The topic of the presentation is about a work package of our on-going Finnish national research program SGEM (Smart Grids and Energy Markets), where smart grid concept – a low-voltage direct current (LVDC) distribution network is researched. The research is mainly carried out in Lappeenranta University of Technology (LUT). In the LVDC concept, smart grid functionalities, such as smart metering,...

It is well known that the Low-Voltage DC (LVDC) distribution system is a promising topology as a future smart distribution system due to its high efficiency and reliability. However, there are still some challenges in the construction and implementation of an LVDC system. For practical application of the LVDC system, therefore, it is necessary to perform any simulation in advance by considering...

Low Voltage Direct Current (LVDC) distribution is considered as one of the new promising technologies for better integration of distributed generation, and supplying local loads in more efficient way compare to AC systems. However, DC protection is still considered as one of the outstanding challenges that holds back the wide deployment of LVDC in last mile utility applications. Most of existin...

This article focuses on the overall system engineering aspects of low voltage DC (LVDC) electricity distribution.. The interdependencies between different parts of an LVDC distribution system are discussed emphasising the issues related with the interconnection of user-end LVDC installations and public LVDC systems. The main objective is to illustrate the importance of the total system engineer...

The modern low-voltage direct current (LVDC) distribution system merges ICT, power electronics and conventional grid technologies into single system. This paper gives an overview to the LVDC RULES research project and presents its first key results. The foundations of the project are laid by the lessons learned during earlier research projects. Impacts of providing ancillary services for the ne...

Traditional distribution power systems are facing numbers of changes. The major aspects that may influence the shape of the changes include: the connection of small scale renewable and advanced distributed energy resources, the deployment of demand side controls, and the supply of more heat and transport demands. But, because distribution systems have been designed and operated with very limite...

Information and communication technologies (ICT) play significant role in modern smart grids (SG). SG functionalities require implementation of devices with computing performance into the grids and communication network between these devices. This has also been the case in a low-voltage direct current (LVDC) electricity distribution system, to which remote and automated grid monitoring and cont...

Recently, LVDC (Low Voltage Direct Current) distribution system have been evolving into one of the most interesting topics in the field of distribution system due to its advantages in terms of power quality, reliability and power conversation loss reduction. Voltage control in LVDC distribution system is becoming important to improve the power quality and system reliable, it can keep voltage pr...

In this paper some photovoltaic, PV, conversion chains architectures for on-grid applications have been proposed and the advantage of the direct use of a Low Voltage Direct Current (LVDC) bus for the DC loads has been shown. The evaluation of the efficiency of the proposed chains compared to the classical one was performed. It is shown that LVDC use instead of standard AC plugs, in numerous app...