Intelligent multiport DC/AC inverter for distributed energy storage integration in low‑voltage electrical networks

Michail Dakanalis; Iason Kalaitzakis; Ioannis Roditis; Eftichios Koutroulis; Fotios Kanellos

Intelligent multiport DC/AC inverter for distributed energy storage integration in low‑voltage electrical networks

Vol. 26, No. 1, pp. 166-180, Jan. 2026

10.1007/s43236-025-01180-5

Multiport converter

Energy storage

Renewable energy sources

Electrical grid

Abstract

Distributed energy storage systems can help solve the local operating problems of electric energy systems, such as voltage support at the point of common coupling and balancing of the energy production fluctuation of renewable energy sources. At present, the interconnection of renewable energy sources and energy storage with the electric grid is implemented by using either a multiport power converter for the combination of photovoltaic (PV) power production with battery storage only or utilizing multiple individual power converters. This study presents an intelligent multiport DC/AC inverter that serves as an integrated interface of multiple small-scale and distributed energy storage units (electric vehicles, batteries, and supercapacitors), as well as small-scale PV arrays, with a low-voltage electric network. Its operation is controlled by an intelligent energy management system embedded in its control unit for the optimal charging/discharging of the interconnected energy storage units to reduce the energy cost of local loads and improve the quality of the power provided to the hosting system. Experimental results validate the effective performance of the proposed multiport DC/AC inverter, which achieves an efficiency of 94.6–97.2% and delivers a net economic benefit of up to 18.63%.

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Cite this article

[IEEE Style]

M. Dakanalis, I. Kalaitzakis, I. Roditis, E. Koutroulis, F. Kanellos, "Intelligent multiport DC/AC inverter for distributed energy storage integration in low‑voltage electrical networks," Journal of Power Electronics, vol. 26, no. 1, pp. 166-180, 2026. DOI: 10.1007/s43236-025-01180-5.

[ACM Style]

Michail Dakanalis, Iason Kalaitzakis, Ioannis Roditis, Eftichios Koutroulis, and Fotios Kanellos. 2026. Intelligent multiport DC/AC inverter for distributed energy storage integration in low‑voltage electrical networks. Journal of Power Electronics, 26, 1, (2026), 166-180. DOI: 10.1007/s43236-025-01180-5.