JPS6030188B2 - Electrostatic induction voltage extraction device for power transmission lines - Google Patents

Description

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

Currently, the Civil Aviation 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, the 100-volt distribution line was exclusively connected through an isolation transformer to turn on the light, so the
In the wild areas, there are no power distribution lines nearby, and it is often difficult to turn on the lights. Therefore, in the past, a linear conductor was placed along the overhead power transmission line, supported by the overhead power transmission line via an insulator, and the voltage induced by electrostatic induction in the linear conductor was extracted, causing neon discharge. Systems have been proposed in which the tube is turned on, but even if these directions are possible in theory, they are completely impossible to implement in practice. This is because the wire conductors are supported along the power transmission line, so the power transmission line needs to be strong enough to support the entire weight of the wire conductor and withstand wind pressure. Transmission lines must be constructed. It can also be used as an aircraft obstruction light.
In order to light four neon tubes using electrostatic induction voltage induced in a linear conductor, a conductor length of several hundred meters is required, so it is not possible to install the above method on an existing power transmission line. This is practically impossible and is not practical.

The present invention was made in view of the above points, and its purpose is to install a conductive wire insulated from the ground along the power transmission line between one or several spans of power transmission towers,
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 through a transformer to obtain stable power necessary for driving a load.

Examples of the present invention will be described below.

In the present invention, the desired objective 5 can be achieved without being constrained 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, there is no transmission line tower, and a conductive wire suspended above the ground is strung between several spans. This generates an electrostatic induced voltage from the transmission line, which is connected to the ground through a transformer and a neon tube. The discharge tube that was prototyped with the above idea in mind was a glass tube with a diameter of several 1 for the LI side.
Roll it into a spiral shape on the side of the ship to form 4. When filled with neon gas and energized by several tens of A, the result is several 1
0 candela was obtained. According to the Civil Aviation Law, the obstruction light must have a rating of io candela or higher (40 candela or higher according to the aviation obstruction light specifications established in 1968), so we were able to obtain satisfactory results. It is something. The light sources are designed to be installed at the top and middle of the tower, but the middle part needs to be visible from any direction around the tower, so a total of three discharge tubes are required.

Therefore, in order to flow several tens of mA through this circuit by connecting three discharge tubes in series, one tube with a length of approximately several hundred (500 or more) is required for a power transmission line of several volts. This length is convenient because it approximately corresponds to the standard span of a power transmission line, but the length is convenient because it approximately corresponds to the standard span of a power transmission line. If the required current cannot be obtained across a span, it is sufficient to obtain the electrostatic induced voltage between multiple spans.
To explain Figure 1 and Figure 2, 1 and 2 are power transmission towers.
A ground wire 4 is installed along a power transmission line 5 between one end, and a power transmission line 7 is extended between the other ends of the arms 3, 3 via insulators 6, 6.

This power transmission line 7 is stretched along the conductive wire 5, and is also a conductive wire? is not limited to between a pair of steel towers, but may be stretched across two or more steel towers in order to obtain the required length.
Further, as shown in FIG. 2, a secondary winding 8a of a transformer 8 is connected between the conductive wire 7, which is insulated from the ground, and the steel tower, and a load, i.e., a secondary winding 8b, is connected to the secondary winding 8b. An aviation obstruction light 9 installed at the top of the steel tower 1 and aviation obstruction lights 10 and 11 installed at the middle of the tower 1 are connected in series. In this case, since the aviation obstacle lights are neon tubes, there is a choke coil, and a current limiting resistor is connected in series. Therefore, if power is transmitted to the power transmission line, the insulated conductive wire 7 As a result of the capacitance C generated between them as shown in FIG. A voltage is applied to 9 to 1 obstacle lights to turn on each obstacle light at a predetermined brightness.

In this example, when the transmission voltage is low and the length of the conductive wire suspended from the ground is long (500 mm or more),
Although the generated voltage is low, the capacitance C between the power transmission line and the conductive wire 7 suspended above the ground is large (several 10
A) There is enough power, so if the voltage is stepped up from the transformer 8', a voltage (i7KV) sufficient to stably light 3 to 4 neon tubes will be obtained.

Conversely, if the power transmission voltage is high and the length of the conductive wire 7 suspended from the ground is short, C will be small and the current required to light the neon tube (several tens of amperes) will not be obtained. If the generated voltage is stepped down by the transformer 8, the current (several tens of amperes) required 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 ground is stretched along the power transmission line between one or several spans of the transmission line tower, and static electricity from the power transmission line induced in the conductive wire is Since the conduction voltage is taken out through 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, and it is possible to achieve good neon tube lighting. At the same time, even if the length of the conductive wire required to take out the electrostatic transfer voltage becomes longer, it becomes easier to support it, and it is also possible to easily and safely supply power even in areas where it is impossible to install distribution lines. can.

Although the above-mentioned embodiments have been described with reference to aviation 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. 1, 2…. ...Power line tower, 3...Earth, 4...
... Ground wire, 5 ... Power transmission line, 6.
... Insulator, 7 ... Conductive wire, 8 ... Transformer, 9, 10, 1 1 ... Aviation obstruction light, C ...
...Capacitance. Figure 2

Claims (1)

[Claims] 1. A conductive wire is insulated from the ground and stretched along the installed power transmission line between one or several spans of the transmission line tower, and electrostatic induction is caused by passing the capacitance between this conductive wire and the above power transmission line. In addition to generating voltage, the primary winding of a transformer is connected between the conductive wire and the ground to stably supply load power, and the secondary winding of the transformer is connected to a load such as an aircraft obstruction light. An electrostatic induction voltage extraction device for a power transmission line, characterized in that: