计及电动汽车与飞轮储能单元的孤岛微电网负荷频率控制

Load Frequency Control of Islanded Microgrids Considering Electric Vehicles and Flywheel Energy Storage Units

针对孤岛微电网惯性和阻尼不足的问题,引入飞轮储能单元,并构建带飞轮储能单元的孤岛微电网负荷频率控制模型,研究了通信时滞对孤岛微电网系统的影响。采用适用的Lyaunov-Krasovskii泛函(LKF),通过广义自由权积分不等式对导数积分项进行界定,从而得到了时滞相关稳定性判据。当考虑电动汽车电池状态对系统增益的影响时,将系统视为参数不确定时滞系统。通过不同的参数设定,进行了仿真实验,结果证明了所提方法的有效性与优越性。

In view of the insufficient inertia and damping in islanded microgrids,flywheel energy storage units have been introduced,followed by the construction of a load frequency control model for an isolated microgrids with flywheel energy storage units,with a focus on the impact of communication delay on islanded microgrid systems.The applicable Lyaunov Krasovski functional(LKF)has been adopted for the definition of the derivative integral term through the generalized free weight integral inequality,thus obtaining a delay related stability criterion.When considering the impact of electric vehicle battery state on system gains,the system is treated as a parameter uncertain time-delay system.Based on different parameter settings,simulation experiments are conducted,with the results verifying the effectiveness and superiority of the method proposed in this paper.