大规模风电并网运行频率稳定与控制策略研究

发布时间：2018-07-12 12:41

本文选题：风力发电 + 频率稳定　；参考：《华北电力大学》2014年硕士论文

【摘要】：作为最成熟和最具发展前景的清洁发电技术，风力发电近年来保持着强劲的发展势头，大规模风电并网运行将成为必然趋势。更具规模化的风力发电不仅顺应了全球能源结构调整的战略目标，同时也对相关技术领域提出了更高的要求和挑战。本文在已有的风力发电技术研究基础之上，针对大规模风电并网运行后所带来的频率稳定性问题，以风电场的有功功率控制策略为对象开展研究工作。首先，分析了风力发电的基本原理与风电机组的分类，并详细介绍了恒速恒频风力发电机组、双馈异步风力发电机组和永磁直驱风力发电机组的基本结构与运行特点；针对主流机型（双馈型风力发电机组）建立其数学模型，并在MATLAB中搭建实现。在此基础之上，分析了风力发电并网运行给电力系统频率稳定性带来的影响。其次，风力发电机组有功控制是风电场有功控制过程中的重要环节之一，因此介绍了风力发电机组的有功功率控制策略。基于不同风速的划分，风力发电机组有低风速、中风速和高风速三种控制模式，并且在三种控制模式下，风力发电机组都能够很好地进行有功功率控制，，为发挥风电场的辅助调频功能提供了必要条件。最后，在已有的研究基础上，针对规模化风电并网所带来的频率问题，从风电场侧出发，介绍了一种具有辅助调频功能的风电场有功功率控制策略。当系统频率偏差超过限值时，风电场切换至辅助调控模式，从而能够主动参与一部分频率调节工作，可以在一定程度上缓解常规电厂的调频压力，加快频率恢复的速度与时间。
[Abstract]:As the most mature and the most promising clean generation technology, wind power generation has maintained a strong momentum of development in recent years. Large-scale wind power grid operation will become an inevitable trend. More scale wind power generation not only complies with the strategic target of global energy structure adjustment, but also puts forward higher requirements on relevant technical fields in the same time. And challenge.
Based on the research of the existing wind power generation technology, this paper aims at the problem of frequency stability caused by large-scale wind power grid operation, and carries out research work on the active power control strategy of wind farm.
Firstly, the basic principle of wind power generation and the classification of wind turbine are analyzed, and the basic structure and operation characteristics of the constant speed constant frequency wind generator, the doubly fed asynchronous wind turbine and the permanent magnet direct drive wind turbine are introduced in detail, and the mathematical model is established for the mainstream model (double fed wind turbine), and in the MATLAB Based on this, the influence of grid connected wind power generation on the frequency stability of power system is analyzed.
Secondly, the active control of the wind turbine is one of the important links in the active control of the wind farm. Therefore, the active power control strategy of the wind turbine is introduced. Based on the division of the wind speed, the wind turbine has three control modes with low wind speed, middle wind speed and high wind speed, and the wind generator under the three control modes. The whole group can perform active power control well, which provides a necessary condition for giving full play to the auxiliary frequency modulation function of wind farms.
Finally, on the basis of the existing research, in view of the frequency problem brought by the large-scale wind power grid connected to the grid, the active power control strategy of the wind farm with auxiliary FM function is introduced from the wind farm side. When the frequency deviation exceeds the limit value, the wind farm switches to the auxiliary regulation mode, so that it can actively participate in a part of frequency. The adjustment work can relieve the FM pressure of conventional power plants to a certain extent, and speed up the speed and time of frequency recovery.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM614

【参考文献】