【作者】 张焕伟；

【导师】 郭家虎；

【作者基本信息】 安徽理工大学 ， 电路与系统， 2011， 硕士

【摘要】 随着风力发电技术的不断进步,单台风力发电机组容量越来越大,同时多机种风力发电场的建设进程也大大加快,风力发电系统与电网的关系越来越密切。本文着眼于多机种风力发电场接入电网对电网系统以及风电机组的影响,研究了多机种风力发电场接入电网的有功功率和频率的协调控制策略以及无功功率和电压的协调控制策略。本文首先分析了永磁直驱、鼠笼异步以及双馈式变速恒频风力发电系统的原理、数学模型及其控制策略；并采用PSCAD软件对其进行并网模拟仿真,对比了3种不同类型的变速恒频风力发电系统各种特性,为研究风电场稳定性提供了基础。其次建立小型风电场模型,研究了小型风电场简化模型；通过仿真比较单台大容量风电机组与多台小容量风电场并网对电网系统稳定性以及风电场内集电效应的影响,为了研究多机种风电场集群控制提供了依据。最后基于PSCAD软件构建了多机种风电场模型；考虑到风速的随机性、接地故障等情况,分析了多机种风电场并网对电网系统电压、频率稳定性的影响；并进行了多机种风电场接入电网后集群控制技术的研究。分析了电网系统发生电压跌落时,通过多机种风电机种对无功功率和电压的协调控制策略。更多还原

【Abstract】 With the continuous progress of wind power technology. Single wind turbine’s capacity is increasing, and The construction of wind farms are greatly accelerated the process. The grid power Increased by installed capacity of wind farms, Wind power generation system and grid are getting closer. This paper focuses on heterogeneous wind farms into power on the grid system and the impact of wind turbines. Study the heterogeneous grid wind farm active power and frequency of access to coordinated control strategy and the reactive power and voltage of the coordinated control strategy.Power quality is caused by wind power becomes more and more to highlight. It is particularly important to Research power quality problems caused by wind power.This paper analyzes the wind power generation system theory, mathematical model and control strategy of permanent magnet synchronous generator.Squirrel-cage Induction generator and double fed induction generator Wind Power Generation System. And Wind farms and network simulationed by Software of PSCAD. Compared the three different types of variable speed constant frequency wind power generation system with characteristics, which provides the basis for the stability of wind farm study.Second, build a small wind farm model. And research the simplified model of a small wind farm.The capacity of a single wind turbine and Multiple small-capacity wind farm simulationed to Compare the Power System Stability and effects of wind farm collector, which provides the basis for the stability of wind farm study.Finally, build a wind farm model of heterogeneous by PSCAD software, Consider the randomness of wind speed, ground fault, etc. Analysis the Grid system voltage and frequency stability base on heterogeneous wind farms. And conducted a heterogeneous wind farms into power after the cluster control technology. Analysis of the grid voltage drops, Multiple types types of wind turbine reactive power and voltage control strategy.更多还原