JP2002141192A - Lightning-protection ion dissipation device for wind power generation equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for preventing a thunderbolt from striking wind power generation equipment, which is installed high in a flat place without any obstacles so as to have high possibilities of receiving thunderbolts. SOLUTION: This lightning protection ion dissipation device is installed in the wind power generation equipment, dissipates onto the air ionic charges induced on the ground surface when thundercloud reaches the sky above it, and reduces the electrostatic potential difference in the sky so as to prevent the thunderbolt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a lightning protection system for a wind power generator.

[0002]

2. Description of the Related Art As a conventional example of a lightning protection system for a wind power generator, a lightning rod is known, and FIG. 1 shows the configuration thereof.

The wind power generator is composed of a windmill 11 rotated by wind power, a nacelle 12 having a built-in generator, and a pole 13 supporting the nacelle. A conventional lightning protection system uses a lightning rod 14 attached to the nacelle 12. Upon receiving a lightning strike, a lightning current is guided to a ground pole 16 by a conducting wire 15 and discharged to the ground.

[0004]

Since the wind turbine generator is installed high on a flat place without obstacles, there are many opportunities for lightning strikes. Therefore, sufficient measures are needed for lightning protection.

[0005] In view of the above, an object of the present invention is to provide a system for preventing a lightning strike on a wind power generator.

[0006]

The ion dissipator according to claim 1 or 2 is installed in a wind power generator, and the ion charge induced on the ground around the wind power generator when a thundercloud arrives above the wind power generator. To prevent lightning strikes by dispersing the light into the air and reducing the electrostatic field strength in the sky.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS When a thundercloud is generated and grows,
Separation of ionic charges existing inside the thundercloud progresses. Usually, positive charges are accumulated in the upper layer portion of the thundercloud, and negative charges are accumulated in the base portion.

When the thundercloud in such a state arrives in the sky, a projected charge (positive charge) having a polarity opposite to the ionic charge (negative charge) of the base portion of the thundercloud is induced on the ground surface under the thundercloud. . For this reason, an electrostatic potential difference is generated between the base portion of the thundercloud and the surface of the ground. If the electrostatic potential difference exceeds the dielectric strength of air, dielectric breakdown of air occurs and a lightning phenomena occurs.

At this time, if the amount of positive charges necessary to neutralize the negative charges at the base of the thundercloud is released from the ground surface to the sky, the electrostatic potential difference in the air is reduced, and lightning can be prevented.

[0010] It is an ion dissipator in a lightning protection system that emits this positive charge, and the present invention relates to an ion dissipator intended to be attached to a wind power generator.

FIG. 2 shows an ion dissipator according to the present invention, which includes a metal plate 21 of good conductivity such as copper, a plurality of ion dissipating metal needles 22 attached thereto, a fitting 23 for a nacelle of a wind power generator, and the like. It consists of.

FIG. 3 shows a modification of the above-mentioned ion dissipator. The ion dissipator comprises a well-conductive hollow metal tube 31, a plurality of ion-dissipating metal needles 32 attached to the tube, a metal fitting 33 for a wind turbine generator nacelle, and the like. I do.

FIG. 4 shows an application example of the ion diffuser shown in FIG. 2 and FIG. Symbols 11, 12, 1
Symbols 3 and 15 are the same as the symbols in FIG. Reference numeral 41 denotes the ion diffuser shown in FIGS. 2 and 3, and the mounting position may be on the side surface of the nacelle of the wind power generator, or on the upper surface or the rear surface. 42 is an ion diffuser 41
Are electrically connected to the conductor 15.
Reference numeral 43 denotes a surface charge collecting device, and a plurality of surface charge collecting electrodes 44 buried in the vicinity of the wind power generator, a wiring 45 for electrically connecting them, and a ground surface charge collecting electrode 44 connected to the conductor 15. Wiring 46 for continuous connection
Etc.

When the thundercloud C arrives above the wind power generator, an ion charge (positive charge) GC having a polarity opposite to that of the ion charge (negative charge) at the base of the thundercloud is induced on the ground surface around the wind power generator.

At this time, the surface ion charge (positive charge)
By collecting the GC and discharging it from the ion diffuser to the sky, the electrostatic potential difference in the sky is reduced and lightning is prevented.

[0016]

According to the present invention, the ion dissipator according to the present invention is installed in a wind power generator and electrically connected to a surface charge collecting device to form a lightning protection system. Can be reduced, thereby preventing a lightning strike on the wind turbine generator.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a conventional lightning protection system for a wind power generator.

FIG. 2 is an external view showing an ion diffuser according to the present invention.

FIG. 3 is another external view showing an ion diffuser according to the present invention.

FIG. 4 is a schematic diagram showing an application example of an ion diffuser according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Windmill 12 Nacelle 13 Support pole 14 Lightning rod 15 Conductor 16 Grounding pole 21 Good conductive metal plate 22, 32 Ion dissipating metal needle 23, 33 Mounting bracket 31 Good conductive hollow metal tube 41 Ion dissipator 42 Connection lead 43 Ground charge collection Device 44 Ground charge collecting electrode 45, 46 Wiring C Thunder cloud GC Ionic charge induced on the ground

Claims (2)

[Claims] 1. An ion dissipator for lightning protection of a wind power generator, comprising a highly conductive metal plate to which a plurality of ion dissipating needles are attached and a metal fitting for attaching the metal plate to a nacelle of the wind power generator. 2. An ion dissipator for a lightning protection device for a wind power generator, comprising: a hollow metal tube having a good conductivity, to which a plurality of ion dissipating needles are attached; and a metal fitting for attaching the metal tube to a nacelle of the wind power device.