基于电场逆问题的双差分式D-dot过电压传感器研究
Research on Dual-differential D-dot Overvoltage Sensor Based on the Inverse Problem of Electric Field
-
摘要: 通过测量电场获取电力系统遭受的过电压,对于电力系统故障分析、绝缘配合设计以及过电压的特性研究具有指导作用。为此,该文设计一种双差分式D-dot过电压传感器,以实现对过电压信号快速精确地测量。首先,介绍该传感器的基本测量原理;其次,通过仿真对传感器进行仿真论证和参数优化设计;最后,根据仿真结果制作传感器实物,并搭建试验平台对设计的传感器进行稳态性能和暂态性能试验。结果表明:双差分式D-dot过电压传感器具有良好的稳态和暂态特性,相位和幅值误差小,测得的雷电波上升时间的相对误差在±1.65%以内,对雷电波峰值的测量相对误差小于±1.85%。Abstract: Obtaining the overvoltage of the power system by measuring the electric field has important guiding significance for power system malfunction analysis, insulation coordination design and overvoltage characteristics study. Therefore, in order to achieve faster and more accurate measurement of overvoltage signals, we designed a dualdifferential D-dot overvoltage sensor. First of all, the basic measurement principle of the sensor was introduced. Secondly, we conducted feasibility study and parameter optimization design for the sensor by simulation. Finally, according to the simulation results, the physical model of the sensor was made and the test platform was built to test the steady state performance and transient performance of the designed sensor. The results show that the dual-differential D-dot overvoltage sensor has good steady-state and transient characteristics with small phase and amplitude errors. The relative error of the lightning wave rise time measured by the sensor is within ±1.65%, and the relative error of the measured lightning wave peak is less than ±1.85%.
下载:
