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双馈风电场柔性高压直流输电并网控制策略
引用本文:杨涛,刘国平,黄淼,文一宇,廖勇,王国栋.双馈风电场柔性高压直流输电并网控制策略[J].重庆大学学报(自然科学版),2015,38(1):1-11.
作者姓名:杨涛  刘国平  黄淼  文一宇  廖勇  王国栋
作者单位:1. 重庆大学 输配电装备及系统安全与新技术国家重点实验室,重庆,400044;2. 国网重庆市电力公司 电力科学院,重庆,401123
基金项目:输配电装备及系统安全与新技术国家重点实验室自主研究资助项目(2007DA10512713303)。
摘    要:针对双馈风力发电机风电场VSC-HVDC的系统接入方式提出了一个控制方案,保障电力系统在波动的风电穿透率下的安全和稳定运行,对整个系统的动态模型分别进行了描述,基于矢量控制系统和虚拟电压坐标定向,对WFVSC稳态的电压控制模块和引入了d-q电流的交叉乘积项的暂态电压控制模块分别进行了设计,用来控制风电场电压的相应部分,同时,考虑交流侧和直流侧的参数变化以及外部扰动,提出了基于Lyapunov稳定性判据的GSVSC改进backstepping控制方案,这两个控制方案构成了本研究所提出的新的控制设计,此外,为验证所提控制方案的性能,假设了3种不同的仿真案例,包含交流和直流侧的参数变化,外部扰动如本地负荷的切入切出,电网电压谐波,通过MATLAB/Simulink软件模拟1台200MW机组VSC-HVDC并网运行验证,证明了该方案能够提高系统性能,并在文中做了进一步说明。

关 键 词:双馈感应电机(DFIG)  高压直流输电(HVDC)  电压源换流器(VSC)  风电场  backstepping  电能质量
收稿时间:2014/10/15 0:00:00

A new control design for grid integration ofDFIG wind farm with VSC-HVDC
YANG Tao,LIU Guoping,HUANG Miao,WEN Yiyu,LIAO Yong and WANG Guodong.A new control design for grid integration ofDFIG wind farm with VSC-HVDC[J].Journal of Chongqing University(Natural Science Edition),2015,38(1):1-11.
Authors:YANG Tao  LIU Guoping  HUANG Miao  WEN Yiyu  LIAO Yong and WANG Guodong
Institution:State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University,Chongqing 400044, P.R.China,Electric Power Research Institute of Chongqing Electric Power Company, SG, Chongqing 401123, P.R.China,Electric Power Research Institute of Chongqing Electric Power Company, SG, Chongqing 401123, P.R.China,Electric Power Research Institute of Chongqing Electric Power Company, SG, Chongqing 401123, P.R.China,State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University,Chongqing 400044, P.R.China and State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University,Chongqing 400044, P.R.China
Abstract:This paper proposes a control scheme for a doubly-fed induction generator (DFIG) wind farm with VSC-HVDC grid integration to ensure secure and reliable operation of power system with fluctuated wind power penetration. The whole system dynamic models are respectively described. Based on vector control system with a virtual voltage orientation, a steady-state voltage control block and a dynamic voltage control block with a cross-product term of d-q currents are separately designed for WFVSC to control the corresponding parts of the wind farm voltage. Meanwhile, with the consideration of AC and DC side parameter variation and external disturbance, an improved backstepping control scheme with Lyapunov stability provement is also proposed for the GSVSC. The combination of the two schemes makes up the new control design of this study. Besides, to verify the performance of the proposed new control design, three different cases are suggested which contain the AC and DC side parameter variation and external disturbance such as local load cut off-in, grid voltage harmonics. Finally, numerical simulations using MATLAB/Simulink are presented for a 200MW DFIG wind farm with VSC-HVDC grid integration to validate the proposed control scheme and demonstrate the improved system operation performance. Moreover, the corresponding discussions are also presented for further illustrations.
Keywords:doubly-fed induction generator (DFIG)  high voltage dc transmission (HVDC)  voltage source converter (VSC)  wind farm  backstepping  power quality
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