KR101264344B1 - Digital controlling system for monitoring internal abnormal state of switchgear - Google Patents

Abstract

PURPOSE: A digital control system for monitoring the state of an internal switchboard is provided to sense an abnormal state on time by installing a temperature sensor and a flame sensor inside of a switchboard. CONSTITUTION: A temperature sensor(25) inputs measured temperature data into a temperature measurement terminal. The temperature sensor is installed in the connection part of a bus bar and a breaker in a non-contact way. An operation sensor(21) inputs detected operation data into an operation input terminal. A flame sensor(26) inputs detected flame data into a flame sensing terminal. A digital controller(100) operates an alarm issue device and an automatic extinguishing device by sensing an abnormal state.

Description

DIGITAL CONTROLLING SYSTEM FOR MONITORING INTERNAL ABNORMAL STATE OF SWITCHGEAR}

The present invention relates to a digital control system for monitoring an internal abnormal state of a switchgear such as a high voltage and low voltage switchgear, a motor control panel, and a distribution panel. More specifically, the high voltage power (22.9 kV) of the Korea Electric Power Corporation (hereinafter referred to as "KEPCO") In order to minimize accidents occurring in switchboards installed in large-capacity power consumers for the purpose of converting and supplying low voltage power (380 / 220V) required for consumer loads. In addition, the present invention relates to a digital control system for monitoring an abnormal condition inside a switchboard, which is initially suppressed by using an automatic fire extinguishing device installed in the event of a final fire.

Generally, high and low voltage switchboards, motor control panels, and distribution boards are collectively referred to as switchboards. These switchboards are equipment that distributes power to individual loads by receiving power from KEPCO and converting it into electric power that can be used by consumers through transformers.

In general, power devices such as switchgears, power fuses, instrument transformers, and breakers are electrically connected to busbars and cables in electrical switchboards, and at the contact points where power devices are connected to busbars and cables. It is known that the most temperature rise occurs due to loosening of bolts and contact resistance.

The endurance of the switchboard is usually 15 years, and many switchboards used in the field are obsolete and need to be replaced. In addition, the connection of power devices inside the switchgear due to aging deterioration, rapidly increasing office equipment, overload due to the increase in the use of electronic products, and increasing harmonic current caused by the use of these products, fault current generated in the event of power system accidents, etc. The overheating phenomenon exceeding the temperature rise limit value specified in KEMC 2101 (High Voltage Switchgear) [Table 1] and 2102 (Low Voltage Switchgear) [Table 2] frequently occurs.

[Table 1] Temperature Rise Limit (High Voltage Switchgear)

[Table 2] Temperature Rise Limit (Low Voltage Switchgear)

In addition, due to the aging of switchgear and breaker, it is impossible to suppress the failure and explosion of power equipment due to ignition due to arc scattering, fire of cable due to overheating of connection part, and conduction of overheating. The number of electric fires generated inside the switchboard is spreading throughout the building.

In addition, the number of safety accidents of on-site workers who are working in and near the switchboard without knowing the abnormal state of the switchboard such as overheating and flame, and who suffers electric shock and burns due to inadvertent accidents are still increasing. Skills are needed.

On the other hand, in relation to the conventional overheat protection technology due to internal deterioration of the switchboard, a number of applications and registrations other than Korea Patent Registration No. 10-1190244 (hereinafter referred to as "prior literature") is registered.

However, even in the conventional switchboard heat detection system such as the above-mentioned literature, since it is a monitoring method using a simple camera imaging device rather than a digital controller for monitoring an abnormal state inside the switchboard, electric accidents may occur due to heat generation, flames, and electric shock. There is always a problem.

In case of fire, overheating and flames caused by accidents such as overheating caused by aging deterioration, overload, accident current and continuous overheating, equipment failure, and explosion of equipment, There was a problem that an electric shock and a burn accident occurred by carrying out internal and external work without grasping a spreading fire and an abnormal condition that is gradually spreading inside the switchboard.

That is, the present invention was devised in view of the above problems, and in order to prevent electric accidents that can be caused by large lives and property damages in advance to minimize damages, the first time of overheating occurs. It is an object of the present invention to provide a digital control system for monitoring abnormal conditions inside switchboards, which is used to extinguish the alarm by using an automatic fire extinguishing device installed inside the switchboard in case of an alarm, a second alarm in case of a fire, and a final fire.

The present invention for achieving the technical problem relates to a digital control system for monitoring the abnormal state inside the switchboard, it is installed in a non-contact manner at the connection between the breaker and the busbar located on the secondary side of the switchboard transformer, the temperature of the connection site A temperature sensing device for measuring and inputting the measured temperature data to the temperature measuring terminal; A motion detection device that detects motion data according to a movement of an on-site worker working near or in front of or behind the switchboard and inputs the detected motion data to a motion input terminal; A flame detection device for detecting a flame generated inside the switchboard and inputting the detected flame data to the flame detection terminal; A digital controller for monitoring an internal abnormal state of a switchboard based on data received from the temperature sensing device, an operation detecting device, and a flame detecting device, and operating an alarm and an automatic fire extinguishing device when an abnormal condition occurs; And an automatic fire extinguishing device which is activated after a delay time of a preset automatic fire extinguishing device according to the data sensed by the temperature detecting device and the flame detecting device. .

According to the present invention as described above, by installing and operating a temperature sensor, a flame detection device, a motion detection device and an automatic fire extinguishing device and a digital controller inside the switchboard, it is possible to detect and deal with abnormal conditions occurring in the switchboard in a timely manner. In addition, it is effective in minimizing damage by preventing electric accidents that can be caused by large-scale fire and damage to many lives and property.

1 is an external view of a digital controller according to an embodiment of the present invention.
2 is a detailed configuration diagram of a digital controller according to an embodiment of the present invention.
Figure 3 is an exemplary view showing the front and the inside of the switchboard to which the digital control system for monitoring the abnormal state inside the switchboard according to an embodiment of the present invention.

Specific features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. It should be noted that, if it is determined that the detailed description of the sensing function and the configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In addition, it should be noted that the switchboard as shown in FIG. 3 is representatively shown for the high-voltage and low-voltage switchgear integrated type among the high-voltage and low-voltage switchgear, motor control panel, distribution panel, the breaker is a vacuum circuit breaker, air circuit breaker, circuit breaker Is expressed comprehensively.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

Referring to Figures 1 to 3 with respect to the digital control system for monitoring the abnormal state inside the switchboard according to an embodiment of the present invention.

1 is an external view of a digital controller according to an embodiment of the present invention, as shown in the front, so that the user can check the abnormal state even if the user does not open the switchboard door at the installation site and visually check the internal state. It is composed of a portion to be displayed and a portion which can be operated to set the function of the digital controller 100.

Specifically, as shown in (a) of FIG. 1, in front of the digital controller 100, the temperature measured by the temperature sensing device 25, whether the flame sensing device 26 is operated, and the motion sensing device 21: 21a, 21b, 21c) LCD 12 showing operation, flashes in conjunction with three function keys (F1 to F3) and function keys 11 that can be moved to temperature, flame, and operation display functions 3 LEDs (L1 to L3) (10), temperature rise value setting, 6 operation keys (K1 to K6) (13) for setting the internal functions of the digital controller 100, the normal operation of the digital controller 100 (L4), device fault (L8), overheat detection (L5), flame detection (L6), automatic fire extinguishing (L7), primary alarm (L9), secondary alarm (L10), communication status (L11) It consists of eight LEDs (L4 to L11) to display.

On the other hand, as shown in Figure 1 (b), the rear of the digital controller 100, the connection with the temperature sensor 25, flame detection device 26, motion detection device 21 and the external device Two 10-row (20 Point) terminal blocks (T1, T2) 14, 15 are configured.

Here, the five columns 1A, 1B to 5A, 5B of the T1 terminal block 14 are the temperature measuring terminals 101 for receiving temperature data of the temperature sensing device 25, and the three columns of the T1 terminal block 14 (6A). , 6B to 8A, 8B are operation input terminals 102 for receiving operation data of the motion sensing devices 21: 21a, 21b, and 21c, and two columns (9A, 9B to 10A, 10B of the T1 terminal block 14). ) Is used as the flame detection terminal 103 for receiving the flame data of the flame detection device (26).

In addition, the T2 terminal block 15 includes three columns of alarm output contacts (1A, 1B to 3A, 3B), one row of operating contacts for the automatic fire extinguishing device 22 (5A, 5B), one row for RS485 communication (7A, 7B), and control. It is used as one row (9A, 9B) for power supply and one row (10A, 10B) for grounding.

On the other hand, as shown in (c) of Figure 1, the side of the digital controller 100 is provided with a handle 16 and the terminal block 17.

The terminal block 17 is a T1 terminal block 14 and a T2 terminal block 15 in FIG. 1 (b).

The terminal block 17 is connected to the temperature detecting device 25, the flame detecting device 26, the motion detecting device 21, and the external device, so that the internal controller of the digital controller 100 can be replaced. There is an inconvenience to work after breaking the entire wiring.

Therefore, the digital controller 100 according to the present invention is designed in a draw out type structure in which the inside and the case 18 can be separated, and if necessary, the handle 18 is pulled forward by the handle 16. ), It can be easily separated from the terminal block (17).

2 is a detailed configuration diagram of the digital controller 100 according to an embodiment of the present invention, based on data received from the temperature sensing device 25, the motion sensing device 21, and the flame sensing device 26. It monitors the abnormal state of the switchboard, and when an abnormal condition occurs, it performs a function of alerting and operating an automatic fire extinguishing device. As shown in FIG. 2, a temperature measuring terminal 101, an operation input terminal 102, and a flame Detection terminal 103, first conversion unit 104, second conversion unit 105, control unit 106, user interface unit 107, output unit 108, communication unit 109 and wireless communication unit 110 It is made, including.

The temperature measuring terminal 101 receives temperature data from the temperature sensing device 25.

The motion input terminal 102 receives motion data from the motion detection device 21.

The flame detection terminal 103 receives flame data from the flame detection device 26.

The first converter 104 converts the temperature data received through the temperature measuring terminal 101 and the operation data received through the operation input terminal 102 into digital values.

The second conversion unit 105 converts a contact input value such as flame data received through the flame detection terminal 103 into a voltage capable of confirming the operation of the flame detection device 26.

A user machine interface (MMI) 107 is connected to the LCD 12 and the LEDs L4 to L11 for checking various kinds of information.

The output unit 108 operates the automatic fire extinguishing device 22 and issues an alarm through a buzzer, a warning light, a speaker, and the like.

The communication unit 109 transmits the sensed data to an external monitoring program through RS485 communication.

The wireless communication unit 110 transmits to the outside about the sensed data and data on the current situation of the switchboard, and receives the control signal accordingly.

The control unit 106 is based on an output value input through the first and second conversion units 104 and 105, and according to a programmed sequence, a man machine interface (MMI) ( 107) controls the display so that the user can check the information with the naked eye, and operates the output contact through the output unit 108 to operate the automatic fire extinguishing device 22, and through the buzzer, beacon, speaker, etc. Control the alarm to issue an abnormal condition to the outside, and transmit the data sensed through the communication unit 109 to the outside, and to the outside about the data detected through the wireless communication unit 110 and the data on the current situation of the switchboard. It transmits and controls to receive the control signal accordingly from the outside.

3 is an exemplary view showing a switchboard to which a digital control system for monitoring an abnormal state inside a switchboard according to an embodiment of the present invention is applied, and an installation method in connection with the configuration of the digital controller 100 shown in FIGS. 1 and 2. The operation state will be described in detail.

Figure 3 (a) is a front view of a switchboard to which the digital control system for monitoring the abnormal state inside the switchboard according to an embodiment of the present invention, Figure 3 (b) is a switchboard to which the digital control system for monitoring the abnormal state inside the switchboard is applied. Is also inside.

As shown, the digital controller 100 is installed on the front panel of the switchboard so that the user can check the abnormal state even if the user does not open the switchboard door at the installation site and visually check the internal condition.

The temperature sensing device 25 is installed in a non-contact manner at the connection portion 27 of the breaker 23 and the busbar 24 located on the secondary side of the transformer 28 to measure the temperature of the connection portion 27, The measured temperature data is input to the temperature measuring terminal 101.

Here, the reason for using the non-contact method is that if the wiring is connected to the connection part 27 together in a contact method, since the supply power can be replaced even when the temperature sensing device 25 is abnormal, replacement is possible. The detection device 25 can be used for convenient replacement even in the event of a device malfunction. At this time, the installation method of the non-contact temperature sensing device 25 is varied according to the internal structure of the switchboard.

The flame detection device 26 detects a flame generated inside the switchboard and inputs the detected flame data into the flame detection terminal 103. At this time, it is installed at the upper rear part of the switchboard, and has a sensing distance within 10m and an angle of 100 degrees up, down, left, and right for wide flame detection, and can determine the size and type of the flame.

The motion detecting apparatuses 21: 21a, 21b, and 21c detect motion data according to the movement of a field worker who is working in front of or behind the switchboard, and inputs the detected motion data to the motion input terminal 102. .

Meanwhile, when an abnormal state occurs in the switchboard, the operating state of the temperature sensing device 25, the flame sensing device 26, the motion sensing devices 21: 21a, 21b, 21c and the digital controller 100 is as follows.

The temperature sensing device 25 detects the temperature at the circuit breaker 23 and the busbar 24 connection part 27, and the detected temperature data is used as the T1 terminal block at the rear of the digital controller 100, which is the temperature measuring terminal 101. (14) (1A, 1B), and when the input temperature data is equal to or higher than the preset temperature value in the control unit 106 of the digital controller 100, the control unit 106 via the user interface unit 107 LED ( L5) and the LED L9 are turned on, and the primary alarm is issued through the T2 terminal block 15 (1A, 1B) contact which is the output 108.

In addition, when overheating continues and an explosion or flame of a power device installed inside the switchboard occurs, the flame detection device 26 installed at the rear detects the flame and converts the detected flame data into the flame detection terminal 103. The controller 100 inputs the T1 terminal block 14 (9A, 9B) at the rear of the controller 100, and the control unit 106 turns on the LED L6 and the LED L10 through the user interface unit 107, and outputs the unit 108. ), The secondary alarm is issued through the T2 terminal block 15 (2A, 2B) contact point.

In addition, the motion detection apparatuses 21: 21a, 21b, and 21c detect motion data according to the movement of a field worker who is working near or inside the switchboard front and rear, and converts the detected motion data into the motion input terminal 102. After inputting to the T1 terminal block 14 (6A, 6B ~ 8A, 8B) at the rear of the digital controller 100, when an abnormal state is detected inside the switchboard when the operator is in the field, the first and second alarms are issued. The control unit 106 immediately issues a danger alarm to the field worker through the T2 terminal block 15 (3A, 3B) contact which is the output unit 108.

In addition, the automatic fire extinguishing device 22 is a secondary alarm is issued in accordance with the data sensed by the temperature sensor and the flame detection device, the delay time (0 ~ 1 minutes) of the preset automatic fire extinguishing device 22 can be set. Afterwards, the control unit 106 operates the automatic fire extinguishing device 22 by operating the T2 terminal block 15 (5A, 5B), which is the output unit 108, to initially extinguish a fire occurring in the switchboard.

At this time, the fire extinguishing agent of the automatic fire extinguishing device 22 may use the gas-based clean fire extinguishing agent, and reuse the switchboard even after the fire suppression.

In addition, the temperature data, flame data, and operation data input to the digital controller 100, that is, the sensed data, are externally transmitted via RS 485 communication using the T2 terminal block 15 (7A, 7B), which is an output unit 108. It is sent to the monitoring program.

In this case, the digital controller 100 may transmit to the outside about the data sensed through the wireless communication module 110 and the data on the current situation of the switchboard, and receive the control signal accordingly.

While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It will be appreciated by those skilled in the art that numerous changes and modifications may be made without departing from the invention. Accordingly, all such appropriate modifications and changes, and equivalents thereof, should be regarded as within the scope of the present invention.

25: temperature detection device 26: flame detection device
21 (21a, 21b, 21c): motion detection device 22: automatic fire extinguishing device
100: Digital controller 10: LED (L1 to L3)
11: Function key (F1 ~ F3) 12: LCD
13: Control key (K1 ~ K6) 14: T1 terminal block
15: T2 terminal block 16: handle
18: case

Claims (9)

In the digital control system for monitoring the internal abnormal state of the switchgear including high and low voltage switchgear, motor control panel, distribution panel,
A temperature sensing device installed in a non-contact manner at a connection portion between the breaker and the busbar located at the secondary side of the switchboard transformer, the temperature sensing device measuring the temperature of the connection portion and inputting the measured temperature data into the temperature measuring terminal;
A motion detection device that detects motion data according to a movement of an on-site worker working near or in front of or behind the switchboard and inputs the detected motion data to a motion input terminal;
A flame detection device for detecting a flame generated inside the switchboard and inputting the detected flame data to the flame detection terminal;
A digital controller for monitoring an internal abnormal state of a switchboard based on data received from the temperature sensing device, an operation detecting device, and a flame detecting device, and operating an alarm and an automatic fire extinguishing device when an abnormal condition occurs; And
An automatic fire extinguishing device which is activated according to the data sensed by the temperature detecting device and the flame detecting device and is activated after a delay time of a preset automatic fire extinguishing device; Including but not limited to:
The digital controller has two or more ten-row (20Point) T1 terminal blocks and a T2 terminal block for connecting to the temperature sensor, the flame detector, the motion detector, and the external device on the rear thereof. Digital control system for condition monitoring.
The method of claim 1,
The digital controller,
Three function keys (F1 to F3) that can be moved to the LCD, temperature, flame, and operation display function to display the temperature measured by the temperature sensing device, the operation of the flame detection device, the operation of the operation detection device on the front thereof. 3 LEDs (L1 to L3) flashing in conjunction with the function keys, temperature rise value setting, 6 operation keys (K1 to K6) for setting the internal functions of the digital controller, normal operation of the digital controller (L4), Eight (8) display device error (L8), overheat detection (L5), flame detection (L6), automatic fire extinguishing device operation (L7), primary alarm (L9), secondary alarm (L10), communication status (L11) Digital control system for monitoring the abnormal state inside the switchgear comprising an LED (L4 ~ L11).
delete The method of claim 1,
The five columns (1A, 1B to 5A, 5B) of the T1 terminal block are temperature measuring terminals 101 for receiving temperature data of the temperature sensing device, and the three rows of T1 terminal blocks (6A, 6B to 8A, 8B) are , An operation input terminal for receiving operation data of the motion detection device, and two columns (9A, 9B to 10A, 10B) of the T1 terminal block are flame detection terminals for receiving flame data of the flame detection device. Digital control system for monitoring abnormal status inside switchboard.
The method of claim 1,
The T2 terminal block,
3 alarm output contacts (1A, 1B ~ 3A, 3B), 1 operation contact point (5A, 5B) for the automatic fire extinguishing device, 1 row for RS485 communication (7A, 7B), 1 row for control power supply (9A, 9B), ground Digital control system for monitoring abnormal state inside switchboard, characterized in that it is used in one row (10A, 10B).
The method of claim 1,
The digital controller,
A temperature measuring terminal for receiving temperature data from the temperature sensing device;
A motion input terminal for receiving motion data from the motion detection device;
A flame detection terminal for receiving flame data from the flame detection device;
A first converter converting the temperature data received through the temperature measuring terminal and the operation data received through the operation input terminal into digital values;
A second converter converting the flame data received through the flame detection terminal into a voltage capable of confirming the operation of the flame detection device;
A user interface unit connected to the LCD 12 and the LEDs L4 to L11 for checking various information;
An output unit which operates the automatic fire extinguishing device and issues an alarm;
Communication unit for transmitting the detected data to the external monitoring program through the RS485 communication; And
Based on the output values input through the first and second converters, according to the programmed sequence, the user interface is controlled to display the information visually through the user interface, and the output contact through the output unit. A control unit configured to operate the automatic fire extinguishing device to control the operation, to issue an alarm to an on-site worker, and to transmit data sensed through the communication unit to the outside; Digital control system for monitoring the abnormal state inside the switchgear comprising a.
The method of claim 1,
The temperature sensing device detects the temperature at the circuit breaker and the busbar connection part and inputs the detected temperature data to the T1 terminal blocks 1A and 1B of the rear part of the digital controller which is a temperature measuring terminal.
When the input temperature data is equal to or higher than the temperature value preset in the controller of the digital controller, the controller turns on the LED L5 and the LED L9 through the user interface unit, and contacts the output terminal T2 terminal blocks 1A and 1B. Digital control system for monitoring abnormal condition inside switchboard, characterized by issuing a primary alarm.
The method of claim 1,
The flame detection device detects a flame and inputs the detected flame data to the T1 terminal blocks 9A and 9B of the rear side of the digital controller which is a flame detection terminal.
The controller of the digital controller turns on the LED L6 and the LED L10 through the user interface unit and issues a secondary alarm through the T2 terminal block 2A and 2B as the output unit. Digital control system for surveillance.
The method of claim 1,
The motion detection device detects motion data according to the movement of an on-site worker working in front of, behind, or inside the switchboard, and transmits the detected motion data to the T1 terminal block 6A, 6B to 8A at the rear of the digital controller which is a motion input terminal. , 8B),
When an abnormal state is detected inside the switchboard when the worker is in the field and the first and second alarms are issued, the controller of the digital controller issues a danger alarm to the field worker through the T2 terminal block (3A, 3B) contact point. Digital control system for monitoring the abnormal state inside the switchboard.

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