变电站继电保护二次极性的分析

Analysis on the Secondary TA Polarity Determination of Substation Protection

目前变电站继电保护装置普遍采用差动保护作为主保护,差动保护的工作原理是利用基尔霍夫电流定理流入和流出被保护设备的二次电流之和来判断设备的工作状态(正常状态、故障状态)。文中主要探讨接入线路保护、母线保护及主变保护装置的电流互感器二次极性,确保保护装置正确可靠的动作。

Generally,the main protection of a substation at present is differential protection.The principle of differential protection is that the condition of the equipment being protected can be determined according to the sum of current flowing in and out of the equipment.In this article,the secondary TA polarity determination for line protection,busbar protection and transformer protection was discussed.