三相Z源并网逆变器无电网电压传感器控制

Voltage-sensor-less control of three-phase Z-source grid-connected inverter

将虚拟磁链技术应用到三相Z源并网逆变器控制系统中,结合三相Z源并网逆变器的数学模型,建立了考虑直通占空比影响的电网虚拟磁链观测模型,提出了基于虚拟磁链定向的Z源并网逆变器控制策略。仿真结果证实了理论分析的正确性和控制策略的有效性。

Virtual flux technology was applied in control system of the novel three-phase Z-soume inverter. Combining the mathematical model of three-phase Z-source grid-connected inverter and thinking over shoot-through duty ratio influence, the virtual flux estimation model was established. The virtual flux-based control strategy of three--phase Z-source grid-connected inverter was proposed. Simulation results verify the correctness of theoretical analysis and the validity of control method.