SU410513A1 - - Google Patents

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Publication number
SU410513A1
SU410513A1 SU1726556A SU1726556A SU410513A1 SU 410513 A1 SU410513 A1 SU 410513A1 SU 1726556 A SU1726556 A SU 1726556A SU 1726556 A SU1726556 A SU 1726556A SU 410513 A1 SU410513 A1 SU 410513A1
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SU
USSR - Soviet Union
Prior art keywords
voltage
winding
higher harmonics
current
difference
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SU1726556A
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Russian (ru)
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Priority to SU1726556A priority Critical patent/SU410513A1/ru
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Publication of SU410513A1 publication Critical patent/SU410513A1/ru

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Description

1one

Изобретение относитс  к способам защиты синхронных генераторов.This invention relates to methods for protecting synchronous generators.

Известные способы заш.иты обмотки ротора синхронного генератора от витковых замыканий , основанные на измерении тока и напр жени  высших гармоник, не обладают достаточной чувствительности.The known methods of securing the rotor windings of a synchronous generator from winding short circuits, based on the measurement of current and voltage of higher harmonics, do not have sufficient sensitivity.

По предлагаемому способу с целью повышени  чувствительности сравнивают среднее значение напр жени , пропорциональное выделенному току высших гармоник, протекаюш ,ему через обмотку, со средним значением напр жени  на обмотке от высших гармоник и по увеличению разности этих напр жений суд т о наличии витковых замыканий.In order to increase sensitivity, the proposed method compares the average voltage value, proportional to the extracted current of higher harmonics, flowing through the winding with the average voltage on the winding from higher harmonics and judging the presence of coil clocks to increase the difference of these voltages.

Поставленна  цель достигаетс  путем определени  величины индуктивности обмотки ротора на частоте высших гармоник напр жени  возбуждени , что позвол ет использовать этот способ в процессе эксплуатации генераторов и обеспечивает повышение чувствительности и независимость от вли ни  сопротивлени  контактных колец и изменени  температуры и исключает необходимость внешнего источника питани .The goal is achieved by determining the magnitude of the inductance of the rotor winding at the frequency of the higher harmonics of the excitation voltage, which allows this method to be used during the operation of generators and provides increased sensitivity and independence from the influence of the resistance of contact rings and temperature and eliminates the need for an external power source.

. На чертеже приведена блок-схема, по сн юща  предлагаемый способ, где 1 - обмотка ротора, 2 - датчик напр жени , 3 - датчик напр жени , пропорционального току высших гармоник, протекающему по обмотке, 4, 5 -. The drawing shows a block diagram illustrating the proposed method, where 1 is the rotor winding, 2 is a voltage sensor, 3 is a voltage sensor proportional to the current of higher harmonics flowing through the winding, 4, 5

выпр мительные мосты, 6 - исполнительный орган.rectification bridges, 6 - executive body.

Сравнивают две величины на выходе датчиков 2 и 3. Напр жение на выходе датчика 2 - среднее значение на обмотке ротора от высших гармоник напр жени  возбуждени . Напр жение на выходе датчика 3 - среднее значение напр жени , пропорциональное току высших гармоник, протекающего через обмотку . При отсутствии витковых замыканий в обмотке ротора эти напр жени  равны и разность их равна 0. При возникновении витковых замыканий разность этих напр жений не равна О, и по увеличению этой разности суд т о таких замыкани х.Two values are compared at the output of sensors 2 and 3. The voltage at the output of sensor 2 is the average value at the rotor winding of the higher harmonics of the excitation voltage. The voltage at the output of sensor 3 is the average value of the voltage proportional to the current of higher harmonics flowing through the winding. In the absence of coil closures in the rotor winding, these voltages are equal and their difference is 0. When coil closures occur, the difference of these voltages is not O, and to increase this difference, such closures x.

Предмет изобретени Subject invention

Снособ защиты обмотки ротора синхронного генератора от витковых замыканий в рабочем режиме, основанный на измерении тока и напр жени  высших гармоник, отличающийс  тем, что, с целью повышени  чувствительности , сравнивают среднее значение папр жени , пропорциональное выделенному току высших гармоник, протекающему через обмотку , со средним значением напр жени  на обмотке от высших гармоник и по увеличению разности этих напр жений суд т о наличии витковых замыканий.The method of protecting the rotor winding of a synchronous generator from windings in an operating mode, based on the measurement of current and voltage of higher harmonics, characterized in that, in order to increase the sensitivity, the average value of the coupling proportional to the selected current of the higher harmonics flowing through the winding is compared with the average value of the voltage on the winding from higher harmonics and to increase the difference of these voltages judged the presence of coil closures.

&&

SU1726556A 1971-12-20 1971-12-20 SU410513A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1726556A SU410513A1 (en) 1971-12-20 1971-12-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1726556A SU410513A1 (en) 1971-12-20 1971-12-20

Publications (1)

Publication Number Publication Date
SU410513A1 true SU410513A1 (en) 1974-01-05

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ID=20496699

Family Applications (1)

Application Number Title Priority Date Filing Date
SU1726556A SU410513A1 (en) 1971-12-20 1971-12-20

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SU (1) SU410513A1 (en)

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