摘要:
A wind power generation facility (1) includes: a wind farm (10) including a plurality of wind turbine generators (12) each of which includes a synchronous generator (15); a local grid (2) to which the wind farm (10) is connected; a direct-current transmission channel (26) disposed between the local grid (2) and a grid (4); a sending end converter (22) for converting alternate current from the local grid (2) into direct current and supplying the direct current to the direct-current transmission channel (26); a receiving end converter (24) for converting the direct current from the direct-current transmission channel (26) into alternate current and supplying the alternate current to the grid (4); an abnormality detection part for detecting an abnormal event of the grid (4); and a first WF controller (30) for controlling the sending end converter (22) and adjusting a local-grid voltage phase (D SEC ) of the local grid (2) so as to reduce a load angle which indicates a difference between a generator voltage phase of the synchronous generator (15) of each wind turbine generator (12) and the local-grid voltage phase (D SEC ), when the abnormal event of the grid (4) is detected by the abnormality detection part.
摘要:
Problem Erosion damage that occurs to wind turbine blades is suppressed, and excellent lightning resistance performance is achieved. Solving Means A wind turbine blade includes a blade main body and a leading edge protector. The leading edge protector includes a conductive material and covers a leading edge of the blade main body. The leading edge protector is also electrically connected to at least one of a down conductor disposed in a hollow space enclosed by a skin in the blade main body and a conductive mesh member provided along an outer surface of the skin.
摘要:
An object is to prevent a situation in which, when a change in the frequency of a utility grid is to be recovered from, an increase or decrease in the generated output power becomes excessive, thus making a wind turbine generator unable to supply electrical power to the utility grid. A wind-curbine control device controls a wind turbine generator in which a rotor having a plurality of blades receives wind and rotates, a generator generates electrical power through the rotation of the rotor, the electrical power is supplied to a utility grid, and electric energy to be supplied to the utility grid can be changed according to a change in the frequency of the utility grid. A subtracter (62) of the wind-turbine control device calculates a frequency change, which is the difference between a measurement value of the frequency of generated output power of the wind turbine generator and a set value of the frequency of the generated output power of the wind turbine generator, and a limiter (66) limits a change in the electrical power corresponding to the frequency change calculated by the subtracter (62), based on the rotational speed of the generator.
摘要:
An object is to prevent a situation in which, when a change in the frequency of a utility grid is to be recovered from, an increase or decrease in the generated output power becomes excessive, thus making a wind turbine generator unable to supply electrical power to the utility grid. A wind-curbine control device controls a wind turbine generator in which a rotor having a plurality of blades receives wind and rotates, a generator generates electrical power through the rotation of the rotor, the electrical power is supplied to a utility grid, and electric energy to be supplied to the utility grid can be changed according to a change in the frequency of the utility grid. A subtracter (62) of the wind-turbine control device calculates a frequency change, which is the difference between a measurement value of the frequency of generated output power of the wind turbine generator and a set value of the frequency of the generated output power of the wind turbine generator, and a limiter (66) limits a change in the electrical power corresponding to the frequency change calculated by the subtracter (62), based on the rotational speed of the generator.
摘要:
A wind turbine blade has a blade body 11, a plurality of receptors 12, 13 embedded in and exposed to the surface of the blade body 11, a conductor layer 14 provided on the surface of the blade body 11 and connecting the receptors 12, 13 with one another and a downconductor 21 connected to the receptors 12, 13 and provided in the blade body 11. The downconductor 21 may be embedded in an insulator.
摘要:
Reactive power is supplied in accordance with a reactive-power supply instruction from a power grid while ensuring a variable-speed range of a wound-rotor induction generator. A variable-speed power generator (1) includes a prime mover that generates motive power by using natural energy; an electric generator (6) that includes a stator having a primary winding and a rotor having a secondary winding, the stator and the rotor being connected to a power grid (2), and that generates electric power based on the motive power generated by the prime mover; and a power converter (17) connected to the stator and the rotor, wherein the power converter (17) does not supply reactive power to the power grid (2), and wherein the variable-speed power generator (1) includes a power-converter controller (21) that causes the electric generator (6) to operate at a rotation speed set to be higher than or equal to a synchronous speed and increases reactive power supplied to the power grid (2) when a reactive-power supply instruction for supplying reactive power to the power grid (2) is obtained from the power grid (2).
摘要:
This invention improves accuracy of lightning strike simulation. There is provided a lightning strike simulation apparatus including a storage device (11) for storing lightning strike data, a setting unit (12) for setting a simulation target and the like in a simulation space, a downward leader advancing unit (13) for advancing a downward leader from a lightning strike start position set by the setting unit (12), an upward leader advancing unit (14) for advancing upward leaders from lightning strike-receiving candidate points set in the simulation space when a distance between a leading edge of the downward leader and a reference point is within a first threshold value, and a lightning strike point determination unit (15) for, when a distance between a leading edge of the downward leader and a leading edge of any one of the upward leaders is within a second threshold value, determining that the lightning strike-receiving candidate point corresponding to the any one of the upward leaders is a lightning strike point.