并联型多电平有源电力滤波器控制策略的研究

发布时间：2018-06-28 07:08

本文选题：多电平滤波器 + 谐波检测　；参考：《东北石油大学》2016年硕士论文

【摘要】：本文主要研究的重点是并联型多电平有源滤波器系统的电路拓扑结构和控制策略。首先对有源电力滤波器当前的研究现状和未来发展的趋势进行阐述,之后分别介绍它的各种类型及其拓扑结构,介绍APF的工作原理和几种拓扑结构及其特点,综合比较集种多电平有源滤波器的原理与电路优缺点,针对本文选用的级联型多电平主电路结构进行模型分析。其次,针对几种常用的谐波检测方法进行比较论述,并详细介绍了基于瞬时无功功率理论的p-q、ip-iq检测法的检测原理,针对ip-iq检测法提出一种改进方法,省略检测环节的锁相环节,提高检测精度,缩短检测时间,并采用MATLAB/SIMULINK仿真软件进行比较仿真验证其可行性。再次,本文分析了并联型有源电力滤波器的控制策略,简述滞环控制、三角波比较跟踪控制、空间矢量脉宽调制、模糊控制、神经网络控制、Sigma-delta调制法以及特定谐波消去法特性及优缺点。比较分析确定本文采用特定谐波消去法(Selective Harmonic Elimination Pulse Width Modulation,SHEPWM),详细论述SHEPWM的系统构成、控制原理以及控制特性,并在此基础上针对SHEPWM的控制精度,引入果蝇优化算法,提高SHEPWM的控制效果。最后,使用MATLAB分别对并联多电平有源滤波器模型进行仿真。仿真结果表明,本文提出检测方法和控制方法的正确性和有效性。针对于负载不变与变化的多种情况下,均能具有良好的谐波补偿效果,具有良好的发展前景。
[Abstract]:This paper focuses on the circuit topology and control strategy of shunt multilevel active filter system. In this paper, the current research situation and future development trend of APF are introduced, then its various types and topological structures are introduced, and the working principle, several topologies and their characteristics of APF are introduced. The principle, advantages and disadvantages of multilevel active filter are compared, and the model of cascaded multilevel main circuit is analyzed. Secondly, several common harmonic detection methods are compared and discussed, and the detection principle of p-qnip-iq detection method based on instantaneous reactive power theory is introduced in detail, and an improved method for ip-iq detection method is proposed to omit the phase-locked loop link of the detection link. The accuracy of detection is improved and the detection time is shortened. The feasibility of this method is verified by MATLAB / Simulink simulation software. Thirdly, the control strategy of shunt active power filter is analyzed, including hysteresis control, triangle wave comparison tracking control, space vector pulse width modulation, fuzzy control, etc. The characteristics, advantages and disadvantages of Sigma-delta modulation method and specific harmonic elimination method are controlled by neural network. By comparing and analyzing, it is determined that this paper adopts the selective harmonic elimination pulse width modulation (SHEPWM) method, and discusses in detail the system structure, control principle and control characteristics of the ShePWM. On this basis, the optimal algorithm of Drosophila is introduced according to the control accuracy of the ShePWM. The control effect of ShePWM is improved. Finally, the parallel multilevel active filter model is simulated by MATLAB. The simulation results show that the detection method and the control method are correct and effective. In view of the load invariance and change, all can have good harmonic compensation effect, and have a good development prospect.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM761

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