KR100923283B1 - Nuclear Power Plants Communication System Using Multiplex Line Communication - Google Patents

Abstract

PURPOSE: A communication system of an atomic power plant using a multiplex line communication is provided to be utilized in the Ethernet communication field using Ethernet communication and power line communication. CONSTITUTION: A communication system of an atomic power plant using a multiplex line communication comprises an MLC(Multiplex line carrier) modem and an MLC master control unit(110). The MLC modem transmits a data signal of the TCP/IP form by using a page phone line within the atomic power plant. The MLC master control unit receives a page phone communication signal transmitted through the MLC modem and communicates with a communication device through an Ethernet switch.

Description

Nuclear Power Plants Communication System Using Multiplex Line Communication

The present invention relates to multiplex line communication, and more particularly, to multiplex line carrier (MLC) capable of Ethernet communication of power line communication or page phone communication in a nuclear power plant using three-phase power and page phone. It is about.

The main building of nuclear power plant is made of thick concrete structure for shielding radiation, so electromagnetic waves are blocked by concrete, so wireless communication is not easy.

In addition, there is a risk of malfunction of measurement and control equipment such as relay due to electromagnetic and harmonics generated when using wireless communication. In addition, wireless communication auxiliary facilities generally use radios having a large output (0.5 W or more), which is not suitable for nuclear power plants because electromagnetic interference is a concern for measurement and control equipment.

For this reason, only wired and wireless communication devices using page phones were available for nuclear power plants. In other words, power generation facilities, ships, factories, construction sites, etc., mainly uses the page phone, the industrial operation command broadcasting equipment used by the driver, these page phone devices are broadcast through the broadcast to people working in the factory or office site, etc. After making a call, you have a system that uses a handset or a portable device to talk between the caller and the called party.

Due to the peculiarity of nuclear power plants, communication systems in power plant facilities are in general weak and there is a system that can cause big problems in establishing new communication lines. The technology propagation speed is low.

The laying of the tracks necessary to build a LAN in such a nuclear power plant facility is a very complicated construction of the nuclear power plant.

An object of the present invention for solving the above-mentioned problems is to provide a communication system of a nuclear power plant using multiplex line communication (MLC) capable of LAN construction and communication using power lines and page phone lines in a nuclear power plant. .

In order to solve the above problems, a communication system of a nuclear power plant using multiplex line communication (MLC) according to the present invention uses a page phone line in a nuclear power plant using a TCP / IP data signal (page phone). A multiplex line carrier (MLC) modem for transmitting a communication signal and a telephone line carrier (TLC); And an MLC master controller configured to receive communication with the page phone communication signal transmitted through the MLC modem and to communicate with communication equipment via an Ethernet switch.

In addition, a communication system of a nuclear power plant using multiplex line communication (MLC) according to the present invention is connected to each outlet in a nuclear power plant, and a data signal of a TCP / IP type (power line) to a power line established between the same phases. PLC) for transmitting a power line carrier; MLC (Multiplex) transmits TCP / IP type data signal (page phone communication signal, TLC (Telephone line carrier)) using page phone line in nuclear power plant, and transmits the signal transmitted from PLC modem line carrier); And an MLC master control unit receiving power line signals or page phone communication signals transmitted through the MLC modem to enable communication with communication equipment via an Ethernet switch.

Here, the MLC master control unit includes: an OFDM modem chip for performing OFDM (orthogonal frequency division multiplex) modulation and demodulation; An analog-front end chip (AFE) for converting the demodulated signal through the OFDM modem chip into an analog signal; An impedance matching transformer for transmitting the analog signal to a telephone line or a power line; And a hybrid transformer for combining the OFDM modulated signal and the voice telephone signal.

In addition, a communication system of a nuclear power plant using multiplex line communication (MLC) according to the present invention is connected to each outlet in a nuclear power plant, and a data signal of a TCP / IP type (power line) to a power line established between the same phases. PLC) for transmitting a power line carrier; MLC (Multiplex) transmits TCP / IP type data signal (page phone communication signal, TLC (Telephone line carrier)) using page phone line in nuclear power plant, and transmits the signal transmitted from PLC modem line carrier); An MLC module for receiving a power line signal or a page phone communication signal transmitted through the MLC modem to enable communication with communication equipment via an Ethernet switch; R, S and T phase master PLC module for converting power signal into communication signal to enable power line communication for each phase from the switchboard in nuclear power plant and to communicate with slab PLC modem, and the R, S and T phase master PLC And a PLC module which is a three-phase power line communication device sharing the Ethernet switch which receives signals from the module and switches the communication between the slab PLC modems using the R, S, and T phase powers, respectively. have.

Here, the MLC master control unit includes: an OFDM modem chip for performing OFDM (orthogonal frequency division multiplex) modulation and demodulation; An analog-front end chip (AFE) for converting the demodulated signal through the OFDM modem chip into an analog signal; An impedance matching transformer for transmitting the analog signal to a page phone line or a power line; And a hybrid transformer for combining the OFDM modulated signal and the voice telephone signal.

Here, the R phase master PLC module is Group1, the S phase master PLC module is Group2, and the T phase master PLC module is grouped into Group3, and a plurality of R, S and T phase slab PLC modems may be added for each phase. The several R-phase slab PLC modems are grouped into Group1, the several S-phase slab PLC modems into Group2, and the several T-phase slab PLC modems are grouped into Group3, wherein the R, S, and T-phase master PLC modules and R, Communication between the S and T phase slab PLC modems is performed in the same group directly between the R, S, and T phase master PLC modules and the R, S, and T phase slab PLC modems. It is desirable to implement so that.

Here, the R, S and T phase power supply, which is installed for each floor of the vessel configured to receive commercial power from the distribution panel that distributes power from the distribution panel, is a medium for connecting the R, S, and T phase slab PLC modems to the power line. Further comprising an outlet, the R, S and T phase slab PLC modem is preferably a plug-in type PLC modem of the type plugged into the R, S and T phase power outlets.

According to the configuration of the present invention described above, it is possible to provide a communication system of a nuclear power plant using multiplex line communication (MLC) capable of LAN construction and communication using power lines and page phone lines in a nuclear power plant.

Hereinafter, with reference to the accompanying drawings will be described the configuration and effect of the communication system of a nuclear power plant using multiplex line communication (MLC) according to the present invention.

The MLC (Multiplex Line Carrier) specified in the present invention is interpreted to mean a generic name capable of one or more communication of PLC (Power line carrier, power line communication) and TLC (Telephone line carrier, page phone communication). In the nuclear power plant, page phone communication is performed in consideration of specificity, and the present invention is configured to enable Ethernet communication using such page phone communication.

1 is a schematic diagram of a communication system of a nuclear power plant using multiplex line communication (MLC) according to the present invention.

As shown, the communication system of the nuclear power plant using multiplex line communication (MLC) according to the present invention MLC master control unit 110 to control the Ethernet communication using the page phone (page phone) and power line communication MLC slab modem (121, 131) to communicate with the MLC master control unit 110 and directly connected to the page phone in a 2Wire manner to enable communication with various Ethernet network equipment (122, 123, 132, 133), It includes a PLC modem connected to the outlet located in each place in a 2Wire manner to enable communication with various Ethernet network equipment 160.

The MLC master controller 110 enables Ethernet communication between MLC slab modems 121 and 131 and various Ethernet network devices 120, 130 and 160 connected to a PLC modem through a page phone communication line and a power line. Through the main server PC 150, it is possible to have a configuration capable of networking with the office using the existing communication network 140 in the office.

The MLC communication scheme in such a nuclear power plant is described in detail with reference to FIGS. 2 to 4. 2 is a communication system for enabling TLC (Telephone line carrier) Ethernet communication using a page phone communication line through an MLC master control unit, and FIG. 3 is a TLC (Telephone line carrier) using a page phone communication line through an MLC master control unit. Communication system that enables communication (PLC) communication using power lines and power lines, Figure 4 is a TLC (Telephone line carrier) using the page phone communication line through the MLC master control unit and PLC (Power line carrier) using the power line Communication system to enable communication, but to enable communication between different phases in three-phase power line communication.

2 is a system configuration diagram for TLC communication of a communication system of a nuclear power plant using multiplex line communication (MLC) of the present invention.

As shown in FIG. 2, a system for TLC communication of a communication system of a nuclear power plant using multiplex line communication (MLC) of the present invention includes a plurality of MLC modems 211a and 211b respectively connected to the page phone lines of the nuclear power plant. MLC slab modem unit 210 including 211c ..., an MLC master control unit 220 connected to each of the MLC modems 211a, 211b, 211c ... to enable MLC communication, and a communication signal to an external device. Ethernet switch 230 for transmission to the device.

The power supplied from the terminal block 260 matches the AC power supplied from the commercial power supply to the Ethernet switch 230 through the line filter 250 (basically, a pass filter composed of a coil and a condenser) to remove various noises. It is activated by receiving power from a switching mode power supply (240, SMPS) that is a modular power supply that converts the power supply.

The signal transmitted through the Ethernet switch 230 is orthogonal frequency division multiplex (OFDM) modulation and demodulation by the OFDM modem chip 225, OFDM modem chip 225 by the analog-front end chip (AFE) 224 The modulated demodulated signal is converted into an analog signal, and the analog signal converted by the impedance matching transformer 229 is transmitted to a telephone line. The hybrid transformer 221 transmits an OFDM modulated signal and a voice. The telephone signals are combined and transmitted to the respective MLC modems 211a of the slab MLC modem unit 210 to enable Ethernet communication of networking devices connected to page phones and MLC modems in a nuclear power plant using a telephone line.

3 is a system configuration diagram for PLC communication and TLC communication of a communication system of a nuclear power plant using multiplex line communication (MLC) of the present invention.

The communication system shown in FIG. 3 is a communication system in which a PLC modem 311 is configured for each phase in an outlet mounted at each location of a nuclear power plant to enable power line communication in the communication system shown in FIG.

As shown in FIG. 3, a system for TLC communication of a communication system of a nuclear power plant using multiplex line communication (MLC) of the present invention includes a PLC modem connected to each phase to an outlet mounted at each of the nuclear power plants. PLC slab modem unit 310 including 311, 312, 313, ..., and MLC slab modem unit 210 including a plurality of MLC modems 211a, 211b, 211c, ..., respectively, connected to the page phone line in a nuclear power plant. And an MLC master control unit 220 connected to each MLC modem 211a, 211b, 211c ... to enable MLC communication, and an Ethernet switch 230 for transmitting a communication signal to an external device. .

The power supplied from the terminal block 260 is a switching mode power that is a modular power supply that converts AC power supplied from commercial power through the line filter 250 to match the Ethernet switch 230 to remove noise. It is activated by receiving power from a supply 240 (SMPS, Switching Mode Power Supply).

The signal transmitted through the Ethernet switch 230 is orthogonal frequency division multiplex (OFDM) modulation and demodulation by the OFDM modem chip 225, OFDM modem chip 225 by the analog-front end chip (AFE) 224 The modulated demodulated signal is converted into an analog signal, and the analog signal converted by the impedance matching transformer 229 is transmitted to the page phone line and the power line.

The hybrid transformer 221 combines an OFDM modulated signal and a voice telephone signal and transmits them to each MLC modem 211a of the slab MLC modem unit 210 and uses page phone lines to page phone phones in a nuclear power plant. And Ethernet communication of networking equipment connected to the MLC modem 211 or communication signals to the respective PLC modems 311, 312, 313... Through the MLC modem 211a of each of the slab MLC modem units 210. This enables communication with the devices connected to the power lines at each of the nuclear power plants.

Here, the communication method through the PLC modem (311, 312, 313 ...) has a configuration capable of only the communication between the same phase in the three-phase power, the communication between the same phase in the PLC modem (311, 312, 313 ...) Each is made by PLC modems 311a, 311b, and 311c connected to each RST phase. Other power line communication system capable of communicating between different phases in three-phase power is described below with reference to FIG.

4 is a system configuration diagram for PLC communication, TLC communication and three-phase power line communication of a communication system of a nuclear power plant using multiplex line communication (MLC) of the present invention.

The communication system shown in FIG. 4 is a communication system in which a PLC module is added to the communication system shown in FIG. 3 to enable another inter-phase communication in three-phase power line communication.

As shown in FIG. 4, a system for TLC communication of a communication system of a nuclear power plant using multiplex line communication (MLC) of the present invention includes a PLC modem connected to each phase to an outlet mounted at each of the nuclear power plants. PLC slab modem unit 310 including 311, 312, 313, ..., and MLC slab modem unit 210 including a plurality of MLC modems 211a, 211b, 211c, ..., respectively, connected to the page phone line in a nuclear power plant. And an MLC master including a PLC module 410 connected to the MLC slab modem unit 210 and the PLC slab modem unit 310 and configured to enable inter-phase communication with the MLC module 220 for enabling MLC communication. And a control unit 400 and an Ethernet switch 230 for transmitting a communication signal to an external device.

The power supplied from the terminal block 260 uses a line filter 250 to remove noise, and converts the AC power supplied from the commercial power through the line filter 250 to match the Ethernet switch 230 It is activated by receiving power from a switching mode power supply (240, SMPS).

The MLC module 220 enables power line communication and page phone line communication between the slab PLC modem unit 310 and the slab MLC modem unit 210, and the signal transmitted through the Ethernet switch 230 is an OFDM modem chip 225. Orthogonal Frequency Division Multiplex (OFDM) modulation and demodulation are performed, and a signal modulated and demodulated by the OFDM modem chip 225 by an analog-front end chip (AFE) 224 is converted into an analog signal, and impedance matching is performed. The analog signal converted by the impedance matching transformer 229 is transmitted to the page phone line and the power line.

The hybrid transformer 221 combines an OFDM modulated signal and a voice telephone signal and transmits them to each MLC modem 211a of the slab MLC modem unit 210 and uses page phone lines to page phone phones in a nuclear power plant. And Ethernet communication of networking equipment connected to the MLC modem 211 or communication signals to the respective PLC modems 311, 312, 313... Through the MLC modem 211a of each of the slab MLC modem units 210. It is connected to the power line of each floor of the ship to enable Ethernet communication with the devices.

In addition, the Ethernet switch 230 is connected to the RJ45 (422) of the PLC module 410 is shared with the MLC module 220. This serves as a data sharing device for enabling communication between other phases of three-phase power.

PLC module 410 is a communication system in a nuclear power plant using a three-phase power line, and is connected to a switchboard receiving three-phase power, and serves as a three-phase power line communication device that enables three-phase power line communication, in particular, communication between other phases. . Here, three-phase power is a concept including three-phase three-wire or three-phase four-wire, and will be described below unified as three-phase power.

A three-phase earth leakage breaker that receives three-phase power from the switchgear is installed separately to perform power supply and cutoff independently of the main power line, and RST phase for each power line of each phase (R, S, T phase) The master PLC module 410 is connected to convert the power signal of each phase into a communication signal to communicate with the slab PLC modem 420 respectively connected to the outlet of each room, the Ethernet switch 230 is the master PLC module of each phase ( Receiving a communication signal from the 410 to act as a communication switch between each phase so that communication between the different phases (for example, communication between the RS, ST, TR phase) can be communicated without attenuation or distortion. The outlet and slab PLC modem 420 are described as being connected to a single phase (R phase or S phase or T phase) power source.

Each single-phase slab PLC modem 420 may be grouped into an R-phase slab PLC modem as Group1, an S-phase slab PLC modem as Group2, and a T-phase slab PLC modem as Group3, and each single-phase master PLC module 122 The R phase master PLC module is Group1, the S phase master PLC module is Group2, and the T phase master PLC module is grouped into Group3, and is configured to communicate between groups through the Ethernet switch 230.

First, a three-phase earth leakage breaker is supplied from the switchboard, and transmits a power signal for each of the R, S, and T phases to the R, S, and T phase master PLC modules 410, respectively.

R, S, T phase master PLC module 410 removes the noise of the signal and amplifies to the required size and transmit / receive unit 414, 419 and a signal to enable communication between the power line and the slave PLC modem 420 Analog-to-digital converter 417 to convert and a control unit 418 for controlling the overall operation. The control unit 418 is connected to the power supply coupler 412 through the zero crossing circuit 413 to allow the entire control by receiving power without a time offset of on and off.

The transmitted signal is transmitted to the MAC layer through the GPIO (General Purpose Input / Output Pin), which is the uppermost layer of the OSI layer, and the data passing through the MAC layer transmits the physical layer (PHY). Through the analog-to-digital converter 417, the digital signal is converted into an analog signal and the power line communication signal is applied to each phase of the power line by an orthogonal frequency division multiplex (OFDM) transmission scheme. In the reception, a signal applied to each phase of the power line is converted into an analog signal into a digital signal by the analog-to-digital converter 417. The converted digital signal is transferred to the GPIO (Application), which is the highest layer of the OSI layer, through the physical (PHY) layer and the MAC layer.

The signals passed through the transmission and reception process are respectively connected to the Ethernet ports of the Ethernet switch 230, and the Ethernet switch 230 enables the communication between the master PLC module 410 and the slab PLC modem 420 by group and at the same time. Enable communication between groups. Ethernet switch 230 is an interface to enable communication between groups (Group1, Group2, Group3), Ethernet matching unit for matching the Ethernet switch and subscriber interface, crossbar for switching control by port unit and data packet to be transmitted to the crossbar and It includes a control unit for notifying the switching control information to control the data packet is transmitted to the port corresponding to the path of the group.

The above-described communication system of the present invention enables page combination communication lines and power lines in a nuclear power plant, and three or more phase-communication lines using three-phase communication between other phases to enable one or two or more of them to be combined with each other. It is a technology that can cause a wave of industrial effects by solving the problem that the establishment of Ethernet communication was limited due to the specificity of nuclear power.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the above-described technical configuration of the present invention may be embodied by those skilled in the art to which the present invention pertains without changing its technical spirit or essential features of the present invention. It will be appreciated that the present invention may be practiced as. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

The present invention is an invention that can be widely used in the field of communication, particularly in the field of Ethernet communication using page phone communication in nuclear power plants and Ethernet communication using power line communication.

1 is a schematic diagram of a communication system of a nuclear power plant using multiplex line communication (MLC) according to the present invention.

2 is a system configuration diagram for TLC communication of a communication system of a nuclear power plant using multiplex line communication (MLC) of the present invention.

3 is a system configuration diagram for PLC communication and TLC communication of a communication system of a nuclear power plant using multiplex line communication (MLC) of the present invention.

4 is a system configuration diagram for PLC communication, TLC communication and three-phase power line communication of a communication system of a nuclear power plant using multiplex line communication (MLC) of the present invention.

Claims (8)

A multiplex line carrier (MLC) modem for transmitting a TCP / IP type data signal (page phone communication signal, telephone line carrier (TLC)) using a page phone line in a nuclear power plant; And an MLC master controller configured to receive communication with the page phone communication signal transmitted through the MLC modem and to communicate with communication equipment through an Ethernet switch. The MLC master control unit, An OFDM modem chip responsible for orthogonal frequency division multiplex (OFDM) modulation and demodulation; An analog-front end chip (AFE) for converting the demodulated signal through the OFDM modem chip into an analog signal; An impedance matching transformer for transmitting the analog signal to the page phone line; And a hybrid transformer for combining an OFDM modulated signal and a voice telephone signal. 10. A communication system of a nuclear power plant using multiplex line communication (MLC). delete A PLC (Power line carrier) modem connected to each outlet in the nuclear power plant and transmitting a data signal (power line signal) of TCP / IP type to power lines established between the same phases; MLC (Multiplex) transmits TCP / IP type data signal (page phone communication signal, TLC (Telephone line carrier)) using page phone line in nuclear power plant, and transmits the signal transmitted from PLC modem line carrier); And an MLC master controller configured to receive a power line signal or a page phone communication signal transmitted through the MLC modem to enable communication with a communication device through an Ethernet switch. The MLC master control unit, An OFDM modem chip responsible for orthogonal frequency division multiplex (OFDM) modulation and demodulation; An analog-front end chip (AFE) for converting the demodulated signal through the OFDM modem chip into an analog signal; An impedance matching transformer for transmitting the analog signal to the page phone line; And a hybrid transformer for combining an OFDM modulated signal and a voice telephone signal. 10. A communication system of a nuclear power plant using multiplex line communication (MLC). delete A PLC (Power line carrier) modem connected to each outlet in the nuclear power plant and transmitting a data signal (power line signal) of TCP / IP type to power lines established between the same phases; MLC (Multiplex) transmits TCP / IP type data signal (page phone communication signal, TLC (Telephone line carrier)) using page phone line in nuclear power plant, and transmits the signal transmitted from PLC modem line carrier); An MLC module for receiving a power line signal or a page phone communication signal transmitted through the MLC modem to enable communication with communication equipment via an Ethernet switch; R, S and T phase master PLC module for converting power signal into communication signal to enable power line communication for each phase from the switchboard in nuclear power plant and to communicate with slab PLC modem, and the R, S and T phase master PLC A PLC module which is a three-phase power line communication device sharing the Ethernet switch which receives a signal from the module and switches to enable inter-phase communication of the slab PLC modem using R, S, and T phase power, respectively. Communication system of nuclear power plant using line communication (MLC). The method of claim 5, The MLC module, An OFDM modem chip responsible for orthogonal frequency division multiplex (OFDM) modulation and demodulation; An analog-front end chip (AFE) for converting the demodulated signal through the OFDM modem chip into an analog signal; An impedance matching transformer for transmitting the analog signal to a page phone line or a power line; And a hybrid transformer for combining an OFDM modulated signal and a voice telephone signal. 10. A communication system of a nuclear power plant using multiplex line communication (MLC). The method of claim 5, The R phase master PLC module is grouped into Group1, the S phase master PLC module to Group2, and the T phase master PLC module to Group3, The R, S and T phase slab PLC modem may be added to each phase, the several R phase slab PLC modem is Group1, the several S phase slab PLC modem is Group2, the several T phase slab PLC Modems are grouped in Group3, The communication between the R, S, and T phase master PLC modules and the R, S, and T phase slab PLC modems is a direct communication between the R, S, and T phase master PLC modules and the R, S, and T phase slab PLC modems. The communication system of the nuclear power plant using multiplex line communication (MLC) is made, and the communication between the other groups through the Ethernet switch. The method of claim 5, Installed in the nuclear power plant configured to receive commercial power from the distribution panel for distributing power from the switchboard, and further R, S and T phase power outlets that are the medium for connecting the R, S and T phase slab PLC modem to the power line. Include, The R, S and T phase slab PLC modem is a plug-in type PLC modem of the type plugged into the R, S and T phase power outlets, communication system of a nuclear power plant using multiplex line communication (MLC).

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