Abstract: Provided is a method for performing AC optimal yield control within an inverter that includes a plurality of DC power sources configured to supply DC power, a plurality of converters to convert direct current power to alternating current power to be supplied to a load, a plurality of short-circuit protection devices connected to a DC interconnection bus at the DC power sources, and configured to provide short-circuit protection, a plurality of current sensors configured to sense circulation current at the short-circuit protection devices, and a controller. The controller controls the converters and monitors the circulation current sensed along the DC interconnection bus via the current sensors, and when power reduction occurs at one of the DC power sources, performs a closed-loop control current operation to controllably increase the circulation current along the DC interconnection bus to be greater than an impairment lower limit of the short-circuit protection devices.

Abstract: Provided is a method for performing AC optimal yield control within an inverter that includes a plurality of DC power sources configured to supply DC power, a plurality of converters to convert direct current power to alternating current power to be supplied to a load, a plurality of short-circuit protection devices connected to a DC interconnection bus at the DC power sources, and configured to provide short-circuit protection, a plurality of current sensors configured to sense circulation current at the short-circuit protection devices, and a controller. The controller controls the converters and monitors the circulation current sensed along the DC interconnection bus via the current sensors, and when power reduction occurs at one of the DC power sources, performs a closed-loop control current operation to controllably increase the circulation current along the DC interconnection bus to be greater than an impairment lower limit of the short-circuit protection devices.

Abstract: Provided is a method for performing automatic modularity control of an inverter and an inverter that includes DC power sources configured to supply DC power, a plurality of converters to convert direct current power to alternating current power to be supplied to a load, and a controller. The controller performs automatic modularity control of the plurality of converters, by separately controlling the plurality of converters and detecting an operation status thereof and performs fault detection at the plurality of converters at an early stage and isolates a respective converter of the plurality of converters, while continuously supplying power to the load via remaining converters of the plurality of converters. The automatic modularity control further includes early fault detection based continuous monitoring of the current produced by each converter and semiconductor switching feedback and cyclic starting of the inverter to normalize the lifecycle of the circuit breaker.