KR100780898B1 - Monitoring device for an electric facilities - Google Patents

Abstract

A monitoring device for an electric facility is provided to output a control signal for alarm and locking in case of rapid variation of internal pressure and temperature of the electric facility, by measuring pressure and temperature in a number of gas sections at the same time with one device. A pressure/temperature sensor is installed in each gas section of an electric facility with a number of gas sections. An integrated monitoring unit is installed in the electric facility and is connected to each pressure/temperature sensor, and converts sensor signals into digital signals, and calculates and displays density in each gas section, and outputs a control signal for alarming and locking when the calculated density is out of a safe density range.

Description

MONITORING DEVICE FOR AN ELECTRIC FACILITIES}

1 is a schematic structural diagram of an electric device equipped with a monitoring device according to the present invention

2 is a schematic structural diagram of a monitoring device for an electric machine according to the present invention;

3 is a front view of the monitoring device for an electric machine according to the present invention.

4 is a rear view of the monitoring device for an electric machine according to the present invention.

Explanation of symbols on the main parts of the drawings

1: Monitoring device for electric equipment

3: electric equipment

5: power

7: external computer

10: pressure / temperature sensor

20: integrated monitoring means

30: input conversion unit

40: A / D converter

50: central operation control unit

60: control signal generator

70: display unit

80: key input unit

90: power supply

100: communication module

110: filter unit

120: linear processing unit

The present invention relates to a monitoring device for an electric device having a plurality of gas compartments, and more particularly, to alarm when a sudden change in the internal pressure and temperature of the electrical device by measuring the pressure and temperature in a plurality of gas compartments at the same time with one device And a control device for a determination and a communication module mounted thereon, so that communication with an external computer at a remote location enables monitoring and control of an electrical device at a remote location. will be.

In recent years, insulating medium, such as a stable power supply and a large capacity, in accordance with the miniaturization is excellent in insulating performance inside the enclosure (TANK) grounding of electrical equipment SF ₆ gas of the electric machine (SF ₆ gas, dry air (Dry Air), nitrogen Gas and the like).

In the case of such electric equipment, the internal pressure and temperature of the enclosure of the electric equipment may be reduced or increased due to leakage of the insulating medium and abnormal voltages and currents from inside and outside, which may lead to a serious accident.

In recent years, in order to minimize the risk of accidents and reduce the ripple effect, electrical equipment that increases safety by separating the TANK into a plurality of gas compartments has been commercialized.

In the case of such electric equipment, the inside of the enclosure can be operated without abnormality only when the inside of the enclosure is maintained at an appropriate pressure and temperature, for which a pressure gauge or a density meter is installed.

In the case of a conventional electric device having a large number of gas compartments, one pressure gauge or density meter must be installed for each gas compartment. In this case, there is a burden of purchasing a plurality of pressure gauges or density meters. There was also a problem in that the precision was low due to the pressure gauge to the density gauge.

In addition, in order to check a large number of pressure gauges or density gauges, the inspector must go to the installation place of the electric equipment and visually check and take appropriate measures. Therefore, the monitoring of the electric equipment is very difficult and the periodic inspection is difficult. There was a problem.

Accordingly, an object of the present invention is to monitor the pressure and temperature in a plurality of gas compartments with one device at the same time to monitor the electrical equipment to output a control signal for alarm and correction when a sudden change in the internal pressure and temperature of the electrical equipment To provide a device.

Another object of the present invention is to provide a monitoring device for an electric device that is equipped with a communication module to enable communication with an external computer at a remote location so that the monitoring and control of the electric device can be easily performed even at a remote location.

The object of the present invention described above is a pressure / temperature sensor respectively installed for each gas compartment of an electric apparatus having a plurality of gas compartments, and the pressure / temperature sensors respectively installed in the electric apparatus and connected to the pressure / temperature sensors. Integrated monitoring that converts and calculates sensor signals input from sensors into digital signals to simultaneously calculate and display the density in each gas compartment and output a control signal for alarm or correction when the calculated density value is outside the set safety density range. It is achieved by providing a monitoring device for an electrical appliance comprising means.

According to a preferred feature of the invention, the integrated monitoring means, an input conversion unit for converting the sensor signals input from the pressure / temperature sensors into a voltage value, connected to the input conversion unit and received from the input conversion unit An A / D converter for converting a voltage value into a digital signal, a central calculation controller for calculating and measuring the density of each gas compartment based on digital signals connected to the A / D converter and input through the A / D converter; A control signal generation unit connected to the central operation control unit and outputting a control signal for alarm or determination when the density value calculated by the central operation control unit is out of a set safety density range, and connected to the central operation control unit and connected to the central operation control unit. A display unit which digitally displays the density of each of the gas compartments calculated and calculated by the operation control unit, and the central operator And a key input section which is connected to the unit it is possible to set the mode of operation or safety density range, is provided in the integrated monitoring unit comprises a power supply for supplying power required for operation from an external power source.

According to a more preferred feature of the invention, the integrated monitoring means, connected to the central computing control unit to enable communication with an external computer at a remote location to monitor the density in the electrical device through a remote computer at a remote location It further comprises a communication module.

According to a further preferred feature of the invention, the integrated monitoring means, the filter unit for removing noise from the voltage value interposed between the input conversion unit and the A / D converter and output from the input conversion unit, and the filter unit And a linear processor interposed between the A / D converter and linearizing a voltage value passed through the filter unit and providing a linearized constant value to the A / D converter.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are intended to describe in detail enough to be easily carried out by those skilled in the art to which the present invention pertains. This does not mean that the technical spirit and scope of the present invention is limited.

1 is a schematic structural diagram of an electric apparatus equipped with a monitoring apparatus according to the present invention, FIG. 2 is a schematic structural diagram of a monitoring apparatus for an electric apparatus according to the present invention, and FIGS. 3 and 4 according to the present invention. Front and back views of the monitoring device for the appliance are shown.

The monitoring device 1 for an electric machine according to the present invention can measure pressure and temperature in a plurality of gas compartments simultaneously with one device, and is equipped with a communication module so that communication with an external computer at a remote location is possible. In order to facilitate monitoring and control of the electric device, as shown in FIGS. 1 to 4, each gas compartment of the electric device 3 having a plurality of gas compartments 3a, 3b, 3c and 3d. Pressure / temperature sensors 10 installed in each of 3a, 3b, 3c, and 3d, and installed in the electric machine 3 and connected to pressure / temperature sensors 10, respectively, and pressure / temperature sensors 10 By converting and calculating the sensor signals input from the digital signal, the density in each gas compartment 3a, 3b, 3c and 3d can be simultaneously calculated and displayed.If the calculated density value is outside the set safety density range, Output control signal And integrated monitoring means 20.

The pressure / temperature sensor 10b is a pressure in each gas compartment 3a, 3b, 3c and 3d of the electric machine 3 having a plurality of gas compartments 3a, 3b, 3c and 3d as shown in FIG. And by measuring the temperature and transferring the temperature to the integrated monitoring means 20 which will be described later, each gas compartment 3a, 3b, 3c and 3d is installed.

In general, when an electrical accident occurs in the electric device 3, the insulation gas deteriorates and decomposes, and the internal pressure and temperature rise rapidly. When the insulation gas in the electric device 3 leaks to the outside, the internal pressure drops and the insulation is performed. Since there is a risk of ground faults and electrical accidents due to deterioration of performance, in the case of the monitoring device 1 for an electric machine according to the present invention, the pressure and temperature in each gas compartment 3a, 3b, 3c and 3d of the electric machine 3 Monitoring as a parameter is essentially provided with the above-described pressure / temperature sensor 10.

The sensor signals output from the above-described pressure / temperature sensor 10 are input to the integrated monitoring means 20 installed in the electric device 3, which is provided from the pressure / temperature sensors 10. Convert and calculate the input sensor signals into digital signals to simultaneously calculate and display the density in each gas compartment 3a, 3b, 3c and 3d and control for alarm or correction when the calculated density value is outside the set safety density range As shown in FIG. 2, the input signal is connected to the input conversion unit 30 and the input conversion unit 30 for converting the sensor signals input from the pressure / temperature sensors 10 into voltage values, as shown in FIG. 2. Based on the A / D converter 40 for converting the voltage value received from the converter 30 into a digital signal, and the digital signals connected to the A / D converter 40 and input through the A / D converter 40. At the densities of the respective gas compartments 3a, 3b, 3c and 3d Outputs a control signal for alarm or correction when the density calculation value connected to the central operation control unit 50 and the central operation control unit 50 and calculated by the central operation control unit 50 is outside the set safety density range. A display connected to the control signal generator 60 and the central computation controller 50 and digitally displaying the densities of the respective gas compartments 3a, 3b, 3c and 3d computed and measured by the central computation controller 50. A unit 70, a key input unit 80 connected to the central operation control unit 50 and enabling the setting of an operation mode or a safety density range, and provided in the integrated monitoring means 20 and from an external power source 5 It comprises a power supply unit 90 for supplying power for operation.

Here, the input conversion unit 30 converts the sensor signals input from the pressure / temperature sensors 10 into voltage values, and the pressure / temperature sensors 10 usually have a current value corresponding to the detected pressure or temperature. The output signal is converted into a sensor signal, and the input conversion unit 30 converts the current value into a corresponding voltage value and provides it to the A / D converter 40.

As shown in FIG. 4, the input conversion unit 30 is installed at the rear of the integrated monitoring means 20 and is provided at each pressure / temperature of each of the gas compartments 3a, 3b, 3c and 3d of the electric machine 3. The sensor 10 includes a plurality of sensor connection terminals 31 to which the sensors 10 are connected, and preferably includes four sensor connection terminals 31 so as to monitor up to four gas compartments simultaneously.

The above-described input converter 30 is connected to the A / D converter 40. The A / D converter 40 converts the voltage value received from the input converter 30 into a digital signal, which will be described later. The central operation controller 50 to be a kind of digital operation device, the A / D converter 40 is a voltage value received from the input conversion unit 30 to enable the digital operation of the central operation control unit 50 Is converted into a digital signal.

The A / D converter 40 is connected to the central operation control unit 50. The central operation control unit 50 is based on the digital signals input through the A / D converter 40, respectively, the gas compartments 3a. , 3b, 3c, and 3d) to calculate and measure the density and provide it to the display unit 70 to be described later, and provide the corresponding signal to the control signal generator 60 when the calculated and measured density value is outside the set safety density range. A type of central processing unit that sets an operation mode or a safety density range in accordance with an input signal input from a key input unit 80, which will be described later, wherein a printed circuit board on which a predetermined circuit is printed or a chip in which a predetermined circuit is integrated. Is implemented.

The control signal generation unit 60 is connected to the above-described central operation control unit 50. The control signal generation unit 60 has a density calculated and calculated by the central operation control unit 50 due to an electrical accident or leakage of an insulating singer. If the value is out of the set safety density range, by outputting a control signal for alarm or lockout, the alarm sound is output to the outside through a predetermined alarm means (not shown) connected to the control signal generator 60, the administrator is appropriate It is possible to take an action or to allow the operation of the electric device 3 to be automatically interrupted by a predetermined locking means (not shown) connected to the control signal generator 60.

As shown in FIG. 4, the control signal generator 60 includes a control signal output terminal 61 which is installed at the rear of the integrated monitoring means 20 and outputs a control signal for alarm or lockout. The alarm means and the locking means described above are electrically connected to the control signal output terminal 61.

The display unit 70 is connected to the above-described central operation control unit 50, and the display unit 70 controls each of the gas compartments 3a, 3b, 3c, and 3d computed and measured by the central operation control unit 50. As shown in FIG. 3, the density is digitally displayed. The density display panel is installed in the center of the front side of the integrated monitoring means 20 and the density calculated and calculated by the central operation control unit 50 is displayed as a digital number. 71), a pressure accuracy display window 73 installed in an arc shape on the front side of the integrated monitoring means 20 and displaying the degree of the measured pressure of the gas compartment; and a pressure level on the front side of the integrated monitoring means 20. Safety range display window 75 is installed in the concentric arc of the display window 73 and the safety range and up and down risk range is continuously displayed, and installed on the front side of the integrated monitoring means 20 and the control signal generator 60 Of control signals for alarm or correction by means of It comprises the two operating display lamp to display whether or not each output (77, 79).

A key input unit 80 is connected to the above-described central operation control unit 50. The key input unit 80 allows setting of an operation mode or a safety density range, and the like, as shown in FIG. An up / down button 81 provided at the lower part of 71 to enable selection of gas compartments 3a, 3b, 3c and 3d, a mode selection button 83 to enable setting of the operation mode, and safety It is preferable to include a safety range setting button 85 to set the density range.

The integrated monitoring means 20 is provided with a power supply unit 90, which supplies power for operation from an external power source 5, as shown in FIG. And a power connection terminal 91 to which the power source 5 is connected. The external power source 5 is preferably a DC voltage for the stable operation of the integrated monitoring means 20.

Preferably, the integrated monitoring means 20 further includes a communication module 100 connected to the central operation control unit 50. The communication module 100 can communicate with an external computer 7 at a remote location. In order to monitor the density in the electrical device through the external computer 7 of the remote place, it is preferable that the wired communication module such as a modem or a known wireless communication module such as Bluetooth.

The integrated monitoring means 20 described above further includes a filter unit 110 interposed between the input converter 30 and the A / D converter 40 to remove noise from a voltage value output from the input converter 30. And a linear processor 120 interposed between the filter unit 110 and the A / D converter 40 to linearize a voltage value passed through the filter unit 110 and provide a linearized constant value to the A / D converter 40. ) May be further included.

Since the abnormal voltage may be included in the electric device 3 through which a high voltage of tens of thousands of volts flows, the filter unit 110 is installed to remove the abnormal voltage, and the filter unit 110 has a low frequency range filter. Pass filter).

According to the monitoring apparatus for an electric machine according to the present invention as described above, by measuring the pressure and temperature in a plurality of gas compartments at the same time with one device without having to install a separate pressure gauge or density meter for each gas compartment of the electrical equipment When there is a sudden change in the internal pressure and temperature, there is an advantage that can output a control signal for alarm and correction.

In addition, as the internal pressure and density in the gas compartment are digitally displayed, the accuracy can be guaranteed.

In addition, since the communication module is mounted to allow communication with an external computer at a remote location, there is an excellent effect that the monitoring and control of the electric device can be easily performed at a remote location without the inspector moving to the installation place of the electric device.

Claims (4)

A pressure / temperature sensor respectively installed for each gas compartment of the electric device having a plurality of gas compartments; And Calculated and displayed at the same time by calculating and displaying the density in each gas compartment by converting and calculating the sensor signals installed in the electrical equipment and connected to the pressure / temperature sensors and input from the pressure / temperature sensors into digital signals. Integrated monitoring means for outputting a control signal for alarm or lockout when out of the set safety density range. The method according to claim 1, wherein the integrated monitoring means, An input converter converting the sensor signals input from the pressure / temperature sensors into voltage values; An A / D converter connected to the input converter and converting a voltage value received from the input converter into a digital signal; A central operation control unit for calculating and measuring the density of each gas compartment based on digital signals connected to the A / D converter and input through the A / D converter; A control signal generator connected to the central operation controller and outputting a control signal for alarm or correction when the density value calculated and calculated by the central operation controller is out of a set safe density range; A display unit connected to the central operation control unit and digitally displaying the density of each gas compartment calculated and measured by the central operation control unit; A key input unit connected to the central operation control unit to enable setting of an operation mode or a safety density range; And And a power supply unit provided in the integrated monitoring means and supplying power required for operation from an external power source. The method of claim 2, wherein the integrated monitoring means, And a communication module connected to the central operation control unit and enabling communication with an external computer at a remote location to monitor the density in the electric device through a remote external computer at a remote location. Device. The method of claim 2 or 3, wherein the integrated monitoring means, A filter part interposed between the input conversion part and the A / D converter and removing noise from a voltage value output from the input conversion part, and interposed between the filter part and the A / D converter and passing through the filter part. And a linear processing unit linearizing the voltage value and providing the linearized constant value to the A / D converter.

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