引用本文: | 丁 梁,黄建杨,徐 恩,等.考虑复杂环境特性的电网线路脆弱性综合评估与
结构优化分析[J].电力系统保护与控制,2021,49(13):105-113.[点击复制] |
DING Liang,HUANG Jianyang,XU En,et al.Comprehensive vulnerability assessment and structure optimization analysis of power grid lines considering complex environmental characteristics[J].Power System Protection and Control,2021,49(13):105-113[点击复制] |
|
摘要: |
现代电网中存在的薄弱环节会造成偶然事故的扩大发展,对电网及其元件的脆弱性评估对于防范大规模停电事故有重要意义。围绕电网线路脆弱性评估的问题,建立了综合考虑结构脆弱性、状态脆弱性和环境脆弱性的线路脆弱性综合评估体系。环境脆弱性部分选择具有代表性的雷击、覆冰、强风、污秽、山火和外力破坏作为脆弱性指标。随后基于IEEE39节点系统计算得到线路脆弱性评估的结果,并与其他文献方法的计算结果进行对比,验证了所构建评估方法的合理性。最后基于线路脆弱性的评估结果,进一步分析了网络结构均匀性的问题。结果表明,采用单一指标对线路进行脆弱性分析时会遗漏某些脆弱单元。综合考虑结构特性、状态特性和环境特性构建的综合指标能更好地对线路进行脆弱性评估。网络的拓展与演化存在“择优连接”的特性,高介数的线路、节点也必然形成,可以通过采用“反择优连接”,比如降低节点度的最大值来促进网络结构更加均匀。 |
关键词: 脆弱性评估 环境特性 基尼系数 均匀系数 结构优化 |
DOI:DOI: 10.19783/j.cnki.pspc.201061 |
投稿时间:2020-09-17修订日期:2021-05-30 |
基金项目:国家电网有限公司总部科技项目资助“大区域电网对埋地金属管网能源安全输送影响与防护研究”(52170219001D) |
|
Comprehensive vulnerability assessment and structure optimization analysis of power grid lines considering complex environmental characteristics |
DING Liang1,HUANG Jianyang1,2,XU En2,HUANG Shunyong3,LU Hailiang3,WEN Xishan3 |
(1. State Grid Zhejiang Zhuji Power Supply Co., Ltd., Zhuji 311800, China; 2. Zhuji Branch of Shaoxing Daming
Electric Power Design Co., Ltd., Zhuji 311800, China; 3. School of Electrical Engineering and Automation,
Wuhan University, Wuhan 430072, China) |
Abstract: |
The weak links in modern power grids will cause the expansion and development of accidents. The vulnerability assessment of the power grid and its components is of great significance for preventing large-scale power outages. This paper focuses on the vulnerability assessment of power grid lines, and establishes a comprehensive assessment system of line vulnerability that considers structural vulnerability, state vulnerability and environmental vulnerability. The environmental vulnerability part selects representative lightning strikes, icing, strong winds, pollution, wildfires and external damage as indicators of vulnerability. Then, based on the IEEE 39-bus system calculation, the result of the line vulnerability assessment is obtained, and compared with the calculation result of the existing method, the rationality of the constructed assessment method is verified. Finally, based on the evaluation results of the vulnerability of the line, the uniformity of the network structure is further analyzed. The results show that when a single index is used to analyze the vulnerability of the line, some vulnerable units will be omitted. The comprehensive index constructed by considering the structural characteristics, state characteristics and environmental characteristics can better evaluate the vulnerability of the line. The expansion and evolution of the network has the characteristic of "preferred connection", and high betweenness lines and nodes will inevitably form. By adopting "anti-optimal connection", for example, reducing the maximum value of the node degree can promote a more uniform network structure.
This work is supported by the Science and Technology Project of the Headquarters of State Grid Corporation of China “Research on the Influence of Large-area Power Network on Buried Metal Pipeline Network Energy Safety Transmission and its Defense (No. 52170219001D). |
Key words: vulnerability assessment environmental characteristics Gini coefficient uniformity coefficient structural optimization |