Hydrogenerators refurbishment within Romanian power system

The power quality is one of the main interests within the power generation, delivery and transmission domains. In order to have a higher quality for the power produced in synchronous generators (mainly located in hydro power plants), using an adequate excitation system is essential. This paper shows a general overview of the main tasks which Romanian power producers have to accomplish today. It also presents, several case studies concerning the existing technical solutions (used for the excitation system of synchronous generators) applied in Romania until now. The main goal of this paper is to present the actual situation in this area, to identify some solutions and tendencies concerning the updating of the existing Romanian generators, in order to accomplish all European power standards and regulations. This study has been performed by the authors by taking in consideration opinions coming from the industrial environment.