双环控制，直流母线电压外环，电感电流内环预测控制，3kW光伏并网系统，无升压电路，增量电导法，逆变桥控制最大功率追踪，亲测可用。(DC bus voltage outer loop, inductance current inner loop, 3KW photovoltaic grid connected system, no boost circuit, incremental conductance method, inverter bridge control maximum power