KR100584185B1 - Apparatus and method for always monitoring of earth resistance using information communication equipment - Google Patents

Abstract

The present invention is to provide a device and a method for constantly monitoring the ground resistance of the information and communication equipment, comprising a grounding box, the real-time monitoring of the grounding resistance of the grounding box and generates an alarm when the grounding resistance changes, the Internet connection unit One or more unmanned substation grounding units having a grounding resistance measuring unit which is connected to the Internet via TCP / IP to monitor the grounding resistance even at a remote place; It is equipped with a grounding box, and monitors the grounding resistance of the grounding box at all times in real time, generates an alarm when the grounding resistance changes, and is provided with an Internet connection so that the grounding resistance can be monitored remotely by being connected to the Internet through TCP / IP. A power station grounding unit including a grounding resistance measuring unit and a server connected to the grounding resistance measuring unit and the grounding resistance measuring unit in the unmanned substation grounding unit; It is configured to include a remote management unit connected to the server in the power station ground through the Internet to perform remote management of the ground resistance.

Information and communication equipment, ground resistance, monitoring, ground box, measurement, substation, power station

Description

Apparatus and method for always monitoring of earth resistance using information communication equipment}

1 is a block diagram of a conventional grounding resistance measuring apparatus.

2 is a schematic diagram showing a ground state of a ground box for a conventional information and communication equipment.

3A to 3D are perspective views illustrating the configuration of the ground terminals in FIG. 2.

4 is a block diagram of an apparatus for constantly monitoring a grounding resistance of an information communication apparatus according to an exemplary embodiment of the present invention.

5 is a structural diagram of a ground box in FIG.

FIG. 6 is a perspective view illustrating a ground state of the ground box of FIG. 5. FIG.

7 is a perspective view of the ground terminal in FIG.

8 is a cross-sectional view illustrating a coupling state between the ground terminal and the vertical bus bar in FIG. 6.

9A to 9E are procedural diagrams illustrating an example of coupling the ground box in FIG. 6.

FIG. 10 is a detailed block diagram of the ground resistance measuring unit of FIG. 4.

11 is a flowchart illustrating a method of constantly monitoring a ground resistance for an information and communication equipment according to an embodiment of the present invention.

12 is a conceptual diagram showing an example of measuring the ground resistance when the voltage drop method is used when measuring the ground resistance according to the present invention.

13A to 13C are conceptual views illustrating examples of measuring ground resistance when the hook-on method is used when measuring ground resistance according to the present invention.

Explanation of symbols on main parts of the drawing

100: grounding box 110: main ground bus bar

111: main earth wire 112: main earth wire fastener

120: horizontal bus bar 121: crimp terminal

130: vertical bus bar 131: facility ground wire

132: hole 140: ground terminal

141: body 142: body hole

143: body recess 144: body semi-circle inclined portion

145: body slide groove 146: body ground wire receiving portion

150: slider 151: one side of the slider

152: the other side of the slider 153: the slanted slope portion

160: fixing bolt 170: auxiliary bus bar

180: booth 200: ground resistance measuring unit

210: power supply unit 220: A / D conversion unit

230: control unit 240: memory

250: display unit 260: internet connection unit

300: unmanned substation ground 400: server

500: power station grounding unit 600: remote management unit

610: power management department constant monitor unit 620: head office monitor unit

630: maintenance unit always monitor

The present invention relates to the monitoring of the ground resistance, in particular to the real-time monitoring of the ground resistance for information and communication equipment, and generates an alarm when the ground resistance changes due to lightning or surge (Surge), the ground resistance of the remote The present invention relates to an apparatus and a method for constantly monitoring a grounding resistor for an information and communication equipment, which is suitable for performing monitoring.

In general, earth resistance refers to the specified value when the facility is grounded for the purpose of protecting the facility or life, or the resistance measured when grounded. In telecommunications facilities, it is classified into communication ground, lightning ground, security ground, etc., and the ground resistance is divided into 1Ω or less or 100Ω or less, and ground resistance is also defined to make lightning grounding in case of buildings, etc. .

1 is a block diagram of a conventional ground resistance measuring apparatus, showing the configuration of Korean Patent Publication No. 10-2005-0048407 (application date: November 19, 2003).

As shown therein, a constant current AC voltage is supplied to the ground terminal 51 in which the neutral wire 52 and the ground rod 53 are embedded, and the neutral wire 52 and the ground wire 51 are connected according to the ground resistance of the ground electrode 51. A power supply unit 10 for generating a potential difference between the ground terminals 51; A potential difference detector (20) for detecting a potential difference between the neutral wire (52) and the ground terminal (51); A ground resistance calculator (30) for calculating the ground resistance of the ground terminal (51) by the potential difference detected by the potential difference detector (20) and the constant current of the power supply (10); The ground resistance calculator 30 is configured to display the display unit 40 for displaying the ground resistance.

The potential difference detecting unit 20 further includes: a safety switch 21 connected to a user's operation when measuring a ground resistance; An analog-to-digital converter (22) for converting a potential difference generated between the neutral wire (52) and the ground terminal (51) input through the safety switch (21) into a digital signal; And a memory 23 for storing a potential difference converted into a digital signal by the analog-to-digital converter 22 and outputting the potential difference to the ground resistance calculator 30.

Therefore, this conventional technique measures the value of the ground resistance of the ground electrode without using a separate auxiliary electrode.

However, this prior art did not always perform real-time monitoring of the ground resistance for information and communication equipment. It also failed to generate an alarm when the ground resistance changed. In addition, there was a limit that the monitoring of the ground resistance cannot be performed remotely.

2 is a schematic diagram showing a ground state of a ground box for a conventional information and communication equipment.

As shown in the drawing, conventionally, a plurality of facility ground wires 80 are grounded by a ground terminal 70 on one ground copper plate 60. A plurality of facility ground wires 80 are grounded in the ground copper plate 60. In order to ground new facility ground wires 80 to the ground copper plate 60, a new hole is made in the ground copper plate 60 to ground the ground. The terminal 70 is connected, and a new facility ground wire 80 is grounded to the ground terminal 70. So, as shown in Figure 2 after grounding a number of facility ground wires 80 to one ground copper plate 60, the ground copper plate 60 is installed under the iron floor.

As described above, after installing the ground copper plate 60 grounding predetermined facility ground wires 80 under the iron floor, it is difficult to ground other facility ground wires 80 to the ground copper plate 60 again. In addition, in the case of grounding a large number of facility ground wires 80 on the rectangular ground copper plate 60 as described above, the wiring is congested, and the maintenance and management are difficult.

On the other hand, according to the conventional grounding method as described above, the use of a non-standardized ground terminal has no choice but to use a ground terminal consisting of a number of accessories. In addition, in order to connect the facility ground wires 80 to the ground terminal 70, a complicated procedure must be performed, and many tools are required.

3A to 3D are perspective views illustrating the configuration of the ground terminals in FIG. 2. 3 (a) shows the combined structure of the 2-hole 38SQ (Square, cross-sectional area) copper tube ground terminal 70a, and (b) of FIG. 3 shows the coupling of the 1-hole 22SQ copper tube ground terminal 70b. Shows the structure. The copper tube ground terminal is composed of several accessories. 3 (c) shows the accessories 71a, 72a, 73a, 74a, 75a of the 2hole 38SQ copper tube ground terminal 70a, and FIG. 3 (d) shows the 1-hole 22SQ copper tube ground terminal 70b. Are accessories 71b, 72b, 73b, 74b, 75b.

The operator has to prepare a lot of components and a lot of tools in order to ground the grounding copper plate 60, the grounding wires (60) having various thicknesses to the copper tube grounding terminal described above.

However, it is difficult to carry the above components and tools every time the new facility ground wire 80 is grounded to the ground copper plate.

According to the related art described above, there is a problem of deteriorating the grounding quality because the non-standardized construction is performed by using the non-standardized grounding terminal, and it is difficult to carry the various tools necessary for the work at all times. Occurs.

In addition, according to the prior art, there is a problem in that construction of grounding new ground wires is difficult due to congestion of ground wires, and maintenance and post management are very difficult. In addition, due to the congestion of the wiring, space use is inefficient and the display of the wiring becomes difficult, so that it is impossible to find the ground wire except for the contractor.

In addition, since it takes a lot of time to ground the new ground wire using a crimping machine, etc., there is a disadvantage that the worker's stress is increased, the ground quality is degraded, and the subsequent process may be affected.

Therefore, the present invention has been proposed to solve the conventional problems as described above, the object of the present invention is to perform the real-time monitoring of the ground resistance for information and communication equipment, and when the ground resistance changes due to lightning or surge An object of the present invention is to provide an apparatus for monitoring a ground resistance for an information and communication equipment and a method thereof, which generates an alarm and can monitor the ground resistance even in a remote place.

In order to achieve the above object, the constant monitoring device of the earth resistance for information and communication equipment according to an embodiment of the present invention,

It is equipped with a grounding box, and monitors the grounding resistance of the grounding box at all times in real time, generates an alarm when the grounding resistance changes, and is provided with an Internet connection so that the grounding resistance can be monitored remotely by being connected to the Internet through TCP / IP. One or more unmanned substation grounding units having a grounding resistance measuring unit; It is equipped with a grounding box, and monitors the grounding resistance of the grounding box at all times in real time, generates an alarm when the grounding resistance changes, and is provided with an Internet connection so that the grounding resistance can be monitored remotely by being connected to the Internet through TCP / IP. A power station grounding unit including a grounding resistance measuring unit and a server connected to the grounding resistance measuring unit and the grounding resistance measuring unit in the unmanned substation grounding unit; It is characterized in that the technical configuration is made by including a remote management unit for remote management of the ground resistance is connected to the server in the power station ground through the Internet.

In order to achieve the above object, the constant monitoring method of the earth resistance for information and communication equipment according to an embodiment of the present invention,

Setting and counting the ground resistance measurement interval to determine whether the set time is reached; Receiving a ground resistance of the ground box as an analog signal when the set time is reached, converting the ground resistance into a digital signal, and then recording and displaying the converted digital ground resistance value; A third step of comparing the ground resistance value measured after the second step with the recorded ground resistance value and generating an alarm if the compared ground resistance value is greater than or equal to a threshold value; And a fourth step of enabling the remote site to search and manage the ground resistance value of the ground box after the third step.

Hereinafter, an embodiment of the present invention as described above, an apparatus for continuously monitoring a ground resistance for information and communication equipment and a method thereof will be described with reference to the accompanying drawings.

4 is a block diagram of an apparatus for constantly monitoring a grounding resistance of an information communication apparatus according to an exemplary embodiment of the present invention.

As shown in the figure, a ground box 100a is provided, and the ground resistance of the ground box 100a is always monitored in real time, an alarm is generated when the ground resistance changes, and the Internet connection unit 260 is provided with TCP / IP ( One or more unmanned substation grounding units having a grounding resistance measuring unit 200a connected to the Internet through a transmission control protocol / internet protocol to monitor grounding resistance even at a remote location. 300; A ground box 100b is provided, and the ground resistance of the ground box 100b is always monitored in real time, an alarm is generated when the ground resistance changes, and an Internet connection unit 260 is provided to connect to the Internet through TCP / IP to provide a remote location. Also provided with a ground resistance measuring unit 200b for monitoring the ground resistance, and connected to the ground resistance measuring unit 200b and the ground resistance measuring unit 200a in the unmanned substation grounding unit 300. A power station ground portion 500 having a 400; It is characterized in that it comprises a remote management unit 600 is connected to the server 400 in the power station grounding unit 500 through the Internet to perform remote management of the ground resistance.

FIG. 5 is a structural diagram of the ground box in FIG. 4, FIG. 6 is a perspective view illustrating a ground state of the ground box in FIG. 5, FIG. 7 is a perspective view of the ground terminal in FIG. 6, and FIG. 8 is a vertical bus bar in FIG. 6. Figure 9 is a cross-sectional view showing a coupling state, Figures 9a to 9e is a procedure showing an example of coupling the grounding box in FIG.

As shown in this, the grounding box 100, characterized in that configured to ground the facility ground wire having a variety of thickness integrated in one booth using a grounding terminal.

The ground box 100 includes a main ground bus bar 110 horizontally installed above the ground box 100 so as to ground the main ground wire; A vertical bus bar 130 having one end coupled to the main ground bus bar 110 and vertically installed in the ground box 100; A ground terminal 140 coupled to the vertical bus bar 130 to ground facility ground lines 131 having various thicknesses used for various facilities; A horizontal bus bar 120 connected horizontally to the bottom of the vertical bus bar 130 to ground a thin ground wire; Booth 180 that accommodates the main ground bus bar 110, the vertical bus bar 130, the ground terminal 140, the horizontal bus bar 120, the door is formed and has an opening in a predetermined portion It characterized in that it comprises a).

FIG. 10 is a detailed block diagram of the ground resistance measuring unit of FIG. 4.

As shown therein, a power supply unit 210 for supplying power to the A / D conversion unit 220; An analog to digital (A / D) converter 220 for converting an analog power signal value supplied from the power supply unit 210 and an analog ground resistance value supplied from the ground box 100 into a digital signal; The digital signal is input from the A / D converter 220 to monitor the ground resistance of the ground box 100, generate an alarm when the ground resistance changes, and control the operation of the ground resistance measurement unit 200. A controller 230; A memory 240 connected to the controller 230 for storing the measured ground resistance value and storing the control result of the controller 230; A display unit 250 displaying a result controlled by the controller 230; It is connected to the control unit 230, it is characterized in that it is configured to include an Internet connection unit 260 to be connected to the Internet through TCP / IP to perform the monitoring of the ground resistance even at a remote location.

As shown in FIG. 4, the remote management unit 600 is connected to the server 400 in the power station grounding unit 500 through the Internet, and is grounded in the one or more unmanned substation grounding units 300. 100a, a power management station always-monitor unit 610 installed at a power management station or a head office monitor unit installed at a head office to perform remote monitoring of one or two or more of the ground box 100b in the power station grounding unit 500; 620 or one or more monitors 610 to 630 of the maintainer regular monitor unit 630 to be used by the maintainer.

11 is a flowchart illustrating a method of constantly monitoring a ground resistance for an information and communication equipment according to an embodiment of the present invention.

As shown therein, a first step (ST1 to ST3) of setting and then counting the ground resistance measurement interval to determine whether the set time is reached; A second step (ST4, ST5) of receiving the ground resistance of the ground box 100 as an analog signal and converting it into a digital signal when the set time is reached, and then recording and displaying the converted digital ground resistance value; A third step (ST6 to ST8) of comparing the ground resistance value measured after the second step with the recorded ground resistance value and generating an alarm if the compared ground resistance value is greater than or equal to the threshold value; And a fourth step (ST9) for retrieving and managing the ground resistance value of the ground box 100 at a remote location after the third step.

The continuous monitoring of the ground resistance for information and communication equipment according to the present invention configured as described above and the operation of the method will be described in detail with reference to the accompanying drawings.

First of all, the present invention is to always perform real-time monitoring of the ground resistance for information and communication equipment, to generate an alarm when the ground resistance changes due to lightning or surge, and to monitor the ground resistance at a remote location.

Thus, in the present invention, as shown in FIG. 4, the unmanned substation ground unit 300 installed in a plurality of unmanned substation information communication rooms, etc., the power station grounding unit 500 installed in the power station information communication room, and remotely perform remote management through the Internet It can be configured as the management unit 600.

At this time, the remote management unit 600 may be configured as a power management station always monitor 610, the headquarters monitor unit 620, the maintenance person monitor unit 630, and the like.

The remote management unit 600 is connected to the power station grounding unit 500 in which the server 400 is installed through the Internet.

In addition, the server 400 is connected to the ground resistance measurement unit 200b in the power station grounding unit 500 and the ground resistance measurement unit 200a in the unmanned substation grounding unit 300 by using the TCP / IP method. do.

Meanwhile, the ground box 100a installed in the plurality of unmanned substation ground units 300 and the ground box 100b installed in the power station ground unit 500 may have the same configuration as illustrated in FIGS. 5 to 9. In addition, the grounding box 100 may be configured to ground the facility ground wire having various thicknesses by integrating the grounding terminal into one booth.

The configuration and operation of the ground box 100 will be described in more detail with reference to FIGS. 5 to 9 as follows.

5 is a structural diagram of a ground box in FIG.

Thus, the ground box 100, the main ground bus bar 110 is installed horizontally above the inside of the ground box 100 to ground the main ground wire; A vertical bus bar 130 having one end coupled to the main ground bus bar 110 and vertically installed in the ground box 100; A ground terminal 140 coupled to the vertical bus bar 130 to ground facility ground lines 131 having various thicknesses used for various facilities; A horizontal bus bar 120 connected horizontally to the bottom of the vertical bus bar 130 to ground a thin ground wire; The booth 180 accommodates the main ground bus bar 110, the vertical bus bar 130, the ground terminal 140, and the horizontal bus bar 120, and has a door and has an opening in a predetermined portion. It consists of).

The booth 180 is an outer case constituting the ground box 100, and in addition to the main ground bus bar 110, the vertical bus bar 130, the ground terminal 140, the horizontal bus bar 120, the configuration A support (not shown) for supporting the elements will be further included and will further include a label disposed on each ground terminal 140 to indicate which facility the ground line is. On the other hand, the booth 180 is a door is formed so that the manager can open the interior (open) to check the grounding state at any time, by arranging the facility ground wires 131 to be grounded by the ground terminal 140 An opening (not shown in the figure) is provided at a predetermined position so as to be installed.

In addition, the horizontal bus bar 120 is connected horizontally to the bottom of the vertical bus bar 130 to ground a ground wire of a thickness thinner than the thickness of the facility ground wire 131 is grounded to the vertical bus bar 130. That is, the thickness of the facility grounding line grounded to the vertical busbar 130 corresponds to 14SQ to 38SQ, and the thickness of the facility grounding line grounded to the horizontal busbar 120 corresponds to 8SQ or less. A ground terminal 140 is used to ground the facility ground lines 131 to the vertical bus bar 130, but a copper tube ground terminal generally used to ground the thin ground line to the horizontal bus bar 120 is used. I use it.

FIG. 6 is a perspective view illustrating a grounding state of the grounding box in FIG. 5. The main grounding wire 111 and the facility grounding line 131 grounded to the main grounding busbar 110 and the vertical busbar 130 accommodated in the grounding box 100. This is a detailed view showing the grounding state of).

Thus, the main ground bus bar 110 is installed horizontally above the inside of the ground box 100. The main ground wire fastener 112 connects the main ground wire 111 coming from the outside to the main ground bus bar 110 so that the main ground wire 111 is grounded to the main ground bus bar 110. On the other hand, the thickness of the main ground wire 111 is grounded to the main ground bus bar 110 corresponds to 100SQ.

The vertical bus bar 130 has one end coupled to the main ground bus bar 110 and is vertically installed in a predetermined space inside the ground box 100. The vertical bus bar 130 is installed to electrically ground the equipment ground wire 131 used in various facilities to the main ground wire 111 grounded on the main ground bus bar 110.

The plurality of vertical bus bars 130 may be arranged according to the number of facility ground lines 111 to be grounded. That is, if one vertical bus bar 130 can cover the facility ground wires 111 used in the surrounding facilities, it may be safe to use only one in consideration of cost, and in the case where many facilities are arranged around Vertical busbars 130 may be used.

In addition, as shown in FIG. 5 or FIG. 6, if two vertical bus bars 130 are installed side by side, most of the equipment ground lines 131 used in the surrounding equipment may be covered. If the two vertical busbars 130 installed side by side cannot cover all the equipment ground lines used in the surrounding equipment, the two vertical busbars 130 and the main ground busbars shown in FIG. It may be solved by arranging the connection structure of 110 in the rear. In this case, the door provided in the booth 180 is preferably formed back and forth. When placed sideways, it is placed backward because it is difficult to handle the equipment ground wire.

On the other hand, the vertical bus bar 130 is formed with a plurality of holes 132, the thread is formed. Although the arrangement of the threaded holes 132 may be changed according to the structure of the ground terminal 140 to be described later, as shown in FIG. 6, two pairs are formed in the horizontal direction to extend in the vertical direction. It is preferable. That is, as will be described later, since the ground terminal 140 and the vertical bus bar 130 are fixed by two fixing bolts, holes 132 are formed as shown in FIG. 6.

The ground terminal 140 is coupled to the vertical bus bar 130 to ground the equipment ground line 131 used for various equipment. The facility ground wire 131 connected to the ground terminal 140 may have various thicknesses. That is, instead of using only a specific grounding terminal 140 to ground a specific grounding wire 131, the grounding wire 131 having various thicknesses may be bited to one grounding terminal 140.

7 is a perspective view of the ground terminal in FIG.

Thus, as shown in Figure 7, the ground terminal 140 is composed of a body 141, a slider 150, and a fixing bolt 160.

The body 141, as shown in Figure 7, the overall shape of a rectangular shape, the slider 150 has a couple of two surface coupled to have a tracer shape, the fixing bolt 160 is a general screw coupling Possible bolts.

The body 141 is formed with a rectangular body hole 142 in the longitudinal direction therein. In addition, at least two concave portions (hereinafter, concave portions 143) are formed on the upper inner surface of the body hole 142. Although the number of body recesses 143 shown in FIG. 7 is two, the present invention is not limited thereto, and the number of holes 132 formed horizontally in the vertical bus bar 130 and the number of fixing bolts 160 are provided. you can change it.

The body 141 is provided with a body semi-circular inclined portion 144 inclined outward from one end of the body recessed portion 143 positioned in the front portion of the body hole 142. And, as shown in Figure 7, the body slide groove 145 is formed along the front lower side of the body hole 142, the body ground wire receiving portion 146 of a predetermined shape on the rear lower side of the body hole 142. Is provided.

Meanwhile, as shown in FIG. 7, the slider 150 coupled to the inside of the body 73 to perform a sliding role has a predetermined slope to a portion where two surfaces are coupled to each other so that the two surfaces are connected. It has a slider diagonal inclination part 153 which has a.

One of the two surfaces of the slider 151 is fitted into the body slide groove 145 formed in the body 141 and slides, and the slider other surface 152 is the body 141 and the slider 150. Is coupled to the body ground wire receiving portion 146 provided in the body 141 when coupled is formed to accommodate the facility ground line 131.

The fixing bolt 160 has a hole formed in the vertical bus bar 130 through a body recess 143 formed in the body 141 in a state in which the body 141 and the slider 150 are coupled to each other. Screwed to 132. At this time, the head of the fixing bolt 160 slides in contact with the body semi-circumferential inclined portion 144 formed in the body 141 and the slider diagonal inclined portion 153 formed in the slider 150.

8 is a cross-sectional view illustrating a coupling state between the ground terminal and the vertical bus bar in FIG. 6.

As shown in FIG. 8, the body 141 of the ground terminal 140 is in contact with the vertical bus bar 130, and the slider 150 is slidable within the body 141. It is fitted. The facility ground line 131 is accommodated in the body ground line accommodating part 146 and fixedly coupled to the slider other surface 152. On the other hand, the fixing bolt 160 is the body concave portion with the head in contact with the body semi-circumferential inclined portion 144 provided on the body 141 and the slider oblique inclined portion 153 provided on the slider 150. It is screwed to the vertical bus bar 130 through 143.

9A to 9E are diagrams illustrating an example of coupling a ground box in FIG. 6, and illustrates a procedure of grounding a facility ground line to a vertical busbar by coupling a facility ground line to a ground terminal.

First, the manager contacts the body 141 of the ground terminal 140 to the vertical bus bar 130, and then slightly tightens the fixing bolt 160 to couple the body 141 to the vertical bus bar 130. Then, the sheath of the equipment grounding wire 131 used for the specific equipment is peeled off using a knife or the like (see FIG.

Then, the stripped facility ground wire 131 is inserted into the body ground wire receiving portion 146, and the slider 150 is prepared to be coupled to the body 141 (see FIG. 7 (b)).

Slider 150 is accommodated inside the body 141, the slider one surface 151 is fitted into the body slide groove 145 (see Fig. 7 (c)).

Then, tighten the fixing bolt 160 using a predetermined driver. Then, the body 141 and the vertical bus bar 130 is strongly coupled, and at the same time the head of the fixing bolt 160 slides on the body semi-circumferential inclined portion 144 and the slider oblique inclined portion 153.

As a result, the slider 150 is tightened such that the facility ground wire 131 can not be separated from the body ground wire receiving portion 146 while making a slight sliding under the body 141 (see FIG. 7 (d)).

In this manner, when the facility grounding wire 131 is grounded to the grounding terminal 140, it becomes as shown in FIG.

10 is a detailed block diagram of the ground resistance measuring unit in FIG. 4.

Therefore, the power supply unit 210 supplies power to the A / D converter 220 so that the potential difference between the mesh ground and the ground box 100 can be detected by the A / D converter 220.

The A / D converter 220 measures the ground resistance by converting the analog power signal value supplied from the power supply unit 210 and the analog ground resistance value supplied from the ground box 100 into a digital signal, and measuring the ground resistance. Allows you to take the necessary actions depending on the transition status.

In addition, the control unit 230 receives a digital signal from the A / D conversion unit 220 to monitor the ground resistance of the ground box 100 and generates an alarm when the ground resistance changes, the operation of the ground resistance measuring unit 200 To control.

In addition, the memory 240 is connected to the control unit 230 and stores the measured ground resistance value, and stores the control results of the control unit 230. The memory 240 may automatically accumulate ground resistance data of one year or more according to the setting of the storage capacity.

In addition, the display unit 250 displays the result controlled by the controller 230. The display unit 250 may be configured as an LCD (Liquid Crystal Display) monitor or the like, and allows a maintenance person to directly check the state of the ground resistance without accessing a remote site through the Internet.

In addition, the Internet connection unit 260 is connected to the control unit 230, and is connected to the Internet through TCP / IP to enable the monitoring of the ground resistance even at a remote location.

In addition, the ground resistance measurement unit may be configured by further adding a universal serial bus (USB) and a serial communication port, and may include a remote download function of data and a conversion function of ground resistance data into Excel data.

In addition, the server 400 in the power station grounding unit 500 provides the necessary functions to monitor the ground resistance of the power station grounding unit 500 of each substation information communication room at a remote site at all times. It also allows alarms to be notified to remote maintenance personnel in the event of sudden changes in ground resistance. In addition, the comparative analysis of the ground resistance of the unmanned substation grounding unit 300 of each unmanned substation information and communication room, the automatic data accumulation function, the graph of daily / monthly / quarterly / yearly change of the ground resistance and the function of providing the result report are provided. Can be done.

11 is a flowchart illustrating a method of constantly monitoring the ground resistance of the information communication facility according to an embodiment of the present invention.

Thus, the ground resistance measurement interval is set by directly controlling the control unit 230 in the ground resistance measurement unit 300 or by remote control in the remote management unit 600. At this time, the measurement interval is preferably repeated at least 10 seconds. Of course, the measurement interval may be set to a value of 0 to measure manually, or may be set in units of 10 seconds or more (ST1).

In addition to setting the measurement interval in this way, it is also possible to set the measurement range. For example, the resistance value can be measured in the range of 0 kV to 1000 kV.

Then, the controller 230 drives a timer (not shown) provided therein to perform a count (ST2).

When the set time is reached during the counting, the ground resistance is measured and processed (ST3).

Thus, the A / D converter 220 receives the mesh ground and the ground resistance of the ground box 100 as an analog signal and converts the ground signal into a digital signal (ST4).

The converted digital ground resistance value is transmitted to the controller 230 for processing, and the processing result is recorded in the memory 230 and displayed on the display unit 250. At this time, the display unit 250 is directly attached to the ground resistance measuring unit 200 so that the maintenance personnel can easily determine the ground resistance state (ST5).

In addition, the controller 230 compares the ground resistance value measured by the A / D converter 220 with the ground resistance value recorded in the memory 240 (ST6).

The controller 230 determines whether the compared ground resistance value is greater than or equal to a preset limit value (ST7).

Thus, the controller 230 generates an alarm when the compared ground resistance value is greater than or equal to a preset threshold. In this case, the alarm may generate an alarm directly from the unmanned substation ground unit 300 or the power station ground unit 500, or may generate an alarm to the remote management unit 600 remotely connected through the Internet (ST8).

In addition, the maintainer at the remote site searches for and manages the ground resistance value of the ground box 100 at the remote location by using the power management station always monitor unit 610, the head office monitor unit 620, the maintainer always monitor unit 630, and the like. (ST9).

12 is a conceptual diagram illustrating an example of measuring the ground resistance when the voltage drop method is used when measuring the ground resistance according to the present invention.

FIG. 12 illustrates the Wener electrode method, in which the potential electrodes P1 and P2 are disposed on the inside of the measurement line in a straight line, and the current electrodes C1 and C2 are disposed outside, and between C1-P2, P1-P2, and P2-C2. Make the distances of equal intervals.

Thus, the current I is injected into the external electrodes C1 and C2, and the potential difference V between the internal potential electrodes P1 and P2 is measured, and the ground resistance is obtained by the following equation (1).

R = V / I = ρ / σ

Where R is the resistance, ρ is the high resistivity, and σ is the constant. In the case where the electrodes do not maintain the same interval, the earth resistance is determined by Schlumberger equation, which is the same as Equation 1 and only the value of the constant σ is different.

In order to measure the earth resistance, earth resistance must be measured. In order to measure earth resistance, the four-pole measuring electrode must be measured by the Wenner method. Since earth resistance is affected by soil temperature, soil humidity and so on, it will change according to season and weather changes, so it is necessary to record the measurement for one year. Due to the inconvenience and cost, such measurement is conventionally avoided.

On the other hand, the present invention makes it easy to secure a one-year measurement record in real time at any time even at a remote site, and thus, it is possible to easily measure the ground resistance by the voltage drop method.

13A to 13C are conceptual views illustrating examples of measuring ground resistance when the hook-on method is used when measuring ground resistance according to the present invention.

First, the voltage is applied from the clamp to the ground circuit.

The current I then flows through the ground circuit.

Measure the current I with the second clamp.

This causes the loop ground resistance Rx + Rn to be displayed. (See Figure 13 (a))

Also, referring to FIG. 13B, if the resistance of the ground electrode Rx to be measured is lower than the resistors R1, ..., Rn connected in parallel with Rn, the following equation (2) is established.

(1 / ((1 / R1) + (1 / R2) + ..... + (1 / Rn))) << R _X

Thus, as in FIG. 13 (c), Rx = U / I is an approximation that makes sense.

As described above, the present invention measures the ground resistance by using the voltage drop method of FIG. 12 or the hook-on method of FIG. 13, and processes the measured value in the ground resistance measuring unit 200 to always provide ground resistance for information and communication equipment. It performs real-time monitoring of the alarm, generates an alarm when the ground resistance changes due to lightning or surge, and monitors the ground resistance even at a remote location.

Although the above has been described as being limited to the preferred embodiment of the present invention, the present invention is not limited thereto and various changes, modifications, and equivalents may be used. Therefore, the present invention can be applied by appropriately modifying the above embodiments, it will be obvious that such application also belongs to the scope of the present invention based on the technical idea described in the claims below.

As described above, the apparatus and method for constantly monitoring the ground resistance of the information and communication equipment according to the present invention perform real-time monitoring of the ground resistance for the information and communication equipment, and change the ground resistance under the influence of lightning or surge. It generates an alarm and has the effect of monitoring the ground resistance at a remote location.

In addition, the present invention can automatically accumulate the ground resistance data, can directly check the state of the ground resistance through the LCD monitor, etc., and can be connected to the Internet through TCP / IP to monitor the ground resistance even in remote places It is effective.

In addition, the present invention has the advantage of performing a comparative analysis function of the ground resistance, automatic data accumulation function, providing a graph of the daily / monthly / quarterly / yearly change of the ground resistance and provide a result report.

Claims (6)

A main ground bus bar horizontally installed above the inside of the ground box for grounding a main ground wire, a vertical bus bar having one end coupled to the main ground bus bar and vertically installed in the ground box, and coupled to the vertical bus bar A ground terminal for grounding a facility ground wire having various thicknesses used in various facilities, a horizontal bus bar horizontally connected to a lower end of the vertical bus bar to ground a thin ground wire, the main ground bus bar, and the vertical bus bar A ground box configured to accommodate the ground terminal and the horizontal bus bars, and including a booth having a door formed therein and having an opening in a predetermined portion; A power supply unit for supplying power to an A / D conversion unit, an A / D conversion unit for converting an analog power signal value supplied from the power supply unit and an analog ground resistance value supplied from the ground box into a digital signal, and the A A digital signal input from the / D converter to monitor the ground resistance of the ground box and generate an alarm when the ground resistance changes, and a ground resistance value measured by being connected to the controller A memory for storing the control result of the controller, a display unit for displaying the result controlled by the controller, a connection with the controller and an internet connection through TCP / IP, and monitoring of the ground resistance at a remote location One or more unmanned substations with earth resistance measurement configured to include an internet connection A grounding part; A main ground bus bar horizontally installed above the inside of the ground box for grounding a main ground wire, a vertical bus bar having one end coupled to the main ground bus bar and vertically installed in the ground box, and coupled to the vertical bus bar A ground terminal for grounding a facility ground wire having various thicknesses used in various facilities, a horizontal bus bar horizontally connected to a lower end of the vertical bus bar to ground a thin ground wire, the main ground bus bar, and the vertical bus bar A ground box configured to accommodate the ground terminal and the horizontal bus bars, and including a booth having a door formed therein and having an opening in a predetermined portion; A power supply unit for supplying power to an A / D conversion unit, an A / D conversion unit for converting an analog power signal value supplied from the power supply unit and an analog ground resistance value supplied from the ground box into a digital signal, and the A A digital signal input from the / D converter to monitor the ground resistance of the ground box and generate an alarm when the ground resistance changes, and a ground resistance value measured by being connected to the controller A memory for storing the control result of the controller, a display unit for displaying the result controlled by the controller, a connection with the controller and an internet connection through TCP / IP, and monitoring of the ground resistance at a remote location A grounding resistance measuring unit including an internet connection unit, A power station grounding unit including a server connected to the grounding resistance measuring unit and the grounding resistance measuring unit in the unmanned substation grounding unit; A power management station that is connected to a server in the power station grounds via the Internet and is installed in the power management station to perform remote monitoring of one or more of the ground box in the unmanned substation grounds and the ground box in the power station grounds A remote management unit including one or more monitor units of the main office monitor unit installed at the main office or the main office, or a maintenance monitor which can be used by the maintainer; Always monitoring device of the ground resistance for information and communication equipment, characterized in that configured to include. delete delete delete delete delete

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