A fuel cell power generation system that is mounted in a vehicle so as to be moved to a place that needs power is provided. The fuel cell power generation system and a control method thereof are capable of supplying stable voltage to a DC-AC power converter and/or an electric vehicle charger. It is possible to maintain constant voltage of electricity that is supplied to the DC-AC power converter and the electric vehicle charger using a battery capable of outputting DC voltage higher than output voltage of a fuel cell and to perform control such that a low current density period is avoided while voltage of the fuel cell is monitored, whereby durability is improved.

A method of controlling an alternator in a marine propulsion system includes receiving a demand value, wherein the demand value relates to an amount of output power produced by the engine that is demanded for propulsion of the marine vessel, and determining whether the demand value exceeds a demand threshold. The alternator is then controlled to reduce the charge current output to the battery and/or reduce a portion of engine output power from the engine that is utilized by the alternator when the demand value exceeds the demand threshold.

A method of controlling an alternator in a marine propulsion system includes receiving a demand value, wherein the demand value relates to an amount of output power produced by the engine that is demanded for propulsion of the marine vessel, and determining whether the demand value exceeds a demand threshold. The alternator is then controlled to reduce the charge current output to the battery and/or reduce a portion of engine output power from the engine that is utilized by the alternator when the demand value exceeds the demand threshold.

A power distribution system including a first power module and a second power module. The first power module including a first rectifier receiving an input power and outputting a rectified power, and a first power output configured to output the input power. The first power module further including a second power output configured to output the rectified power and a pass-through output configured to output input power. The second power module including a second rectifier receiving the input power and outputting a second rectified power, a third power output configured to output the input power, and a fourth power output configured to output the second rectified power.

A power distribution system including a first power module and a second power module. The first power module including a first rectifier receiving an input power and outputting a rectified power, and a first power output configured to output the input power. The first power module further including a second power output configured to output the rectified power and a pass-through output configured to output input power. The second power module including a second rectifier receiving the input power and outputting a second rectified power, a third power output configured to output the input power, and a fourth power output configured to output the second rectified power.

Systems and methods for power distribution may include a plurality of generation, distribution, and load nodes. A first generation node generates and transmits power to a first distribution node via a first transmission type, the first transmission type including MVDC or HVDC or LFAC. A second generation node generates and transmits power to a second distribution node via a second transmission type including HVAC. The first distribution node distributes the power to a first load node via the second transmission type, and distributes the power to a second load node via a third transmission type, the third transmission type including MVAC. The first load node transmits the power to a first subsea facility via one or more flow lines and the third transmission type. The second load node transmits the power to a second subsea facility via the one or more flow lines and the third transmission type.

A method and an apparatus for diagnosing an electronic apparatus are provided. The device for diagnosing an electronic device includes a master diagnosis block that generates a control signal when a diagnosis mode is started, a multiplexer that sequentially outputs a diagnosis power through a diagnosis power path based on the control signal, a slave diagnosis block that is sequentially supplied the diagnosis power through the diagnosis power path and generates diagnosis data of a power management circuit of the electronic device by using the diagnosis power, a modulator that transmits the diagnosis data by modulating a power signal of the diagnosis power path, and a demodulator that receives the diagnosis data by demodulating the power signal of the diagnosis power path and provides the diagnosis data to the master diagnosis block.

A method and an apparatus for diagnosing an electronic apparatus are provided. The device for diagnosing an electronic device includes a master diagnosis block that generates a control signal when a diagnosis mode is started, a multiplexer that sequentially outputs a diagnosis power through a diagnosis power path based on the control signal, a slave diagnosis block that is sequentially supplied the diagnosis power through the diagnosis power path and generates diagnosis data of a power management circuit of the electronic device by using the diagnosis power, a modulator that transmits the diagnosis data by modulating a power signal of the diagnosis power path, and a demodulator that receives the diagnosis data by demodulating the power signal of the diagnosis power path and provides the diagnosis data to the master diagnosis block.

An electric power supply system for an aircraft includes: a first electric source and a second electric source coupled together to supply electric power to a set of electrical loads, and a controller configured to acquire a piece of information on the current electric consumption consumed by the set of electrical loads; acquire a piece of information corresponding to a target ratio of the distribution, between the first and second electric sources, of the current electric consumption consumed by the set of electrical loads; perform frequency filtering of the current electric consumption to determine a transient consumption portion of the current electric consumption; determine control setpoints for the first electric source and for the second electric source in accordance with the target distribution ratio and with the transient consumption portion; and apply the control setpoints to the first and second electric sources.

A temperature monitoring apparatus configured to monitor a temperature of a portion of a vehicle's electrical energy distribution network is disclosed. The apparatus includes a first optical fibre including one or more temperature sensing sections, each temperature sensing section being for thermal contact with a portion of a vehicle's electrical energy distribution network. Each temperature sensing section is arranged to produce, in response to an optical input signal, an optical output signal indicative of the temperature of the temperature sensing section. The apparatus is arranged to determine a temperature of the portion of the vehicle's electrical energy distribution network based on one or more of the output optical signals in use.