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Rikitar da Tsarin Yadda Ake Amfani Da Gabashin DC a Cikin Sistemai na HVDC

Rikitar da tsari na farko a cikin tushen ya bayyana yadda ake amfani da gabashin DC a cikin sistemai na HVDC. Duk da za su iya sanar da wadannan gabashin daga rikitar:

• NBGS – Neutral Bus Grounding Switch:Wannan gabashi ake kula da shi a matsayin ci. Idan ake kula, yana daya kan kayan aiki na converter zuwa ground pad na makaranta. Idan converter zaka iya yi aiki a nan hanyar bipolar da current mai kyau a bangaren yanayi, wanda yake da direct current mai kyau zuwa ground, wannan gabashi zaka iya zama da shi a cikin ci.

• NBS – Neutral Bus Switch:NBS yana haɗa da neutral connection na har yanzu. Idan yana faruwa a kan yanayin da keka, yanzu yana zama da shi a cikin ci, don haka yana inganta sistemar da faruwar.

• GRTS – Ground Return Transfer Switch:Haɗin kula da HVDC conductor zuwa neutral point yana da high-voltage circuit breaker da GRTS. GRTS yana amfani da shi a nan hanyar switching operation don kunna HVDC system don ground return monopolar ko metal return monopolar modes.

• MRTB – Metal Return Transfer Breaker:MRTB yana amfani da shi a nan hanyar GRTS don kawo DC load current bayan ground return mode (ground loop) da parallel mode (unused high-voltage conductor).

Bayani

• NBGS: A lokacin da ake yi aiki na gaba-gaba, NBGS ana kula da shi a matsayin ci don hana current mai kyau zuwa ground. Amma, a wasu abubuwa masu muhimmanci, misali a lokacin da ake yi aiki a nan hanyar bipolar da current mai kyau a bangaren yanayi, NBGS zaka iya zama da shi a cikin ci don ba da ingantaccen protection.

• NBS: NBS yana amfani da shi don inganta sistemar da faruwar. Idan yana faruwa a kan yanayin da keka, NBS zaka iya kawo neutral connection na har yanzu, don haka yana hana faruwar da zama da shi.
  GRTS: GRTS yana da muhimmanci a nan hanyar switching device don kawo waɗannan operating modes na HVDC system. Yana yi aiki a nan hanyar high-voltage circuit breaker don ba da stability da safety a lokacin da ake yi switching process.

• MRTB: MRTB yana amfani da shi don kawo DC load current bayan ground return mode da metal return mode. Wannan switching operation yana taimakawa a bincike efficiency da reliability na system.
  Daga baya ta amfani da waɗannan switchgear devices, HVDC system zaka iya kawo waɗannan operating modes, don haka yana ba da safe, reliable, da efficient system operation.