Substations are an important part of the electrical generation, transmission and distribution system. They transform voltage from high to low, or vice versa, and provide the ties, transformation, switching and protection of the transmission and distribution systems.
Transmission systems typically include generation switchyards, interconnecting transmission lines, autotransformers, switching stations and step-down transformers. Substations use large transformers to convert a generator’s voltage up to extremely high voltages for widespread distribution on the grid. Beta's substation projects have ranged from 15kV to 500kV.
One type of substation is an open air substation, which is the traditional design that uses the insulation properties of ambient air as an external insulating medium. These substations are generally constructed in an open, non-enclosed, non-atmospherically controlled environment and can be built either outdoors or indoors.
These air insulated substations (AIS) differ from gas insulated substations (GIS) in that the bus and equipment are more susceptible to the elements (temperature, contamination, animals, etc.) and they require much more space to build. However, air insulated substations also offer many advantages. They provide relatively easy access to bus and equipment for inspection and/or repair, they can be used for all voltage levels and they are generally cost effective and easy to expand in the future.
Beta’s electrical engineering team designs and builds high voltage projects across the country, specializing in EPC services for gas insulated substations (GIS), switchyards, substations and high voltage transmission lines.