What type of voltage is specifically used in power distribution systems to ensure efficiency?

In power distribution systems, alternating current (AC) voltage is specifically used to ensure efficiency for several reasons. AC allows for the use of transformers, which can easily step voltage levels up or down. This is crucial for transmitting electricity over long distances. By stepping up the voltage, the current can be reduced, which minimizes power loss due to resistance in the wires. This is particularly important in power distribution, where long transmission lines are common, as it not only makes the transmission more efficient but also reduces the size of conductors needed.

Additionally, AC voltage can be generated and distributed more economically than direct current (DC) systems, especially in large-scale generation. The ability to easily convert between different voltages also enhances the overall flexibility and effectiveness of the power distribution network.

While reactive voltage and peak voltage are important concepts in electrical engineering, they do not specifically relate to the general efficiency of power distribution systems in the same way that AC voltage does. Reactive voltage is related to the reactive power in AC circuits and is not the voltage used for transmission. Peak voltage refers to the maximum voltage in a waveform but does not define the overall system efficiency.