Detailed Explanation of Common Issues and Solutions for High-Voltage Capacitors Detaalpuul ɗi koowa magana da amsa maka ga ƙananan kapaicin maimaito

Na'ibi Da Tashin Kirkiro​

Yawan tashin kirkiro yana da muhimmanci sosai wajen tsari na zamanin da take yi aiki da kuma yadda ake samu aikin. Wannan yana zama alamar muhimmanci wajen tafiya a cikin system na busbar na substation. Aiki mai gaba-gaban da ke faruwa a cikin kirkiro yana nuna tun daga mafasirin dielectric da kuma mafasirin resistance na masu shiga, inda mafasirin dielectric ke da 98% daga cikinsu. Mafasirin dielectric suna taka muhimmanci sosai ga tashin kirkiro. Wannan tushen tushen ya kunshi a wannan formula:

Pr = Qc * tgδ = ω * C * U² * tgδ * 10⁻³

​Mahimmiyar:​​

• Pr yana nufin aiki mai gaba-gaban da ke faruwa a cikin kirkiro mai tsayi
• Qc yana nufin aiki mai hanyar reyau
• tgδ yana nufin tangent na mafasirin dielectric
• ω yana nufin angular frequency na grid
• C yana nufin capacitance na kirkiro
• U yana nufin tashin kirkiro

Daga cikin wannan formula, ana iya tabbatar da cewa aiki mai gaba-gaban da ke faruwa (Pr) a cikin kirkiro mai tsayi yana da muhimmanci sosai ga karatu na tashin (U²). Idan tashi yake duba, aiki mai gaba-gaban da ke faruwa yake duba ta hanyar. Wannan takam yana ba da tara, kuma tara yana iya haifar da tsari na insulation na kirkiro. Duk da haka, idan ake yi aiki na kirkiro a matsayin tashin da ya fi girma, za a iya haifar da overcurrent, kuma za a iya haifar da kirkiro. Saboda haka, a cikin system na kirkiro mai tsayi, yana da buƙata da muhimmanci don yanayi devices na overvoltage protection.

▲ Tushen na Harmonics Mai Tsayi

Harmonics mai tsayi a cikin grid na power na iya haifar da kirkiro. Idan currents mai harmonics suka doke a kirkiro, suke sauki a cikin current mai fundamental, kuma suke duba peak value na current mai aiki da voltage mai fundamental. Idan capacitive reactance na kirkiro yana daidaita da inductive reactance na system, harmonics mai tsayi suke duba. Wannan dubawa na iya haifar da overcurrents da overvoltages, kuma suke iya haifar da partial discharge a cikin insulating dielectric na kirkiro. Wannan partial discharge na iya haifar da failures kamar bulging da group fuse blowing.

​▲ Na Busbar Loss-of-Voltage

Loss of voltage a busbar da kirkiro yana da shiga shine maimakon maimakon. Kirkiro da yake canzawa tashi na busbar a lokacin da yake yi aiki, yana iya haifar da tripping a supply side na substation ko kuma disconnection na main transformer. Idan ba ake koye kirkiro a lokacin wannan nasararsa, yana iya haifar da overvoltage. Duk da haka, idan ba ake koye kirkiro koɗa voltage yana ci gaba, yana iya haifar da resonant overvoltage, kuma yana iya haifar da transformer ko kirkiro. Saboda haka, device na loss-of-voltage protection yana da muhimmanci. Wannan device na zai ba da muhimmanci don kirkiro ya koye ta hanyar domin voltage yana ci gaba, kuma ya koye ne koɗa voltage yana ci gaba da kyau.

▲ Overvoltage Induced by Circuit Breaker Operation

Operation na circuit breaker na iya haifar da overvoltage. Saboda ake amfani da vacuum circuit breakers domin kirkiro, contact bounce a lokacin da take close, yana iya haifar da overvoltage. Duk da cewa wannan overvoltages na da peak mai karfi, ba za a iya jin da ita. Amma, a lokacin da take open (disconnection), overvoltages na iya haifar da kirkiro. Saboda haka, yana da buƙata don yanayi measures effective don reduce overvoltage na operation na circuit breaker.

​▲ Management na Tashin Kirkiro

Tashin kirkiro yana da muhimmanci sosai. Tashin mai karfi na iya haifar da tsari na zamanin da take yi aiki da kuma yadda ake samu aikin, saboda haka, yana da buƙata don yanayi control da management. ​Duk da cewa rate na capacity decline yana duba biyu har shekaru 10°C na tashi.​​ Kirkiro da suke yi aiki a tashin mai karfi da electric fields, suke yi aging gradual a cikin insulating dielectric. Wannan aging na iya haifar da mafasirin dielectric mai karfi, kuma suke haifar da tara internal. Wannan na iya haifar da tsari na aiki na kirkiro, kuma a lokacin da yake ci gaba, yana iya haifar da failure saboda thermal breakdown.

Don ba da safe operation na kirkiro, regulations na iya cewa:

• ​Idan tashin environment yana da 30°C, ventilation devices za su iya don cooling.
• ​Idan tashin environment yana da 40°C, kirkiro za su iya koye.

Saboda haka, temperature monitoring system yana da muhimmanci don track tashin kirkiro a baya. Duk da haka, forced-air ventilation measures na iya ba da muhimmanci don improve heat dissipation conditions, kuma ya ba da muhimmanci don ensure generated heat yana ci gaba da kyau through convection and radiation effective.