In response to increased voltage due to a drop in customer load, which device should a Transmission Operator bring online?

When there is a drop in customer load, the system can experience an increase in voltage levels due to reduced demand for electricity. To address this situation effectively, a Transmission Operator should consider bringing reactors online.

Reactors are devices that are designed to absorb reactive power from the electrical system, thereby lowering voltage levels when they are too high. By introducing reactors into the system, the overall voltage can be brought back down to within acceptable limits, helping to maintain system stability and reliability.

Capacitors, on the other hand, are typically used to provide reactive power support and increase voltage levels. They are not appropriate in this scenario where the issue is an over-voltage condition. Transformers are essential for voltage transformation and regulation but do not specifically address voltage control in the manner that reactors do. Voltage regulators can also assist with maintaining voltage levels, but using reactors specifically targets the prevention of over-voltage conditions caused by reduced load. This makes reactors the most suitable choice in a situation characterized by higher-than-desired voltage levels due to a decrease in customer load.