文章摘要
李庆,程鹏,王伟胜.双馈风电机组中频谐波电流建模与分析[J].电力系统自动化,2018,42(18):41-47. DOI: 10.7500/AEPS20180331002.
LI Qing,CHENG Peng,WANG Weisheng.Modeling and Analysis of Harmonic Current in Middle-frequency Band in DFIG Based Wind Turbines[J].Automation of Electric Power Systems,2018,42(18):41-47. DOI: 10.7500/AEPS20180331002.
双馈风电机组中频谐波电流建模与分析
Modeling and Analysis of Harmonic Current in Middle-frequency Band in DFIG Based Wind Turbines
DOI:10.7500/AEPS20180331002
关键词: 双馈感应发电机  谐波电流  谐波电压  死区时间
KeyWords: doubly-fed induction generator  harmonic current  harmonic voltage  dead time
上网日期:2018-07-23
基金项目:北京市自然科学基金资助项目(3184062);国家电网公司科技项目(NYB17201700081)
作者单位E-mail
李庆 新能源与储能运行控制国家重点实验室(中国电力科学研究院有限公司), 北京市 100192 liqing@epri.sgcc.com.cn 
程鹏 新能源与储能运行控制国家重点实验室(中国电力科学研究院有限公司), 北京市 100192  
王伟胜 新能源与储能运行控制国家重点实验室(中国电力科学研究院有限公司), 北京市 100192  
摘要:
      随着风电产业的快速发展与电力电子设备容量的不断提升,双馈风电机组得到了更多应用与装备,其引起的中频段(100~1 000 Hz)谐波问题不容忽视。为准确反映双馈风电机组电机内部及其与电网之间谐波的相互影响,需建立可评估双馈风电机组定子侧输出中频谐波电流的等效谐波模型。采用典型矢量控制的双馈风电机组为研究对象,研究了电网背景谐波、脉宽调制死区对双馈风电机组定子侧中频谐波电流的影响机理,建立了包含电网背景谐波、脉宽调制死区并可评估双馈风电机组定子侧中频电流的数学模型。最后,通过3.0 MW双馈风电机组的仿真结果、计算结果和现场测试数据的对比,验证了所建立的双馈风电机组谐波模型的准确性。
Abstract:
      With the rapid development of wind power industry and the continuous growth of capacity of power electronic devices, the middle-frequency band(MFB)harmonics problem that results from the widespread usage of doubly-fed induction generator(DFIG)based wind turbines has become much outstanding. To precisely reflect the harmonic interactions between DFIGs and a power grid, the equivalent harmonic model that can be used to evaluate the MFB harmonic current of DFIG needs to be developed. Based on the typical vector-controlled DFIG, the mechanism of influence of power grid background harmonics and pulse width modulation(PWM)dead time on the stator-side MFB current of DFIG is studied. A mathematical model that can be used to assess the stator side MFB current of DFIG is also developed with consideration of power grid background harmonics and PWM dead time. The accuracy of the proposed equivalent harmonic model of DFIG is verified by comparative analysis of simulation results, calculation results and field test data of a 3. 0 MW DFIG.
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