摘要
针对光伏机组受光照辐射度等外部环境影响导致的输出功率强波动性,以及传统控制方法在系统大扰动时易引发退网事故等问题,提出了基于级联线性-非线性扩展状态观测器(ESO)自抗扰的光储混合系统控制策略。构建光储混合系统模型实现了储能单元间的高低频功率分配,采用级联线性-非线性ESO的自抗扰控制实时估计并补偿系统扰动。仿真结果验证了所提控制策略的有效性。
Due to the influence of external uncertainties such as light intensity and light time,the output of photovoltaic units has strong volatility and randomness,and it is difficult to provide stable active power support.When the photovoltaic unit adopts the traditional active standby tracking photovoltaic control strategy,it is easy to cause an out-of-grid accident when the system is subjected to a large disturbance.The optical storage system under virtual synchronous generator control still has shortcomings in small disturbance tracking and large disturbance suppression.Therefore,a control strategy for solar storage hybrid system based on linear-nonlinear cascaded extended state observer(ESO)is proposed in this paper.Firstly,a solar storage hybrid system model is constructed to realize the coordinated distribution of high-low frequency power among multiple energy storage units.Secondly,a linear-nonlinear cascaded ESO is used to estimate and compensate the disturbance in real time,which realizes the stable and effective frequency processing under different scale disturbance.Simulation results verify the effectiveness of the proposed control strategy.
作者
余少琪
巩伟峥
陈梦滢
施宇帆
姚寅
YU Shaoqi;GONG Weizheng;CHEN Mengying;SHI Yufan;YAO Yin(East Subsection of State Grid Corporation of China,Shanghai200120,China;Shanghai University of Electric Power,Shanghai200090,China)
出处
《上海电力大学学报》
2025年第4期325-332,共8页
Journal of Shanghai University of Electric Power
基金
国家电网科技项目(SGHD0000DKJS2400351)。
关键词
光伏储能混合系统
扩展状态观测器
频率响应
控制策略
solar storage hybrid system
extended state observer
frequency response
control strategy
