避免频率二次跌落的风电场一次调频功率分配方法  

A method of primary frequency regulation power distribution in a wind farm to avoid secondary frequency drop

作　　者：何廷一 孙领 王晨光 李胜男 李崇涛[2] 陈亦平[3] HE Tingyi;SUN Ling;WANG Chenguang;LI Shengnan;LI Chongtao;CHEN Yiping(Electric Power Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming 650217,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Dispatching and Control Center of China Southern Power Grid,Guangzhou 510623,China)

机构地区：[1]云南电网公司电力科学研究院,云南昆明650217 [2]西安交通大学电气工程学院,陕西西安710049 [3]中国南方电网电力调度控制中心,广东广州510623

出　　处：《电力系统保护与控制》2022年第11期12-20,共9页Power System Protection and Control

基　　金：国家自然科学基金面上项目资助(51977167);云南电网公司科技项目资助(YNKJXM20191240)。

摘　　要：风电场基于下垂控制参与系统一次调频时,参数整定不当可能引发机组转速保护动作进而带来频率二次跌落问题。为此,提出了一种避免频率二次跌落的风电场一次调频功率分配方法。首先结合下垂控制的响应过程分析了转速保护动作带来频率二次跌落问题的物理机理,然后基于转速及功率约束条件提出了风电机组调频功率评估方法,进而得到风电场的调频功率评估方法和风电场一次调频功率分配方法。基于Matlab/Simulink搭建了含有风电场的仿真模型。仿真结果表明,所提方法可充分发挥风电机组的调频能力,并避免频率二次跌落问题。Improper parameter setting may initiate a wind turbine speed protection action and then lead to a problem of secondary frequency drop,when a wind farm participates in primary frequency regulation based on droop control.Therefore,a method of primary frequency regulation power distribution in a wind farm to avoid secondary frequency drop is proposed.First,the physical mechanism of secondary frequency drop caused by the speed protection action is analyzed based on the response process of droop control.Then an evaluation method of wind turbine frequency regulation power is proposed considering the wind turbine speed and power limits.Then the evaluation method of wind farm frequency regulation power and the method of primary frequency regulation power distribution in a wind farm are obtained.A simulation model including a wind farm is established in Matlab/Simulink.The simulation results show that the proposed method could give full play to the frequency regulation capability of wind turbines and avoid the problem of secondary frequency drop.

关 键 词：下垂控制 一次调频 频率二次跌落 调频功率评估 功率分配 

分 类 号：TM614[电气工程—电力系统及自动化]