This article examines the issue of the increase in electrical energy losses in the iron cores of
power transformers as a result of prolonged operation. A summary analysis of the results of …

This paper is part of a series of articles concerning the changes of losses in transformers as
result of extended exploitation. The paper discusses and analyses the obtained loss values …

This paper describes a new physical model for micro-, mini-and nanogrid research and
testing, which has been developed and realized at the Power System Stability Laboratory …

The Ac Time Overcurrent Relay (51) and the Instantaneous Overcurrent Relay (50)
protections are the most commonly used relay protections in Bulgaria against phase-to …

This paper presents an experimental test set-up for analysis and testing of micro and
nanogrids with converter interfaced generation with storage realized in the Power System …

The article describes the operational measures for reduction of power and energy losses in
electricity distribution networks. For the assessment of their effect and their correct …

This article presents a concept and architecture of interconnected laboratories for stability
studies of future power systems. Based on the knowledge and infrastructure base of the …

The renewable energy take part in the most of the electric power systems in the modern
world. The part of this type of energy in the global electric power system, as well as in the …