并联有源滤波器控制方法研究

发布时间：2018-02-27 05:05

本文关键词： 三电平APF 简化三电平SVPWM 双区域电流预测控制　出处：《西南交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：伴随着现代科学技术的发展和工业自动化的普及,用电户对电能质量要求越来越高,提高电能质量具有重要意义。危害电能质量最为普遍的是谐波污染,有源电力滤波器(Active Power Filter,APF)就是解决这一问题的电能质量控制装置。电力系统的发展,增加了对经济、可靠的大容量APF的需要。本文研究和设计了一个二极管箝位三电平并联APF,重点阐述了该电能质量控制装置采用的双区域电流预测控制方法,以及APF各个模块功能和实现方法,在MATLAB/Simulink软件上搭建了装置模型并进行功能仿真,通过对主电路参数、模拟谐波发生器的辅助电路及基于数字信号处理(DSP)芯片电路的设计搭建了实验平台,验证了设计的可行性。在系统算法的研究方面,谐波电流的检测采用基于瞬时无功功率理论的谐波电流检测算法。针对有源电力逆变器外环直流侧电压波动,采用常规PI控制算法。内环电流控制方法采用双区域电流预测控制方法,首先通过分析传统三电平空间矢量脉冲宽度调制;Space Vector Pulse Width Modulation,SVPWM)算法的基础上,研究了一种简化的三电平SVPWM调制算法,该算法无需三角函数的计算,中点电位控制基本不增加算法的复杂度,大大减少DSP程序的运行时间；然后为了提高APF的补偿性能,在补偿电流误差较小(稳态)时,采用内环区域电流控制算法即简化三电平SVPWM调制算法,当补偿电流误差较大(暂态)时,采用外环区域电流控制,最大限度地减小误差；为了提高APF的实时性,最后在该算法中加入了简单预测控制。基于双区域预测控制算法搭建了三电平APF仿真模型并仿真,证明了该算法原理是正确的。硬件电路以数字信号控制芯片TMS320F2812为核心,外加驱动电路、电流传感器和电压传感器搭建而成,整个硬件电路采用模块化方式实现,致使整个电路调试方便、结构设计简单及设计成本低。
[Abstract]:With the development of modern science and technology and the popularization of industrial automation, electric power users have higher and higher requirements for power quality. It is of great significance to improve power quality. Harmonic pollution is the most common hazard to power quality. Active Power filter (APF) is the power quality control device to solve this problem. The development of power system has increased the need for economical and reliable large capacity APF. In this paper, a diode clamped three-level parallel APF is studied and designed. The two-region current predictive control method used in the power quality control device is described, as well as the functions and implementation methods of each module of APF. The device model is built on the MATLAB/Simulink software and the functional simulation is carried out. The design of the main circuit parameters, the auxiliary circuit of the analog harmonic generator and the circuit based on the digital signal processing (DSP) chip are built up to verify the feasibility of the design. In the research of system algorithm, harmonic current detection algorithm based on instantaneous reactive power theory is adopted. The conventional Pi control algorithm and the double region current predictive control method are used in the inner loop current control. Firstly, based on the analysis of the traditional three-level space vector pulse width modulation (SVPWM) algorithm, the space Vector Pulse Width modulation (SVPWM) algorithm is introduced. In this paper, a simplified three-level SVPWM modulation algorithm is studied. The algorithm does not need trigonometric function calculation, and the neutral-point potential control does not increase the complexity of the algorithm, which greatly reduces the running time of the DSP program, and then in order to improve the compensation performance of APF, When the compensation current error is small (steady state), the inner loop current control algorithm is used to simplify the three-level SVPWM modulation algorithm. When the compensation current error is large (transient), the outer loop current control is used to minimize the error. In order to improve the real-time performance of APF, a simple predictive control is added to the algorithm. A three-level APF simulation model based on two-region predictive control algorithm is built and simulated, which proves that the principle of the algorithm is correct. The hardware circuit is composed of digital signal control chip TMS320F2812, external driving circuit, current sensor and voltage sensor. The whole hardware circuit is realized by modularization, which makes the whole circuit easy to debug. The structure design is simple and the design cost is low.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761;TN713.8

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