RU2018118911A - Method for protecting power transformer of AC traction substations from internal damage - Google Patents

Method for protecting power transformer of AC traction substations from internal damage Download PDF

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Publication number
RU2018118911A
RU2018118911A RU2018118911A RU2018118911A RU2018118911A RU 2018118911 A RU2018118911 A RU 2018118911A RU 2018118911 A RU2018118911 A RU 2018118911A RU 2018118911 A RU2018118911 A RU 2018118911A RU 2018118911 A RU2018118911 A RU 2018118911A
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RU
Russia
Prior art keywords
power
voltage
power transformer
transformer
unbalance
Prior art date
Application number
RU2018118911A
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Russian (ru)
Other versions
RU2710023C2 (en
RU2018118911A3 (en
Inventor
Николай Потапович Григорьев
Борис Евгеньевич Дынькин
Арсений Петрович Парфианович
Полина Николаевна Трофимович
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АНО "Университет"
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Priority to RU2018118911A priority Critical patent/RU2710023C2/en
Publication of RU2018118911A publication Critical patent/RU2018118911A/en
Publication of RU2018118911A3 publication Critical patent/RU2018118911A3/ru
Application granted granted Critical
Publication of RU2710023C2 publication Critical patent/RU2710023C2/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/04Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
    • H02H7/045Differential protection of transformers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Protection Of Transformers (AREA)

Claims (1)

Способ защиты силового трансформатора тяговой подстанции переменного тока от внутренних повреждений для снижения ущерба последствий работы неисправного силового трансформатора заключается в измерении токов со стороны высшего, тягового и районного напряжения силового трансформатора измерительными трансформаторами тока, определении небаланса токов обмоток силового трансформатора, для этого вторичные обмотки измерительных трансформаторов тока, установленные со стороны высшего и тягового напряжения, соединены таким образом, что измеряется небаланс токов вторичных обмоток, которые приведены к одному напряжению, и небаланс тока меньше тока уставки срабатывания защиты является признаком отсутствия внутреннего повреждения силового трансформатора, превышение небаланса тока принятой уставки является признаком внутреннего повреждения силового трансформатора, при этом дифференциальная защита срабатывает, и напряжение с поврежденного трансформатора отключается, отличающийся тем, что дополнительно измерительными трансформаторами напряжения измеряется напряжение обмоток высшего, тягового и районного напряжения силового трансформатора, и определяется баланс мощности потребления силовым трансформатором от линии электропередачи обмотками высшего напряжения и мощность для питания нагрузок потребителей, которые подключены к обмоткам среднего и низшего напряжения, а также потери мощности в силовом трансформаторе в стали, - определяемые по показаниям измерительных трансформаторов напряжения и потерь холостого хода, а также в меди - по показаниям измерительных трансформаторов тока и сопротивлений обмоток, небаланс мощности менее уставки небаланса мощности является признаком отсутствия внутреннего повреждения трансформатора, превышение небаланса мощности уставки небаланса мощности является признаком внутреннего повреждения силового трансформатора, дифференциальная защита срабатывает, и напряжение с поврежденного силового трансформатора отключается, что повышает точность определения внутренних повреждений и снижает ущерб от внутреннего повреждения силового трансформатора.The way to protect the power transformer of an AC traction substation from internal damage to reduce the damage caused by a faulty power transformer is to measure currents from the higher, traction and district voltage of the power transformer by current measuring transformers, to determine the unbalance of the currents of the windings of the power transformer, for this the secondary windings of measuring transformers current installed on the side of higher and traction voltage are connected in such a way that from The unbalance of the currents of the secondary windings, which are reduced to the same voltage, is checked, and the unbalance of the current less than the current of the setpoint for the protection trip is a sign of the absence of internal damage to the power transformer, exceeding the unbalance of the current of the adopted setpoint is a sign of internal damage of the power transformer, while the differential protection is triggered, and the voltage from the damaged transformer is switched off, characterized in that in addition voltage is measured by voltage transformers windings of the higher, traction and regional voltage of the power transformer, and the balance of the power consumption by the power transformer from the power line is determined by the high voltage windings and the power to power consumer loads that are connected to the medium and low voltage windings, as well as the power loss in the power transformer in steel, - determined by the readings of measuring transformers of voltage and idle losses, as well as in copper - by the readings of measuring current transformers and resistances winding, power imbalance less than the power unbalance setting is a sign of the absence of internal transformer damage, excess power unbalance the power unbalance setting is a sign of internal damage to the power transformer, differential protection is activated, and the voltage from the damaged power transformer is turned off, which increases the accuracy of determining internal damage and reduces damage from internal damage to the power transformer.
RU2018118911A 2018-05-22 2018-05-22 Method for protection of power transformer of ac traction substations from internal damages RU2710023C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2018118911A RU2710023C2 (en) 2018-05-22 2018-05-22 Method for protection of power transformer of ac traction substations from internal damages

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2018118911A RU2710023C2 (en) 2018-05-22 2018-05-22 Method for protection of power transformer of ac traction substations from internal damages

Publications (3)

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RU2018118911A true RU2018118911A (en) 2019-11-22
RU2018118911A3 RU2018118911A3 (en) 2019-11-22
RU2710023C2 RU2710023C2 (en) 2019-12-24

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RU2018118911A RU2710023C2 (en) 2018-05-22 2018-05-22 Method for protection of power transformer of ac traction substations from internal damages

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2744937C1 (en) * 2020-06-15 2021-03-17 Федеральное государственное бюджетное образовательное учреждение высшего образования "Дальневосточный государственный университет путей сообщения" (ДВГУПС) Internal damage protection device for power transformers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU691787A1 (en) * 1976-06-14 1979-10-15 Украинское Отделение Всесоюзного Государственного Проектно-Изыскательского И Научно-Исследовательского Института Сельэнергопроект Apparatus for measuring wear of power transformers
US5671112A (en) * 1996-05-13 1997-09-23 Abb Power T&D Company, Inc. Digital integrator V/Hz relay for generator and transformer over-excitation protection
RU162402U1 (en) * 2015-10-21 2016-06-10 Общество с ограниченной ответственностью "АвтоматикаДон" DEVICE OF ADAPTIVE RESERVE PROTECTION OF TRANSFORMERS ON BRANCHES OF THE AIRLINE

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RU2710023C2 (en) 2019-12-24
RU2018118911A3 (en) 2019-11-22

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Effective date: 20200523