基于阻抗匹配原理的继电保护控制策略研究

Research on Relay Protection Control Strategy Based on Impedance Matching Principle

随着智能电网技术的发展,传统的两端输电系统也开始逐步向三端甚至多端输电系统发展。将原先应用于两端输电系统的基于阻抗匹配原理的继电保护控制策略进行优化扩展,推广到三端及多端输电系统,提出针对广域输电系统的继电保护控制策略。经过仿真验证,该继电保护策略能对区域内故障和区域外故障进行准确的判定,且该算法整定简单,不会受到分布电容、分布电流、过渡电阻等因素的影响,辨识灵敏度较高。

The relay protection control strategy based on impedance matching principle originally applied to two terminal transmission system is optimized and extended to three terminal and multi terminal transmission system,and a relay protection control strategy for wide area transmission system is proposed.The simulation results show that the relay protection strategy can accurately determine the faults in and out of the area,and the algorithm can be simple setting,will not be affected by the factors such as distributed capacitance,distributed current and transition resistance,and has high identification sensitivity.