基于寻优算法的风电并网变流器控制参数辨识方法

Control Parameter Identification Method of Wind Power Grid-Connected Converter Based on Optimization Algorithm

为使风电并网过程中电流、电压、频率、相位等参数保持一致,提高风电并网安全性和稳定性,提出一种基于寻优算法的风电并网变流器控制参数辨识方法。建立风电并网变流器控制模型,根据电力电压支撑情况变更PI(Proportional Integral)调节器的功率控制指令。利用微分函数方程,设置PI调节器控制条件,计算复频域的函数关系,明确调节积分系数逻辑关系。通过控制传递函数得出控制参数的可辨识性,分析参数控制输出值以及特性数据,最终完成控制参数的寻优辨识结果。实验结果表明,所提方法在多种环境下均能完成控制参数的辨识,辨识误差小,准确度高。

In order to maintain the consistency of parameters such as current,voltage,frequency,and phase during wind power grid connection,and to improve the safety and stability of wind power grid connection,a method for identifying control parameters of wind power grid connected converters based on optimization algorithms is proposed.The control model is established for the wind power grid connected converter,and the power control command of the PI(Proportional Integral)regulator is changed based on the power voltage support.Using differential function equations,to set the control conditions of the PI regulator,to calculate the functional relationship in the complex frequency domain,and to clarify the logical relationship between the adjustment integral coefficients.The identifiability of the control parameters is obtained through the control transfer function,and the parameter control output value and characteristic data are analyzed.Finally,the optimization and identification results of the control parameters are completed.The experimental results show that the proposed method can complete the identification of control parameters in various environments,with small identification error and high accuracy.