风力发电对系统频率影响及虚拟惯量综合控制  

Impact of Wind Power on Power System Frequency and Combined Virtual Inertia Control

作　　者：李少林[1,2] 王伟胜 张兴 秦世耀[2] 谢震 王瑞明[2] LI Shaolin;WANG Weisheng;ZHANG Xing;QIN Shiyao;XIE Zhen;WANG Ruiming(School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China;State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems (China Electric Power Research Institute), Beijing 100192, China)

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽省合肥市230009 [2]新能源与储能运行控制国家重点实验室(中国电力科学研究院有限公司),北京市100192

出　　处：《电力系统自动化》2019年第15期64-70,共7页Automation of Electric Power Systems

基　　金：国家重点研发计划资助项目(2018YFB090402);国家电网公司科技项目(NYB17201700151)~~

摘　　要：针对大规模风电接入引起系统等效转动惯量下降、系统频率稳定风险上升的问题,在分析电力系统调频过程与风电常规虚拟惯量调频的基础上,建立了含风电的电力系统频率动态响应模型,研究了风电及调频参数对系统频率动态特性的影响及变化规律。提出了基于选择函数的风电机组新型虚拟惯量综合控制方法,利用有限风电机组转子动能,有效增加了系统等效转动惯量,同时避免了传统控制所造成的功率二次跌落。在MATLAB/Simulink中建立了系统仿真模型,仿真验证了控制策略有效性及对频率动态特性的改善作用。The high level of wind power penetration has reduced the system equivalent moment of inertia and challenged the frequency stability of power grid.Firstly,this paper reviews and analyzes the frequency regulation process of power system and conventional virtual inertia control of wind turbine.Then,a dynamic frequency response model of power system with wind power is established.The impact and variation of wind power and its frequency regulation parameters on dynamic characteristics of system frequency are studied.Furthermore,a novel combined virtual inertia control scheme for the wind turbine based on the selection function is proposed.The limited rotor kinetic energy of the wind turbine is utilized to increase the system equivalent moment of inertia effectively,and the secondary power drop caused by the conventional control is avoided.Finally,a simulation model is established in MATLAB/Simulink,and the simulation results verify the effectiveness of proposed control strategy and the improvement on the dynamic characteristics of power system frequency.

关 键 词：风力发电 等效转动惯量 转子动能 虚拟惯量 综合控制 

分 类 号：TM614[电气工程—电力系统及自动化]