KR100864290B1 - Fault detecting system of leased line in remote monitoring and controlling system - Google Patents

Abstract

A system for detecting the fault of a leased line in a remote monitoring and controlling system is provided to enable only an RTU main communication line to be connected to a line checking device in a normal state and enable a communication line connected to the line checking device to be electrically separated from the line checking device to check the abnormality of the RTU and a communication error in the line checking device, thereby transmitting the abnormal state to a monitoring/controlling PC by remote and restoring the abnormal state quickly. A system for detecting the fault of a leased line in a remote monitoring and controlling system includes a monitoring/controlling PC(Personal Computer)(202), a business provider network of a remote monitoring line of an unmanned monitoring/controlling facility, an RTU(Remote Terminal Unit)(101), a line checking device(102), and a line switching device(103). The RTU is installed in the unmanned monitoring/controlling facility to communicate with the monitoring/controlling PC through the business provider network. The line checking device communicates with the RTU with respect to whether there is an error on a line, and communicates with the monitoring/controlling PC through the business provider network. The line switching device switches a line connection between the business provider network and the RTU or between the business provider network and the line checking device. The line switching device holds the line connection between the business provider network and the RTU in a normal state. The RTU transmits the abnormal signal of the line checking device to the monitoring/controlling PC when the line checking device detects an error.

Description

Fault detecting system of leased line in remote monitoring and controlling system

The present invention relates to a remote monitoring control system, and more particularly, to a failure detection system of a leased line applied to a remote monitoring control system.

Most remote monitoring lines of unmanned surveillance control facilities are leased to line operators.

In general, when there is a communication breakdown, it is necessary to call a facility operator to solve the problem.

Most communication failures are caused by lightning strikes, and communication modules such as modems and RTUs are mostly damaged by indirect effects flowing into the communication lines rather than by direct transmission.

Although the equipment is primarily protected by a surge protector, it is not 100% protected, so problems such as communication module failures, leased line problems, and RTU failures are detected and notified to check and take action.

Surge Arrester is a product that protects the equipment by flowing abnormal surges to earth through the ground. Sometimes.

In the event of an accident caused by lightning strikes, remote monitoring without interruption is necessary, but the conventional method of detecting a failure of a leased line for a remote monitoring control system has been a costly or inefficient management system.

SUMMARY OF THE INVENTION An object of the present invention for solving the above-mentioned problems is to provide a line check device and a line conversion device between a remote terminal device and a leased line to remotely perform a line test at the property branch boundary to realize fast recovery.

In addition, the leased line has a main line and an auxiliary line so that the main line can be promptly repaired if the main line is abnormal, and at the same time, the main line is abnormal for the inspection and restoration and the seamless remote monitoring is possible. The purpose is to operate the circuit.

Lease line failure detection system of the remote monitoring control system according to the present invention for solving the above problems, the monitoring control PC; Operator communication network of remote monitoring line of unmanned surveillance control facility; A remote terminal unit (RTU) installed in the unmanned surveillance control facility and communicating with the surveillance control PC through the operator communication network; A line checking device which communicates the remote terminal device with an abnormality and communicates with the monitoring and control PC through the operator communication network; And a circuit conversion device for converting a line connection between the operator communication network and the remote terminal device or the operator communication network and the line checking device.

Here, the line conversion device maintains the line of the operator communication network and the remote terminal device in the normal state, and when the line checking device is abnormal, the remote terminal device transmits an abnormal signal of the line checking device to the monitoring and control PC. It is characterized by that.

Here, in the event of an abnormality of the remote terminal device, converting the line between the operator communication network and the line checking device through the line converting device, and transmitting the abnormal signal of the remote terminal device from the line checking device to the monitoring and controlling PC. It is made by features.

Here, the line conversion device is preferably installed between the communication module of the remote terminal device and the modem which is the branch operator property branch of the operator communication network.

In addition, the lease line failure detection system of the remote monitoring control system according to the present invention, the monitoring control PC; A first operator communication network of a remote monitoring main line of an unmanned surveillance control facility; A second operator communication network of a remote monitoring auxiliary line of the unmanned monitoring control facility; A remote terminal unit (RTU) installed in the unmanned surveillance control facility and communicating with the surveillance control PC through the first or second operator communication network; A line checking device which communicates with the remote terminal device whether there is an error, and communicates with the monitoring control PC through the first or second operator communication network; A first line conversion device for converting a line connection between said first operator communication network and a remote terminal device or said first operator communication network and a line checking device; And a second circuit conversion device for converting a line connection between the second operator communication network and the remote terminal device or the second operator communication network and the line checking device.

Here, the first and second line converters maintain a line between the first and second operator communication networks and the remote terminal device, respectively, during normal operation, and the remote terminal device is the line in case of abnormality of the line checking device. The abnormality signal of the inspection apparatus is transmitted to the monitoring control PC.

Here, in the event of an abnormality of the remote terminal device, the line between the first operator communication network and the line checking device is changed through the first line converting device, and the abnormal signal of the remote terminal device from the line checking device to the monitoring and controlling PC. It is characterized in that for transmitting.

Here, when the abnormal signal of the remote terminal apparatus is not transmitted through the first operator communication network, the line checking apparatus converts a line between the second operator communication network and the line checking apparatus through the second line converter. And transmitting an abnormal signal between the remote terminal device and the first operator communication network from the line checking device to the monitoring control PC.

According to the above-described configuration of the present invention, normally only the RTU main communication line is connected, and the communication line connected to the line checking device can be electrically disconnected and protected in the event of a surge, so that the line checking device in case of an RTU abnormality or communication error can be protected. It can be checked and sent to the remote monitoring PC for quick recovery.

Hereinafter, with reference to the accompanying drawings looks at the structure, operation and effect of the lease line failure detection system of the remote monitoring control system according to the present invention.

1 is a block diagram of a leased line failure detection system of a remote monitoring and control system according to an embodiment of the present invention.

As shown, the lease line failure detection system includes a remote terminal device 101, a line inspection device 102, a circuit conversion device 103, a carrier communication network 201 and a monitoring control PC (202).

The remote terminal device 101 is a remote terminal, which is installed at a remote location and transmits data such as measurement data of an unattended monitoring control object, presence or absence of an abnormality and status of a facility, or receives a control signal from the monitoring control PC 202.

The line checking device 102 is connected by a communication line to communicate with the remote terminal device 101 and can check whether there is an abnormality in the communication port of the remote terminal device 101 and a line abnormality in the operator communication network 201. Device.

The line conversion device 103 may connect the line of the operator communication network 201 with the remote terminal device 101 or the line checking device 102 by the command of the remote terminal device 101 or the line checking device 102. As a device for converting a line of the operator communication network 201, it is preferable to be installed between the remote terminal device 101 and the modem which is the line operator property branch point.

The operator communication network 201 is a wired / wireless communication network, and in the free surveillance control system, it is common to establish a communication network through a lease line, but it is natural that the present invention can be applied even when the lease line is not. The supervisory control PC 202 is a personal computer located in a management room or a control room and receives management and measurement data from an object of unmanned surveillance control and transmits a control signal. In the present invention, the port of the remote terminal device 101 is provided. It holds the function of receiving and managing the signal of the presence or absence of abnormality and the line abnormality of the operator communication network (201).

2 is a block diagram of a leased line failure detection system of a remote monitoring and control system according to another embodiment of the present invention.

Another embodiment of the present invention shown in FIG. 2 compares the operator communication network 201 with the first operator communication network 201a of the main line and the second operator communication network of the auxiliary line in comparison with the embodiment of the present invention shown in FIG. 1. 201b and the first line converter 103a and the second line converter 104 connected in parallel to each of the first operator network 201a and the second operator communication network 201b in parallel. Each configuration is identical.

As shown in Figure 2, the lease line failure detection system according to another embodiment of the present invention is a remote terminal device 101, the line check device 102, the first line conversion device (103a), the second line conversion device 104, a first operator communication network 201a, a second operator communication network 201b, and a supervisory control PC 202, and the functions of the respective components are the same as those shown in FIG. The description of the components is omitted.

The line conversion devices 103a and 104 are installed between the communication module of the remote terminal device 101 and the modems 201a and 201b, which are branch line properties of the network operator, and communicate with the auxiliary line when the main line is abnormal due to the redundant configuration of the lines. Be able to be informed of the status of the main line.

Hereinafter, the operation sequence of the leased line failure detection system shown in Figs. 1 and 2 will be described with reference to Figs.

FIG. 3 is a flowchart illustrating a line check procedure when an error occurs in the remote terminal device (RTU) shown in FIG. 1.

The remote terminal 101 and the line checking device 102 communicate with each other whether there is an error, and when the remote terminal device 101 has an abnormality, a line converting command is sent to the line converting device 103 using the line checking device 102. The remote terminal 101 transmits to the supervisory control PC 202 via the operator communication network 201. In addition, even when the line checking device 102 has an abnormality, the remote terminal device 101 can transmit the abnormal signal of the line checking device 102 to the monitoring control PC 202 via the operator communication network 201.

If a communication failure occurs, it may be caused by an error in the communication port of the remote terminal device 101 or an abnormality in the operator communication network 201 line. Therefore, if the remote terminal device 101 has a problem according to the following operation procedure, You can check if there is a problem or if both the remote device and the line have a problem.

When a communication breakdown occurs, the remote terminal device 101 issues a switching command to cause the line conversion device 103 to convert the line to the line checking device 102 (S311, S312) or to the line checking device 102. The abnormal signal is transmitted (S311, S317).

When the line conversion command is received by the remote terminal device 101, the line conversion device 103 connects the line to the line check device 102 and the operator communication network 201 to perform communication (S313).

The monitoring control PC 202 determines whether communication is normally performed or whether a communication error has occurred (S314).

If communication is normally performed, it is determined that there is an abnormality in the remote terminal apparatus 101 without an abnormality occurring on the line of the operator communication network 202, and a request is made to the remote terminal apparatus 101 contractor for repair (S315).

If an error occurs in the communication (for example, when there is no response for a predetermined time in the communication error operation), the circuit is reported to have occurred and a request is made to the circuit operator for repair (S316).

Next, when the line checking device 102 receives the abnormal signal of the remote terminal device 101, the line checking device 102 causes the line converting device 103 to convert the line (S318) and the line checking device 102. ) And the communication line between the operator communication network 201 and the normal communication with the monitoring and control PC 202, the monitoring and control PC 202 determines that the remote terminal device 101 is abnormal and requests repair (S314, S315). If the communication is abnormal, it is determined that the line is abnormal and requests repair (S314, S316).

In addition, the supervisory control PC 202 determines that the leased line and the remote terminal device 101 are abnormal when there is no response for a predetermined time in the line communication abnormal operation between the line checking device S317 and the operator communication network 202. The operator and the remote terminal device 101 request a repair (S319).

FIG. 4 is a flowchart for explaining a line checking procedure when an error occurs in the remote terminal shown in FIG. 2, and FIG. 5 illustrates a port and line checking procedure of the line checking device in checking the port of the remote terminal shown in FIG. It is a flowchart for doing so.

The remote terminal device 101 and the line checking device 102 exchange abnormalities with each other, and when the communication port of the remote terminal device 101 is abnormal, the switching command to the line conversion device 103a is performed using the line checking device 102. The remote terminal device 101 transmits to the supervisory control PC 202 that it is not normal.

When the remote terminal device 101 leases and uses the first operator communication network 201a and the second operator communication network 201b by using communication ports 1 and 2 or communication modules 1 and 2, as shown in FIG. ) Checks the first operator communication network (201a), the second operator communication network (201b) in the order shown in Figure 4, and selects a line that can be used normally "abnormal terminal device 101" and " And the line status of the first and second operator communication networks 201a and 201b.

If there is a problem with the two leased lines, it is indicated as a communication error on the remote remote monitoring PC 202, and if there is no response within a certain time, it is regarded as an error in the whole system and notified to the "line operator" and the "equipment company". A maintenance team can be dispatched to the site for inspection.

Of course, even when the line check apparatus 102 is abnormal, it can transmit to the monitoring control PC 202 that the remote terminal apparatus 101 is not normal.

With reference to Figure 4 looks at the operation sequence of the lease line failure detection system.

First, when the line checking device 102 receives the abnormality of the remote terminal device 101, the line checking device 102 causes the first line converting device 103a to convert the line through the port 1 and monitor and control the remote control. Communicate with the PC 202 (S411).

The monitoring control PC 202 determines whether communication is normally performed (S412).

If the communication is normally performed, there is no problem with the line, so the remote terminal device 101 determines that an abnormality has occurred and makes a request for repair to the equipment supplier (S413). 1) is performed again to allow the first line conversion apparatus 103a to maintain the line on the remote terminal apparatus 101 and the first operator communication network 201a (S414).

Returning to S412 again, if communication is not normally performed, the line checking device 102 executes the line conversion command 2 to perform communication between the port 2 and the monitoring control PC 202 (S415).

If communication is normally performed after performing the communication, the monitoring and control PC 202 determines the abnormality of the remote terminal device 101 and the first operator communication network 201a and requests a repair to the equipment company and the line service company (S417).

Subsequently, when the recovery is completed, the line checking device 102 executes the line switching command (1) (2) to perform the line conversion to the remote terminal device (101) (S418).

Returning to S416, if communication is not normally performed, the monitoring and control PC 202 determines that the remote terminal device 101, the first operator communication network 201a, and the second operator communication network 201b are all abnormal. Request a repair to the facility company and the line service company (S419), and when the repair is completed, the line checking device 102 executes the line conversion command (1) (2) to perform the line conversion to the remote terminal device (101). (S418).

Next, referring to FIG. 5, a line checking flowchart when the line checking device 102 receives a line checking request from the remote terminal 101 when a communication breakdown of a line occurs. FIG. 5A illustrates a case where a line check request is made between port 1 of the remote terminal apparatus 101 and the first operator communication network 201a, and FIG. 5B illustrates a line check of port 2 of the remote terminal apparatus 101 and the second operator communication network 201b. Flowchart when there is a request.

Referring to FIG. 5A, when a port check request is received from the remote terminal device 101 when a port1 error occurs in the remote terminal device 101, the line checking device 102 receives a second line through the port1 of the line checking device 102. The line conversion device 104 causes the line conversion to communicate with the monitoring and control PC 202 remotely (S511).

The monitoring control PC 202 determines whether or not the communication is normal (S512). If the communication is normally performed, it is determined that the port1 of the remote monitoring apparatus 101 is abnormal, and requests a repair to the equipment company (S513).

If it is determined that the communication is abnormal, the monitoring and control PC 202 determines that there is a problem with the leased line of the first operator communication network 201a, and performs a service request to the first operator (operator A) (S515).

When the recovery after step S513 or S515 is completed, the line checking device 102 performs a line conversion command 1 to convert the port 1 of the remote terminal device 101 to the line of the first operator communication network (S514). .

Referring to FIG. 5B, when a port check request is received from the remote terminal device 101 when an abnormal port2 of the remote terminal device 101 occurs, the line checking device 102 receives a line check through the port 1 of the line checking device 102. The two-line conversion device 104 performs a line conversion to communicate with the monitoring control PC 202 remotely (S521).

The supervisory control PC 202 determines whether the communication is normal (S522). If the communication is normally performed, it is determined that the port 2 of the remote monitoring apparatus 101 is abnormal, and requests a repair to the facility company (S523).

If it is determined that the communication is abnormal, the monitoring and control PC 202 determines that there is a problem with the leased line of the second operator communication network 201b, and performs a service request to the second operator (Company B) (S525).

When the recovery after step S523 or S525 is completed, the line checking device 102 performs a line conversion command 2 to convert the port 2 of the remote terminal device 101 to the line of the second operator communication network (S524). .

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the above-described technical configuration of the present invention may be embodied by those skilled in the art to which the present invention pertains without changing its technical spirit or essential features of the present invention. It will be appreciated that the present invention may be practiced as. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

1 is a block diagram of a leased line failure detection system of a remote monitoring and control system according to an embodiment of the present invention.

2 is a block diagram of a leased line failure detection system of a remote monitoring and control system according to another embodiment of the present invention.

FIG. 3 is a flowchart illustrating a line check procedure when an error occurs in the remote terminal device (RTU) shown in FIG. 1.

FIG. 4 is a flowchart illustrating a line inspection procedure when an error occurs in the remote terminal shown in FIG. 2.

FIG. 5 is a flowchart for explaining a port and a line checking procedure of a line checking device when checking a port of a remote terminal device shown in FIG.

Claims (8)

A supervisory control PC; Operator communication network of remote monitoring line of unmanned surveillance control facility; A remote terminal unit (RTU) installed in the unmanned surveillance control facility and communicating with the surveillance control PC through the operator communication network; A line checking device which communicates the remote terminal device with an abnormality and communicates with the monitoring and control PC through the operator communication network; And a circuit conversion device for converting a line connection between the operator communication network and the remote terminal device or the operator communication network and the line checking device. The line converter maintains the line between the operator communication network and the remote terminal device in normal operation, And the remote terminal device transmits an abnormal signal of the line checking device to the monitoring and controlling PC when the line checking device is abnormal. delete The method of claim 1, In the event of an abnormality of the remote terminal device, a remote monitoring unit converts a line between the operator communication network and the line checking device through the line converting device and transmits an abnormal signal of the remote terminal device from the line checking device to the monitoring and controlling PC. Lease line failure detection system of control system. The method of claim 1, And the line conversion device is installed between a communication module of the remote terminal device and a modem which is a line operator property branch point of the operator communication network. A supervisory control PC; A first operator communication network of a remote monitoring main line of an unmanned surveillance control facility; A second operator communication network of a remote monitoring auxiliary line of the unmanned monitoring control facility; A remote terminal unit (RTU) installed in the unmanned surveillance control facility and communicating with the surveillance control PC through the first or second operator communication network; A line checking device which communicates with the remote terminal device whether there is an error, and communicates with the monitoring control PC through the first or second operator communication network; A first line conversion device for converting a line connection between said first operator communication network and a remote terminal device or said first operator communication network and a line checking device; And a second circuit conversion device for converting a line connection between the second operator communication network and the remote terminal device or the second operator communication network and the line checking device. The first and second line converters maintain a line between the first and second operator communication networks and the remote terminal device, respectively, in normal operation. And the remote terminal device transmits an abnormal signal of the line checking device to the monitoring and controlling PC when the line checking device is abnormal. delete The method of claim 5, In case of abnormality of the remote terminal device, a line is converted between the first operator communication network and a line checking device through the first line converting device, and an abnormal signal of the remote terminal device is transmitted from the line checking device to the monitoring and control PC. Leakage line failure detection system of a remote monitoring control system. The method of claim 7, wherein When the abnormal signal of the remote terminal apparatus is not transmitted through the first operator communication network, the line checking apparatus converts a line between the second operator communication network and a line checking apparatus through the second line converter and converts the line. A rental line failure detection system of a remote monitoring control system, which transmits an abnormal signal between the remote terminal device and a first operator communication network from an inspection device to the monitoring control PC.

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