Tambayar da Karkashin Sababin Gwaji 35 kV Vacuum Circuit Breaker na Waje

Hukuma na Fasala

A ranar 23 ga watan Yuni, 2020, ya faru fasala a bayin gida da ke kusa kan 35 kV wanda yake cikin birnin 220 kV. Wannan ya sa hanyar tattalin fasalolin mafi tsawon da ta biyo a bayyana mai ba da suka a matsayin masu inganci na fasalolin No. 2 main transformer da kuma tattalin fasalolin mafi tsawon na 350 bus tie protection. Saboda haka, ya ci gaba da circuit breaker 352 a fadin haske da na gabashin No. 2 main transformer da kuma 350 bus tie circuit breaker, kuma ya zama babban fasala a bayin gida 35 kV Section I bus na birnin.

Sai idan wannan fasalan, an yi amfani da sabbin bayin gida ne na 35 kV system na birnin. An yi rike bayin gida mai suna bay tie circuit breaker a bayan duk bayin gida. Bayin gida 35 kV Section I wanda bayin gida da fasala ake ciki shi ne, ya da jami'an uku na gabashin gida da biyu na capacitor banks. Bayin gida da fasala ake ciki shi ne ta fi hot standby, kuma ba a san bayin gida da suka a matsayin masu inganci. Bayanan gida daban-daban su ne a yi aiki, kuma bay tie circuit breaker ta fi kisan gida.

Takamawa na Fasala

A nemi bayanan gida na 350 bus tie bay da kuma No. 2 main transformer bay, ana samun bayanan gida da suka a matsayin masu inganci, ana samun cewa a lokacin da fasala ta faru, ya faru a matsayin fasalolinsu a bayan B da C, kuma ya zama fasalolin mafi tsawon. Kafin haka, diagramma na fasalolin (screenshot) a fadin hasken No. 2 main transformer ya shahara a Figure 1.

Bayan a duba bayin gida da fasala, ana samun cewa bayan fasalan ta faru, bushing na phase A na vacuum circuit breaker ta jagoranci, post porcelain insulators na phases B da C suka jagoranci da kuma lead wires na circuit breaker suka jagoranci zuwa adadin duka. Babu alamomin fasala a cikin connection busbars, wall-bushing insulators, ko disconnectors na bayin gida side na circuit breaker. Duba primary equipment ta shahara a cikin Figure 2.

Wannan shi ne takamawa mai zurfi na sababin da circuit breaker ta kasance.

Sababon Daga Tsarin Circuit Breaker

Circuit breaker na wannan shi ne na LW8-35A (T) type. An yi fitowa da kuma a yi aiki a ranar Disamba, 2007, kuma an yi aiki a ranar Marto, 2008. Ya daga baya, akwai 11 vacuum circuit breakers na model na sama a birnin, kuma duka su ne a cikin gwargwadon gida. Bayan a duba mechanism na circuit breaker na model na sama, ana samun alamomin fasala zuwa adadin duka a cikin post porcelain insulators. Bayan a nemi fault recorder na birnin, ana samun cewa voltage na 35 kV bus ya jawo waɗanda suka fi tsawon da kuma ya faru trips a baya fasalan. Wannan abubuwan da suka jawo waɗanda suka fi tsawon ta zama alamomin cewa akwai alamomin fasala a cikin post porcelain insulators na model na circuit breaker.

An yi test na withstand voltage a cikin post porcelain insulators na circuit breakers 10 na model na sama a birnin. Taurukan bayan 9 su ne suka taka, kuma bayan 1 bayan ba suka taka. Idan bayin gida da fasala ta a yi test saboda, ya taka. Saboda haka, ya iya cewa tsari na circuit breaker ba ita ce sababinsu.

Sababon Daga Amfani Da Kirkiro Circuit Breaker

Birnin 220 kV na wannan shi ne a cikin birnin da ke kusa kan gidajen birnin da kuma gidajen birnin, kuma tana da quarry a cikin birnin. Akwai abubuwan da suka jawo waɗanda suka fi tsawon a cikin wurin birnin. A duba bayan gida, ana samun cewa akwai abubuwan da suka jawo waɗanda suka fi tsawon zuwa adadin duka a cikin surface of the post porcelain insulators na circuit breaker. A wurin da aka jawo waɗanda suka fi tsawon, tsarin insulation na post porcelain insulators za a dole.

Saboda muhimmancin masu amfani da aka duba bayan gida na outgoing lines na 35 kV system na birnin, ya bai da rashin karo a yi power outages. Saboda haka, ba a iya duba da kirkiro circuit breaker a baya fasalan. Voltage na flashover na post porcelain insulators na circuit breaker za a dole idan abubuwan da suka jawo waɗanda suka fi tsawon za a ji. Zaman lafiya ta kare, voltage na flashover ya zama ƙarin da operating voltage, kuma ya faru electrical discharge. A ranar da fasalan ta faru, ya faru rainy weather zuwa lokaci, kuma humidity na atmosphere ya zama ƙarin, kuma ya ji wannan abubuwa. Saboda haka, ana iya cewa wannan shi ne fasala na flashover da aka jawo waɗanda suka fi tsawon.

Amfani Da Fasala

An yi hakuri bayin gida da fasala. Bayan a yi commissioning a cikin birnin, test data na circuit breaker na bayan ta daidai da requirements na ex-factory technical documents. Ya daga baya, circuit breaker ta aiki da kyau.

An yi power outages don duba circuit breakers na model na sama a birnin. An yi cleaning da kuma wiping off contaminants, kuma an yi insulation spraying saboda. An yi comprehensive inspection, maintenance, da kuma characteristic test a cikin har circuit breaker, kuma abubuwan da aka samun suka taka. Ya daga baya, circuit breakers 10 na outdoor na model na sama a birnin su aiki da kyau.

A baya, za a yi comprehensive inspection da kuma technical renovation a cikin outdoor circuit breakers a wurare. Za a yi hakuri saboda Gas Insulated Switchgear (GIS) equipment don yanayi fasaloli da aka jawo waɗanda suka fi tsawon a wurare da abubuwan da suka jawo waɗanda suka fi tsawon.

Abubuwan Da Su Ke Nema Don Yanayi Fasala

• Masu design units za su yi tasiri a matsayin darasi, za su yi optimization da structure, kuma za su yi tsarin insulation na circuit breakers a wurare da abubuwan da suka jawo waɗanda suka fi tsawon (kamar building shelters ko using GIS equipment).

• Equipment manufacturing units za su iya kontrollo quality management na equipment, kuma za su iya yi technological requirements na each link a cikin processes na equipment manufacturing, assembly, da kuma commissioning.

• Operation and maintenance units za su iya yi aiki da kyau a matsayin daily maintenance da inspection na equipment. Za su iya yi tasiri a matsayin protection signals a birnin, musamman signals kamar frequent activation na fault recorder. Za su iya yi investigation da analysis da problems, za su iya samun actual operating status na equipment, kuma za su iya yi evaluation da analysis na equipment da kyau.

• Equipment management units za su iya yi aiki da kyau a matsayin acceptance na new equipment entering the grid, za su iya strengthen daily management na equipment, kuma za su iya improve reliability na power supply.