3.6~40.5 kV斷路器容性負(fù)載開合試驗(yàn)回路研究
康志林,胡新明,羅園
(甘肅電器科學(xué)研究院,甘肅 天水 741018)
摘 要:高壓斷路器( 尤其是真空斷路器) 開合容性電流時(shí),會(huì)產(chǎn)生電壓和電流的暫態(tài)現(xiàn)象,可能導(dǎo)致很高的過電壓和關(guān)合涌流,甚至?xí)?dǎo)致重?fù)舸?duì)電網(wǎng)造成嚴(yán)重威脅。對(duì)電容性負(fù)載的使用工況進(jìn)行了分析,設(shè)計(jì)了適用于 3.6~40.5 kV 電壓等級(jí)的試驗(yàn)回路以滿足該電壓等級(jí)的開關(guān)試驗(yàn),并探討了高壓斷路器容性電流開合試驗(yàn)方法。該試驗(yàn)回路在大容量試驗(yàn)室得到了很好的應(yīng)用,各項(xiàng)容性開合試驗(yàn)數(shù)據(jù)均符合標(biāo)準(zhǔn)要求。
關(guān)鍵詞:高壓斷路器;容性電流開合;直接試驗(yàn);試驗(yàn)方法
中圖分類號(hào):TM561 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2021)07-0052-03
Research on Capacitive Load Switching Test
Circuit of 3.6~40.5 kV Circuit-Breaker
KANG Zhi-lin, HU Xin-ming, LUO Yuan
(Gansu Electrical Apparatus Science Research Institute, Tianshui 741018, China)
Abstract: When the high voltage circuit-breaker(especially the vacuum circuit-breaker)switches capacitive current, the transient phenomena of voltage and current will appear which probably causes excessive overvoltage and inrush current, or even causes a restrike threatening the security of power grid. In this paper, the operating condition of capacitive load is analyzed, and the test circuit suitable for 3.6~40.5 kV voltage is designed to meet the requirements of the switch tests, and additionally, the capacitive current switching test of high voltage circuit breaker is discussed. Lastly, this test circuit is applied well in the large-capacity laboratory, and all the testing data of capacitive switching
conform to the standard.
Key words: high voltage circuit-breaker; capacitive current switching; direct test; test method
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