Substation Technician Certification Exam Prep 2025 – Complete Practice Test

The function of controlling the flow of power by adjusting current and voltage is crucial for the operation of a substation. Substations play a central role in the electrical grid, and one of their primary functions is to manage the distribution of electricity in an efficient and stable manner.

By adjusting current and voltage, substations ensure that electrical power is delivered safely and effectively to consumers. This involves regulating voltage levels to prevent overloads and minimize losses in the power system. For instance, if voltage levels are too high, it can cause damage to equipment; if they are too low, it can lead to inadequate power supply for users. Substations can use transformers to either step up or step down voltage, thereby controlling the current flow to meet consumption needs.

Additionally, controlling the flow of power is essential during peak demand times, ensuring that supply meets the fluctuating demands of the grid. This capability helps maintain stability and reliability in the power system, which is a critical aspect of modern electrical infrastructure.