線路限流電抗器對(duì)工頻過(guò)電壓的影響
郭學(xué)英,王震泉,甄宏寧,牛濤,施超
(中國(guó)能源建設(shè)集團(tuán)江蘇省電力設(shè)計(jì)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(shù)發(fā)生變化,對(duì)線路的工頻過(guò)電壓產(chǎn)生影響。利用電磁暫態(tài)計(jì)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(duì)工頻過(guò)電壓的影響。仿真結(jié)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(guò)電壓。
關(guān)鍵詞:限流電抗器;工頻過(guò)電壓;電容效應(yīng);不對(duì)稱(chēng)短路
中圖分類(lèi)號(hào):TM471 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):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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