摘要
风电渗透率的提高,使电网惯性及相对备用容量降低,对电网负荷频率控制带来新的挑战,风机参与电力系统频率调节的研究为解决上述问题提供了新的途径。首先,基于风机单机模型,提出了快速动能提取的惯性控制方法,并探讨了其与桨距角控制的互补性,通过惯性调整最大化,为减少风机桨距角调节负担提供支持;其次,在电力系统有功缺额及风机调频能力边界分析的基础上,提出了风机桨距角参与调频的驱动策略,旨在降低桨距角参与调频的程度,并减少风机参与调频过程中桨距角调节的次数。仿真结果说明,在满足电网调频要求的情况下,所设计的控制方法可最大限度地减小桨距角调整的幅度及频次,并有效提高电网调频效果。
The increasing wind power penetration reduces the inertia and relative reserve capacity of the smart grid,which brings challenges to load frequency control.In power system frequency regulation,the participation of wind turbine provides a new way to solve this challenge.Firstly,based on the single wind turbine model,an inertial control method is proposed for fast kinetic energy extraction,and its complementarity with the pitch angle control is discussed.Maximum of the inertial adjustment provide support for reducing the burden of the pitch angle regulation.Secondly,on the basis of calculating the active power shortage of the power system and analyzing the boundary of the frequency regulation capability of wind turbine,a conditional driving strategy for the wind turbine pitch angle to participate in the frequency regulation is proposed,aiming at reducing the participation of the wind turbine pitch angle in the frequency regulation,and further reducing the strokes of the wind turbine participation.The simulation results show that the designed control method can maximally reduce the times and amplitudes of the pitch angle adjustment,and improve the grid frequency control effectively.
作者
赵熙临
林震宇
付波
ZHAO Xilin;LIN Zhenyu;FU Bo(School of Electrical&Electronic Engineering,Hubei University of Technology,Wuhan 430068,Hubei Province,China)
出处
《电网技术》
EI
CSCD
北大核心
2020年第9期3450-3457,共8页
Power System Technology
基金
国家自然科学基金项目(61473116,61603127)。
关键词
电网频率
风机有功控制
边界分析
次优功率控制
桨距角控制
power system frequency
active power control of wind turbine
boundary analysis
suboptimal power control
pitch angle control
