CN102545963A - Electric power communication system utilizing SDH to remotely transmit Ethernet data - Google Patents

Abstract

The invention discloses a power communication system for long-distance transmission of Ethernet data by using SDH, and relates to the technical field of network communication systems. The present invention includes Ethernet, electric power SDH communication private network, substation end remote control host; Ethernet includes dispatching front-end processor and network switch located at the end of electric power dispatching center; Ethernet is connected with electric power SDH communication private network through the first converter; electric power The SDH communication private network is connected to the remote control host of the substation through the second converter. The invention uses digital interface converter equipment to replace a large number of protocol converters, cables and terminal server equipment at the master station end in the existing scheme, simplifies the topology structure of the machine room, and realizes the telecontrol from the pre-server at the master station end of scheduling automation to the substation end The transparent communication between hosts reduces the workload of subsequent maintenance and saves space in the computer room and wiring units.

Description

Power communication system for long-distance transmission of Ethernet data using SDH

technical field

The invention relates to the technical field of network communication systems, and is particularly suitable for power transformation systems.

Background technique

The existing power system has a single networking mode and can only provide point-to-point networking mode. Multiple back-to-back devices corresponding to the station end need to be placed at the central office for multiplexing and demultiplexing of signals. A large number of demultiplexing devices corresponding to the station end will be stacked, which will occupy a large number of resources such as wiring units and transmission cables in the central office equipment room, resulting in tight space in the equipment room, complicated wiring in the equipment room, and high line switching costs No less, while increasing a lot of potential failure points.

Contents of the invention

The technical problem to be solved by the present invention is to provide a power communication system that utilizes SDH (Synchronous Digital Hierarchy) to transmit Ethernet data over a long distance. The transparent communication between them provides another "soft 2M" communication method besides the network channel and PCM dedicated line channel; the system combines the stability of the 2M channel with the high speed and ease of use of the network channel, and simplifies the follow-up maintenance at the same time The operation and equipment nodes ensure reliable communication from the front-end server to the telecontrol host at the substation end. the

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an electric power communication system that utilizes SDH to transmit Ethernet data over long distances, including Ethernet, electric power SDH communication private network, and a telecontrol host at the substation end; The network includes a dispatching front-end processor and a network switch located at the end of the power dispatching center, that is, the master station; the Ethernet is connected to the power SDH communication private network through the first converter, and the first converter is connected to the network switch in the Ethernet respectively. Two-way connection with the electric power SDH communication private network; the electric power SDH communication private network is connected with the remote control host at the substation end through the second converter; the second converter is bidirectionally connected with the electric power SDH communication private network and the remote control host respectively.

The Ethernet also includes a switch with VLAN function.

The power SDH communication private network includes a central office optical terminal and a station optical terminal.

The communication between the first converter and the power SDH communication private network is carried out through optical fiber.

The communication between the power SDH private communication network and the second converter is carried out through a coaxial cable.

The second converter communicates with the remote control host of the substation through the RS232 port.

The technical progress obtained by adopting the above technical solution is: the present invention uses digital interface converter equipment to replace a large number of protocol converters, cables and terminal server equipment at the master station side in the existing scheme, simplifies the topology structure of the computer room, and realizes the dispatching automation master The transparent communication between the front server at the station end and the telecontrol host at the substation end reduces the follow-up maintenance workload and saves the space in the machine room and wiring units.

Description of drawings

Fig. 1 is a system composition block diagram of the present invention;

Fig. 2 is a structural composition diagram of an embodiment of the present invention.

Detailed ways

According to Fig. 1 and in conjunction with the embodiment shown in Fig. 2, it can be known that the electric power communication system that utilizes SDH to carry out long-distance transmission of Ethernet data includes Ethernet, electric power SDH communication private network, and remote control host at the substation end; the Ethernet includes The dispatching front-end processor and network switch located at the end of the power dispatching center, that is, the master station; the Ethernet is connected to the power SDH communication private network through the first converter, and the first converter is connected to the network switch and the power switch in the Ethernet respectively. The SDH communication private network is bidirectionally connected; the power SDH communication private network is connected to the telecontrol host at the substation end through a second converter; the second converter is bidirectionally connected to the power SDH communication private network and the telecontrol host respectively; the Ethernet It also includes a switch with a VLAN function; the power SDH communication private network includes a local end optical terminal and a station end optical terminal; the first converter and the electric power SDH communication private network communicate through optical fibers; the electric power SDH communication dedicated The communication between the network and the second converter is through the coaxial cable; the communication between the second converter and the remote control host of the substation is through the RS232 port. The Ethernet in this embodiment is composed of a dispatching front-end processor, a network switch and a switch with a VLAN function.

There are two dispatching front-end processors, and the two dispatching front-end processors are connected to two network switches—a network switch of network A and a network switch of network B, and the two network switches are respectively connected with two network channels of the power system. Two network switches are connected to three switches with VLAN function. The three switches with VLAN function are connected to the power SDH communication private network through the three first converters connected one by one. The model of the dispatching front-end processor is HP BL 870, the model of the network switch is H3C 5120, the first converter adopts the KE-3004C digital interface converter of Shijiazhuang Kelin Company, and the model of the switch with VLAN function is H3C 3600 ; The switch with VLAN function is connected to the first interface switch through a 1000Mbps electrical Ethernet cable; the first converter is connected to the optical terminal in the dispatching machine room in the power SDH communication network through optical fiber. The model of the optical transceiver in the communication room is YKMSTP155.

The optical transceiver in the communication room of the electric power SDH communication private network is connected with the telecontrol host computer of the substation through the second converter. The second converter adopts the KE-3004 E1 interface converter of Shijiazhuang Kelin Company, and the telecontrol host adopts the equipment of XJ Electric, the model is WYD-811. The optical transceiver in the communication room is connected to the second converter through the E1-75Ω coaxial cable, and the second converter communicates with the telecontrol host through the RS232 port. There are n units of the second converter and the telecontrol hosts of the substation respectively and they are connected correspondingly. The model of the optical transceiver in the communication room is YKMSTP155.

Working principle and signal transmission process of the present invention are:

The remote control host of the substation transmits the signal to the second converter, namely the KE-3004 E1 converter, through the RS232 port. The E1 interface of the KE-3004 E1 converter transmits the signal to the optical transceiver in the communication room in the power SDH communication network through the coaxial cable, and the E1 interface of the KE-3004 E1 converter is connected with the optical transceiver in the communication room one by one.

The signal is sent from the optical transceiver in the dispatching room after passing through the power SDH communication network. The optical transceiver in the dispatching machine room distributes the signal to three first converters, namely KE-3004C digital signal converters, through optical fibers. The STM1 port of the optical transceiver in the dispatching room communicates with the KE-3004C digital signal converter. The KE-3004C digital signal converter transmits the received signal to the switch with VLAN function through the 1000Mbps network cable, and the switch with VLAN function puts the signals of different network segments into different VLANs, and transmits them to the front-end A network switch and B of the dispatching automation system. network switch, and finally the network switch transmits the signal to the dispatching front-end processor. At this point, the signal transmission is completed.

In this embodiment, the power dispatching center is equipped with three KE-3004C digital signal converters (one of which is a cold standby), and the KE-3004C digital signal converter is connected to the H3C 5120 A network and B network of the computer room through the Ethernet interface At the same time, the KE-3004C digital signal converter is connected to the power SDH communication private network through the SDH 155M optical fiber interface, so that the dispatching front-end business can enter the power SDH communication private network. The substation end is equipped with a KE-3004 E1 converter, which is connected to the optical transceiver in the communication room of the power SDH communication network through an E1 cable, so that the telecontrol host is connected to the power SDH communication network. In this way, a transparent communication channel from the front-end server, that is, the dispatching front-end machine to the telecontrol host of the substation, can be established through the method of IP+port number, so as to realize the transparent transmission of data.

This system can be connected to as many as 126 substations, which can meet the construction plan of substations in Xingtai area in the next ten years.

Claims (6)

1. An electric power communication system utilizing SDH to carry out long-distance transmission of Ethernet data, characterized in that it comprises Ethernet, electric power SDH communication private network, and a telecontrol host at the substation end; The dispatching front-end processor and network switch at the station end; the Ethernet is connected to the power SDH communication private network through the first converter, and the first converter is bidirectionally connected to the network switch in the Ethernet and the power SDH communication private network respectively; The power SDH communication private network is connected to the remote control host at the substation end through the second converter; the second converter is bidirectionally connected to the power SDH communication private network and the remote control host respectively. 2. The electric power communication system utilizing SDH to carry out long-distance transmission of Ethernet data according to claim 1, characterized in that said Ethernet also includes a switch with a VLAN function. 3. The electric power communication system utilizing SDH for long-distance transmission of Ethernet data according to claim 1, characterized in that the electric power SDH communication private network includes a local end optical transceiver and a station end optical transceiver. 4. The electric power communication system for long-distance transmission of Ethernet data using SDH according to claim 1 or 3, characterized in that the communication between the first converter and the electric power SDH communication private network is carried out through optical fibers. 5. The power communication system for long-distance transmission of Ethernet data using SDH according to claim 1, characterized in that the communication between the power SDH communication private network and the second converter is carried out through a coaxial cable. 6. The power communication system for long-distance transmission of Ethernet data using SDH according to claim 1 or 5, characterized in that the second converter communicates with the remote control host of the substation through an RS232 port.

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