风电场对电力系统影响的仿真分析风电场对电力系统影响的仿真分析.doc

电子与信息工程学院 本 科 毕 业 论 文 论文题目风电场对电力系统运行影响的初步研究 学生姓名 汪云龙 学 号 103522002 专 业 电气工程及其自动化 班 级 103522 指导教师 孟鹏老师 2014年5月  摘 要 近年来，风能作为一种可再生的绿色能源，受到广泛的关注。随着我国的风电事业的不断发展，风电场规模不断扩大，大型风电场并网运行对电网造成的影响也越来越大，成为制约风电场建设规模的严重阻碍，因此研究风电场并网对电力系统的影响具有重要意义。 本文以双馈型异步发电机的发电系统为例，建立动态数学模型，包括随机风模型、风力机模型、双馈型异步风力发电机模型。分析了大规模风电场并网的运行特性，分析了并网风电场对系统的稳定性和电能质量的影响。 通过所建立的风力发电系统数学模型，在MATLAB/Simulink仿真环境下实现了大型风电场与系统并网的风力发电系统动态仿真。研究系统运行中的风速变化、负荷扰动、系统发生单相接地和三相短路故障时对电网和风电场各节点的电压波动、电流波动以及引起的功率变化。通过仿真分析结果可以看出，采用双馈型异步风力发电系统能满足系统稳定性要求。 关 键 词：风力发电；双馈型异步风力发电机；Matlab/Simulink动态仿真；  ABSTRACT Wind power as a kind of renewable green power resources has been received extensive attention in the recent years．With the development of wind industry in China and the expansion of the scale of wind farms，the influence brought by large wind farms connected to power systems has become greater and greater，which has become a great obstacle to the further utilization of the wind resource．Therefore，the research on the impact of wind farm connected to power systems is an important issue that should be solved urgently． A series of dynamic mathematics models of wind turbine generator based on the doubly-fed induction wind power system are set．Including wind speed model，wind turbine model and doubly-fed induction generator model and so on． Through which，the function characteristics of large grid-connected wind farm are analyzed，and the interactions of wind power and the grid，especially to the stability and supply quality of the power system，are researched． Finally,taking the large grid-connected wind farm with the unlimited powersystem for example，the simulation is developed using MATLAB／Simulink tools by the dynamic mathematics models．This paper analyses in depth the impacts of grid-connected wind farm，including wind speeding changes，load disturbs，single phase-to-grou