KR102548271B1 - System and Method for monitoring Remote Terminal Unit - Google Patents

Abstract

A communication module monitoring system capable of checking the digital value of a communication module of a remote device in real time at a power supply branch is disclosed. The communication module monitoring system is connected to an image collection device that generates image information by sensing output information of a component module of a remote device and is connected to the image collection device through a power grid, and detects an event using the image information. It is characterized in that it includes a monitoring server that determines the operating state of the configuration module.

Description

Remote device monitoring system and method {System and Method for monitoring Remote Terminal Unit}

The present invention relates to a technology for monitoring a communication module of a remote-site device, and more particularly, to a remote-site device monitoring system capable of checking a digital value of a communication module of a remote-site device in real time at a branch office.

The SCADA (Supervisory control and data acquisition) system consists of a dispatching branch system that allows operators to monitor/control power facilities and a remote terminal unit, which is a terminal device installed in a substation.

The remote device is MPD (Main Processing Device), which plays a pivotal role in the system, and FPD (Field Processing Device) for acquiring information on monitoring points or control points of on-site power facilities, and the voltage of power facilities, It consists of IAPD (Intelligent Analog Processing Device), a device that measures analog information such as current and active/reactive power.

In the MPD, FPD, IAPD Rack, etc., a communication module for monitoring power facilities and a power module for supplying power to the communication module are embedded in the sub-rack. This power module receives 54V voltage from the main power supply of the remote device and outputs 5V and 12V voltages. By the way, the 5V voltage is used to supply power to the monitoring and control modules, and the 12V voltage is used to drive the measurement module and control module relay.

On the other hand, when a failure occurs in the SCADA system, when an event occurred in a remote station device is transmitted to a dispatching branch, the dispatcher visually checks the event and determines the failure section. In the case of a power facility failure, rapid maintenance is performed by matching the name of the event and the failure-occurring facility, but the communication modules such as monitoring, control, and measurement do not have the same name as the failure event and the defective module, making it difficult to handle failures promptly. am.

Since the failure section is identified as an event, if the event and failure equipment details are different, it takes a lot of time to process the failure, exposing many problems in power facility operation. In particular, when a power failure occurs in the power module, a fail alarm is generated when the reference voltage exceeds 5% in the remote device. In addition, the alarm event is not transmitted to the dispatch branch, so in the event of a failure, the maintainer takes action after visually checking it on site. Therefore, when a power module is defective, problems such as power facility monitoring and control failure due to a defective communication module occur.

In addition, in the case of a defective power module, a fail alarm does not occur if the output voltage is less than about 5% of the reference value of the output voltage. In this case, since the communication module is operated unlisted, it takes a lot of time to identify the cause of the failure.

In conclusion, since the digital value of the communication module of the remote station device cannot be checked in real time at the power supply branch, a lot of maintenance time is required.

1. Korea Patent Registration No. 10-1015466 (registration date: February 10, 2011)

The present invention has been proposed to solve the problems caused by the above background art, and an object of the present invention is to provide a remote site device monitoring system capable of checking a digital value of a communication module of a remote site device in real time at a branch office.

Another object of the present invention is to provide a remote device monitoring system capable of monitoring and controlling a power facility due to a defective communication module even when a defective power module occurs.

In order to achieve the above object, the present invention provides a communication module monitoring system capable of checking the digital value of a communication module of a remote device in real time at a branch office.

The communication module monitoring system,

an image collecting device generating image information by sensing output information of a configuration module of a remote device; and

and a monitoring server that is connected to the video collection device through a power grid and determines an operating state of the configuration module by detecting an event using the video information.

The image information may include at least one of a voltage, an on/off operating state of a light emitting diode (LED), and an on/off operating state of a fail alarm LED.

In addition, the voltage is characterized in that a value obtained by photographing an output value of a power module among the constituent modules.

In addition, the operating state is characterized in that the operating state value of the communication module among the configuration modules.

In addition, the monitoring server, a collection unit for collecting the image information; a reading unit reading the image information to obtain the output value or the operating state value; and an analyzer configured to compare the output value or the operating state value with a preset reference value to determine whether or not there is an abnormality in the configuration module, and to generate the event according to the abnormality.

In addition, the reading is characterized in that numbers and letters are separated and extracted from the image information using OCR (Optical Character Recognition) technology.

In addition, the output value is characterized in that the voltage.

In addition, the operating state value is characterized in that the LED on-off state or the number of times the LED on-off.

Further, the event is an alarm process, and the alarm process is characterized in that it is generated by a combination of a comparison result between the output value of the power module and the reference value and whether the operating state of the communication module is normal.

In addition, the remote control device is characterized in that it is a supervisory control and data acquisition (SCADA) remote control device.

On the other hand, another embodiment of the present invention includes: (a) generating image information by sensing output information of a component module of a remote location device by an image collection device; and (b) detecting an event with the image information by a monitoring server connected to the video collecting device through a power grid to determine an operating state of the component module. do.

According to the present invention, it is possible to prevent an abnormality in a communication module caused by a defective power module in advance, thereby contributing to the stable operation of power facilities.

In addition, as another effect of the present invention, when an error occurs in the communication module, the cause of the defect can be identified in real time, and the defect occurrence event is transmitted to the person in charge, so that rapid maintenance is possible and the event occurrence history can be managed, thereby increasing the efficiency of maintenance. that it is possible.

In addition, another effect of the present invention is that the communication module status and analog data generated in real time can be visually converted into data and provided to the person in charge, thereby providing convenience in monitoring and managing the communication module.

1 is a block diagram of a system for monitoring a remote device according to an embodiment of the present invention.
FIG. 2 is a detailed block diagram of the image collection device shown in FIG. 1 .
Figure 3 is a detailed block diagram of the monitoring server shown in Figure 1;
4 is a conceptual diagram of event processing of the communication module monitoring system shown in FIG. 1 .
5 is a flowchart showing an event processing process according to an embodiment of the present invention.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

In describing each figure, like reference numbers are used for like elements. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. The term "and/or" includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs.

Terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with the meanings in the context of the related art, and unless explicitly defined in this application, they should not be interpreted in ideal or excessively formal meanings. Should not be.

Hereinafter, a system and method for monitoring a remote device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a remote device monitoring system 100 according to an embodiment of the present invention. Referring to FIG. 1 , the remote device monitoring system 100 includes the first to n th video collecting devices 110-1 to 110-n, a power grid 120, and a monitoring server 130 connected to the power grid 120. ) and the like.

The first to nth image collection devices 110-1 to 110-n perform a function of collecting analog data and digital data of a communication module of a remote location device (not shown) and transmitting them to the monitoring server 130. In general, a power plant for generating power and a substation that boosts or steps down the voltage in several steps in the process of supplying power from the power plant to consumers, and concentrates or distributes power generation and transmission power include circuit breakers, Various types of power facilities (field facilities) such as disconnectors and relays are installed.

In this way, a remote terminal unit (RTU) is installed in the field to monitor power facilities (field facilities) scattered in power plants, substations, etc., and to provide operation information of power facilities in connection with the upper power station system. The remote site device acquires, analyzes, and processes operation information from electric power facilities such as substations or power plants scattered in remote areas, and transmits the processed information to the host of the upper power supply (sub) station or host of the upper power supply (sub) station. It is a device designed to manage power equipment by receiving commands from it.

To this end, the remote device is an MPD (Main Processing Device) (not shown), which plays a central role in the system, and an FPD (Field Processing Device) for acquiring information on monitoring points or control points of on-site power facilities. ) (not shown), IAPD (Intelligent Analog Processing Device) (not shown) that measures analog information such as voltage, current, and active/reactive power of power facilities and transmits the generated data to MPD. MPD, FPD, and IAPD are made in a rack method, and in this rack, a subrack is composed, and in this subrack, a communication module for monitoring power facilities and a communication module for supplying power to the communication module (not shown) A power module (not shown) is embedded.

The sub rack consists of a power module and several communication modules. Usually, one power module is composed of 2 to 10 communication modules. A monitoring module, a control module, and an analog module exist in the communication module, and the monitoring module, control module, and analog module may be installed in different sub-racks.

In addition, the power module receives a 54V voltage from a main power supply (not shown) of the remote device and outputs 5V, 12V, and 25V voltages. At this time, the 5V voltage is used to supply power to the monitoring and control modules, and the 12V voltage is used to drive the measurement module and control module relay.

In order to generate image information by sensing output information of these remote devices, the first to n th image collection devices 110-1 to 110-n are installed. In other words, a video camera is installed in the SCADA room of the unmanned substation, and it can be used as the video collecting devices 110-1 to 110-n. Of course, alternatively, it is also possible to install a new image collection device.

The power grid 120 refers to a network configured for communication by flowing a data signal through an already existing power line using PLC (Power Line Communication) technology. Power lines consist of high-voltage power lines (about 22.9 kV) and/or low-voltage power lines (about 110-220 V). In addition, the power grid may include a repeater, a power communication modem, a transformer, and the like. The modem configured for connection to the power grid 120 may perform a function of connecting the power grid to a general communication network.

A general communication network refers to a connection structure capable of exchanging information between each node, such as a plurality of terminals and servers, such as a public switched telephone network (PSTN), a public switched data network (PSDN), and an integrated services network (ISDN). Digital Networks), Broadband ISDN (BISDN), Local Area Network (LAN), Metropolitan Area Network (MAN), Wide LAN (WLAN), etc. However, the present invention is not limited thereto, and wireless communication networks CDMA (Code Division Multiple Access), WCDMA (Wideband Code Division Multiple Access), Wibro (Wireless Broadband), WiFi (Wireless Fidelity), HSDPA (High Speed Downlink Packet Access) ) network, Bluetooth, NFC (Near Field Communication) network, satellite broadcasting network, analog broadcasting network, DMB (Digital Multimedia Broadcasting) network, and the like. Alternatively, it may be a combination of these wired communication networks and wireless communication networks.

The monitoring server 130 displays digital data status values, analog data values, etc. of a communication module and/or power module provided in a remote device, and sets an event detection criterion.

In other words, Link Pulse LEDs (light emitting diodes) are formed on the rear of the communication module configured in the remote device, as can be seen on the rear of the LAN card, and English letters indicating the output status (i.e., operating status) of these LEDs are engraved. there is. Accordingly, it is possible to obtain digital data state values by photographing the rear surface of the communication module using the image collection devices 110-1 to 110-n.

Meanwhile, even in the case of the power module, a value representing the current output voltage may be displayed on the back side. For example, the current output voltage value may be "5.11" (unit V). This value becomes the analog data value.

FIG. 2 is a detailed block diagram of the image collection devices 110-1 to 110-n shown in FIG. Referring to FIG. 2, the image collection devices 110-1 to 110-n include a sensor 210 that detects an image and generates analog image information, a controller 220 that converts the image information into digital image information, and a power network ( 120) is characterized in that it is configured to include a communication unit 230 for transmitting to the monitoring server 130 through digital image information.

The sensor 210 is a device that generates image information by capturing a component module of a remote device, and may be a Closed Circuit Television (CCTV), a Charge-Coupled Device (CCD) camera, a complementary metal-oxide semiconductor (CMOS) camera, or the like. there is.

The controller 220 performs a function of converting analog image information generated by the sensor 210 into digital image information. To this end, the control unit 220 may include a digital signal processor (DSP), a memory, a microprocessor, and the like. Memory is a flash memory type, a hard disk type, a multimedia card micro type, and a card type memory (e.g., SD (Secure Digital) or XD (eXtreme Digital)). memory, etc.), RAM (Random Access Memory, RAM), SRAM (Static Random Access Memory), ROM (Read Only Memory, ROM), EEPROM (Electrically Erasable Programmable Read Only Memory), PROM (Programmable Read Only Memory), magnetic memory , a magnetic disk, and an optical disk may include at least one type of storage medium.

The communication unit 230 performs a function of transmitting digital image information to the monitoring server 230 through the power grid 120 . To this end, the communication unit 230 may include a microprocessor, a modem, a LAN card, and a circuit. Also, the communication unit 230 is a communication module and may include an LED displaying an operating state. More specifically, on the back of the communication module, characters indicating an operating state and LEDs corresponding to the characters are arranged side by side. Also, the communication module may be composed of several sub communication modules. That is, it may be composed of sub communication module 1, sub communication module 2...sub communication module n.

The output unit 240 displays information processed by the image collection devices 110-1 to 110-n or displays a menu screen for setting some functions. To this end, the output unit 240 includes a liquid crystal display (LCD), a light emitting diode (LED) display, a plasma display panel (PDP), an organic LED (OLED) display, a touch screen, a cathode ray tube (CRT), and a flexible display. can be In the case of a touch screen, it can also function as an input means.

Therefore, by using the sensor 210 installed inside the SCADA room of the unmanned substation, monitoring the analog image information and digital image information of the output values (which can be voltage, LED on/off, etc.) It can be transmitted to the server 130 and displayed on the monitor. Of course, it is also possible to display on the output unit 240. The configuration module may be a communication module, a power module, and the like.

In this case, the digital image information may be a voltage of a component module, an operating state of LED On/Off, an operating state of Fail Alarm LED On/Off, and the like.

Figure 3 is a detailed block diagram of the monitoring server 130 shown in Figure 1. Referring to FIG. 3, the monitoring server 130 includes a communication unit 310 to be connected to the power grid 120, a collection unit 320 for collecting digital image information from the image collection devices 110-1 to 110-n, A reading unit 330 that obtains specific information by reading digital image information, an analysis unit 340 that compares the specific information with a preset reference value to determine whether a component module has an abnormality, and generates an event according to the abnormality; It may be configured to include an output unit 350 that outputs an event.

The communication unit 310 performs a function of being connected to the power grid 120 through wired or wireless communication. To this end, a microprocessor, modem, LAN card, circuit, etc. are configured.

The collection unit 320 performs a function of acquiring the voltage of the component module, the operating state of LED On/Off, the operating state of Fail Alarm LED On/Off, and the like. In other words, analog information (i.e., voltage, text) of the power module and communication module, and digital information (i.e., LED On/Off) of the communication module and/or power module are obtained. That is, if the LED is on, it is “1”, and if the LED is off, it is “0”.

The reading unit 330 performs a function of converting an analog value into a digital value and reading an operating state of digital information. In other words, OCR (Optical Character Recognition) technology is used to read numbers and characters from image information.

The analyzer 340 compares the voltage converted to a digital value with a preset reference value, and generates an event according to the comparison result. In addition, the analyzer 340 reads “normal” as “1” as LED On, and reads “0” as “bad” as LED Off. In addition, it can be read as normal or defective by using the number of on-off times. In other words, when the reference value of the number of on-off times is 10, if the measured number of on-off times is 9, it can be read as “defective”, and if it is 11, it can be read as “normal”. An event refers to generating alarm information. Alarm information may be a combination of text, graphics, and voice.

Accordingly, the analyzer 340 displays a defective event of the power module on the screen, and generates an alarm event when the fail alarm state value is ON in the case of digital information values.

The output unit 350 performs a function of expressing an event. In addition, a menu screen for setting event occurrence conditions may be displayed in order to determine whether or not the operation is normal. The output unit 350 may include a warning light, a sound system, and a display. The display may be a liquid crystal display (LCD), a light emitting diode (LED) display, a plasma display panel (PDP), an organic LED (OLED) display, a touch screen, a cathode ray tube (CRT), a flexible display, or the like. In the case of a touch screen, a user's command may be input as an input means.

The collection unit 320, the reading unit 330, and the analysis unit 340 shown in FIG. 3 refer to units that process at least one function or operation, and may be implemented in software and/or hardware. In hardware implementation, ASIC (application specific integrated circuit), DSP (digital signal processing), PLD (programmable logic device), FPGA (field programmable gate array), processor, microprocessor, other It may be implemented as an electronic unit or a combination thereof. In software implementation, software component components (elements), object-oriented software component components, class component components and task component components, processes, functions, properties, procedures, subroutines, segments of program code, drivers, firmware, microcode, data , databases, data structures, tables, arrays, and variables. Software, data, etc. may be stored in memory and executed by a processor. The memory or processor may employ various means well known to those skilled in the art.

4 is a conceptual diagram of event processing of the communication module monitoring system shown in FIG. 1 . Referring to FIG. 4 , the categories 410 , data type 420 , output voltage 430 , module state 430 , decision 440 , and notification status 450 are configured. Referring to FIG. 4, in the case of an analog value of the power module, when the output voltage drops by 4% or more of the reference value and a failure of the communication module (i.e., “0”) occurs, a failure warning event of the power module is generated and the screen is displayed. Displays a power module failure event on . In the case of the digital value of the power module, if the Fail Alarm state value is ON, an alarm event is generated and the Fail event is displayed on the screen in the event window. Here, the digital value refers to LED state values (On/Off) of power modules and communication modules.

For understanding, referring to FIG. 4 further, when the voltage value drops by 3%, the communication module is all normal and therefore non-alarm processing.

On the other hand, if the voltage value of the reference value (5V, 12V, 25V) drops by 4% (in the case of 5V, if it drops by 0.2V), the Fail alarm LED is not turned on. However, if the voltage value drops by 4% and even one of the communication modules is defective, it is treated as a major alarm, and if all communication modules are normal, it is treated as a non-alarm.

In addition, if the voltage value of the reference value (5V, 12V, 25V) drops by more than 5%, the Fail alarm LED is turned on on the power module, but if it drops by 4%, the alarm LED is not turned on. In the case of 5V, when the voltage drops by 0.25V, the Fail alarm LED turns on. That is, when a Fail alarm LED occurs, it is treated as a major alarm regardless of the communication module failure.

Due to such event processing, the facility operator can quickly determine the cause of failure of the communication module by quickly checking the event for each situation and take action. At this time, the operator may set the event grade by checking the analog value, the digital value, and the event. That is, the event grade can be set to major, normal, or the like.

In addition, event learning for analog values is performed through correlation between analog information and digital information and event analysis. In addition, the failure of the power module can be predicted through analog data value analysis .

5 is a flowchart showing an event processing process according to an embodiment of the present invention. Referring to FIG. 5 , first, the image collection devices 110-1 to 110-n monitor the SCADA remote control device to generate image information and collect the image information (steps S510 and S520).

Thereafter, the monitoring server 130 recognizes the image information collected in real time, and performs optical character reading to measure the resulting value (step S550).

Thereafter, the measured value is compared with a preset reference value (step S560). That is, it is determined whether the measured value is significantly lower than the reference value.

As a result of the comparison, if the measured value is significantly lower than the reference value, it is determined as “Major” and an alarm is processed (steps S570 and S571).

Unlike this, as a result of the comparison, if the measured value does not fall below the reference value, it is determined as "Normal" and non-alarm processing is performed (steps S580 and S581).

In addition, the steps of a method or algorithm described in connection with the embodiments disclosed herein are implemented in the form of program instructions that can be executed through various computer means such as a microprocessor, processor, CPU (Central Processing Unit), etc. It can be recorded on any available medium. The computer readable medium may include program (instruction) codes, data files, data structures, etc. alone or in combination.

The program (command) code recorded on the medium may be specially designed and configured for the present invention, or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs, DVDs, and Blu-rays, and ROMs and RAMs ( A semiconductor storage element specially configured to store and execute program (instruction) codes such as RAM), flash memory, or the like may be included.

Here, examples of the program (command) code include high-level language codes that can be executed by a computer using an interpreter, as well as machine language codes such as those produced by a compiler. The hardware devices described above may be configured to act as one or more software modules to perform the operations of the present invention, and vice versa.

100: remote device monitoring system
110-1 to 110-n: 1st to nth image collection devices
120: power grid
130: monitoring server

Claims (20)

image collection devices 110-1 to 110-n generating image information by sensing output information of component modules of the remote device; and
A monitoring server 130 connected to the image collection devices 110-1 to 110-n through a power grid 120 and determining an operating state of the component module by detecting an event with the image information;
The image information includes a voltage, an on/off operating state of a light emitting diode (LED), and an on/off operating state of a fail alarm LED;
The voltage is a value obtained by photographing the output value of the power module among the constituent modules,
The operating state is an operating state value of a communication module among the constituent modules,
The image collection devices 110-1 to 110-n acquire digital data state values and analog data values by photographing the rear surface of the component module,
The monitoring server 130,
a collection unit 320 that collects the image information;
a reading unit 330 that reads the image information to obtain the output value and the operating state value; and
An analysis unit 340 that compares the output value and the operating state value with a preset reference value to determine whether or not there is an abnormality in the component module and generates the event according to the abnormality,
The output value is the voltage,
The analyzer 340 compares the output value of the power module with a preset reference value, and treats the communication module as normal or defective according to the operating state value of the communication module based on the comparison result,
The reading separates and extracts numbers and characters from the image information using OCR (Optical Character Recognition) technology,
The operating state value is an LED on/off state or the number of times the LED is turned on/off.
delete delete delete delete delete delete delete According to claim 1,
The event is an alarm process, and the alarm process is generated by a combination of a comparison result between the output value of the power module and the reference value and whether the operating state of the communication module is normal.
According to claim 1,
The remote location device monitoring system, characterized in that the remote location device is a supervisory control and data acquisition (SCADA) remote location device.
(a) generating image information by sensing output information of a configuration module of a remote site device by the image collection devices 110-1 to 110-n; and
(b) determining an operating state of the configuration module by the monitoring server 130 connected to the image collection devices 110-1 to 110-n through the power grid 120 by detecting an event with the image information; Including,
The image information includes a voltage, an on/off operating state of a light emitting diode (LED), and an on/off operating state of a fail alarm LED;
The voltage is a value obtained by photographing the output value of the power module among the constituent modules,
The operating state is an operating state value of a communication module among the constituent modules,
The image collection devices 110-1 to 110-n acquire digital data state values and analog data values by photographing the rear surface of the component module,
The monitoring server 130,
a collection unit 320 that collects the image information;
a reading unit 330 that reads the image information to obtain the output value and the operating state value; and
An analysis unit 340 that compares the output value and the operating state value with a preset reference value to determine whether or not there is an abnormality in the component module and generates the event according to the abnormality,
The output value is the voltage,
The analyzer 340 compares the output value of the power module with a preset reference value, and treats the communication module as normal or defective according to the operating state value of the communication module based on the comparison result,
The reading separates and extracts numbers and characters from the image information using OCR (Optical Character Recognition) technology,
The operation state value is an LED on/off state or the number of times the LED is turned on/off.
delete delete delete delete delete delete delete According to claim 11,
wherein the event is an alarm process, and the alarm process is generated by a combination of a comparison result between the output value of the power module and the reference value and whether or not the operating state of the communication module is normal.
According to claim 11,
The remote control device monitoring method according to claim 1 , wherein the remote control device is a supervisory control and data acquisition (SCADA) remote control device.

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