System and method for protecting electrical machines

A method of protecting one or more electrical machines during a grid fault on an electrical system connected with the one or more electrical machines, said method comprising:

• connecting one or more electrical machines to an alternating current (AC) electric power system, wherein the AC electric power system is configured to transmit at least one phase of electrical power to the one or more electrical machines or to receive at least one phase of electrical power from the one or more electrical machines;
• electrically coupling at least a portion of a control system to at least a portion of the AC electric power system;
• coupling at least a portion of the control system in electronic data communication with at least a portion of the one or more electrical machines;
• detecting a grid fault of the AC electric power system based on one or more conditions monitored by the control system wherein detecting the grid fault on the electrical system comprises detecting whether the grid fault comprises a high voltage or another grid fault event;
• taking one or more first actions, by the control system, from a first set of actions based on the detected grid fault on the AC electric power system;
• detecting, by the control system, at least one operating condition of the AC electric power system after taking one or more first actions from the first set of actions based on the detected grid fault on the AC electric power system;
• and
• taking one or more second actions, by the control system, from a second set of actions based on the at least one detected operating condition of the AC electric power system.

A system for protecting one or more electrical machines during a grid fault on an electrical system connected with the one or more electrical machines, said system comprising:

• one or more electrical machines connected to an alternating current (AC) electric power system, wherein the AC electric power system is configured to transmit at least one phase of electrical power to the one or more electrical machines or to receive at least one phase of electrical power from the one or more electrical machines;
• and
• a control system, wherein the control system is electrically coupled to at least a portion of the AC electric power system and at least a portion of the control system is coupled in electronic data communication with at least a portion of the one or more electrical machines, and wherein said control system comprises a controller and said controller is configured to:
• detect a grid fault on an the AC electric power system, wherein the controller configured to detect the grid fault on the AC electric system comprises the controller configured to detect whether the grid fault comprises a high voltage event or another grid fault event;
• take one or more first actions from a first set of actions based on the detected grid fault on the electrical system;
• detect at least one operating condition of the AC electric power system after taking one or more first actions from the first set of actions based on the detected grid fault on the AC electric power system;
• and
• take one or more second actions from a second set of actions based on the detected at least one operating condition of the AC electric power system.