Effect of Reactive Power Consumption Mode on Technical Condition of T3FP-110-2MU3 Turbogenerator

Abstract

The necessity of turbogenerators operation in the reactive power consumption mode is determined by the shortage of compensating devices in the network. Recently, accidents associated with generators long-term operation at low levels of excitation have become more frequent, which is a prerequisite for the consumption of reactive power by the generator. The purpose of this research is to assess the effect of the reactive power consumption mode on the technical condition of the T3FP-110-2MU3 turbogenerator. The source of information about the technical condition of the turbogenerator is the data obtained from the operating and repair documentation, electrical and thermal tests protocols, technical reports with the results of comprehensive diagnostic examinations of the turbogenerator. The cores of T3F series generators have been examined. No gaps between the pressure fingers and the surface of the edge packages have ever been detected during examinations, which indicates the absence of significant curvature of the extreme core packages. During the study of temperature by T3FP-110-2MU3 thermal resistance converters, it is found out that with an increase of reactive power consumption, the temperature of the windings and the active steel of the stator core of the turbo generator decreases and it does not exceed the upper warning settings in the mode of reactive power output, the opposite dependence is visible. It is established that the influence of the reactive power consumption mode on the technical condition of the T3FP-110-2MU3 when operating in steady-state modes within the factory PQ-diagram is minimal. In the stator core of the turbogenerator under consideration, high resistance of the teeth of the extreme packages to operational loads has been achieved, due to significant improvements in the design and manufacturing technology of the end zones. From the point of view of practical significance, T3F series turbogenerators are allowed to be used for reactive power consumption. As a further direction of research, it is planned to consider the operation of turbogenerator in maneuverable modes with the transition from the issuance of reactive power to its consumption and vice versa.