(1. 中国电力科学研究院， 北京市 100192; 2. 国网上海市电力公司， 上海市 200122)
(1. China Electric Power Research Institute, Beijing 100192, China; 2. State Grid Shanghai Municipal Electric Power Company, Shanghai 200122, China)
Based on an analysis of the cause and developing process of blackouts in a super megacity power system, the key factors endangering the security of the system are pointed out. The power system intrinsic physical characteristic is expounded that in the overload condition of a power transmission grid in the receiving-end grid, the interactions between various electrical variables can cause the system state to deteriorate gradually during the adjustment process of the generator units in the receiving-end grid. By referring to the characteristics of the receiving-end grid in a long distance power transmission system with large capacity and the problems from increasing penetration of intermittent generation sources, the weak links of the security analysis, security assessment and security defense system are discussed in terms of power grid planning and operation control, respectively. Countermeasures to reduce blackout risk are presented. A new expatiation and recommendation on the configuration of three-precautionary lines for insuring the security of the power system is put forward.
YANG Haitao, ZHU Dakang, LI Jing, et al. A Discussion on Mechanism and Countermeasures of Blackouts in Super Megacity Power Networks[J]. Automation of Electric Power Systems, 2014, 38(6):128-135. DOI:10.7500/AEPS20130819007.