Control of Two Parallel Connected Inverters in a Standalone AC Power Supply System

A design for controlling of two parallel connected inverters in a standalone ac supply system and parallel operation of two inverters for load sharing conditions in grid are presented in this study. These schemes are suitable for the controlling of two parallel connected inverters to distribution system and to grid such as in distributed uninterrupted power supply (UPS) and isolated ac system. This system has two parallel connected inverters if in any case one inverter is failed then other inverter can supply power without any interruption and vice versa because these inverters are connected parallel to each other with relay to loads. All these interruption of power supplies are controlling from micro-controller with other equipment. Data and graphs are taken by PWM technology with duty cycle, CRO.