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中文摘要：
提出要实现电力系统连锁故障的预防控制需做到3步：识别系统的脆弱线路,搜索脆弱线路的输电断面,给出控制策略。根据脆弱线路不仅易受到系统扰动的影响,而且其切除极有可能导致全网潮流的大范围转移,提出分别利用冲击脆弱性和转移脆弱性来表征线路的抗冲击能力和其断开对系统的危害,进而得到识别脆弱线路的综合指标。为了判断脆弱线路切除后是否会导致连锁故障,利用各线路功率传输分布因子的差异系数,提出输电断面搜索新算法。从而只需通过分析线路切除对输电断面内线路的影响即可快速评估线路断开对整个系统的影响。IEEE 39节点标准算例结果,验证了所提指标和算法均有效、可行。
英文摘要：
Three steps are proposed to realize the prevention and control of power system cascading failure： vulnerable line identification,transmission section search and control strategy design. Since the vulnerable line is easily affected by the system disturbance and its removal may cause the power flow transfer in whole power network,a comprehensive index is proposed to identify the vulnerable lines,which applies the impact vulnerability to represent its impact-resistance ability and the transfer vulnerability to represent the damage caused by its removal to system. A method of transmission section search based on the difference coefficient of power transmission distribution factor between transmission lines is proposed to determine whether the removal of a vulnerable line will cause a cascading failure. Therefore,the impact of transmission line removal on whole system can be quickly evaluated by only analyzing its impact on the lines within the transmission section. Results of calculation for the standard IEEE 39-bus system verify the proposed index and method are effective and feasible.
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