science-review.ru
Scientific journal
Scientific Review. Technical science
ISSN 2500-0799
ПИ №ФС77-57440
ISSN 2500-0799
ПИ №ФС77-57440
EQUIPMENT SELECTION, ELECTRIC BRAKING SCHEME AND MATHEMATICAL DESCRIPTION OF TRANSIENT PROCESS OF POWERFUL SYNCHRONOUS PUMPING UNIT UNDER EMERGENCY CUT OFF FROM POWER GRID
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A schematic diagram of the electric braking synchronous pumping unit is presented in order to reduce the sudden decline in revolution during emergency disconnection of the engine from the grid. The methods for calculating the parameters of the energy-intensive resistor and selection of the optimal value of its resistance of electrical braking during overspeed mode of the unit’s operation, its work in recuperating mode, as well as a simplified mathematical model of hydro-mechanical transients in the flow path of the pump unit at its overspeed in the synchronous motor’s power shutdown are included. The proposed electric braking scheme and the submitted calculation methods make it possible to perform a study of transient processes of synchronous pumping units and to assess the value of overspeed within a wide range of parameters inside the stator-motor circuit, including the parameters of the energy-intensive resistor, its drive system and a particular hydraulic tract pump unit. For designing and servicing companies operating high-power systems.