Grid-connected control method for new energy inverter based on single chip micyoco Online publication date: Fri, 15-Oct-2021
by Ming-fei Qu; Nan Chen; Yong-qi Liu
International Journal of Critical Infrastructures (IJCIS), Vol. 17, No. 3, 2021
Abstract: In order to solve the problem of the output oscillation of the new energy power system when switching the inverter mode and affecting the stability of the new energy power system, this paper proposes a grid-connected control method for new energy inverter based on single chip micyoco. The block diagram of the seamless switch control of the inverter and the mathematical model of the LCL filter are established, and the relationship between the inductance of the power grid, the filter capacitance and the inductance of the rectifying side is determined. Through the operation of two modes of island grid-connected and island grid-connected voltage regulation, the seamless switching control of the new energy inverter is realised. The experimental results show that this method can effectively suppress the transient shock caused by the switching of grid-connection mode and improve the stability of the new energy power generation system.
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