RS232 communication interface module connects wired communication module and wireless communication module, both can be used for directly and the external equipment communication, also can carry out wireless telecommunications by external wireless communication module.Be connected with the power signal output module on the control signal output module.

Circuit breaker 4 adopts conventional circuit breaker or vacuum contactor to add conventional fuse.

Voltage transformer 2 on the high voltage bus, the secondary side signal of current transformer 1 get into the signal input module in the controller 3; Utilize voltage and current on 1 pair of high voltage bus of voltage transformer 2 summation current transformers to gather and the signal of gathering is sent into controller 3; Digital signal processor DSP carries out analytical calculation to the signal of gathering; Confirm the required reactive power of system, TVR voltage regulator 5 is according to the terminal voltage of required reactive power quick adjustment capacitor group 6, thus the reactive power of meticulous regulating system; Realize following the tracks of fast compensation, to satisfy the required reactive power of system.

The signal conditioning circuit of signal input module is referring to Fig. 3 in the controller 3, and signal input module switching value input circuit wherein is referring to Fig. 4-1 and Fig. 4-2 in the controller 3; The switching value output circuit of control signal output module is referring to Fig. 5-1 and Fig. 5-2 in the controller 3.

In sum, the thyristor voltage regulation type of the utility model is transferred idle transformer station reactive power automatic compensation device, adopts thyristor loaded tap-off system to change capacitance terminal voltage and comes the quick adjustment system idle; Compare with traditional reactive power compensator, this device is compensating reactive power rapidly, not limited by action frequency; No-flashy-flow; Non-maintaining, meticulous adjusting reactive power, so the application of the utility model has important practical usage to transformer station's reactive power compensation.

Claims

1. a thyristor voltage regulation type is transferred idle transformer station reactive power automatic compensation device; Comprise current transformer (1), voltage transformer (2), circuit breaker (4) that is connected on the high voltage bus and fixed compensation and the filter circuit of forming by reactor (L) and electric capacity (C) (7); It is characterized in that; Also include a controller (3); TVR voltage regulator (5) connects the back and is connected in parallel on the high voltage bus through circuit breaker (4) with fixed capacitor group (6), fixed compensation and filter circuit (7) are connected in parallel on the high voltage bus; Current transformer (1) all links to each other with controller (3) through the secondary singal line with voltage transformer (2), and controller (3) also links to each other with circuit breaker (4) and TVR voltage regulator (5).

2. thyristor voltage regulation type as claimed in claim 1 is transferred idle transformer station reactive power automatic compensation device, it is characterized in that, the pressure regulating device of described TVR voltage regulator (5) is thyristor loaded tap-off system or power electronics loaded tap-off system.

3. thyristor voltage regulation type as claimed in claim 1 is transferred idle transformer station reactive power automatic compensation device; It is characterized in that; Described controller (3) includes digital signal processor DSP, signal input module, keyboard input module, LCD display, control signal output module and RS232 communication interface module at least; Wherein, the RS232 communication interface module connects wired communication module and wireless communication module, is connected with power amplifier module on the control signal output module.

4. thyristor voltage regulation type as claimed in claim 1 is transferred idle transformer station reactive power automatic compensation device; It is characterized in that described TVR voltage regulator (5), fixed capacitor group (6), fixed compensation and filter circuit (7), current transformer (1), voltage transformer (2) connect as one.

5. thyristor voltage regulation type as claimed in claim 1 is transferred idle transformer station reactive power automatic compensation device, it is characterized in that, described circuit breaker (4) adopts vacuum contactor to add fuse.