FEATURES OF MONITORING PARTIAL DISCHARGE IN THE STATOR WINDING INSULATION OF TURBINE GENERATORS, INCLUDED IN THE NETWORK

Abstract

In this paper reports the results of studies of the surveillance of partial discharge (PD) in the stator the turbine generator (TG) TVF-60-2 when its work on the network. Shown that, for a correct interpretation of the measurement results PD in TG, it is necessary to know winding diagram and the order of their location in the stator slots; circuit crossing them in the end-winding and the stress distribution at the bars in the slot and end-winding part of the TG. Consequently, series-connected stator bars potentially different relative to the ground, the conditions of occurrence of PD in each bar in the slot and end-winding part are substantially different and the phase of occurrence of PD becomes ambiguous parameter.

Keywords

• partial discharge
• turbine generator
• voltage distribution
• bar
• phase of occurrence and control of insulation condition