基于窗口标识理论的故障集生成方法

Fault sets generation based on the theory of window identification

随着继电保护在线整定及校验技术的发展,对于重新校验整定继电保护所要求的时间越来越苛刻,传统算法要计算全网所有保护设备,明显不能达到在线整定及校验对时间的要求。利用窗口标识技术对故障集做出明确定义,利用母线等值阻抗变化率的特点以及深度优先搜索和回溯技术得到形成故障集的具体方法。当电网发生结构变化时,只考虑重新校验及整定故障集内部继电保护设备,从而提高在线整定及校验所需要的计算速度,节约计算时间。利用故障集算法对某电力网络进行算例分析,得到电网切除线路时,形成的故障窗口及故障约束区域,从而验证了该方法的正确性和有效性。

With the development of the relay on-line setting and checking technology, a stricter and stricter requirement for the time of re-checking and re-setting is put forward, the traditional algorithm which calculates the entire network protection equipment cannot achieve the on-line setting and calibration requirements obviously. Based on the fault set theory, the automatic window identification technology is used to define the fault set, and the characteristics of bus equivalent impedance variation rate, the depth first search and backtracking technique are applied to form the fault set. When power grid structural changes, only the relay protection equipment inside of the fault set needs to be set and checked, and in this way the calculation speed of online setting and checking is improved. A power network is analyzed using the new fault set algorithms, the fault window and the fault constraints region are formed when transmission lines are removed. The results verify the correctness and validity of the method.