摘要
为高效利用风机旋转动能,提高风电机组的频率支撑能力,文章在传统下垂控制策略的基础上,提出一种基于改进下垂控制的双馈风电机组频率控制策略。该策略通过结合扰动后电网频率动态特性,提出了可随系统频率变化率(RoCoF)变化的自适应下垂控制系数,在不同扰动下,有效提高风电机组频率支撑能力,改善系统最大频率偏差和最大频率变化率。基于EMTP-RV仿真软件搭建了四机两区域系统模型进行仿真,结果表明,改进后的下垂控制可有效应对不同扰动工况,提高了风电机组频率响应能力,进一步地改善了系统频率稳定性。
To improve the frequency support capability of wind turbine by efficiently utilizing the kinetic energy of wind turbine,a frequency control strategy of the DFIG based on improved droop control is proposed on basic of the conventional droop control.Considering the dynamic frequency characteristics of power system,a droop control coefficient,which can be adaptively adjusted with the rate of change of frequency(RoCoF),is designed to effectively enhance the frequency support capability of DFIG under various disturbances,and further alleviating the maximum frequency deviation and maximum RoCoF.The model of four-machine two-area system is established by EMTP-RV.Simulation results indicate that the improved droop control is able to effectively improve the frequency response capability of wind turbine under different disturbances,and further improve the frequency stability of the power system.
作者
许益恩
张新松
李大祥
张罗玉
陈沛
杨德健
Xu Yien;Zhang Xinsong;Li Daxiang;Zhang Luoyu;Chen Pei;Yang Dejian(College of Electrical Engineering,Nantong University,Nantong 226019,China;College of Electrical Engineering,Northeast Electric Power University,Jilin 132012,China)
出处
《可再生能源》
CAS
CSCD
北大核心
2023年第1期107-113,共7页
Renewable Energy Resources
基金
国家自然科学基金项目(51877112,U2066203)
江苏省高校自然科学基金重大项目(20KJA470002)。
关键词
风力发电
双馈风电机组
频率响应
下垂控制
自适应控制
wind power
doubly-fed induction generator
frequency response
droop control
adaptive control
