摘要
从系统学角度出发,综合考虑系统中元件的结构属性、状态属性及社会属性,提出一种考虑元件综合重要度的电网安全性风险评估方法。综合元件结构重要度因子模型与元件状态灵敏度因子模型构建元件综合重要度模型,该模型克服了传统风险评估方法中对于不同元件的重要度无法表征的不足;综合考虑电网结构与状态,建立表征电网潮流分布均衡性与负荷损失的严重度模型,完善安全性风险评估指标体系。仿真结果表明,相较于传统方法,该方法对电网N-1故障风险排序更为合理,对N-k故障序列分级风险辨识度更高。
From the systematologic point of view,a method of power grid security risk assessment based on the integrated element importance index is proposed,which comprehensively considers the structural,conditional and social attributes of element. An integrated element importance model based on the structural importance factor model and status sensitivity factor model of element is built,which overcomes the shortage of traditional risk assessment method in characterizing the importance of different elements. A model considering the structure and condition of power grid is built to characterize the proportionality of power flow distribution and the severity of load loss,and to improve the risk assessment index system of power grid security. Simulative results show that,compared with the traditional methods,the proposed method ranks the power grid N-1 contingency risk more reasonably and recognizes the N-k contingency series grading risk more precisely.
出处
《电力自动化设备》
EI
CSCD
北大核心
2015年第4期132-138,144,共8页
Electric Power Automation Equipment
关键词
复杂网络
结构重要度因子
状态灵敏度因子
风险评估
N-k故障
安全性
故障分析
complex network
structural importance factor
state sensitivity factor
risk assessment
N-k contingency
security
failure analysis
