4.5kW 直流無刷發電機之電壓控制與最大功率追蹤

Voltage Control and Maximum Output Power Tracking of a 4.5kW Brushless DC Generator

張修逢(Hsiu-Feng Chang)

指導教授 ： 張淵智

國立中正大學/工學院/電機工程學系/碩士(2013年)

摘要

本論文旨在研製一適用於4.5 kW風力發電系統之直流無刷發電機汲電器，發電機驅動模組由一直流無刷馬達作為原動機帶動另一直流無刷發電機，並經由交流-直流換流器將發電機所產生之變動頻率及電壓之三相電源轉換為固定電壓之直流電源。系統藉由回授直流鏈電壓、發電機之線電流及線電壓，調節發電機之輸出功率，使發電機達到定電流、定功率輸出及穩定直流鏈電壓等功能。本研究採用空間向量脈波寬度調變為基礎之前饋式電流控制法，藉由取樣直流鏈電壓、發電機線電流以及編碼器所提供之位置資訊決定開關之責任率。最後以實測來驗證最大功率追蹤與穩壓之性能。

關鍵字

直流無刷發電機 ； 電流控制 ； 空間向量

並列摘要

This thesis develops a 4.5 kW brushless DC generator drive for wind energy conversion system (WECS). The generator drive system consists of a brushless DC generator driven by a brushless DC motor. In this system, an ac-to-dc inverter is proposed to convert three phase electrical power by generator with varying voltage and varying frequency to DC voltage. The output power of the system is adjusted by detecting the DC-bus voltage as well as the line voltage and line current of the generator. Constant output current, constant output power and DC-bus voltage regulation can be performed by the system. The proposed space-vector based feed-forward current control uses the position information from the absolute encoder, DC-bus voltage and the line current of the generator to determine the instantaneous duty ratios of the power switches. The MPPT performance has been verified by the experimental results.

並列關鍵字

brushless DC generator ； current control ； Space-vector

參考文獻

[2] Md. Arifujjaman, “Modeling, Simulation and Control of Grid Connected Permanent Magnet Generator (PMG)-based Small Wind Energy Conversion System,” IEEE Transactions on Electric Power and Energy Conference (EPEC),pp.1-6, 2010.

[4] Niankun Zhang, Zechang Sun, Jie Zhang, Tiancai Ma and Jiang Wang, “Optimal design for stand-alone wind/solar hybrid power system,” in Proceeding of the International Conference Electronics, Communications and Control (ICECC), pp.4415-4418, 2011.

[5] H. Hakigano, Y. Miura and T. Ise, “Configuration and control of a DC microgrid for residential houses,” in Proc. IEEE T&D Asia, pp.1-4, 2009.

[7] Muangjai, W., Premrudeepreechacharn, S., “Implementation of a Carrier-based Three-dimensional Space Vector PWM Technique for Three-phase Fourleg Voltage Source Converter with Microcontroller,” in Proc. ICIEA, 2009, pp.387-841.

[8] Y.Chen and K. M. Smedley, “One-Cycle-Controlled Three-Phase Grid-Connected Inverters and Their Parallel Operation,” IEEE Transactions on Industrial Electronics, vol.44, no.2, pp.663-671, 2008.