三相并联型有源电力滤波器研究

发布时间：2018-01-22 16:53

本文关键词： 有源电力滤波三相三线双同步解耦锁相 SVPWM DSP处理器　出处：《西南交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：面对大量非线性负载及电力电子变流器设备和其他谐波源带来的对电网越来越广泛的谐波污染,采用有源电力滤波器(Active Power Filter APF)抑制谐波必将是今后谐波治理的一个重要的发展方向。有源电力滤波器具有动态性能好,能够灵活的根据谐波源状态自动调整等优点,在电能质量调节方面具有很广阔的应用前景。随着理论研究的进一步深入,电力电子器件容量和开关频率的进一步提高以及数字信号处理器运算能力进一步增强,有源电力滤波器的容量及实时补偿实时性将进一步得到提高。本文主要对三相三线并联型有源电力滤波器的谐波检测算法及其控制策略从以下几个方面进行了探讨、分析和研究：首先,对谐波问题及其抑制措施进行了简要介绍,指出了有源电力滤波器对谐波抑制及电能质量提高的重要意义。介绍了目前常用的有源电力滤波器的基本原理、常见结构、谐波检测方法、电流跟踪控制策略及其应用场合。分析发现三相三线并联型有源电力滤波器有着更普遍的适用性和良好的应用前景。其次,深入研究了由瞬时无功功率理论衍生出的pq法和ip-iq两种谐波检测算法,对两种方法的谐波检测效果进行了对比。分析发现当电压畸变的时候pq法存在的误差和不足以及此时ip-iq法表现出的的优点,指出了锁相环是避免电压畸变导致谐波检测误差的关键。为此对锁相环进行了深入研究,简要介绍了几种常用的锁相环。对典型的基于单同步坐标的三相锁相环进行了深入研究,指出其在三相电压畸变不平衡时的误差和不足,为此引入了基于双同步坐标解耦的三相锁相环,并从新的角度对其解耦策略进行了推导。再次,建立了三相三线并联型APF的数学模型,据此给出其控制策略。对常用的滞环控制、三角载波控制、SVPWM三种电流跟踪控制策略进行了对比仿真分析,并对SVPWM的数字化编程实现进行了详细推导。对APF主电路参数对补偿效果的影响进行了分析,并给出了一种主电路设计的方法和控制电路的软硬件设计方案。最后,根据主电路设计方法和控制电路的软硬件设计方案,搭建了实验样机进行实验,在TMS320F2812数字信号处理器中通过C语言编程实现了谐波检测算法及SVPWM算法。
[Abstract]:In the face of a large number of nonlinear loads and power electronic converter equipment and other harmonic sources to bring more and more widespread harmonic pollution to the power grid. Active Power Filter APF). Harmonic suppression will be an important development direction of harmonic control in the future. Active power filter has good dynamic performance. Can flexibly adjust according to the harmonic source state and other advantages, in the power quality regulation has a very broad application prospects. With the further study of the theory. The capacity and switching frequency of power electronic devices are further improved and the computing power of digital signal processor is further enhanced. The capacity and real-time compensation of active power filter will be further improved. This paper mainly discusses the harmonic detection algorithm and control strategy of three-phase three-wire shunt active power filter from the following aspects. Beg. Analysis and research: first of all, the harmonic problem and its suppression measures are briefly introduced. The significance of active power filter to harmonic suppression and power quality improvement is pointed out. The basic principle, common structure and harmonic detection method of active power filter are introduced. Current tracking control strategy and its applications. The analysis of three-phase three-wire shunt active power filter has more general applicability and good application prospects. Secondly. Two harmonic detection algorithms, namely, PQ method and ip-iq, derived from instantaneous reactive power theory, are studied in depth. The harmonic detection results of the two methods are compared. It is found that when the voltage is distorted, the error and deficiency of the PQ method and the advantages of the ip-iq method at this time are also found. It is pointed out that PLL is the key to avoid harmonic detection error caused by voltage distortion. Several commonly used phase-locked loops are briefly introduced. The typical three-phase phase-locked loops based on single synchronous coordinates are deeply studied, and their errors and shortcomings in unbalanced three-phase voltage distortion are pointed out. For this reason, a three-phase phase-locked loop based on double synchronous coordinate decoupling is introduced, and its decoupling strategy is deduced from a new angle. Thirdly, the mathematical model of three-phase three-wire parallel APF is established. According to this, the control strategy is given, and three common current tracking control strategies, hysteresis control and triangular carrier control, SVPWM, are compared and analyzed. The realization of digital programming of SVPWM is deduced in detail, and the effect of main circuit parameters of APF on compensation effect is analyzed. At last, according to the main circuit design method and the control circuit hardware and software design scheme, the experiment prototype is built. Harmonic detection algorithm and SVPWM algorithm are realized by C language programming in TMS320F2812 digital signal processor.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM761;TN713.8

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