直流微電網之雙向換流器研製

Research and Implementation of a Bi-directional Inverter for DC Micro-Grid

陳廣哲(Kuang-Che Chen)

指導教授 ： 陳耀銘

國立臺灣大學/電機資訊學院/電機工程學研究所/碩士(2011年)

https://doi.org/10.6342/NTU.2011.00388

摘要

本論文研製一組具遠端監控功能之直流微電網雙向換流器，可操作在市電併聯模式(Grid-Tied Mode；GTM)及功因校正模式(Power Factor Collection Mode；PFCM)，作為直流微電網與市電電網間能量傳遞界面。本論文之雙向換流器使用Microchip公司出廠的微控制器dsPIC30F2020做為控制核心，以實現非同步和差調變(Asynchronous Sigma-Delta Modulation；ASDM)之電流控制技術。ASDM電流控制的操作原理及公式推導，在本論文中亦有詳細說明。
在ASDM電流控制之下，本論文分別對市電併聯模式及功因校正模式做詳細地開關切換分析，並說明程式內部執行流程及雙向換流器之周邊電路。實作電路上透過EIA-485通訊界面，實現遠端電腦監控換流器之操作狀態及下達雙向功率傳輸命令之功能。最後，實際製作一台5kW的市電併聯雙向換流器，透過電腦模擬與硬體實作，驗證本文所提理論之正確性及可行性。

關鍵字

雙向換流器 ； 市電併聯 ； 功因校正 ； 非同步和差調變 ； EIA-485

並列摘要

A bi-directional grid-tied inverter for DC micro-grid with remote monitoring and control is presented in this thesis. The proposed inverter can be operated in either grid-tied mode (GTM) or power factor correction mode (PFCM) to regulate the power demand of the DC micro-grid. The Microchip micro-controller dsPIC30F2020 from Microchip Inc. is adopted to realize the controller of the inverter with the asynchronous sigma-delta modulation (ASDM) current control. The operation principle and the mathematical derivation of the ASDM are introduced.
With the ASDM control, the GTM and PFCM operations for the proposed grid-tied inverter are explained in this thesis. Also, the flow chart of the control program and the functions of the auxiliary circuits are all described. The EIA-485 communication protocol is adopted to fulfill the remote monitoring and the power flow control of the proposed bi-directional grid-tied inverter. Finally, a 5kW bi-directional grid-tied inverter for DC micro-grid is built and tested. The simulated and the experimental results are presented to verify the performance of the prototype circuit.

並列關鍵字

Bi-directional Inverter ； Grid-Tied ； Power Factor Collection ； Asynchronous Sigma-Delta Modulation ； EIA-485

參考文獻

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