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Анализ устойчивости двигателей собственных нужд тепловых электростанций с учетом характеристик приводных механизмов

Анализ устойчивости двигателей собственных нужд тепловых электростанций с учетом характеристик приводных механизмов

Abstract

В работе проводится анализ устойчивости приводных асинхронных двигателей механизмов собственных нужд тепловой электростанции. При расчете учитываются рабочие (напорные) характеристики насосов и тягодутьевых машин, а также характеристики трубопроводных сетей, необходимые для определения моментно-скоростных характеристик механизмов. Полученная методика расчета была интегрирована в программное обеспечение «КАТРАН», где расчет переходных процессов проводится на основе метода последовательных интервалов с учетом уточненной аналитической зависимости момента от скорости рабочего механизма. Моделирование аварийных режимов позволяет определить успешность самозапуска генераторов и двигателей собственных нужд электростанции. На основе смоделированных аварийных режимов выявлены сенсорные элементы в схеме объекта исследования на основе оценки устойчивости генераторов и двигателей собственных нужд. Разработанная методика может быть использована для более точного выбора параметров срабатывания релейной и технологической защит в системах собственных нужд тепловых электростанций для более надежной работы основного и вспомогательного технологического оборудования.The paper analyzes the stability of driving mechanisms of auxiliary induction motors of thermal power plant. The calculation takes into account operating (pressure) characteristics of pumps and draft equipment, as well as the characteristics of the pipeline networks needed to determine the mechanisms of torque-speed characteristics. The resulting method of calculation was integrated into the software "KATRAN", where the calculation of transients is based on the method of successive intervals taking into account the adjusted analysis depending on the time of the machine operating speed. Modeling emergency operation makes it possible to determine the success of the self-start of auxiliary generators and motors to meet the needs of the plant. On the basis of the simulated emergency operation we found sensory elements in the scheme assessing the stability of auxiliary generators and motors. The developed method can be used to select the parameters of operation of relay protection and technological systems of auxiliary needs of thermal power for more reliable operation of the main and auxiliary process equipment.

Keywords

СОБСТВЕННЫЕ НУЖДЫ,ПИТАТЕЛЬНЫЕ НАСОСЫ,РАБОЧИЕ ХАРАКТЕРИСТИКИ,ХАРАКТЕРИСТИКА ТРУБОПРОВОДНОЙ СЕТИ,МОМЕНТНО-СКОРОСТНЫЕ ХАРАКТЕРИСТИКИ,ДИНАМИЧЕСКАЯ УСТОЙЧИВОСТЬ,САМОЗАПУСК ДВИГАТЕЛЕЙ,СЕНСОРНОСТЬ,STATION AUXILIARIES,FEED PUMPS,OPERATING CHARACTERISTICS,CHARACTERISTICS OF THE PIPE NETWORK,TORQUE-SPEED CHARACTERISTICS,DYNAMIC STABILITY,SELF-STARTING MOTOR,SENSORY

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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
Average