基于信息熵的大型电力系统元件脆弱性评估

发布时间：2018-04-22 05:34

本文选题：大型电力系统 + 脆弱性　；参考：《电力系统自动化》2015年05期

【摘要】：现代大规模电力系统面临着多种不确定性因素,它们给系统带来的扰动已成为系统安全运行的主要威胁之一。针对这一问题,提出一种大型电力系统元件脆弱性评估的新方法:在改进信息熵的基础上,结合含风电电力系统的灵敏度分析及支路容量裕度,研究节点扰动功率安全转移的分布信息,建立衡量节点抗扰动能力的节点脆弱性评估指标;在此基础上,通过补偿法将支路开断转化成两端节点的虚拟注入功率扰动,并采用熵权法将其与节点脆弱性评估结果相结合,提出支路脆弱性综合评估方法。通过IEEE 300节点系统算例,验证了方法的快速有效性,同时分析了影响系统关键元件脆弱性的因素,为电力系统中的误差控制和运行管理提供了参考。
[Abstract]:Modern large-scale power system is faced with many uncertain factors, and the disturbance they bring to the system has become one of the main threats to the safe operation of the system. In order to solve this problem, a new method for vulnerability assessment of large power system components is proposed. Based on improved information entropy, sensitivity analysis and branch capacity margin of wind power system are combined. The distribution information of node disturbance power security transfer is studied, and the vulnerability evaluation index of node is established to measure the node anti-disturbance ability. On this basis, the branch break is transformed into virtual injection power disturbance at both ends of the node by the compensation method. The entropy weight method is used to combine the results of node vulnerability assessment, and a branch vulnerability comprehensive assessment method is proposed. An example of IEEE 300-bus system is given to verify the effectiveness of the method, and the factors affecting the vulnerability of key components are analyzed, which provides a reference for error control and operation management in power system.
【作者单位】：强电磁工程与新技术国家重点实验室华中科技大学;中国电力科学研究院(南京);
【基金】：国家电网公司科技项目(dz71-13-036)~~
【分类号】：TM73

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