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| Analysis of Fragile Lines in Power Grid Based on Multi-link Cascading Failure Diagram |
| HOU Jingyu, SONG Yunzhong
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| School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454003, China |
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Abstract Rapid and correct identification of vulnerable lines is of great significance to maintaining the safety of the power grid and avoiding large-scale power outages. Based on this, this paper proposes an analysis scheme to establish a multi-link accident chain model based on new indicators and generate a chain fault diagram. The model is calculated and analyzed based on the complex network theory, and the line vulnerability is measured based on the system load loss rate. Finally, the IEEE39-bus system is taken as an example to verify the effectiveness of the method. The method breaks through the limitation of a single pair of single lines in the process of establishing an accident chain model by the traditional method and effectively realizes the identification of fragile lines, so as to maintain the safety of the power grid and improve the stability of the power grid.
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Received: 04 November 2022
Published: 17 July 2024
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