KR101509088B1 - System for detecting cable failure place in - Google Patents

Abstract

The present invention relates to a transmission and distribution line fault point detection system. In the various accidents that occur in a processing power lines, when fault currents caused by ground faults in a tower and surge current due to the falling of a thunderbolt flow through the transmission processing Line and pylons, information is detected through a current transformer installed on one of tower legs of four tower legs of each transmission pylon. The data formation by the detected information is collected in one of the center apparatus by a relay transmission of the short-range wireless communication module, the communication program installed in each internal detection terminal, usually by comparing the data collected by the individual towers with a computer program that analyzes provided by air as well as a fault indicator and a fault point display means to accurately determine the point or points of failure lightning accident and perform a fault point display function to allow a user to easily find the accident point, thereby, promptly dealing with the fault point and helping the safe operation of the aircraft.

Description

Technical Field [0001] The present invention relates to a system for detecting a failure in a transmission /

[0001] The present invention relates to a system for detecting a fault in a transmission and distribution line in a transmission and distribution field, and more particularly, to a system for detecting a faulty point of a processed transmission and distribution line, And in case of an accident, a field worker can easily detect an accident point with the naked eye and take measures against an accident.

The electric power generated from the power plant is transmitted through the transmission line through the substation. The final transformer is installed in the vicinity of the customer, and the electricity is supplied to the customer through the processing line.

The processing transmission line is located between the power plant and the power distribution substation and serves as a kind of path for transporting the power generated by the power generation plant. Unlike the distribution line, it transmits a large amount of power. Therefore, when the failure occurs, Very large.

However, it is difficult to make the situation more difficult because the overhead transmission line passes mostly through the mountainous area. Therefore, when a fault occurs, it takes a lot of manpower and time to find the fault, .

In addition, since the processing power distribution line is a line that supplies power for each small power from the power distribution transformer, it is very complicated according to the distribution of the customer, and thus, depending on the failure point, there is a problem in supplying power to a large number of customers.

In some cases, it may take more manpower and time to find out the cause and to identify the cause than to the manpower and time required for the accident recovery work on the transmission line and the processing power line.

Therefore, there is a need for a technology for detecting a fault in a processed transmission line and a faulty transmission line that can detect a failure point to a transmission line and a processing distribution line from a remote place in real time.

According to this demand, the technology to date has not escaped a very primitive method because the correction percentage (%) of the zone-1, zone-2, zone-3 elements of the short- or ground- And whether there is a carrier trip operation of the switchgear and whether it is within 15% of the transmission and distribution line in the substation or within 15% of the substation in the opposite substation or in the middle part of both substations. % Of the distance, and the line is checked instantaneously in that area.

This discrimination method is based on the assumption that the error of the protective relay is within the allowable value and the protective relay is operated correctly.

In recent years, it has become possible to detect more advanced fault points on transmission and distribution lines using digital distance relays, and it is also possible to estimate the lightning point by operation of the lightning system installed at the local power supply station of the power company.

However, even though these facilities are very expensive facilities, they are not able to give accurate fault points.

As a conventional prior art, Korean Utility Model Registration No. 20-0201727 (registered on Mar. 23, 2000) "Lightning Display Device" (hereinafter referred to as "Prior Art 1") is known.

In the prior art 1, when a fault occurs due to a lightning stroke, the display cloth is unfolded so that the transmission tower with lightning can be easily found at a remote place. However, in actual application of the above-described prior art 1, five or six power transmission towers simultaneously operate at one lightning lap time, so that even if a pylon with a lightning stroke is found, the fault checking range becomes wider and eventually, Is required.

Also, as a conventional prior art, the United States of America, JOSLYN, FISHER PIERCE, POWER DELIVERY PRODUCT INC., EDISON CONTROLS PCI INC. However, in the case of collecting information remotely, it is necessary to use the remote communication means of the communication company. In the case of using the short distance wireless communication, the data should be collected by the handheld receiver while the site is being instantaneously There is a problem that requires a lot of manpower and time.

In Japan, Nippon Kouatsu Electric Co. Ltd.'s Fault Locating System is the most advanced technology. However, this system also uses Mobile Phone Module for reception through GPS antenna and data transmission for synchronizing fault detection, Handheld Since a vehicle or aircraft equipped with a receiver needs to collect data in a moment of an accident area, there are uneconomical problems in actual application in the field.

Therefore, when the surge current or fault current flows through the transmission tower and the processing branch line due to the lightning accident and the accident in the steel tower among the accidents occurring in the transmission and distribution line, or when the surge voltage is applied to the transmission tower and the processing branch line, The detector detects and measures the current value or the magnitude of the abnormal voltage flowing through each transmission tower and collects the detected data into one center device by relay transmission of the built-in short range wireless communication module for each detection terminal, It is necessary to develop a technology that can accurately discriminate a lightning point or a fault point by comparing and analyzing data with a computer program.

As a conventional prior art, there is known a lightning point and a fault point detection system (hereinafter, referred to as " Prior Art 2 ") on a transmission power transmission line of Korean Patent Registration No. 10-0547967 have.

The prior art 2 is a system for detecting a lightning point and a fault point in a transmission line that can accurately discriminate a lightning point or a fault point by comparing and analyzing data of individual steel towers collected through detecting terminals with a computer program. A level detector for setting a reference value immediately below the saturation point and for measuring a duration which is a starting point where the instantaneous value of the input surge waveform goes up to the peak value from the point at which the instantaneous value reaches the reference value, And a maximum value detection means for detecting the magnitude of the lightning current waveform by using the fact that the magnitude of the duration time and the size of the surge waveform are proportional to each other, wherein the magnitude of the lightning current waveform passing through each steel tower detected by the maximum value detection means , And the steel tower with the largest waveform was detected as a steel tower nearest to the lightning strike point. It is characterized in that.

However, in the prior art 2, it is said that failure information on the transmission line can be collected in real-time by a computer for management or an Internet web server, and the collected data can be utilized to accurately determine a failure point. However, It is difficult for the field worker to find the fault point easily with the naked eye.

Therefore, it is necessary to develop a technology that enables the field worker to easily detect and correct the transmission tower, while accurately detecting the fault point of the transmission / distribution line.

Registered Utility Model No. 20-0201727 (Registered on Mar. 23, 2000) "Lightning Display Device" Korea Registered Patent No. 10-0547967 (Registered on Mar. 24, 2006) "Lightning Point and Fault Point Detection System in Overhead Transmission Line"

Accordingly, it is an object of the present invention to provide a method and apparatus for accurately detecting a failure point of a processed transmission / distribution line, performing an airblock display function on an aircraft during an unstable situation, And to provide a system for detecting a failure of a transmission / distribution line that can be easily detected and arranged for an accident.

In order to achieve the above object, according to the present invention, when a surge current due to a lightning strike and a fault current due to a ground fault in a steel tower flow through a wire and a power transmission tower among various accidents occurring in the transmission line, The information is detected through a current transformer installed in one main station among the four main substations of each transmission tower and the detected information is converted into data and converted into a single one by the relay communication program of the short- The collected data is collected by the center device. The data of the individual pylons collected are compared with a computer program so that the lightning spot or the fault point can be accurately discriminated. In addition, in case of an accident, , The fault point indicator And to provide a fault detection system for a transmission / distribution line fault line that enables safe operation of an aircraft and quick response to a fault point.

According to the fault detection point detection system of the present invention, when a surge current caused by a lightning strike and a fault current due to a ground fault in a steel tower flow through the ground wire and the transmission tower, The information is detected through a current transformer installed in one main station among the four main substations of the transmission tower, and the detected information is converted into data, and a single center The collected data is collected and analyzed by a computer program to analyze the data of the individual steel towers. By using the computer program, it is possible to accurately identify the lightning spot or the fault point. In addition, It executes the function of displaying the air fault and, in case of an accident, So that it can do the breakdown point display function so you can easily find with the naked eye is made possible by the prompt action of the safe operation of the aircraft, and points of failure.

1 to 12 show a preferred embodiment of a fault detection point detection system for a transmission / distribution line according to the present invention,
FIG. 1 is a diagram showing a flow of a lightning stroke current or a fault current when a lightning strike occurs on a ground line of a working transmission line or a ground fault occurs in a transmission tower;
2 is a diagram showing an IEC brain standard waveform,
FIG. 3 is a view showing waveforms of respective lightning currents flowing through one main substation of the transmission tower and the adjacent transmission tower when the lightning current is applied to one transmission tower of the transmission tower. FIG.
FIG. 4 is a chart showing a square wave output from a level detector of a fault detection transceiver installed in a transmission tower and an adjacent transmission tower when a lightning stroke current flows in one transmission tower of the transmission tower,
FIG. 5 is a bar graph showing the magnitude of the lightning discharge current value detected by each power transmission pylon between transmission towers adjacent to both sides of the transmission tower when there is a lightning storm in one transmission tower of the transmission tower,
6 is an electronic circuit block diagram of a fault detection transceiver,
7 is a view showing the installation state of the current transformer and the fault detection transceiver,
Figs. 8 to 12 show the airblock display and the failure point display means,
8 is a view showing the installation state of the airblock display and the failure point display means,
9 is a perspective view of an airbag display and a failure point display means,
10 is an exploded perspective view of the airblock display and the failure point display means,
11 is a front view showing the state of the airblock display,
FIG. 12 is a front view showing a failure point display state, FIG.

The faulty transmission line detection system according to the present embodiment comprises a transmission line and a transmission line conductor installed between the substation and the substation and having a length of several kilometers to several tens of kilometers. In addition, the standard span is supported by a transmission tower every 300m, and the conductor is supported apart from the transmission towers by an insulator. In order to lightning the lightning, Lt; / RTI > In addition, there is no insulation between the ground wire and the transmission tower, so that the ground wire is directly grounded for each transmission tower.

Korea's transmission system uses three-phase three-wire system regardless of voltage type. Therefore, when one conductor is used regardless of whether it is a single conductor or multiple conductors, three conductors are one transmission line. Therefore, when it is difficult to secure the construction site of the transmission line as it is today, it is natural that a transmission line of a plurality of lines is installed in one transmission tower.

Even if several lines are installed on one transmission tower, this "Fault Point Detection System on the Transmission Line" accurately displays the fault span on the transmission tower path and shows the transmission tower path with a large number of transmission lines It is possible to determine which line is broken by analyzing the operation state of the relay or the breaker of the both ends of the substation. Here, the term "transmission tower" is a term distinguished from a transmission line. That is, when the transmission tower is used as a support for the transmission line, it can be used not only for one transmission line but also for other transmission lines. And two or more transmission lines starting together at the starting point of a transmission tower may be divided into different paths in the middle. Therefore, a group of transmission towers connected by one branch line is regarded as one transmission tower path.

The fault detection point detection system of the present invention comprises: a failure detection transceiver (FDT) installed in every transmission tower and detecting an abnormal current flowing through the transmission tower, transmitting data to a center device or performing relay transmission between terminals; Fault Detector Transceiver)

A central communication unit (CCU) for transmitting data to the fault detection transceiver, receiving data from the fault detection transceiver, and transmitting the received data to a PC or a Web Server PC,

A PC or a Web server PC that processes data received from the center device, and a management program.

However, since PC or Web server PC is generalized, the description is omitted here and only the configuration of the management program is described.

In the fault locating system of Japan, synchronization is obtained by reception of the clock through the GPS antenna, since each transmission tower is detected at the same time and the values thereof are compared with each other when the fault is detected. Since the level detector operates within 2 ㎛ of the rising or falling edge of the sudden waveform that occurs when a lightning strike or ground fault occurs, the data detected by each transmission tower is automatically synchronized. Therefore, the synchronization-related device is omitted.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a faulty transmission line detection system according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an exemplary view showing a flow of a lightning stroke current or a fault current in a case where a lightning stroke has occurred in a ground line of a transmission line or a ground fault has occurred in a transmission tower.

In this example, one power transmission tower is composed of 60 power transmission towers, and serial numbers from 1 to 60 are assigned to the 60 power towers. In case of a lightning strike near the pylon of transmission line No. 30 or a ground fault in the transmission pylon, the flow of the lightning current or fault current discharged through the pylon and each transmission pylon is shown from No. 27 to No. 33 .

As shown in the illustration, the largest discharge current flows through the No. 30 transmission tower, followed by the No. 29 and No. 31 transmission towers, the No. 28 and No. 32 transmission towers, and the No. 27 and No. 33 transmissions The size of the discharge current decreases in the order of the steel tower. That is, it can be said that the discharge current becomes smaller as the distance from the ground fault point increases.

2A is a diagram showing an IEC brain standard waveform.

Generally, the waveform of the brain voltage or the brain current is an impulse wave as shown in FIG. 2A. Shockwave is also called surge, which has a waveform that reaches its peak value in a very short time and disappears in a very short time. In the drawing, point A is pierced, point OA is wave head, and AB is wave tail. Shockwave is usually expressed by wave height, wave length and wave length.

However, since the waveform of the wave portion is actually distorted, the point at which a straight line connecting 90% of the peak value with 10% of the peak value (30% in the case of voltage) crosses the time axis is referred to as a reference point of time (This is called the "zero point of agreement"), and the time from when the upper curve passes through point A, that is, Th in the drawing, is called the fuzz length. The length of the filimy is the time from the reference point to a point that is half the peak value, that is, Tt in the figure is the filament length.

Therefore, if the wave is 100 kV and 1.2 x 50 μs, the wave height is 100 kV, the filament length is 10 to 100 μs, and the filament length is 50 μs.

However, the actual value of the EEG type is known to be in the range of tens of thousands to 200,000 A, the ripple length of 1 to 10 μs, and the filament length of 10 to 100 μs.

However, the fault current that we have to deal with here is quite different from the EEG type. In other words, it belongs to the commercial frequency, and the period of 1Hz is 16,700 μs, which lasts for a long time compared to the EEG type. Therefore, waveforms of EEG and fault currents can be easily distinguished.

FIG. 2B is a graph showing the waveforms of the respective lightning currents flowing in one main part of the transmission towers 30, 29, 28 and 27 when a lightning current of 100 kA is applied to the transmission towers 30 in FIG.

In Fig. 1, the current discharged through each transmission tower is estimated to be 40 kA, 30 kA, and 30 kA, respectively. do.

Next, the 30 kA that reached the 29th transmission tower or the 31st transmission tower was discharged through the 29th transmission tower or the 31st transmission tower, and the remaining 12kA would flow back to the 28th or 32th transmission tower. The above-mentioned classification method is repeated.

When the thunderstroke discharge current of the 30th transmission tower is detected by these estimated values, it will be divided equally into four main substations of transmission tower and 10kA will flow in one substation.

In the 29th or 31st transmission towers, 4.5kA, which is one quarter of 18kA, flows through one tower. In the 28th or 32th transmission towers, 1.8kA .

When a current transformer is used to detect the magnitude of such a lightning stroke reversal current, the saturation point of the current transformer must be as high as several kA, and it is impossible to install such a current transformer in each transmission tower. Therefore, it is possible to use a method of inserting pores in the iron core of the current transformer to increase the saturation point even in a small area of the magnetic path. It is assumed here that a 3kA current transformer is used.

Therefore, FIG. 2B shows a state in which the waveforms of the lightning discharge currents discharged through the main station of the power transmission towers gradually distant from the nearest transmission tower and the lightning arrest point of the lightning strike point are gradually decreasing. Also, And the saturation point duration of the lightning discharge current waveform.

That is, the lightning discharge current waveform discharged through the nearest transmission tower (the transmission tower 30 in FIG. 1 in the case of FIG. 1) of the lightning strike point is the waveform of (1), and the transmission tower next to the right and left The waveform of the thunderstroke discharge current discharged through the power transmission tower of No. 31) is the waveform of ②, and the waveform of the thunderstroke discharge current discharged through the transmission tower adjacent to the right and left (in the case of FIG. 1, No. 28 or No. 32 transmission tower) , And the waveform of the lightning discharge discharge current discharged through the transmission tower adjacent to the right and left (the case No. 27 or No. 33 transmission tower in the case of Fig. 1) is the waveform of the waveform ④.

(A'-a) μs, T2 (b'-b) μs, T3 (c'-c), and T4 (d'-d) μs in the drawing . By measuring the saturation duration, it is possible to invert the peak point existing above the saturation point which can not be measured.

FIG. 3 shows a time chart of a square wave output from a level detector of a fault detection / transmission / reception device installed in a transmission tower No. 30, No. 29, No. 28, or No. 27 in the case of a lightning current flowing in the example of FIG. Fig. In Fig. 3, the level detector is turned on when the level is higher than the set value, and turned off when the level is lower than the set value. Therefore, the point a in Fig. 2B is 1 μs, the point b is 2 μs, the point c is 3, the point d is 4 μs, the point a 'is 55 μs, the point b' Assuming that the point is 30 μs, since the time chart as shown in the drawing is drawn, T1 generates one square wave having a duration of 69 (70-1) μs, and T2 has a duration of 53 (55-2) μs T3 generates one square wave having a duration of 42 (45-3) 占 퐏, and T4 generates one square wave having a duration of 26 (30-4) 占 퐏 .

FIG. 4 is a bar graph showing the magnitudes of the discharge current values detected by the respective transmission towers between No. 24 and No. 36 transmission towers when there is a lightning strike or a ground fault in the transmission towers of No. 30 as shown in the example of FIG. Fig. These graphs are assuming that the ground resistance and transient ground resistance of each transmission tower are uniform. In practice, however, there is a difference between ground resistance and transient ground resistance depending on the soil and construction conditions of each transmission tower. Therefore, the bar graph in FIG. 4 may be difficult to judge.

Therefore, in order to output a bar graph that can induce accurate judgment, the ground resistance and transient ground resistance of each transmission tower are input to the management program and the relation of the current value in inverse proportion to the resistance value (Ohm's law) And then compared and analyzed. This calibration process can be inserted at any time in the production of a computer management program. The ground resistance value and the excessive ground resistance value input to the program are input when the transmission line construction is completed, and then the ground resistance and the transient ground resistance value measured periodically are updated . In the existing transmission line, always input or update the latest measurement data so that the bar graph of the same type and the same shape can be displayed so that the accurate lightning point or fault point can be determined.

5 is an electronic circuit block diagram of the failure detection transceiver. When a lightning stroke current flows into the transmission tower from the working branch line 22 of the transmission line, or when a fault current flows into the transmission tower from the transmission line conductor, the electricity is discharged through the four transmission tower towers 21, The lightning stroke current and the fault current are detected through the current transformer 23 provided in the main body 21.

However, since a current transformer usually used does not have a high saturation point, the instantaneous value of the large current can not be detected as it is. Therefore, a current transformer which increases a saturation point by inserting a gap into a part of a closed-loop iron core used as a magnetic path of a current transformer is used. For detection of an instantaneous value higher than the saturation point of the current transformer inserted with the void, ) Is used. That is, if any value below the current saturated point of the current transformer is set, the instantaneous value input is turned on when the set value reaches the set value, and turned off when the value falls below the set value. Continuous "is measured, and the time is inverted to obtain the instantaneous value above the saturation point. And the maximum value detector 25 detects the maximum instantaneous value when the value indicates a value less than the set value of the level detector 24. [ In this case, it is possible to use a high-speed sampling IC (Smapling IC) or a holding IC (Holding IC).

Further, a surge / fixed current discriminator 26 is provided which is capable of discriminating whether the detected waveform is a surge waveform or a fault current waveform. This discriminator can be easily discriminated by a combination of a coil and a capacitor which exhibit different impedance values for a surge waveform and a used frequency waveform. Also, there is a method of sampling a sample every 50 μs, The surge waveform can be sampled only once or twice, except for the same value repeated near zero, and the waveform of the commercial frequency can be sampled at any value which is always changing except for the same repeated value close to zero Can be sampled 334 times. Using these methods makes it easy to distinguish.

As described above, the level detector 24 outputs a duration longer than the set value and inputs it to the CPU 27. The maximum value detector 24 detects the maximum value and inputs the maximum value to the CPU 27, / Fault current discriminator 26 divides the surge waveform and the commutation frequency waveform and inputs them to the cube 27. The cube 27 stores these signals, calculates and data the signals, and outputs the data to the Dip Switch 29 To the center device via the RF module (28) together with its own identification number by the RF module (28). In addition, the RF module 28 receives and transmits signals transmitted from neighboring terminals, thereby enabling data transmission to a location far exceeding the communication distance through the multi-stage relay transmission. In other words, these various communication programs are embedded in the sight oil 27.

And the power supply to be supplied to the fault detection transceiver may be used in various ways. A method of using a solar cell as a power source, a method of using wind power using wind, and the like can be suggested as a method of frequently replacing a battery and a method of using a leakage current flowing through a ground wire as a power source by using a current transformer. Either way, the use of a chargeable and dischargeable battery is essential.

6 is an exemplary view showing the mounting state of the current transformer and the fault detection transceiver. That is, the current transformer is installed at the main part and the auxiliary part, which are located below the lowermost arm, so that one-fourth of the electric current passing through the entire transmission tower is caused to flow. In particular, the current transformer can be assembled on site by constructing a split type core, so that the transformer can be installed without disassembling, deforming or damaging the main material of the transmission tower. And, it can be used as data that can compare the data obtained from individual current transformers because the overcurrent intensity is high and the characteristics are good and uniform. The fault detection transceiver is preferably located near the current transformer and in a position where it can best communicate with the fault detection transceiver of nearby transmission towers.

As described above, when data of the lightning current or the fault current is transmitted in the fault detection transceiver, the center device receives the data through the RF module, inputs the received data to the CPU, and transmits the data to the PC or server PC . Also, the CPU of the center device incorporates a communication program to send a command signal to the slave terminals and receive data from the slave terminals.

As described above, the faulty transmission line detection system of the present invention collects fault information generated in the transmission line passing through mountains or harsh mountainous areas in real time in a management computer or an Internet web server, By accurately determining and displaying the point, it is possible to search not only the manager in charge but also the related department's PC, PDA, mobile phone, etc., so that it can instantly recognize the fault point in case of trouble in the transmission line, It is possible to implement a stable transmission system operation through the communication network.

In the mean time, the faulty transmission line detection system of the present invention further includes an airbreak indication and fault point indication means 100 installed on the transmission tower to visually indicate the airbreak indication and the failure point.

In the following description, a bolt through hole through which various bolts are passed and a bolt fastening hole through which various bolts are fastened are shown in the figure, but the reference numerals and detailed explanations thereof are omitted.

The air obstacle indication and fault point display means 100 can be installed on the spire portion and the arm of the transmission tower T and illustrate an example of the air fault indication and fault point display means 100 installed on the arm A.

The airborne fault indication and fault point display means (100) comprises a fixed table (110) fixed to the transmission tower (T); An aerial failure indicator 120 fixed to the upper surface of the fixing table 110; A pair of variable table plates 130 rotatably installed at both ends of the fixing table 110; A linear actuator 140 mounted on the fixing table 110 to rotate the variable plate 130 in an airbag display state; And a elastic spring 150 installed on the linear actuator 140 to elastically rotate the variable plate 130 in a fixed point display state.

The fixing table 110 is fixed to the arm A of the transmission tower T by bolts and nuts and may be fixed by a separate bolt and nut. The fixing base 110 may be fixed by using bolts.

The air disturbance indicator 120 includes a support 121 fixed to the upper portion of the fixing table 110, a socket 122 provided at an upper end of the support 121, And a bulb 123 for protecting a lamp (not shown) coupled and housed therein.

A mounting flange 124 is formed at the lower end of the support 121 and can be fixed to the fixing table 110 by a bolt passing through the mounting flange 124 and a nut fastened to the mounting flange 124.

The socket 122 is a conventional socket which is mechanically coupled and electrically connected to a lamp (not shown), so that detailed illustration and description thereof will be omitted.

The bulb 123 may be a conventional lamp protection bulb used to protect the lamp housed therein and may use a transparent bulb or a colored bulb such as red. Is preferably used.

When the fixing bar 110 is fixed to the power transmission towers T and the air fault indicator 120 is installed on the fixing table 110, the mounting flange 124 of the air fault indicator 120, A plurality of fixing bolts 112 are passed through the fixing table 110 and the nuts 113 and 114 fastened to the fixing bolts 112 are brought into close contact with the upper surface of the fixing table 110, And the nuts 115 and 116 fastened to the fixing bolt 112 are brought into close contact with the upper surface and the lower surface of the mounting flange 124 of the air disturbance indicator lamp 120, It is preferable that the back 120 is fixed to the fixing table 110 through a fixing bolt 112. [

The lower end of the fixing bolt 112 is passed through the arm A of the power transmission towers T and the nut 117 is tightened to come into close contact with the lower surface of the arm A, (120) can be installed on the arm (A) of the transmission tower (T).

The hinge pieces 111 may be formed on both sides of the upper surface of the fixing table 110 and the hinge pieces 110 may be formed on the lower surface of the inner surface of the variable table 130, The hinge pieces 131 and the hinge pieces 131 can be connected to the hinge pins 131 by the hinge pins 131. [

It is preferable to use a semi-transparent member having a red color as a whole, and it is preferable to use a synthetic resin material rather than a glass material to secure the variable plate 130 from strong winds, thunderstorms, and hail.

The linear actuator 140 may include a hydraulic cylinder or a pneumatic cylinder. The linear actuator 140 may include a driving nut and a driving screw threadably coupled to the driving nut and the driving nut. The linear actuator 140 may include an electric motor, In the case of using a pneumatic cylinder, since these structures are enlarged, it is preferable to use a solenoid so that the structure is simple and compact.

The linear actuator 140 includes a linear actuator body 141 and a movable rod 142 that linearly reciprocates by the linear actuator body 141.

The linear actuator 140 uses a type in which the movable rod 142 is retracted when power is applied and the movable rod 142 is kept free when power is not applied.

A hinge connection part 143 is formed on the distal end of the movable rod 142 and a hinge connection part 133 corresponding to the hinge connection part 143 is formed on the inner side surface of the variable plate 130, And the hinge connection portion 133 can be connected by the hinge pin 134.

The hinge connection part 133 formed on the variable plate 130 is positioned above the hinge piece 111 and the hinge piece 131 for hinging the lower end of the fixed plate 110 and the variable plate 130, It is preferable that the movable plate 142 of the actuator 140 linearly reciprocates so that the variable plate 130 can rotate between the airbag display state and the failure point display state.

When mounting the linear actuator 140 to the fixing table 110, the mounting bolt 46 may be fastened to the fixing table 110 through the base 145 formed in the linear actuator body 141.

The elastic spring 150 advances the movable rod 142 by an elastic force when the power of the linear actuator 140 is cut off. The elastic spring 140 moves the linear actuator 140 between the linear actuator body 141 and the hinge connection part 143, Coil springs can be used.

The power source required for the linear actuator 140 may be a power source for the battery for supplying the fault detection transceiver.

Also, a linear actuator driver 30 controlled by the cube 27 of the fault detection transceiver is provided to control the linear actuator 140 (see FIG. 6).

When the faulty point is determined by the fault detection transceiver, the cuspidor 27 applies power to the linear actuator 140 of the fault indication and fault point display means 100 installed on the transmission tower (T) of the fault point .

Power is supplied to the linear actuator 140 by the linear actuator driving unit 30 controlled by the cube oil 27 in a normal state when a failure point is not detected by the failure detection transceiver and thus the movable rod 142 is retracted The hinge pins 131 and 132 and the hinge pins 133 and 143 and the hinge pin 144 and the movable bar 142 constitute the fixing table 110 and the variable plate 130, The both-side variable plate 130 is held vertically by the working principle of the structure (see Fig. 11).

In the state where the variable plate 130 is held vertically, the light of the air obstacle indicator 120 illuminates the variable plate 130 to display the air barrier to the airplane.

The power to the linear actuator 140 is cut off by the linear actuator driving unit 30 controlled by the cube 27 so that the movable rod 142 is rotated And remains free.

At this time, since the movable rod 142 is elastically supported in the advancing direction by the elastic spring 150 provided between the linear actuator body 141 and the hinge connecting portion 143, the movable rod 142 is moved forward while the hinge connecting portion 143 The hinge pin 133 is pushed outward by the hinge pin 144 and the hinge pins 111 and 131 of the fixing table 110 and the hinge pin 132, The variable side plate 130 is rotated by the operation principle of the link structure constituted by the hinge connection portions 133 and 143, the hinge pin 144 and the movable rod 142 and is held in a horizontal state (refer to FIG. 12).

In the state where the variable plate 130 is spread horizontally, the variable plate 130 spread horizontally can be easily seen from the ground, so that the field worker can easily find the transmission tower 100 in which the failure has occurred, It will be possible to take action.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or essential characteristics thereof. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

T: Transmission tower 21: Main station
22: movable branch line 23: current transformer
24: level detector 25: maximum value detector
26: Surge / fault current discriminator 27:
28: RF module 29: DIP switch
30: Linear actuator driving unit 100: Aviation obstacle indication and fault point indication means
110: Fixture 120: Air disturbance indicator
130: variable plate 140: linear actuator
141: linear actuator body 142: movable rod
150:

Claims (1)

A lightning point and a fault point detection system in a transmission line that allows a lightning point or a fault point to be accurately discriminated by comparing and analyzing data of individual steel towers collected through detecting terminals with a computer program,
The reference value of the detection current of the detection current transformer is set to a value below the saturation point and the duration of the input surge waveform is measured from the time point at which the instantaneous value of the surge waveform reaches the reference value to the time at which the peak value falls below the reference value And a maximum value detection means for detecting the magnitude of the lightning current waveform by using the magnitude of the duration time and the magnitude of the surge waveform proportional to the magnitude of the duration time, Determination of surge / fault current to distinguish between surge current caused by lightning storm and fault current due to ground fault in steel tower. Wherein the surge / fault current discriminator comprises: a surge / fault current discriminator that is provided to the surge / fault current discriminator, A sampling unit for sampling every 50 占 퐏 for 1 ms; and a sampling unit for sampling one time every 50 占 퐏 for 1 ms. If the result of the sampling is a surge current when a specific value is output a maximum of 10 times, And means for determining a fault current,
Further comprising means for generating a correction value from the measured values for comparison and analysis of the data of the collected individual steel tows, wherein the correction value generating means comprises: a numerical value inputting the respective ground resistance value and the transient ground resistance value of each individual steel tower The input means and the Ohm's law defining the relationship between the resistance value and the current value for the numerical value input from the numerical value inputting means are applied to correct for each ground resistance value in case of a ground fault, And a correction means for performing correction according to each transient ground resistance value so that the generated correction values can be compared and analyzed by a computer program,
Further comprising an airblock display and a fault point display means installed on the power transmission tower to visually indicate the airbreak indicator and the fault point, wherein the airbreak indicator and the fault point display means are fixedly installed on the transmission tower; An aerial failure indicator fixed to an upper surface of the fixing table; A pair of variable plates provided on both sides of the fixing table so that a lower end thereof is rotatable; A linear actuator mounted on the fixing table for rotating the variable plate in an airbag display state; And a resilient spring installed on the linear actuator to elastically rotate the variable plate in a fixed point display state,
The linear actuator includes a linear actuator body and a movable rod reciprocating linearly by the linear actuator body. When the power source is applied, the movable rod retracts. When the power source is not applied, the movable rod is maintained in a free state And,
Wherein the distal end of the movable rod and the variable plate are hinged at a position spaced upward from a lower end of the variable plate.

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