提高小负荷电流测量成功率探讨

Discussion on Improving the Success Rate of Small Load Current Measurement

在新建或技改变电站现场送电时,开关、刀闸和保护等一次设备投运完毕后,需要在保护装置上对负荷电流进行相位的测量,以确定二次回路接线的正确性,防止因回路问题使保护装置采样错误而导致的保护误动作。小负荷电流相位测量一次成功率的提高,缩短了测量负荷电流时的等待时间,有利于及时发现二次回路的问题,消除变电站新投运线路的安全隐患,对保证电网的稳定、经济运行有重要意义。

In new or technical change power station power transmission, switches, knife switch and protection of equipment operation is completed, in need of protection device of load current phase measurements, to determine the two circuit wiring is correct, prevent circuit problem make the protection device sampling error caused by protection maloperation. Small load current phase measurement at one time success rate, shorten the waiting time of the measured load current, is conducive to timely detection of the two circuit problem, elimination of substation operation line security risks, to ensure the stable, and economic operation has important significance.