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An Integration of Solar Photovoltaic Generation to Three-Phase Utility Using Adaptive Control Algorithm

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Journal of The Institution of Engineers (India): Series B Aims and scope Submit manuscript

Abstract

This paper deals with the modified weighted least-mean square (LMS) control strategy for single-stage, solar photovoltaic (PV) grid-integrated system to enhance the power quality at common coupling point. This control algorithm has fast convergence, fewer oscillations, fast dynamic response, and good steady-state performance than the other LMS-based control algorithm. The incremental conductance-based maximum power point tracking technique is used to obtain the crest power from the PV array, which is used to sustain DC link voltage by proportional–integral controller. The fundamental component of load current is extracted using this proposed control technique to estimate the reference currents of grid. This proposed control algorithm addresses various power quality concerns such as harmonics reduction, power factor correction, and load unbalancing. The VSC of PV array-interfaced grid system feeds real power to the loads, and surfeit real power is injected into the distribution network. The dynamic performance of proposed single-stage PV-fed three-phase system is validated into the MATLAB\Simulink environment at nonlinear loads, and simulated results are validated with test results on an experimental prototype at different environmental conditions such as varying solar irradiation and load unbalancing. Test results are found satisfactory, and total harmonic distortions of grid currents are observed well within limits of the IEEE-519 standard.

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Acknowledgements

This work is supported by Indo-UK SERI-II (RP03357), UKCERI-I (RP03391), and FIST Project (RP03195).

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Authors and Affiliations

  1. Department of Electrical Engineering, J.C. Bose University of Science and Technology, YMCA, Faridabad, India

    Abhishek Kumar & Rashmi Jain

  2. Department of Electrical Engineering, Indian Institute of Technology, Delhi, India

    Seema Kewat & Bhim Singh

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  1. Abhishek Kumar
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  2. Seema Kewat
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  3. Bhim Singh
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Correspondence to Abhishek Kumar.

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Appendix

Appendix

Simulation parameters

Solar panel specifications

Vmpp = 29 V, Impp = 7.35 A, Pmpp = 26.5 kW, Ns = 14, Np = 9

 

DC link voltage

Vdc = 400 V

 

DC link capacitor

Cdc = 2200 μF

 

Grid voltage

VLL = 220 V (rms)

 

Interfacing inductors

3 mH

 

Ripple filter

Rf = 5 Ω, Cf = 10 µF

 

Nonlinear load

3ϕ diode bridge with R = 20 Ω, L = 200 mH

 

PI gain constants

Kpd = − 4, Kid = − 1

 

Parameters

p = 100, ε = 2

 

Step size

μp = 0.015

 

Sample time

Ts = 5 μs

Experimental parameters

PV array

Vmpp = 396 V, Impp = 9.6 A, Pmpp = 3.8 kW

 

DC link voltage

Vdc = 400 V

 

DC link capacitor

Cdc = 2200 μF

 

Grid voltage

VLL = 220 V (rms)

 

Interfacing inductors

3.5 mH

 

Ripple filter

Rf = 6 Ω, Cf = 15 µF

 

Nonlinear load

3ϕ diode bridge with 2.1 kW

 

PI gain constants

Kpd = 0.25, Kid = 0.0001

 

Parameters

p = 100, ε = 2

 

Step size

μp = 0.015

 

Sample time

Ts = 5 μs

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Kumar, A., Kewat, S., Singh, B. et al. An Integration of Solar Photovoltaic Generation to Three-Phase Utility Using Adaptive Control Algorithm. J. Inst. Eng. India Ser. B 101, 43–54 (2020). https://doi.org/10.1007/s40031-020-00433-0

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  • DOI: https://doi.org/10.1007/s40031-020-00433-0

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