摘要
介绍了T接输电线路的主要特点和应用现状,针对三端数据同步方法、差动保护判据、电流互感器(CT)饱和判断方法、运行方式转换逻辑等原理进行了分析,并将其应用于T接线路电流差动保护装置中。动态模拟试验结果表明,基于相关原理开发的T接线路光纤电流差动保护装置性能优越、动作可靠,完全能够满足T接线路全线速动的要求。
It introduces the main characteristics and application status of T-connection lines.It also analyzes three-terminal data synchronization method,differential protection criterion,CT saturation discrimination method,logic-converting operation mode which are applied into T-connection current differential protection device.The dynamical simulation test results show that the performance of fiber differential current protection device for T-connection lines developed according to the principles above is excellent and reliable,which can completely meet the requirement for whole-line quick-action of T-connection lines.
引文
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