Dawwamai Ƙauna na Ƙarfin Yanayin Turbin Mai Yankin Dukkida

Takardukan da Kofin Daɗi na Turbin

1. Takardukan da Kofin Daɗi na Bujinga ta Tafiya

1.1 Inganci na Kofin Daɗi

Kumbura bujingar tafiya daga kasa da karkashin jirgin ruwa ko karkashin sauyin gaba. Yadda ingancin kofin daɗi daga cikin bujinga zuwa tap/flange ta ƙarfafa 2500V. Dalilai su ba zan iya ci gaba da dalilan da aka yi a makarantun da wurare da tsari masu harshe. Don bujinga mai ƙaramin kafin da shi da tasiri na 66kV ko uku da bujinga mai ƙarin kafin da shi da tasiri, yadda ingancin kofin daɗi daga cikin bujinga mai ƙarin kafin da shi zuwa flange ta ƙarfafa 2500V; dalilin ya kamata bai ƙara 1000MΩ ba.

1.2 Yadda Ake Yawarci Faktoringin Kafin Duk

Yawarci faktoringin (tanδ) da kafin duk na kofin daɗi zuwa tap ta ƙarfafa rana na wiring method. Yi amfani da sabon wiring configuration da ke cika a cikin karfin da aka bayyana da zaɓe kafin duk na 10kV.

Jirgin ruwa mai yawa don yawarci faktoringin kafin duk ya kamata a kumbura da kwallonsa mai kofin daɗi, zama tare da abubuwan da suka da su da kasa da al'adu. Yi amfani da tattalin arziki mai yawa don kuza da wani da ba ake magance ba a arewacin kafin duk mai yawa. Dalilai da aka samu a yawarce faktoringin da kafin duk ba zan iya ci gaba da dalilan da aka yi a makarantun da wurare da tsari masu harshe kuma ya kamata ci gaba da takardukan da ake bayyana.

2. Tarkarwar da Takardukan da Kofin Daɗi na Tap Changer na Tafiya

Na iya tarkarwar da ci gaban daɗin da ake yi a kan contacts na on-load tap changer. Yadda dalilin transition resistance value da kuma lokacin da ake yi changing. Dalilai da aka samu a lokacin da ake yi changing, ci gaban daɗin da aka yi a kan lokacin da ake yi changing, lokacin da ake yi changing, da kuma ci gaban daɗin da aka yi a kan lokacin da ake yi changing da kuma lokacin da ake yi changing ya kamata ci gaba da takardukan da ake bayyana a kan karfin da aka yi a makarantun da wurare da tsari masu harshe.

3. Yadda Ake Yawarci DC Resistance Measurement of Windings with Bushings

Yadda ake yawarci DC resistance na high-voltage winding a cikin har daɗin da ake yi tap position da kuma low-voltage side. Don transformers da suka da neutral points, yadda ake yawarci single-phase DC resistance idan an yi haka. Rasa hanyar jiki a lokacin da ake yi measurement don a yi ci gaban da dalilai da aka samu a makarantun da wurare da tsari masu harshe ba da ƙarin. Ci gaban daɗin da aka yi a kan line-to-line ko phase-to-phase values ya kamata ci gaba da takardukan da ake bayyana.

4. Yadda Ake Tabbatar Voltage Ratio Check for All Tap Positions

Saki don turns ratio tester leads zuwa high da kuma low voltage sides na three-phase transformer. Tabbatar voltage ratio a cikin har daɗin da ake yi tap positions. Ci gaban da data na nameplate na manufacturer, ba zan iya ci gaba da dalilai da aka samu a makarantun da wurare da tsari masu harshe, da kuma ratios ya kamata ci gaba da expected patterns. A cikin rated tap position, allowable error ya kamata ±0.5%. Don three-winding transformers, yi ratio tests for HV-MV, MV-LV separately.

5. Tabbatar Three-Phase Connection Group and Single-Phase Transformer Terminal Polarity

Abubuwan da aka tabbatar ya kamata ci gaba da design requirements, nameplate markings, and symbols na transformer housing.

6. Yadda Ake Yawarci Insulation Oil Sampling and Testing

Ba za a yi oil sampling ba hatta da transformer ya kama da oil completely filled da kuma an yanke da ita a lokacin da aka bayyana. Ba a yi oil sample, kumbura container da kyau kuma a bayyana shi zuwa relevant department don testing.

7. Yadda Ake Yawarci Insulation Resistance, Absorption Ratio or Polarization Index Measurement

Duk abubuwan da ake yi a kan insulation-related tests ya kamata a yi ba a yi ne ba a yi haka idan insulating oil ta kama da ƙarin don testing da kuma a lokacin da humidity levels su da ƙarin. Don transformers da suka da polarization index measurement, tabbatar short-circuit current na insulation resistance meter ba zan ƙara 2mA. Rasa hanyar jiki a lokacin da ake yi testing don a yi ci gaban da dalilai da aka samu a makarantun da wurare da tsari masu harshe. Dalilai da aka samu ba zan ƙara 70% da dalilai da aka samu a makarantun. Test items should include: HV-(MV+LV+ground), MV-(HV+LV+ground), LV-(MV+HV+ground), overall-ground, core-(clamp+ground), and clamp-(core+ground). Idan ake yi HV-(MV+LV+ground), short-circuit all three phases of the high-voltage side and the corresponding neutral point (if present), ground all other parts, connect the high-voltage terminal of the insulation resistance meter to the HV side, and the ground terminal to ground for testing.

8. Yadda Ake Yawarci Dissipation Factor (tanδ) for Windings with Bushings

Test using the reverse wiring method, following the instrument's specified wiring configuration. Test items include: HV-(MV+LV+ground), MV-(HV+LV+ground), LV-(MV+HV+ground), and overall-ground, performed sequentially. During testing, suspend the high-voltage test leads of the dissipation factor tester with insulating tape to prevent contact with the transformer tank. Record the ambient temperature during testing. When comparing with factory values at equivalent temperatures, the measured values should not exceed 1.3 times the factory values. If measurements deviate significantly from factory values, clean the bushings or use conductive shielding on the bushings to reduce surface leakage current. Testing should preferably be conducted during weather with relatively low humidity.

9. Yadda Ake Yawarci DC Leakage Current Measurement for Windings with Bushings

Yadda karamin karamin kudin da shi ya fi yawa ita ce a tsakiyar jirgin gaba. Abubuwan da za su fito sun haɗa da: HV-(MV+LV+ground), MV-(HV+LV+ground), LV-(MV+HV+ground). Zai iya yi abin da shi a lokacin da yawan duka ita, kuma zai iya tara hanyar wani rubutu. Duk da cewa bayanai na karamin kudin ba zai iya kasancewa mafi girman da aka bayyana a cikin kungiyoyin handover.

10. Binadamai Masauki

10.1 Binadama Karamin Kudin

Don transformashi da take 35kV ko kadan, ana nemi hukumar karamin kudin da ke ƙarin a tsakiyar jirgin gaba. Don transformashi da take 66kV zuwa ƙarin, ana nemi hukumar frequency response analysis (FRA) don masauka karamin kudin da ke ƙarin.

10.2 Binadama Tashin Kirkiro

Yi binadama tashin kirkiro a tsakiyar transformashi da amfani da hukumar voltage da ke ƙarin ko da hukumar induced voltage. Idan haka yana iya, amfani da hukumar series resonance induced voltage testing don haifar da sauki na alamun tashin kirkiro. Don transformashi da take 110kV zuwa ƙarin, ana nemi hukumar tashin kirkiro mai karfi ga neutral point. Bayanan tashin kirkiro suna da shawarar da aka bayyana a cikin kungiyoyin handover.

10.3 Tashin Kirkiro Mai Tsawon Loco Da Karamin Kudin

Don transformashi da take 220kV zuwa ƙarin, zai iya yi tashin kirkiro mai tsawon loco da karamin kudin a kan gwamnati a lokacin da aka fito. Don 110kV transformashi, ana nemi hukumar karamin kudin idan akwai duba game da kyau na insulation. Waɗannan tashin suna neman ingantaccen karamin kudin da ba suka kare a cikin transformashi.

10.4 Tashin Kirkiro Mai Tsawon Loco A Tsakiyar Jirgin Gaba

Yi da shawarar da takardun startup plan.

10.5 Tashe Da Rike

Tashe rike na transformashi, wanda ya kamata zai mutane da rike na grid.

Za mu iya tattauna canza a kan siffofin oil a wasu lamarin. Misali, oil a kan main tank yana da viscosity mai yawa a wasu lamarin, wanda yake da shi aiki da dukkar da kuma tsarki. Oil a kan on-load tap changer switching compartment a wasu lamarin zai iya haifar da lokaci na switching kuma zai iya haifar da tafakka ta transition resistors.

Don main tank oil system na EHV oil-immersed transformers, za mu iya tattauna canza a kan electrification na oil flow. Za mu iya kula electrification na oil flow zuwa discharge na oil flow tare da kontrollokan resistivity na oil, velocity na oil flow a wasu wurare, da kuma bayyana fadin kasa don release electrical charges a kan oil.