中国电机工程学报2017，Vol.37Issue(11)：3162-3173,12.DOI:10.13334/j.0258-8013.pcsee.160857
考虑PLL和接入电网强度影响的双馈风机小干扰稳定性分析与控制
Small Signal Stability Analysis and Control of Double-Fed Induction Generator Considering Influence of PLL and Power Grid Strength
摘要
Abstract
Wind power accidents occurred in the world show that wind power delivered by a long-distance transmission line system will be excited power oscillations with frequency in range from several tens to hundreds Hz by disturbances.Moreover,this oscillation reason cannot be able to fully explain by the small signal oscillation theory of synchronous generator.Since the wind turbine mainly realizes the coupling between itself and power grid through the phase-locked loop (PLL),the dynamic characteristics of the PLL will seriously affect the small signal stability of power system.This paper established a single double-fed induction generator (DFIG) infinity-bus model considering the dynamic characteristics of PLL,and analyzed the characteristics of small signal stability under different operating conditions and various power grid strengths.The analysis results show that:PLL oscillation is the main reason leading to small signal instability of a weak power system grid integration of wind power.Finally,a damping controller based on phase compensation was proposed to suppress oscillation instability problem.Simulation results verify the validity of the analysis results and proposed damping controller.关键词
双馈风机/小干扰稳定/锁相环/功率振荡/电网强度/阻尼控制器Key words
DFIG/small signal stability analysis/phase-locked loop (PLL)/power oscillation/power grid strength/damping controller分类
信息技术与安全科学引用本文复制引用
刘巨,姚伟,文劲宇..考虑PLL和接入电网强度影响的双馈风机小干扰稳定性分析与控制[J].中国电机工程学报,2017,37(11):3162-3173,12.基金项目
国家重点基础研究发展计划项目(973项目)(2012CB215106) （973项目）
国家自然科学基金项目(51577075).The National Basic Research Program of China (973 Program) (2012CB215106) （51577075）
Project Supported by National Natural Science Foundation of China (51577075). （51577075）
