JPS5983537A - Electrostatic induction pickup device for transmission line - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrostatic induction voltage extraction device for a power transmission line that can easily obtain a necessary and sufficient voltage.

Currently, the Mine Wall Law requires that aircraft obstruction lights be installed on power transmission line towers of a certain height or higher within designated areas. However, in the past, 100-volt power distribution lines were used to run the lights through isolation transformers, so in mountaintops and wilderness areas, there were no power distribution lines nearby, making it difficult to turn on the lights. There were many.

Therefore, in the past, a linear conductor was installed on the overhead power transmission line, and this was supported on the overhead power transmission line via an insulator to extract the voltage induced in the linear conductor by electrostatic induction. Six methods have been proposed for lighting neon discharge tubes, but although these methods may be possible in theory, they are completely impossible in practice. This is because the I-wire conductor is supported along the transmission line, so the transmission line must be strong enough to support the entire weight of the wire conductor and strong enough to withstand wind pressure. It is necessary to construct a strong transmission line that is different from the above.

In addition, in order to light up 2 to 4 neon tubes as aircraft obstacle lights by static 1 induced voltage induced in a linear conductor, a conductor length of several U meters is required. Therefore, it is practically impossible to attach the above-mentioned method to an existing power transmission line, and it is not practical.

The present invention has been made in view of the above points, and its purpose is to stretch a conductive wire insulated from the ground along a power transmission line between one to several spans of a transmission line tower,
It is an object of the present invention to provide an electrostatically induced voltage extracting device for a power transmission line which extracts the electrostatically induced voltage from the power transmission line induced in the conductive line via a transformer and obtains stable power necessary for driving a load.

Examples of the present invention will be described below. In the present invention, the intended purpose can be achieved without being restricted in any way by the presence or absence of a power distribution line for lighting the aircraft obstacle lights as in the conventional case. In other words, an Ll conductive wire suspended from the ground is strung between one or several spans of a power transmission line tower, an electrostatic induced voltage is generated from the power transmission line, and this is connected to the ground via a transformer and a neon tube. It is designed to light up.

The discharge tube prototyped with the above idea in mind was 10 mm in diameter.
A glass tube, several meters long, is made smaller by winding it into a spiral shape with a diameter of several tens of meters, and is filled with neon gas.
? When a current of 'lA was applied, several tens of candelas were obtained. According to the Civil Aviation Law, the obstruction light must be 10 candelas or more (according to the Aviation Obstruction Light Specifications established in 1961, the obstruction light must be 40 candelas or more).
Since it has been established that the power is higher than 100%, the results are quite satisfactory.

Furthermore, the light sources are installed at the top and the middle part of the tower, but the middle part needs to be visible from any direction around it, so a total of three discharge tubes are required.

Therefore, three discharge tubes are connected in series and Jii is connected to this circuit.
In order to flow lOfftA, in the case of a power transmission line of several IQKV, insulate the ground wire over a length of about several tens (11 (500f71 or more)) and use the capacitance between this and the power transmission line. However, this length is convenient because it corresponds to the standard span of the transmission line, but if the PIrW current cannot be taken in the palm span of the transmission line, the electrostatic induced voltage between multiple spans All you have to do is get it.

To explain the above with reference to Figures 1 and 2,
1.2 is sent! A ground wire 4 is connected to a power transmission line 5 between one end of the arms 3 and 3 attached to the top of the steel tower 1.2.
Further, a conductive wire 7 is stretched between the other ends of the arms 3, 3 via insulators 6, 6. The conductive wire 7 is stretched along the power transmission line 5, and the conductive wire 7 is not limited to being stretched between a pair of steel towers, but may be stretched across two or more steel towers to obtain the required length. be done. Further, as shown in FIG. 2, 8 m of the primary winding of the transformer 8 is connected between the wire 7 and the steel tower 1, which is insulated from the ground.
The secondary winding 8b is connected in series with a load, that is, an aircraft obstacle light 9 installed at the top of the tower 1 and an aircraft obstruction light 10.11 installed at the middle of the tower 1. In this case, since the aircraft obstruction lights are neon tubes, choke coils or current limiting closing resistors are connected in series.

Therefore, when power is transmitted to the power transmission line, an electrostatic response iC occurs between the insulated conductive wire 7 and the power transmission line 5 as shown in FIG. The induced voltage is stepped down or stepped up by the transformer 8, and the secondary side voltage is applied to the valley obstacle lights 9 to 11 through the lead wire 12 to turn on each obstacle light at a predetermined brightness.

In this example, when the power transmission voltage is low and the length of the ground wire 3 floating above the ground is long (500 m or more), the generated voltage is low, but the C between the power transmission line and the ground wire 3 floating above the ground is large ( large current,
(several tens of mA), there is enough power, so the transformer 8
If the voltage is increased, enough voltage (17KV) will be obtained to stably light 3 to 4 neon tubes.

Also, contrary to the above, if the power transmission voltage is high and the length of the gland wire suspended from the ground is short, C will be small and the current (several 10 mh) required to light the neon tube will not be obtained, but the generated voltage If the voltage is stepped down by the transformer 8, the current (several tens of FIA) necessary for lighting will be secured.

Incidentally, the conductive wire 7 stretched between the steel towers is of course grounded via a lightning arrester (not shown).

As described above, in the present invention, a conductive wire insulated from the earth is stretched along the power transmission line between part or several spans of the power transmission line tower, and the static electricity from the power transmission line induced by the conductive wire is Since the induced voltage is taken out via a transformer and used to drive the load, it is possible to stably supply the voltage and current necessary to drive loads such as aircraft obstruction lights, making it possible to light neon tubes with good quality. At the same time, even if the length of the conductive wire required to take out the electrostatically induced voltage becomes longer, it becomes easier to support it, and it is also possible to supply power quickly and safely even in areas where it is not possible to install power distribution lines. .

Although the above-described embodiments have been described with reference to aircraft obstacle lights, it is obvious that the present invention is not limited to these obstacle lights and can be applied to various devices.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an example of an electrostatic induction voltage extraction device for a power transmission line according to the present invention, and FIG. 2 is a diagram showing details of a part thereof. f12...Power transmission line tower, 3...Arm, 4...Ground wire, Death...Power transmission line, 6...Insulator, 7...
Conductive wire, 8...Transformer, 9.10.11...Aircraft obstruction light, C...Capacitance. Patent applicant Representative patent attorney Tadashi Monma −

Claims (1)

[Claims] A conductive wire is insulated from the ground and stretched along the power transmission line between one to several spans of the transmission line tower, and the conductive wire is induced to induce static [induced voltage] from the power transmission line, as well as to reduce the voltage between the conductive wire and the ground. Electrostatic induction in a power transmission line, characterized in that a primary winding of a transformer is connected to the transformer for stably supplying electric power, and a load such as an aircraft obstruction light is connected to the secondary side wire of the transformer. Voltage extraction device.