35kV不接地系統(tǒng)諧振事故及抑制措施仿真分析

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摘  要：該文對一起35 kV不接地系統(tǒng)諧振事故進行分析。通過在PSCAD中搭建仿真模型，模擬電容器組在各種退出方式下PT的電壓、電流變化情況。通過事故全過程分析，得出斷路器重燃是這次事故的主要原因。針對此次故障，還通過仿真選出合適的諧振抑制措施。

關(guān)鍵詞：鐵磁諧振;斷路器重燃;過電壓;PSCAD仿真;故障分析

中圖分類號：TM935      文獻標志碼：A          文章編號：2095-2945（2022）24-0116-06

Abstract： In this paper， a resonant accident of 35 kV ungrounded system is analyzed. By building a simulation model in PSCAD， the voltage and current changes of PT under various exit modes of capacitor banks are simulated. Through the analysis of the whole process of the accident， it is concluded that the reignition of the circuit breaker is the main cause of the accident. In view of this fault， the appropriate resonance suppression measures are selected by simulation.

Keywords： ferromagnetic resonance; circuit breaker reburning; overvoltage; PSCAD simulation; fault analysis

電力系統(tǒng)包含許多電感和電容元件，電感元件有電力變壓器、互感器、發(fā)電機、消弧線圈及線路導(dǎo)線等，電容元件有線路導(dǎo)線對地電容、相間電容、補償用的串聯(lián)和并聯(lián)電容器及各種高壓設(shè)備的寄生電容等。（剩余5010字）