KR101126292B1 - System and method of opening/closing a gas valve for gas insulated switchgear - Google Patents

Abstract

PURPOSE: A system and method of opening/closing a gas valve for a gas insulated switchgear are provided to minimize damage to a human error by determining the disconnection of a gas compartment and automatically determining the opening and closing of the gas valve. CONSTITUTION: A gas valve(100) controls the exhaustion of a gas within a gas compartment. A sensor unit senses the operation state of the gas compartment. A data transceiver receives sense information and transfers a controls signal to a gas valve. A key input unit inputs the ID of the gas compartment. A display unit indicates the operation information of the gas compartment. A central processing unit generates a control signal opening and closing the gas valve.

Description

SYSTEM AND METHOD OF OPENING / CLOSING A GAS VALVE FOR GAS INSULATED SWITCHGEAR}

The present invention relates to a gas valve opening and closing system and method for a gas insulated switchgear, and more particularly, to detect an operation state of a gas compartment to be checked, and to determine whether the gas compartment is disconnected based on the detected signal. When the gas compartment is in a disconnection state, it relates to a gas valve opening / closing system that can control and discharge the insulation gas of the gas compartment through intelligent electronic devices before the gas compartment inspection.

As most of the switchgear facilities of power plants and substations are constructed with gas insulated switchgear (GIS), the number of facilities of gas insulated switchgear has greatly increased, and the proportion of power in the power system has been increasing. Failure of the insulation switchgear not only causes power supply problems, but also takes a long time to return.

On the other hand, the conventional gas insulated switchgear has the advantages of large capacity transmission and high reliability while reducing the site of the substation, but it is difficult to detect defects during operation and diagnoses to prevent failures because it significantly affects the supply and demand of failures. The system will be essential.

However, to check the gas insulation switchgear, it is necessary to determine whether the gas compartment is disconnected. This is because if the gas is removed while the gas compartment is in operation, the insulation breakdown can destroy the gas insulation switchgear and cause the loss of power system operation due to human accidents and breakdowns.

Previously, the determination of whether the gas insulated switchgear was disconnected by gas compartment was carried out based on the paperwork of the on-site inspector, which implied the possibility of error due to human error. If this change or any other additional factor is to be considered, there is a problem that the inspector must make a judgment on site. Accordingly, there is a need for an electronic operation system capable of determining whether or not the gas of the gas insulation switchgear is discharged as part of a reliable gas insulation switchgear inspection method.

An object of the present invention is to enable the inspector to easily check the information of the gas compartment to be checked from the intelligent terminal device before the gas compartment check.

Another object of the present invention is to provide a gas valve opening / closing system for determining whether the gas compartment of the gas insulation switchgear to be checked is disconnected and automatically opening or closing the gas valve through an intelligent electronic device.

The first invention of the present application, the gas valve opening and closing system for gas insulated switchgear for achieving the above object,

A gas valve that opens and closes to discharge the gas of the gas compartment in the gas insulated switchgear to the outside; A sensor unit for detecting an operation state of a gas compartment to be inspected by the gas insulated switchgear; And an intelligent electronic device configured to determine the disconnection state of the gas compartment based on the detection information of the operation state, and operate the gas valve to discharge the gas to the outside when the gas compartment is in the disconnection state.

Gas valve opening and closing method for a gas insulated switchgear of the present invention includes the steps of sensing the operation state of the gas compartment to be checked by the sensor unit gas insulated switchgear; Collecting, by an intelligent electronic device, sensing information of the operation state; Determining, by the intelligent electronic device, whether the gas compartment is cut off; And generating, by the intelligent electronic device, a control signal for controlling the opening and closing of the gas valve, and transmitting the control signal to the gas valve.

According to the present invention according to the above configuration, there is an effect that the inspector before the gas compartment check can easily check the information of the gas compartment to be checked from the intelligent terminal device.

In addition, it is possible to minimize the damage caused by the human error of the inspector by judging whether the gas insulated switchgear to be disconnected to the gas compartment to determine and automatically determine the opening and closing of the gas valve.

1 is an intelligent gas valve blocking system for a gas insulated switchgear according to an embodiment of the present invention,
2 is an installation of the motion detection sensor according to an embodiment of the present invention,
3 is a block diagram of an intelligent electronic device according to an embodiment of the present invention; and
4 is a flowchart of a gas valve opening and closing method for a gas insulated switchgear according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components, and the same reference numerals will be used to designate the same or similar components. Detailed descriptions of known functions and configurations are omitted.

1 illustrates an intelligent gas valve opening and closing system for a gas insulated switchgear according to an embodiment of the present invention. Referring to FIG. 1, an intelligent gas valve opening and closing system for a gas insulated switchgear is installed in the gas insulated switchgear 10 and opened and closed to discharge gas in each gas compartment to the outside. The unit 200 and an intelligent electronic device (IED) 300 are included.

Gas valve 100 is installed in the gas insulated switchgear 10 is opened and closed to discharge the gas in each gas compartment to the outside. The gas compartment of the gas insulated switchgear 10 is filled with a high pressure insulating gas to maintain the gas insulated state. In general, the gas compartment of the gas insulated switchgear 10 is filled with sulfur hexafluoride (SF6), and each gas compartment is designed to block the gas by blocking the partition partition spacer. Therefore, even if one of the gas compartments is disconnected from the power source and grounded, the gas is drawn out to check the gas compartments, and the remaining sections can continue to operate. The gas valve 100 is controlled to discharge the insulating gas in the gas compartment to the outside by the intelligent electronic device 300.

The gas valve 100 may be operated electronically by an electrical signal of the intelligent electronic device 300, and as illustrated in FIG. 2, the gas valve 100 may be manually opened and closed by manipulating the handle 110. When the handle 110 is rotated in one direction, the gas valve 100 is opened to discharge the outside gas, and when the handle 110 is rotated in the opposite direction, the gas valve 100 is closed to stop the discharge of the insulating gas.

The sensor unit 200 detects whether the gas compartment is separated from the power source and grounded, that is, whether the gas compartment is energized / disconnected and transmits the sensing information to the intelligent electronic device 300. If the gas valve is operated and the gas is discharged while the gas compartment continues to flow current, insulation breakdown may occur and this may expose a person to a risk of human accident or a large power outage, so the gas compartment is completely disconnected from the power source. After confirming that the gas valve 100 to operate. The sensor unit 200 may monitor a contact point of a circuit breaker (CB) and sense input / open information of the breaker.

The sensor unit 200 may include a current voltage detection sensor 210 that detects current and voltage of a line in the gas compartment. The current voltage detection sensor 210 may include a current transformer (CT) as a current detection sensor and a voltage transformer (VT) as a voltage detection sensor. In the case of using a current transformer and an instrument transformer for current and voltage detection, the signals generated therefrom are analog signals, and thus, the intelligent electronic device 300 includes an A / D converter to convert analog signals into digital signals. The operation must be performed afterwards.

According to another embodiment of the present invention, the current voltage detection sensor 210 may be a Non Conventional Instrument Transformer (NCIT). Unlike current transformers and instrument transformers, NCITs do not have a central core and transmit current and current data through fiber optical cables. In this case, since the transmitted data is digital data rather than analog data, a separate A / D converter may not be included between the intelligent electronic device 300 and the NCIT when NCIT is used.

The sensor unit 200 may further include a motion detection sensor 220 that monitors operations of a gas breaker, a disconnecting switch (DS), and an earth switch (ES). The motion detection sensor 220 may photograph information on an operation state of the disconnector and the ground switch in the gas compartment and transmit the information to the IED 300 in the form of image data. The motion detection sensor 220 is a kind of vision module that checks the operation state of the disconnector and the ground switch. The vision module may include a camera module including any one of CMOS, CCD, and NMOS.

The motion detection sensor 220 is installed in the monitoring window 11 of the gas insulated switchgear 10 to monitor the operation of the disconnector and the ground switch in the gas compartment.

3 is an installation diagram of a motion detection sensor according to an embodiment of the present invention. As shown in Figure 3, the gas insulated switchgear 10 is provided with a monitoring window 11 for monitoring the operating state of the internal disconnector or the grounding switch, the user through the monitoring window 11 to the naked eye The operating status of disconnectors or grounding switches can be monitored. At this time, by installing the motion detection sensor 220 on the upper portion of the monitoring window 11, it is possible to monitor the operation state of the disconnector or the grounding switch without manpower.

The intelligent electronic device 300 receives the input or open state information of the breaker for each gas compartment, information on the voltage and current of the line, operation information of the disconnector or the ground switch from the sensor unit 200, and based on the received information. The gas compartment to be checked is separated from the power source, and it is determined whether the line is in the inactive state, and it is determined whether the gas valve 100 is opened or closed. When the information related to the gas compartment to be checked by the intelligent electronic device 300 is input through the external input of the inspector, the intelligent electronic device 300 is based on the operation information of the corresponding gas compartment received from the sensor unit 200. It is possible to determine whether the gas compartment is disconnected and determine whether the gas valve 100 is opened or closed. At this time, in order to identify the gas compartment of the gas insulated switchgear 10, an identification code designating each gas compartment may be given, and the inspector inputs the identification code into the intelligent electronic device 300, thereby checking the gas compartment to be checked. Can be specified.

In order to prevent the intelligent electronic device 300 from malfunctioning and accidentally leaking the insulating gas to the outside, the intelligent electronic device 300 may include a latch circuit that determines whether the control function of the gas valve 100 is performed. 470). That is, while the latch circuit 470 is maintained in the intelligent electronic device 300, the intelligent electronic device 300 automatically opens or closes the gas valve 100 based on the information received from the sensor unit 200. Although the control may be controlled, the intelligent electronic device 300 does not control the opening and closing of the gas valve 100 while the latch circuit 470 maintains the off state, and the inspector may manually open and close the gas valve 100. Can be. The latch circuit 470 operates as a switch for performing the opening / closing function of the gas valve 100 in the intelligent electronic device 300, thereby opening the gas valve 100 only while the gas compartment inspector checks the gas compartment. In addition, the inspector may check whether the opening condition of the gas valve 100 is satisfied before performing the opening / closing of the gas valve 100, thereby preventing the risk of the intelligent electronic device 300 from occurring in advance.

4 is a block diagram of an intelligent electronic device according to an embodiment of the present invention.

Referring to FIG. 4, the intelligent electronic device 300 includes a data transceiver 410, a key input unit 420, a display unit 430, a central processing unit 440, and a power supply unit 450. In addition, the intelligent electronic device 300 may further include an image processor 460 and a latch circuit 470.

The data transmitting / receiving unit 410 receives the sensing information regarding the operation information of the gas compartment from the sensor unit 200 and transmits a control signal for opening and closing the gas valve 100 to the gas valve 100.

In this case, the data transmission / reception unit 410 and the sensor unit 200, the data transmission / reception unit 410, and the gas valve 100 may perform wired communication or wireless communication. In case of wired communication, it is connected by analog signal line, RS232, RS422, RS485 type serial communication, Ethernet communication can be used, and in case of wireless communication, wireless LAN, Zigbee, Bluetooth or Binary CDMA can be used. The data transceiver 410 may include an A / D block (not shown) capable of converting an analog signal into a digital signal.

The inspector may set power on / off of the intelligent electronic device 300 through the key input unit 420 and input information on a gas compartment to be checked.

The display unit 430 displays the key operation state of the inspector on the screen, and displays operation information of the gas compartment to be checked, which is specified by the key input unit 420.

The central processing unit 440 specifies a gas section to be checked based on an external input of the inspector through the key input unit 420, and checks the gas section based on detection information received from the sensor unit 200 for the corresponding gas section. It is determined whether the gas compartment is in the disconnected state to determine whether the gas valve 100 is opened or closed.

For example, if the current and voltage value of the line in the gas compartment to be checked converge to 0, the switch and disconnector are operated to cut off the power in the gas compartment, and the ground switch is connected to earth, the gas compartment to be checked The control signal for opening the gas valve 100 may be generated by determining that the power supply is completely separated from the power source.

In this case, the operation state information of the circuit breaker and the ground switch may be obtained from the image processor 460. The motion detection sensor 220 of the sensor unit 200 generates image information of the circuit breaker and the ground switch by using the image pickup device, and the image processing unit 460 is based on the image information received from the motion detection sensor 220. Image data about the operation of the ground switch is processed. The image data is processed to analyze the opening and closing operation information of the circuit breaker and the ground switch, and transmits the operation information of the circuit breaker and the ground switch to the central processing unit 440. The image processor 460 is a function unit for processing digital signals with respect to image information at high speed, and operates as an auxiliary processor separate from the central processor 440.

The latch circuit 470 may be involved in generating a control signal for opening / closing the gas valve 100 of the intelligent electronic device 300 based on a user input from the outside. While the latch circuit 470 maintains the On state, the intelligent electronic device 300 may generate a control signal for controlling the opening and closing of the gas valve 100, while the latch circuit 470 maintains the Off state. The electronic device 300 may not generate a control signal. On and off of the latch circuit 470 means a signal opposite to each other in the digital signal, for example, 1 and 0, high and low signals. For example, when generating the control signal, the central processing unit 440 may connect the output value of the latch circuit 470 to an AND condition so that whether the control signal is generated depends on the output value of the latch circuit 470. The latch circuit 470 is connected to the key input unit 420 so that the on / off can be adjusted by the key operation signal of the inspector.

The power supply unit 450 supplies power so that each functional unit of the intelligent electronic device 300 can operate. At this time, the power supply unit 450 preferably includes a rechargeable battery capable of charging and discharging.

5 is a flowchart of a gas valve opening and closing method for a gas insulated switchgear according to an embodiment of the present invention.

In the operation state detecting step of the gas insulated switchgear 10 (S510), the sensor unit 200 opens and closes the circuit breaker for each gas section of the gas insulated switchgear 10, detects current and voltage of the line, disconnects and grounds. It is a step of detecting the operation of the gas insulated switchgear 10, such as the operation state of the switch. For current and voltage detection of the line, the instrument current transformer and instrument transformer can be used or NCIT can be used, and the motion detection sensor 220 can be used to check the operation of the disconnector and the ground switch.

In the step of collecting the detected information (S520), the intelligent electronic device 300 inputs the opening and closing state information of the circuit breaker from the sensor unit 200, information on the voltage and current of the line in the gas compartment to be checked, disconnector or ground switch Receiving operation information of the.

The gas compartment disconnection determination step (S530) is a step in which the intelligent electronic device 300 determines whether the corresponding gas compartment is disconnected from the power source and is in an electrical disconnection state based on the operation information of the gas compartment received from the sensor unit 200. .

When the gas compartment to be checked is in the power cut state, the intelligent electronic device 300 checks the on / off state of the latch circuit 470 (S540), and when the state of the latch circuit 470 is On, the gas valve ( Open 100) to release the insulating gas in the gas compartment to the outside (S550), so that the inspector can check the gas compartment.

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. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

10 gas opening and closing device 11 monitoring window
100: gas valve 200: sensor
210: current voltage detection sensor 220: motion detection sensor
300: intelligent electronic device 410: data transmission and reception unit
420: key input unit 430: display unit
440: central processing unit 450: power supply
460: image processing unit 470: latch circuit

Claims (12)

A gas valve for controlling the discharge of the gas in the gas compartment of the gas insulated switchgear;
A sensor unit for detecting an operation state of a gas compartment to be inspected by the gas insulated switchgear; And
And an intelligent electronic device configured to determine the disconnection state of the gas compartment based on the detection information of the operation state, and operate the gas valve to discharge the gas to the outside when the gas compartment is in the disconnection state.
The intelligent electronic device receives the sensing information from the sensor unit, a data transceiver for transmitting a control signal to the gas valve, a key input unit for inputting identification information of the gas compartment, an operation state of the key input unit and the gas. A gas valve opening / closing device for a gas insulated switchgear including a display unit for displaying operation information of a compartment and a central processing unit for determining a disconnection state of the gas compartment based on the sensed information and generating a control signal for opening and closing the gas valve. system.
The method of claim 1, wherein the operating state,
A gas valve opening and closing system for a gas insulated switchgear including at least one of an open / close state of a breaker, an energized state of a line in a gas compartment, an open state of a disconnector, and an open state of a ground switch.
The method of claim 1, wherein the sensor unit,
Gas valve opening and closing system for gas insulated switchgear including a current voltage sensor for sensing the current and voltage of the line.
The method of claim 3, wherein the current voltage detection sensor,
Gas valve opening and closing system for gas insulated switchgear characterized in that the instrument current transformer and instrument transformer.
The method of claim 3, wherein the current voltage detection sensor,
Gas valve opening and closing system for gas insulated switchgear characterized in that the NCIT.
The method of claim 1, wherein the sensor unit,
Gas valve opening and closing system for a gas insulated switchgear including a motion sensor for detecting the operation of the disconnector and the ground switch.
The method of claim 6, wherein the motion detection sensor,
And a camera module, wherein the camera module is any one of a CCD, a CMOS, and an NMOS.
delete The method of claim 1, wherein the intelligent electronic device,
And a latch circuit, wherein generation of the control signal is determined based on an output value of the latch circuit.
The method of claim 1, wherein the intelligent electronic device,
And an image processing unit, wherein the image processing unit determines the disconnection state of the gas compartment based on the image information received from the sensor unit.
Receiving identification information of a gas compartment to be checked through a key input unit of the intelligent electronic device;
Detecting, by a sensor unit, an operation state of the gas compartment to be checked of the gas insulation switchgear;
Receiving, by the intelligent electronic device, sensing information of the operation state from the sensor unit;
Determining, by the intelligent electronic device, the disconnection state of the gas compartment based on the sensing information;
Generating, by the intelligent electronic device, a control signal for controlling the opening and closing of a gas valve, and transmitting the control signal to the gas valve; And
Displaying, by the intelligent electronic device, an operation state of the key input unit and operation information of the gas compartment;
Gas valve opening and closing method for a gas insulated switchgear comprising a.
The method of claim 11, wherein the control signal,
And a gas valve opening / closing method according to an output value of a latch circuit of the intelligent electronic device.

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