Muhimmanci abubuwa da ke tattara a kan HVDC da ingantaccen rambursa da kammalawa

Na bi Duka mai Kirkiya ba da Zero Crossing na Hukuma
Duka mai kirkiya ba da zero crossing na hukuma. Wannan ya shafi abin daɗi saboda kowane circuit breaker na DC na gine-gine sun yi amfani da zero crossing na hukuma don koyar da arc na kirkiya.

Impedance na Da Duka mai Kirkiya Ya Zama Kadan
Impedance na da duka mai kirkiya ya zama kadan. Wannan yana nufin cewa tsawon kirkiya a lokacin da dukuna ta faru a tushen DC ya zama mafi yawa, sannan masu voltaji a duk tarhin grid ya zama kadan.

Ko Nufin Koyar Da Dukuna a Tushen DC
Saboda impedance na kadan, ya zama abin daɗi ko nufin koyar da dukuna a tushen DC.

Abubuwa Mai Kirkiya Da Yanayin Semiconductor a Tushen DC
Abubuwa mai kirkiya da yanayin semiconductor a tushen DC - kamar Voltage Source Converters (VSCs), DC/DC converters, da DC circuit breakers - suna da thermal constants na kadan da kuma rated overcurrent capacities na kadan.

Masu Yawan Abubuwa Mai Kirkiya Da Yanayin Semiconductor
Sannan saboda masu yawan abubuwa mai kirkiya da yanayin semiconductor, ana buƙata da clear DC faults a lokacin da kadan, wanda yake da muhimmanci a yi aiki a lokacin da kadan ga protection systems.

Kudeta na Voltaji da Blocking na Converter
Idan voltaji na DC ya zama kadan zuwa 80-90% daga nominal value, voltage source converter zai block.

Capacitive Impedance a Tushen DC
Akwai tushen DC da suka da cables da parallel capacitive impedance na musamman. Saboda haka, capacitors a paben DC side of converters da DC filters sun iya samun capacitance mai yawa.

Bayanai
Ba da zero crossing na hukuma a duka mai kirkiya na DC yana shafi abin daɗi saboda circuit breakers na gine-gine sun yi amfani da wannan feature don koyar da arcs. Tsawon impedance na kadan a tushen DC yana haifar da tsawon fault current mafi yawa da kuma masu voltaji na grid kadan, wanda yake da abin daɗi ko nufin koyar da dukuna. Abubuwa mai kirkiya da yanayin semiconductor a tushen DC, kamar VSCs, DC/DC converters, da DC circuit breakers, suna da thermal capacity na kadan da kuma low overcurrent ratings, wanda yake da muhimmanci a yi clear fault da kadan don ba su kokarin lafiya. Sannan saboda masu yawan abubuwa, ita ce muhimmiyar a yi aiki a lokacin da kadan ga protection systems. Idan voltaji na DC ya zama kadan zuwa 80-90% daga nominal value, voltage source converters zai block. Saboda presence of capacitive impedance a tushen DC, including cables, converter capacitors, and DC filters, adds complexity to the system's behavior and fault management.