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Understand the role of HV Gas-Insulated Substation, and gain insight on components and transformers.

• Role and function of a HV Substation
• Voltage levels associated with each network (LV, MV, HV, EHV, UHV)
• Network disturbances/distinguishing Internal & external insulation failures
• What factors determine the cost and architectural layout
• AIS vs. GIS
• Components found within an HV Substation
• SF6 Gas (general overview)
• Innovative solutions for both AIS and GIS

• Definition
• Enclosure & insulation materials
• Induced current
• Partitioning
• Connection interfaces: HV cables, overhead lines, transformer
• Rated characteristics (GE range)
• GIS circuit breaker: interrupting chamber breaking sequence, technological advancements, control & monitoring
• GIS disconnector
• GIS earthing switch including information on combined technology
• Surge arresters
• Instrument transformers: current & voltage transformers
• Busbars (GIL)

• Definition and Operating Principle: Transformation Ratio
• Components (Active Part, Winding Layouts, Insulation, Bushings, Conservator, Cooling System, broad overview Load vs. No Load Losses)
• Why and which Tap Changer is needed?
• Protection Devices (Lightning Arrester, Buchholz Relay, Pressure Relief Device)
• History of Power Transformers
• Power Transformer Applications: Generator Transformer, Auto-Transformers, Shunt Reactor, HVDC Convertor Transformer, Smoothing Reactor, Furnace Transformer, Interconnection Transformer, Step-Down Transformer, Rectifier Transformer, Trackside Transformer
• Transformer definition and specification: Insulation Levels, Impedance, Temperature Rise, Loss Capitalization, Transportation
• Maintenance Fundamentals

This suite of online courses is available in English.