变压器纵差保护校验方法研究

Research of Transformer Longitudinal Differential Protection Check

变压器纵差保护校验需要深厚的理论基础和精确的计算,对于从事继电保护校验工作的新员工来说是一个不小的挑战。此文所用方法是利用继电保护测试仪向保护装置通入电流,使保护装置达到稳态平衡、模拟正常运行状态,调整电流的大小,实现比率制动特性的校验。对相位、幅值校正和补偿电流的产生等难点问题做了详细的讲解,极大的提升了新员工培训工作的效率。

The transformer longitudinal differential protection check requires a solid foundation of theory and accurate calculation, which is a big challenge for new employees of State Grid. The method employed in this paper is to use a relay protection testing device to provide current to a protective device so as to make the protective device reach steady balance and simulate the normal operation state, adjust the current intensity and realize the check of ratio restraint characteristics. This paper presents detailed explanation of difficult problems such as phase, amplitude calibration and compensating current production, greatly improving the efficiency of new employee training work.