KR100895218B1 - Distalized gis-lcp - Google Patents

Abstract

The present invention is provided between a gas insulated switch-gear (GIS) for a substation and a control panel of a switchgear room, which connects both and controls the GIS in a field, wherein the operation state, operation history, and gas filling of the GIS are performed. The present invention relates to a digitized GIS field control system, characterized in that the information is received and digitized, and the digitized information is converted into a predetermined communication protocol and transferred to the control panel of the switchboard room.

Description

Digitized WiFi field control system {DISTALIZED GIS-LCP}

1 is a block diagram showing the configuration of a system for a conventional GIS control.

2 is a block diagram showing a configuration of a system for GIS control according to an embodiment of the present invention.

Figure 3 is a side view showing the installation of the anti-vibration unit according to an embodiment of the present invention.

Figure 4 is a side view showing the installation state of the anti-vibration unit according to another embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

11: command room 12: communication unit

13 control panel 14 second control input and output cable

15: GIS 16: Conventional GIS LCP

17: first input and output control cable

100: GIS LCP according to an embodiment of the present invention

110: housing 120: CPU

130: display unit 140: communication line

150: communication protocol conversion unit 160: relay unit

170: I / O control cable 180: memory card for backup

190: vibration prevention unit

The present invention relates to a GIS field control system. More particularly, the present invention relates to a digitized GIS field control system capable of swiftly and accurately analyzing a GIS by digitizing the GIS field control system and to simplifying the structure.

In general, substation power equipment is mainly composed of gas insulated switch-gear (GIS) and a transformer.

First, GIS is the component that receives the ultra-high voltage (typically 154kV or more) from the power plant. As described above, the voltage delivered to this GIS is ultra-high voltage of 154 kV or more, so perfect insulation is of paramount importance.

This GIS generally consists of detailed equipment with functions for each purpose, such as breakers, disconnectors, earthing switches, and lightning arresters. And the LCP (Local Control Panel) is installed to collect the information on the operation status, operation history and gas filling status of these detailed equipment and deliver it to the control panel.

In addition, the transformer is a component for transforming the ultra-high voltage current transmitted through the GIS to usable special high pressure of about 55kV. The current transformed to low voltage by this transformer is supplied to the field such as for the operation of the train.

Accurate and rapid control of substation power equipment having such a configuration is very important for safe and efficient business operation.

In particular, for the control of the GIS, a method of using both a remote control and a site control is used in parallel. Hereinafter, this will be described in detail with reference to FIG. 1. 1 is a block diagram showing the configuration of a system for a conventional GIS control.

First, the command room 11, the communication unit 12, and the control panel 13 are used for remote control. The control panel 13 is provided with a control device and a relay. First, the control device is connected to the GIS 15 and serves to control the opening or closing of the switch.

In addition, the control panel 13 is further provided with a memory card (not shown in the drawing) for receiving and storing detailed information about the operation state, operation history, and gas filling state of the GIS 15. In addition, the control panel 13 is provided with a second input and output control cable 14 connected to the field control system 16 of the GIS 15 to exchange information.

On the other hand, GIS field control system is used for GIS field control system (also called 'GIS LCP' (Local Controlling Panel)). This GIS field control system 16 is arranged between the GIS 15 and the control panel 13, as shown in FIG. In practice, the GIS field control system 16 is disposed adjacent to the GIS 15, spaced about several meters apart, and spaced apart from the control panel 13 by a distance of several hundred meters or more. Therefore, the GIS field control system 16 can be controlled manually in the field while observing the GIS 15 directly.

In addition to the field control function, the GIS field control system 16 is connected to the detailed facilities constituting the GIS and receives information on the operation status and operation history of each detailed facility, and also delivers the information back to the control panel 13. . Therefore, the GIS field control system 16 is connected to the GIS 15 through the first input / output control cable 17 and also to the control panel 13 via the second input / output control cable 14.

By the way, the conventional GIS field control system 16 is composed of a mechanical combination has a complex and inefficient problem. That is, since it has a mechanical combination, such as a magnetic contactor type auxiliary relay, it does not correspond to the control panel 13 of the switchboard room that is already digitized, and it is expensive to operate and install the substation facility.

In particular, since the GIS field control system 16 is composed of a mechanical combination, the number of input / output control cables 14 connecting the GIS field control system and the control panel 13 of the switchboard room reaches dozens, thereby increasing the installation cost. Maintenance is also a difficult problem.

The technical problem of the present invention for solving the above-mentioned problems is to provide a digitized GIS field control system capable of swift and accurate analysis of the GIS by digitizing the GIS field control system, and to simplify the structure.

In order to solve the above technical problem, the present invention is disposed between a gas insulated switch-gear (GIS) connected to a transformer and a control panel of a switchgear room to connect both of them and to control the GIS in the field of the GIS field control system. A housing having a constant internal volume; A CPU provided inside the housing and configured to receive and digitize the state information of the GIS and the transformer to generate digital signals of the GIS and the transformer state; A communication protocol conversion unit connected to the CPU and converting a digital signal for the GIS and a transformer state into a communication protocol; A display unit connected to the CPU to provide a screen for on-site control of the GIS; An input / output control cable connecting the CPU and the detailed equipment of the GIS; A relay unit connected to the CPU and the GIS, the trip unit controlling a trip of the current when an abnormality occurs in the current flowing between the GIS, the transformer and the field equipment; A communication line connecting the communication protocol conversion unit and the control panel of the switchboard room, transmitting a communication protocol generated by the communication protocol conversion unit to the control panel, and receiving a communication protocol of the control panel. Provide a system.

In this case, it is preferable that the CPU has an IED (Intelligent Electronic Device) to receive the state information of the GIS and transmit it to the digital control system.

Further, it is preferable to further provide a back-up memory card which is connected to the CPU and stores the state information of the digitized GIS.

On the other hand, the communication line is preferably made of an optical cable (or UTP cable), it is preferable to solve the increase in installation costs and maintenance difficulties caused by a large number of conventional input and output control cables. In addition, the use of the optical cable (or UTP cable) as a communication line, there is an advantage that can communicate without being affected by a lot of radio noise generated during the operation of the train.

In addition, between the housing and the bottom surface is further provided with a vibration preventing unit for preventing the vibration of the housing and the internal equipment, it is preferable to be able to operate the GIS field control system stably even at the point where a lot of vibration, such as train power equipment. .

In this case, the anti-vibration part may be an elastic insulation plate or an air spring dustproof mount.

In addition, the housing, the thermostat (thermostat) to maintain a constant temperature inside the housing is further provided, to prevent damage to the equipment due to extreme temperature changes during the operation of the GIS field control system and to ensure stable equipment operation It is preferable to be able.

Hereinafter, with reference to the accompanying Figure 2 will be described in detail a preferred embodiment of the present invention. 2 is a block diagram showing the configuration of the digitized GIS field control system according to the present embodiment.

The digitized GIS field control system according to the present embodiment receives and digitizes information regarding the operation state, operation history, and gas filling state of the GIS, and converts the digitized information into a predetermined communication protocol to the control panel of the switchboard room. It is characterized by transmitting.

To this end, as shown in FIG. 2, the GIS field control system 100 according to the present embodiment includes a housing 110, a CPU (central processing unit) 120, a display unit 130, and a communication line 140. ), A communication protocol conversion unit 150, a relay unit 160, and an input / output control cable 170.

The housing 110 is a component that serves as a frame having a constant internal volume. Inside the housing 110, detailed components constituting the GIS field control system are arranged.

And the CPU 120 is a key component of the GIS field control system 100 according to the present embodiment, is provided in the housing 110 to receive and digitize the status information of the GIS 15 and the transformer, A component that generates digital information of GIS and transformer status. In this embodiment, the CPU 120 includes an Intelligent Electronic System (IED). The IED is an electrical device with artificial intelligence.

The IED according to the present embodiment includes a power module, a CPU module, a communication module, and an input / output module. First, the power module serves to supply power, and the operation module is a part that holds programs such as operation, and the communication module is a module dedicated to upper and lower communication. And I / O module is connected to the site by hardware to collect information and execute commands.

Therefore, the state information of the GIS 15 can be received and transmitted smoothly to the digital control system, which can greatly contribute to the networking and intelligence of the substation.

In addition, the digitized GIS field control system 100 according to the present embodiment may further include a backup memory card 180. The memory card 180 is connected to the CPU 120 to store information on an operation state of the GIS digitized by the CPU 120. The information stored in the memory card 180 may be used as very useful information in case of an accident.

Next, the display 130 is a component connected to the CPU 120 to provide a screen for controlling the GIS. The display unit 130 is a component for performing a function of manually controlling the GIS 15 in the field among the functions of the GIS field control system 130. Therefore, the display unit 130 is shown the configuration of the detailed equipment constituting the GIS (15), and displays the operating status of each equipment in real time.

Next, the input / output control cable 170 is a component that connects the detailed equipment of the CPU 120 and the GIS 15. The input / output control cable 170 connects the GIS 15 and the GIS field control system 100 that are spaced apart by several meters to transmit and control operation state information of detailed facilities constituting the GIS 15. It also plays a role of delivering control information to each detailed facility. Since the input / output control cable 170 is connected to a plurality of facilities, as shown in FIG. 2, the input / output control cable 170 is composed of dozens of input / output control cables.

Next, the communication protocol conversion unit 150 is disposed in connection with the CPU 120 and receives the digital information on the GIS 15 and the transformer state from the CPU 120 and converts the communication information into a communication protocol. In this embodiment, the information about the GIS 15 and the transformer is transmitted to the control panel through the communication line 140, and the control signal of the control panel 13 is received through the communication line 140. Therefore, both the status information and control signals for the GIS 15 and the transformer must be converted to a communication protocol.

Meanwhile, in the present embodiment, the relay 160 is mounted in the GIS field control system. The relay 160 includes a PT (Potential Transformer 162) and a CT (Current Transformer, 164), and if an abnormality occurs in the current flowing between the GIS (15) and the transformer trip (breaking the current flow) trip) Control. At this time, the PT 162 is a component that lowers the ultra-high voltage flowing between the GIS 15 and the transformer, CT 164 serves to lower the amount of current of the ultra-high voltage current flowing between the GIS 15 and the transformer. . Therefore, the relay 160 monitors the current flowing between the GIS 15 and the transformer by using the PT 162 and the CT 164, and cuts off the current to protect the GIS 15 when an error occurs. .

In this embodiment, the relay 160 is not provided separately, but is installed in the GIS field control system 100. Therefore, the separate cable for the relay 160 does not need to be connected to the control panel, there is an advantage that can be integrated control for the GIS 15 and the transformer.

Next, the communication line 140 is a component that connects the CPU 120 and the control panel 13 of the switchboard room. Therefore, the communication line 140 transmits the information digitized by the CPU 120 to the control panel 13 using one communication line, and receives information about the control of the GIS 15 from the control panel 13.

In this embodiment, the communication line 140 is configured by an optical cable. When the communication line 140 is formed of the optical cable as described above, there is an advantage that the input / output control cable, which is conventionally composed of dozens of cables, can be simplified. The communication line 140 connecting the control panel 13 and the GIS field control system 100 is actually installed over a distance of several hundred meters. Therefore, in the case of dozens of cables, not only the cost of installing the input / output control cable is high, and there is a problem in that maintenance becomes difficult. By the way, when this communication line is comprised by one optical cable like this embodiment, the communication cable itself becomes very simple, and there exists an advantage also that maintenance is also easy.

In addition, the place where the GIS 15 is installed is a place where a high voltage is generally used, and a lot of noise is generated during the operation. This noise causes a lot of errors in the information transmission process by a general cable. Therefore, as described above, when the communication line 140 is constituted by an optical cable, there is an advantage that it is free from the influence of such noise.

On the other hand, between the housing 110 and the bottom surface is preferably provided with a vibration preventing unit 190 to prevent the vibration of the housing 110 and the internal equipment. The vibration preventing unit 190 serves to protect the components of the digitized GIS field control system 100 installed in a place where a lot of vibration occurs in the driving process from vibration.

To this end, in the present embodiment, the vibration preventing unit 190 is constituted by an elastic insulation plate or an air spring dust mount. First, in the case of the insulating plate 190, as shown in FIG. 3, the insulating plate is provided on the front surface of the lower surface of the housing 110 to install the housing. At this time, the insulating plate 190 is made of a material excellent in adaptability to chemical changes and chemical resistance.

In addition, in the case of the air spring dustproof mount 190 ′, as shown in FIG. 4, the air spring dustproof mount 190 ′ is disposed at an edge portion of the housing 110 to absorb vibrations received by the housing.

Finally, the housing 110, it is preferable that a thermostat (thermostat (not shown in the figure)) for maintaining a constant temperature inside the housing is further provided. This thermostat keeps the temperature inside the housing 110 constant at all times so that the digitized GIS field control system according to this embodiment maintains the best operating state. Since the digitized GIS field control system according to the present embodiment includes many digital circuits and the like, the thermostat is required because it is sensitive to temperature.

According to the present invention, it is possible to quickly and accurately analyze and diagnose the GIS, and share and exchange information on the operation state of the GIS.

The digitalization of the GIS field control system also simplifies the configuration of the device, reducing production costs and facilitating maintenance work.

Moreover, it will be able to complete the networking and intelligence of the entire substation system in response to IT of the substation system.

In addition, in the present invention, by embedding a relay in the GIS field control system, a cable connected to the control panel is further simplified, and there is an advantage in that the GIS and the transformer can be integratedly controlled.

Claims (9)

In the GIS field control system which is disposed between the gas insulated switch-gear (GIS) connected to the transformer and the control panel of the switchboard room, connecting the two and field control the GIS, A housing having a constant internal volume; A CPU provided inside the housing to receive and digitize the state information of the GIS and the transformer to generate digital signals for the GIS and the transformer state and to control the GIS and the transformer; A communication protocol conversion unit connected to the CPU and converting a digital signal for the GIS and a transformer state into a communication protocol; A display unit connected to the CPU to provide a screen for on-site control of the GIS; An input / output control cable connecting the CPU and the detailed equipment of the GIS to control the GIS; A relay unit connected to the CPU and the GIS and configured to control a trip to cut off the flow of current when an abnormality occurs in the current flowing between the GIS and the transformer; And an optical cable connecting the communication protocol converter and the control panel of the switchboard room, transmitting the communication protocol generated by the communication protocol converter to the control panel, and receiving the communication protocol of the control panel. system. The method of claim 1, wherein the CPU, A digitalized GIS field control system, comprising an Intelligent Electronic Device (IED). The method of claim 1, The relay unit, The GIS field control system is connected between the GIS and the transformer, characterized in that the field trip to receive the voltage and current from the GIS and the transformer. The method of claim 3, And a back-up memory card connected to the CPU for storing the state information of the digitized GIS. delete The method of claim 3, Digitized GIS field control system, characterized in that the vibration prevention portion for preventing the vibration of the housing and the internal equipment is further provided between the housing and the bottom surface. The vibration preventing part of claim 6, Digitalized GIS field control system, characterized by a flexible insulation plate. The vibration preventing part of claim 6, Digitized GIS field control system characterized by an air spring dust mount. The method of claim 3, wherein the housing, And a thermostat for maintaining a constant temperature inside the housing.

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