摘要当今世界，越来越突出的能源危机和越来越严重的环境污染成为人类面对的两大难题。在各国发展的清洁能源中，风力发电由于其成熟的技术成为主流。但是并网型风电场会给电网带来诸多影响，由于风电场多采用恒速异步电机，因此最突出的影响在于风电场为励磁会从电网吸收无功功率，从而降低电网电能质量，破坏电压稳定性。为解决上述问题，本文采用风电场出口处并联STATCOM进行无功补偿的方法。82682
本文研究分析了风力发电机组的数学模型。论文基于MATLAB/Simulink，研究分析了由风力异步发电机组成的风电场并网的稳态和暂态运行特性，验证了在风电场并网点加装动态无功补偿设备的必要性。接下来，本文研究分析了STATCOM的工作原理和数学模型，根据STATCOM双环控制策略，针对STATCOM的强耦合系统，推导出STATCOM的dq轴解耦的控制原理。最后通过仿真分析了STATCOM动态的无功补偿效果。仿真结果表明STATCOM能有效改善系统稳态运行特性并提高风电场暂态电压稳定性。
毕业论文关键词 风电场 异步风力发电机组 STATCOM 动态无功补偿
毕业设计说明书外文摘要
Title Research on the application of static synchronous compensator in reactive power compensation of wind farm
Abstract In today's world, more and more serious energy crisis and environmental pollution has become the two major challenges facing humanity。In the development of clean energy, wind power is the mainstream because of its mature technology。But the grid-connected wind farm will bring a lot of impact on the power grid。Because of the constant speed induction motor, the most prominent effect is that the wind farm will absorb reactive power from the grid so that the power quality and the voltage stability is reduced。In order to solve the above problems, this paper uses the method of reactive power compensation in parallel STATCOM。
In this paper, the mathematical model of wind turbine is analyzed。The paper based on MATLAB/Simulink,researchs and analyzes the steady-state and transient-state grid-connected operating characteristics of the wind farm composed of induction generators。The necessity of adding dynamic reactive power compensation device to the grid connection point of the wind farm is verified。Then this paper study the mathematical model of STATCOM。According to the double loop control strategy of STATCOM, the control principle of the DQ axis decoupling of STATCOM is deduced due to the strong coupling system of STATCOM。Finally, the reactive power compensation effect of STATCOM is analyzed by simulation。The simulation results show that STATCOM can effectively improve the steady-state operating characteristics of the system and the transient voltage stability of the wind farm。
Keywords wind farm asynchronous wind turbine generators STATCOM dynamic reactive power compensation
目 次
1 绪论 1
1。1 课题研究的背景及其意义 1
1。1。1 能源危机及其永续发展 1
1。1。3 风力发电并网运行的技术问题 2
1。1。4 STATCOM对风电场运行问题的改善 2
1。2 课题研究现状 2
1。2。1 国内外风电场无功补偿研究现状 2
1。2。2 国内外STATCOM研究现状 STATCOM静止同步补偿器在风电场无功补偿中的应用研究:http://www.youerw.com/zidonghua/lunwen_97023.html