大型风力发电机组
风力发电电能变换装置的研究与设计
摘要：风能作为一种可再生能源越来越受到人们广泛的重视，其中变速恒频风力发电是现代风力发电中的一个发展趋势。而在变速恒频风力发电中，又向着直驱化方向发展，但直驱风力发电机产生的电能存在着电压幅值和频率随风速变化、功率不稳定等诸多问题。为解决上述问题，本文对直驱式变速恒频风力发电领域的关键技术从理论到仿真进行了较为全面的学习与分析，在详细分析直驱式风力发电系统的特点和已有风力发电系统控制的基础上，确立波永磁同步发电机、AC-DC-AC的主电路拓扑结构，提出了系统总体控制策略，该策略能够很好的实现电压幅值功率因数调节，系统主电路主要是双闭环（电压外环、电流内环）实现电能功率调节，为了提高系统控制性能，设计了系统过流过压保护电路，经仿真验证，该系统能够良好的运行，基本上实现可靠性高，电压调节范围大，效率等目标。 关键词：风力发电系统；AC-DC-AC变换器；控制策略；双闭环调节；仿真
The research and design of the wind power electricity transformation mechanism
Abstract：Wind energy is renewable energy widely used by more and more people’ attention, the variable speed constant frequency wind power generation is the trend of modern wind power development. In variable speed constant frequency wind power generation, the direct driving direction system, which is a direct-drive wind turbines generate electricity voltage amplitude and frequency change with wind speed. Obviously power is unstable, and many other problems. To solve the above problems, this paper proposed the direct drive that the key technology in the field of variable speed constant frequency wind power generation has carried on the comprehensive study from theory to simulation and analysis, the detailed analysis of the characteristics of the direct drive wind power system and wind power system control. on the basis of the establishment of permanent magnet synchronous generators, matrix converter main circuit topology, based on space vector modulation of matrix converter is proposed algorithm, the algorithm can achieve good voltage amplitude power factor
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