【摘要】 引入数学形态学以提高基于故障暂态的超高速线路方向保护的动作性能。在获取连接在同一母线上的各条输电线路暂态电流信号的基础上,采用数学形态学分析其极性和能量以确定故障方向。仿真结果证明,该方法适用于识别发生在输电线路不同位置的各种故障。该方案对处理器的采样率、处理能力和速度几乎没有额外的要求,具有很好的实用性。与传统保护算法相比,基于 MG 的 TBDP 具有更高的可靠性和较少的计算量,同时具有更快的故障响应能力和更高的灵敏性。更多还原

【Abstract】 A novel signal processing tool, mathematic morphology (MM), is introduced to improve the performance of fault transient based ultra-high-speed directional relay. In the presented technique, the transient current signals captured from each transmission line connected to the busbar are collected by the relay installed at the substation busbar for analyzing with MM to determine the fault direction. Simulation results show that this scheme is suitable for identifying all types of faults occurring at different positions on the power lines. This scheme has high availability in that it has no specific requirement to the sampling rate, processing capability and speed of the processor. The MG based TBDP scheme has higher reliability and less computational complexity, and provides higher sensitivity together with faster fault response as compared with traditional protection schemes.更多还原