摘要
电网的脆弱性问题,作为电网安全问题的深入和扩展,具有重大的研究价值。从能量函数的观点出发,建立了完整的支路静态能量函数模型,综合考虑了系统的多个物理量对能量信息的映射,能够更加全面且准确地反映不同运行状态下的支路脆弱性。基于能量信息构建了脆弱灵敏度指标及脆弱度指标分别评估系统的支路脆弱性和脆弱程度,并分析了系统负荷和线路结构发生变化时对脆弱灵敏度的影响,确定了电网的关键脆弱支路。通过对IEEE-30母线系统的仿真,验证了所提指标的可行性和有效性,可望用于在线评估。
Power grid vulnerability, as the deepening and developing issue of network security, shows its great research significance. Based on the energy function theory, the branch static energy function model is constructed comprehensively. Multi physical quantity is mapped to the amount of branch energy. The branch vulnerability can be reflected more accurately under different operation state. And then, the vulnerable sensitivity index established in the form of energy is established to assess vulnerability and the branch vulnerability index is proposed to evaluate branch vulnerability degree. The vulnerable sensitivity with the system load and structure changing is analyzed to confirm the key vulnerable branch. At last, the simulations of this method in IEEE-30 bus system demonstrate its validity and feasibility. The proposed approach is promising to be applied in on line vulnerability assessment.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2012年第15期7-11,115,共6页
Power System Protection and Control
关键词
电力系统脆弱性
支路能量函数
脆弱性评估
脆弱支路
关键脆弱支路
power system vulnerability
branch energy function
vulnerability assessment
vulnerable branch
key vulnerable branch
