风火打捆系统中单机聚合对详细模型SSO的影响  

Influence of single machine aggregation on detailed model SSO of wind-thermal bundled system

作　　者：苏勋文 崔含晴 裴禹铭 安鹏宇 Su Xunwen;Cui Hanqing;Pei Yuming;An Pengyu(School of Electrical & Control Engineering, Heilongjiang University of Science & Technology, Harbin 150022, China)

机构地区：[1]黑龙江科技大学电气与控制工程学院,哈尔滨150022

出　　处：《黑龙江科技大学学报》2021年第2期216-222,共7页Journal of Heilongjiang University of Science And Technology

基　　金：国家自然科学基金项目(51677057);黑龙江省教育厅省属高校科技成果研发、培育、转化支持计划项(TSTAU-R201805)。

摘　　要：为研究风火打捆系统中双馈风机(DFIG)单机聚合是否对火电机组次同步振荡(SSO)产生影响,推导了DFIG输出有功功率对火电机组电气阻尼系数表达式,根据IEEE第一标准模型建立了风火打捆系统多机详细模型及聚合模型,采用复转矩系数分析法分析了两个算例在风机运行状态相同及风机间有风速差异的振荡频率,通过时域仿真验证其准确性。结果表明,两种工况下聚合前后对应的振荡频率一致,均为32 Hz,但聚合后电气阻尼系数值略有增加。研究风火打捆系统SSO的影响因素时,可采用聚合模型以提高仿真效率。This paper aims to investigate whether the single unit aggregation of doubly-fed induction generator(DFIG)-based wind farm in the wind-thermal bundled system has influence on the sub-synchronous oscillation(SSO)of thermal power units.The study involves deriving the function of electrical damping coefficient of DFIG output active power and then developing the detailed model and aggregated model of wind-fire bundling system based on the first standard model of IEEE;and analyzing the two examples under the same operation state and different wind speed between fans using the complex torque coefficient analysis method and verifying the accuracy by time domain simulation.The results show that the oscillation frequency with and without aggregation is consistent at 32 Hz under the two working conditions,but the electrical damping coefficient increases slightly after aggregation.When it comes to study the influencing factors of wind-fire bundling system SSO,the aggregated model allows simulation efficiency to be improved.

关 键 词：风机 风火打捆 次同步振荡 复转矩系数分析法 电气阻尼 聚合模型 

分 类 号：TM614[电气工程—电力系统及自动化] TM712