基于线性自抗扰控制的V2G负荷频率控制

Load Frequency Control Considering Vehicle to Grid Based on Linear Active Disturbance Rejection Control

电动汽车的电池作为一种可控性的储能单元,可作为可移动的分布式电源为电网提供可调度容量,辅助参与电网的负荷频率控制（LFC）。计及电动汽车入网（V2G）的电力系统结构复杂,受诸多系统不确定性因素的影响,存在电力系统建模不精确,抗干扰要求高等问题。为了提高电力系统的稳定性与准确性,提出了一种线性自抗扰控制（LADRC）方法,应用到计及电动汽车入网的负荷频率控制中。仿真结果表明,与传统PI控制方法相比,改进的控制方法可以更有效地控制负荷频率,控制更精确,鲁棒性更好,抗干扰性更强。

The battery of electric vehicle is a kind of controllable energy storage unit, which can be used as a movable distributed power source to provide dispatchable capacity for the power grid and participate in the load frequency control（LFC） of power grid adjunctively. The structure of the power system considering electric vehicle to grid（V2 G） is complex, which is affected by so many uncertainties, such as, imprecise information existing in the modeling of the power system, high anti-interference expection etc. In order to improve the stability and accuracy of the power system, a linear active disturbance rejection control（LADRC） method is proposed, which is applied to the LFC of V2 G. The simulation results show that, compared with the traditional PI control method, the improved control method, not only can control LFC more effectively and accurately, but also, has better robustness and anti-interference.