基于RC裝置的風(fēng)電場合閘暫態(tài)過電壓防護(hù)的仿真研究
龔祖春1,孫留學(xué)2,張濤2,胡漢梅2
(1 中國葛洲壩集團(tuán)電力有限責(zé)任公司,湖北 宜昌 443002;
2 三峽大學(xué) 電氣與新能源學(xué)院,湖北 宜昌 443002)
摘 要:介紹了風(fēng)電場電氣設(shè)備遭受過電壓時(shí)的特點(diǎn)及其危害,采用PSCAD 電磁暫態(tài)仿真軟件建立了風(fēng)電場模型,分析了風(fēng)電場合閘過電壓的過程,提出了阻容吸收器防護(hù)機(jī)端變壓器過電壓措施,結(jié)果表明:采用合適的阻容保護(hù)裝置可以將過電壓幅值和陡度限制在合理的電壓范圍內(nèi),能夠有效防止風(fēng)電場合閘過電壓。
關(guān)鍵詞:風(fēng)電場;過電壓;RC 裝置;絕緣;電纜系統(tǒng)
中圖分類號(hào):TM614;TM862 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2016)05-0019-04
Simulation Study on Transient Overvoltage Protection in Wind Farms Closing Based on RC Device
GONG Zuchun1, SUN Liu-xue2, ZHANG Tao2, HU Han-mei2
(1 Gezhouba Group's Electric Power Company Ltd, Yichang 443002, China;
2 College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China)
Abstract: Introduction was made to the characteristic and its damages of overvoltage in wind farms. This paper established a wind farm model of PSCAD electromagnetic transient simulation, analyzed the process of closing overvoltage, and proposed overvoltage protection measures of wind turbines transformers using resistance-capacitance absorber. The results show that adopting suitable resistance-capacitance protector could restrict the amplitude of voltage and gradient within the reasonable scope, which prevents wind farms closing overvoltage effectively.
Key words: wind farm; overvoltage; RC device; insulation; cable system
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