一起220 kV線路斷路器單相誤動(dòng)作的事件分析
張翔,陳繼拓,林帆,潘中達(dá)
(國網(wǎng)溫州供電公司,浙江 溫州 325000)
摘 要:針對(duì)某次220 kV線路斷路器檢修時(shí),出現(xiàn)的單相斷路器先自動(dòng)合閘又自動(dòng)跳閘的異常情況,分析其原因?yàn)橹睾祥l裝置與分相配置”遠(yuǎn)方/ 就地”把手的斷路器配合不當(dāng)造成。梳理了典型線路保護(hù)設(shè)置“控回?cái)嗑€閉鎖重合閘”的情況,并針對(duì)事件中三相不一致遙信因繼電器動(dòng)作持續(xù)時(shí)間小于測控裝置防抖時(shí)間而無法上送的問題,提出了增加自保持回路和復(fù)歸按鈕的整改建議。
關(guān)鍵詞:三相不一致;重合閘;電力系統(tǒng);控回?cái)嗑€;防抖時(shí)間
中圖分類號(hào):TM561 文獻(xiàn)標(biāo)識(shí)碼:B 文章編號(hào):1007-3175(2019)06-0024-04
Event Analysis of Single-Phase Maloperation of 220 kV Line-Breaker
ZHANG Xiang, CHEN Ji-tuo, LIN Fan, PAN Zhong-da
(State Grid Wenzhou Electric Power Supply Company, Wenzhou 325000, China)
Abstract: Aiming at the maloperation event that a single-phase circuit breaker of 220 kV line-breaker firstly automatically closed and then tripped during certain 220 kV line-breaker overhaul, this paper concluded the reason that the reclosing device matched improperly with the circuit breaker which configured with the phase-separated “remote/local” handle and combed the conditions of typical line-protection setting, the “control circuit disconnection blocking reclosing”. In terms of the problem that the three-phase inconsistent remote signal in the event couldn’t be sent because the relay action duration was less than the anti-shake time of the measurement and control device, this paper proposed the rectification suggestion of adding the self-holding circuit and the reset button.
Key words: three-phase inconsistent; reclosure; power system; control circuit disconnection; anti-shake time
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