计及需求侧资源主动响应的含风电互联系统负荷频率控制

Load Frequency Control of Wind Power Interconnected System Considering Active Response of Demand Side Resources

中国正在构建以新能源为主体的新型电力系统,该系统相较于传统电力系统在电源侧和负荷侧具有双随机波动特性,挖掘并提升系统中灵活资源的主动响应能力是保障新型电力系统安全稳定运行的重要手段。以空调类需求侧资源为例,建立了计及需求侧资源主动响应的含风电互联系统负荷频率控制模型;并综合考虑系统电源侧和负荷侧的双随机特性,设计了可最大化需求侧主动响应能力的线性自抗扰控制策略;最后,以某区域电力系统为例,仿真测试了不同风电渗透率下风电场功率波动、负载扰动等多组场景下的控制效果。结果表明:所提策略显著提升了含风电互联系统的负荷频率控制性能,为大规模新能源电力并网提供了有力支撑。

In China,a new power system with new energy as the main body is being built.Compared with the traditional power system,a double random fluctuation characteristic appears on the power supply side and load side.In order to ensure the safe and stable operation of the new power system,it is very important to mine and improve the active response ability of flexible resources in the system.Air conditioning demand side resources was taken as an example.And a load frequency control model of wind power interconnected system considering the active response of demand side resources was established.Considering the double random characteristics of power supply side and load side,a linear active disturbance rejection control strategy was designed to maximize the active response ability of demand side.Finally,a regional power system was taken as an example to simulate and test the control effect of wind farm power fluctuation and load disturbance under different wind power permeability.The results show that the proposed strategy significantly improves the load frequency control performance of wind power interconnected system and provides strong support for large-scale new energy power grid connection.