Study on Offshore Wind Power Converter Modeling and Power Stability Improvement

With the rapid development of offshore wind power, the high permeability of renewable energy reduces the short circuit capacity of the system, and the stable operation of renewable energy grid connection has become the key factor in the development of future power system. At present, the wind turbine is basically connected to the grid through the grid side converter, and the grid control strategy has a high dependence on the voltage stability and short circuit capacity of the connection point due to its phase-locked characteristics. Therefore, this paper studies the effect of the optimized control strategy and the grid-forming control strategy to improve the grid stability of renewable system under the weak grid. Optimizing the phase-locked loop of the grid converter can improve the stability of renewable system under the weak grid, grid-forming control strategy has the best effect on improving the stability of renewable system under weak grid.