Maximum Allowable Output Power and Optimum Capacity of PV Generator in Power Distribution System under Constant Output Power Control of Power Conditioning System

Abstract

In recent years, it has been discovered that the magnitude of the connection node voltage is affected by the output power from a photovoltaic (PV) generator and the line impedance when the PV generator, in an increasing trend, is introduced into the distribution system. In this paper, power flow is qualitatively discussed using basic circuit theory comprising the voltage and current vector diagram. A magnitude and its operation point of the maximum allowable output power from the PV generator were successfully derived in the vector diagram where the power conditioning system was operated with a constant output power and constant power factor controls. Furthermore, an optimum capacity of the PV generator was also clarified in the vector diagram to effectively utilize the output power of the PV generator. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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“…The PV output depends on the PV panels' orientation, Figure 1 represents the output of panels facing south at a nominal tilt. Figure 2 represents the output power of a PV system for different orientations, Figure 2(a) represents the shape of the output of PV panels facing east at a nominal tilt, while Figure 2(b) represents the shape of a PV panel's output facing west at a nominal tilt [21]. When combining PV panel output with a tilt orientation between east, south, and west with nominal tilts, the system will have high peak load during morning, midday and afternoon [22].…”