基于虚拟同步机技术的风储系统协调调频控制策略  

Coordinated Frequency Modulation Control Strategy of Wind Farm-Storage System Based on Virtual Synchronous Generator Technology

作　　者：张冠锋 杨俊友[1] 王海鑫[1] 谢赐戬 付尧 Zhang Guanfeng;Yang Junyou;Wang Haixin;Xie Cijian;Fu Yao(School of Electrical Engineering Shenyang University of Technology,Shenyang 110870 China;Liaoning Dongke Power Co.Ltd,Shenyang 110003 China)

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870 [2]辽宁东科电力有限公司,沈阳110003

出　　处：《电工技术学报》2022年第S01期83-92,共10页Transactions of China Electrotechnical Society

基　　金：辽宁省教育厅科学研究经费项目(LQGD2019005);辽宁省科协科技创新智库项目(LNKX2020ZD03)资助

摘　　要：为了充分发掘风电机组调频能力,考虑传统储能系统直接补偿风电场二次频率跌落调频控制策略存在储能系统容量需求高、经济性差的缺点,该文提出一种基于虚拟同步机(VSG)技术的风储系统协调调频控制策略。首先,在风储VSG系统结构基础上建立风储VSG数学模型,并分析风储VSG调频特性;其次,依据储能系统数学模型研究储能系统VSG调频控制方法;然后,综合考虑风电场与储能系统出力特点,提出基于风电惯量释放和储能稳态支撑的风储协调控制策略,通过风电场与储能系统并行出力的方式,在降低储能系统容量需求的同时充分发挥风电机组短时功率支撑的作用;最后,通过仿真分析可知,采用该文控制策略可在稳定系统频率的基础上大幅降低储能系统容量配置,提高风电场调频经济性。In order to fully explore the frequency regulation capability of wind turbine and consider the shortcomings of traditional frequency modulation control strategy that the energy storage system(ESS)directly compensates the wind farm's secondary frequency drop,such as the high ESS capacity requirements and poor economy,a coordinated frequency regulation control strategy based on virtual synchronous generator(VSG)technology is proposed by the paper.Firstly,based on the structure of wind farm-ESS VSG system,the mathematical model of wind farm-ESS VSG is established,and the frequency modulation characteristics of wind storage VSG are analyzed.Secondly,according to the mathematical model of ESS,the state of charge(SOC)is considered.Then,considering the output characteristics of wind farm and ESS,a coordinated control strategy based on wind power inertia release and ESS steady-state support is proposed.By means of parallel output of wind farm and ESS,the short-term power support function of wind turbine can be brought into full play and the capacity demand of ESS is reduced.The simulation results show that the control strategy in the paper can greatly reduce the capacity configuration of ESS and improve the efficiency of wind farm frequency modulation on the basis of stabilizing the system frequency.

关 键 词：虚拟同步机 风储联合 风电惯性释放 储能稳态支撑 

分 类 号：TM734[电气工程—电力系统及自动化]