太阳能光伏发电系统低频振荡控制技术研究

Research on low frequency oscillation control technology of solar photovoltaic power generation system

目前使用的发电系统振荡控制技术一般只考虑系统的基本运行状态,无法兼顾多种运行状态下外部干扰的影响,导致不同原因的低频振荡产生时控制效果不佳。设计一种太阳能光伏发电系统低频振荡控制技术。分析太阳能发电系统控制结构,计算出光伏电池最大功率电流、最大功率电压以及光伏电池板输出电流,构建太阳能光伏发电系统的模型。利用阻尼控制器作为低频振荡整体控制手段,设计附加阻尼控制器结构,利用蚁群算法得到控制器中的最优参数,实现低频振荡控制。仿真实验中,在负荷突变和光照突变的扰动下分别进行低频振荡控制实验。实验结果表明,设计的低频振荡控制技术能够减少超调,快速完成低频振荡控制,实现发电系统低频振荡的有效控制。

At present,the oscillation control technology of power generation system only considers the basic operation state of the system,and can not take into account the influence of external interference under various operation states,which leads to poor control effect when low-frequency oscillation occurs for different reasons.Therefore,a low-frequency oscillation control technology of solar photovoltaic power generation system is designed.The control structure of solar power generation system is analyzed,the maximum power current,maximum power voltage and output current of photovoltaic panel are calculated,and the model of solar photovoltaic power generation system is constructed.The damping controller is used as the overall control method of low-frequency oscillation,and the structure diagram of additional damping controller is designed.The optimal parameters of the controller are obtained by ant colony algorithm to realize low-frequency oscillation control.In the simulation experiment,the low-frequency oscillation control experiment is carried out under the disturbance of load mutation and illumination mutation.The experimental results show that the designed low-frequency oscillation control technology can reduce the overshoot,quickly complete the low-frequency oscillation control,and realize the effective control of the low-frequency oscillation in the power generation system.