A New PI Algorithm for Single Stage Three-Phase Grid-Connected Photovoltaic Inverter Based on Power Feed-Forward

Wang, Yuepeng; Yan, Zhaoyang; Zhang, Zhe; Gu, Haibo; Gao, Yanni

doi:10.1109/imccc.2015.222

Cited by 1 publication

(3 citation statements)

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“…Also, C is the DC bus filter capacitor, and L e stands for the possible reverse electromotive force (when the load is a generator). The control objectives of the three-phase grid-connected inverter are as follows: (1) to stabilize the DC bus voltage, and the dynamic response is fast; (2) to achieve sinusoidal current of the grid side, and the power factor is high. Therefore, voltage and current closed-loop method can be used to control the system.…”

Section: Control Of Grid-connected Invertermentioning

confidence: 99%

“…Three-phase grid-connected inverter can achieve sinusoidal current, unity power factor operation, and DC-AC conversion [1], so it plays a significant role in research and application. Three-phase grid-connected inverter often uses two control loops with PID regulator [2].…”

Section: Introductionmentioning

confidence: 99%

“…can first use the ORA method to fit the differential operator1 In this case, the slope of the amplitude-frequency characteristic outside the approximation range is increased by -20 dB/dec, while maintaining the original characteristic inside the range.Assuming that the approximation frequency range is ORA method is shown inFig. 9.5Copyright © 2017 ASMEDownloaded From: http://proceedings.asmedigitalcollection.asme.org/ on 11/13/2017 Terms of Use: http://www.asme.org/about-asme/terms-of-use…”

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Design and Application of Fractional Order PIλDµ Controller in Grid-Connected Inverter System

Pan

Wang

Hoang

et al. 2017

Volume 9: 13th ASME/IEEE International Conference on Mechatronic and Embedded Systems and Applications

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In comparison with the traditional controller PID, the fractional order controller PIλDμ is added with two parameters (μ and λ), that increases the flexibility of the controller. The larger adjustable space makes it more favorable to the control of the nonlinear system like the three-phase grid-connected inverter. However, since the fractional calculus operator is an irrational function on the complex plane, it can’t be implemented directly in simulation or in practical applications. In this paper, the advantages of the fractional order controller PIλDμ will be analyzed, then the fractional calculus operator is fitted by the frequency domain analysis method. Based on the vector method, the fractional order controller PIλDμ of the grid-connected inverter is designed. Simultaneously, the optimal controller parameters are searched with the ITAE and IAE as the performance index. And finally, the results are compared with those of the traditional controller PID. In consideration of the defects of fractional algorithm and single discretization method, a hybrid discretization method is proposed in order to ensure that the discretized controller can keep the same time-domain response and frequency characteristics as the designed controller. The experimental results show that the proposed method has the dynamic and static characteristics better than the traditional controller PID, which proves that the application of fractional order controller in three-phase grid-connected inverter is effective and feasible.

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Section: Control Of Grid-connected Invertermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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