An example electrical power system includes a DC bus connected to a load, a plurality of generators driven by rotation of a common shaft, and a plurality of power converters. Each power converter includes an active rectifier controller that operates a respective active rectifier to rectify AC from a respective one of the generators to DC on the DC bus. A load sharing controller is operable to provide a respective adjustment signal to each respective power converter that is enabled, the respective adjustment signals based on a difference between an average output current across all of the active rectifiers that are enabled, and a particular output current of the respective power converter. Each active rectifier controller is operable to determine a quadrature current value for its associated generator based on its adjustment signal.

An electrical system includes a plurality of synchronous electrical machines, and an electronic control unit structured to controllably trip a circuit breaking mechanism such as a relay coupling together the electrical machines. The control unit executes control logic to select trip options responsive to slip frequency between the synchronous electrical machines that is induced by a power swing.

The present disclosure is directed to a method for protecting an electrical power system connected to a power grid. The electrical power system includes at least one cluster of electrical power subsystems. Each of the electrical power subsystems defines a stator power path and a converter power path for providing power to the power grid. The converter power path includes a partial power transformer. The electrical power system further includes a subsystem switch configured with each of the electrical power subsystems and a cluster transformer connecting each cluster of electrical power subsystems to the power grid. A cluster switch is configured with the cluster transformer. A controller is communicatively coupled to each of the plurality of electrical power subsystems. Thus, the controller monitors the electrical power system for faults, and if a fault is detected in the cluster, sends, via one of the subsystem switches or the power converters, a block signal to the cluster switch.

A generator system, including first and second generators, a connection circuit connecting output lines of the first and second generators to each other and connecting neutral lines of the first and second generators to the ground, a switch command unit outputting commands to switch a connection mode of the first and second generators between parallel and series connection modes, a circuit switch switching a connection mode of the connection circuit in response to the commands, a data acquiring unit acquiring a waveform data of the first generator when the second generator is operated after the first generator is operated, and a control unit controlling the second generator to synchronize frequency and phase of waveforms of the first and second generators in the parallel connection mode and controlling the second generator to synchronize frequency and shift phase by 180 degree in the series connection mode.

Various embodiments disclosed herein provide protection to monitored equipment at both a local level and a system level, in order to offer more comprehensive protection. In one particular embodiment, the protected equipment may include one or more generators. The protection system may utilize time-synchronized data in order to analyze data provided by systems having disparate sampling rates, that are monitored by different equipment, and/or equipment that is geographically separated. Various embodiments may be configured to utilize a variety of sampling rates.

A set of generators are connected in parallel using a generator bus. At least one of the generators is associated with a controller. The controller detects an overload condition on the generator bus caused by a load and disconnects an initial generator from the generator bus in response to the overload condition. The initial generator continues to run during the overload condition after disconnecting from the generator bus but alternator excitation may be removed from the initial generator. The controller initiates starting one or more additional generator without alternator excitation. The controller also initiates connecting the initial generator and the one or more additional generators to the generator bus connected to the load. Alternator excitation is applied to the initial generator and the one or more additional generator so that adequate power may be applied to the load.