線路限流電抗器對工頻過電壓的影響
郭學英,王震泉,甄宏寧,牛濤,施超
(中國能源建設集團江蘇省電力設計院有限公司,江蘇 南京 211102)
摘 要:加裝限流電抗器使線路的正序及零序阻抗參數發生變化,對線路的工頻過電壓產生影響。利用電磁暫態計算軟件EMTP,研究了江蘇蘇南500 kV惠泉- 梅里線路加裝限流電抗器對工頻過電壓的影響。仿真結果表明:在500 kV惠泉- 梅里線路加裝限流電抗器可減小線路的工頻過電壓。
關鍵詞:限流電抗器;工頻過電壓;電容效應;不對稱短路
中圖分類號:TM471 文獻標識碼:A 文章編號:1007-3175(2018)11-0037-03
Effects of Line Current-Limiting Reactor on Power Frequency Overvoltage
GUO Xue-ying, WANG Zhen-quan, ZHEN Hong-ning, NIU Tao, SHI Chao
(Jiangsu Electric Power Design Institute of China Energy Engineering Group Co., Ltd, Nanjing 2111 02, China)
Abstract: Adding a current-limiting reactor on a line can change the system forward-sequence and zero-sequence impedance parameters, which can further affect the power frequency overvoltage.The electromagnetic transient calculation software EMTP was used to research on the affect of adding a current-limiting reactor on the 500 kV Huiquan ~ Meili lines’ power frequency overvoltage.The simulation results show that the 500 kV Huiquan ~ Meili lines with current-limiting reactors can reduce the power frequency overvoltage.
Key words: current-limiting reactor; power frequency overvoltage; capacitance effect; asymmetry short-circuit
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