一种评估大规模风电功率脱落对电力系统频率影响的分析方法  

Influence evaluation method on power system frequency dynamics by shedding large scale wind generation

作　　者：崔杨[1] 刘嘉[2] 赵冰[3] 严干贵[1] 

机构地区：[1]东北电力大学电气工程学院,吉林省吉林市132012 [2]中国南方电网广西电网公司南宁供电局,广西南宁530031 [3]国网吉林省电力有限公司长春供电公司,吉林长春130012

出　　处：《电工电能新技术》2014年第12期24-29,共6页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金(51207018);吉林省科技发展计划(20130522174JH)资助项目

摘　　要：大规模并网风电功率的波动会引起系统频率波动甚至导致系统频率动态越限,危及电网的安全运行,而风电单机容量小、随机波动性强等特点,使得基于阶跃扰动的传统频率动态分析方法不再适用。本文提出一种基于风电功率波动特性以及系统频率响应特性的评估方法,可用于分析风电功率波动极端方式——大规模风电功率脱落对电力系统频率动态的影响程度。基于实际电网风电运行实例,分析了并网点受扰后风电机群脱网造成的风电功率脱落引起的系统频率动态过程,并评估了典型运行方式下满足系统容许频差约束的最大风电功率脱落值。The fluctuations of large-scale integrated wind power can destroy the balance of power supply and demand of the power system so that the power system frequency would deviate over the limit.The traditional analysis method of frequency dynamics based on step disturbance is no longer applicable since the small installed capacity of wind turbine and the stochastic fluctuation characteristic of wind power.This paper has proposed a method taking account of both the wind power characteristics and the frequency regulating model of power system,which focused on the impact on frequency influenced by large scale integrated wind farms.The extreme condition of frequency dynamic process has been simulated and analyzed,caused by the all wind farms shedding in one integrated point at the same time.Simulation results shows that the maximum shedding value of wind power is restricted by the permissible deviation of frequency of the tested system.

关 键 词：大规模并网风电 风电功率脱落 电力系统频率 系统容许频差约束 

分 类 号：TM614[电气工程—电力系统及自动化] TM743