Direct-drive wind farm parameter tuning method and system considering the interaction between generators

A direct-drive wind farm parameter tuning system considering the interaction between generators, comprises a data acquisition module, a system stability evaluation module and a parameter optimization module;

• the data acquisition module is used to collect the initial oscillation current of each PMSG port in the direct-driven wind farm;
• the system stability evaluation module is used to, according to the collected data, take a period of the dominant oscillation mode as an iteration period to calculate an overall farm-grid interaction dynamic energy and parameter tuning index of the direct-drive wind farm in the current iteration period;
• obtaining stability level of the direct-drive wind farm based on the overall farm-grid interaction dynamic energy in the current iteration period;
• the parameter optimization module is used to, according to the result of system stability assessment, when the system is unstable, establish an optimization model of key control parameters with the minimum value of the parameter tuning index in the current iteration period as an objective function and the ranges of each key control parameters as the constraint conditions, wherein the key control parameters comprise:
• a current loop proportional gain, a phase-locked loop proportional gain, a grid-connected line inductance, an active current reference value;
• wherein the parameter optimization module is further used to, determine optimal key control parameter values based on the optimization model of the key control parameters, and tune the key control parameters of the direct-drive wind farm according to the optimal key control parameter values.