換流變壓器現(xiàn)場高壓試驗(yàn)電暈分析及措施
周海濱1，劉婉瑩1，馮家偉2，張新波1
（1 中國南方電網(wǎng)超高壓輸電公司 檢修試驗(yàn)中心，廣東 廣州 510663；2 華南理工大學(xué) 電力學(xué)院，廣東 廣州 510640）
摘 要：在現(xiàn)場開展換流變壓器交直流耐壓、局部放電等高壓試驗(yàn)時，高壓電暈會對試驗(yàn)結(jié)果產(chǎn)生嚴(yán)重干擾，電暈損失也會增加試驗(yàn)電源的負(fù)擔(dān)。結(jié)合±800 kV 特高壓直流工程建設(shè)實(shí)際，建立高壓試驗(yàn)中防暈導(dǎo)線的模型，仿真分析在不同電壓類型、不同電壓等級、不同導(dǎo)線直徑以及不同導(dǎo)線連接狀況下試驗(yàn)線路上的場強(qiáng)分布狀況，得出影響防暈導(dǎo)線最大場強(qiáng)的影響因素，并對防暈導(dǎo)線的對接結(jié)構(gòu)進(jìn)行改進(jìn)，開發(fā)出了新型防暈導(dǎo)線。
關(guān)鍵詞：電場強(qiáng)度；電暈；對接；防暈導(dǎo)線
中圖分類號：TM41；TM835.4 文獻(xiàn)標(biāo)識碼：B 文章編號：1007-3175(2017)02-0039-04
Analysis of Onsite High-Voltage Test Corona in Converter Transformer and Measure
ZHOU Hai-bin1, LIU Wan-ying1, FENG Jia-wei2, ZHANG Xin-bo1
（1 Test & Maintenance Center, China Southern Power Grid Extra High Voltage Power Transmission Company, Guangzhou 510663, China;
2 School of Electric Power, South China University of Technology, Guangzhou 510640, China）
Abstract: When high-voltage tests of converter transformer such as alternating current and direct current withstand voltage and partial discharge were carried out on site, the high-voltage corona would seriously disturb the test results and the corona loss would increase the load of experimental power supply. Combined with ±800 kV extra-high voltage direct current practical engineering construction, this paper established the anti-corona wire model in high-voltage test. Simulation analysis was made to the field intensity topography of test circuits under the conditions of different voltage type, different voltage grade, different wire diameter and different wire connection, so as to obtain the influence factor on the maximum field intensity of anti-corona wire, improving the docking structure of anti-corona wire and developing new type of anti-corona wire.
Key words: electric field intensity; corona; docking; anti-corona wire
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