摘要:
A wind turbine including a synchronous generator that converts rotary motion of a hub or rotor of the wind turbine to a variable frequency alternating current (AC) power. The wind turbine further includes a primary power system located within the wind turbine that transforms the variable frequency AC power to high voltage direct current (HVDC) power and provides the HVDC power to a load over an HVDC transmission line. A method corresponding to the flow of power through the wind turbine and a wind park comprised of a plurality of the wind turbines are also provided.
摘要:
A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional, integral derivative (PID) pitch controller. The torque controller controls generator torque using field oriented control, and the PID controller performs pitch regulation based on generator rotor speed.
摘要:
A wind turbine includes a wind turbine tower and a power electronic control system located within the wind turbine tower. The power electronic control system includes heat generating components. The heat generating components are directly mounted to the inner surface of the wind turbine tower dissipating the heat generated by the heat generating components directly to the inner surface of the wind turbine tower. In this way, a good thermal conducting path to the entire wind turbine tower is provided. A method for conducting heat generated in electronic equipment housed within a wind turbine tower uses the tower as a heat sink for cooling purposes.
摘要:
A sealed covering for exposed portions of electrical wires at an end of a protective tube, which houses a bus bar and has a cover shield, includes a plug. The plug includes two opposed hinged shells forming, when closed, a cavity for receiving a cable and a flange for engaging the cover shield. A method for enclosing at least one electrical splice between at least one electrical wire and at least one bus bar employs the sealed covering.
摘要:
A power supply system having a spot network is disclosed. The spot network may include first and second power output lines, and first and second accessory power circuits connected in parallel to the first and the second power output lines, respectively. Each of the first and the second accessory power circuits may have a transformer and a circuit breaker connected together to protect the spot network by coordinating impedance of the transformer with trip characteristics of the circuit breaker.
摘要:
A wind powered turbine with low voltage ride-through capability. An inverter is connected to the output of a turbine generator. The generator output is conditioned by the inverter resulting in an output voltage and current at a frequency and phase angle appropriate for transmission to a three-phase utility grid. A frequency and phase angle sensor is connected to the utility grid operative during a fault on the grid. A control system is connected to the sensor and to the inverter. The control system output is a current command signal enabling the inverter to put out a current waveform, which is of the same phase and frequency as detected by the sensor. The control system synthesizes current waveform templates for all three-phases based on a sensed voltage on one phase and transmits currents to all three-phases of the electrical system based on the synthesized current waveforms.
摘要:
A wind powered turbine with low voltage ride-through capability. An inverter is connected to the output of a turbine generator. The generator output is conditioned by the inverter resulting in an output voltage and current at a frequency and phase angle appropriate for transmission to a three-phase utility grid. A frequency and phase angle sensor is connected to the utility grid operative during a fault on the grid. A control system is connected to the sensor and to the inverter. The control system output is a current command signal enabling the inverter to put out a current waveform, which is of the same phase and frequency as detected by the sensor. The control system synthesizes current waveform templates for all three-phases based on a sensed voltage on one phase and transmits currents to all three-phases of the electrical system based on the synthesized current waveforms.
摘要:
A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional, integral derivative (PID) pitch controller. The torque controller controls generator torque using field oriented control, and the PID controller performs pitch regulation based on generator rotor speed.
摘要:
A variable speed system for use in systems, such as, for example, wind turbines, is described. The system comprises a wound rotor induction generator, a torque controller and a proportional integral derivative (PID) pitch controller. The torque controller controls generator torque using field oriented control, and the PID controller performs pitch regulation based on generator rotor speed.
摘要:
Methods and system are provided for operating an energy producing device when a utility grid is unavailable. The energy producing device includes a power system receiving power from a generator of the energy producing device. The power system includes a main power component and an accessory power component, where the received power is provided to the main power component and accessory power component depending upon the availability of the utility grid. The main power component provides the received power to the utility grid and the accessory power component provides power to accessories of the energy producing device, wherein the power includes the received power and power from an energy storage device included within the accessory power component.