液压型风力发电机组最佳功率追踪控制方法研究

发布时间：2018-10-16 11:05

【摘要】：近年来，国内外风力发电行业快速发展，在缓解环境和能源危机方面发挥着重要作用。液压型风力发电机组作为一种新机型，与传统双馈机型和直驱机型相比，具有功重比高、减速比实时可调、电能质量高等优点。提高风电机组的风电转换效率，对于新机型的应用推广具有重要意义，而最佳功率追踪控制是提高风电机组的风电转换效率的有效途径，因此，一般要求风力发电机组具有最佳功率追踪控制功能。本文以液压型风力发电机组最佳功率追踪控制方法为研究内容，在对机组各部分特性分析的基础上，采用理论分析、仿真与实验相结合的研究方法，从风力机转速控制、液压系统压力控制和发电功率控制三个方面着手，重点研究了液压型风力发电机组最佳功率追踪控制这一关键技术。在对液压型风力发电机组最佳功率追踪控制方法进行研究时，本文结合液压传动系统的特点，提出了四种液压型风力发电机组最佳功率追踪控制方法，并从理论上分析了各种方法控制的优缺点。其中，第一种方法的实质是直接发电功率控制；第二种方法的实质是发电功率和风力机转速联合控制，，是针对第一种方法的不足而提出的改进的控制方法；第三种方法的实质是直接压力控制；第四种方法的实质是压力和风力机转速联合控制，是针对第三种方法的不足而提出的改进的控制方法。利用MATLAB/Simulink软件和AMESim软件搭建了液压型风力发电机组最佳功率追踪控制联合仿真模型，对提出的四种最佳功率追踪控制方法分别进行了仿真研究；在理论及仿真分析基础上，利用实验室搭建的30kVA液压型风力发电机组实验平台分别对四种控制方法进行了实验研究，验证了本文中对四种液压型风力发电机组最佳功率追踪控制方法的理论研究的正确性。
[Abstract]:In recent years, wind power industry has developed rapidly at home and abroad, which plays an important role in alleviating the environmental and energy crisis. As a new type of wind turbine, hydraulic wind turbine has the advantages of high power to weight ratio, real time adjustable deceleration ratio and high power quality compared with the traditional doubly-fed type and direct-drive type. Improving wind power conversion efficiency of wind turbine is of great significance to the application and popularization of new type, and optimal power tracking control is an effective way to improve wind power conversion efficiency of wind turbine. Wind turbine is generally required to have the best power tracking control function. In this paper, the optimal power tracking control method of hydraulic wind turbine is taken as the research content. Based on the analysis of the characteristics of each part of the unit, the research method of combining theoretical analysis, simulation and experiment is adopted to control the speed of the wind turbine. Three aspects of hydraulic system pressure control and generation power control are carried out, and the key technology of optimal power tracking control of hydraulic wind turbine is studied. In this paper, four kinds of optimal power tracking control methods of hydraulic wind turbine are put forward according to the characteristics of hydraulic transmission system. The advantages and disadvantages of various control methods are analyzed theoretically. The essence of the first method is direct generation power control, the second method is the combined control of generation power and wind turbine speed, which is an improved control method aiming at the deficiency of the first method. The essence of the third method is the direct pressure control, and the fourth method is the combined control of the pressure and the speed of the wind turbine, which is an improved control method aiming at the deficiency of the third method. The combined simulation model of optimal power tracking control for hydraulic wind turbine is built by using MATLAB/Simulink and AMESim software. The four optimal power tracking control methods are simulated and studied respectively. Four kinds of control methods are studied by using the 30kVA hydraulic wind turbine experimental platform which is built in the laboratory. The correctness of the theoretical research of the four optimal power tracking control methods for hydraulic wind turbine is verified in this paper.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM315

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