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MALOPERATIONOFHIGHFREQUENCYPROTECTIONOF220kVPOWERSYSTEMCAUSEDBYINCORRECTCONNECTIONINSUBSTATIONChenYuping(HainanElectricPowerDispatchingCentreHaikou,570203China海南电网原22OkV马鹅线,长14Ohm,是海南西部电力北送的主干线。自22OkV洛基变电站建成投运后,该线知接进洛基站变成两条线路,即220kV马洛线与洛鹅线,装机容量300MW的洋浦电厂从