臺灣博碩士論文加值系統

近年來多階電能轉換器由於可有效降低切換損失、提高輸出波形品質、降低濾波元件之容量等優點而日益受到關注。本論文發展一七階直流-交流電能轉換界面，可將再生能源之直流電能轉換為高品質之交流電能，其架構包含一雙輸出直流-直流電能轉換器以及一不對稱T型多階逆變器。不對稱T型多階逆變器包含兩個T型電力電子臂、兩個直流電容及一個濾波電感，兩直流電容之電壓呈倍數關係，藉由兩T型電力電子臂之切換，可以產生一七階之交流電壓，經由濾波電感產生一具弦波電流饋入配電系統，由於該不對稱T型多階逆變器只使用8個電力電子開關便可輸出七階之交流電壓，可減少電力電子開關使用的數量以簡化電路，降低輸出濾波電感之容量。雙輸出直流-直流電能轉換器由一儲能電感及兩電力電子開關所組成，可產生兩個呈倍數關係之直流電壓供給不對稱T型多階逆變器的兩個直流電容。本論文並將以數位訊號處理晶片TMS320F28335以及CPLD ALTERA-EPM1270T144C5N為控制器完成所提出之七階直流-交流電能轉換界面之硬體雛型以驗證其功能。

Recently, multilevel power converters have attracted increasing attention due to the advantages such as reducing switching losses, improving the quality of output waveforms, and reducing the filter capacity. This thesis develops a seven-level power conversion interface to convert the DC power of renewable energy to a high-quality AC power. The seven-level power conversion interface consists of a dual-output DC-DC power converter and an asymmetric T-type multilevel inverter. The asymmetric T-type multilevel inverter is composed of two T-type power-electronic arms, two DC capacitors, and a filter inductor. The voltages of the two DC capacitors are in a multiple relationship. By controlling the T-type power-electronic arms, the asymmetric T-type multilevel inverter will generate a seven-level AC voltage and a sinusoidal current through the filter inductor injecting into the distribution power system. For outputting a seven-level AC voltage, only eight power electronic switches are used in the asymmetric T-type multilevel inverter due to the use of the asymmetric DC voltages. As a result, the power circuit is simplified. The dual-output DC-DC power converter is composed of an energy storage inductor and two power electronic switches, which can generate two DC voltages in a multiple relationship to supply the asymmetric T-type multilevel inverter. This thesis will complete a hardware prototype with a controller of digital signal processor (TMS320F2833) and CPLD (ALTERA-EPM1270T144C5N) to verify the functions of the proposed seven-level power conversion interface.

摘要 I
Abstract II
圖目錄 VI
表目錄 IX
第一章 緒論 1
1-1研究動機與背景 1
1-2 研究目的 3
1-3 論文大綱 4
第二章 多階逆變器 5
2-1 飛輪電容七階逆變器 5
2-2二極體箝位式七階逆變器 13
2-3 疊接橋式七階逆變器 21
2-4 七階逆變器之優缺點 35
第三章 七階直流-交流電能轉換介面 36
3-1 七階直流-交流電能轉換介面之電路架構 36
3-2 雙輸出直流-直流電能轉換器 37
3-2-1 操作原理 37
3-2-2 控制方塊 40
3-3 不對稱T型多階逆變器 41
3-3-1 操作原理 42
3-3-2 控制方塊 48
第四章 控制晶片及損耗模擬 51
4-1 DSP控制晶片 51
4-1-1 ADC轉換模組 52
4-1-2 通用輸入/輸出(GPIO)模組 52
4-1-3 PWM模組 52
4-2 複雜型可程式化邏輯元件(CPLD)控制晶片 53
4-3 損耗模擬與分析 56
4-3-1七階直流-交流電能轉換介面之功率半導體損耗分析 56
4-3-2 PowerSIM損耗模擬 58
4-3-3 傳統五階T型逆變器與不對稱T型多階逆變器功率損耗比較 62
第五章 實驗結果 64
5-1 雙輸出直流-直流電能轉換器之實測結果 66
5-2不對稱T型多階逆變器之實測結果 66
5-3 七階直流-交流電能轉換介面實測結果 70
第六章 結論與未來展望 74
6-1 結論 74
6-2未來展望 75
參考資料 76

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