因此快速的潮流分析和过负荷控制是实现在线安全保护的关键。
The key issue to achieve online security protection is the rapid flow calculation and overload control.
该方法以电网电压为同步信号，在电网电压信号的过零点采样直流侧电容电压，并通过周期离散控制可以获得负荷电流有功分量。
The new control way can realize linear control for DC-bus voltage and get the fundamental component of the load current synchronously with a little of calculation.
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