The term 'Power System' refers to a system of electrical power distribution, which is typically composed of a GRID of interconnected power sources. The GRID, which is often referred to as a GRID (4 letters), is responsible for providing electricity to homes and businesses. It is composed of power plants, transmission lines, substations, and other components that work together to deliver electricity to customers. The power system is also responsible for regulating the flow of electricity, ensuring that it is delivered safely and efficiently.