Three-phase Grid-connected Photovoltaic Power System with Decoupled Control
Authors: Prabesh Raj Ojha, Sunil Simkhada, Yogesh Layalu, Mani Niraula, Dhurba Karki

 Abstract— The world’s energy usage is soaring, and everyone is concerned about this. Conventional sources of energy have taken the largest source over the last few decades. However, in the current context, the power system has prioritized alternative, clean, and sustainable renewable resources. Photovoltaic power generation is widely adopted because of its usability and reliability. In this paper, a three-phase grid-connected photo-voltaic power system with decoupled control is analyzed which allows the separate control of active and reactive power of the inverter by the introduction of decoupling term in the control strategy. Inverter generated reactive power was controlled via q-axis current controller. However, in this work significant changes were not seen. Active current is controlled by varying the dc bus voltage and PI controller to maintain stability. A MPPT is used to extract the maximum power which is fed to the boost converter and inverter terminal respectively. Simulation of 100kWp PV system is performed in MATLAB environment to learn the controlling techniques and result are presented.

Keywords—Grid-connected PV system, Decoupled control MPPT, three phase inverter, Perturb and Observe (P&O) algorithm

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Published In: International Conference on Role of Energy for Sustainable Social Development (RESSD-2022)
Date of Conference: 8th-9th August 2022                                
Conference Location: Bhaktapur, Nepal
Publisher: IEEE Power and Energy Society Nepal Chapter

Cite the paper as:
P. R. Ojha, S. Simkhada, Y. Layalu, M. Niraula, D. Karki, “Three-phase Grid-connected Photovoltaic Power System with Decoupled Control”, International Conference on Role of Energy for Sustainable Social Development, 8th-9th August 2022, Bhaktapur, Nepal