基于云模型的动态调整拓扑限制短路电流快速开关布点决策综合评价方法

doi:10.19595/j.cnki.1000-6753.tces.242361

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Abstract Fast switch location decision-making lacks a comprehensive evaluation method for short-circuit current limitation measures through dynamic topology adjustment. This paper proposes a cloud model-based comprehensive evaluation method for dynamic topology-adjusted short-circuit current limitation measures, grounded in the concept of scheme formation and evaluation.
Firstly, the location selection of fast switches in substations and lines under typical wiring modes is discussed. After determining the set of fast switch location scheme sets, a comprehensive evaluation system for fast switch location decision-making is established by combining relevant influencing factors under dynamic topology adjustment for short-circuit current limitation. This system encompasses five aspects: short-circuit current, transient stability, static security, power supply reliability, and implementation cost. Secondly, the Analytic Hierarchy Process-Entropy Weight method, which combines the subjective and objective factors, is used to determine the comprehensive weight matrix of the evaluation index system. Subsequently, a cloud theory-based evaluation model is constructed. The digital feature parameters of a hierarchical cloud model are obtained for each index corresponding to the grading level. Standard evaluation cloud models are then established, and the evaluation index of the cloud correlation degree is calculated. Accordingly, the comprehensive evaluation matrix is obtained. Then, the weighted membership degrees of each location scheme set across evaluation levels are calculated by combining the weight matrix and evaluation matrix. Following the maximum membership principle, the evaluation level of each location scheme is determined. Finally, simulations using operational data from a regional power grid in China validate the effectiveness of the proposed method.
The main contributions of this paper are as follows. (1) A comprehensive evaluation system for fast switch location decision-making is established, ensuring short-circuit current limitation effectiveness while holistically considering transient stability, static security, power supply reliability, and implementation costs. The proposed system enhances decision-making rationality and supports grid development. (2) The Analytic Hierarchy Process-Entropy Weight method reduces subjective bias. It ensures the rationality and reliability of indicator weights, considering both expert experience and the actual essential indicators. (3) Based on cloud theory and the quantitative criteria of each index evaluation grade, the comprehensive evaluation model can overcome the fuzziness and randomness between the quantitative index value and the evaluation grade boundary, improving the engineering applicability. (4) The simulation results demonstrate that the proposed model and method intuitively give the comprehensive evaluation results and ranking of each location scheme, which provides a basis for the decision-making and application of dynamic adjustment topology to limit the distribution of short-circuit current fast switches.

Key words： Short-circuit current comprehensive evaluation fast switch location decision-making topology adjustment cloud model

Received: 26 December 2024

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TM712

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	Liu Jiajun
	Wang Zitong
	Sun Ji
	Lin Haokun
	Li Chenjing

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Liu Jiajun,Wang Zitong,Sun Ji等. A Comprehensive Evaluation Method Based on Cloud Models for Fast Switch Location Decision-Making in Short-Circuit Current Limitation Measures by Dynamic Adjustment of Topology[J]. Transactions of China Electrotechnical Society, 2025, 40(24): 8093-8107.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.242361 OR https://dgjsxb.ces-transaction.com/EN/Y2025/V40/I24/8093

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