KR101644013B1 - Apparatus of detecting trouble state on power station with checking frame ground level 1n power supply for remote monitoring system - Google Patents

Abstract

The present invention relates to a failure detection apparatus using a frame ground level of a power supply unit for a remote terminal unit (RTU) of a power facility. The failure detection apparatus monitors the frame ground level of the power supply unit supplying operating power to each functional unit of the RTU which remotely controls and monitors the operating state of the power facility transmitting or distributing high-voltage power to estimate or detect the occurrence of failures in the corresponding power facility for power distribution or transmission when the detected level exceeds an allowed range. The failure detection apparatus includes: a frame ground level setting unit which sets an intermediate level of a voltage supplied to the RTU from a terminal board device to output a frame ground voltage level value to the terminal board device; an opening and closing switch unit which is installed between the frame ground level setting unit and the terminal board device to apply the set frame ground voltage level value to the terminal board device or block the set frame ground voltage level value from the terminal board device; and a failure detection device which inputs the frame ground voltage level value from the terminal board device, records and stores the input frame ground voltage level value to an allocated memory area, compares the frame ground voltage level value with a voltage level value recorded and stored in a table unit to check whether the frame ground voltage level value corresponds to the voltage level value in an allowed range of a normal operation, power failure, ground contact failure, or mixed contact failure as well as analyzing a connection location signal in a detected track and searching information recorded and stored in the table unit to check a failure occurrence location.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure detection apparatus using a frame ground level,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a fault detection apparatus using a frame ground level of a power supply unit for a remote facility in an electric power facility, and more particularly to a fault detection apparatus using a frame ground level for remotely controlling an operation state of a power facility for transmitting / Monitor the frame ground level of the power supply that supplies the operating power to each function of the monitoring remote unit (RTU), and if a level outside the allowed range is detected, it can be guessed or judged that the power supply of the transmission / To a fault detection apparatus using a frame ground level.

Electricity generated by the power plant is transformed to an extra-high voltage of 154 KV or more and transmitted and distributed through a transmission line installed in a steel tower. Substation is transformed to a high voltage of less than 154 KV and distributed to a substation near a customer including factory or residence. And is distributed to the final customer. Since the electric power to be delivered and transmitted is high voltage and high current and is composed of trunk line and branch line, it is important to accurately check the state or position of a fault at a specific point and perform its function in a remote terminal unit (RTU) . The present invention relates to a device for detecting and analyzing a frame grand voltage level of a functional unit for supplying operating power to each function of a remote unit (RTU) to detect a fault occurrence state.

Power facilities installed to distribute electricity may include steel towers, electric poles, transmission and distribution lines, substations, transformers, switches, breakers, and leakers.

In the following description, the electric power facility and the electric power facility have the same meaning and are selectively used in accordance with the context.

On the other hand, the operating personnel, maintenance personnel, and maintenance personnel who check the normal operation of the power facilities must be skilled technicians and the number of electric power facilities and the capacity of the electric power supplied with the electric power demand increase, More technicians are needed. In addition, in order to reduce the operation cost of the electric power facilities, the number of people who are in the substation is reduced or eliminated. In the case of various types of accidents (failures) in such a large-capacity electric power facility, the ripple effects are spread widely and economic losses due to accidents (failures) can be exceeded. Therefore, There is a need to develop a technology that ensures the operational safety of a remote unit (RTU) that monitors and controls the occurrence of faults in the system.

As the size and complexity of electric power facilities have increased recently, it has become more necessary to secure the safety of technologies for monitoring and controlling electric power facilities. The scale and number of electric power facilities that monitor and control power devices in the field are increasing due to the expansion of new electric power facilities and the connection to remote control units (RTU). Here, the remote control device is described as a system that enables unattended operation of the electric power facility. Specifically, the remote unit (RTU) informs the state of the on-site electric power facility to a remote SCADA system and receives the corresponding control command from the SCADA system to control the electric power facility in the field can do. That is, the SCADA system is a remote automatic control system, and the remote subunit (RTU) controls the electric power facilities installed on the site by the corresponding control commands of the SCADA system, detects the operation state of the electric power facilities, As shown in FIG.

The remote control unit (RTU) monitors, controls, and checks for abnormalities or failures using repeated verification and a variety of built-in techniques for safe operation of the field power facility.

However, in case of changing or reconnecting the wiring of the terminal board due to new installation, replacement, expansion, replacement, maintenance, etc. of the remote substation device, the wiring fault problem may often occur due to various reasons. And if the power supplied to the customer is not stable, there is a problem that the stable operation of the power equipment and the power supply are not smooth.

As a conventional technique for partially solving such a problem, a "Scada system remote event event occurrence test apparatus" according to Korean Patent Registration No. 10-1186754 (2012.09.21.) Is proposed.

Korean Patent Registration No. 10-1186754 (2012.09.21.), "Scada System Remote Slave Event Event Tester"

In order to solve the problems and necessities of the prior art as described above, the present invention provides a system and method for receiving a control signal of a scada system, A power supply for a power facility remote small and medium power supply unit for detecting and analyzing a ground voltage level value in real time to display a normal operation, a power failure, a ground fault, That is the purpose.

In order to solve the problems and necessities of the prior art as described above, the present invention has been developed in order to solve the above problems of the related art by providing a terminal unit of a terminal board provided in a remote unit to which a cable for transmitting or receiving various signals is connected to a power facility A power supply for remote power supply that can analyze the frame ground level signal detected by the real-time monitoring, notify the manager of the analyzed result, and determine the generated power failure, ground fault, And it is an object of the present invention to provide a fault detection apparatus using a supply frame ground level.

According to an aspect of the present invention, there is provided a failure detection apparatus using a frame ground level of a power supply unit for a remote control apparatus of a power facility, A power supply for a remote control device connected to a terminal board device for supplying an operating voltage to a remote control device for controlling and monitoring the facility and detecting a fault condition of the power equipment. The fault detection device using the frame ground level, A frame ground level setting unit for setting an intermediate level of a voltage supplied from the device to the remotely operated device and outputting the frame level voltage value to the terminal board device; An open / close switch unit installed between the frame ground level setting unit and the terminal board device to apply or block the output value of the frame ground voltage level to the terminal board device; And a controller for receiving the frame ground voltage level value from the terminal board device and storing the value in a memory area allocated to the terminal board device and comparing the value with a voltage level value recorded in the table part, And a voltage level value, analyzes a connection position signal of the detected line, and searches the information recorded and stored in the table unit to identify a fault occurrence position. . ≪ / RTI >

A terminal board control unit for detecting a level of a voltage applied from the frame ground level setting unit, transmitting a detected frame ground voltage level value in connection with the failure detection device, and receiving a failure status confirmation signal; A display unit for displaying a normal operation, a power failure, a grounding fault, a blind trouble, and a fault occurrence position visually by a control signal of the terminal board control unit; And an initialization button unit connected to the terminal board control unit and receiving an initialization display command signal so that a display signal output to the display unit displays a normal operation state; . ≪ / RTI >

Wherein the fault detection device comprises: an analysis unit connected to the terminal board device and inputting a detected frame ground voltage level value; A measuring unit connected to the analyzing unit and receiving the frame ground voltage level value and detecting the level of the voltage; And a table unit connected to the analysis unit and comparing the voltage level value detected by the measurement unit with a voltage level recorded and stored to search for whether the voltage level corresponds to a normal operation, a power failure, a ground fault, or a blind trouble; The analyzing unit analyzes the signal input from the table unit and classifies the input signal into one of a normal operation, a power failure, a grounding fault, and a blindness failure, records the fault in an analysis frame, and transmits the fault analysis frame to the terminal board device Lt; / RTI >

The failure detection device receives the terminal serial number information on which the frame ground voltage level value is detected from the terminal board device and searches for the location information of the power equipment recorded and stored in correspondence with the terminal serial number in the table portion, Information is recorded in the failure analysis frame.

Wherein the failure analysis frame includes a start signal of a three-word field in which a position signal at which the failure analysis frame starts and a total number of bits of information recorded in the failure analysis frame are recorded by a corresponding control signal of the analysis unit, ; A normal operation field of 4 words arranged at the next sequential position of the start field and in which the normal operation of the electric power facility is recorded by the corresponding control signal of the analysis unit; A 4-word power failure field disposed at the next sequential position in the normal operation field and in which power failure of the power facility is recorded by a corresponding control signal of the analyzer; A four-word ground fault field located at the next sequential position in the power supply fault field and in which the ground fault of the power plant is recorded by the corresponding control signal of the analysis unit; A four-word coherence failure field disposed at the next sequential position in the ground fault field and in which a blinking failure of the power facility is recorded by a corresponding control signal of the analysis unit; A 4-word fault location field disposed at a next sequential position of the mixed-signal fault field and in which a fault location of the power plant is recorded by a corresponding control signal of the analysis unit; Checks whether all bit numbers recorded in the fault analysis frame are correct, checks whether a transmission error is included, analyzes the error information by a CRC check method, and if a transmission error is included, A 4-word error check field in which a program for generating a retransmission request signal is recorded by a corresponding control signal of the analyzer if the possible error is corrected and correction is impossible; And an end field of three words arranged at a next sequential position of the error check field and in which a signal for ending the failure analysis frame is recorded by a corresponding control signal of the analysis unit; . ≪ / RTI >

The word of the fault analysis frame is formed in units of 25 bytes, and the byte can be formed in units of 11 bits.

The analysis unit may repeat the fault analysis frame three times per second and transmit the fault analysis frame to the terminal board device.

According to the present invention having the above-described structure, the frame ground voltage level value of the operation power supplied to the remotely controlled equipment can be detected and analyzed in real time to check the normal operation, power failure, grounding fault, There is an advantage.

The present invention having the above-described configuration has an advantage of preventing measurement, monitoring, and control errors that can occur due to a connection error failure of a connection line connecting a remote substation device and a power facility.

In addition, according to the present invention, if an occurrence of a ground fault, a power fault, or a confusion fault is detected, the analyzed fault or error information is transmitted to the terminal board for display so that the fault condition can be quickly and accurately checked, The regular maintenance and maintenance system is regularly maintained and established, which enhances the reliability and reliability of the power supply system.

1 is a functional block diagram illustrating a terminal board according to an embodiment of the present invention;
2 is a functional block diagram illustrating a fault detection apparatus according to an embodiment of the present invention.
3 is a perspective view illustrating a state in which a terminal board and a fault detection device are connected to each other according to an embodiment of the present invention;
FIG. 4 to FIG. 8 are explanatory diagrams of a signal flow concept for detecting a failure of a power facility in a fault detection apparatus according to an embodiment of the present invention;
9 is a flowchart illustrating a method for explaining a method for detecting a fault according to an embodiment of the present invention.
10 and 11 are graphs for explaining steps S140, S160 and S180 in the fault detection method according to an embodiment of the present invention,
FIG. 12 is a functional block diagram illustrating a fault detection apparatus using a frame ground level of a power supply unit for a remote facility in a power facility according to an embodiment of the present invention. FIG.
FIG. 13 is a diagram illustrating a connection state of a terminal board device and a failure detection device according to an exemplary embodiment of the present invention. FIG.
14 is a field configuration diagram for explaining field arrangement of a fault analysis frame according to an embodiment of the present invention;
And
15 is a functional block diagram illustrating a terminal board according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. The detailed description of known functions and configurations that may obscure the subject matter of the present invention will be omitted, and the shape and size of each element in the drawings may be exaggerated for clarity.

In the following description, equipments and facilities are the same meaning, and the operator and the user are the same, and they are selectively used in accordance with the context.

FIG. 1 is a functional block diagram illustrating a terminal board according to an embodiment of the present invention. FIG. 2 is a functional block diagram illustrating a fault detection apparatus according to an embodiment of the present invention. 4 to 8 are perspective views illustrating a state in which a terminal board and a fault detection apparatus according to an embodiment are connected to each other. FIG. 9 is a flowchart illustrating a method of explaining a fault detection method according to an embodiment of the present invention. FIG. 10 and FIG. 11 show an example of the fault detection method according to an embodiment of the present invention. , Step S180 of FIG.

The present invention relates to a SCADA (Supervisory Control and Data Acquisition) system and a fault detection device connected to a terminal board of a remote substation connected between power facilities, A measuring unit for measuring a state signal of a signal connecting line connecting the apparatus; And an analyzer for determining an abnormality with respect to the signal connecting line by comparing an input and a returned voltage value between the terminal board and the remote slave device with respect to the signal connecting line.

In addition, when the abnormality is detected, the analyzing unit may determine whether the terminal board is connected to the abnormal power supply unit and generate a power failure notification signal if it is determined that the terminal board is connected to the abnormal power supply unit. In addition, when the abnormality is detected, the analysis unit may determine whether the signal connection lines are connected to the facility frame or the ground ground, and generate the ground fault alarm signal if it is determined that the signal connection lines are connected to the facility frame or the earth ground.

In addition, the analyzing unit may determine whether or not the signal connection lines are interlocked with each other when the abnormality is detected, and may generate the interception notification signal if it is determined that the signal connection lines are interlocked. In addition, the analyzing unit may determine whether or not the signal connection lines are interlocked with each other when the abnormality is detected, and may generate the interception notification signal if it is determined that the signal connection lines are interlocked.

In addition, when the state of the power facility monitoring and control contact is OFF, the voltage measured through the signal connection lines is out of the state OFF normal range, and when the state of the power facility monitoring and control contact is ON, The time when the voltage value measured through the signal connection lines deviates from the ON state normal range or when the state of the power facility monitoring and control contact is changed from OFF to ON or from ON to OFF, When the state stabilization time t1 is exceeded, it can be judged that power supply abnormality or tangency has occurred. In addition, the analyzer can determine that there is a problem when a voltage value measured through the signal connection lines exists between the state ON normal range and the state OFF normal range.

In order to solve the above problems, a fault detection method connected to a terminal board of a remote sub-apparatus connected between the SCADA system and power facilities of the present invention, Measuring a status signal of a signal connection line connecting the remote control unit and the remote control unit; Comparing, by the analysis unit, the input and returned voltage values between the terminal board and the remote subsystem for the signal connection line; And determining whether the signal connection line is abnormal based on a comparison result of the input and the returned voltage value by the analysis unit.

According to another aspect of the present invention, there is provided a fault detection method comprising the steps of: determining whether the terminal board is connected to an abnormal power supply when an abnormality is detected; And generating a power failure notification signal when it is determined that the terminal board is connected to the abnormal power supply apparatus. According to another aspect of the present invention, there is provided a fault detection method comprising the steps of: determining whether the signal connection lines are connected to a facility frame or ground; And generating a ground fault notification signal when it is determined that the signal connection lines are connected to the equipment frame or the ground ground.

According to another aspect of the present invention, there is provided a fault detection method comprising the steps of: determining whether a signal is interrupted between signal connection lines when an abnormality is detected; The method may further include generating a signal for generating a signal to interfere with the signal when the signal connection lines are determined to be interrupted. According to another aspect of the present invention, there is provided a method for detecting a fault,

The failure detecting device 90 using the frame ground level of the power supply for the power supply remote control device of the power equipment remote control apparatus 100 includes the terminal board device 100, the failure detecting device 200, the remote device 400 ), A scada (500), and a power facility (600).

The electric power facility 600 may cause relocation, relocation, expansion, new construction, maintenance and the like due to an increase or fluctuation of electric power demand. In addition, relocation, transfer, expansion, Repair or maintenance may occur.

In the case where relocation, transfer, extension, new installation, maintenance, or the like of the remote slaughterhouse 400 occurs, the terminal board connected to the line for supplying the operation power to the remote slaughterhouse 400 and transmitting the corresponding signal must be installed again , The line connected to the terminal board may be erroneously connected in this process.

(RTU) does not have the function of detecting or detecting the cause of the operation error of the field power facility (facility), and therefore, there is a malfunction in the power facility of the site due to a wiring error in the wiring of the terminal board device (Administrator, user) could not confirm the wiring error status before the actual operation (malfunction) actually occurred.

That is, in the past, when there is a malfunction due to a mistake of a maintenance worker or an operator, there is no function to detect (detect) a problem that causes an operation error of the RTU, The user was not able to judge the normal operation of the power equipment and the safety before confirming the problem of the connection error due to the malfunction of the power equipment.

Accordingly, the present invention solves this problem, and the failure detection device 200 connected to the terminal board device 100 monitors the frame ground level of the power plant remote unit (RTU), so that the failure of the remote unit (RTU) (Abnormality) occurs, and visually displays the analyzed fault state when detecting the occurrence of the fault (abnormality), so that the user can know.

Hereinafter, the terminal board device 100, the failure detection device 200, and the failure detection method according to the embodiment of the present invention will be described.

The fault detecting apparatus 200 judges whether or not the normal operation of the corresponding power plant remotely connected to the terminal board apparatus 100 is based on the detected voltage level analysis of the frame ground, If the analysis is determined, the fault status is displayed and outputted so that the operator can confirm it.

The terminal board device 100 may include a display unit 110, a terminal board control unit 140, and one or more connection units 102, 103, 106, 111, and 112.

The display unit 110 visually displays the failure alarm signal generated and received by the failure detection device 200 to notify the operator of the failure (abnormality).

Hereinafter, the operator is described as including an administrator and a user. In addition, trouble and anomalies have the same meaning, and they are used selectively in accordance with the context, and detection, detection, and detection have the same meaning and are selectively used in accordance with the context.

The fault detection device 200 detects and analyzes the frame ground voltage level value detected from the connection line connected to the power plant remote unit (RTU), so that failure of the power plant remote unit (RTU) or wiring connection abnormality The fault location can be confirmed by analyzing the location of the connected line.

The earth ground of the circuit consisting of electricity and electrons is 0 volts (V), and the voltage level of the operating power source may be different according to the design of the circuit, and will be described as 48 volts (V) The polarity of the operating voltage may be either positive (+) or minus (-).

Hereinafter, 24 volts, which is an intermediate level between the ground potential of 0 volts and the operation voltage potential of 48 volts, will be described as a frame ground voltage level value.

 When the electric and electronic circuits normally operate (operate), the voltage value of the frame ground level is maintained within a predetermined range or allowed range. If the circuit operates abnormally, an abnormal value exceeding the allowable constant range is detected.

The technical idea of the present invention is to detect and analyze the voltage level value of the frame ground in real time to find the location or facility where the fault has occurred.

The terminal board control unit 140 of the terminal board device 100 receiving the control signal of the analysis unit 220 installed in the failure detection device 200 controls the display unit 110 to determine whether a failure has occurred, Segment 105 and at least one or more LEDs so as to be visually confirmed.

As shown in FIG. 1, the display unit 110 may include a 7-segment 105 and one or more LEDs.

That is, the analysis unit 220 of the failure detection apparatus 200 inputs and analyzes the frame ground level values detected and collected from the first remote device signal connection unit 111 and the second remote device signal connection unit 112, Segment 105 of the display unit 110 so that the operator (administrator) can visually confirm whether or not the display unit 110 is operating.

Meanwhile, the analysis unit 220 can visually display the type of the fault, that is, the power failure, the ground fault, and the occurrence of the blind trouble, by the lighting position of the LED constituting the display unit 110. [

In addition, the display unit 110 may include an initialization button. When an alarm of a fault (abnormal) condition is displayed, a worker (operator, manager, manager) .

Although the display unit 110 includes the seven-segment LED 105 and a plurality of LEDs, various display devices such as an LCD and an O-LED may be selectively used. The terminal board device 100 may be installed separately from the terminal board device 100 or may be a mother board and a daughter board board and connected to the terminal board device 100 in a state of being mounted.

The failure analysis signal input connection unit 101 may be configured to detect a state signal or a frame ground level value detected from a corresponding line connected to a power plant remote unit (RTU) And transmits it to the detecting apparatus 200. [

The corresponding RTU installed in the field is connected to the first remote unit signal connection unit 111 and the second remote unit signal connection unit 112 via a corresponding line (connection line).

The fault analysis result output connection unit 106 transmits a signal applied from the analysis unit 220 of the fault detection device 200 to the terminal board control unit 140 of the terminal board device 100, And a result of analyzing the ground level value is displayed on the display unit 110 as a transmission path of the corresponding information signal.

In addition, although the fault analysis signal input connection unit 101 and the fault analysis result output connection unit 106 are shown as being separated from each other in the drawing, it is only an embodiment, and it is also possible to simultaneously perform input and output functions through the same connection unit Do.

The power connection unit 102 is an input unit for inputting operation power used in the terminal board device 100.

The first remote unit signal connection unit 111 and the second remote unit signal connection unit 112 monitor the operation state of the remotely connected power facility remote unit (RTU) 400, measure the frame ground level value, A line is connected to the transmission line. That is, the operation state monitoring and measurement of the power plant remote unit (RTU) 400 is performed by detecting and analyzing the frame ground level of the corresponding connection line.

The digital signal input / output device connection unit 103 is configured to transmit and receive a signal for monitoring and controlling a power facility located at a remote location by analyzing signals detected from the first remote device signal connection unit 111 and the second remote device signal connection unit 112 And is connected to a digital signal input module or a digital signal output module of a power monitoring and control remote unit (RTU)

The plurality of board fixing holes 121 to 127 are parts for connecting the supporting board for the structural connection of the terminal board device 100 and the fault detecting device 200. A state in which the terminal board device 100 and the fault detection device 200 are connected to each other by vertically connecting the support boards to the plurality of board fixing holes 121 to 127 is well shown in FIG.

Hereinafter, a fault detection apparatus 200 according to an embodiment of the present invention will be described in detail with reference to FIG. 2. A failure of a power facility is detected (detected), and a failure state, And informs the operator, etc.

The failure detection device 200 may include a measurement unit 210, an analysis unit 220, and one or more connection units 201, 204, and 205.

The measuring unit 210 detects or measures a state signal of a line connecting the terminal board device 100 and a remote unit (RTU) (hereinafter referred to as "detecting"). The measurement unit 210 may include a frame ground voltage level value of a signal that includes a relay configuration and is transmitted from the terminal board device 100 to a remote remote unit (RTU), feedback from the remote unit (RTU) frame-level voltage level of the feed-backed signal.

Conversely, the measuring unit 210 measures a frame ground voltage level value of a signal received from the remote control unit (RTU), a frame ground voltage level of a signal fed back through the corresponding relay apparatus of the terminal board device 100 The level value can be detected.

Here, the reason why the frame ground level status signal is detected is that, as will be described later in detail with reference to FIGS. 4 through 7, The voltage level of the ground is compared, and when the difference of the voltage value is within a predetermined error range, it can be judged as normal and otherwise, it can be judged as the fault state.

That is, the analysis unit 220 detects and compares the frame ground voltage level value detected and input from the line connected between the terminal board device 100 and the remote unit (RTU) It is determined whether the corresponding line failure or the remote remote unit (RTU) has failed.

The analysis unit 220 may calculate the frame ground voltage level value of the signal transmitted from the terminal board device 100 to the remote remote unit (RTU) between the terminal board device 100 and the remote remote unit (RTU) The voltage value of the signal transmitted from the remote subunit (RTU), and the value of the voltage of the signal transmitted from the relay device of the terminal board device 100 by feed-back ) Can be compared with each other. Where the voltage value may be a frame ground level value.

The analyzer 220 may compare the difference between the compared values with a predetermined threshold value to determine whether a fault condition of the connected power equipment is generated. The analyzer 220 determines that the failure state is detected when the difference value between the input and feedback values of the terminal board device 100 and the remote unit RTU exceeds a predetermined threshold value And if it does not exceed the threshold value, it can be judged as a normal state.

When analyzing the failure state, the analyzer 220 can determine whether the power failure, the ground failure, and the occurrence of a troublesome interference.

The analysis unit 220 determines whether or not the terminal board device 100 is connected to the power source device abnormally operated and outputs a power failure alarm when the terminal board device 100 determines that the terminal board device 100 is connected to the abnormal power source device. Signal can be generated.

The analyzer 220 analyzes the voltage value detected from the line and determines whether a frame ground level value that is out of the allowable range or a ground level value is detected, A ground fault alarm signal can be generated if the value is outside the allowed level range of the frame ground or if the ground (ground) level value is analyzed and determined to be detected.

The analysis unit 220 analyzes the corresponding voltage values detected from the respective lines, and thus determines whether or not the lines are interlocked with each other. If it is determined that interlocks have occurred between the lines, have.

The analysis unit 220 transmits the generated failure alarm signal, that is, the power failure alarm signal, the ground failure alarm signal, and the confusion generation alarm signal to the terminal board device 100 so that the failure state is displayed through the display unit 110 It is controlled and monitored so that it can be checked by the operator.

The failure detection device 200 may include a plurality of connection units as in the terminal board device 100.

The failure analysis signal input connection unit 201 is a connection unit (terminal) for inputting to the failure detection device 200 for analyzing the state of the line received from the terminal board device 100, that is, the voltage value detected from the line.

The analysis management connection unit 204 is connected to a specific external device or a corresponding input / output device used by an operator and inputs a corresponding signal, thereby inputting a voltage value of a normal operation range or a voltage value range of a faulty state, A command signal for performing a test for a normal operation part, and a connection part for inputting the corresponding data, respectively.

The failure analysis result output connection unit 205 transmits the corresponding signal indicating the failure state or the normal state to the terminal board device 100 by analyzing the voltage value detected from each line, (feed-back).

4 to 8 are diagrams illustrating a method of detecting a fault condition of a line connected between a terminal board device and a power facility in a fault detection device using a frame ground level of a power supply for a power facility remote control device according to an embodiment of the present invention Fig.

Referring to FIG. 4, a method for determining whether a fault has occurred by analyzing an input signal collected through the fault detection apparatus 200 according to an embodiment of the present invention will be described.

The voltage applied to the terminal board device 100 is applied to the remote signal output device 10 by the connected line. The remote signal output device 10 is an output device of a remote remote unit (RTU) 400 to which one or more (plural) power facilities are connected.

4, the remote signal output apparatus 10 may include a signal output relay 11. In addition, The remote signal output apparatus 10 performs the corresponding operation of the signal output relay 11 by the corresponding voltage signal inputted thereto and the corresponding voltage signal by the operation of the signal output relay 11 is returned to the terminal board apparatus 100 again Delivery or feedback (feed-back).

The terminal board device 100 detects the state signal of the feed-back line and feeds back or feeds back the signal to the fault detection device 200. The fault detection device 200 has the same structure as that shown in Figs. 1 and 2 The terminal board device 100 feeds back the result of analyzing the state of the corresponding line by the analysis method described with reference to FIG.

5, the terminal board device 100 is driven by the digital control signal applied to the remote signal input device 20 of the remote subunit (RTU) 400 and the signal output relay 21 is driven The voltage value of the corresponding output signal (state signal of the line) driven by the signal output relay 21 is transmitted or fed back to the terminal board device 100.

At this time, the status signal of the line detected by the terminal board device 100 is transferred or fed back to the fault detection device 200, and the fault detection device 200 is connected to the fault detection device 200 Method to analyze the corresponding status signal. The result analyzed through the fault detection device 200 is fed back to the terminal board device 100 and displayed on the display unit 10 so that the operator can check the fault and the fault location.

Referring to FIG. 6, a connection relationship diagram of the digital signal input module 30 and the terminal board device 100 of the remote unit RTU is illustrated. The signal applied to the terminal board device 100 is transmitted through the connected line And is transmitted to the remote signal output device 20.

The remote signal output device 20 feeds back the corresponding signal input from the terminal board device 100 back to the terminal board device 100 and the terminal board device 100 feeds back the corresponding signal To the digital signal input module 30 of the remote unit (RTU).

7 is an explanatory view showing a signal flow of the digital signal output module 40 and the terminal board device 100 of the remote subunit (RTU).

The terminal board device 100 detects a signal applied from the remote signal input device 10 by the corresponding control signal of the digital signal output device 40 configured in the remote small device (RTU) The signal detected by the board device 100 may be transmitted to the fault detection device 200 via the corresponding connection line.

8 illustrates an example of occurrence of a power failure, a grounding fault, and a troublesome failure of the terminal board device 100. FIG.

The power failure occurs when the terminal board device 100 is connected to the abnormal power supply device 50 and the power failure alarm signal is output by the corresponding control signal.

The grounding fault may be caused when the line connected between the terminal board device 100 and the remote signal input / output device 80 is connected to the frame ground 60 due to a wiring error and a frame ground value outside the permitted range is detected or ground ground 70 ), The ground fault alarm signal is outputted by the corresponding control signal.

When a line is interrupted between the connected lines, the terminal board device 100 outputs the output signal to the alarm output terminal due to a trouble caused by the corresponding control signal.

Referring to FIG. 9, a fault detection method according to an embodiment of the present invention will be described. Hereinafter, redundant description will be omitted for the parts overlapping with those described with reference to Figs. 1 to 8.

The initialization step (S110) initializes various variables used in the program of the present invention and initializes an alarm state value.

A state signal detection (measurement) step (S120) of the line connecting the terminal board and the remote substation device is performed by the fault detection device.

The measurement or detection is based on the voltage value of the signal transmitted from the terminal board to the remote unit (RTU), the voltage value of the signal fed back through the relay unit in the remote unit, the voltage of the signal transmitted from the remote unit Value, a detection of the voltage value of the feed-back signal through the relay device of the terminal board.

(S130) is performed to determine whether the connected line is faulty by comparing the input and feedback-voltage values between the terminal board and the remote substation device.

That is, the difference between the voltage value of the signal transmitted from the terminal board to the remote sub-apparatus and the voltage value fed back through the relay apparatus in the remote sub-apparatus, or the voltage value of the signal transmitted from the remote sub- The voltage difference value of the feed-back signal is compared with a predetermined threshold value through the relay device of FIG. If it is determined that the voltage value difference exceeds the predetermined threshold value range, it is determined to be in the fault state, and the control proceeds to step S140; otherwise, the step S120 is feed-back to perform the above-described operation again.

In step S140, it is determined whether a power failure has occurred.

That is, if it is determined that the terminal board is connected to the abnormal power source device and the terminal board is connected to the abnormal power source device, the process proceeds to step S150 to generate a power failure alarm signal to be displayed on the display unit. If it is determined in step S160, the process proceeds to step S160.

In step S160, it is determined whether a ground fault has occurred.

That is, whether the voltage value detected from the connected lines is a value corresponding to the allowable range in the frame ground or connected to the ground ground is analyzed, If it is determined that the value corresponds to the value or the value connected to the ground, the process proceeds to step S170 where it is determined that the ground fault has occurred and the ground fault alarm signal is generated and transmitted to be output from the display unit.

In step S180, it is judged whether or not the interference trouble has occurred.

In other words, it is determined whether or not a touched line has occurred between the connected lines. If it is determined that touched lines have occurred, the flow proceeds to step S190 to generate a touched trouble occurrence signal and transmits the touched trouble occurrence signal to the display unit. (feed-back) and re-executes the above-described procedure.

In addition, the ground fault alarm signal and the mixed-alarm occurrence alarm signal mentioned in steps S170 and S190 may include line or channel information on which a fault has occurred. Accordingly, it is possible to output, through the display unit, what type of fault has occurred in the current electric power facility and which line (channel) has been faulted so that the operator can know.

Hereinafter, the fault detection method of the present invention will be described in detail with reference to FIGS. 10 and 11. FIG. 10 is a graph illustrating steps S140, S160, and S180 of the fault detection method.

Referring to FIG. 10, a solid line indicates a voltage change value for determining the field information or a change value of the voltage measured through the connected line, S0 indicates a normal range for determining the OFF state, and S1 indicates an ON state Normal range, and t1 represents the stabilization threshold time range for state stabilization.

The judgment of the ON state or the OFF state value of the installed electric power facility is judged as the voltage value applied to the line (cable) connected to the site electric power facility.

It is necessary to set the normal range (S0) determined to be in the OFF state and the normal range (S1) determined to be the ON state in order to monitor the electric power facilities and determine whether the controlled contact state is normal. It is also necessary to set the time t1 for judging the state stabilization at the time of the state change.

The present invention can determine whether or not a line connected to a power plant installed in the field is obstructed by judging in real time whether a field status value is within a normal range in order to determine the presence or absence of a fault.

That is, when the measured voltage value deviates from the normal range value of the OFF state when the contact point for the monitoring and control of the electric power facility is OFF, when the voltage value measured in the ON state deviates from the normal range value of the ON state , It can be judged that a power failure or a trouble has occurred when the time value when the contact state is changed from the OFF state to the ON state or from the ON state to the OFF state is out of the range of the state stabilization time t1.

In addition, if the voltage value is measured as a value between the normal range of the OFF state and the normal range of the ON state, it can be judged that the interference trouble has occurred.

11 is a graph for explaining a step S160 of determining whether the connected line is connected to the frame ground or the earth ground. The solid line is a change value of the voltage for determining the field information, and E0 is a ground state judgment Lt; / RTI >

In FIG. 10, the ground ground is used as a reference, and in FIG. 11, the voltage values are determined based on the frame ground.

In addition, whether or not the ground voltage of the voltage is judged is determined not only in the potential difference between the ground and the ground, but also in the potential difference between the ground and the frame ground. , This judgment is made in real time and notified to the operator.

FIG. 12 is a functional block diagram illustrating a failure detection apparatus using a frame ground level of a power supply unit for a remote control apparatus for a power facility according to an embodiment of the present invention. FIG. 14 is a field configuration diagram for explaining field arrangement of a fault analysis frame according to an embodiment of the present invention, and FIG. 15 is a diagram illustrating a field configuration of a fault analysis apparatus according to an embodiment of the present invention Fig. 7 is a functional block diagram illustrating a terminal board according to another embodiment of the present invention.

The failure detecting device 90 using the frame ground level of the power supply for the power supply remote control device of the power equipment remote control apparatus 100 includes the terminal board device 100, the failure detecting device 200, the remote device 400 A scada system 500, a power equipment 600, a frame ground level setting unit 700, and an opening / closing switch unit 800. [

A Supervisory Control And Data Acquisition (SCADA) system 500 monitors the operation state of the electric power facility 600 at a remote location and outputs a signal for controlling the operation state.

The electric power facility 600 is installed in a site where electric power is generated and transmitted, distributed, distributed and consumed, and includes a tower, a pole, a transmission and distribution line, a substation, a transformer, an actuator, a breaker and a leaker.

The scada system 500 and the electric power facility 600 are generally well known, and a detailed description thereof will be omitted.

The remote subsystem 400 is installed between the scada system 500 and the power facility 600 in the field and controls and monitors the power facility 600 by the control signal of the scada system 500, To the scada system (500).

The remote slaughter device 400 receives operation power from the terminal board device 100 and can operate or control the remote slaughter device 400 according to a command signal applied from the terminal board device 100.

The remote slave unit 400 controls the operation state of the electric power facility 600 based on the command signal inputted via the terminal board device 100 and outputs the result of the control to the terminal board device 100 and the scada system 500, respectively.

The frame ground level setting unit 700 sets a voltage corresponding to an intermediate level of operation power supplied from the terminal board device 100 to the remote slave device 400 and outputs the frame ground voltage level value to the terminal board device 100 Output.

The frame ground level setting unit 700 may connect resistors of the same value in series and output a voltage detected at a connected portion as a frame ground voltage level value.

Here, it is preferable to use a resistance of 50 ohms and 1 watt in order to prevent power loss. If the resistance value is larger, the power loss is larger and if the resistance value is smaller, the volume becomes larger.

The opening / closing switch unit 800 is automatically set to an on state or an off state by a corresponding control signal of the terminal board device 100. However, a manual on or off state can be set.

The opening and closing switch unit 800 is provided between the frame ground level setting unit 700 and the terminal board device 100 to apply the frame ground voltage level value set by the frame ground level setting unit 700 to the terminal board device 100 Or shut down.

The opening / closing switch unit 800 may be configured to be installed inside or outside the terminal board device 100, and may be selectively configured as needed. In the attached FIG. 15, the terminal board device 100 The opening / closing switch unit 800 is provided in the inside of the main body 100. As shown in FIG.

The terminal board device 100 is connected to the remote slave device 400 through the corresponding line and supplies the input power to the operation power source through a corresponding line connected to the remote slave device 400.

Since a plurality of remote devices 400 can be connected and connected to the terminal board device 100, the number of lines increases by the number of remote devices 400, and each line is formed as a pair. Do.

The terminal board device 100 includes a terminal board control unit 140, a display unit 110, an initialization button unit 150, a fault analysis signal connection unit 101, a fault analysis result output connection unit 106, 111), and a second remote device signal connection unit (112).

The failure analysis signal connection unit 101, the failure analysis result output connection unit 106, the display unit 110, the first remote unit signal connection unit 111 and the second remote unit signal connection unit 112 are described in detail in detail So duplicate description will be omitted except when necessary.

The terminal board control unit 140 detects the level of the voltage applied from the frame ground level setting unit 700 and connects the fault detection device 200 to transmit the detected frame ground voltage level value, And receives and stores a failure status confirmation signal in an allocated area of the built-in memory area.

The display unit 110 displays the normal operation, the power failure, the ground fault, the blind trouble, and the fault occurrence position visually by the control signal of the terminal board control unit 140, respectively.

The initialization button unit 150 is connected to the terminal board control unit 140 and inputs an initialization display command signal so that a display signal output to the display unit 110 displays a normal operation state.

That is, when the initialization display command signal is inputted from the initialization button unit 150, the terminal board control unit 140 controls the display unit 110 to be fully lit, not to be fully lit, or to operate in the blinking state, It is relatively highly desirable to draw attention to keeping the initialization indication to be displayed for 1 second to 5 seconds, while maintaining a normal operating state for 2 seconds.

The fault detection device 200 receives the frame ground voltage level value from the terminal board device 100 and records the stored value in the allocated memory area and compares it with the voltage level value recorded in the table part 240 to determine normal operation, And the voltage level value of the range allowed for the ground fault and the occlusion fault, and analyzes the connection position signal of the detected line, searches the information stored in the table unit 240, .

The fault detection device 200 is configured to include an analysis unit 220, a measurement unit 210, and a table unit 240.

The analysis unit 220 connects to the terminal board device 100 and inputs the detected frame ground voltage level value.

The analyzing unit 220 analyzes the signal input from the table unit 240 and classifies the signal into one of a normal operation, a power failure, a grounding fault, and a blindness failure, records the fault in the fault analysis frame 900, do.

The measurement unit 210 is connected to the analysis unit 220 and receives the frame ground voltage level value to detect the level of the voltage.

The table unit 240 is connected to the analysis unit 220 and compares the voltage level value detected by the measuring unit 210 with the stored voltage level value to determine whether it is in a normal operation state, Or a state in which it is in a mixed state or in a mixed state, and then outputs the confirmed result.

The table unit 240 preferably records and stores each piece of information in the form of a table in order to speed up the search.

The failure detection device 200 receives serial number information of a terminal (terminal) for which a frame ground voltage level value is detected from the terminal board device and receives position information of the recorded power equipment in correspondence with the terminal serial number in the table portion 240 And the searched location information is described or recorded in the fault analysis frame 900. In the following description, the description and the recording are used in the same sense, but are selectively used in accordance with the context.

It is quite obvious that the terminal board control unit 140 can extract the information recorded in the failure analysis frame through the decoding or decoding process when the signal encrypted by the failure analysis frame 900 is inputted.

The failure analysis frame 900 includes a start field 901, a normal operation field 902, a power failure field 903, a ground fault field 904, a blind failure field 905, a failure location field 906, A field 907, and an end field 908. [

The start field 901 indicates the start of the failure analysis frame 900 and the total number of bits constituting the information recorded in the failure analysis frame 900 is recorded by the corresponding control signal of the analysis unit 220 And the recorded time information is recorded including 3 words.

The normal operation field 902 is disposed at the next sequential position in the start field 901 and information indicating whether the power facility 600 is in a normal operation state or a normal operation state is recorded by a corresponding control signal of the analysis unit 220 It consists of 4 words.

The power failure field 903 is located at the next sequential position in the normal operation field 902 and the information indicating the power failure of the power facility 600 or the state of occurrence of the power failure is transmitted to the analysis unit 220 And consists of 4 words.

The grounding fault field 904 is placed at the next sequential position in the power supply fault field 903 and information indicating whether the grounding fault of the power plant 600 or the ground fault has occurred is detected by the corresponding control signal of the analysis unit 220 And consists of 4 words.

The blinking obstacle field 905 is disposed at the next sequential position in the grounding fault field 904 and the information indicating whether the blinking of the power facility 600 or the grounding fault has occurred is transmitted to the analysis unit 220 And consists of 4 words.

The fault location field 906 is located at the next sequential position in the blindness fault field 905 and the information of the fault location of the power facility 600 is recorded by the corresponding control signal of the analysis unit 220 and consists of four words.

The error check field 907 is located at the next sequential position in the fault location field 906 and checks whether the number of all bits recorded in the fault analysis frame 900 is correct and whether a transmission error is included in the CRC check reduncy check check method and corrects an error that can be corrected by the CRC check method when a transmission error is included. If the error can not be corrected, the program that generates a retransmission request signal 220, and is composed of 4 words.

The end field 908 is placed at the next sequential position in the error check field 907 and a signal for ending the failure analysis frame 900 is recorded by the corresponding control signal of the analysis unit 220 and is made up of three words.

Here, the word of the failure analysis frame 900 is composed of 25 bytes (bytes), and the byte is composed of 11 bits (bits).

The fault analysis frame 900 consists of a total of 30 words. By limiting the unit configuration of each word and byte, it is possible to protect the information from hacking and to minimize errors during transmission.

And each field is recorded in the most central position among the allocated bits and the same number of bits are left in the right and left sides to keep blank. If it is difficult to assign the same number of bits to the left and right, allocate one more bit to the left.

On the other hand, the analyzer 220 repeatedly transmits the fault analysis frame to the terminal board device three times in one second.

As described above, an optimal embodiment has been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

100: Terminal board device 101: Fault analysis signal input connection
102: power connection part 103: digital signal input / output device connection part
105: 7-segment 106: abnormality analysis result output connection
110: Display section 111: First remote device signal connection section
112: Second remote device signal connection unit 140: Terminal board control unit
121 to 127: board connection part 200: failure detection device
201: abnormality analysis signal input connection part 204: analysis management connection part
205: abnormality analysis result output connection part 210:
220: Analysis section 240: Table section
400: Remote sub-device 500: Scada
600: power equipment 700: level setting unit
800: opening / closing switch 900: failure analysis frame

Claims (7)

And a terminal board device installed between the scada system and the electric power equipment for supplying an operation voltage to the remote device for controlling and monitoring the electric power facility by the control signal of the scada system, A fault detection apparatus using a frame ground level, the fault detection apparatus comprising:
A frame ground level setting unit for setting an intermediate level of a voltage supplied from the terminal board device to the remote slave device and outputting the frame ground voltage level value to the terminal board device;
An open / close switch unit installed between the frame ground level setting unit and the terminal board device to apply or block the output value of the frame ground voltage level to the terminal board device; And
The frame ground voltage level value is input from the terminal board device, and is recorded and stored in the allocated memory area. The voltage value is compared with a voltage level value recorded in the table part to determine a voltage in a range allowed for normal operation, power failure, And a failure detection unit for analyzing a connection position signal of the detected line and searching for information recorded and stored in the table unit to identify a failure occurrence position. A power supply for a remote power supply comprising a power supply frame ground fault level detection device.
The method according to claim 1,
The terminal board device
A terminal board control unit for detecting a level of a voltage applied from the frame ground level setting unit, transmitting a detected frame ground voltage level value by connecting to the fault detection device, and receiving a fault status confirmation signal;
A display unit for displaying a normal operation, a power failure, a grounding fault, a blind trouble, and a fault occurrence position visually by a control signal of the terminal board control unit; And
An initialization button unit connected to the terminal board control unit for inputting an initialization display command signal so that a display signal outputted to the display unit displays a normal operation state; A power supply for a remote power supply comprising a power supply frame ground fault level detection device.
3. The method according to claim 1 or 2,
The fault detection device
An analysis unit connected to the terminal board device and inputting a detected frame ground voltage level value;
A measuring unit connected to the analyzing unit and receiving the frame ground voltage level value and detecting the level of the voltage; And
A table unit connected to the analyzer and receiving a voltage level value detected by the measuring unit and comparing the voltage level with a stored voltage level to search for whether the voltage level corresponds to a normal operation, a power failure, a ground fault, or a blind trouble; , ≪ / RTI &
The analysis unit analyzes the signal input from the table unit and classifies the signal into one of a normal operation, a power failure, a grounding fault, and a blindness fault, records it in a fault analysis frame, and transmits the fault analysis frame to the terminal board device Fault detection device using frame ground level.
The method of claim 3,
The fault detection device
Receiving terminal serial number information from which the frame ground voltage level value is detected from the terminal board device, searching the location information of the power equipment recorded and stored in correspondence with the terminal serial number in the table portion, Frame of the power supply for a remote control apparatus of a power facility.
5. The method of claim 4,
The fault analysis frame
A 3-word start field in which a position signal at which the fault analysis frame starts and a total number of bits of information recorded in the fault analysis frame are recorded by a corresponding control signal of the analysis unit and are recorded including time information;
A normal operation field of 4 words arranged at the next sequential position of the start field and in which the normal operation of the electric power facility is recorded by the corresponding control signal of the analysis unit;
A 4-word power failure field disposed at the next sequential position in the normal operation field and in which power failure of the power facility is recorded by a corresponding control signal of the analyzer;
A four-word ground fault field located at the next sequential position in the power supply fault field and in which the ground fault of the power plant is recorded by the corresponding control signal of the analysis unit;
A four-word coherence failure field disposed at the next sequential position in the ground fault field and in which a blinking failure of the power facility is recorded by a corresponding control signal of the analysis unit;
A 4-word fault location field disposed at a next sequential position in the mixed-signal fault field and in which a fault location of the power plant is recorded by a corresponding control signal of the analysis unit;
Checks whether all bit numbers recorded in the fault analysis frame are correct, checks whether a transmission error is included, analyzes it by a CRC check method, and if a transmission error is included, A 4-word error check field in which a program for generating a retransmission request signal is recorded by a corresponding control signal of the analyzer if the possible error is corrected and correction is impossible; And
An end field of three words which is arranged at a next sequential position in the error check field and in which a signal for ending the failure analysis frame is recorded by a corresponding control signal of the analysis unit; A power supply for a remote power supply comprising a power supply frame ground fault level detection device.
6. The method of claim 5,
The word of the fault analysis frame is formed in units of 25 bytes,
Wherein the byte is formed in units of 11 bits. A fault detection apparatus using a power supply frame ground level for a power facility remote small enclosure.
The method according to claim 6,
The analyzer
And the fault analysis frame is repeatedly transmitted to the terminal board device three times per second. The fault detection device using the frame ground level of the power supply unit for the remote facility of the power facility.

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