风储联合系统主动参与电网一次调频的协调控制策略  

Coordinated control strategy of primary frequency regulation of power grid with actively participating combined wind-storage system

作　　者：朱颜 王渝红[1] 廖建权 郑宗生 赏成波 王强钢[2] ZHU Yan;WANG Yuhong;LIAO Jianquan;ZHENG Zongsheng;SHANG Chengbo;WANG Qianggang(College of Electrical Engineering,Sichuan University,Chengdu 610065,China;State Key Laboratory of Power Transmission Equipment Technology(Chongqing University),Chongqing 400044,China)

机构地区：[1]四川大学电气工程学院,四川成都610065 [2]输变电装备技术全国重点实验室(重庆大学),重庆400044

出　　处：《电工电能新技术》2024年第5期10-18,共9页Advanced Technology of Electrical Engineering and Energy

基　　金：国家重点研发计划项目(2021YFB2400800)。

摘　　要：通过风储联合系统的协调控制增强风电并网系统的转动惯量水平是增强系统频率稳定的重要手段。现有风储联合系统协调控制中风电与储能的控制相对独立,两者的耦合集成度较低,难以充分发挥风电和储能对频率扰动的响应和调节能力。对此,本文提出基于线性二次型调节器(LQR)的风储联合系统协调控制策略。该策略以双馈风机输出频率和风储联合系统总输出功率为储能的控制输入,以提升系统的阻尼和稳定性,并增强系统的频率响应调节能力。首先,根据系统的状态方程建立双馈风机和风储联合系统的小信号稳定模型,分析协调控制对风储联合系统的阻尼比的提升作用;其次,由具有扰动抑制能力的LQR方法确定协调控制的控制参数;在此基础上,根据转子动能确定储能功率容量;最后在Matlab/Simulink仿真平台搭建风储联合系统并网模型,验证了本文所提策略的有效性和优越性。Enhancing the rotational inertia level of the wind power grid-connected system through the coordinated control of the wind-storage combined system(WSCS)is an important means to enhance the frequency stability of the system.The coupling degree of WSCS is low,and it is difficult to give full play to the response and adjustment capabilities of wind power and energy storage to frequency disturbances.In this regard,this paper proposes a coordinated control strategy for the WSCS based on the Linear Quadratic Regulator(LQR).This strategy takes the output frequency of the DFIG and the total output power of the WSCS as the control input of the energy storage to improve the damping and stability of the system and enhance the frequency response adjustment capability of the system.Firstly,according to the state equation of the system,the small-signal stability model of the DFIG and the WSCS is established,and the effect of coordinated control on the damping ratio of WSCS is analyzed.On this basis,the energy storage power capacity is determined according to the maximum rotor kinetic energy released by the synchronous generator.Finally,the grid-connected model of the WSCS is built in Matlab/Simulink,which verifies the effectiveness and superiority of the strategy.

关 键 词：风电 储能 协调控制 调频 LQR控制 

分 类 号：TM732[电气工程—电力系统及自动化]