Wybrane zagadnienia współczesnej oceny jakości energii elektrycznej

This paper describes the development of power quality. Discussed issues stay in relation to aspects of present power systems, taking into consideration technical aspects, energy market and energy security. It was suggested the need to develop of power quality monitoring systems and continue benchmarking reports. Additionally a new challenges was highlighted including extension of the frequency range of power quality disturbances, use of new signal analysis tools for the analysis of long-term and multi-point data, locating sources of disturbance. Next aspect pointed out the need to integrate power quality monitoring in the process of the interoperability of power systems. Additionally, selected issue of new power quality indices is presented.