三相光伏逆变器的智能控制技术的研究

发布时间：2018-04-04 05:44

本文选题：启动阶段　切入点：稳定运行阶段　出处：《安徽大学》2015年硕士论文

【摘要】：本文将三相光伏逆变器的运行划分为两个阶段：启动阶段和稳定运行阶段。针对不同运行阶段开展研究,论文的主要内容如下：1、结合逆变器的启动特点,设计了改进模糊PID控制器参数的整定原则,以偏差和偏差变化率作为模糊推理的输入,引入启动斜坡函数完成度,仿真结果表明可以提高逆变器启动过程的动态和稳态性能,缩短调节时间,并减小超调量。2、在稳定运行阶段采用基于电容电压微分反馈的重复控制策略,设计了电容电压微分的计算模块,使用电容电压作为控制外环,其微分作为控制内环。仿真结果表明此控制方法可以克服电容电流闭环控制抗干扰性差的缺点,减少检测量。3、介绍了三相光伏逆变器的硬件和软件的实现过程,并实现了改进型模糊控制和电容电压微分反馈重复控制的智能控制方案,通过对比实验,验证了控制算法的有效性。
[Abstract]:In this paper, the operation of three phase photovoltaic inverter is divided into two stages: start-up phase and stable operation stage.The main contents of this paper are as follows: 1. According to the characteristics of the inverter, the tuning principle of the improved fuzzy PID controller parameters is designed. The deviation and the variation rate of the deviation are used as the input of fuzzy reasoning.The simulation results show that the dynamic and steady-state performance of the inverter can be improved and the adjusting time can be shortened by introducing the completion degree of the starting slope function.At the stage of steady operation, the repetitive control strategy based on the differential feedback of capacitor voltage is adopted, and the calculation module of capacitance voltage differential is designed. The capacitor voltage is used as the outer control loop and the differential is used as the internal control loop.The simulation results show that this control method can overcome the disadvantages of poor anti-interference performance of capacitive current closed-loop control and reduce the detection of .3. the realization process of hardware and software of three-phase photovoltaic inverter is introduced.The intelligent control scheme of improved fuzzy control and capacitive voltage differential feedback repetitive control is implemented. The effectiveness of the control algorithm is verified by comparison experiments.
【学位授予单位】：安徽大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM464

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