Gas Insulated Substations (GIS) are a type of electrical substation that use a high-voltage gas-insulated switchgear system. Here are some typical technical specifications for a GIS:
Voltage Level: GIS can operate at high voltage levels, typically ranging from 72.5 kV to 800 kV, depending on the application and grid requirements.
Insulation Medium: The primary insulation medium used in GIS is sulfur hexafluoride (SF6) gas, known for its excellent insulating properties and high dielectric strength.
Switchgear Configuration: GIS systems consist of various components such as circuit breakers, disconnectors, earthing switches, and current transformers, all enclosed in gas-tight compartments.
Compact Design: GIS systems are known for their compactness compared to traditional air-insulated substations (AIS), making them suitable for installations in densely populated urban areas or locations with limited space.
Modular Design: GIS systems are often designed with modular components, allowing for easier installation, maintenance, and expansion of the substation as needed.
Reliability and Safety: GIS systems are designed to be highly reliable and safe, with features such as gas monitoring and leakage detection systems to ensure the integrity of the insulation gas and prevent accidents.
Environmental Considerations: While SF6 gas has excellent insulating properties, it is also a potent greenhouse gas with a high global warming potential. As such, GIS manufacturers are increasingly focusing on developing eco-friendly alternatives or improving gas recovery and recycling systems to minimize environmental impact.
Operating Conditions: GIS systems are designed to operate in a wide range of environmental conditions, including extreme temperatures, humidity, and seismic activity, ensuring reliable performance in various geographical locations.
Control and Monitoring Systems: GIS systems are typically equipped with advanced control and monitoring systems to enable remote operation, real-time monitoring of equipment status, and predictive maintenance to minimize downtime and optimize performance.
Standards Compliance: GIS systems must comply with relevant international standards and regulations, such as IEC (International Electrotechnical Commission) standards, to ensure interoperability, safety, and reliability.
