Assessment of commutation failure in HVDC systems considering spatial-temporal discreteness of AC system faults

• 作者: Chaoyun YU Huanhuan YANG Xiaohua LI Zexiang CAI
• 来源期刊: 现代电力系统与清洁能源学报(英文)
• 学科: 工学
• 关键词: COMMUTATION FAILURE Spatial-temporal DISCRETENESS Phase SHIFT ASSESSMENT method
• 年，卷（期）: 2018,（5）
• 页码范围: 1055-1065
• 页数: 11页
• 分类号: TM721.1

摘要

This paper presents a novel commutation failure(CF) assessment method considering the influences of voltage magnitude drop, phase shift, and spatial-temporal discreteness of AC system faults. The commutating voltage-time area is employed to analyze the spatial-temporal discreteness of AC system faults causing CF in high-voltage direct current systems, and the influences of fault position and fault time on CF are revealed. Based on this, a novel CF criterion is proposed, further considering the influence of voltage phase shift and the spatial-temporal discreteness. Then this research develops a new CF assessment method, which does not rely on electromagnetic transient simulations. A real case from the China Southern Power Grid is used to verify the practicability of the proposed method by comparing with simulation results obtained using PSCAD/EMTDC.