左串右并型三相三线制UPQC控制方法研究

发布时间：2018-01-23 00:14

本文关键词： 电能质量统一电能质量调节器模糊控制间接控制策略电流滞环电压空间矢量　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：电力系统发展迅速,负荷类型也趋于多样化和复杂化,电力系统会出现各种类型的电能质量问题。为了减小电能质量问题造成的危害和损失,就必须以改善电能质量为目标,运用合理的电能质量控制技术来消除其影响。UPQC作为一种电能质量调节装置,其在补偿时兼具对电压和电流的补偿能力,具有很大的优势,目前已成为电能质量领域中的一个热点研究内容。本文以三相三线制无中线UPQC为研究对象,在阅读学习了大量相关中英文文献的基础上,分析研究了UPQC的拓扑结构,阐述其工作机理,重点研究了其检测单元的检测算法以及控制单元补偿控制策略。UPQC补偿信号检测算法的精确度对电能质量调节系统的补偿效果有很大的影响,本文简要阐述了三相电路瞬时无功功率理论,给出了基于瞬时无功功率理论的p-q法以及同样基于瞬时无功功率理论的p qi-i法的工作原理,并对这两种方法各自的优缺点进行探讨。重点研究了一种基于Park变换的补偿量检测算法,最后结合阅读的文献提出了一种基于FUZZY-PID的并联侧补偿信号检测的方法。补偿量控制策略是系统的核心部分,本文介绍了间接控制策略的原理,提出了一种串联补偿单元采用基于改进粒子群算法的模糊控制策略,介绍了其工作原理,然后深入研究了一种滞环最优矢量的并联补偿单元控制方法,对其进行理论上的较为详细的推导,并将其运用到并联补偿单元的控制中。对该方法进行仿真分析,并通过实验验证了该控制策略的可行性和有效性。
[Abstract]:With the rapid development of power system, the load types tend to be diversified and complicated. In order to reduce the harm and loss caused by the power quality problem, various types of power quality problems will appear in the power system. In order to improve the power quality, it is necessary to use reasonable power quality control technology to eliminate its influence. UPQC is a kind of power quality regulator, which can compensate both voltage and current. With great advantages, it has become a hot topic in the field of power quality. In this paper, three-phase three-wire non-midline UPQC as the research object. On the basis of reading and studying a large number of relevant Chinese and English literature, this paper analyzes and studies the topological structure of UPQC and expounds its working mechanism. Focus on its detection unit detection algorithm and control unit compensation control strategy. UPQC compensation signal detection algorithm accuracy of the power quality regulation system has a great impact on the compensation effect. In this paper, the instantaneous reactive power theory of three-phase circuits is briefly described, and the working principles of p-q method based on instantaneous reactive power theory and p qi-i method based on instantaneous reactive power theory are given. The advantages and disadvantages of the two methods are discussed, and a compensation detection algorithm based on Park transform is studied. In the end, a method of detecting compensation signal in parallel side based on FUZZY-PID is proposed. Compensation control strategy is the core of the system. This paper introduces the principle of indirect control strategy. This paper presents a fuzzy control strategy based on improved particle swarm optimization (PSO) for series compensation unit, and introduces its working principle. Then, a control method of parallel compensation unit based on hysteresis optimal vector is studied in detail. It is deduced in detail in theory and applied to the control of parallel compensation unit. The simulation analysis of the method is carried out and the feasibility and effectiveness of the control strategy are verified by experiments.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761

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