【作者】 骆玲；

【导师】 文劲宇；

【作者基本信息】 华中科技大学 ， 电力系统及其自动化， 2007， 硕士

【摘要】 能源危机、电力紧缺等问题日益突出,风电作为未来最重要的清洁替代能源之一,对于缓解能源匮乏具有重要意义。随着风力发电技术不断进步,单机容量不断增大,包括中国在内的许多国家相继推出了鼓励风电的政策,并网风电场在电网中所占的比例逐渐加大,对电网带来的各种新问题也日益突出。因此有必要深入研究并网风电场对电网稳定性的影响。论文首先总结了风电技术的应用与研究现状,分析了并网风电场对电网的影响,并介绍了风电场接入电力系统的国内外技术规定。结合福建省南日岛后山仔风电场具体实例,分析了该电场对福建电网可能带来的影响。此外,还介绍了风力发电几种常用的分析和研究工具。论文第3章系统地归纳和阐述了风力发电的基本原理、组成和分类。第4章研究了双馈风力发电系统的建模,并在MATLAB/Simulink下建立了详细的仿真模型,系统实现了有功功率和无功功率的解耦控制与风力机的最大风能捕获控制,仿真结果验证了模型的正确性和分析的合理性。论文第5章研究了风力发电机组和风电场实用PSS/E模型的相关问题,介绍了PSS/E下自定义建模的流程、方法及模型调用的具体操作步骤,并提出了动态模型的初始化方法,该方法同样适用于其它电力系统仿真软件PSCAD、PSASP等的自定义建模。此外,为提高建模效率,根据风机运行实际情况,推导了忽略定子磁链变化的双馈电机三阶模型,简化了系统的建模仿真与分析过程,为开展并网风电场对电力系统稳定性影响的研究奠定基础。更多还原

【Abstract】 Due to the energy crisis, the lack of electric power and the increasingly worsening circumstance of power supply, the wind energy, as one of the most important substituted clear energy sources, provided a meaningful solution to energy crisis. With the development of wind power generation, many countries, including China, have published related policies to encourage wind power generation. More and more wind farms integrated into the power grid, it is necessary to investigate the impact of increasing wind turbine penetration to power system dynamic stability.The application and researching status of wind generation is summarized. The impact of integrated wind farms to grid is analyzed and the standard specifies of integrated wind farms in China and other countries are introduced. A practical wind farm of Fujian province is analyzed. Besides, several common tools for simulating and analyzing wind generation are introduced.The basic concepts, structure and classification of the wind generation system are described detailedly in chapter 3. The modeling of the widely used wind generation system with doubly-fed induction generator (DFIG) is studied. The decoupling control method of DFIG’s active and reactive powers is implemented as well as the maximal wind energy capture. Simulating results verified the validity and feasibility of the control method proposed.In order to investigate the impact of increasing wind turbine penetration to power grid by PSS/E, User-Defined Modeling (UDM) Technique is introduced in chapter 5. The detail flow chart of UDM, the initialization method for modeling and the operation method for using of UDM models are described. The UDM method proposed in the paper is also applicable for the modeling of other power system elements.Finally, the field testing results of the practical wind farm are introduced. These data are very useful for checking the simulation models.更多还原