Synthetic loop test synchronous control system suitable for high-voltage breaker

Abstract

The invention discloses a synthetic loop test synchronous control system suitable for a high-voltage breaker. According to the system, a preset setting time is sent to a processing and controlling unit (20) through a test instruction generating unit (10), a signal conditioning unit (30) receives current signals collected by a magnetic potentiometer, and the processing and controlling unit (20) is used for integrating the preset setting time and the current signals and outputting time synchronization signals, wherein the time synchronization signals are used as instructions for driving a driving and executing unit (40) to drive a delaying arc loop and a voltage loop. According to the system, the magnetic potentiometer is used for collecting the current signals of a current loop, an ignition bulb is made to move according to the current signals and the preset setting time, and therefore it is guaranteed that the application time of the delaying arc loop and the voltage loop meets the requirements for test time synchronization.

Description

technical field [0001] 本发明涉及一种同步控制系统,更特别地说,是指一种对高压断路器进行合成回路试验的同步控制系统。 Background technique [0002] 在对高压断路器进行分断能力试验时,必须具有一套大容量的试验电源,为此人们一直在寻求一种以较少的投资和设备区进行所需试验的方法。合成试验回路以电压较低的电流源与电压较高的电压源联合运行的方式来试验高压大容量断路器,它能显著降低对试验设备容量的要求,等价性也得到公认。 [0003] 在合成试验中,开断电流和恢复电压是由两个电源分别提供的。所采用的并联电流引入合成回路,高压回路应在熄弧半波电流零点前的预定时刻投入,使原处于电流回路作用下的试品断路器无间歇地过渡到电压源之下。由于电流源的电压仅为断路器额定电压的几分之一,试品将比直接试验工况提前熄弧,为此几乎所有的合成试验均采取了延弧措施,以使断路器在低电压下的燃弧时间与额定电压使得燃弧时间相同。同步控制是影响合成试验成败的关键因素,其延弧回路及高压回路的准确投入,都是依靠同步控制来实现的。 [0004] see figure 1 所示的威尔合成回路原理图。HK为合闸开关,FD为辅助断路器,SP为试品断路器,LH为磁位计,GQ为电压回路点火球,YP为第一延弧回路点火球、YQ为第二延弧回路点火球。当HK、FD和SP闭合时,电流回路中的电流流过SP,同步控制单元通过磁位计LH采集电流信号以及试验程控仪发出的开锁信号,再按照预先整定的时间给GQ、YP和YQ发出点火信号,使得GQ、YP和YQ在预先整定的时间点上动作,从而使第一延弧回路、第二延弧回路和电压回路都按照设定的时间(即零点之前点火时刻)投入。对于合成试验在2005年8月第41卷第4期《高压电器》中公开了“合成试验的同步控制及其误差分析”,杨海芳著。 [0005] 传统的同步控制单元多采用模拟信号比较的方法来获得延弧回路及高压回路的点火信号,精度低,试验参数不直观,通用性不强,且可靠性较低、试验成功率低。 Contents of the invention [0006] 本发明的目的是提供一种新型高压断路器合成回路试验同步控制系统,该系统通过磁位计来采集电流信号,根据电流信号和预设的整定时间使点火球动作,从而保证延弧回路和电压回路投...

AI Technical Summary

Problems solved by technology

[0005] The traditional synchronous control unit mostly adopts the method of analog signal comparison to obtain the ignition signal of the arc extension circuit and the high voltage circuit, which has low precision, unintuitive test parameters, poor versatility, low reliability and low test success rate

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