数学形态学滤波器在行波保护中的应用研究

针对现有高压直流主保护行波保护如何准确、快速提取故障暂态值的问题,利用数学形态学的优点设计基于数学形态学的数字滤波器,提出了一种新的多尺度数学形态学滤波器能够很好的滤除直流线路上行波信号中的主要噪声。仿真结果表明,能够满足行波保护对干扰信号和故障信号的准确区分,为故障的准确判断和精确定位奠定了基础。

Application of Mathematical Morphology Filter on Traveling Wave Protection

In view of getting the fault transient value of HVDC power transmission accurately and quickly, it designs the filter based on mathematical morphology. Then it brings forward that new filter for two kinds traveling wave protection schemes. The filter can perfectly filter the disturbing noise in the HVDC traveling wave. Simulation result shows that this filter has remarkable performance to distinguish between the fault information against disturbing signals, thus it makes the basement of the quick fault judgment and precise fault location.