并网逆变器功率和合成谐波阻抗联合控制策略

为了抑制电网中因非线性负载和电力电子器件的大量使用而产生的谐波,给出了并网逆变器的给定功率和合成谐波阻抗联合控制策略.该策略能够根据给定的有功功率和无功功率控制系统,并且在电流环电压环上加入了谐波阻抗环.Matlab/Simulink结果显示,该控制策略能够在实现并网逆变器并网的同时起到有效抑制电网谐波的作用.仿真结果表明,此方法能够抑制电流谐波,也使得电网电压谐波得到有效抑制,并避免了电网线路上的谐振.

Combined control strategy of power and synthetic harmonic impedance for grid connected inverter

In order to suppress the harmonics generated by the mass use of nonlinear loads and power electronic devices in the power grid, a combined control strategy of given power and synthetic harmonic impedance for grid connected inverter was proposed. This strategy could control the system according to given active power and reactive power, and the harmonic impedance loop was added to both current loop and voltage loop. The results of Matlab/Simulink simulation show that the proposed control strategy can effectively suppress the power grid harmonics, and realize the grid connection of grid connected inverter at the same time. The simulated results show that the strategy can effectively suppress the current harmonics and voltage harmonics in the power grid, and the resonance on the power grid circuit can be avoided.