Convertible transfer switch

A method comprising:

• receiving, by a controller, a first set of electronic signals corresponding to a condition of a first power source and a second power source;
• isolating, by the controller, one of the first power source and the second power source from one or more loads by transmitting a first set of control signals to a switching device, the first set of control signals based on determining a fault condition at either the first power source or the second power source;
• receiving, by the controller, a second set of electronic signals corresponding to the condition of the first power source and the second power source;
• and
• determining, by the controller, a voltage, frequency, and/or phase of an isolated first power source or isolated second power source is synchronized with an other of the first power source and the second power source;
• connecting, by the controller, the isolated first power source or the isolated second power source to the one or more loads by transmitting a second set of control signals to the switching device, the second set of control signals based on determining a clearing of the fault condition at the isolated first power source or the isolated second power source;
• wherein each of the first set of electronic signals and the second set of electronic signals comprises the voltage, frequency, and/or phase angle of the first power source and the second power source;
• wherein the isolated first power source or the isolated second power source is connected to the one or more loads and the other of the first power source and the second power source when the voltage, frequency, and/or phase angle of the isolated first power source or the isolated second power source is within a predetermined range of the voltage, frequency, and/or phase angle of the other of the first power source and the second power source;
• and
• wherein the controller is further configured to operate the switching device in a grid-tied switching mode to simultaneously connect the one or more loads to the first power source and the second power source;
• wherein the first power source is a grid power source and the second power source is a distributed generation power source, and the grid power source, when connected to the distributed generation power source, is configured to receive power from the distributed generation power source that exceeds a requirement of the one or more loads.

A controller electrically communicable with a switching device, the switching device including a first semiconductor device pair and a second semiconductor device pair, the controller comprising a processor configured to:

• receive a first set of electronic signals corresponding to a condition of a first power source and a second power source;
• isolate one of the first power source and the second power source from one or more loads by transmitting a first set of control signals to the switching device, the first set of control signals based on determining a fault condition at either the first power source or the second power source;
• receive a second set of electronic signals corresponding to the condition of the first power source and the second power source;
• determine a voltage, frequency, and/or phase of an isolated first power source or isolated second power source is synchronized with an other of the first power source and the second power source;
• connect the isolated first power source or the isolated second power source to the one or more loads by transmitting a second set of control signals to the switching device, the second set of control signals based on determining a clearing of the fault condition at the isolated first power source or the isolated second power source;
• and
• wherein each of the first set of electronic signals and the second set of electronic signals comprise the voltage, frequency, and/or phase angle of the first power source and the second power source;
• wherein the isolated first power source or the isolated second power source is connected to the one or more loads and an other of the first power source and the second power source when the voltage, frequency, and/or phase angle of the isolated first power source or isolated second power source is within a predetermined range of the voltage, frequency, and/or phase angle of the other of the first power source and the second power source;
• and
• wherein the controller is further configured to operate the switching device in a grid-tied switching mode to simultaneously connect the one or more electrical loads to the first power source and the second power source;
• wherein the first power source is a grid power source and the second power source is a distributed generation power source, and the grid power source, when connected to the distributed generation power source, is configured to receive power from the distributed generation power source that exceeds a requirement of the one or more loads.