说明：  这是一个单相并网逆变器双闭环控制，基于采用并网电流外环电容电流内环的方法对其进行稳定性控制，并实现有源阻尼控制。
(This is a single-phase grid-connected inverter double closed-loop control, based on the use of parallel current loop capacitance current loop method to its stability control, and to achieve active damping control.)