100 kVA三相四線雙向轉換器數位控制研究

方琮弼

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100 kVA三相四线双向转换器数位控制研究

Research on Digital Control for 100 kVA Bi-directional Three-Phase Four-Wire Converter

方琮弼 , 硕士　　导师：吴财福　　

繁体中文

三相四线转换器；分切合整数位控制；电感值变化； three-phase four-wire converter ； division-summation digital control ； inductance variation

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摘要 │ 参考文献 (30) │ 国际计量

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This thesis focuses on studying digital controls of bi-directional three-phase four-wire converters. Division-summation (D-Σ) digital control and one-sixth line-cycle regulation approach (OSLCRA) for a high power bi-directional three-phase four-wire converter are adopted. The converter has four kinds of operation modes: rectification mode, grid-connection mode, dc-link voltage regulation mode and ac voltage regulation mode. In the grid-connection mode, power is transformed into ac and injected into the utility grid. In the rectification mode, power from the utility grid is transformed into dc to supply dc loads and replenish dc-link capacitors. Under the grid-connection mode and the rectification mode, the converter is considered as a current source. In ac regulation mode, the power is transformed into ac to supply ac loads, and the converter is considered as a voltage source served as an ac emergency source.
The D-Σ digital control is based on a current variation direct digital control, summarizing the filter inductance-current variations over one switching cycle to derive control law, which can release the limitation of abc to dq frame transformation. Besides, it takes inductance variation into consideration, and the core size can be reduced significantly and efficiency can be improved. This thesis presents design and derivation of the controller for converter. And then, description of program flowcharts and considerations of hardware implementation are presented. Finally, the converter operation modes are verified with simulated and experimental results.
There are two major contributions of this research: analyzing and comparing control approaches for bi-directional three-phase four-wire converters, and applying the D-Σ digital control to a 100 kVA and presenting considerations of hardware implementation during experimental process to overcome the problems caused by non-ideal characteristics of the components.

参考文献 ( 30 ) 〈TOP〉

[1]REN21, “Renewables 2015 Global Status Report”, May. 2015
连结：
[2]S. R. Bull, “Renewable energy today and tomorrow”, Proceedings of the IEEE, Vol. 89, No. 8, pp. 1216-1226, Aug. 2001.
连结：
[4]D. Zhao, Y. Li and Y. Liu, “Optimal design and sensitive analysis of distributed generation system with renewable energy sources”, China International Conference on Electricity Distribution, pp. 456-460, Sept. 2014.
连结：
[5]J. W. Choi and S. K. Sul, “Fast current controller in three-phase AC/DC boost converter using d-q axis crosscoupling”, IEEE Trans. on Power Electronics, Vol. 13, No. 1, pp. 179-185, Jan. 1998.
连结：
[6]J. A. Torrico and E. Bim, “Fuzzy logic space vector current control of three-phase Inverters”, IEEE Proceedings on Electric Power Applications, Vol. 1, pp. 147-152, Jun. 2000.
连结：

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引用含有DOI的文献

DOI可强化引用精确性、增强学术圈连结，并给予使用者跨平台的良好使用经验，目前在全世界已有超过五千万个对象申请DOI。 如想对DOI的使用与概念有进一步了解，请参考 （ ） 。

DOI可强化引用精确性、增强学术圈连结，并给予使用者跨平台的良好使用经验，目前在全世界已有超过五千万个对象申请DOI。如想对DOI的使用与概念有进一步了解，请参考（）。