Published Paper Details:

One of the main concerns of the world economy is unstable power supply. On the load side, many present-day services and equipment cannot tolerate even momentary interruptions of utility supply. With the emergence of renewables, there are multiple sources where the power is generated but they cannot be used efficiently due to their intermittent nature in addition to the dangers of backfeeding. The problem of backfeed and the dangers caused by backfeed current can be overcome by isolating each source by means of relays. Whenever the system senses a disturbance, these isolators, under the command of a microcontroller, automatically isolate the power supply. These isolators can be realized by relays which in addition to isolating the power supply, can also be used to transfer the source of power to load from one supply to another. To switch from one power supply to another, rapid switching between different power sources is required. In addition to enabling backfeed protection, rapid switching also maintains power supply to the load without any interruption. Thus all transfers are open transitions and the sources are never connected to each other.