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Paper on "Deployment and Operation of an Isolated Smart Grid"

Paper on "Deployment and Operation of an Isolated Smart Grid"

A paper* to be presented at the 35th International Telecommunications Energy Conference   Summary / Abstract This paper presents the design, deployment and operation of an isolated smart grid in Xanthi, Greece. The overall topology and the architecture of the grid is analyzed, including the power production, transmission, consumption and the communication infrastructure. The grid consists of three smaller microgrids that are connected together through a common DC bus. Each microgrid consists of equipment exploiting various renewable energy sources, a local load, a battery and a diesel generator. In the third microgrid, hydrogen is also utilised by a long term energy storage facility. A case study shows that when the three microgrids are connected allowing energy exchange among them, the overall efficiency is greatly increased as the usage of the diesel generators is reduced and the available energy is fully exploited.   1. Introduction Traditional power grids consist of four distinctive components: generation-transmission-distribution-consumption. The energy flow is unidirectional from the few central power generation stations to the consumer. This topology suffers from three main problems; the efficiency significantly drops due to losses during the transmission stage, the grid is not designed for equipment facilitating distributed generation such as Fuel Cells (FCs) and Photovoltaic panels (PVs), while the effects of locally observed malfunctions or other similar problems are easily propagated throughout the entire grid [1]. For this reason, an information grid is placed on top of the power grid and with the use of modern power electronics; energy and information can easily be transmitted in multiple directions within the grid [2]. Thus, it is possible to use distributed sources for... read more