大规模风电并网系统暂态稳定分析及控制

发布时间：2018-04-18 13:15

本文选题：暂态稳定性 + 双馈风力发电机　；参考：《哈尔滨工业大学》2017年硕士论文

【摘要】：随着我国近年来风力发电的快速发展,风力发电已经成为我国非常重要的电能来源。虽然近年来风电发展迅速,但依然存在一些急需解决的问题,其中风电的并网消纳和风电并网对电力系统的稳定性影响是最突出的两个问题。由于风电的大规模并网改变了系统原有的结构和特性,因此对含风电的电力系统进行暂态稳定性的分析,并研究提高系统暂态稳定性的控制策略是很有必要的。本文基于扩展等面积法对风电并网对电力系统暂态稳定性的影响进行理论研究,并基于理论研究的成果提出能改善含风电电力系统的暂态稳定性的控制策略。首先,基于传统的扩展等面积法的原理及双馈风力发电机的结构和暂态特性,利用扩展等面积法对含风电的电力系统进行暂态稳定性的研究,提出含风电系统暂态过程中加速面积、减速面积和稳定度的计算方法,然后通过算例对所提出的理论分析方法进行评估验证,并提出该方法的适用条件。然后,为了分析风电并网对电力系统暂态稳定带来的影响,采用所提出的含风电电力系统暂态稳定EEAC算法,进行了具体分析。分别讨论用等量风电替换火电并网及风电渗透率对系统暂态稳定的影响。并结合时域仿真进一步对风电场并网对电力系统暂态稳定性的影响进行对比分析。通过研究发现,在不考虑同步机暂态控制的条件下,同等容量下的风电场并网与火电厂并网相比,对电力系统暂态功角稳定性有更积极的影响;而不同风电渗透率下,风电场对系统暂态稳定性的影响与诸多因素相关,因此要根据具体并网情况进行分析。最后对能改善含风电系统暂态稳定性的控制策略进行研究,基于扩展等面积定则和暂态功角曲线对影响含风电系统暂态稳定性的因素进行分析,基于分析结果提出利用SVG进行无功补偿,提高暂态期间风电场并网母线电压,并设计了SVG的控制策略。最后基于实例对利用SVG进行无功补偿的控制策略进行仿真验证,证明了该方法的可行性。
[Abstract]:With the rapid development of wind power generation in China in recent years, wind power has become China's important energy sources. Although in recent years the rapid development of wind power, but there are still some problems need to be resolved, including wind power consumptive and wind power integration on power system stability influence is the two most prominent problems because of large-scale grid connected wind power has changed the structure and characteristics of the original system, the power system with wind power transient stability analysis, and Research on control strategy for improving system transient stability is very necessary. This paper extended equal area method for theoretical research on the impact of wind power integration on power system transient stability based on the results of theoretical research, and proposed control strategy can improve the transient stability of the power system with wind power. First of all, based on the traditional principle of EEAC method and double The structure and transient characteristics of doubly fed wind power generator, the research on the transient stability of power system with wind power by EEAC method, put forward to accelerate the area of power system with wind power transient process, deceleration area calculation method and stability, and then through the example of evaluation method for analysis of the proposed theory, and put forward the applicable conditions of the method. Then, in order to analyze the impact of wind power on power system transient stability, the wind electric power system transient stability EEAC algorithm with the proposed and analyzed. Discuss the use amount of wind power in power grid and replace the penetration of wind power on system transient stability. Combined with the time domain simulation further influence on wind farm on power system transient stability analysis. Through the study found that, without considering the transient control of synchronous machine under the condition of the same Compared to wind power and thermal power plant under grid capacity, have more positive effects on power system transient stability; and different wind power penetration, influence of wind field on the system transient stability is related to many factors, so it should be analyzed according to the specific situation. At the end of the grid can improve the control strategy of wind power system transient stability, analyze the factors of extended equal area criterion and transient power angle curve of wind power system transient stability based on the results of the analysis put forward by SVG based on the reactive power compensation, improve the temporary bus voltage during the state grid connected wind farm, and designed the control strategy of SVG. Finally based on case control strategy reactive power compensation for the use of SVG simulation results prove the feasibility of this method.

【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM614;TM712

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