Reclosing control for coordinating a solid-state switch and a circuit breaker

A tangible, non-transitory computer-readable medium having instructions thereon which, upon being executed by one or more processors, provide for controlling current to a downstream circuit breaker of an electrical distribution system by execution of the following steps:

• obtaining a predefined peak current value for the electrical distribution system that includes a transfer switch system, a first power source, a second power source, a downstream transformer, and a downstream circuit breaker;
• obtaining a sensed current value associated with the first power source, the downstream circuit breaker, and the downstream transformer based on electrical measurements obtained by one or more sensors of the electrical distribution system;
• instructing a corresponding semiconductor switch assembly of the first power source to turn off in response to determining a fault in the electrical distribution system, the fault determined by comparing the sensed current value to the predefined peak current value;
• obtaining a reference current that indicates a trip threshold value for the downstream circuit breaker;
• obtaining, subsequent to the corresponding semiconductor switch assembly of the first power source being turned off, an updated sensed current value associated with the first power source, the downstream circuit breaker, and the downstream transformer from the one or more sensors;
• and
• instructing the corresponding semiconductor switch assembly of the first power switch to turn on based on an integrated value of the updated sensed current value matching an integrated value of the reference current, wherein the instructions to turn off and turn on the corresponding semiconductor switch assembly is repeated until the downstream circuit breaker clears the fault or until a preset maximum duration is reached.

A solid-state circuit breaker for controlling current to a downstream mechanical circuit breaker of an electrical distribution system, the solid-state circuit breaker comprising:

• one or more sensors configured to detect electrical measurements associated with powering a load between a power source and the downstream mechanical circuit breaker;
• one or more semiconductor devices;
• and
• a controller configured to:
• obtain a predefined peak current value;
• obtain a sensed current value associated with the power source and the downstream mechanical circuit breaker based on the electrical measurements obtained by the one or more sensors;
• instruct a corresponding semiconductor device of the solid-state circuit breaker to turn off in response to determining a fault in the electrical distribution system, the fault determined by comparing the sensed current value to the predefined peak current value;
• obtain a reference current that indicates a trip threshold value for the downstream mechanical circuit breaker;
• obtain, subsequent to the corresponding semiconductor device of the solid-state circuit breaker being turned off, an updated sensed current value associated with the power source and the downstream mechanical circuit breaker from the one or more sensors;
• and
• instruct the corresponding semiconductor device of the solid-state circuit breaker to turn on based on an integrated value of the updated sensed current value matching an integrated value of the reference current, wherein the instructions to turn off and turn on the corresponding semiconductor device are repeated until the downstream circuit breaker clears the fault or until a preset maximum duration is reached.