风电蓄热供暖系统控制技术的研究

发布时间：2019-01-11 11:55

【摘要】：随着全球能源的日益匮乏以及传统发电方式所引起的环境污染问题的加剧,我国政府已经把发展风力发电设为新能源战略的重要部分,并给予大力支持,我国风力发电行业的发展前景广阔。且在我国一些寒冷风大、冬季时间长且缺乏传统能源的地区,存在着取暖困难的问题,严重影响了居民的生产和生活,制约了这些地区的发展。所以利用这些地区风大且已经建有中小规模风电厂的特点,基于离网型风力发电系统,构建高效率的电能转化系统,将丰富的风力资源转化为急需的热能,并对整个风电蓄热供暖系统进行合理的控制就成为解决这些地区取暖问题的有效手段。风电蓄热供暖系统不但可以满足供暖的需要,而且减少了化石能源的使用,促进了能源结构的优化配置。并且能够有效地改善因燃煤供暖所引起的环境污染问题,提高空气质量,减少雾霾、酸雨等现象的发生,是一举多得的举措。本文介绍了风电蓄热供暖系统的主要结构,对系统的风力发电部分和蓄热供暖部分分别进行了分析和研究。风力发电部分对双馈感应电机和双PWM变流器进行了数学模型分析,并研究了离网型风力发电系统的运行机理及控制策略。在分析风力发电功率控制技术的基础上,提出了适合风电蓄热供暖系统的MPPT控制策略,并进行了不同风速下的仿真实验,仿真验证了系统基本结构和控制方法的可行性,由仿真结果可以看出,控制策略反应速度快,有效地缩短了最大功率跟踪所用的时间。蓄热供暖部分研究了它的工作原理和工作参数,提出了对电加热设备和蓄热装置等的选择原则,并利用组态王软件完成了监控软件的设计和开发。
[Abstract]:With the increasing shortage of global energy and the worsening of environmental pollution caused by traditional power generation, our Government has set up the development of wind power generation as an important part of the new energy strategy and has given its strong support. The development prospect of wind power industry in China is broad. In some areas of our country where the cold wind is strong, the winter time is long and the traditional energy is lacking, there is the problem of heating difficulty, which seriously affects the production and life of the residents, and restricts the development of these areas. Therefore, based on the characteristics of wind-intensive wind power plants in these areas and small and medium-sized wind power plants, based on off-grid wind power generation systems, a high-efficiency power conversion system is constructed to convert abundant wind energy resources into much-needed heat energy. Reasonable control of the whole regenerative heating system of wind power is an effective means to solve the heating problem in these areas. Wind power regenerative heating system can not only meet the needs of heating, but also reduce the use of fossil energy, and promote the optimal allocation of energy structure. And it can effectively improve the environmental pollution caused by coal-fired heating, improve air quality, reduce the occurrence of haze, acid rain and so on. In this paper, the main structure of wind power regenerative heating system is introduced, and the wind power generation part and the regenerative heating part of the system are analyzed and studied respectively. In the part of wind power generation, the mathematical model of doubly-fed induction motor and double PWM converter is analyzed, and the operation mechanism and control strategy of off-grid wind power generation system are studied. On the basis of analyzing the power control technology of wind power generation, the MPPT control strategy suitable for wind power regenerative heating system is put forward, and the simulation experiment under different wind speed is carried out, which verifies the feasibility of the basic structure and control method of the system. The simulation results show that the response speed of the control strategy is fast and the time of maximum power tracking is shortened effectively. In the part of regenerative heating, the working principle and working parameters are studied, the selection principle of electric heating equipment and heat storage device is put forward, and the design and development of monitoring software are completed by using Kingview software.
【学位授予单位】：太原科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU832

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