含荷电状态修正和通信延迟的储能电站负荷频率鲁棒控制

针对储能电站参与调频时与传统机组的协调问题及通信延迟产生的影响,设计了一种含荷电状态(SOC)修正和通信延迟的储能电站负荷频率鲁棒控制方法.首先,在储能电站参与频率控制过程设计SOC回归修正环节与传统机组进行协调而实现SOC裕度调节,同时考虑协调过程存在通信延迟问题,建立含储能电站SOC回归修正的区域电网延迟系统模型.其次,考虑通信延迟对于系统控制性能的影响,在负荷频率控制系统延迟边际计算的基础上,设计储能电站负荷频率控制的系统鲁棒控制器,对可再生能源功率扰动进行抑制并实现系统频率的快速恢复与偏差调节.最后,基于MATLAB/Simulink平台对负荷频率控制系统进行仿真验证,结果证明了所提方法的有效性.

Load-frequency Robust Control for Energy Storage Power Station Considering Correction of State of Charge and Communication Delay

To solve the coordination problems between energy storage power stations when participating in frequency regulation and traditional units and the influence of communication delay, this paper designs a load frequency robust control method for energy storage power station considering the correction of state of charge and communication delay. Firstly, the regression and amendment link of state of charge (SOC) is designed to coordinate with traditional units when the energy storage power station participates in the frequency control to realize the SOC margin adjustment. Then, considering the effect of communication delay, this paper designs a delay system model of regional power grids with regression and correction of SOC in energy storage power stations. Secondly, considering the impact of communication delay on design performance of system control, the system robust controller is designed for load frequency control of energy storage power stations based on the delayed marginal calculation of the load frequency control system to restrain power disturbance of renewable energy sources and realize the quick recovery of system frequency. Finally, the simulation of the load frequency control system is implemented in the MATLAB/Simulink platform, and the validity of the proposed strategy is verified.