无源滤波及动态无功补偿技术研究

发布时间：2018-03-20 15:22

本文选题：谐波　切入点：无功补偿　出处：《山东理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：针对电网中非线性负载及感性负荷引起的谐波及无功功率问题,如何有效的滤除谐波及无功补偿具有重大现实意义。无源滤波器作为滤波手段具有成本低廉、技术成熟等优势,而单独使用无源滤波器或者无功补偿装置难以同时满足谐波抑制和无功补偿的需要,本文在此基础上提出了无源滤波及动态无功补偿系统设计方案。本文的具体内容如下:(1)设计了无源滤波及动态无功补偿系统结构,分析了无源滤波器的结构及工作原理,基于双调谐滤波器设计了无源滤波装置,使用两个磁控电抗器替代传统固定电抗器。分析了动态无功补偿装置的结构及工作原理,选取了晶闸管投切电容器(TSC)的投切时刻及控制策略。(2)分析了基于磁控电抗器的双调谐滤波器的原理,讨论了电感值对谐振频率的影响,对可变电抗器器件及其控制策略进行选择;针对无功功率检测法及谐波电流的采样处理进行详细分析,分别对基于磁控电抗器双调谐滤波器及TSC装置控制系统进行设计。(3)利用MATLAB平台进行建模仿真,通过调节两电抗器值来纠正双调谐滤波器因基频、电容值改变引起的失谐,对各个装置投入前后的谐波电流、谐波畸变率、功率因数进行了比较,通过对系统整体结构的仿真分析,验证了无源滤波及动态无功补偿装置的可行性和合理性。
[Abstract]:In order to solve the harmonic and reactive power problems caused by nonlinear load and inductive load, it is of great practical significance to effectively filter harmonic and reactive power compensation. As a filter, passive filter has the advantages of low cost and mature technology. However, it is difficult to satisfy the need of harmonic suppression and reactive power compensation by using passive filter or reactive power compensation device alone. On this basis, the design scheme of passive filter and dynamic reactive power compensation system is proposed. The concrete contents of this paper are as follows: 1) the structure of passive filter and dynamic reactive power compensation system are designed, and the structure and working principle of passive filter are analyzed. The passive filter device is designed based on double tuning filter. Two magnetically controlled reactors are used to replace the traditional fixed reactor. The structure and working principle of the dynamic reactive power compensation device are analyzed. The switching time and control strategy of thyristor switched capacitor (TSC) are selected to analyze the principle of double-tuned filter based on magnetron reactor, and the influence of inductance on resonant frequency is discussed. The variable reactor device and its control strategy are selected, and the reactive power detection method and harmonic current sampling processing are analyzed in detail. The double tuning filter based on the magnetic reactor and the control system of the TSC device are designed respectively. The modeling and simulation are carried out by using the MATLAB platform. The detuning caused by the change of the fundamental frequency and the capacitance value of the double tuned filter is corrected by adjusting the value of the two reactors. The harmonic current, harmonic distortion rate and power factor of each device before and after putting into operation are compared. The feasibility and rationality of passive filter and dynamic reactive power compensation device are verified by simulation and analysis of the overall structure of the system.
【学位授予单位】：山东理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713;TM714.3

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