文章摘要
张榴晨,吴文晗,茆美琴.基于PIR控制器的电流源型永磁直驱风力发电系统低电压穿越控制[J].电力系统自动化. DOI: 10.7500/AEPS20170125002.
Liuchen Chang,Wenhan Wu,Meiqin Mao.LVRT Control Strategy of CSC-DPMSG-WGS based on PIR Controller[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20170125002.
基于PIR控制器的电流源型永磁直驱风力发电系统低电压穿越控制
LVRT Control Strategy of CSC-DPMSG-WGS based on PIR Controller
DOI:10.7500/AEPS20170125002
关键词: 电流源型变换器  谐振控制器  功率波动  低电压穿越
KeyWords: Current source converter  Resonant controller  power fluctuation  low voltage ride-through
上网日期:2017-05-19
基金项目:国家自然科学基金,国家重点基础研究发展计划(973计划),广东省人才创新项目,高等学校博士学科点专项科研基金
作者单位E-mail
张榴晨 合肥工业大学教育部光伏系统工程研究中心 lchang@unb.ca 
吴文晗 合肥工业大学教育部光伏系统工程研究中心 wuwenhan11@foxmail.com 
茆美琴 合肥工业大学教育部光伏系统工程研究中心 mmqmail@163.com 
摘要:
      本文提出了一种基于PIR(proportional-integral-resonant)控制器,且适用于电流源型永磁直驱风力发电系统(Direct-drive PMSG wind generation system based on current source converter,CSC-DPMSG-WGS)的低电压穿越运行控制方案。根据所提出的方法,电网故障时,通过机侧变换器控制来限制风力发电机的电磁功率,以实现机侧和网侧的功率平衡;网侧控制器在正序旋转坐标系下采用PIR控制器同时对正负序电流进行无差控制,以消除两倍基频的功率波动,进而稳定直流电流。仿真与实验结果表明,所提出的控制方案在电网对称及不对称故障下均可有效降低直流电流波动,并实现CSC-DPMSG-WGS的低电压穿越。
Abstract:
      A novel low voltage ride-through (LVRT) control method for Current-Source-Converter-Based Direct-drive PMSG wind generation system (CSC-DPMSG-WGS) based on proportional-integral-resonant (PIR) controller is presented in this paper. By the proposed method, once unbalanced grid voltage dip happens, the generator-side converter rapidly limits the power which flows to DC-link, which can coordinate power of grid-side and generator-side; meanwhile the grid-side converter adopts PIR controller which controls the positive and negative sequence currents simultaneously in positive sequence rotating coordinate system, to eliminate the power ripples of twice times fundamental frequency caused by unbalanced grid fault and maintain dc current stable. Simulation and experimental results prove that the proposed control strategy can eliminate the fluctuation of DC current and realize LVRT under balanced and unbalanced dip faults.
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