Research on Comprehensive Evaluation System for 220/110 kV Electromagnetic Looped Network Operation Modes

Indiscriminate considering all 220/110 kV electromagnetic looped networks to be opened may affect the power system security,reliability and economical efficiency adversely. This paper focuses on this very issue and discusses the operation mode regarding on the circumstance under which looped network shall be opened or closed. A comprehensive evaluation system is put forward in this paper. Also the specific content of each index, evaluation basis and principles are discussed. The evaluation indexes are divided into two major categories as rigid type and elastic type, and the evaluation method of the later one is proposed. The evaluation process for 220/110kV electromagnetic loop operation mode decision is illustrated. The optimization result and impact of the operation mode to all the 220/110 kV electromagnetic loop in Hunan power system are analyzed. Based on the actual 220/110 kV electromagnetic loops operating cases in Hunan Province, feasibility and superiority for certain 220/110 kV electromagnetic loops being closed is verified. Keywordselectromagnetic looped network; operation modes; opened-loop mode; closed-loop mode; evaluation system