Power quality monitoring in the romanian hight voltage grid

Transelectrica is the Romanian Transmission and System Operator (TSO). In the company´s activities, the Power Quality aspects are very actual and important. First part of the paper contains the standards and technical requirements regarding the Power Quality aspects included in Romanian technical code of the Electricity Transmission Grid. The reference concerns only the high voltage grid. The second part of this paper presents the strategy of controlling and monitoring of Power Quality in the transmission system, managed by TSO. Here are insert the main types of measurements, monitoring systems and results The locations, methods, measurements and results, obtained during past years are presented.. There are also results obtained in a substation with multilevel voltage (400/110 kV) by simultaneous measurements. The third part of this paper presents conclusions on the actual situation of Power Quality in Romanian high voltage grid. The final part of this paper enlightens the major problems concerning the control of power quality in the high voltage grids. It seams to be necessary to establish minimal requirements, methods of analysis and global performance parameters for Power Quality in interconnected high voltage systems (e.g. UCTE). Similar statistics focused on same parameters, admission limits, rules of analysis and monitor concerning Power Quality could be useful in complex analyses of high voltage system transmission behavior.