Current decoupling control strategy for unbalanced input 3-1 matrix converter
-
摘要: 分析了三相-單相矩陣變換器(3-1MC)輸入側低次諧波的產生原因,推導了功率補償拓撲結構下的輸出側與補償側調制函數約束關系式.研究輸入電壓不平衡下,含電容補償單元的3-1MC單網側電流反饋控制策略無法對輸入兩相旋轉坐標軸(dq軸)下的直軸與交軸電流分量實現無靜差控制,提出了在功率補償下對輸入三相電流作正序、負序dq軸分解,分別獨立對輸入雙dq軸下正序、負序電流作解耦內環,輸出側與補償側電壓加權合成為外環的雙閉環控制.實驗與仿真結果均表明該策略不僅使3-1MC具有功率補償功能,而且有效抑制了電壓不平衡引起的輸入電流與輸出電壓所含低次諧波,提高了3-1MC在單相用電場合的實用性.Abstract: The reasons for low-order harmonics in the input current of a 3-1 matrix converter (3-1MC) were analyzed, and the relationship of modulation function between the output side and power compensation side was derived. The single grid-side current feedback control strategy cannot be used to control the input current component without steady state error under unbalanced input. It was proposed that input current positive sequence and negative sequence dq axis decoupling for the inner loop, and output side and compensation voltage weighted synthesis for the outer loop in the double closed-loop decoupling control strategy. The experimental and simulation results show that the proposed scheme not only facilitates power compensation using a 3-1MC but also effectively suppresses low-order harmonics in the input current and the output voltage under unbalanced input. Moreover, the proposed strategy improves the practicality of 3-1MCs.
-
Key words:
- 3-1 matrix converter /
- current decoupling /
- unbalanced /
- positive sequence /
- negative sequence /
- weighted synthesis
-
參考文獻
[2] Miura Y, Amano T, Ise T. Operating characteristics of a threephase to single-phase matrix converter with hybrid control scheme of power compensation and modulation applied to gas engine cogeneration system//Proceedings of the 2011-14th European Conference on Power Electronics and Applications (EPE 2011). Birmingham, 2011:1 [3] Weerasinghe D S B, Madawala U K, Thrimawithana D J, et al. A three-phase to single-phase matrix converter based bi-directional IPT system for charging electric vehicles//ECCE Asia Downunder. 2013:1240 [4] Nguyen-Quang N, Stone D A, Bingham C M, et al. A threephase to single-phase matrix converter for high-frequency induction heating//EPE'09.13th European Conference on Power Electronics and Applications. Melbourne, 2009:1 [5] Mizutani R, Koizumi H, Kamiya E, et al. Development of threephase to single-phase matrix converter for improvement of threephase voltage unbalance in distribution system//2012 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS). Taiwan, 2012:344 [6] Babaei E, Aghagolzadeh A, Hosseini S H, et al. A new structure for three-phase to single-phase AC/AC matrix converters//Proceedings of the 200310th IEEE International Conference on Electronics, Circuits and Systems. Sharjah, 2003:36 [8] Karaman E, Farasat M, Niu F, et al. Three-phase to single-phase super-sparse matrix converters//2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC). Orland, 2012:1061 [9] Ohnuma Y, Itoh J I. Control strategy for a three-phase to singlephase power converter using an active buffer with a small capacitor//IPEMC'09. IEEE 6th International Power Electronics and Motion Control Conference. Wuhan, 2009:416 [12] Yan Y, An H J, Shi T N, et al. Improved double line voltage synthesis of matrix converter for input current enhancement under unbalanced power supply. IET Power Electron, 2013, 6(4):798 [13] Wang X W, Lin H, She H W, et al. A research on space vector modulation strategy for matrix converter under abnormal inputvoltage conditions. IEEE Trans Ind Electron, 2012, 59(1):93 [14] Liu X, Blaabjerg F, Loh P C, et al. Carrier-based modulation strategy and its implementation for Indirect Matrix Converter under unbalanced grid voltage conditions//201215th International Power Electronics and Motion Control Conference. Novi Sad, 2012 -
點擊查看大圖
計量
- 文章訪問數: 688
- HTML全文瀏覽量: 203
- PDF下載量: 20
- 被引次數: 0
下載:
