摘要
【目的】风电的大规模渗透一定程度上降低了电力系统的调频能力,储能作为一种相对成熟、行之有效的技术手段,被广泛用于电网调频。为此,研究了储能系统在虚拟同步机控制下参与电网调频的响应过程及优化配置。【方法】基于DIgSILENT/PowerFactory仿真软件搭建储能控制模型与电力系统,对系统投入储能前后的频率响应特性进行分析。进一步,考虑风电机组在不同出力模式下的备用容量,通过风速区间的划分与风电机组功率预留系数的确定,优化储能系统的配置结果,实现储能系统调频系数的自适应调整。【结果】储能的投入能够有效改善系统频率响应、减少弃风。通过合理预留风电机组自身调频容量,储能系统可以为电网提供可靠的功率支撑。【结论】基于风机风速与输出功率的储能系统调频系数自适应调整方法,能够在满足系统调频需求的同时有效减小储能系统的超调量和输出功率,延长储能工作时间。
[Objectives]The large-scale penetration of wind power has reduced the frequency regulation capability of the power system to a certain extent.As a relatively mature and effective technical means,the energy storage system is widely used in power grid frequency regulation.Therefore,the response process and optimal configuration of energy storage system(ESS)participating in power grid frequency regulation under the control of virtual synchronous generator were studied.[Methods]Based on the simulation software DIgSILENT/PowerFactory,an ESS control model and typical power system were constructed to analyze the frequency response characteristics of the grid before and after the ESS participation.Furthermore,considering the reserve capacity of wind turbines under different output modes,the configuration results of the ESS were optimized by dividing the wind speed range and determining the wind turbine power reserve coefficient,so as to realize the adaptive adjustment of the frequency regulation coefficient of the ESS.[Results]The investment of the ESS can effectively improve the frequency response and reduce wind curtailment of the system.By reserving the frequency regulation capacity of wind turbines reasonably,the ESS can provide reliable power support for the power grid.[Conclusions]The self-adaptive adjustment method of the frequency regulation coefficient of the ESS based on the wind speed and the output power of fans can effectively reduce the overshoot and the output power of the ESS while meeting the frequency regulation requirements,thereby extending the working time.
作者
张崇
李博
李笑宇
刘洪波
刘永发
ZHANG Chong;LI Bo;LI Xiaoyu;LIU Hongbo;LIU Yongfa(State Grid Tianjin Electric Power Company Binhai Power Supply Branch,Binhai New Area,Tianjin 300450,China;StateGrid Dandong Power Supply Company,Dandong 118000,Liaoning Province,China;School of Electrical Engineering,Northeast Electric Power University,Jilin 132000,Jilin Province,China)
出处
《发电技术》
CSCD
2024年第4期772-780,共9页
Power Generation Technology
基金
国家重点研发计划项目(2017YFB0902000)。
关键词
双碳
储能
新能源
风电
虚拟同步机
频率响应
调频
double carbon
energy storage
new energy
wind power
virtual synchronous generator
frequency response
frequency regulation
