AC Power Systems refer to electrical systems that use alternating current (AC) to deliver electricity. Unlike direct current (DC), where the flow of electricity is constant, AC changes direction periodically. This allows for efficient transmission of power over long distances, making it the standard for most electrical grids worldwide. In an AC Power System, generators produce electricity, which is then transformed and distributed through a network of transmission lines. Key components include transformers, which adjust voltage levels, and circuit breakers, which protect the system from overloads. Overall, AC Power Systems are essential for powering homes, businesses, and industries.