相控断路器分闸相角检测研究  

Research on Detection of Opening Phase Angle of Phase Control Circuit Breaker

作　　者：韩冰 李继岚 王宇坤 蔡雄友[1] 

机构地区：[1]江门职业技术学院,广东江门529000

出　　处：《工业控制计算机》2022年第1期158-160,共3页Industrial Control Computer

基　　金：江门市科技局基础与理论科学研究:智能断路器过零点检测算法研究(2020030101200005373)。

摘　　要：针对南方电网某供电局10kV无功补偿电容器故障率较高的问题,拟在南方电网某110kV变电站采用分相投切电容器组,抑制合闸涌流和减小分闸重燃概率。分相分合闸技术的实现需要较高的相位检测精度。根据南方电网某110kV变电站运行数据,在MATLAB中建立仿真模型。采集变压器二次侧10kV处电压信号时长为1s,通过相关分析(扫频和扫相位得到极大值)计算被测信号频率和初相,通过代数运算可以准确地计算出分闸时刻的相角。实验结果表明该算法得到频率不存在误差,相位检测误差小于0.076弧度,该精度能够满足相控断路器实际工作需求。In view of the high failure rate of 10 KV reactive power compensation capacitors in a power supply bureau of China Southern Power Grid,it is proposed to use split-phase switching capacitor banks in a 110 kV substation of China Southern Power Grid to suppress closing inrush current and reduce the probability of opening reignition.The realization of split-phase split-closing technology requires high phase detection accuracy.Based on the operating data of a 110 kV substation of China Southern Power Grid,a simulation model is established in MATLAB.The voltage signal at 10 kV on the secondary side of the transformer is always 1 s,and the frequency and initial phase of the measured signal are calculated through correlation analysis(the maximum value is obtained by sweeping frequency and sweeping phase),and the phase angle at the opening time can be accurately calculated through algebraic calculation.Experimental results show that there is no error in the frequency obtained by the algorithm,and the phase detection error is less than 0.076 radians.This accuracy can meet the actual working requirements of phase-controlled circuit breakers.

关 键 词：相控断路器 分闸时刻 频率检测 无功补偿电容器 过零检测 仿真分析 

分 类 号：TM561[电气工程—电器]