基于注入信号的消弧线圈电容检测方法  

Measurement System of Auto-Tuning ARC Based on Injecting Current Signal

作　　者：熊娅俐[1] 陈乔夫[1] 盛建科[1] 王恩维[1] 张宇[1] 

机构地区：[1]华中科技大学电气与电子工程学院,武汉430074

出　　处：《高电压技术》2005年第3期36-38,共3页High Voltage Engineering

摘　　要：为利于消弧线圈自动调谐,提出了一种电力系统电容电流检测方法,即向消弧线圈二次侧线圈注入变频小电流,寻找系统对地电容与消弧线圈励磁电抗的谐振频率,可直接计算出系统对地电容值。此法用于磁通补偿消弧线圈时,不增加系统硬件成本,并可直接得到调节消弧线圈电抗值所需的重要参数—电流补偿系数α。A new method to measure capacitive current of power network based on injecting various frequency currents is presented. It can get all required parameters to compensate capacitive current by injecting a various frequency currents to the secondary coils of the reactor and then search the resonance frequency of the capacitance and the excitation impedance of the reactor. When this method is applied to the ARC based on magnetic flux compensation, it do not need the additional hardware and can get the parameter α directly, which is important for adjust the impedance of the reactor.

关 键 词：消弧线圈 注入信号 电容检测 DSP 

分 类 号：TM475[电气工程—电器]