無直流鏈電容之電機驅動系統穩定度與效能分析

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研究生：	胡家源 Hu, Jia-Yuan
論文名稱：	無直流鏈電容之電機驅動系統穩定度與效能分析 Stability and Performance Analysis for Capless Motor Drive System
指導教授：	朱家齊 Chu, Chia-Chi
口試委員:	吳有基黃維澤劉建宏
學位類別：	碩士 Master
系所名稱：	電機資訊學院 - 電機工程學系 Department of Electrical Engineering
論文出版年：	2025
畢業學年度：	113
語文別：	中文
論文頁數：	39
中文關鍵詞：	主動電力濾波器、穩定度分析、相位補償、非線性負載
外文關鍵詞：	Active Power Filter, Stability Analysis, Phase Compensate, Non-Linear Load
相關次數：	點閱：113 下載：0
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近代半導體發展迅速，在諸多三相交流電機驅動系統中，大多採用脈波寬度調變的逆變器，並在直流側加上電容器用以穩定電壓，且需考慮成本與系統複雜度，通常於逆變器前級採用三相二極體整流器將三相交流電源轉為直流電。此種架構可視為非線性負載，且會產生大量諧波電流注入電網，電網電流的總諧波失真電流(THDi)無法符合IEEE/Std519-1992規範，即電網電流總諧波失真需在5%內。
為了降低電網電流總諧波失真而加上主動電力濾波器，但是在主動電力濾波器、市電阻抗與非線性負載之間的耦合影響而導致電網電流產生不穩定現象。為了分析系統穩定度及產生不穩定現象的頻率，本論文通過對主動電力濾波器、市電阻抗與非線性負載建立正負序分解模型，並將三者模型結合用以建立整體系統模型，可利於分析整體系統穩定度，以及確認產生不穩定現象的頻率，最後透過在主動電力濾波器設計適當補償機制使得系統回歸穩定。

The development of modern semiconductors has advanced rapidly. In many three-phase AC motor drive systems, pulse width modulation (PWM) inverters are commonly used, with capacitors added on the DC side to stabilize the voltage. Considering cost and system complexity, a three-phase diode rectifier is usually employed at the front end of the inverter to convert the three-phase AC power into DC. This configuration can be regarded as a nonlinear load and generates a significant amount of harmonic current injected into the power grid. The total harmonic distortion current (THDi) of the grid current may not meet the IEEE/Std519-1992 standard, which specifies that the total harmonic distortion of the grid current should be within 5%.
To mitigate the total harmonic distortion of the grid current, an active power filter is introduced. However, the interaction between the active power filter, the grid impedance, and the nonlinear load can lead to instability in the grid current. This thesis addresses this issue by developing positive and negative sequence decomposition models for each component： the active power filter, the grid impedance, and the nonlinear load. By integrating these models into a comprehensive system model, it allows for an analysis of the overall system stability and identification of instability frequencies. Ultimately, suitable compensation mechanisms are designed for the active power filter to ensure the system returns to a stable state.

Abstract.........................................................I
摘要.............................................................II
致謝.............................................................III
目錄.............................................................IV
圖目錄...........................................................VI
表目錄...........................................................VIII
符號表...........................................................IX
簡介...........................................................1
1 研究動機.....................................................1
2 文獻回顧.....................................................1
3 貢獻.........................................................2
4 組織架構.....................................................2
整體系統模型....................................................3
1 主動電力濾波器模型............................................3
1.1 諧波萃取D(s)...............................................5
1.1.1 同步框下二階低通濾波器萃取特定諧波成分......................6
1.1.2 同步框下二階低通濾波器萃取全部諧波成分......................6
1.1.3 靜止框下諧振控制萃取特定諧波成分...........................7
1.1.4 可建模為帶通濾波器之數位濾波器萃取特定諧波成分..............................................................8
1.2 電流控制器Hi(s)............................................8
1.2.1 同步框PI控制器...........................................9
1.2.2 靜止框實係數PR控制器.....................................10
1.2.3 靜止框複係數PR控制器.....................................11
1.2.4 P-SSI-SRF...............................................11
2 非線性負載模型...............................................12
2.1 非線性負載電網側導納........................................13
3 電網阻抗模型.................................................16
系統穩定度分析與相位補償........................................17
1 整體系統訊號流程圖............................................17
2 系統穩定度分析...............................................18
3 相位補償.....................................................23
3.1 連接PCC與非線性負載之電感器.................................25
3.2 諧波萃取D(s)或電流控制Hi(s)之相位補償.......................26
3.3 PCC電壓補償...............................................27
模擬驗證......................................................28
結論與未來方向.................................................36
1 結論........................................................36
2 未來方向....................................................36
參考文獻........................................................37
                                

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