SAPF检测与控制算法的优化和实现研究

发布时间：2017-12-27 15:07

本文关键词：SAPF检测与控制算法的优化和实现研究　出处：《辽宁工程技术大学》2015年硕士论文　论文类型：学位论文

【摘要】：并联有源电力滤波器SAPF是谐波治理的主趋势。本文主要针对DQ检测的锁相问题、SVPWM控制的实时性问题、LCL并网滤波器的谐振峰问题这三部分关键技术进行优化和实现研究,以满足SAPF对电网谐波补偿的实时性、准确性本文重点对SAPF的检测技术、控制技术、并网技术进行分析、改进以及实现。针对DQ检测的锁相问题,提出具有鲁棒性的单相数字软件锁相环PLL,该软件锁相环对电网的相位跟踪结果不受电压畸变的影响,对电网具有良好的适应性；针对传统SVPWM控制的实时性问题,提出优化电压空间矢量SVPWM算法,在继承传统SVPWM算法高效率、低损耗、动态性能好等特点的基础上,提出改进运算方式,能够有效地降低算法在CPU中的运行速度,以提高对谐波补偿的实时性；针对LCL并网滤波器存在的谐振峰问题,提出RC并联LCL系统增阻尼法,具有高阻尼、低损耗、低成本、滤波特性好等特点,以改善SAPF并网波形质量、提高系统运行效率。本文在对关键技术提出优化改进的同时,进行MATLAB仿真、DSP编程、样机试验,以确保每一项改进方案应用到SAPF中的可行性,以及最终SAPF对谐波动态抑制的实际效果。本文的研究成果,为有效实现煤矿谐波与无功动态补偿提供理论基础,对净化畸变电网、改善系统品质具有一定的实用价值与重要的研究意义。
[Abstract]:Parallel active power filter (SAPF) is the main trend of harmonic control. This paper focuses on the detection of DQ and SVPWM phase locking of the real time control of the problem, LCL grid filter Xie Zhenfeng in the three part of the key technologies to optimize the research and implementation of SAPF, to meet the harmonic compensation accuracy of real-time, this paper focuses on the SAPF detection technology, control technology, network technology, improvement and analysis to achieve. Aiming at the problem of DQ phase-locked detection, proposed single-phase digital robust software phase-locked loop PLL, the software phase locked loop tracking results for the grid is not affected by voltage distortion, has a good adaptability to the network; to solve the real-time problem of traditional SVPWM control, puts forward the optimization of voltage space vector SVPWM algorithm, based on the characteristics of inheritance the traditional SVPWM algorithm with high efficiency, low loss, good dynamic performance and so on, put forward the operation mode, can effectively reduce the algorithm in the CPU speed, in order to improve the real-time performance of harmonic compensation; the resonant peak problem of LCL grid filter, proposes the damping method of RC parallel LCL system, has the characteristics of high damping low loss, low cost, good filtering characteristics, to improve the SAPF grid waveform quality, and improve the system efficiency. Based on the optimization and improvement of key technologies, MATLAB simulation, DSP programming and prototype test are carried out to ensure the feasibility of each improvement plan applied to SAPF and the practical effect of SAPF on harmonic suppression. The research results in this paper provide a theoretical basis for effective realization of dynamic harmonic compensation and reactive power compensation in coal mines, which is of practical value and important research significance for decontamination of distorted power grids and improvement of system quality.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM761

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