Dynamic Modes of Synchronous Electric Drive with Centrifugal Hydraulic Load of Pump Station

Abstract

The contemporary state of the modelling of the pump station’s electric drive in a complex with its centrifugal hydraulic load has been analysed. It was found that most studies focus either on the modelling and development of automatic control systems for the asynchronous electric drive of pumps or on the optimization of performance indicators of the station as a whole. Besides, usually only one of the subsystems of a pumping station (or an electrically-operated pump unit) is modelled with a good degree of detail: either electromagnetic or hydraulic. This approach does not allow a concurrent research of electromagnetic and hydraulic processes in them. The paper proposes a comprehensive mathematical model of the dynamic modes of the synchronous electrically-operated centrifugal pump unit with a pipeline, in which the electromagnetic and hydraulic subsystems are presented with a balanced degree of detail. The developed model was verified and its viable applications were suggested.

Modelling the modes of system of asynchronous centrifugal units of multi-unit pumping station with serial connection of pumps

“…The model of a saturated asynchronous motor (AM) and the CP model, the feature of which is the identification of its parameters by the geometric dimensions of the CP structural elements and physical properties of the working fluid, created in the d-q coordinates connected with the common shaft, proposed in [21], are taken as the basis. Fig.…”

“…Thus, the generalized model of the system of ACU of a multi-unit PS with CP hydraulic paths connected in series consists of 11•N + 2 equations (including 8 equations in the complex form). The above expressions include relative values of coordinates and parameters; the exception is the total moment of inertia of ACU J Σ , kg•m 2 , as well as the basic values [21], marked with the index b.…”

“…The simulation models (for example, [12], [19]) provide more details on a number of coordinates of the mode, but do not reflect the essence of the physical processes. In the works [20], [21], each of the subsystems of a single electrically driven asynchronous pumping unit in dynamic modes is described in sufficient detail, but the issue of modelling their joint operation, which is typical for multi-unit PSs, is not resolved.…”