变换器1被控制为一个基波正弦电流源，变换器2被控制为一个可控电压源。
The converter 1 is controlled as a fundamental sinusoidal current source, and the converter 2 is controlled as a voltage source.
利用电压源与电流源之间的等效变换求解某一支路电压、电流，是电工基础理论中非常方便的方法。
In the electrotechnics basis theory, it's very convenient to solve one branch's voltage and current by the equivalent transformation between the voltage source and current source.
分析了带微分环节的电压滞环的变环宽的原理，指出带微分滞环控制的脉宽调制(PWM)变换器可作为理想的可控电压源。
The paper analyzed the voltage hysteresis with differentiation elements, and pointed out that the PWM converter with differentiation hysteresis controls can be used as the ideal voltage source.
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