• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

ELECTRIC POWER CONSTRUCTION ›› 2023, Vol. 44 ›› Issue (1): 12-20.doi: 10.12204/j.issn.1000-7229.2023.01.002

• National Key R&D Program of China • Previous Articles     Next Articles

Identification of Key Branches for Safety Prevention and Control of Cascading Failures in Interconnected Power Grids

DUAN Zhongfeng1(), WANG Yasong2(), BAI Maojin1(), LIU Wei1(), ZHU Chunping1(), WANG Chengfu2(), DONG Xiaoming2()   

  1. 1. Shandong Electric Power Engineering Consulting Institute Co., Ltd., Jinan 250013, China
    2. Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education (Shandong University), Jinan 250061, China
  • Received:2022-08-12 Online:2023-01-01 Published:2022-12-26
  • Contact: DUAN Zhongfeng E-mail:dzf_3027@163.com;1209475471@qq.com;baimaojin@sdepci.com;liuwei3@sdepci.com;zhuchunping@sdepci.com;wangcf@sdu.edu.cn;dongxiaoming@sdu.edu.cn


With the improvement of the interconnection of power grid, resisting the cascading faults becomes a key problem. In a certain scenario, the key current-carrying branch accidents of power grid will lead to overload cascading faults, threatening the safe operation of the system, which is of great significance to the screening and identification of such critical lines. On the basis of improving the DC power flow model of reactive voltage, the dynamic evolution model of overload-type cascading faults is deduced and constructed. The model takes into account the adjusting effects of power balance and voltage stability devices and the corrective control measures of the system, and accurately simulates the dynamic evolution of the cascading faults of the interconnected system after branch failures, so as to analyze the influence of cascading faults on the system function and structure. On this basis, the importance evaluation index of current-carrying branches of power grid is proposed, and the importance index of each current-carrying branch is obtained through large-scale cascading fault simulation calculation, and finally the effective identification of key branches of power grid is realized. Taking the IEEE 39-bus system as an example, the effectiveness of the proposed model and method is verified.

This work is supported by National Key R&D Program of China (No. 2018YFE0208400) and Shandong Provincial Natural Science Foundation(No.ZR2020ME195).

Key words: interconnected grid, overload cascading fault, key branch, improve DC power flow, calibration control

CLC Number: