Grid-connected wind turbine group impedance modeling and resonance analysis

Resonance of Wind power grid is one of the key components for global system resonance. It is a potential threat for power system stable operation. Based on wind grid resonance principle, the grid-connected inverter impedance model is proposed to analysis the resonance of grid-connected wind turbine group. An actual wind farm model and parameters are modeled in MATLAB to calculate the resonance of grid-connected wind turbine group. The impact of wind turbine units number and output power on the resonant characteristics can be analyzed. The correctness of theoretical analysis and effectiveness of the resonance analysis model is supported by experimental results. This is of guiding significance for resonance adjustment of running wind turbines group and grid-connected inverter design.