近海可再生能源综合发电场的非机理等效建模

Non-mechanism equivalent modeling of hybrid offshore renewable energy conversion farm

为了建立准确的近海可再生能源综合发电场等效模型,提出了非机理建模方法。基于传递函数建立非机理等效模型,描述输入、输出的非线性关系。提出解耦参数辨识方式,并运用蚁群算法进行参数辨识。在Matlab/Simulink中搭建由风力发电机组、潮流发电机组和波浪发电机组组成的近海可再生能源综合发电场的相量模型,采集发电场模型在风速、潮流流速、波浪以及电压扰动影响下的输入输出数据。根据输入、输出数据建立传递函数模型,辨识模型参数,根据所得参数计算等效模型输出。等效模型输出与仿真模型输出的误差较小,验证了非机理等效建模方法在近海可再生能源综合发电场建模中的可行性。

In order to establish an accurate equivalent model of a hybrid offshore renewable energy conversion farm, a non-mechanism equivalent modeling method is proposed. Based on transfer functions, a non-mechanism equivalent model was developed to describe the nonlinear relation between inputs and outputs. Then the decoupling parameter identification method was applied to the model, and parameters of transfer functions were identified using the ant colony algorithm. Furthermore, a phasor model of a hybrid offshore renewable energy conversion farm, consisting of wind, tidal, and wave turbines, was built in Matlab/Simulink. With the model, the input and output data of the farm were acquired under the influences of wind, tidal, wave, and voltage disturbances. Finally, a transfer function model was built based on the collected data, and model parameters were identified. With the obtained parameters, the outputs of the equivalent model were calculated. The error between outputs of the equivalent model and the simulation model is very small, verifying the feasibility of the non-mechanism equivalent model in building the hybrid offshore renewable energy conversion farm.