RISK VALUATION IDENTIFICATION METHOD OF PROTECTION MISMATCH FOR NEW ACTIVE DISTRIBUTION NETWORKS

Dai Zhihui; Ning Zhiheng; Luan Kun; Liu Junyi; Ding Yangtian; Liu Zhiren

doi:10.19912/j.0254-0096.tynxb.2025-0120

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (6) : 47-57. DOI: 10.19912/j.0254-0096.tynxb.2025-0120

RISK VALUATION IDENTIFICATION METHOD OF PROTECTION MISMATCH FOR NEW ACTIVE DISTRIBUTION NETWORKS

Dai Zhihui¹, Ning Zhiheng¹, Luan Kun¹, Liu Junyi¹, Ding Yangtian¹, Liu Zhiren²

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Abstract

This paper proposes a detection method for protection mismatch risk settings tailored for high-penetration renewable energy integration scenarios. Using a typical topology of high-penetration distributed renewable energy systems, the degradation mechanism of protection performance is analyzed in depth. Furthermore, the constraints on correct protection operation are revealed by investigating the root causes of protection misoperation and failure to trip. Based on this analysis, the mapping relationship between DG output and protection mismatch risk settings is quantitatively examined. The boundary of protection failure is further determined using a dual-loop iteration method based on the backbone particle swarm optimization （PSO） algorithm. Finally, a comprehensive identification procedure for protection mismatch risk settings is developed. The effectiveness of the proposed approach is validated through simulations using the PSCAD/EMTDC and Matlab/Simulink platforms.

Key words

distribution network / distributed generator / relay protection / risk valuation identification / current protection / incorrect action / protection failure boundary

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Dai Zhihui, Ning Zhiheng, Luan Kun, Liu Junyi, Ding Yangtian, Liu Zhiren. RISK VALUATION IDENTIFICATION METHOD OF PROTECTION MISMATCH FOR NEW ACTIVE DISTRIBUTION NETWORKS[J]. Acta Energiae Solaris Sinica. 2026, 47(6): 47-57 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0120

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