在高中压系统，充电保护电流定值是按躲过最小运行方式故障电流整定，并要求瞬时动作；
In high-middle voltage power system, the current setting of the charge-protection always bases on the fault current in the minimal operation mode, and the break should be snapped action.
电流数据采样的离散性和采样初始时刻的不确定性是导致采样瞬时值电流差动保护动作值模糊区产生的根本原因。
The decentralization of sampled value and the uncertainty of sampled time bring forth the action fuzzy area of sampled value current differential protection.
该文对零输出换相策略、电压增益及开关动作顺序进行了详细的分析，并与双电压合成控制策略下共模电压的最大瞬时值进行了对比。
The paper analyzes in detail the synthetical method, the voltage gain and the switch action sequence of matrix converter based on the zero-output commutation strategy.
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