SU277071A1 - DEVICE FOR DIFFERENTIAL PROTECTION OF THE CONVERTER - Google Patents
DEVICE FOR DIFFERENTIAL PROTECTION OF THE CONVERTERInfo
- Publication number
- SU277071A1 SU277071A1 SU1356983A SU1356983A SU277071A1 SU 277071 A1 SU277071 A1 SU 277071A1 SU 1356983 A SU1356983 A SU 1356983A SU 1356983 A SU1356983 A SU 1356983A SU 277071 A1 SU277071 A1 SU 277071A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- converter
- differential protection
- core
- positive
- transformer
- Prior art date
Links
- 238000004804 winding Methods 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 3
- 230000001264 neutralization Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001360 synchronised Effects 0.000 description 1
Description
Известно устройство дл дифференциальной защиты преобразовател , питающегос от трансформатора с заземленной нейтралью, от короткого замыка-ни цепи нагрузки на землю, представл ющее собой сердечник из -магнитного -материала с -пр моугольной петлей гистерезиса , -содержащий выходную обм-отку « обхватывающий силовые шины преобразовател .A device is known for differential protection of a converter fed from a transformer with a grounded neutral, from a short circuit to a load circuit on the earth, which is a core of a magnetic material with a rectangular hysteresis loop, containing an output sweep that grabs power buses converter
В предлагаемом -устрой-ст1ве, с целью -повышени его н-адежн-ости, через отверстие сердечника пропущены положительна и отр-ицательна шины посто нного тока лре-образовател со стороны выхода.In the proposed —Struve, —for the purpose of increasing its n-adherence — a positive and positive direct-current DC bus from the output side is passed through the hole of the core.
На чертеже представлена принципиальна схема устройства.The drawing shows a schematic diagram of the device.
Через отверстие сердечн-ика /, выполненного из 1магнитного материала ,с .пр моуголыгой петлей гистерезиса, проход т положительна 2 и -отрицательна 3 шины посто нного тока преобразовател 4, по которым протекает ток обмотки ротора 5. На сердечнике распол-ол ена также выходна обмотка 6.Through the hole of the heart-shaped I, made of 1 magnetic material, with a positive hysteresis loop, 2 and -negative 3 DC buses of converter 4 pass through which the rotor winding 5 flows. On the core there is also an output winding 6.
-Преобразователь 4 включен на сетевой тран-сформатор 7 с заземленной -нейтралью 8 и питает ротор синхролной машины. Точка 9 указывает место возможного пробо на землю.- Converter 4 is connected to a network transformer 7 with a grounded neutral 8 and feeds the rotor of the synchrol machine. Point 9 indicates the location of a possible ground test.
ный поток равен нулю. Поэтому сердечник не насыщен.the flow is zero. Therefore, the core is not saturated.
При возникновении пробо изол ции ротора синхронной .машины по вл етс путь дл тока по цепи: заземление транс-форматора - точка пробо изол ции. Равновесие токов и их потоков нарушаетс , возникает суммарный поток. При возникновен-ии даже небольшого су-М1марного потока сердечник -на-сыщаетс , на .выходеWhen a breakdown of the rotor of a synchronous machine occurs, a path for current through the circuit appears: the transformer grounding is the breakdown point of the insulation. The balance of currents and their currents is disturbed, and a total flow arises. With the emergence of even a small sous-M1marn stream, the core is on-sous, on the exit
обм-отки 6 п-о вл етс импульсный сигнал, а и-ндуктивн-ое сопротивление переменному току обмотки 6 резко падает. Импульс напр жени или уменьшение сопротивлени обмотки используетс в -качестве сигнала дл защитыA p-o p-ohm is a pulsed signal, and the inductance of an alternating current of winding 6 drops sharply. A voltage pulse or a reduction in winding resistance is used as a signal to protect
преобразовател .converter
П р е д Л е т изобретени P re d Invention
Устройство дл дифференЦиальной защиты преобразовател , питающегос -от трансфор-матора с заземленной нейтралью, от .короткого замыкани цепи нагруз-ки на землю, представл ющее собой сердечник из магнитного материала с п.р моугольной петлей гистерезиса, содержащий выходную облютку и обхватывающ .ий силовые шины преобразовател , отличающеес тем, что, с целью повышени надел ности , через отверстие .сердечника пропущены положительна и -отрицательна шины посто нного то.ка преобразовател со сторо-ны A device for differential protection of a converter that feeds a transformer with a grounded neutral from the short circuit of the load circuit to earth, which is a core made of magnetic material with a rectangular hysteresis loop, containing the output cover and grasping power converter tires, characterized in that, in order to increase the investment, a positive and negative cable of a constant current is passed through the hole in the core.
I-W- :I-W-:
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU874308818A Addition SU1563616A2 (en) | 1987-09-23 | 1987-09-23 | Device for intrasoil local fertilizer application |
| SU884452807A Addition SU1561864A2 (en) | 1988-06-03 | 1988-06-03 | Device for local intrasoiling fertilizing |
| SU884479619A Addition SU1641210A2 (en) | 1988-09-07 | 1988-09-07 | Device for subsoil local application of fertilizers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU277071A1 true SU277071A1 (en) |
Family
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