Abstract
The paper aims at providing the analysis of domestic energy generation and consumption within residential areas. The topic of this study is twofold: theoretical and experimental by addressing aspects related to the operation of a microgrid connected to the low-voltage distribution grid. In order to achieve the power quality analysis for various scenarios, an appropriate testing stand was developed by using the Chauvin Arnoux CA 8435 analyser. There is envisaged the modelling and design of a mixed microgrid characterized by two line sections established by three main energy consumption nodes. There have been integrated several connection points related to the distributed generation sources and to the photovoltaic power plants, respectively, and also several supply points for the household end-users. 13 operation scenarios have been developed and recorded by analysing the voltage variation within the microgrid. Furthermore, the paper envisages the stabilization impact of the microgrid voltage variation in the presence of distributed generation sources.
Highlights
Even though the energy demand is usually met by centralized power generation, the current trends show that residential users are getting more and more interested in the use of renewable energy sources, distributed power generation, energy storage technologies and advanced automated systems for measurement and control [1]
The nodes correspond to the connection points of the distributed generation sources and to the power supply points of the household end-users
When analysing the cases 2-13, the electrical consumers connected in various configurations were supplied both by the low-voltage grid and by the photovoltaic power plants connected to the power system
Summary
Even though the energy demand is usually met by centralized power generation, the current trends show that residential users are getting more and more interested in the use of renewable energy sources, distributed power generation, energy storage technologies and advanced automated systems for measurement and control [1]. The advantages of residential microgrids regard aspects like environmental protection, diversification of energy generation sources, technological development and innovation, low cost of primary energy (especially solar energy) and the fact that they are not exhaustible. Another relevant aspect to the use of renewable energy sources takes into account the necessary restraints in order to ensure the safety of the electric power system [2]. In order to achieve the objective of the paper, the power quality indicators within a small-scale photovoltaic power plant were recorded and analysed when supplying low power consumers with linear or non-linear behaviour
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