时变时滞多区域互联电力系统滑模负荷频率控制方法  

Sliding Mode Load Frequency Control for Interconnected Power Systems with Time-Varying Delayed Multi-Regions

作　　者：肖雄英 杨帆 XIAO Xiongying;YANG Fan(School of Electrical Engineering,Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]上海电力大学电气工程学院,上海200090

出　　处：《上海电力大学学报》2024年第5期397-404,共8页Journal of Shanghai University of Electric Power

基　　金：国家自然科学基金(52377111)。

摘　　要：开放式通信网络在互联电力系统中的普遍使用,使原来专用通道的恒定时滞变成了时变时滞。时变时滞恶化了负荷频率控制(LFC)的动态性能,导致系统频率不稳定,因此提出了一种用于时变时滞多区域互联电力系统的滑模LFC方法,并基于Lyapunov泛函进行了稳定性分析。首先,Caputo型分数阶Lyapunov泛函被引入到稳定性分析,通过调整函数积分的上限,减少了稳定性分析的保守性;然后,结合Lyapunov理论和积分不等式,得到线性矩阵不等式描述的时变时滞电力系统的稳定性条件;最后,通过仿真,验证了所提出的控制策略对LFC动态性能的影响,及对负载扰动和风机功率波动的鲁棒性。The common use of open communication networks in interconnected power systems has turned the constant time delay of the original dedicated channel into the time-varying time delay.The time-varying time delay deteriorates the dynamic performance of load frequency control(LFC)and lead to system frequency instability.Therefore,the sliding mode LFC method for time-varying delayed multi-regions interconnected power systems is proposed and stability analysis is conducted based on the Lyapunov functionals.Firstly,the Caputo-type fractional-order Lyapunov functional is introduced into the stability analysis,and the conservativeness of the stability analysis is reduced by adjusting the upper limit of the function integral;then,the stability conditions of the time varying time delay power system described by the linear matrix inequality are obtained by combining Lyapunov theory and the integral inequality;finally,simulations are conducted to verify the impact of the proposed control strategy on the dynamic performance of the LFC and the robustness to load disturbances and wind power fluctuations.

关 键 词：分数阶Lyapunov泛函 互联电力系统 负载频率控制 稳定性分析 时变时滞 

分 类 号：TM315[电气工程—电机]