三电平背靠背变换器的谐波消除与可靠性研究

发布时间：2018-05-30 06:21

本文选题：背靠背变流器 + SHEPWM　；参考：《安徽大学》2017年硕士论文

【摘要】：由于背靠背变流器具有功率因素可调、能量双向流动等优点,它被广泛的应用于可再生能源发电和微电网等领域。且随着风力发电系统等新兴领域的快速发展,作为核心部分的背靠背变流器技术也得到了广泛重视。因此,对于背靠背变流器控制性能的研究具有什么重要的意义。本文以三电平背靠背变流器为研究对象,论文主要针对谐波消除、损耗分析与比较等问题展开研究,论文的主要研究内容如下:1、分析电压型背靠背变换器的工作原理,同时介绍了 SPWM、SVPWM和SHEPWM三种调制策略的具体实现。2、针对SHEPWM调制策略的开关角求解,分析了一些传统算法,例如多项式插值法、遗传算法等,最终引出论文提出的量子遗传算法。通过MATLAB/Simulink的S-function函数求出结果,并与遗传算法进行比较,搭建仿真模型带入结果,仿真与实验结果验证分析方法可行性。3、分析功率器件工作状态与开关过程、建立功率开关器件的损耗模型,通过仿真实验对在不同调制方式下的损耗进行分析比较。4、搭建电压型背靠背变换器的硬件电路平台,其中包括主电路、驱动电路、信号采样电路和控制电路的设计与调试,实验与仿真结果验证本文研究可行性与有效性。
[Abstract]:The back-to-back converter is widely used in renewable energy generation and microgrid because of its advantages of adjustable power factor and bidirectional energy flow. With the rapid development of wind power system and other emerging fields, back-to-back converter technology, which is the core part, has been paid more and more attention. Therefore, it is of great significance to study the control performance of back-to-back converter. In this paper, the three-level back-to-back converter is taken as the research object. The thesis mainly focuses on harmonic elimination, loss analysis and comparison. The main research contents of this paper are as follows: 1. The working principle of voltage type back-to-back converter is analyzed. At the same time, this paper introduces the realization of SPWM-SVPWM and SHEPWM modulation strategy. Aiming at the solution of switching angle of SHEPWM modulation strategy, some traditional algorithms, such as polynomial interpolation method and genetic algorithm, are analyzed. Finally, the quantum genetic algorithm proposed in this paper is introduced. The results are obtained by S-function of MATLAB/Simulink, and compared with genetic algorithm. The simulation model is built to bring the results into the results. The simulation and experimental results verify the feasibility of the analysis method. The working state of power devices and the switching process are analyzed. The loss model of power switch device is established, and the loss under different modulation modes is analyzed and compared by simulation experiment. The hardware circuit platform of voltage type back-to-back converter is built, which includes main circuit and drive circuit. The design and debugging of signal sampling circuit and control circuit, experimental and simulation results verify the feasibility and effectiveness of this study.
【学位授予单位】：安徽大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM46

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