JPH0547449A - Discharge monitor device - Google Patents

Abstract

PURPOSE:To enable discharge to be monitored with high reliability by providing a fluorescent discharge collector in the vicinity of a discharge gap, and further providing an optical fiber for transmitting output from the collector and a detector circuit to generate an indication signal based upon the judgement that discharge is taking place. CONSTITUTION:The fluorescent output end of a fluorescent discharge collector 11 is optically connected to an optical fiber 14 via an optical connector 13, and an output signal from the collector 11 is transmitted to a monitor place via the fiber 14. A fluorescent output signal 20 is converted into an electrical signal E in the ODE conversion section of a detector circuit 15 and amplified by a signal amplification section 17. Thereafter, the output signal 20 is inputted to a detection section 18 having a threshold value. When an electrical signal Ed exceeding the threshold value is detected, the detection section 18 judges discharge as occurring in a discharge gap on a steel tower, and sends a signal for instructing a display section 19 to make reporting. According to this construction, information can be displayed, regarding a steel tower having the collector 11, a discharging arrester, the accumulated discharge frequency of the arrester or the like, and the behavior of the discharge gap can be detected even in the daytime, thereby improving the reliability of a discharge monitor device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention optically protects an extra-high voltage transmission line from abnormal voltage such as lightning stroke by electrically operating the lightning arresters, arcing horns, and lightning rods provided on the tower. The present invention relates to a discharge monitoring device that detects and monitors at a remote monitoring place.

[0002]

2. Description of the Related Art FIG. 12 is a side view of a main portion showing a conventional technique. A power transmission line 1 is suspended via a insulator device 2 on a support fitting 3 fixed to a power transmission tower (not shown), and both ends of the insulator device 2 are suspended. A discharge gap 4 is formed between a pair of arcing horns 4A and 4B projecting from the horn, and the discharge gap 4 is discharged by an abnormal voltage such as lightning surge, thereby causing the insulator ratio of the insulator device to rise. Ba is blocked. However, in the discharge of the discharge gap 4, the power transmission line 1 that should hold the transmission voltage is in a ground fault state, and a power transmission failure occurs. Therefore, in order to prevent such a situation, for example, a zinc oxide lightning arrester 5 is provided from the tower toward the power transmission line 1, and a series discharge gap 6 is formed between the discharge electrode 6A and the arcing horn 4C on the power transmission line side. However, the mutual discharge start Vt characteristics are adjusted in advance so that the discharge of the series discharge gap 6 occurs earlier than that of the discharge gap 4 with respect to the abnormal voltage. By providing such a protection device, when an abnormal voltage exceeding a predetermined level occurs in the power transmission system, the series discharge gap 6 starts to discharge, the discharge current is bypassed to the ground side via the lightning arrester 5, and the lightning arrester operates. Since the abnormal voltage is suppressed to a limiting voltage higher than the transmission voltage, discharge of the flooder bar of the insulator device 2 and the arcing horn gap 4 and the ground fault of the transmission line 1 due to this are avoided, and the transmission line is set to the transmission voltage. Is maintained and power transmission is continued.

On the other hand, whether or not the arrester 5 has operated normally,
Alternatively, in order to intensively monitor whether there is any abnormality in the arcing horn from a distant monitoring place, the discharge monitoring device 1
0 is provided. The discharge monitoring device 10 is, for example, the lightning arrester 5
A through-type current transformer 7 is provided on the side of the support metal 3 of the device, the discharge current flowing through the lightning arrester is detected, the detected current is converted into an optical signal by the 0 / E converter 8, and this optical signal is converted into an optical fiber-
It is known that the device is configured to transmit to a detection circuit (not shown) arranged at the monitoring place.

[0004]

A conventional discharge monitoring device 10 using a current transformer requires a drive power source for the O / E converter 8. Generally, there is no low-voltage distribution line parallel to the ultra-high-voltage power transmission line, and it is unrealistic to supply the low-voltage power to the discharge monitoring device placed on the tower except in some urban areas. .. It is also possible to add a solar power generation device to the discharge monitoring device, but in that case it is necessary to maintain and manage the power supply device such as the solar cell and battery, and the power transmission tower in the mountainous remote area is regularly patrolled. A huge amount of labor is required for maintenance work.

An object of the present invention is to obtain a discharge monitoring device which is capable of optically detecting the operation of the discharge gap even in daylight without requiring a power source, has a simple structure and is excellent in reliability.

[0006]

In order to solve the above-mentioned problems, according to the present invention, the discharge in the discharge gap provided on the transmission tower exposed to the atmosphere is monitored by detecting discharge light. A fluorescent discharge collector disposed near the discharge gap for converting the discharge light into fluorescent light of a predetermined wavelength and outputting the fluorescent light, and an optical fiber for transmitting the fluorescent output of the fluorescent discharge collector to a monitoring location. And a detection circuit for O / E converting the transmitted fluorescence and for emitting a display signal by determining that discharge has occurred in the discharge gap when the amplified electric signal exceeds a predetermined level. And

Further, it is assumed that the fluorescent discharge collector is an optical fiber having a core mixed with a fluorescent dye having a maximum absorption wavelength in a wavelength range of 500 nm or less.

Further, it is assumed that the fluorescent discharge collector is provided with a light shielding means on the incident side of the direct sunlight.

Further, it is assumed that the detection circuit includes a filter for cutting DC noise generated in an electric signal due to external light noise.

On the other hand, the discharge gap consists of a series discharge gap formed between the arcing horn on the transmission line side and the discharge electrode on the surge arrester side supported by the steel tower, and the fluorescent discharge collector is in the vicinity of the discharge electrode. Which is arranged to monitor the operation of the arrester by detecting the discharge of the series discharge gap. Alternatively, a discharge gap is formed between the arcing horn on the transmission line side and the arking horn on the tower side, and the fluorescent discharge collector is arranged in the vicinity of the arking horn on the tower side. A device configured to monitor the discharge of a king horn. Alternatively, the discharge gap is a minute gap formed between an impedance grounded lightning rod and a steel tower, and a fluorescent discharge collector is arranged in the vicinity of the minute gap so as to detect a lightning discharge. To do.

Further, the fluorescent output of the fluorescent discharge collectors arranged at a plurality of positions on the steel tower is converged by an optical coupler into a single optical fiber and transmitted to a monitoring place. ..

[0012]

In the structure of the present invention, a fluorescent discharge collector arranged near the discharge gap exposed in the atmosphere on the power transmission tower and converting the discharge light into fluorescence of a predetermined wavelength and outputting it.
And an optical fiber for transmitting the fluorescence output of the fluorescence discharge collector to a monitoring place, and O / E conversion of the transmitted fluorescence, and when the amplified electric signal exceeds a predetermined level, discharge is generated in the discharge gap. Since the fluorescent discharge collector that receives the discharge light of the discharge gap functions as a light emitting source of fluorescent light having a longer wavelength than this, the fluorescent output Since it can be transmitted to the place where light is monitored, an O / E converter is not required on the tower side and power supply is not required. In addition, the detection circuit detects the fluorescence transmitted to the monitoring place by the optical fiber.
By converting and emitting a display signal when the magnitude of the electric signal exceeds a predetermined level, a function of discriminating the discharge light from the external light noise and detecting it can be obtained.

If the fluorescent discharge collector is composed of a fluorescent optical fiber having a core mixed with a fluorescent dye having a maximum absorption wavelength in the wavelength range of 500 nm or less, the difference in the wavelength range from the direct sunlight is utilized. The fluorescent dye absorbs the discharge light having the main part of the spectrum in the wavelength region, converts it into fluorescence, and transmits the fluorescence to the optical fiber optically coupled to the end face.

Further, when the light-shielding means is provided on the side of the fluorescent discharge collector where the direct sunlight is incident, the influence of the direct sunlight incident on the fluorescent discharge collector is eliminated, and the external light noise is small even in daylight, and the discharge light is reduced. Can be obtained with high accuracy.

Furthermore, if the detection circuit is provided with a filter for cutting DC noise generated in the electric signal due to the external light noise, the DC generated in the electric signal due to the incident of the external light into the fluorescent discharge collector. A function of removing noise and improving the S / N ratio of the electric signal can be obtained.

On the other hand, if the fluorescent discharge collector is arranged near the discharge electrode of the lightning arrester, the function of detecting the discharge current flowing in the lightning arrester by the discharge light of the series discharge gap and monitoring the operation of the lightning arrester can be obtained. Further, if the fluorescent discharge collector is arranged near the tower side arcing horn and the discharge between the pair of arcing horns is monitored, the lightning arrester's A function to monitor abnormal operation can be obtained. Further, by disposing the fluorescent discharge collector in the vicinity of the minute gap formed between the lightning rod grounded to the impedance ground and the steel tower, the function of monitoring the lightning discharge to the steel tower can be obtained.

Further, if the fluorescent output of the fluorescent discharge collectors arranged at a plurality of positions on the steel tower is converged by the optical coupler into one optical fiber and transmitted to the monitoring place, the discharge gap is formed. The function of discriminating the steel tower that has generated the discharge can be obtained by the simplified discharge monitoring device.

[0018]

EXAMPLES The present invention will be described below based on examples. FIG. 1 is a configuration diagram showing a discharge monitoring device according to an embodiment of the present invention, and the same components as in the prior art will be designated by the same reference numerals, and duplicate description will be omitted. In the figure, a fluorescent discharge collector 11 is provided with a light-shielding means 12 on the incident side of direct sunlight. For example, a fluorescent discharge collector formed in the shape of an optical fiber has its fluorescent output side via an optical connector 13 and an optical fiber-14. Is optically coupled to
Fluorescent output 20 transmitted to the surveillance site by an optical fiber
Is converted into an electric signal E by the O / E conversion unit 16 of the detection circuit 15, amplified by the signal amplification unit 17, and then input to the detection unit 18 having a threshold value, and the electric signal Ed exceeding the threshold value is inputted. When is detected, the detection unit 18 determines that a discharge has occurred in the discharge gap on the steel tower and outputs a signal for instructing notification to the display unit 19, whereby the fluorescent discharge collector-11 is arranged. Information such as a steel tower, a lightning arrester that has discharged, and the cumulative number of discharges of the lightning arrester is displayed.

FIG. 2 is a principle explanatory view showing the operation of the fluorescent discharge collector, which includes a fluorescent core 11A and a clad 11B.
In the fluorescent discharge collector 11 formed as a fluorescent optical fiber composed of the following, the fluorescent core 11A has a polymethylmethacrylate (PMMA) and a polycarbonate (PMA).
C), etc. made of a small amount of a special fluorescent dye 11C mixed in, and of the incident light 100 that passes through the clad 11B and enters the fluorescent core 11A, the transmission wavelength component 102 passes through the fluorescent core and is transmitted to the outside. The absorption wavelength component 101 is absorbed by the fluorescent dye 11C, converted into fluorescence having a wavelength different from the absorption wavelength component, and emitted in all directions without directivity. Then, the fluorescence whose incident angle to the clad 11B is smaller than a predetermined angle propagates as propagating light 110 inside the fluorescent core 11A toward its end face, and the optical connector 1
3 is transmitted to the optical fiber-14 optically coupled.

FIG. 3 is a characteristic diagram showing the energy distribution of the wavelength of the discharge light in the air in comparison with that of direct sunlight, and the energy ratio of direct sunlight with an elevation angle of 30 ° or less is maximum in the wavelength region of 450 nm or more. While having a value, most of the light energy of the discharge light in the air gap is distributed in the wavelength region of 300 nm order. Further, when the direct sunlight has an elevation angle of 11 ° or less, the influence on discharge light energy in the air is small.
Therefore, if the light shield 12 is provided on the side of the fluorescent discharge collector 11 where the direct sunlight is incident, the effect of the direct sunlight can be eliminated, and the fluorescent discharge collector 11 that can detect the discharge light even in daylight can be obtained. The surrounding structures may be used as a light shield.

FIG. 4 shows a fluorescent discharge collector in the embodiment.
It is a wavelength transmittance characteristic diagram of, pe of BASF Japan
rylen fluorescent dye (trade name yellow083), and naphtali
The characteristics of the collector obtained by mixing 0.02% of each of mid dyes (trade name: violet570) in PMMA are shown as an example. In the figure, yellow083 absorbs light in the wavelength region of about 480 nm or less and converts it into yellowish fluorescence, which has a property of transmitting discharge light having a wavelength of 400 nm on the order of 1/2. Is a yellowish optical fiber
Since it has little transmission loss and easy O / E conversion, it can be used as a fluorescent discharge collector. Also, vi
The olet570 absorbs a wavelength of about 380 nm or less and converts it into violet fluorescence. Since its absorption region matches the wavelength of discharge light, the discharge light can be efficiently converted into fluorescence.
A fluorescent discharge collector that is less affected by extraneous light noise can be obtained.

Fluorescent discharge collector having the above structure
Since the discharge light is converted into strong fluorescence and outputted, the fluorescence output can be transmitted as it is to the monitoring place through the optical fiber, so that the O / E converter and its power source are not required on the tower side. Therefore, the convenience that it can be easily installed in a steel tower in a remote mountain area can be obtained. Further, since the fluorescent discharge collector has heat resistance to withstand a high temperature of 300 ° C and excellent fluorescent holding power, it is excellent in long-term reliability, and the patrol inspection for reliability confirmation can be saved.

FIG. 5 is a time chart showing the operation of the discharge monitoring apparatus according to the embodiment. When a discharge occurs at time t ₀ , the fluorescent discharge collector 11 produces a fluorescent output similar to that of the discharge light. .. At this time, the output P ₀ due to external light noise is superimposed on the fluorescence output as a DC component. Detection circuit 15
The fluorescence output arrives at the O / E conversion unit 16 of the optical fiber 14 with a delay of the propagation time Δt of the optical fiber 14, and an electric signal rising from the direct current component E ₀ to E at time t ₁ is output.
Is amplified by. Therefore, the detection unit 18 sets the threshold value to the direct current component E _0, and when the input voltage E exceeding this is detected, the display unit 19 outputs a signal notifying the occurrence of discharge to the display unit 19. Displays information such as the tower number at which the discharge occurred, the discharge generation phase, and the cumulative number of times the discharge occurred.

FIG. 6 is a block diagram of a detection circuit portion showing a different embodiment of the present invention. In the detection circuit 25, the external optical noise voltage E ₀ (included in the electric signal E amplified by the signal amplification section 17 ( It is different from the above-mentioned embodiment in that a filter 20 for cutting off a direct current component) is provided. Here, the external light noise P ₀ included in the fluorescent light output of the fluorescent discharge collector-11 has a long time change of a minute order, while
Since the change of the discharge light is an extremely short change of μs to second order, the voltage E ₀ due to the external light noise can be easily removed by the filter 25 to improve the SN ratio of the signal voltage. The advantage of more reliable detection is obtained.

FIG. 7 is a side view of the essential part showing a further different embodiment. In the figure, a fluorescent discharge collector 11 for monitoring the operation of the lightning arrester 5 is fixed to a head metal fitting so as to surround the discharge electrode 6A of the lightning arrester 5, and monitors the discharge of the series discharge gap 6, and its fluorescent output is an optical connector. It is coupled to the optical fiber 14 by 13 and transmitted to the detection circuit 15 or 25 (not shown) arranged at the monitoring place. In the discharge monitoring device configured as described above, a function of detecting the discharge current flowing in the lightning arrester by the discharge light of the series discharge gap and monitoring the operation of the lightning arrester can be obtained. Also, a pair of
The discharge of the discharge gap 4 composed of the king horns 4A and 4B is monitored by the fluorescent discharge collector 11 supported by the support fitting 3 of the insulator device 2 via the light shield 12, and the fluorescent output thereof is measured by the optical fiber. It is transmitted to the detection circuit via 14. In this way, by monitoring the discharge of the discharge gap 4, the ground fault position of the power transmission line can be known, and the discharge gap can be compared with the signal on the series discharge gap side of the lightning arrester side which should originally operate first. Information is obtained to judge mutual protection coordination.

FIG. 8 shows the fluorescent discharge collection in the above embodiment.
FIG. 3 is a plan view of the connector as viewed from the incident side of discharge light.
12 is a fluorescent discharge collector formed in the shape of an optical fiber
Mount 11 by bending or on the coil
Configured to couple to optical fiber-14 via connector 13
The outer peripheral surface of the fluorescent discharge collector (of the clad
The surface is the incident surface of the discharge light, and the intensity is visible even in daylight.
The high discharge light is converted into fluorescence. In addition, the light shielding plate 12
Direct sunlight with a high elevation angle is directly incident on the fluorescent discharge collector.
Since it is configured so that it does not,
Iss level P ₀Is reduced. Therefore, high SN ratio
The advantage of being able to transmit a high fluorescence output to the detection circuit.
It

FIG. 9 is a cross-sectional view showing another embodiment of the fluorescent discharge collector, which is a clad 1 covering the fluorescent core 11A.
This is different from the above-described embodiment in that a light shielding film 31A is formed on the surface of 1B so as to cover an angle region that blocks the incidence of direct sunlight. By using a semi-transmissive film having directivity that reflects direct sunlight and absorbs or transmits external light noise that is incident along with the discharge light as the light-shielding film, it is possible to obtain a fluorescence output with a high SN ratio.

FIG. 10 is a side view of the essential part showing another embodiment of the present invention, which is constructed so as to monitor a direct lightning strike on a steel tower. In the figure, a lightning rod 53 is supported on the top of a grounded steel tower 51 via an insulating material 52, and the lightning rod is a grounding impedance (resistance or inductance) 5
It is connected to a steel tower through 4. A small discharge gap 56 is formed between the lower end of the lightning rod 53 and the discharge electrode 55 on the steel tower side, and a fluorescent discharge collector 11 for monitoring the discharge of this discharge gap is fixed to the steel tower and the fluorescent output is provided by an optical fiber. It is configured to transmit to a detection circuit (not shown) via -14. By monitoring the discharge of the lightning rod in this way, it is possible to identify the steel tower that has been directly hit by lightning at the monitoring location.

FIG. 11 is a block diagram showing another embodiment of the present invention, in which one optical fiber 14 of each of the fluorescent discharge collectors 11 arranged in one iron tower is provided by an optical coupler 60. It differs from each of the above-described embodiments in that it is connected to the optical fiber 64 of FIG. 1 and is configured to transmit the fluorescence output to a detection circuit (not shown). In the lightning arrester in the above-described embodiment, since the monitoring data of the cumulative number of times of operation becomes important information for maintenance management of the operation duty of the lightning arrester, it is necessary to count the number of times of operation of each of the plurality of lightning arresters on the tower. On the other hand, since the discharge gap 4 between the pair of arcing horns is not as important as the lightning arrester, the operation of the arcing horns provided for each phase on the tower is collectively performed to generate the discharge. If the steel tower can be identified, it is possible to easily inspect whether there is any abnormality in the arcing horn during patrol inspection.
Therefore, by applying the discharge monitoring device according to this embodiment, the fluorescence output can be transmitted by the single optical fiber-64, and the number of optical fiber lines and the number of detection circuit lines, which increase the installation cost, are reduced. Thus, there is an advantage that the discharge monitoring device can be simplified.

[0030]

As described above, according to the present invention, a fluorescent discharge collector which is arranged in the vicinity of the discharge gap provided in the atmosphere on the transmission tower and converts the discharge light into fluorescence of a predetermined wavelength and outputs it. And an optical fiber for transmitting the fluorescence output of the fluorescence discharge collector to a monitoring place, and the transmitted fluorescence O /
A detection circuit for E-converting and amplifying the detected electric signal to judge that discharge has occurred in the discharge gap when the amplified electric signal exceeds a predetermined level is provided. as a result,
The fluorescent discharge collector that receives the discharge light of the discharge gap,
O / E conversion required on the tower side in the prior art using a current transformer because it functions as an emission source of fluorescence having a longer wavelength and can directly transmit the fluorescence output to the detection circuit via the optical fiber. It is possible to provide a discharge monitoring device that does not require a vessel and its power source and can be easily installed in a steel tower in a remote mountain area.

If the fluorescent discharge collector is composed of a fluorescent optical fiber having a core mixed with a fluorescent dye having a maximum absorption wavelength in the wavelength range of 500 nm or less, the difference in the wavelength range from sunlight is utilized. The discharge light having the main part of the spectrum in the above wavelength region can be converted into fluorescence with low external light noise, and the fluorescence output that has become propagation light in the fluorescence optical fiber is transmitted from the end face to the optical fiber with low loss. It is possible to provide a discharge monitoring device including a fluorescent discharge collector that can be used. Further, since the fluorescent discharge collector has a simple structure and is excellent in weather resistance and does not require maintenance and management unlike the photovoltaic power generator, there is an advantage that the labor of patrol inspection can be reduced.

Further, if the light-shielding means is provided on the side of the fluorescent discharge collector on which the direct sunlight is incident, the influence of the direct sunlight incident on the fluorescent discharge collector can be eliminated, and the fluorescent output with little extraneous light noise can be obtained even in daylight. It is possible to provide a discharge monitoring device that includes a fluorescent discharge collector that can be transmitted toward a detection circuit.

Furthermore, if the detection circuit is provided with a filter for cutting the DC noise generated in the electric signal by the external light noise, the external light is incident on the fluorescent discharge collector and is generated in the electric signal. The advantage that the DC noise can be removed and the S / N ratio of the electric signal can be improved is obtained.

On the other hand, if the fluorescent discharge collector is arranged in the vicinity of the lightning electrode of the lightning arrester, the discharge monitoring device of the lightning arrester is provided which can detect the discharge current flowing in the lightning arrester by the discharge light of the series discharge gap and monitor the operation of the lightning arrester. can do.
If a fluorescent discharge collector is installed near the tower-side arcing horn and the discharge between the pair of arcing horns is monitored, the ground fault position of the power transmission line can be known and It is possible to provide a discharge monitoring device that can obtain information for judging the protection coordination of the discharge gaps by comparing with the signal on the side of the series discharge gap on the side of the arrester to be operated first. Further, by disposing a fluorescent discharge collector in the vicinity of a minute gap formed between a lightning rod that is grounded by impedance and a steel tower, it is possible to provide a discharge monitoring device having a function of monitoring lightning discharge to the steel tower. You can

Further, if the fluorescent output of the fluorescent discharge collectors arranged at a plurality of positions on the steel tower is converged by the optical coupler into one optical fiber and transmitted to the monitoring place, the discharge gap is reduced. It is possible to economically advantageously provide a simplified discharge monitoring device having a function of identifying a discharged steel tower.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a discharge monitoring device according to an embodiment of the present invention.

FIG. 2 is a principle explanatory view showing the operation of the fluorescent discharge collector.

FIG. 3 is a characteristic diagram showing the energy distribution of the wavelength of discharge light in the air in comparison with that of direct sunlight.

FIG. 4 is a wavelength transmittance characteristic diagram of a fluorescent discharge collector in an example.

FIG. 5 is a time chart showing the operation of the discharge monitoring apparatus according to the embodiment.

FIG. 6 is a block diagram of a detection circuit portion showing a different embodiment of the present invention.

FIG. 7 is a side view of a main part showing still another embodiment.

FIG. 8 is a plan view of the fluorescent discharge collector in the above-described embodiment as seen from the incident side of discharge light.

FIG. 9 is a sectional view showing another embodiment of the fluorescent discharge collector.

FIG. 10 is a side view of the main part showing another embodiment of the present invention.

FIG. 11 is a block diagram showing another embodiment of the present invention.

FIG. 12 is a side view of a main part showing a conventional technique.

[Explanation of symbols]

 1 Transmission Line 2 Insulator Device 3 Supporting Metal 4 Discharge Gap 4A Ark Horn 4B Ark Horn 4C Ark Horn 5 Lightning Arrester 6 Series Discharge Gap 7 Current Transformer 8 O / E Converter 9 Optical Fiber- 10 Discharge Monitoring Device 11 Fluorescent Discharge Collector-11A Fluorescent Core 11B Clad 11C Fluorescent Dye 12 Light Shield 15 Detection Circuit 20 Filter 25 Detection Circuit 31 Fluorescent Discharge Collector-31A Shading Film 51 Steel Tower 53 Lightning Rod 54 Ground Impedance 56 Discharge Gap 60 Light Coupler 64 optical fiber

Claims (8)

[Claims] 1. A discharge gap, which is exposed on the power transmission tower in the atmosphere, is monitored by detecting discharge light, and the discharge light is arranged near the discharge gap and the discharge light is predetermined. , A fluorescent discharge collector for converting and outputting the fluorescent light of the wavelength, an optical fiber for transmitting the fluorescent output of the fluorescent discharge collector to a monitoring place, and the transmitted fluorescent light
A discharge monitoring apparatus, comprising: a detection circuit which outputs a display signal by determining that a discharge has occurred in the discharge gap when the electric signal amplified by E / E conversion exceeds a predetermined level. 2. The fluorescent discharge collector has a maximum absorption wavelength of 5
The discharge monitoring device according to claim 1, which is a fluorescent optical fiber having a core mixed with a fluorescent dye having a wavelength range of 00 nm or less. 3. The discharge monitoring device according to claim 1, wherein the fluorescent discharge collector is provided with a light shielding means on the incident side of direct sunlight. 4. The discharge monitoring device according to claim 1, wherein the detection circuit includes a filter for cutting DC noise generated in an electric signal due to external light noise. 5. The discharge gap is a series discharge gap formed between an arcing horn on the transmission line side and a discharge electrode on the surge arrester side supported by a steel tower, and a fluorescent discharge collector-
2. The discharge monitoring device according to claim 1, wherein the discharge monitoring device is arranged in the vicinity of the discharge electrode and is configured to monitor the operation of the lightning arrester by detecting discharge light of a series discharge gap. 6. The arc gap of the transmission line side is the discharge gap.
And a fluorescent discharge collector disposed between the tower side arcing horn and the tower side arcing horn to monitor the operation of the pair of arcing horns. The discharge monitoring device according to claim 1, wherein 7. A discharge gap is a minute gap formed between a lightning rod grounded to impedance ground and a steel tower, and a fluorescent discharge collector is arranged in the vicinity of the minute gap to monitor lightning discharge to the steel tower. The discharge monitoring apparatus according to claim 1, wherein the discharge monitoring apparatus is formed so as to have the following structure. 8. A fluorescent output of a fluorescent discharge collector arranged at a plurality of positions on a steel tower is converged by an optical coupler into a single optical fiber and transmitted to a monitoring place. The discharge monitoring device according to claim 1.