基于转子动能的风电场自适应频率主动支撑控制策略  

Adaptive frequency support control strategy for wind farms based on rotor kinetic energy

作　　者：俞靖一 葛俊 杨铎烔 王鹏宇 程凯 杨苹[3] YU Jingyi;GE Jun;YANG Duotong;WANG Pengyu;CHENG Kai;YANG Ping(Digital Grid Research Institute of China Southern Power Grid,Guangzhou 510700,China;Yangjiang Offshore Wind Energy Laboratory,Yangjiang 529599,China;Guangdong Key Laboratory of Clean Energy Technology,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]南方电网数字电网研究院股份有限公司,广东广州510700 [2]阳江海上风电实验室,广东阳江529599 [3]华南理工大学(广东省绿色能源技术重点实验室),广东广州510641

出　　处：《电力工程技术》2024年第5期131-139,共9页Electric Power Engineering Technology

基　　金：广东省重点领域研发计划资助项目(2021B0101230003)。

摘　　要：随着大规模风电接入电网,电力系统的惯性和抗扰能力逐渐下降,系统的频率稳定问题愈发严峻。为此,文中提出一种基于转子动能的风电场自适应频率主动支撑控制策略。首先,提出一种参与因子,根据风电场的平均转子转速确定风电场参与频率支撑的程度,自适应调整风电场惯性响应参数和频率下垂控制参数。在此基础上,基于风电机组的实时可用转子动能,对风电场的调频功率进行动态分配,风电机组则通过释放转子动能参与频率支撑,其可以充分发挥转子动能较多的机组的频率支撑能力,并避免转速低的风电机组过度参与调频。在频率支撑结束后,采用分阶段的转子转速恢复方法恢复机组转速。仿真结果表明,所提控制策略可以根据风电场的运行状态和风电机组可用转子动能自适应调整有功输出功率,不仅可以实现系统频率的有效支撑,还可以避免频率的二次跌落。With the large-scale integration of wind power into the grid,the inertia and disturbance resistance of the power system are gradually declining,leading to an increasingly prominent frequency stability issue.An adaptive frequency support control strategy for wind farms based on rotor kinetic energy is proposed.Firstly,a participation factor is proposed,which determines the degree of wind farm participation in frequency support based on the average rotor speed of the wind farm and adaptively adjusts the inertia response parameters and frequency droop control parameters of wind farms.Based on the real-time available rotor kinetic energy of wind turbines,the frequency modulation power of wind farms is dynamically allocated.The frequency support ability of wind turbines with more rotor kinetic energy is fully utilized and excessive participation of low-speed wind turbines is avoided in frequency modulation.After the frequency support is completed,a staged rotor speed recovery method is used to restore the rotor speed of the wind turbines.Simulation results show that the proposed strategy can adaptively adjust the active output power based on the operating status of the wind farms and the available rotor kinetic energy of the wind turbines while achieving effective support for the system frequency and avoiding secondary frequency drop.

关 键 词：风电场 转子动能 参与因子 自适应 频率主动支撑 频率二次跌落 

分 类 号：TM614[电气工程—电力系统及自动化]