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. WANG YU,HE YU FENG,MO CHANG FENG.Design of power supply based on LC resonance and zero sequence voltage measurement system[J].Electrical Measurement & Instrumentation,2018,55(11):78-82.
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
In order to solve the problem of power supply for intelligent integrated high voltage switchgear, the method based on LC resonance is proposed, 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. The experimental data demonstrate the effectiveness of the circuit. Finally, the zero-sequence voltage measurement is realized by constructing the neutral current loop, which provides the technical condition for the single-phase ground fault detection of the intelligent switch.
