电测与仪表2018，Vol.55Issue(11)：78-82,93,6.
基于LC谐振取电及零序电压测量系统的设计
Design of power supply based on LC resonance and zero sequence voltage measurement system
摘要
Abstract
In order to solve the problem of power supply for intelligent integrated high voltage switchgear,the method of LC resonance power supply system based on capacitance voltage divider principle is proposed in this paper,and the hardware module has been designed:the supply power circuit contains high-voltage capacitors,isolation transformer winding in series,transformer secondary winding parallel voltage divider and series matching inductors to achieve regulated output.A protection circuit based on energy pool voltage monitoring and power electronic switch control is designed for over-voltage and lightning impulse of line fault.Finally,the zero-sequence voltage measurement is realized by constructing the neutral current loop,without installing three-phase five-column PT or zero-sequence voltage sensor,and the cost of project is reduced,which provides the technical condition for the single-phase ground fault detection of the intelligent switch.The experimental data demonstrates the power taking of system can reach 1 watt,and the accuracy of zero sequence voltage measurement is 5％,which has great value in engineering application.关键词
LC谐振/高压开关/电压监测/零序电压/单相接地故障Key words
LC resonance/high voltage switchgear/voltage-monitoring/zero-sequence voltage/single-phase grounding fault分类
信息技术与安全科学引用本文复制引用
王毓,贺煜峰,莫昌锋..基于LC谐振取电及零序电压测量系统的设计[J].电测与仪表,2018,55(11):78-82,93,6.
