KR20230023453A - Cable connection condition auto-check device and auto-checking method - Google Patents

Abstract

An apparatus for automatically inspecting the wiring state of a cable, according to the present invention, may comprise: a first fastening unit and a second fastening unit which can fasten one end connector and the other end connector of a cable to be checked, respectively; an operating unit for receiving, from an operator, information about at least one of a first device that has been connected to the one end connector of the cable to be checked and a second device that has been connected to the other end connector; a wiring determination unit for securing normal wiring information according to combinations of types of the first device and the second device, and checking whether or not each unit line constituting the cable to be checked, which is fastened to the first fastening unit and the second fastening unit, matches the normal wiring information; and an output unit for outputting a result of checking whether or not the normal wiring information is matched.

Description

Cable connection condition automatic checking device and method {CABLE CONNECTION CONDITION AUTO-CHECK DEVICE AND AUTO-CHECKING METHOD}

The present invention is a cable wiring state automatic checking device for automatically checking (Auto-Check) the wiring state of a communication cable for remote connection of a relay. An apparatus and method for automatically checking a cable connection state for checking the connection state in advance.

Acquire data by remotely accessing the relay in the substation to identify and analyze the fault point when a fault occurs in the power system (fault point distance, fault current, voltage drop, etc.)

When remotely accessing the relay, data can be obtained through the PDAS (Protection Relay Remote Acquisition System) data collection device and the server of the head office.

The data collection device communicates with the upper server through Ethernet, and the protection relay uses serial communication or Ethernet communication method with the data collection device. As can be seen in Table 1 below, which shows the serial type relay manufacturer and model name, there are various types of relays within the serial type, and various cable connection methods are applied.

As described above, protective relays have various manufacturers and models, and wiring methods for each model are different, resulting in many incorrect wiring due to operator mistakes. However, since the system operation department and the facility department are different, it is difficult to check the wiring in real time during cable work. In other words, it is necessary to connect remotely and confirm the final confirmation, but remote access by the operator is not possible.

This makes it take more than 1 hour for on-site dispatch and confirmation when remote access is not possible in the event of a system failure, delaying the time to confirm the location of the fault and restore the facility.

Republic of Korea Registration No. 10-0947342

An object of the present invention is to provide an installation and efficient inspection method for the stable operation of a remote acquisition system of relay data.

An object of the present invention is to provide a device that automatically checks whether the wiring of the connectors at both ends of the communication cables of the protection relays having different cable wiring methods are properly connected when connecting the communication cables between the protection relay and the relay data collection device.

An apparatus for automatically checking a cable connection state according to an aspect of the present invention includes: a first fastening part and a second fastening part capable of respectively fastening one end connector and the other end connector of a cable to be checked; a manipulation unit for receiving, from an operator, information on at least one of a first device connected to one end connector of the cable to be checked and a second device connected to the other end connector in a field; Normal connection information is secured according to the type combination of the first device and the second device, and for each unit line constituting the cable to be checked connected to the first fastening part and the second fastening part, a wiring decision unit that checks whether or not the normal wiring information matches; And it may include an output unit for outputting a result of checking whether or not the normal connection information matches.

Here, it may further include a storage unit for storing a normal connection information list composed of normal connection information according to a type combination of the first device and the second device.

The device may further include a storage unit for storing a device list, and when the output unit displays the device list on a screen, the manipulation unit may receive a device designation input from an operator among devices belonging to the device list displayed on the screen.

Here, the output unit may display on the screen a unit line that does not match the normal connection information among unit lines constituting the cable to be checked.

Here, a data input/output unit receiving data related to the normal connection information from an external server may be further included.

Here, the attenuation checker may further include checking whether the attenuation degree of the signal of each of the unit lines is within a predetermined reference value.

Here, at least one of the first fastening part and the second fastening part may have at least two or more different types of ports so that an operator can selectively fasten them.

Here, a power supply unit supplying driving power for the wiring determination unit and the output unit may be further included.

A method for automatically checking a cable connection state according to another aspect of the present invention includes a device designation step of designating a type for at least one of a first device and a second device respectively connected to both ends of a cable to be checked; securing normal connection information according to the type designated in the device designation step; confirming that connectors at both ends of the cable to be checked are fastened with an automatic inspection device; checking whether each unit line constituting the cable to be checked is consistent with the normal connection information; and outputting a result of checking whether or not the normal connection information matches.

Here, an attenuation checking step of checking whether the attenuation degree of the signal of each of the unit lines is within a predetermined reference value may be further included.

Here, the device designation step may include a device list output step of displaying a device list consisting of candidate relay model names on a display screen of an automatic cable connection state checking device; and an operator selection receiving step of receiving a device designation for a device type from an operator among devices belonging to the device list displayed on the screen.

Here, in the step of securing normal connection information, normal connection information for the designated type may be retrieved and secured from a list of normal connection information according to a type combination of the first device and the second device.

Here, in the step of outputting the confirmation result, unit lines that do not match the normal connection information among unit lines constituting the confirmation target cable may be displayed on the screen.

If the apparatus for automatically checking the communication cable connection state according to the spirit of the present invention having the above configuration is implemented, there is an advantage in reducing failure analysis and facility recovery time by removing the cause of connection failure by relay type in advance.

The device for automatically checking the connection state of a communication cable according to the present invention has the advantage of drastically reducing inspection time through One-Click connection inspection.

1 is a block diagram showing an embodiment of an apparatus for automatically checking a cable connection state according to the spirit of the present invention.
Figure 2a is a plan view showing an example of the front appearance of the device for automatically checking the cable connection state according to the spirit of the present invention.
Figure 2b is a side view showing an example of the side appearance of the automatic cable connection state checking device according to the spirit of the present invention.
Figure 3a is a plan view showing another example of the front appearance of the device for automatically checking the cable connection state according to the spirit of the present invention.
Figure 3b is a plan view showing another example of the rear appearance of the device for automatically checking the cable connection state according to the spirit of the present invention.
4 is a block connection configuration diagram showing an example of a hardware configuration of an apparatus for automatically checking a cable connection state according to the spirit of the present invention.
5 is a flowchart illustrating an embodiment of a method for automatically checking a cable connection state according to the spirit of the present invention.

In describing the present invention, terms such as first and second may be used to describe various components, but the components may not be limited by the terms. Terms are only for the purpose of distinguishing one element from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention.

When a component is referred to as being connected or connected to another component, it may be directly connected or connected to the other component, but it may be understood that another component may exist in the middle. .

Terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions may include plural expressions unless the context clearly dictates otherwise.

In this specification, the terms include or include are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features or numbers, It can be understood that the presence or addition of steps, operations, components, parts, or combinations thereof is not precluded.

In addition, shapes and sizes of elements in the drawings may be exaggerated for clearer description.

Various devices such as relays (protection relays) are installed in fields (sites) constituting power transmission paths of power systems, such as substations and switchboards. is placed

The data collection device is generally a kind of dedicated gateway managed by a power company, and standards are unified by the power company. On the other hand, relays and protective relays have strong versatility that can be used for various purposes, not just substations or switchboards. There are various manufacturers, but standardization negotiations on them are not yet complete, so each manufacturer has different data input/output specifications, and data input/output ports Even the form of is a different reality.

Accordingly, in a field such as a substation or switchboard, in connecting each relay (protection relay) installed in the field and the data collection device, a port that can be connected to the port of each relay (protection relay) is formed at one end, and a data collection device is formed at the other end. A cable having a port that can be connected to the port of the device is separately manufactured and used.

In the present invention, when a failure occurs in the power system, the operator for identifying the cause of the failure put into the field where the failure occurred, using the device for automatically checking the cable connection state presented according to the spirit of the present invention, It is suggested to check the individually manufactured cable connecting the relay (protection relay) and the data collection device first.

That is, the present invention is a device that automatically checks whether the cable to be checked in the field where the failure has occurred is directly wired, more specifically, when connecting the communication cable between the protection relay and the data collection device related to the field where the failure occurred, In particular, we propose a device that automatically checks whether the wiring of the connectors at both ends of the communication cable of the protection relays with different cable wiring methods is wired correctly.

In the following detailed description, the protection relay is defined as the first device and the relay data collection device is defined as the second device, which is to clarify that the scope of the present invention is not limited to the scope of the protection relay.

1 is a block diagram showing an embodiment of an apparatus for automatically checking a cable connection state according to the spirit of the present invention.

Figure 2a is a plan view showing an example of the front appearance of the automatic cable connection state inspection device according to the spirit of the present invention, Figure 2b shows an example of the side appearance of the automatic cable connection state inspection device according to the spirit of the present invention This is one side view.

3A is a plan view showing an example of a front appearance of an apparatus for automatically checking a cable connection state according to the spirit of the present invention, and FIG. 3B is a plan view showing an example of a rear appearance.

4 is a block connection configuration diagram showing an example of a hardware configuration of an apparatus for automatically checking a cable connection state according to the spirit of the present invention.

The illustrated cable connection state automatic checking device includes a first fastening part 110 and a second fastening part 120 capable of respectively fastening one end connector and the other end connector of a cable to be checked; a manipulation unit (130) for receiving, from an operator, information on at least one of a first device connected to one connector of the cable to be checked and a second device connected to the other connector in the field; Normal connection information is secured according to the type combination of the first device and the second device, and each unit constituting the cable to be checked connected to the first connection part 110 and the second connection part 120 A wiring decision unit 140 that checks whether the lines match with the normal wiring information; and an output unit 180 outputting a result of checking whether or not the normal connection information matches.

As shown according to the implementation, the attenuation checker 150 checks whether the attenuation degree of the signal of each unit line is within a predetermined reference value; a power supply unit 190 supplying driving power for the wiring determination unit 140 and the output unit 180; and a storage unit 160 for storing necessary data such as a normal connection information list composed of normal connection information according to a type combination of the first device and the second device.

2a, 2b, and 3a, the first coupling parts 110 and 110-1 are configured so that the target cable C can be connected to a connector once connected to a relay as the first device. It has the form of a serial port, and the second connection part (120, 120-1) is in the form of an RJ-45 port so that the target cable (C) can be connected to the other end connector connected to the data collection device as the second device. has This is in consideration of the fact that most cables where misconnections occur have a serial port at one end and an RJ-45 port at the other end.

However, in view of the fact that depending on the manufacturer, not only the serial port but also the RJ-45 port is provided as the data input/output port of the relay, the first fastening part (110, 110-1 As shown in FIG. 1, it is advantageous to have at least two or more different types of ports (a serial port and an RJ-45 port in FIG. 1) so that the operator can selectively connect them.

The output unit 180 displays a unit line that does not match the normal connection information among unit lines constituting the cable to be checked on a screen and/or displays whether or not it matches the normal connection information. It may be an LED. Figure 2a illustrates an implementation provided with an LCD module and an LED, and Figure 3a illustrates the case of using an LCD module that can check the relay model name, wiring state, and result.

A plurality of relays, etc. are installed in fields such as substations or switchboards, and when a specific cable is automatically diagnosed according to the spirit of the present invention, which device (relay) the specific cable was connected to is important information for automatic diagnosis. . In many cases, such as a relay installed in a field, it is difficult to automatically determine this with location information, etc., and it is realistic to receive input from an operator dispatched for failure analysis.

The control unit (130, 130-1) is to receive input from the operator which device (relay) the corresponding specific cable was connected to, for example, in FIG. 2A, two up/down buttons and a set/test The case of a reset button is exemplified, and in FIG. 3B, the case of an up, down, left, right, and confirmable selection switch is illustrated so that a model name can be selected on an LCD displaying a device list consisting of candidate relay model names.

In this case, the storage unit 160 stores a device list consisting of candidate relay model names (eg, relay models in Table 1), and when the output unit 180 reads the device list and displays it on the screen, The control unit 130 receives a device designation for a relay type as the first device from an operator among devices belonging to the device list displayed on the screen.

In another implementation, the control unit 130 may be applied as a touch screen as a pointing device capable of pointing to a point on a display screen or as a keyboard capable of directly inputting a device ID or model name.

The data input/output unit 170, as data related to the normal connection information from an external server such as a distribution system management server, includes a device list consisting of model names of candidate relays and a normal connection according to a combination of types of the first device and the second device. A wiring information list, field information to be inspected (eg, a list of installed relays), etc. may be received and stored in the storage unit 160 .

The data input/output unit 170 is a wired or wireless communication module that forms a wired or wireless data communication channel with the external server, or a USB that manually writes or reads data from the storage unit 160 by an operator. It can be a port module. Figure 2a illustrates the case of a USB port module. In this case, DB modification software for adding and deleting relays is separately developed to be provided as a communication port (USB) with a PC for updating so that the device can be updated. can

The attenuation checking unit 150 is for checking whether the function as a cable for signal transmission is degraded due to signal leakage or increased line resistance due to aging of the cable itself, even if the wiring of each unit line is normal. Since the connectors on one end and the other end of the cable are formed as RJ-45 ports identically to each other, meaningful attenuation checks can be performed even on target cables for which incorrect wiring checks are meaningless.

Depending on the implementation, the attenuation checking unit 150 may check not only signal attenuation but also delay. For example, one of the first coupling unit and the second coupling unit transmits a pilot pulse and the other one receives At the reception side, the weakening of the signal can be checked by the intensity weakening degree of the pilot pulse, and the delay can be checked from the phase difference between the pilot pulse on the transmitting side and the pilot pulse on the receiving side.

The power supply unit 190 may supply driving power to components that consume power (eg, a connection determination unit and an output unit) among the components of the automatic cable connection state checking device.

For example, the power supply unit 190 may supply power by charging an adapter and a built-in lithium ion battery (12V).

The connection determination unit 140 applies a signal to one end of each unit line and recognizes the unit line to which the signal is received from the other end. there is. Next, the connection determination unit 140 checks whether the checked connection relationship is the same as the normal connection information according to the type combination of the first device and the second device.

The wiring decision unit 140 and the attenuation check unit 150 perform a considerable level of arithmetic processing, in the form of an internal software module of one arithmetic hardware device (e.g., CPU) (represented by P in the drawing). It is advantageous to be implemented as For example, FIG. 3 shows an implementation having an input/output driver and a main board capable of determining a correct/wrong connection by reading a connector connection state and comparing the connection state of the connector with a stored DB in FIG. 3 .

5 is a flowchart illustrating an embodiment of a method for automatically checking a cable connection state performed by an apparatus for automatically checking a cable connection state according to the spirit of the present invention.

The illustrated method for automatically checking the cable connection state includes a device designation step (S120) of designating a type of at least one of a first device and a second device respectively connected to both ends of a cable to be checked (operator input is received); securing normal connection information according to the type specified in the device designation step (S140); confirming that connectors at both ends of the cable to be checked are fastened with an automatic inspection device (S150); checking whether each unit line constituting the cable to be checked is consistent with the normal connection information (S160); and outputting a result of checking whether or not the normal connection information matches (S190).

As shown, when matching is confirmed in the step of checking whether the normal connection information matches (S160), the degree of attenuation checking step of checking whether the degree of attenuation of the signal of each unit line is within a predetermined reference value (S180) may further include. Even in this case, if the wiring is wrong, there is no meaning in checking the signal attenuation, so the mismatch result is output immediately.

Depending on the implementation, the device designation step (S120) may include a device list output step of displaying a device list consisting of candidate relay model names on the display screen of the automatic cable connection state checking device; and an operator selection receiving step of receiving device designation for a relay type as the first device from an operator among devices belonging to the device list displayed on the screen. For example, the step S120 may be performed by selecting a relay type on the LCD window by using up, down, left, and right adjustment and an enter key inserted into the front of the device for automatically checking the cable connection state.

In the step of securing the normal connection information (S140), the automatic cable connection state check device receives from the external server in advance and stores it in the normal connection information list according to the type combination of the first device and the second device. Normal wiring information for the designated type can be searched and secured.

In the step of confirming the fastening (S150), it is confirmed that the operator dispatched to the field has completed connecting the connectors at both ends of the cable connecting the protection relay and the data collection device to the automatic cable connection state checking device.

In step S120, a relay model is selected, and in step S160, normal connection information and cable connection state of the selected model are mutually checked.

In the step of outputting the confirmation result (S190), unit lines that do not match the normal connection information among the unit lines constituting the cable to be checked may be displayed on the display screen of the automatic cable connection state inspection device. .

Alternatively, in the step of outputting the confirmation result (S190) or in the illustrated step S170, "OK" may be displayed on the display screen in the case of a correct wiring, and "Fail" in the case of an incorrect wiring.

Those skilled in the art to which the present invention pertains should understand that the embodiments described above are illustrative in all respects and not limiting, since the present invention can be embodied in other specific forms without changing the technical spirit or essential characteristics thereof. only do The scope of the present invention is indicated by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. .

110, 110-1: first fastening part
120, 120-1: second fastening part
130, 130-1: control panel
140: final decision unit
150: attenuation check unit
160: storage unit
180, 180-1: output unit
190: power supply

Claims (13)

a first fastening part and a second fastening part capable of respectively fastening one end connector and the other end connector of the cable to be checked;
a manipulation unit for receiving, from an operator, information on at least one of a first device connected to one end connector of the cable to be checked and a second device connected to the other end connector in a field;
Normal connection information is secured according to the type combination of the first device and the second device, and for each unit line constituting the cable to be checked connected to the first fastening part and the second fastening part, a wiring decision unit that checks whether or not the normal wiring information matches; and an output unit configured to output a result of checking whether the normal connection information is consistent with the cable connection state automatic checking device.
According to claim 1,
and a storage unit configured to store a normal connection information list composed of normal connection information according to a type combination of the first device and the second device.
According to claim 1,
Further comprising a storage unit for storing a list of devices,
When the output unit displays the device list on the screen,
The device of claim 1 , wherein the control unit receives device designation from an operator among devices belonging to the device list displayed on the screen.
According to claim 1,
The output unit displays on a screen a unit line that does not match the normal connection information among unit lines constituting the cable to be checked.
According to claim 1,
The cable connection state automatic checking device further comprises a data input/output unit for receiving data related to the normal connection information from an external server.
According to claim 1,
The cable connection state automatic inspection device further comprising an attenuation degree checking unit for checking whether the degree of attenuation of the signal of each unit line is within a predetermined reference value.
According to claim 1,
At least one of the first fastening part and the second fastening part,
A device for automatically checking a cable connection state having at least two or more different types of ports so that an operator can selectively connect them.
According to claim 1,
A power supply unit supplying driving power for the wiring determination unit and the output unit
Cable connection state automatic checking device further comprising a.
a device designation step of designating a type of at least one of a first device and a second device respectively connected to both ends of a cable to be checked;
securing normal connection information according to the type designated in the device designation step;
confirming that connectors at both ends of the cable to be checked are fastened with an automatic inspection device;
checking whether each unit line constituting the cable to be checked is consistent with the normal connection information; and
Outputting a result of checking whether the normal connection information is consistent with the normal connection information
A method for automatically checking the cable connection state including a.
According to claim 9,
Attenuation degree checking step of checking whether the degree of attenuation of the signal of each unit line is within a predetermined reference value
A method for automatically checking the cable connection state further comprising a.
According to claim 9,
In the device designation step,
A device list output step of displaying a device list consisting of candidate relay model names on the display screen of the automatic cable connection state checking device; and
An operator selection receiving step of receiving a device designation for a device type from an operator among devices belonging to the device list displayed on the screen.
A method for automatically checking the cable connection state including a.
According to claim 9,
In the step of securing the normal connection information,
A method for automatically checking a cable connection state by searching for and securing normal connection information for the designated type from a normal connection information list according to a type combination of the first device and the second device.
According to claim 9,
In the step of outputting the confirmation result,
A method for automatically checking a cable connection state of displaying on a screen a unit line that does not match the normal connection information among unit lines constituting the cable to be checked.

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