摘要
随着新能源装机占比的不断提升,光伏参与调节电网频率成为研究热点。但现有研究以调频效果为目标,凭经验直接给出下垂系数等参数,不具备工程实际上的参考价值。从调频策略和调频技术两个维度对该问题展开研究。以减载运行和附加储能两类调频技术为行文主线、以下垂控制和虚拟惯量控制两类调频策略为研究对象:分别基于传统机组功频静特性和转子运动特性,提出一种设计调频参数的通用方法,并揭示两类调频技术的本质。以贵州某新能源富集地区为例,利用MATLAB/Simulink仿真平台搭建区域电网模型,设计频率超出/未超出光伏调频限度作为仿真工况,并与前人工作对比,验证了所提参数设计方法的准确性和有效性;同时比较两类技术的调频效果发现:相同工况下,附加储能技术调频效果更佳。
With the increasing proportion of installation capacity of new energy,photovoltaic’s participation in grid frequency regula-tion has become a research hotspot.However,the existing research alaways aims at frequency regulation effect,and directly gives parameters such as the droop coefficient based on experience,it lacks practical reference value for engineering.This paper studies the problem from two dimensions:frequency regulation strategy and techology.Taking two frequency regulation technologies of load shedding operation and additional energy storage as the main line of the text,and two frequency regulation strategies of droop control and virtual inertia control as the research objects,a universal method for designing frequency regulation parameters is proposed based on the power frequency static characteristics and rotor motion characteristics of traditional units,and the essence of the two types of frequency regulation technologies is revealed.Taking the power grid of a new energy-rich area in Guizhou as the example,the regional power grid model is built in the MATLAB/Simulink simulation platform,frequency exceed/not exceed the PV frequency regulation limit as the simulation conditions are designed and compared with previous work.The results verify the accuracy and ef-fectiveness of the proposed parametric design methods.At the same time,comparing the frequency modulation effects of the two types of technologies,it is found that in the same scene,the additional energy storage technology can achieve better frequency modula-tion effects.
作者
岳思恺
赵维兴
姚刚
马覃峰
郑絮
吴应双
YUE Sikai;ZHAO Weixing;YAO Gang;MA Qinfeng;ZHENG Xu;WU Yingshuang(School of Electrical Engineering,Guizhou University,Guiyang 550025,China;Zunyi Power Supply Bureau of Guizhou Power Grid Co.,Ltd.,Zunyi,Guizhou 563000,China;Power Dispatching Control Center of Guizhou Power Grid Co.,Ltd.,Guiyang 550002,China)
出处
《南方电网技术》
CSCD
北大核心
2023年第4期77-89,共13页
Southern Power System Technology
基金
国家自然科学基金资助项目(52177221)
中国南方电网有限责任公司科技项目(GZKJXM20210372)。
关键词
光伏调频
下垂控制
虚拟惯量控制
减载运行
附加储能
参数设计
PVs frequency regulation
droop control
virtual inertia control
load shedding operation
additional energy storage
parameter design
