大容量风电场接入引起电力系统振荡研究
大容量风电场接入引起电力系统振荡研究(任务书,开题报告,外文翻译,论文12000字)
摘要
在资源越渐越短缺的现代社会，风力发电技术收到了越来越普遍的应用和重视，并逐渐走向成熟，大量风电机组投入电网，所占比例也逐日增加，接入电压等级也发展到更高配输电系统中。在大容量并网风电场与系统之间交互引起动乱，由此会对电网的安全系统构成威胁，会引起系统振荡。在这样的背景下，针对大容量风电场接入引起电力系统振荡这一问题，根据分析方法和系统的不同，对目前的研究进行综述，并讨论关于问题方面的研究现状，然后还对大容量风电并网的次同步震荡方法，包括频率扫描法，特征值分析法，复转矩系数法，时域仿真法，阻抗分析法以及机组作用系数法，概括了次同步振荡的抑制方法，并且对其未来的研究方向和发展进行了展望和分析。
关键词：大规模风电场；风力并网；系统振荡；串联补偿；次同步相互控制
Study on Power system Oscillation caused by large capacity Wind Farm access
Abstract
In the modern society where resources are becoming more and more scarce, wind power technology has received more and more common application and attention, and gradually matures. The distribution system has evolved into a high-voltage transmission system. The interaction between the large-capacity grid-connected wind farm and the system causes disturbances, which poses a threat to the security system of the grid and causes system oscillations. In this context, the current research is reviewed based on the analysis methods and systems for the problem of power system oscillation caused by large-capacity wind farm access, and the research status of the problem is discussed.Then, the subsynchronous oscillation method for large-capacity wind power grid-connected, including frequency sweep method, eigenvalue analysis method, complex torque coefficient method, time domain simulation method, impedance analysis method and unit action coefficient method, is also summarized. Inhibition methods, and prospects and analysis of its future research directions and development
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Key word:wind turbine;wind power grid;system oscillation
目录
第一章 绪论 1
1.1课题背景与意义 1
1.2风电场接入引起系统振荡的研究现状 1
1.3传统电力系统次同步振荡问题研究现状 3
第二章 双馈异步风力发电机组和风电并网问题 6
2.1 风力机结构 6
2.2双馈异步发电机模型 7
2.3大规模的集中风力发电 13
2.4风电并网运行的特点 13
2.5风电并网对电网的影响 14
第三章 双馈风电场次同步振荡研究 16 [来源：http://Doc163.com]
3.1 串补线路数学模型 16
3.2 风电场的接线和风电场模型 16
3.3仿真过程 17
3.4本章小结 26
第四章 结论与展望 27
4.1结论 27
4.2研究展望 27
参考文献 29
致谢 33
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