Режимна надійність в електроприводах насосних агрегатів

Abstract

According to the research results, the target functions of the problem of optimization of steady-state operation of electric pumping units of the water pumping station according to the criteria of mode reliability depending on the flow of working fluid were synthesized, which made it possible to investigate the influence of mode The extreme values of the local target functions of the mode reliability of the electric motor and the centrifugal pump in different (including lowconsumption) operating modes are determined. It is proposed to optimize the established modes of operation of the pump unit with the simultaneous use of criteria for the reliability of the electric drive and pump. It is established that the maximum values of the reliability of the electric motor and the centrifugal pump are reached at different values of the load, which requires the involvement of the methodology of multicriteria optimization. The problem of optimization of the established modes of the electric drive pump unit of the water pumping station in multicriteria statement taking into account technological limitations of work of its subsystems is formalized. An analysis of modern methods for solving the problem of multicriteria optimization of steady-state modes of operation of pumping units. The method of solving the problem of multicriteria optimization is substantiated, which fully takes into account the influence of the mode on the reliability of the subsystems of the pump unit. It was found that the most expedient method of solving this problem is the method of approaching the ideal (utopian) point in the space of criteria. The ratio of criteria at the point of optimum established by means of this method is the best. The value of the "agreed optimum" of the liquid flow is determined in order to select the optimal mode of operation of the electric pumping unit of the water pumping station.