KR100763881B1 - Method for digital diagnosising circuit breaker motion time of measurement - Google Patents

Abstract

The present invention relates to a digital diagnostic method for measuring the breaker operation time for preventing breaker breakdown during operation in a substation or electrical installation. Particularly, the present invention is installed in a breaker or in a switchboard to use an open / close operation time of a breaker using a digital timer of a processor. The main purpose of the monitoring is to diagnose abnormality of the breaker and to reduce the ripple effect of the accident in case of a system accident.

The present invention for achieving the above object, (a) measuring and measuring the circuit breaker operating time, the step of generating and transmitting a circuit breaker status signal; (b) Determining whether the breaker status signal received by the SCADA server is a normal operating status signal or a failure status signal, searching for a predetermined unique identification number, the name of a worker, a contact number and First displaying the measures in the form of a pop-up window; (c) in the case of the normal operation state signal, as a result of the determination of step (b), the SCADA server retrieving the unique identification number of the predetermined circuit breaker and recording and storing the operation state accordingly; (d) When the failure status signal is received as a result of the determination of step (b), the SCADA server searches for a specific identification number of the predetermined circuit breaker, searches for priority measures according to the circuit breaker that has transmitted the failure status, Generating and transmitting to the measurement and monitoring apparatus; And (e) analyzing, by the SCADA server, the cause of the failure state and storing and managing the failure state processing method accordingly. Is made of.

Breaker, Digital Timer, Breaker Operating Time, Measurement Sensor, Breaker Status Information

Description

Digital diagnosis method for measuring breaker operating time {METHOD FOR DIGITAL DIAGNOSISING CIRCUIT BREAKER MOTION TIME OF MEASUREMENT}

1 is a block diagram showing a digital diagnostic system for measuring the breaker operation time according to an embodiment of the present invention;

2A is a logic diagram illustrating a single-phase timer of a digital system for measuring a breaker operation time according to an embodiment of the present invention;

2B is a logic diagram illustrating a three-phase timer of a digital system for measuring a breaker operation time according to an embodiment of the present invention;

3 is a detailed block diagram showing a measurement sensing apparatus according to an embodiment of the present invention;

4 is a detailed block diagram illustrating a SCADA server according to an embodiment of the present invention;

5 is an exemplary view showing a 22.9 kV GIS circuit breaker installed in a substation according to an embodiment of the present invention;

6 is a flowchart illustrating a digital diagnostic method for measuring a breaker operation time according to an embodiment of the present invention;

7 is a flowchart illustrating a digital diagnostic method for measuring a breaker operation time according to an embodiment of the present invention;

8 is a flow diagram illustrating in detail the step of generating a command signal according to an embodiment of the present invention.

** Description of symbols for the main parts of the drawing **

100: circuit breaker 200: measuring sensor

210: power supply 211: surge protection circuit

212: DC-DC Converter or SMPS 220: Central Processing Unit

221: digital input unit 222: digital output unit

223: digital timer 224: real time clock device

225: monitoring instrument 230: network communication unit

240: output unit 241: display device

300: repeater 400: SCADA server

410: network connection 420: state management DB

430: monitor 440: command transmitter

450: state alarm unit 460: data search and analysis unit

470: central processing unit

The present invention relates to a digital diagnostic method for measuring breaker operating time for preventing breaker breakdown during operation in a substation or electrical installation. Particularly, the present invention provides a high-precision digital timer of a processor to be installed in a breaker or in a switchboard. The present invention relates to a diagnostic method for diagnosing an abnormality of a circuit breaker to reduce the ripple effect of an accident in case of a system accident.

In general, among the types of circuit breakers, SF ₆ Gas Insulated Switch Gears (GIS) have a high degree of insulation, which is an environmentally friendly, high-insulation circuit breaker, disconnector, busbar, and transformer in a tank filled with SF6 gas. It is widely used in various electrical facilities with reliability and stability. However, since internal devices cannot be visually identified, it is difficult to detect abnormal signs occurring internally, and it has a problem that power failure time lasts for a long time due to the ripple effect and recovery when an accident such as insulation breakdown occurs.

For reference, breaker accidents include electrical factors, thermal factors, mechanical factors, environmental factors, etc. Among them, deterioration and abnormalities due to electrical factors occurring during operation are most common.

In other words, to prevent accidents caused by deterioration and abnormality of circuit breakers and to maintain their performance, the equipment is maintained by means of instantaneous and inspection, and leakage current measurement, insulation resistance measurement, switching operation characteristics as diagnostic items of circuit breakers. Tests, contact resistance measurements, temperature monitoring of the contacts, investigation of the characteristics of the insulation and extinguishing media, and control circuit tests are carried out.

At this time, in order to perform the opening and closing operation characteristic test, the operation of the circuit breaker must be stopped and the contact point of the circuit breaker coil is inputted to a separate external device, and then the time data operated when opening and closing the circuit breaker is used. Therefore, due to the complexity of the inspection, there is a problem that the power failure time during the inspection is long, and the breaker operation time operating in the actual accident of the circuit breaker in operation cannot be confirmed at the site.

The present invention has been made in view of the above problems, and installs a high-precision digital diagnostic system for measuring the breaker operation time in the breaker or in the switchboard to check the breaker, as well as the convenience and accuracy of the test and the reduction of the outage time. It provides a digital diagnostic method that can diagnose the abnormality of the equipment by measuring the operation time of the breaker in real time even during operation.

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In order to achieve the above technical problem, a digital diagnostic method for measuring a breaker operation time of the present invention includes: (a) measuring and detecting a breaker operating time by the measuring sensor, and generating and transmitting a breaker state signal; (b) Determining whether the breaker status signal received by the SCADA server is a normal operating status signal or a failure status signal, searching for a predetermined unique identification number, the name of a worker, a contact number and First displaying the measures in the form of a pop-up window; (c) in the case of the normal operation state signal, as a result of the determination of step (b), the SCADA server retrieving the unique identification number of the predetermined circuit breaker and recording and storing the operation state accordingly; (d) When the failure status signal is received as a result of the determination in step (b), the SCADA server searches for a specific identification number of the predetermined circuit breaker, searches for priority measures according to the circuit breaker that has transmitted the failure status, and then sends a command signal. Generating and transmitting to the measurement and monitoring apparatus; And (e) analyzing, by the SCADA server, the cause of the failure state and storing and managing the failure state processing method accordingly. Characterized in that it comprises a.

Preferably, before step (a), the measurement sensing device receives a DC power from a power supply device in a substation or an electrical installation; The measurement sensing device executes an operation by a programmed sequence; Receiving, by the measurement sensing device, a breaker state contact to an operation time start digital input and an operation time stop digital input; And when the breaker state contact is in a normal state, preparing, by the measurement sensing device, to operate the digital timer. It characterized in that it further comprises.

The measurement sensing device operating the digital timer; When the operation time stop digital input is input, the measurement sensing device measuring an operation time of the breaker; And generating and transmitting breaker state information according to a fault state by the measurement sensing device when the operation time stop digital input is not input. Characterized in that it comprises a.

Also preferably, before the step (b), the relay device transmits the breaker status signal received from the measurement sensing device to the SCADA server using a communication method according to RS-485, RF communication or PLC; It characterized in that it further comprises.

In the step (d) of generating a command signal, the SCADA server searches for an emergency contact network of a building in which a breaker signal is transmitted and a location of a breaker signal is transmitted using a unique identification number of a circuit breaker. step; Alerting visually using a status notification unit so that an administrator monitoring the remote location of the SCADA server can recognize a failure status signal; Displaying, by the SCADA server, the detected countermeasures and preferred measures through the monitor according to the failure status signal; Generating, by the SCADA server, a command signal for a worker including a priority measure according to the failure status signal and transmitting the same through an RS-232C communication method; Characterized in that it comprises a.

Specific features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. In the meantime, when it is determined that the detailed description of the known functions and configurations related to the present invention may unnecessarily obscure the subject matter of the present invention, it should be noted that the detailed description is omitted.

Hereinafter, the overall technical spirit of the present invention with reference to the drawings.

1 is a block diagram illustrating a digital diagnosis system for measuring breaker operation time according to an embodiment of the present invention, and FIG. 2A is a logic diagram illustrating a single-phase timer of a digital system for measuring breaker operation time according to an embodiment of the present invention. 2B is a logic diagram illustrating a three-phase timer of a digital system for measuring a breaker operation time according to an embodiment of the present invention, and FIG. 3 is a detailed block diagram illustrating a measurement sensing device according to an embodiment of the present invention. 4 is a detailed block diagram showing a SCADA server according to an embodiment of the present invention, Figure 5 is an exemplary view showing a 22.9kV GIS circuit breaker installed in a substation according to an embodiment of the present invention.

With reference to Figures 1 to 5 with reference to the digital diagnostic system for measuring the breaker operating time for the breaker failure prevention as follows.

First, as shown in FIG. 1, a digital diagnostic system for measuring a breaker operation time for preventing a breaker breakdown includes a substation or an electrical installation having a breaker 100 therein, and a breaker provided inside the substation or the electrical installation. Measurement detection device 200 for measuring and monitoring the breaker operation time to detect the operation state of the 100, the relay device 300, SCADA (supervisory control and data acquisition) server 400 ).

In the present embodiment, the substation or electrical equipment is provided with a gas insulated switchgear (GIS; SF ₆ Gas Insulated Switch Gear), a vacuum circuit breaker (VCB) or an air circuit breaker (ACB). It is desirable to be.

For reference, breakers 100 such as 380V, 22.9kV, 154kV, 345kV, and 765kV are installed in the substation and the electric equipment, and three breakers are installed for each phase according to the breaker 100. It is obvious that one circuit breaker is provided or is installed in three phase collectively.

That is, in order to measure the opening and closing operation time of the circuit breaker 100, as shown in Figures 2a and 2b to fit the characteristics of the circuit breaker, one or three phase measurement sensing apparatus 200 should be installed, and the installation place and location of the circuit breaker Obviously, each may vary.

On the other hand, the measurement sensing device 200 is provided in the substation or electrical equipment to perform the function of measuring and monitoring the breaker operating time to transmit the breaker state information to the manager. That is, the measurement sensing device 200 is set to be installed inside the breaker 100 or in a switchboard (not shown), but the present invention is not limited thereto.

In this embodiment, the measurement detection device 200 is set to transmit a separate unique identification number stored in each of the breakers 100 when transmitting the breaker state information to the relay device 300, the present invention It is not limited to this.

The measurement sensing apparatus 200 will be described in detail with reference to FIG. 3, and includes a power supply unit 210, a central processing unit 220, a network communication unit 230, and an output unit 240.

First, the power supply unit 210 supplies power required for the operation of the measurement sensing device 200, receives external DC 125V power, or receives DC power from a power supply device in a substation or an electrical installation.

Looking at, the power supply unit 210 receives the DC power, and outputs the DC 5V required inside the measurement sensing device 200 using a DC-DC converter or a Switching Mode Power Supply (SMPS) 212.

On the other hand, since the power supply unit 210 includes a surge protection circuit 211, the power supply unit 210 may have durability even when an external surge is introduced.

In addition, after receiving the DC power from the power supply unit 210, the central processing unit 220 measures and monitors the breaker operating time by a sequence to perform a function of generating breaker state information including the breaker operating time. In other words, the central processing unit 220 is in charge of the entire sequence and has a built-in 16-bit processor.

First, after the breaker state contact is input through the digital input (DI) unit 221, the breaker operating time is measured using the internal digital timer 223 of the processor, and the digital output (DO) unit is used. Outputting the alarm state of the breaker through the (222), using the real time clock (RTC; Real Time Clock) device 224 to accurately measure the date and time that the breaker operation occurred, and performs the constant monitoring of the processor It includes a watch dog (225).

In addition, after receiving two points of the breaker state contact point from the digital input unit 221 to measure the breaker operation time, the sequence is operated as follows. First, when the state contact of the circuit breaker 100 is in a normal state, DC is applied to the Stop Digital Input, and DC is not applied to the Start Digital Input. Do not. On the other hand, when the circuit breaker 100 operates during a system accident or breaker check, DC is applied to an operation time start digital input to start the digital timer 223 of the measurement sensor 200. When the DC is not applied to the stop time of the digital input (Stop Digital Input), the operation of the digital timer 223 is stopped so that the measurement breaker 200 measures the breaker operating time therebetween.

If the breaker operating time start digital input is applied and the stop time digital input is not input within the set time, the relay alarm point and the front alarm display are displayed through the output unit 240. The device will light up to alert the worker of the anomaly.

On the other hand, the network communication unit 230 transmits the breaker state information generated through the central processing unit 220 to the relay device 300, and receives a transmission signal from the relay device 300.

In this embodiment, the breaker state information includes a breaker operating time and a breaker normal signal when the breaker 100 operates normally, and includes a breaker operating time and breaker failure signal when the breaker is abnormally operated. , The transmission signal is set to include the display device output signal and the setting time according to the breaker normal or fault signal, but the present invention is not limited thereto. Here, the setting time refers to the time when the operation time stops digital input according to the operation time start digital input.

At this time, the network communication unit 230 transmits the breaker state information to the relay device 300 through a communication scheme such as RS-485, RF communication, PLC or the like, it is obvious that the transmission signal received.

In addition, the output unit 240 performs a function of outputting the transmission signal received through the network communication unit 230 through the display device 241 including a text LCD and a Status LED so that the worker can visually check. However, the present invention is not limited thereto, and output of a transmission signal through the speaker is also possible. At this time, the worker has a confirmation key 242 to enable the operator to manually operate the measurement detection device 200 by checking the menu.

For reference, when the measuring and sensing device 200 receives a transmission signal according to a breaker failure signal, the color LED is turned on, and then an audio and visual alert is provided so that an administrator can recognize the command. Perform the function of passing.

Next, the relay device 300 receives the breaker state information from the measurement sensing device 200 and transmits the breaker state information to the SCADA server 400, and generates and measures a transmission signal for the command signal received from the SCADA server 400. By transmitting to the sensing device 200, the circuit breaker 100 generating a fault signal performs a function of handling the fault condition.

In this embodiment, the relay device 300 is connected to the measurement sensing device 200 through a communication method such as RS-485, RF communication, PLC (Power Line Communication), SCADA server through the RS-232C communication port Although set to be connected to 400, the present invention is not limited thereto.

Finally, as shown in FIG. 4, the SCADA server 400 receives the breaker status signal from the relay device 300, and then searches for a predetermined unique identification number to detect the breaker 100 and the measurement sensing device 200. ) To display the name, contact information and priority measures of the worker of the place installed in a pop-up window to allow the remote administrator to monitor, and to transmit the command signal for the worker to the relay device 300 The network connection unit 410, the state management DB 420, the monitor unit 430, the command transmitter 440, and the state alarm unit 450, the data retrieval / analysis unit 460 and the control unit 470 are performed. It includes.

First, the network connection unit 410 performs a function of receiving a breaker status signal from the relay device 300.

The state management DB 420 stores a name, contact information, priority measures, and command signals for the worker at the place where the breaker 100 and the measurement sensing device 200 are installed. At this time, the state management DB 420 stores the failure cause for the breaker failure signal, and stores the failure state processing method accordingly.

When the SCADA server 400 receives the breaker status information including the breaker failure signal, the monitor unit 430 includes the name, contact information, and priority action of the worker at the place where the breaker 100 and the measuring sensor 200 are installed. This function displays a popup window so that an administrator can check it.

The command transmitter 440 generates a command signal for a worker at a place where the breaker 100 and the measurement sensor 200 are installed according to the breaker failure signal, and transmits the command signal to the relay device 300. In other words, a countermeasure for the failure signal is transmitted.

The status alarm unit 450 performs an audiovisual alarm so that an administrator who monitors an operation state and a failure signal of the breaker 100 can be recognized from a remote location.

When the breaker failure signal is received, the data retrieval / analysis unit 460 uses a unique identification number of the breaker 100 set in advance to cope with the breaker 100 failure, and the breaker 100 and the measurement detecting device 200. After searching the emergency contact network, including the name and contact information of the place where the) is installed, and the priority measures according to the fault signal, identify the fault condition and transmit the command signal to the worker through the pre-stored emergency contact network. Analyzes the cause of the failure and stores the cause of the failure and the method of handling the failure condition.

The controller 470 controls the network connection unit 410, the state management DB 420, the monitor unit 430, the command transmitter 440, the state alarm unit 450, and the data retrieval / analysis unit 460. Perform the function.

For reference, the relay device 300 and the SCADA server 400 may be connected in separate communication methods to manage the breakers 100 spaced apart from various locations in a remote or integrated manner.

Hereinafter, the overall flow of the digital diagnostic method for circuit breaker operation time measurement through the system configured as described above will be described with reference to FIGS. 6 to 8.

6 is a flowchart illustrating a digital diagnostic method for measuring breaker operating time according to an embodiment of the present invention, and FIG. 7 is a flowchart illustrating a digital diagnostic method for measuring breaker operating time according to an embodiment of the present invention. 8 is a flowchart specifically showing a step of generating a command signal according to an embodiment of the present invention.

First, as shown in FIG. 6, the measurement sensing apparatus 200 receives DC power from a power supply device in a substation or an electrical installation (S2), and starts operation by a programmed sequence (S4).

Next, the measurement detection device 200 measures the breaker operation time, and generates and transmits a breaker state signal (S6).

Looking at the S6 step of generating and transmitting the breaker state signal in detail with reference to Figure 7 First, the measurement sensor 200 determines whether the breaker state (S61), which is the breaker operation time is faster than the setting time If it is generated after the breaker state information of the normal state and transmits (S62).

On the other hand, as a result of the determination of step S61, when the breaker operation time is not earlier than the setting time, the measurement sensing device 200 generates and transmits the breaker state information according to the failure state (S63).

That is, when the breaker operation time is slower than the setting time, the worker is notified of an abnormality through the display device 241 including the text LCD and the status LED.

Next, the relay device 300 transmits the breaker status signal received from the measurement sensor 200 to the SCADA server 400 by using a separate communication method such as RS-485, RF communication, or PLC.

The SCADA server 400 determines whether the received breaker state signal is a normal operation state signal or a failure state signal (S8).

As a result of the determination in step S8, when the failure state signal is received, the SCADA server 400 searches for a unique identification number of the predetermined breaker 100 to take priority action according to the breaker 100 that transmits the failure state. After the search, the command signal is generated and transmitted to the relay device 300 (S10).

Specifically, referring to the step S10 with reference to FIG. 8, the SCADA server 400 uses the unique identification number of the circuit breaker 100 previously stored, and the position and measurement detection device of the circuit breaker 100 that transmits a fault state signal. Search and store the emergency contact network of the building 200 is installed (S101).

At this time, the SCADA server 400 alerts visually and visually using the status notification unit 450 so that an administrator who monitors the remote site can recognize the failure status signal (S102).

Next, the SCADA server 400 displays the retrieved coping method and priority measures through the monitor (S103), and generates a command signal for the worker including the priority measures according to the failure status signal to measure the measuring apparatus 200. (S104).

At this time, the relay device 300 generates a transmission signal according to the command signal and transmits it to the measurement sensing device 200. In the present embodiment, the relay device 300 transmits and receives information with the SCADA server 400 using the RS-232C communication method, and uses the RS-485, RF communication, or PLC communication method with the measurement detection device 200. Although set to transmit and receive information, the present invention is not limited thereto.

After the failure state processing, the SCADA server 400 analyzes the cause of the failure and stores the failure state processing method accordingly (S12), and prepares for a preparation for a failure situation in the future.

On the other hand, when the determination result of step S8, when receiving the normal operating state signal of the circuit breaker, SCADA server 400 retrieves the unique identification number of the predetermined circuit breaker 100 to record and store the operation state according to ( S14). At this time, the blue image is displayed on the screen so that the administrator can check the normal signal.

 As described above and described with reference to a preferred embodiment for illustrating the technical idea of the present invention, the present invention is not limited to the configuration and operation as shown and described as described above, it is a deviation from the scope of the technical idea It will be understood by those skilled in the art that many modifications and variations can be made to the invention without departing from the scope of the invention. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

According to the present invention as described above, the real-time monitoring of the operation state of the breaker in the remote place to detect the situation quickly when a failure occurs, so that the administrator can respond in real time, to prevent the operation error of the breaker in advance There is a distinctive effect.

This monitors the breaker's opening and closing operation time all the time, thereby diagnosing the breaker's abnormality, reducing the ripple effect of system accidents and improving the reliability of power supply, and reducing supply failures and improving power quality. There is also an economic effect that can contribute to the restoration of trust and economic development.

In addition, by analyzing and storing the operation error and the corresponding response method, it is possible to deliver a quick priority action to the worker for the future operation error.

Claims (12)

In the digital diagnostic method for measuring the breaker operating time, (a) measuring the circuit breaker operation time by the measurement sensing apparatus 200 and generating a circuit breaker status signal; (b) determining whether the circuit breaker state signal received by the SCADA server 400 is a normal operating state signal or a fault state signal, and searching for a preset unique identification number; Displaying a worker's name, contact information and priority measures of a place where the breaker and the measurement sensing device are installed in a pop-up window form; (c) the SCADA server searching for a unique identification number of a predetermined circuit breaker and recording and storing the operation state according to the determination result of step (b); (d) If the failure status signal is received as a result of the determination of step (b), the SCADA server searches for a unique identification number of a predetermined circuit breaker to search even the priority according to the circuit breaker 100 that transmits the failure status. Generating a command signal and transmitting the command signal to the measurement and monitoring apparatus; And (e) analyzing, by the SCADA server, the cause of the failure state and storing and managing the failure state processing method accordingly; Digital diagnostic method for measuring the breaker operating time comprising a. delete The method according to claim 1, Before step (a), Receiving, by the measurement sensing device, DC power from a power supply device in a substation or an electrical installation; The measurement sensing device executing an operation by a programmed sequence; Receiving, by the measurement sensing device, a breaker state contact to an operation time start digital input and an operation time stop digital input; And When the breaker state contact is in a normal state, preparing the operation of the digital timer 223 by the measurement sensing device; Digital diagnostic method for measuring the breaker operation time further comprising. The method according to claim 1, The step (a) of generating a circuit breaker state signal may include: The measurement sensing device operating the digital timer; Measuring the breaker operating time by the measuring sensor when an operating time stop digital input is input; And Generating and transmitting breaker state information according to a fault state by the measurement sensing device when an operation time stop digital input is not input; Digital diagnostic method for measuring the breaker operating time comprising a. The method according to claim 1, Before step (b), Transmitting, by the relay apparatus, the circuit breaker status signal received from the measurement sensing apparatus to the SCADA server using a communication method according to RS-485, RF communication, or PLC; Digital diagnostic method for measuring the breaker operating time further comprising a. The method according to claim 1, The step (d) of generating a command signal may include: Searching, by the SCADA server, a location of the breaker that transmits a fault condition signal using a unique identification number of the breaker previously stored and an emergency contact network of a building in which the measurement sensing device is installed; Alerting visually and visually using a status notification unit 450 so that the SCADA server can remotely monitor a failure status signal; Displaying, by the SCADA server, a countermeasure and a preferred action retrieved according to a failure state signal through a monitor; And Generating, by the SCADA server, a command signal for a worker including a priority measure according to a failure state signal and transmitting the same through an RS-232C communication method; Digital diagnostic method for measuring the breaker operating time comprising a. delete delete delete delete delete delete

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