中国电力 ›› 2017, Vol. 50 ›› Issue (6): 62-68.DOI: 10.11930/j.issn.1004-9649.2017.06.062.07

• 电网 • 上一篇    下一篇

考虑一致性风险价值的电网薄弱环节综合评估指标

栾翔1, 于群1, 贺庆2, 曹娜1, 易俊2   

  1. 1. 山东科技大学 电气与自动化工程学院,山东 青岛 266590;
    2. 中国电力科学研究院,北京 100192
  • 收稿日期:2017-01-17 出版日期:2017-06-20 发布日期:2017-07-12
  • 作者简介:栾翔(1991-),男,山东龙口人,硕士研究生,从事电力系统安全分析、大电网安全防御研究。E-mail: ymyy.happy@163.com
  • 基金资助:
    山东省自然科学基金项目(ZR2016EEM13)

Integrated Assessment Index of Power Grid’s Weak Links by Considering Coherent Value at Risk

LUAN Xiang1, YU Qun1, HE Qing2, CAO Na1, YI Jun2   

  1. 1. College of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao 266590, China;
    2. China Electric Power Research Institute, Beijing 100192, China
  • Received:2017-01-17 Online:2017-06-20 Published:2017-07-12
  • Supported by:
    ; This work is supported by the Natual Science Fund of Shandong Province (No. ZR2016 EEM13).

摘要: 电网的薄弱环节直接影响电力系统的安全稳定运行。为了找出电力系统的薄弱环节,首先给出了一致性风险价值指标,利用IEEE39节点系统验证了该指标的有效性,并将指标与当前常用的自组织临界性指标和效用风险熵指标进行比较。在此基础上,通过指标标准化建立了模糊评判矩阵,利用客观熵权法和改进的层次分析法确立了综合评估指标。最后利用综合评估指标对湖南电网的薄弱环节进行了评估分析。电网实例分析结果表明该综合评估指标能够清晰地对电网的薄弱环节进行定位,评估结果可以作为电网规划和制定事故预防措施的参考。

关键词: 薄弱环节, 一致性风险价值, 自组织临界, 效用风险熵, 客观熵权法, 改进的层次分析法

Abstract: The weak links of power grid directly influence the safe operation of power system. In order to identify the weak links, the paper proposes the index of coherent value at risk(CVaR), whose reliability has been proved by the simulation results of IEEE 39-bus system. Furthermore, The CVaR is compared with the commonly used self-organized criticality and effect risk entropy. Based on the comparison results, the fuzzy evaluation matrix is established through the standardization index. Meanwhile, an integrated assessment index is obtained by use of the objective entropy method and improved analytical hierarchy process. Finally, the integrated assessment index is applied to analysis of the Hunan power grid’s weak links. The results show that the integrated assessment index can clearly locate the weak links of power grid, and the assessment result can provide an instruction for planning power networks and a reference for formulating preventive measures.

Key words: weak links, coherent value at risk, self-organized criticality, effect risk entropy, objective entropy method, improved analytical hierarchy process

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