| 引用本文: | 金波,肖先勇,陈晶,等.考虑保护失效和电网动态平衡特性的连锁故障风险评估[J].电力系统保护与控制,2016,44(8):1-7.[点击复制] |
| JIN Bo,XIAO Xianyong,CHEN Jing,et al.A method of risk assessment considering protection failures and dynamic equilibrium of power grid[J].Power System Protection and Control,2016,44(8):1-7[点击复制] |
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| 摘要: |
| 保护失效特性严重威胁了电网安全。同时，现代电网受扰动后可调整线路参数，以减缓故障蔓延，具有典型的动态平衡特性。基于复杂网络理论提出了考虑保护失效特性和动态平衡特性的连锁故障风险评估方法。首先，基于隐性故障，定义了保护失效严重度概念，可度量保护对电网安全的影响程度。其次，结合保护失效严重度，建立了变权重模型，以表征电网故障后动态平衡特性。然后，引入风险理论，从复杂网络理论角度评估电网安全风险，以为实际运行提供指导意义。最后，新英格兰39节点算例系统验证了所提方法的有效性和合理性。 |
| 关键词: 电网 连锁故障 动态平衡特性 复杂网络理论 保护失效严重度 风险评估 |
| DOI：10.7667/PSPC151066 |
| 投稿时间：2015-06-25修订日期：2015-09-08 |
| 基金项目: |
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| A method of risk assessment considering protection failures and dynamic equilibrium of power grid |
| JIN Bo,XIAO Xianyong,CHEN Jing,LI Changsong,ZHANG Yin |
| (School of Electrical Engineering and Information, Sichuan University, Chengdu 610065, China;Yunnan Electric Power Research Institute, Kunming 650051, China) |
| Abstract: |
| Protection failures have serious threat to power grid security. It is a typical dynamic equilibrium characteristic when line parameters are revised to mitigate cascading failures after the fault occurs. Based on complex network theory a method of risk assessment, considering protection failures and power grid dynamic equilibrium characteristics, is proposed. Firstly, this paper defines a concept of protection failure severity, measuring the impact of protection failure on power grid security, based on hidden failures. Secondly, a variable weighted model, combined with protection failure severity, is established to characterize the dynamic of power grid. Then, risk theory is introduced to assess power grid security from the point of complex network theory. Finally, the New England 39-bus system is taken as an example and the validity of proposed method is verified. |
| Key words: power grid cascading failures dynamic equilibrium characteristic complex network theory protection failure severity risk assessment |
