摘要
提出一种功率分配型虚拟直流发电机(VDCG)控制策略,使光伏变换器具备直流发电机惯性和阻尼。建立光伏变换器下垂控制与VDCG控制小信号模型,利用阻抗比判据对两种控制策略小信号稳定性进行对比分析,仿真和实验结果表明VDCG控制具有较强小信号稳定性,验证了该控制策略的可行性。
A power distribution virtual direct current generator(VDCG) control strategy is proposed to make the photovoltaic converter possess the inertia and damping of the DC generator.The small signal model of photovoltaic converter droop control and VDCG control is established and the small signal stability of the two control strategies is compared and analyzed by the criterion of impedance ratio.The simulation and experimental results show that the VDCG control has stronger small signal stability and the feasibility of the control strategy is verified.
引文
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