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Energies 2018, 11(2), 296; https://doi.org/10.3390/en11020296

Generalized Dynamical Modeling of Multiple Photovoltaic Units in a Grid-Connected System for Analyzing Dynamic Interactions

Electrical Power & Energy Systems Research Laboratory (EPESRL), School of Engineering, Deakin University, Geelong, VIC 3216, Australia
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Received: 10 January 2018 / Revised: 19 January 2018 / Accepted: 20 January 2018 / Published: 27 January 2018
(This article belongs to the Section Energy Sources)
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Abstract

This paper aims to develop the generalized dynamical model of multiple photovoltaic (PV) units connected to the grid along with the dynamic interaction analysis among different PV units. The dynamical models of multiple PV units are developed by considering three different configurations through which these PV units are connected to the grid. These configurations include: (a) the direct connection of multiple PV units to the grid; (b) the connection of multiple PV units to the grid through a point of common coupling (PCC); and (c) the connection of PV units without a PCC. The proposed modeling framework provides meaningful insights for analyzing dynamic interaction analysis where these interactions from other PV units are expressed in terms of voltages and line impedances rather than the dynamics of currents. The dynamic interactions among different PV units for all these configurations are analyzed using both analytical and simulation studies. Simulations are carried out on an IEEE 15-bus test system and dynamic interactions are analyzed from the total harmonic distortions (THDs) in the current responses of different PV units. Both analytical and simulation studies clearly indicate that the effects of dynamic interactions are prominent with the increase in PV units. View Full-Text
Keywords: dynamical modeling; dynamic interactions; multiple PV units; grid-connected system dynamical modeling; dynamic interactions; multiple PV units; grid-connected system
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Orchi, T.F.; Mahmud, M.A.; Oo, A.M.T. Generalized Dynamical Modeling of Multiple Photovoltaic Units in a Grid-Connected System for Analyzing Dynamic Interactions. Energies 2018, 11, 296.

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