JP2636546B2 - Temperature signal transmitter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting a temperature near a charged portion such as an electric wire, converting the temperature into various temperature information signals, and transmitting the signals to a receiver on the ground for transmission.

[0002]

2. Description of the Related Art The temperature of electrical equipment and conductors rises abnormally due to an increase in leakage current due to overload, poor contact, or a decrease in insulation resistance. This temperature increase further promotes an increase in contact resistance and insulation deterioration, which may lead to a serious accident. Therefore, it is important to constantly measure and monitor the temperature of the charged part of the electric equipment in the maintenance and inspection of electric equipment such as prediction of an accident and determination of a failure point.

Hitherto, a suitable temperature monitoring device for a charging section, which is widely used, has not been developed. An obstacle in manufacturing the temperature monitoring device of the charging unit is that the insulation of the part that transmits the temperature information detected by the temperature sensor to the ground becomes large-scale, and the cost increases. At present, various methods for transmitting temperature information and the like of a charged portion to the ground by drawing glass fiber around the ground have been attempted.

[0004]

Anyone would argue that the method of transmitting by transmitting radio waves, infrared rays, ultrasonic waves, etc. is better than the method of transmitting by glass fiber because there is no insulation problem. I'm thinking about it. However, the problem in this case lies in the battery. When the battery is used by attaching it to a charging unit, the function stops when the battery is exhausted when a general battery is used as a power supply. When solar cells are used, they do not operate in dark substations and cubicles and at night.

[0005] The present invention addresses these drawbacks,
A temperature signal transmitting device is configured as a power source without using a special power source and using the energy of an electric field generated near a charged portion during livelines.

[0006]

In order to utilize the electric field energy, a current collector comprising two or one current collector is disposed near the charging part, and the current collector and the temperature sensor detect the current. A temperature signal transmitting circuit for processing the temperature and transmitting it to various types of temperature information signals and transmitting them to a receiving device on the ground is connected. The shape and size of the current collecting unit are set so that the electric power induced in the current collecting unit by the electric field near the charging unit at the time of live connection satisfies the power required to drive the temperature signal transmission circuit. The temperature signal transmitting device is configured as described above.

[0007]

The structure and operation of the temperature signal transmitting device of the present invention will be described with reference to FIG. In the figure, 10 is a temperature signal transmitting device, 1 and 2 are two current collector plates, 3 is a temperature signal transmitting circuit, 4 is a temperature sensor, and 5 is a receiving device. The current collector plate is a conductive electrode plate, and is generally provided in two layers around the charged part. The current collector 2 is for forming a capacitance Cs between the current collector 2 and the ground 7. The current collector plate 1 is disposed so as to form a capacitance Ci that is considerably larger than Cs between the current collector plate 1 and the charging unit 6. The capacitance Cp is also formed between the two current collectors 1 and 2. Cs is generally Ci or Cp
Much smaller than the capacity of

When an AC voltage Vo is applied between the charging section 6 and the ground 7 during a live line, an AC electric field is generated around the section, and
An AC voltage Vp expressed by the equation (1) is induced between the two current collecting plates 1 and 2, and the electric field energy E expressed by the equation (2) is obtained.
p is stored. Vp = CsVo / Cp (1) Ep = ω (CsVo) ² / 2Cp (2) where ω = 2πf.

The electric field energy stored between the current collector plates 1 and 2 is supplied as electric power for driving the temperature signal transmission circuit 3. The temperature signal transmission circuit 3 processes the temperature detected by the temperature sensor 4, converts it into a temperature information signal such as a temperature, a temperature rise, or a temperature abnormality alarm, and transmits it to the receiving device 5 for transmission. The magnitude of Ep in equation (2) is the temperature signal transmission circuit 3.
If Cs and Cp are set so as to satisfy the required power, the temperature signal transmitting device 10 of the present invention will stably continue its operation.

[0010]

FIG. 2 is a perspective view showing an embodiment in which the present invention is applied to a high-voltage insulated wire. Temperature signal transmitting device 1 of the present embodiment
Numeral 0 denotes a system for transmitting infrared pulses. In the drawing, the current collector plate 1 is formed in a cylindrical shape on an insulating coating 62 of a high-voltage insulated wire 61, and the current collector plate 2 is also formed in a cylindrical shape thereover via an insulating layer 13. . The case 8 provided on the insulating coating 62 houses the temperature signal transmission circuit 3 (not shown) therein.

The infrared light carrying the temperature information is transmitted from the transmission window 31 of the case 8 and transmitted to the receiving device 5 through the reception window 51. The two leads 14 and 15 supply the power generated between the two current collectors 1 and 2 to the temperature signal transmission circuit 3. The lead wire 41 has a temperature sensor 4 at its tip.
Is transmitted to the temperature signal transmission circuit 3.

The electric power constantly generated between the two current collectors 1 and 2 is not large. In the present embodiment, very large current collectors 1 and 2 are required to cause the temperature signal transmission circuit 3 to transmit frequently. However, how large the size of the two current collector plates 1 and 2 should be is a matter of a balance between the number of operations of the temperature signal transmission circuit 3 and the setting of the number of transmission operations. If the number of these operations is appropriately set and the power generated between the current collecting plates 1 and 2 other than during the operation of the temperature signal transmitting circuit 3 is charged in a capacitor or the like, the temperature signal transmitting device 10 Can provide a fairly large operating peak current.

In the embodiment shown in FIG. 2, an example in which the present invention is applied to the high-voltage insulated wire 61 is shown. However, the present invention can naturally be applied to a conductor such as a disconnector blade. in this case,
Since the current collector 1 is in direct contact with the conductor, the energy induced between the conductor and the current collector 2 can be directly used without providing the current collector 1. In this case, it is considered that the above-mentioned capacitance Ci is infinite, so the scope of the present invention includes such a special configuration.

In the embodiment shown in FIG. 2, the case 8 is mounted on the insulated wire 61. However, in order to make the whole compact, the case 8 is mounted on the current collector plate 2 and the temperature signal transmitting device is mounted. 10 can also be configured.

[0015]

According to the temperature signal transmitting apparatus of the present invention, there is no insulation problem, and there is no need to worry about battery consumption or deterioration. As long as the charging section is in a live state, the temperature information signal is transmitted stably and transmitted to the receiving device on the ground, so that the temperature of the charging section can be constantly monitored, and maintenance and inspection of substation facilities and the like can be greatly performed. Useful.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining the configuration and operation of a temperature signal transmitting device according to the present invention.

FIG. 2 is a diagram showing an embodiment in which the present invention is applied to a high-voltage insulated wire.

[Explanation of symbols]

 1 One of the two current collectors 2 The other one of the two current collectors 3 Temperature measurement and transmission circuit 4 Temperature sensor 5 Receiver 10 Temperature signal transmitter

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-51-85739 (JP, A) JP-A-58-16395 (JP, A) JP-B 7-111757 (JP, B2) JP-B-59-57 954 (JP, B2) JP-B 55-48351 (JP, B2)

Claims (1)

(57) [Claims] 1. A current collector comprising two or one current collector provided near a charging unit, and processing a temperature detected by a temperature sensor and transmitting the processed temperature information to a receiver on the ground as various temperature information signals. A power signal generated by the electric field near the charging unit when the shape or the size of the current collecting unit is hot, to drive the temperature signal transmitting circuit. Temperature signal transmitter set to satisfy required power.