三相三线制并联有源电力滤波器研究

发布时间：2018-03-25 20:36

本文选题：有源电力滤波器　切入点：无谐波检测技术　出处：《湖北工业大学》2017年硕士论文

【摘要】：随着电力电子技术的发展,越来越多的电力电子装置投入到生产、生活的方方面面,给社会创造了巨大效益,给人们的生活带来了巨大改善,但也给电网带来了严重的谐波污染。而有源电力滤波器能够有效治理电网谐波,改善电网的供电质量,正得到广泛关注和研究。针对三相三线制并联有源电力滤波器,为充分利用其特点和优势,并扩展其应用领域,本文对其补偿性能展开了研究。文中采用了一种无谐波检测的新型控制策略,这种控制策略省去了常规控制策略中谐波及无功分量的检测环节,直接控制电网电流,减少了所需电流互感器的数量,又避免了谐波及无功检测环节本身误差和延时的影响。这种新型控制策略包含两个控制环:电流控制内环和电压控制外环,电流控制环用来调节电网电流,电压控制环用来调节直流侧电压。由仿真结果验证了本文所采用控制策略的有效性。然后,分析了并联型有源电力滤波器对在公用电网中应用普遍的电压源型与电流源型非线性负载的谐波补偿特性。通过理论分析推导出描述负载谐波电流放大效应的统一表达式,得出并联型有源电力滤波器不适合补偿电压源型非线性负载的原因。由此,提出了从控制策略和系统结构上抑制负载谐波电流放大效应的解决方法,改善并联型有源电力滤波器的谐波补偿性能。由仿真结果验证了理论分析和解决方法的正确性。最后,搭建了有源电力滤波器实验样机,对样机的主电路硬件选型和控制系统硬件、软件等方面分别进行了介绍和设计,并给出了样机运行的实验波形,通过实验结果表明了本文设计的有源电力滤波器样机补偿效果良好,能够改善电网电流质量。希望本文所做的研究工作,可以帮助到并联型有源电力滤波器的实用化推广。
[Abstract]:With the development of power electronic technology, power electronic devices increasingly put into production, all aspects of life, to create a huge benefit to society, bring great improvement to people's life, but also brings serious harmonic pollution to the power grid. And the active power filter can effectively suppress harmonics and improve power quality the power grid, is widely concerned and studied. For the three-phase three wire shunt active power filter, in order to make full use of its characteristics and advantages, and expand its application fields, this paper researches on the compensation performance. In this paper a novel control strategy for harmonic detection, this control strategy eliminates the need for conventional control the strategy in the harmonic and reactive component detection, direct control of grid current, reduce the number of current transformer, but also avoid the harmonic and reactive power detection of the error and delay When the impact. This new control strategy consists of two control loops: the inner current control loop and voltage control loop, current loop control is used to adjust the grid current, voltage control loop is used to adjust the DC voltage. The simulation results verify the validity of the control strategy used in this paper. Then, analysis of the shunt active power filter the harmonic compensation characteristics using the voltage source and current source type nonlinear universal load in public power system. The unified formula derived through theoretical analysis to describe the load harmonic current amplification effect, the shunt active power filter for compensating voltage source type nonlinear loads. Thus, puts forward the solving method of load harmonic current the amplification effect of inhibition from the control strategy and system structure, improve the harmonic compensation performance of the shunt active power filter. The simulation results show that the physical The correctness of the theory analysis and solving method. Finally, an experimental prototype of APF main circuit hardware, hardware selection and control system of the prototype, software and other aspects are introduced and designed, and the experimental waveforms are given by the operation of a prototype, the experimental results show that the compensation effect of active power filter prototype is designed in this paper good, can improve the quality of the grid current. I hope this study can help to the practical application, the shunt active power filter.

【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM761

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