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Выбор оборудования, схемы электрического торможения и математическое описание переходных процессов мощных синхронных насосных агрегатов при аварийном отключении их от сети

Выбор оборудования, схемы электрического торможения и математическое описание переходных процессов мощных синхронных насосных агрегатов при аварийном отключении их от сети

Abstract

Представлена принципиальная схема электрического торможения мощного синхронного насосного агрегата с целью снижения угонной частоты вращения при аварийном отключении двигателя от сети. Предложены методики расчёта параметров энергоёмкого резистора и выбора оптимальной величины его сопротивления для электрического торможения при угоне агрегата и работе в генераторном режиме, а также упрощённая математическая модель гидромеханических переходных процессов в проточном тракте насосного агрегата при его выбеге в случае потери питания синхронным двигателем. Предлагаемая схема электрического торможения и представленные согласно этой схеме методы расчётов позволяют выполнить исследования переходных процессов синхронных насосных агрегатов и оценить величины угонных частот вращения в широкой вариации параметров статорной цепи двигателя, в том числе и параметров энергоёмкого резистора, параметров его системы возбуждения и параметров гидравлического тракта конкретного насосного агрегата. Для проектных и эксплуатирующих организаций систем электроснабжения, имеющих мощные узлы силовых (двигательных) нагрузок.

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.

Keywords

НАСОСНЫЙ АГРЕГАТ (НА), PUMPING UNIT (PU), УГОННАЯ ЧАСТОТА, ЭЛЕКТРИЧЕСКОЕ ТОРМОЖЕНИЕ, ЭНЕРГОЁМКИЙ РЕЗИСТОР

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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