Abstract: The technology is directed to a main-tie-tie-main (MTTM) power system. The MTTM system may include a first main protection relay controlling a first utility breaker and a second main protection relay controlling a second utility breaker. The MTTM system may further include a first tie protection relay controlling a first tie breaker and a second tie protection relay controlling a second tie breaker. The MTTM system may also include a common bus communicatively connecting the first main protection relay, second main protection relay, first tie protection relay, and second tie protection relay together. Each of the first main protection relay, second main protection relay, first tie protection relay, and second tie protection relay is connected to the common bus via one or more communication lines.

Abstract: The disclosed technology is directed to a power distribution architecture or network, and a protection and control scheme for the power distribution network. In one aspect of the disclosed technology, the backup generator bus is used as a tie between two independent power sources or mains used to supply electrical power to loads on the power distribution network. Another aspect of the disclosed technology is a protection scheme to detect and locate faults that may occur on the power distribution network. Another aspect of the disclosed technology is a control method or process for transferring loads from one source or main to another source or main in the event of planned or emergency transfers.

Abstract: Generally disclosed herein is a power system architecture for controlling self-healing operations for N number of feeder units. The power system architecture may restore power automatically to all feeder units when a loss of power occurs by reconfiguring the status of feeder unit breakers. The power system architecture may also reconfigure and restore power automatically by opening and closing feeder unit breakers when a loss of source returns. The power system architecture may further reconfigure and restore power automatically for as many feeder units as possible under abnormal conditions such as fault scenarios, breaker failures, operation failures, and relay failures.