Ukosefu wa Matumizi ya Kudhibiti Uhalifu wa Kawaida wa Transformer na Kuzingatia Joto

1.Vitambulisho vya Kawaida na Hatua za Uchunguzi

1.1 Upasuaji wa Mafuta ya Transformer

1.1.1 Upasuaji wa Mafuta kutoka kwenye Vifuniko vya Tanka

Kwa upasuaji wa mafuta kwenye miundo yasiyo na magonjwa, kuweka chumvi ni inapatikana. Kwa upasuaji kwenye pembeni au miundo yenye ushirika wa mifuniko, mahali kamili cha upasuaji mara nyingi hakueleweki, na upasuaji unaweza kurudi baada ya kuweka chumvi kutokana na msongo wa ndani. Kwa hali kama hii, inapaswa kutumia kuweka chumvi na kupanua vibarabari vya chuma: kwa miundo miwili, vibarabari vya chuma vinaweza kupinduliwa kulingana na umbo la spindle ili kukagua; kwa miundo mitatu, vibarabari vya chuma vinapaswa kupinduliwa kulingana na umbo la pembeni kulingana na umbo kamili.

1.1.2 Upasuaji wa Mafuta kutoka kwenye Bushing

Upasuaji wa mafuta kutoka kwenye bushing mara nyingi unatokana na bushing kuvunjika au kuganda, usimbaji wa gasket zisizotakikana au kuvunjika, au kuregelea viti vya bushing. Ikiwa kondisheni mbili za awali zipo, inahitajika kubadilisha sehemu; ikiwa viti vimevunjika, yanapaswa kurudia kuongezeka.

1.2 Kutumia Core kwa Ngazi Nyingi

1.2.1 Mfumo wa Mwangaza wa DC

Toka kwenye mwito wa core wa transformer na tia nguvu ya DC kati ya core na tank kwa muda mfupi wa mvuto mkubwa wa DC. Mara nyingi, 3-5 mvuto huwa hayavyo kutosha kuhifadhi mipaka yasiyo matumizi, kuboresha sana vitendawili vya kutumia core kwa ngazi nyingi.

1.2.2 Uchunguzi wa Ndani

Kwa kutumia core kwa ngazi nyingi kutokana na kutokupeleka au kutokukata pin ya utaratibu baada ya uwekezaji, pin inapaswa kufanyika au kutokuka. Ikiwa karatasi ya insulation kati ya pad ya clamp na yoke imeanguka au imevunjika, inapaswa kubadilishwa na karatasi mpya ya ukubwa sahihi kulingana na masharti ya insulation. Ikiwa mguu wa clamp una dada sana kwenye core, kusababisha lami zinazovunjika zinapiga kwenye, hariri mguu wa clamp na rudia lami zinazovunjika ili kuhakikisha umbali sahihi wa insulation. Ondoa maudhui ya chuma, particles, na impurities kutoka kwenye mafuta, safisha sludge ya mafuta kutoka kwenye sehemu zote za tank, na, ikiwezekana, fanya kuchoma kwenye mafuta ya transformer ili kutoa maji.

1.3 Overheating at Connections

1.3.1 Connection of Conductive Rod Terminal

Transformer lead-out terminals are typically made of copper. In outdoor or humid environments, aluminum conductors must not be bolted directly to copper terminals. When moisture containing dissolved salts (electrolyte) infiltrates the contact surface between copper and aluminum, an electrochemical reaction occurs due to galvanic coupling, leading to severe corrosion of the aluminum. This rapidly damages the contact, causing overheating and potentially leading to serious accidents. To prevent this, direct copper-aluminum connections should be avoided.

2.Transformer Temperature Monitoring

2.1 Infrared Thermography

Infrared thermography uses an infrared detector to capture the infrared radiation emitted by the target, amplifies and processes the signal, converts it into a standard video signal, and then displays the thermal image on a monitor. Localized overheating in the conductive circuit, caused by poor contact in transformer leads, overload operation, or core multi-point grounding, can be effectively detected using this method.

2.2 Oil Surface Temperature Indication

The oil surface temperature indicator monitors the temperature of the transformer oil, provides alarm signals when limits are exceeded, and initiates protective tripping when necessary.

3.Conclusion

In the 21st century, with increasing societal dependence on power systems and their continued expansion, fault diagnosis and condition-based maintenance of power transformers have become crucial measures for advancing the transformation of China’s power system and improving the scientific management of electrical equipment. These practices represent a key direction and focus for future development in power generation.