Transmission Equipment

Shunt Reactor

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Definition

An inductive device connected between a transmission bus or the line itself and ground, used to absorb reactive power (MVAR) and control overvoltages on lightly loaded EHV lines and AC cables. Long Extra-High-Voltage overhead lines and underground cables generate large amounts of capacitive charging current continuously, causing dangerous Ferranti Effect voltage rise under no-load or light-load conditions. Shunt reactors counteract this by consuming reactive power; they may be permanently connected (fixed reactors) or switched by circuit breakers as loading conditions change (switched reactors).

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Topic Deck

Transmission Equipment

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Source

FERC Pro Forma OATT / LGIP

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