本文選題：啟動階段　切入點：穩(wěn)定運行階段　出處：《安徽大學》2015年碩士論文

【摘要】：本文將三相光伏逆變器的運行劃分為兩個階段：啟動階段和穩(wěn)定運行階段。針對不同運行階段開展研究,論文的主要內(nèi)容如下：1、結(jié)合逆變器的啟動特點,設(shè)計了改進模糊PID控制器參數(shù)的整定原則,以偏差和偏差變化率作為模糊推理的輸入,引入啟動斜坡函數(shù)完成度,仿真結(jié)果表明可以提高逆變器啟動過程的動態(tài)和穩(wěn)態(tài)性能,縮短調(diào)節(jié)時間,并減小超調(diào)量。2、在穩(wěn)定運行階段采用基于電容電壓微分反饋的重復控制策略,設(shè)計了電容電壓微分的計算模塊,使用電容電壓作為控制外環(huán),其微分作為控制內(nèi)環(huán)。仿真結(jié)果表明此控制方法可以克服電容電流閉環(huán)控制抗干擾性差的缺點,減少檢測量。3、介紹了三相光伏逆變器的硬件和軟件的實現(xiàn)過程,并實現(xiàn)了改進型模糊控制和電容電壓微分反饋重復控制的智能控制方案,通過對比實驗,驗證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.
【學位授予單位】：安徽大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM464

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相關(guān)期刊論文 前2條

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本文編號：1708616