Voltage control refers to the management of electrical voltage levels in a power system to ensure stability and reliability. It involves adjusting the voltage to maintain it within specified limits, which is crucial for the proper functioning of electrical devices and the overall grid. Methods of voltage control include the use of transformers, capacitors, and reactors to either increase or decrease voltage levels as needed. Effective voltage control helps prevent issues like equipment damage, power outages, and inefficiencies in energy distribution, ultimately supporting a stable electrical supply for consumers.