RU2016117441A - The method of determining the margin of static stability of the load node of the electric network with induction motors - Google Patents

The method of determining the margin of static stability of the load node of the electric network with induction motors Download PDF

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Publication number
RU2016117441A
RU2016117441A RU2016117441A RU2016117441A RU2016117441A RU 2016117441 A RU2016117441 A RU 2016117441A RU 2016117441 A RU2016117441 A RU 2016117441A RU 2016117441 A RU2016117441 A RU 2016117441A RU 2016117441 A RU2016117441 A RU 2016117441A
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Russia
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load
voltage
power
supply unit
motors
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RU2016117441A
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Russian (ru)
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RU2638573C2 (en
Inventor
Александр Георгиевич Фишов
Валерия Олеговна Чершова
Алексей Леонидович Нагайцев
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Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Новосибирский государственный технический университет"
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Priority to RU2016117441A priority Critical patent/RU2638573C2/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation

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  • Control Of Multiple Motors (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor And Converter Starters (AREA)
  • Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)

Claims (1)

Способ определения запаса статической устойчивости узла нагрузки электрической сети с асинхронными электродвигателями путем измерения режимных параметров, расчета коэффициентов запаса по напряжению и мощности по схемам замещения узла нагрузки и питающей сети, отличающийся тем, что параметры схем замещения асинхронных двигателей, узлов комплексной нагрузки, питающей сети определяют в текущем времени по уравнениям взаимосвязи параметров схем замещения и периодически измеряемых режимных параметров для совокупности режимов работы узла нагрузки, питающего узла, формируемых как из режимов работы узла нагрузки при их естественном изменении, так и при искусственно создаваемых изменениях путем значимой разгрузки электродвигателей, изменения напряжения в питающем узле, по схеме замещения рассчитывают критическое скольжение электродвигателя или эквивалентного электродвигателя для группы электродвигателей, предельные напряжения и мощности двигателя, узла нагрузки или напряжения питающего узла, передаваемой мощности со стороны питающего узла, коэффициенты запаса по напряжению и мощности и, при недопустимом снижении заданных запасов по напряжению или активной мощности, снижают загрузку асинхронных двигателей или воздействуют на средства повышения напряжения и отключают часть нагрузки для предотвращения нарушения устойчивости режима асинхронных двигателей.A method for determining the margin of static stability of a load node of an electric network with asynchronous electric motors by measuring operational parameters, calculating safety factors for voltage and power according to the equivalent circuit of the load node and the mains, characterized in that the equivalent circuit parameters of asynchronous motors, complex load nodes, the mains are determined in the current time according to the equations of the relationship between the parameters of equivalent circuits and periodically measured operating parameters for a set of operating modes for the load of the supply unit, formed both from the operation modes of the load unit during their natural change, and when artificially created by significant unloading of electric motors, voltage changes in the supply unit, the critical slip of an electric motor or equivalent electric motor for a group of electric motors is calculated by the equivalent circuit, voltage and power of the engine, load unit or voltage of the supply unit, the transmitted power from the supply unit, safety factors for n voltage and power, and with an unacceptable decrease in the specified reserves of voltage or active power, reduce the load of asynchronous motors or affect the means of increasing voltage and disconnect part of the load to prevent disturbance of the regime of asynchronous motors.
RU2016117441A 2016-05-04 2016-05-04 Method of determining static stability margin of electric network load node with induction motors RU2638573C2 (en)

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CN110994647A (en) * 2019-12-13 2020-04-10 国网北京市电力公司 Power grid control method and device

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SU1196910A1 (en) * 1984-06-26 1985-12-07 Томский Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Политехнический Институт Им.С.М.Кирова Device for calculating coefficient of static stability margin of load node of electric power network
RU2251625C1 (en) * 2003-10-07 2005-05-10 Открытое акционерное общество "Энергомашкорпорация" Method of and device for starting gas-turbine set
DE102009042865A1 (en) * 2009-04-16 2011-05-19 Kühn, Walter, Prof. Dr. Ing. Method and device for automatic stabilization of a network for electrical power supply with at least one power converter

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