基于HHT的高压电气主设备短路故障监测系统设计

Design of Short Circuit Fault Monitoring System for High Voltage Electrical Main Equipment Based on HHT

传统的短路故障监测系统存在故障自动控制器调压绕组负荷较小的情况,导致系统提取的故障特征差值较低。该设计基于HHT的高压电气主设备短路故障监测系统,通过改良高压电气主设备传输电路、设计短路故障自动控制器,完成高压电气主设备短路故障监测系统硬件设计。利用设定基于HHT的短路故障在线监测程序、计算短路故障电流,完成对高压电气主设备短路故障监测系统软件部分设计。实验结果表明:与传统系统相比,该系统在进行高压电气主设备短路故障仿真测试时,故障特征向量间距最大差值高达1.0,且系统能够在电信号分析方面有效帮助降低故障分类程序的运算量,帮助大幅提升高压电气主设备短路故障监测系统的各项性能。

The traditional short-circuit fault monitoring system has the situation that the load of voltage regulating winding of fault automatic controller is small,which leads to the low difference of fault features extracted by the system.The short-circuit fault monitoring system of high-voltage electrical main equipment based on HHT was designed.By improving the transmission circuit of high-voltage electrical main equipment and designing the short-circuit fault automatic controller,the hardware design of high-voltage electrical main equipment short-circuit fault monitoring system was completed.By setting the HHT based short-circuit fault online monitoring program and calculating the short-circuit fault current,the software part of the short-circuit fault monitoring system for high-voltage electrical main equipment was designed.The experimental results show that:compared with the traditional system,the maximum difference of fault feature vector spacing is as high as 1.0 in the simulation test of high-voltage electrical main equipment short-circuit fault,and the system can effectively help reduce the calculation of fault classification program in the aspect of electrical signal analysis,improve the performance of high voltage electrical main equipment short circuit fault monitoring system.