交流励磁变速恒频风力发电控制系统的研究.doc
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- 关 键 词:
- 交流 变速 风力 发电 控制系统 研究
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1、摘 要由于常规能源紧缺及环境问题日益突出,利用可再生能源作为未来最重要的清洁替代能源,对于缓解能源匮乏具有重要的意义。风能由于其突出的优点而倍受关注,风力发电技术也成为各国学者竞相研究的热点。 以交流励磁双馈电机作为发电机运行的风力发电系统,具有独立的有功、无功功率调节能力,并可以改善电力系统稳定性。本文主要针对交流励磁变速恒频双馈风力发电系统的关键技术进行了较为系统的研究。 本文分析了双馈发电机的运行原理和能量关系,推导建立了其在三相静止和两相旋转坐标系下的数学模型,提出了定子磁链定向矢量控制策略,实现了有功与无功功率的解耦。然后研究了满足双馈发电机转子能量双向流动要求的双PWM变换器及其控
2、制策略。最后,建立了变速恒频双馈风力发电系统的仿真模型,通过仿真验证了理论、模型和控制策略的正确性、可行性。关键词:变速恒频 ;交流励磁 ;双馈感应发电机 ;矢量控制 ;双PWM变换器 AbstractWith the lack of general energy sources and the worsening of environment problems increasingly, it is provided with very important meanings to abate energy lack by using renewable energy source. Beca
3、use of its outstanding merits, wind power isattention in the exploitation of renewable energy source, and the wind power has become the research hotspot of many countrys scholars.The variable-speed constant-frequency (VSCF) wind power generation system using doubly fed induction generator (DFIG), ca
4、n adjust the active and reactive power separately, and improve the stability of electric power system. The key technology of VSCF doubly fed induction generator system is studied in the paper.This paper has analyzed opration principle and energy relationship of DFIG,deduced and built mathematic mode
5、ls of it on the three phase stationary and two phase rotating coordinate systems, put forward the stator flux oriented vector control strategy of DFIG for the realization of decoupling control of active and reactive power. Then, this paper has studied the back-to-back PWM converter that satisfies th
6、e request of energy bidirectional flowing of DFIGs rotor and its control strategy. Finally,this paper has built the simulation model of the Variable-Speed Constant-Frequency Doubly-Fed Wind Power Generation system, validated the validity and feasibility of theory,model and control strategy through s
7、imulation.Key words: VSCF ;AC Excitation ;DFIG ;Vector Control ;Back-to-Back PWM Converter 目 录1 绪论11.1风能开发与风电发电的历史11.2国内外风力发电的发展状况11.2.1国外风力发电的发展状况11.2.2国内风力发电的发展状况21.3风力发电控制技术的发展趋势21.4变速恒频运行方式31.5本文研究的主要内容52 交流励磁双馈发电机的工作原理及数学模型62.1引言62.2变速恒频双馈异步发电机运行的基本原理及特点62.2.1变速恒频双馈异步发电机运行基本原理62.2.2变速恒频双馈异步发电机的
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