500kV柳贺线串联电容补偿装置若干故障分析

Analysis on Several Faults of Series Capacitance Compensation Device of 500kV Liuhe Lines

针对500 kV柳贺线串联电容补偿装置运行和试验中出现的一些故障,如直流接地导致旁路开关误动作、平台光纤接口模块采样异常导致间隙导通、保护重复性自动退出、地面触发空气间隙损坏等4种故障,分析故障产生的原因,通过在控制逻辑中对相关非电气量开入进行延时确认、更换故障元件、改变隔离开关的操作顺序和改进现场二次设备的布局走线等措施,提高了二次设备的抗干扰能力。现场运行情况说明所采取的措施能提高串联电容补偿装置的可靠性。

Aiming at some faults of series capacitance compensation devices of 500 kV Liuhe lines in operation and testing such as malfunction of bypass switchgear resulted from direct current grounding,gap conduction caused for reason of abnor-mal sampling of platform fiber interface module,repeated and automatic exit of protection and air gap damage caused by ground triggering,this paper analyses reasons for these four faults.By using measures such as confirming correlated non-e-lectric quantities in delay,changing fault components,changing operational sequences of disconnectors and improving distri-bution and routing of on-scene secondary equipments,it improves anti-interference capabilities of secondary equipments. On-scene operation indicates that those applied measures are able to improve reliabilities of series capacitance compensation devices.