摘要
传统线型PID控制方式会导致光伏发电并网点电压出现大幅度波动。为了克服此问题,提出基于线性自抗扰控制的光伏发电波动性消除方法。通过组建光伏发电系统的“抗扰范式”模型,引入频率尺度变换,设计线性扩张状态观测器,然后输出变量进行转换,采用比例微积分控制器进行控制,通过线性自抗扰控制技术实现参数整定,获取最优参数,完成光伏发电波动性消除。仿真实验结果表明,加入LADRC控制时的A相电压在790 V^810 V可控范围内波动较小,输出电流较稳定。所提的基于线性自抗扰控制的光伏发电波动性消除方法,能够有效降低光伏发电单元输出的有功功率,提高了执行效率。
The traditional linear PID control method will lead to the voltage fluctuation of photovoltaic power grid.A method of eliminating the fluctuation of photovoltaic power generation based on linear active disturbance rejection control is proposed to effectively solve the above problem.By establishing the“disturbance rejection normal form”model of photovoltaic power generation system,introducing frequency scale transformation,the linear extended state observer is designed.The output of linear extended state observer is converted,and the proportional calculus controller is used for control.The parameter tuning is realized by linear active disturbance rejection control technology to obtain the optimal parameters,so as to eliminate the fluctuation of photovoltaic power generation.The simulation results show that the A-phase voltage with LADRC control is in the controllable range of 790 V^810 V,and the output current is stable.The method of eliminating fluctuation of photovoltaic generation based on linear auto-disturbance control can effectively reduce the output active power of photovoltaic power generation unit and improve the execution efficiency.
作者
邹鹏辉
ZOU Peng-hui(SPIC Qinghai Photovoltaic Industry Innovation Center Co.,Ltd.,Xining 810008,China)
出处
《电力学报》
2020年第6期507-514,共8页
Journal of Electric Power
关键词
线性自抗扰
光伏发电
波动性消除
扩张状态观测器
linear active disturbance rejection
photovoltaic power generation
volatility elimination
extended state observer
