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An HVDC converter station (or simply converter station) is a specialised type of substation which forms the terminal equipment for a high-voltage direct current (HVDC) transmission line. [1] It converts direct current to alternating current or the reverse.
A high-voltage current transformer may contain several cores, each with a secondary winding, for different purposes (such as metering circuits, control, or protection). [7] A neutral current transformer is used as earth fault protection to measure any fault current flowing through the neutral line from the wye neutral point of a transformer.
A switching station is a substation without transformers and operating only at a single voltage level. Switching stations are sometimes used as collector and distribution stations. Sometimes they are used for switching the current to back-up lines or for parallelizing circuits in case of failure.
Some of New York City's downtown areas are powered by submersible network transformers of 500 to 2,500 kVA. Usually these transformers are in vaults below metal grates in the sidewalks. [3] Urban (spot) network transformer substations can be used to make interconnected distribution networks to serve a single facility.
Transformers designed for below-grade installation can be designed for periodic submersion in water. [14] Distribution transformers may include an off-load tap changer, which slightly adjusts the ratio between primary and secondary voltage to bring the customer's voltage within the desired range on long or heavily loaded lines. [citation needed]
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The step-up transformers behind the powerhouse, boosting the generator voltage to 115,000 volts for transmission. The Henry M. Jackson Hydroelectric Project , or Jackson Hydro Project , is an electric power generating project on the Sultan River operated and maintained by the Snohomish County Public Utility District in Washington , co-licensed ...
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