臺灣博碩士論文加值系統

本文旨在發展變頻器前級部份的雙向交流/直流轉換器，系統採用電壓空間向量調變控制之整流器架構，轉換器之控制均在同步旋轉座標系統下，採用多迴路控制，其中包括電流內迴路與電壓外迴路，用以達到快速響應之目的。內迴路部分利用直接電流控制法及電壓解耦控制器達到電流追縱控制；外迴路部分主要控制輸出電壓使之達到命令電壓，並利用功率平衡控制法來達到瞬間功率平衡。本文所發展之轉換器提升輸入功因至接近單位功因，降低輸入電流總諧波失真至5%以下。其次抑制低次諧波，藉此減少諧波污染。
本文系統之規格為： ， ，輸出功率為 ，最高載波頻率為 ，功率因數高於0.9，電流總諧波失真小於5%。模擬部分利用Matlab® -Simulink®及所建立之控制理論模擬系統響應，模擬完成後即與實作結合驗證，實作部分採用 數位控制板作為主控核心，以電壓空間向量調變(Space Vector Modulation, SVM)技術產生三相輸出，藉此控制轉換器開關狀態。
為了減少感測器之數量，文中提出以估測方式取代直流輸出端電流，經模擬與實測結果均驗證本文所提控制方法的可行性。

The thesis is dedicated to the design and implementation the bi-directional AC/DC converters for the front-end of inverter. The developed converter is modulated by space vector modulation and the related controlled quantities are referred to synchronous frame. The controller consists of multiple control loops, which include inner current loop and external voltage loop to achieve fast response. The inner loop is based upon direct current control and the voltage decouple to achieve current tracking, and the external loop controls the output voltage to follow the desired DC voltage value by balancing of instantaneous power between input and output. The developed converter improves the input power factor to approximate unity power factor and reduces the total harmonic distortion of current less than 5%. The low order harmonics are reduced and thereby decreasing the harmonic pollution.
The specifications of the system include: the input voltage is AC 220 V/60 Hz, output power 1 kW, carrier frequency is 15 kHz, power factor is higher than 0.9, and the total harmonic distortion of current is less than 5%. The simulation software is developed based upon the platform of Matlab® -Simulink® and the experimental set-up is based on the dSPACE digital control board. The power devices of converter are controlled by the three-phase gating signals generated by space vector modulation technique.
To reduce the number of sensor, a current estimation method is proposed to give the DC-link current. The feasibility of the proposed method is verified by simulation and experimental results.

中文摘要…………………………………………………………………………..….i
英文摘要……………………………………………………………………………...ii
誌謝………………………………………………………………………………..…...iii
目錄…………………………………………………………………………………….iv
表目錄………………………………………………………………………………….v
圖目錄………………………………………………………………………………….vi
第一章 緒論………………………………………………………………………...1
1.1 研究動機……………………………………………………………….….1
1.2 研究背景……………………………………………………………….….1
1.3 論文大綱…………………………………………………….…………….4
第二章 雙向交流/直流轉換器之數學模式與電流控制……………………….…...6
2.1 雙向交流/直流轉換器數學模式………………………………………….6
2.1.1 數學模型及座標系統轉換………………………………………….8
2.2 電流控制…………………………………………………………………..12
2.2.1 電流控制方法之回顧……………………………………………….12
2.2.2 電壓解耦及電流控制……………………………………………….13
第三章 功率回授分析與輸出直流電流估測……………………………………….17
3.1 功率平衡之控制技術………………………………………………..……17
3.1.1 直流電壓回授控制………………………………………………….17
3.1.2 直流輸出功率回授控制………………………………………..…...19
3.1.3 系統功率回授分析………………………………………………….20
3.2 電流估測之方法……………………………………………………….….26
3.3 對稱型式與非對稱型式……………………………………………….….28
第四章 系統參數設計……………………………………………………………….32
4.1 控制器參數設計……………………………………………………….….32
4.2 電感器設計…………………………………………………………….….36
第五章 實驗系統與結果…………………………………………………………….41
5.1 軟體發展之實驗平台………………………………………………….….41
5.2 模擬結果……………………………………………………………….….43
5.3 實測結果……………………………………………………………….….53
第六章 結論與未來研究方向……………………………………………………….65
參考文獻……………………………………………………………………………….66

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