T接线路差动保护的应用

首先介绍了绍兴地区T接线路的应用情况以及T接线路应用传统保护所遇到的技术困难,提出并建议基于光纤通道的电流差动保护是最适合T接线路的保护。着重分析了绍兴局开发的一种专用于T接线路的光纤电流差动保护装置的实际应用情况,并通过T接线路发生的一个实际的内部故障,对比了常规保护配置和多端差动保护的动作性能,结果表明多端电流差动保护非常适用T接线路,充分展示了其性能的优越性。

Application of multi-terminal lines current differential protection

The reality of wide application of T-connection lines around Shaoxing area and the technology difficulties which electrical engineers have to meet resulting from configuring conventional protection relays are introduced.The paper presents the current differential protection scheme based on optical fiber channels,which is the best solution for T-connection lines.Several current differential protection devices developed by Shaoxing utilities are installed on T-connection lines of local electrical system.The field running experience presents that the kind of device is very suitable for T-connection lines.The excellent performance is obviously identified through comparing operation behavior during a real internal fault between the presented protection and the conventional protection installed on the same lines.