摘要:
Methods and systems for reducing heat loss in a generator system are provided. The generator system includes an electrical generator and a power converter. The method includes generating electricity in the generator at a first power factor and converting electricity in the converter at a second power factor in a first mode of operation and generating electricity in the generator at a third power factor wherein the third power factor is greater than the first power factor and converting electricity in the converter at a fourth power factor wherein the fourth power factor is less than the second power factor in a second mode of operation such that the power output of the generator system in the second mode of operation is substantially equal to the power output of the generator system in the first mode of operation and the generator currents are facilitated being reduced.
摘要:
Methods and systems for reducing heat loss in a generator system are provided. The generator system includes an electrical generator and a power converter. The method includes generating electricity in the generator at a first power factor and converting electricity in the converter at a second power factor in a first mode of operation and generating electricity in the generator at a third power factor wherein the third power factor is greater than the first power factor and converting electricity in the converter at a fourth power factor wherein the fourth power factor is less than the second power factor in a second mode of operation such that the power output of the generator system in the second mode of operation is substantially equal to the power output of the generator system in the first mode of operation and the generator currents are facilitated being reduced.
摘要:
An overvoltage clipping device for clipping an overvoltage occurring at a main transformer of a wind turbine is provided. The overvoltage clipping device includes a detection unit for detecting an actual voltage level at the main transformer. The determination unit which is operatively connected to the detection unit determines whether the actual voltage level is above a predetermined reference voltage level. At least one switching unit is provided which is operatively connected to the determination unit for electrically coupling at least two transformer terminals of the main transformer. The control unit drives the switching unit if the detected actual voltage level is above the predetermined reference voltage level such that the at least two transformer terminals are electrically coupled to each other by the switching unit.
摘要:
According to the present disclosure, a wind turbine power generator (118) including a stator (120) comprising at least one stator segment (120, 121), a rotor (122) rotatably mounted in the stator (120, 121) and one or more conversion assemblies (210, 220, 222) is provided. The one or more power conversion assemblies (210, 220) are attached to the at least one stator segment (120, 121).
摘要:
A power supply device adapted for supplying electrical power to a load comprises a first electrical generator adapted for providing a first output current having a first phase angle; at least a second electrical generator adapted for providing a second output current having a second phase angle independent of the first phase angle; and a combination unit adapted for combining the first output current and the second output current to a combination current having reduced harmonics compared to the first and second output currents.
摘要:
The present disclosure is directed to a cable securement assembly for protecting cables and/or cable bundles within a wind turbine. The cable securement assembly includes a cable spacer having an inner surface and an outer surface separated by a thickness and one or more fastening components. The inner surface defines an open center configured to receive the plurality of cables therein. The inner surface defines a plurality of cable locations defined by one or more through holes configured through the thickness. The one or more fastening components are configured to secure one or more of the plurality of cables at each cable location via the through holes.
摘要:
A transformer arrangement for a wind energy system is described. The transformer arrangement includes a transformer core; a primary winding wound around the transformer core and adapted for being connected to an electrical load; a first secondary winding wound around the transformer core and adapted for being connected to a power source; and a control system for controlling the first transformer. Further, the transformer arrangement includes a part of a second secondary winding adapted for being connected to a power source and adapted for reducing at least one of for the voltage of the first secondary winding and the voltage applied to the electrical components of the wind turbine in the case of an overvoltage event.
摘要:
A power supply device adapted for supplying electrical power to a load comprises a first electrical generator adapted for providing a first output current having a first phase angle; at least a second electrical generator adapted for providing a second output current having a second phase angle independent of the first phase angle; and a combination unit adapted for combining the first output current and the second output current to a combination current having reduced harmonics compared to the first and second output currents.
摘要:
A method for detecting islanding conditions in an electrical grid having a power line voltage includes monitoring a detectable signal different from the power line voltage at a generating station, superimposing the detectable signal onto the power line voltage at a grid point outside the generating station, and switching the generating station from a grid-connected mode of operation to an islanded mode of operation when the signal to which the detector is responsive is determined to be absent.
摘要:
An overvoltage clipping device for clipping an overvoltage occurring at a main transformer of a wind turbine is provided. The overvoltage clipping device includes a detection unit for detecting an actual voltage level at the main transformer. The determination unit which is operatively connected to the detection unit determines whether the actual voltage level is above a predetermined reference voltage level. At least one switching unit is provided which is operatively connected to the determination unit for electrically coupling at least two transformer terminals of the main transformer. The control unit drives the switching unit if the detected actual voltage level is above the predetermined reference voltage level such that the at least two transformer terminals are electrically coupled to each other by the switching unit.