An electrical power system of a wind turbine is provided. A power converter of the wind turbine is configured to convert electrical power generated by an electrical generator of the wind turbine and to provide the converted electrical power to a power grid. The electrical power system includes an inductor unit coupled between a grid side converter section of the power converter and the power grid. Electrical power provided by the power converter towards the power grid causes a voltage drop across the inductor unit. The power system further includes an inductance adjustment unit coupled to the inductor unit. The inductance adjustment unit is configured to adjust an inductance value of the inductor unit to thereby adjust the voltage drop across the inductor unit.

It is an object of the present invention to provide a drive system including an induction generator comprising some primary windings that has a main winding and an auxiliary winding, the drive system being capable of supplying electric power required by an auxiliary inverter, even in a regenerative mode of operation in which only the auxiliary winding is energized. The maximum current value of a converter for power generating is set on the basis of the maximum output power of the auxiliary winding of the induction generator and the minimum voltage applied to the auxiliary winding unless a traction inverter is in a regenerative mode of operation, and the non-load current value of the induction generator is set such that the maximum current in the auxiliary winding under the situation of the traction inverter being in the regenerative mode of operation does not exceed the maximum current in the converter for power generating.

The application relates to a stability-control method and system for grid-connected system of double-fed wind farm, which belongs to the technical field of wind power generation system. The method comprises: collecting operation state parameters of each unit in the system; according to the operation state parameters of each unit, determining a mutual voltage between the units, an interlocking phase angle between the units, and a sub-synchronous current of each unit; according to the mutual voltage between the units, the interlocking phase angle between the units and the sub-synchronous current component of each unit, determining an energy coefficient of each unit, and then obtaining a total energy coefficient; according to the total energy coefficient, regulating the operation state parameters of each unit.

A method for controlling an inverter-based resource (IBR) connected to a power grid during a grid event includes operating the IBR based on a first virtual impedance reference prior to the grid event, the first virtual impedance reference being used for determining a first virtual impedance of the IBR defining a first virtual reactance and a first virtual resistance. The method also includes receiving an indication of a start of the grid event that causes a change in the first virtual impedance reference to a second virtual impedance reference. Immediately after the change in the first virtual impedance reference, the method includes activating a soft activation module for outputting a second virtual impedance defining a second virtual reactance and a second virtual resistance that maintains a magnitude of the second virtual impedance at or above a magnitude of the second virtual impedance reference so as to reduce current in the inverter-based resource. At a certain time period after activating the soft activation module, the method includes transitioning the second virtual reactance and the second virtual resistance to a virtual reactance and a virtual resistance defined by the change.

An electrical system for a mobile power generation device and a mobile power generation device are disclosed. The electrical system includes an electrical cabin and a generator switch cabinet located inside the electrical cabin and including a generator switch device, the generator switch device being configured to connect or disconnect the generator of the mobile power generation device from an external load, the electrical system further includes an auxiliary substation cabinet and an auxiliary substation switch device in the auxiliary substation device cabinet, the auxiliary substation cabinet is located inside the electrical cabin and includes an auxiliary substation device, the auxiliary substation device being configured to convert a first voltage output by the generator into a second voltage; and the auxiliary substation switch device is configured to turn on or turn off the auxiliary substation device, the first voltage being larger than the second voltage.

A generator configured to supply power to a load, including an engine, an alternator configured to be driven by the engine and to output AC power, a converter configured to convert the AC power output from the alternator into DC power, an inverter configured to convert the DC power converted by the converter into AC power and to supply the AC power to the load, and a control unit configured to variably control a value of a voltage output from the converter according to the load.

A sensor device includes a first sensor element that generates a first sensor signal based on a varying magnetic field; a second sensor element that generates a second sensor signal based on the varying magnetic field; a signal processing circuit configured to generate a first pulsed signal based on the first sensor signal and generate a second pulsed signal based on the second sensor signal; a fault detector that detects a fault and generates an error signal indicating the fault; and an output generator that receives the error signal based on a first condition that the fault detector detects the fault, and simultaneously outputs a first output signal and a second output signal. In response to the first condition being satisfied, the output generator maintains the first output signal in a steady state and outputs the second pulsed signal as the second output signal.

A generator includes an internal combustion engine including an engine block including a cylinder including a piston, a crankshaft configured to rotate about a crankshaft axis in response to movement by the piston, and a spark plug configured to periodically generate a spark to ignite fuel in the cylinder to control the movement of the piston. The generator further includes an alternator including a rotor and a stator, the rotor configured to rotate with the rotation of the crankshaft to generate alternating current electrical power, a controller configured to control a rate of fuel supply to the internal combustion engine, and a switch configured to selectively enable the flow of a first type of fuel into the cylinder and disable the flow of a second type of fuel, wherein the controller is configured to receive an indication of a fuel type based on a position of the switch.

A condition-based monitoring system receives a plurality of measurements from sensors measuring mechanical and electrical aspects of a prime mover and a synchronous machine. The condition-based monitoring system determines a correlation between the mechanical measurements and electrical measurements to estimate parameters of the model. The condition-based monitoring system also updates the model as sensors obtain additional measurements during operation of the prime mover.

Disclosed in the present invention is a safety control method for a generator of a gas turbine power plant. The method includes the following steps: acquiring a safe power-receiving range value of a load, determining an output voltage of the generator, acquiring a ratio of rated power of the generator to a rotational speed of the generator, and acquiring a temperature difference between an internal temperature and an external temperature of the generator. In the present invention, stable voltage output of the generator is ensured by controlling the rotational speed, the number of turns of an output coil winding and a torque output value of the generator, such that stability and safety of operation is improved, an energy utilization rate is improved, and great significance for energy conservation, emission reduction, and energy loss reduction is achieved.