【摘要】 由于电网中光伏发电部分越来越高,光伏出力具有不确定性、突发性和干扰多等缺点对电网的稳定性能产生严重破坏。针对参数摄动对光伏发电系统影响,为优化光伏输出的稳定性,提出将鲁棒优化理论引入到光伏发电系统逆变器输出的电压电流控制中。在进行系统建模的基础上,通过建立状态空间方程,转换到S域内的传递函数,对控制输出信号运用H_∞鲁棒控制策略,并应用到该系统中。结果证明此设计方法得到的输出波形达到电网要求。更多还原

【Abstract】 With the proportion of photovoltaic power generation becoming more and more in the power grid,the output of photovoltaic power generation has the characteristics of random,intermittent and volatility,which will affect the stability of power system. Aiming at the influence on photovoltaic power generation systems which result from parameter perturbation,in order to optimize the stability of photovoltaic output,the robust optimization theory was put forward,which was introduced into the control of photovoltaic inverter output voltage and current in power generation system. By modeling the system of Z source inverter photovoltaic power generation,through the establishment of the state space equation,the system was transformed to the domain of the S function. By using H∞ robust control strategy,the controller was designed by simulation,then applied to the system of photovoltaic power generation. The results of simulation verify the feasibility and effectiveness of the proposed method in H∞ robust control.更多还原