三相主動前端轉換器之研究

A Study of Three-Phase Active front-end Converters

李毓晏(Yu-Yen Li)

指導教授 ： 鄭博泰

國立清華大學/電機資訊學院/電機工程學系/碩士(2006年)

https://doi.org/10.6843/NTHU.2006.00571

摘要

近年來，用電環境的複雜化以及使用許多的非線性負載，從供電端引入大量的電壓與電流諧波，導致整個電力線路含有電壓與電流諧波失真而降低了電力品質。為了應付此一問題，各種不同的工業規範如IEEE 519-1992、IEC 61000-3-2均有提出如何調控電壓與電流諧波失真。主動前端轉換器(active front-end converter, AFE)具有可控式直流電壓、可控式功率因數(功因超前、落後或為1)、雙向電力潮流控制(整流與反流)，以及轉換器三相交流端電流波形近似弦波的低電流諧波失真。基於上述特點並且達到工業規範所提出的要求，現今馬達驅動設備應用上大多採用主動前端轉換器來代替傳統橋式二極體前端整流器。

本論文主要探討主動前端轉換器於實驗測試平台原型設計與應用，以及發展實驗系統之閉迴路控制法確認此原型之使用。電流控制方式以預測型電流控制器最適合應用於主動前端轉換器，其對系統操作所需之電流命令精準追隨特性與定頻操作為其最大優點，並以同步旋轉框下作信號回授控制可達到零穩態誤差之優點。另外，開發主動前端轉換器之動態模型推導確認實驗系統之暫態與穩態響應行為。若於電流控制器之電流命令加入負載電流前饋項以及轉換器輸出電壓命令加入解耦合項，將可獲得理想之直流鏈電壓升壓控制。實驗測試結果將確認系統控制設計之性能以及動態模型推導之準確性。

關鍵字

主動前端轉換器

並列摘要

Due to the growing application of power electronics loads, a significant amount of voltage and current harmonics are injected into the power system and the quality of electric power is degraded as a result. To address this issue, various industry standards, such as IEEE 519-1992, IEC 61000-3-2 are introduced to regulate the voltage and current harmonic distortions. For motor drives applications, more and more active front-end converters have been adopted to replace the conventional diode rectifier front-ends to meet these requirements. In addition to its unity power factor operation, the active front-end converter also has the advantage of bi-directional power flow to allow energy regeneration from the DC side to the unity. In this thesis, an active front-end converter prototype is designed and implemented in the laboratory. A closed-loop control method is developed and verified using this prototype. A dynamic model of the active front-end converter is also developed to identity its transient and steady state behavior. Laboratory test results are presented to validate the performance of the control design and the accuracy of the dynamic modeling.

並列關鍵字

active front-end converter

參考文獻

[1] V. Blasko and V. Kaura, "A novel control to actively damp resonance in input LC filter of a three-phase voltage source converter," IEEE Transactions on Industry Applications, vol. 33, pp. 542-550, 1997.

[2] V. Blasko and V. Kaura, "A new mathematical model and control of a three-phase AC-DC voltage source converter," IEEE Transactions on Power Electronics, vol. 12, pp. 116-123, 1997.

[3] P. A. Dahono, Y. R. Bahar, Y. Sato, and T. Kataoka, "Damping of transient oscillations on the output LC filter of PWM inverters by using a virtual resistor," in Power Electronics and Drive Systems, 4th IEEE International Conference, vol.1, pp. 403-407, 2001.

[5] M. Liserre, F. Blaabjerg, and S. Hansen, "Design and control of an LCL-filter-based three-phase active rectifier," IEEE Transactions on Industry Applications, vol. 41, pp. 1281-1291, 2005.

[6] M. P. Kazmierkowski and L. Malesani, "Current control techniques for three-phase voltage-source PWM converters: a survey," IEEE Transactions on Industrial Electronics, vol. 45, pp. 691-703, 1998.