JP2001023479A - Lightning surge detecting device and switch equipped with the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightning surge detecting device capable of detecting the degree of degradation of a switch resulting from lightening. SOLUTION: An abnormal voltage resulting from lightening to a power supply side power line 111 (or load side power line 112) where a switch 100 is connected, is droped with an arrester 1, and sensed with a voltage detecting part 2, and on the basis of the obtained voltage value, the frequency of lightening is cumulated by a frequency cumulating part 3, which can detect the degree of degradation of the switch 100 due to lightening.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightning surge detecting device for detecting a lightning strike on a switch, and more particularly to a lightning surge detecting device capable of judging the degree of deterioration of the switch based on a value obtained by detecting a lightning strike. .

[0002]

2. Description of the Related Art Conventionally, there is no lightning surge detecting device of this kind, and there is a related switch such as a built-in lightning arrester shown in FIG. FIG. 5 is a schematic configuration diagram of a switch with a built-in lightning arrester. In FIG. 1, a switch with a built-in lightning arrester has a lightning arrester 1 built in a switch 100, and the lightning arrester 1 causes a power supply side distribution line 1 to be a main circuit of the switch 100
11 or the abnormal voltage due to the induced lightning applied to the load side distribution line 112 is dropped to the ground GND via the case 101.
It discharges to the side. The arrester 1 includes a varistor element 12 and a discharge gap 11 that are grounded in series.

In a steady state where there is no lightning strike, no voltage is applied to the varistor element 12 because it is always insulated by the discharge gap 11. On the other hand, when a lightning surge voltage occurs due to a lightning strike, an abnormal current is discharged through the discharge gap 11 to flow through the varistor element 12, and the abnormal voltage is attenuated and limited by the non-linear resistance characteristic of the varistor element 12. .

[0004] When a lightning surge on the insulator 102 occurs due to a lightning strike on the distribution line connected to the switch 100 in this way, an abnormal voltage due to the lightning strike causes the distribution lines 100 and 110 on the power supply side or the load side to break down. When applied to the main circuit, the surge arrester 1 attenuates the voltage level of the abnormal voltage, and discharges the attenuated abnormal voltage to the ground side.

[0005]

Since the conventional switch with a built-in lightning arrester is configured as described above, it is possible to attenuate an abnormal voltage generated by a lightning strike and discharge it to the ground GND side. The degree of impact on the switch 100 due to lightning is determined, and the switch 10
There is a problem that the degree of deterioration of 0 cannot be detected.

In particular, since it is extremely difficult to detect how much the switch 100 has deteriorated due to a plurality of lightning strikes, it is necessary to know until a failure such as the switch 100 suddenly stops functioning. However, there is a possibility that the faulty switch 100 may cause a spillover accident to the entire distribution line. The present invention has been made in order to solve the above-described problem, and has as its object to provide a lightning surge detection device capable of detecting the degree of deterioration of a switch due to a lightning strike.

[0007]

According to the present invention, there is provided a lightning surge detecting device for detecting a lightning strike on a distribution line to which a switch is connected, wherein the lightning arrester reduces an abnormal voltage generated by the lightning strike. And a voltage detection unit that detects the voltage value of the abnormal voltage, and a frequency integration unit that compares the detected voltage value with a preset voltage and integrates the number of lightning strikes based on the comparison result. It is provided with. As described above, in the present invention, the abnormal voltage due to the lightning strike on the distribution line to which the switch is connected is reduced by the lightning arrester, and the abnormal voltage is detected by the abnormal voltage detection unit, and the lightning strike is performed based on the detected voltage value. By accumulating the number of times by the number accumulating unit, it is possible to detect the degree of deterioration of the switch due to lightning strike.

Further, the lightning surge detecting device according to the present invention is provided with a deterioration analogizing section for analogizing the degree of deterioration of the switch based on the integration result of the number integrating section, if necessary.
As described above, in the present invention, since the degradation analogy unit estimates the degree of switch degradation based on the result of integrating the number of lightning strikes, the switch that has been degraded due to lightning strike is detected and replaced beforehand. Can prevent the spillover accident.

Further, in the lightning surge detection device according to the present invention, the voltage detection unit detects the voltage value of the abnormal voltage based on the light that discharges the abnormal voltage in the gap of the surge arrester, if necessary. As described above, in the present invention, the voltage detection unit detects the voltage value of the abnormal voltage from the light emission due to the discharge generated in the gap of the lightning arrester, thereby reliably detecting the abnormal voltage and detecting the degree of deterioration of the switch. Can be.

Further, the lightning surge detection device according to the present invention integrates, as necessary, a value weighted in a plurality of stages by the frequency integration unit as the number of lightning strikes. As described above, in the present invention, since the number accumulating unit accumulates a value weighted in a plurality of stages according to the magnitude of the abnormal voltage as the number of lightning strikes, the degree of impact received by the switch due to the magnitude of the lightning strike is considered. The degree of deterioration of the switch can be detected.

Further, in the lightning surge detecting device according to the present invention, the number-of-times accumulating section sets a plurality of set voltages as necessary, and integrates the number of lightning strikes for each comparison result of the plurality of set voltages. As described above, in the present invention, a plurality of set voltages and abnormal voltages are compared, and the number of lightning strikes for each comparison result is accumulated by the number accumulating unit, so that the magnitude of the lightning strike is divided into a plurality of stages. To detect and judge the degree of deterioration of the switch.

Further, the lightning surge detecting device according to the present invention is provided with communication means for transmitting at least one of a voltage value of an abnormal voltage, a cumulative number of lightning strikes, or a degree of deterioration estimated as necessary. is there. As described above, in the present invention, various information related to lightning is detected or analogized and transmitted via communication means. Even in a place away from the site, it is possible to immediately grasp and analyze, and it is easy to judge the replacement time at an early stage.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment of the Present Invention) Hereinafter, a lightning surge detector according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2A. FIG. 1 is an overall block configuration diagram according to the present embodiment, and FIG. 2A is a detailed circuit block diagram of a circuit integration unit in the lightning surge detection device shown in FIG.

In each of the drawings, the lightning surge detection device according to the present embodiment is an abnormality caused by a lightning strike applied to the load side distribution line 112 (or the power supply side distribution line 111) of the main circuit introduced into the switch. A lightning arrester 1 for lowering a voltage, a voltage detector 2 for detecting a voltage value of the abnormal voltage, and comparing the detected voltage value with a preset voltage, and based on the comparison result, the number of lightning strikes And a degradation estimating unit 4 for estimating the degree of degradation of the switch based on the integration result of the number integrating unit 3.

The arrester 1 is constructed by connecting a varistor element 12 and a discharge gap 11 in series, as in the case of the prior art. The voltage detection unit 2 includes one or more photoelectric conversion units 21 that receive light that emits light due to discharge of an abnormal voltage in the discharge gap 11 of the switch. The electric signal converted by the photoelectric conversion unit 21 is provided. Is output to the number-of-times integrating unit 3.

The number-of-times accumulating section 3 includes an amplifier 31 for amplifying the voltage value of the abnormal voltage detected by the voltage detecting section 2 at a predetermined amplification factor, and a comparator 32 for comparing the amplified voltage value with a set voltage. A set voltage memory 33 for setting and storing the set voltage in advance; a counter 34 for integrating the number of lightning strikes based on the comparison result of the comparator 32; and outputting the comparison result to a control unit (not shown). And an output relay 35.

Next, the operation of this embodiment based on the above configuration will be described. First, when a lightning surge voltage is generated in a bushing of a switch due to induced lightning of a distribution line, an abnormal voltage is superimposed on a load (or power supply) side distribution line 112 (or 111) which is a main circuit of the switch. Applied. This abnormal voltage is discharged in the discharge gap 11 of the surge arrester 1,
The voltage generated by this discharge is reduced by the varistor element 12 and is conducted to the ground side.

The arc emitted by the discharge of the discharge gap 11 is received by the photoelectric converter 21 of the voltage detector 2 and converted into an electric signal to output a voltage corresponding to the degree of the arc. This output voltage is input to the comparator 32. The comparator 32 reads the set voltage from the set voltage memory 33 and compares it with the output voltage. If the output voltage is equal to or higher than the set voltage, there is a lightning strike. Output as

The output of the comparator 32 is integrated by a counter 34 and output to the deterioration estimating unit 4. This degradation analogy unit 4
The degree of switch deterioration is determined based on the contents of the integrated output, and a communication line, telephone line, or PHS is sent to the monitor or monitoring center.
And the like.

(Second Embodiment of the Present Invention) FIG. 2B is a detailed block circuit diagram of a number accumulating unit in a lightning surge detector according to a second embodiment of the present invention. In the figure, the lightning surge detection device according to the second embodiment is the same as that shown in FIG.
, A lightning arrester 1, a voltage detector 2, a number accumulator 30 (corresponding to 3 in FIGS. 1 and 2A), and a deterioration analogy estimator 4 in common. Part 3
This is a configuration in which the circuit configuration of 0 is different.

The number accumulating section 30 stores a plurality of set voltages in the set voltage memory 33 in addition to the amplifier 31, the comparator 32, the set voltage memory 33, and the counter 34, and according to the comparison result of the comparator 32. The weighting unit 36 weights the number of lightning strikes. Next, the operation of the lightning surge detection device according to the present embodiment based on the above configuration will be described. As in the above-described embodiment, the abnormal voltage due to the lightning strike causes the load-side (or power-side) distribution line 112 (or 1).
11), number-of-times accumulating unit 3 via lightning arrester 1 and voltage detecting unit 2
When the detection voltage is input to 0, the number-of-times accumulating section 30 amplifies the input detection voltage with the amplifier 31 and compares it with the comparator 32.
The comparator 32 reads a set voltage from a set voltage memory 33 storing a plurality of set voltages, compares the detected voltages, and outputs a comparison result corresponding to the plurality of set voltages.

The weighting section 36 weights the number of lightning strikes based on the comparison result corresponding to the plurality of set voltages and outputs the result. The weighting unit 36 assigns a large weighting value in the descending order of the plurality of setting voltages. For example, when the setting voltage is a value of five steps, the weighting values are in the descending order, such as 5.4.3.2.1. Become. The value of the weight may be an exponentially increasing numerical value such as 11.7.4.2.1. In other words, the larger the lightning strike, the more explosive the impact on the switch becomes, so that the apparent number of lightning strikes is increased.

As described above, the counter 34 outputs the number of lightning strikes weighted by the weighting section 36 to estimate the deterioration of the switch. In each of the above embodiments, the voltage detector 2 detects the abnormal voltage based on the arc in the discharge gap 11 of the lightning arrester 1. It is also possible to adopt a configuration in which an abnormal voltage is detected.

Also, as shown in FIG. 3, the electric signal from the photoelectric conversion unit 21 installed near the discharge gap 11 of the lightning arrester 1 disposed inside the switch 100 is disposed outside the switch 100. It can also be output from the signal output unit 22 to the detection device main body side. In this way, a signal is transmitted from the lightning surge detector to the manager or the monitoring center via the communication means 7 every time a lightning surge occurs or based on the content of the integrated output. As this communication means 7, a coded information signal such as a lightning surge level, the number of occurrences, and the date and time of occurrence is transmitted through a communication line or by using wireless communication such as a general telephone line or a PHS line. At the monitoring center, based on the received signal, the deterioration state of the lightning arrester 1 attached to the main body of the switch 100 or the built-in or external one can be grasped, and the data can be analyzed to determine the replacement time.

Further, as shown in FIG. 4, the detection device main body is housed and disposed in the case 101 of the switch 100, and a display unit 5 for notifying the number of lightning strikes detected by the detection device main body is provided. You can also. As described above, the number of lightning strikes to the switch 100 is individually displayed and visually recognized on the display unit 5, so that the degree of deterioration of each switch 100 can be determined.

Although the lightning surge detection device according to each of the above embodiments is configured to be attached to the switch 100 or to be built in the switch 100, the lightning surge detector is not attached to or built in to the switch 100, Or a monitoring center. That is, the switch 100 is provided with only the lightning arrester 1 and the sensor of the voltage detecting unit 2, and the voltage value of the abnormal voltage from this sensor can be transmitted to the manager or the management center side to detect the lightning surge. it can. In this case, the voltage value of the abnormal voltage sequentially transmitted from the plurality of switches 100 can be processed by a single administrator or the monitoring center.

[0027]

According to the present invention, an abnormal voltage caused by a lightning strike on a distribution line to which a switch is connected is reduced by a lightning arrester.
By detecting the abnormal voltage detector and accumulating the number of lightning strikes based on the detected voltage value by the number accumulator, it is possible to detect the degree of deterioration of the switch due to the lightning strike.

Further, the lightning surge detecting device according to the present invention is provided with a deterioration analogizing section for analogizing the degree of deterioration of the switch based on the integration result of the number integrating section, if necessary.
As described above, in the present invention, since the degradation analogy unit estimates the degree of switch degradation based on the result of integrating the number of lightning strikes, it is possible to detect and replace the switch deteriorated due to lightning strike beforehand. This has the effect of preventing spillover accidents.

Also, in the present invention, the voltage detector detects the voltage value of the abnormal voltage from the light emission due to the discharge generated in the gap of the lightning arrester, thereby reliably detecting the abnormal voltage and detecting the degree of deterioration of the switch. It has the effect that it can be done. Further, the lightning surge detection device according to the present invention integrates a value weighted in a plurality of stages by the number-of-times integration unit as the number of lightning strikes as necessary. As described above, in the present invention, since the number accumulating unit accumulates a value weighted in a plurality of stages according to the magnitude of the abnormal voltage as the number of lightning strikes, the degree of impact received by the switch due to the magnitude of the lightning strike is taken into consideration. This has the effect that the degree of deterioration of the switch can be detected.

In the present invention, a plurality of set voltages and abnormal voltages are compared, and the number of lightning strikes for each comparison result is accumulated by the number accumulating section. Thus, there is an effect that the degree of deterioration of the switch can be detected by detection. Furthermore, in the present invention, various information related to lightning is detected or analogized and transmitted via communication means, so that the occurrence of lightning surges and the deterioration of switches and arresters can be checked at the switch installation site. It is possible to immediately grasp and analyze even a place away from the place, and it is easy to judge the replacement time at an early stage.

[Brief description of the drawings]

FIG. 1 is an overall block configuration diagram of a lightning surge detection device according to a first embodiment of the present invention.

FIG. 2A is a detailed circuit block diagram of a circuit integration unit in the lightning surge detection device shown in FIG. (B) is a detailed block circuit diagram of the number accumulating unit in the lightning surge detection device according to the second embodiment of the present invention.

FIG. 3 is an overall schematic configuration diagram of a lightning surge detection device according to another embodiment of the present invention, in which a detection device main body is disposed outside a switch case.

FIG. 4 is an overall schematic configuration diagram in which a lightning surge detection device according to another embodiment of the present invention is housed in a switch and a display unit is added.

FIG. 5 is a schematic configuration diagram of a switch with a built-in lightning arrester.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 lightning arrester 2 voltage detection unit 3, 30 count integration unit 4 deterioration analogization unit 5 display unit 7 communication means 11 discharge gap 12 varistor element 21 photoelectric conversion unit 22 signal output unit 31 amplifier 32 comparator 33 setting voltage memory 34 counter 35 output relay 36 Weighting unit 100 Switch 101 Case 102 Insulator 111 Power distribution line 112 Load distribution line

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[Procedure amendment]

[Submission date] August 31, 2000 (2000.8.3)
1)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] Fig. 5

[Correction method] Change

[Correction contents]

FIG. 5

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tatsumi Ikeda 1-1, Odaikita-cho, Saga City, Saga Prefecture Togami Electric Manufacturing Co., Ltd. (72) Inventor Hitoshi Yamada 1-1, Oitakita-machi, Saga City, Saga Prefecture F-term in Togami Electric Co., Ltd. (reference) 2G035 AA16 AB11 AC01 AC13 AC16 AD23 AD26 AD28 AD29

Claims (7)

[Claims] 1. A lightning surge detection device for detecting a lightning strike on a distribution line to which a switch is connected, comprising: a lightning arrester for dropping an abnormal voltage generated by the lightning strike; and a voltage detector for detecting a voltage value of the abnormal voltage. A lightning surge detection device, comprising: a number integration unit that compares the detected voltage value with a preset voltage and integrates the number of lightning strikes based on the comparison result. 2. The lightning surge detection device according to claim 1, further comprising: a deterioration analogy estimation unit for estimating a degree of deterioration of the switch based on an integration result of the number integration unit. apparatus. 3. The lightning surge detection device according to claim 1, wherein the voltage detection unit detects a voltage value of the abnormal voltage based on light that discharges an abnormal voltage in a gap of the lightning arrester. Lightning surge detector. 4. The lightning surge detecting device according to claim 1, wherein a value weighted in a plurality of stages by the number integrating unit is integrated as a number of lightning strikes. . 5. The lightning surge detecting device according to claim 1, wherein the number accumulating unit sets a plurality of set voltages and accumulates the number of lightning strikes for each comparison result of the plurality of set voltages. A lightning surge detection device, characterized in that: 6. The lightning surge detection device according to claim 1, wherein at least one of a voltage value of the abnormal voltage, an integrated number of lightning strikes, and a degree of deterioration estimated is transmitted to a monitoring side. A lightning surge detection device comprising: 7. A switch provided with the lightning surge detection device according to any one of claims 1 to 6.