The difference between PCS, inverters, and rectifiers

In the power system where the proportion of renewable energy is increasing, energy storage technology has become the key to balancing supply and demand and ensuring grid stability. As the core equipment of the energy storage system, the Power Conversion System (PCS) acts as an efficient "translator" and "traffic commander", achieving bidirectional energy conversion and intelligent management between the battery and the power grid. Converter "refers to a device that changes the form of current (electrical energy). In electrical engineering, electrical energy has different "forms", such as alternating current (AC): like a household socket, the direction of voltage and current changes over time. ·Direct Current (DC): Like a battery, the direction of voltage and current is constant. The function of a converter is to build a bridge, allowing electricity to freely convert between these different forms, just like a translator allows people of different languages to communicate with each other. If we compare "inverters" to a category of "fruits", then "rectifiers" and "inverters" are the "apples" and "bananas" among them. They are in a relationship of inclusion and being included. Inverter is a general term, which is specifically divided into rectifier and inverter according to the different conversion directions.