Application of Embedded Network Communication Front-end Machine in Digital Substation Automation System

1, application background

Substation integrated automation integrates and optimizes secondary equipment (including measurement, signal, relay protection, automatic devices, and remote control devices) of substations, using advanced computer technologies, modern electronic technologies, communications technologies, and signal processing. Technology to realize automatic monitoring, measurement, automatic control and protection of major substation equipment and transmission and distribution lines. It has four features: function integration, structure computerization, operation monitoring screen, and intelligent operation management.

The digital substation system architecture refers to IEC-61850 and can be divided into process level, secondary device control level, management level, and information management level. 4 Floor.

The production process layer is composed of the primary equipment of the substation and is the lowest layer of the system.

The secondary device control layer is composed of intelligent devices (IEDs) to implement control and protection functions for the respective objects (bus bars, feeders, main transformers, capacitors, etc.);

The communication management layer consists of a fieldbus connected to the IED and a main/standby front-end system as a universal gateway;

The communication management team collects the role of the production information uploaded in the station and delivers the control information of the management;

2, product application

The embedded IPC serves as the network communication front-end machine in the entire system. It is the communication hub of the system and is responsible for the collection of information in the station, the connection of the station-level computer, the connection of the remote control system, etc., and the front-end system in the communication management layer. It can simultaneously access a variety of bus equipments for power communication protocols, and is linked upwards to the information management network. It is an important node in the LAN and is responsible for collecting production information in the stations and uploading and issuing management control information. In the front-end system, Global Positioning System (GPS) timing signals and serial modems can also be connected to achieve remote control functions. In this case, the FEP system functions as a Remote Terminate Unit (RTU).

It focuses on solving the problem of power communication protocol conversion in the communication management layer and the integrated management of substation information in the information management layer. Its system function is mainly reflected in:

1) Realize the control intelligence and digitization of the bottom secondary equipment;

2) Realize the conventional telecontrol function of the substation;

3) Centralized management and monitoring of information in substations.

3, product features Description

Nematron's MAS-II series of embedded systems are products that support embedded technology, fanless design, and elastic expansion capabilities, and are ideal for high reliability and high stability required in industrial environments.

MS2000 is a dedicated communication front-end machine designed specifically for power systems. Its specifications are as follows:

· 1U 19" Standard Shelf Mounting · On-board Pentium M CPU, 1GB onboard memory · Fanless design · 5 × 10/100M Base_T network interface · 8 × RS-232C/422/485 serial port · 4 × DI +4 × DO
· 2 × USB2.0
·Windows CE.NET, Windows XP, Windows XP Embedded OS

MAS-II has abundant bus and network interfaces, which makes the state and control information of the different specifications of the secondary control equipment of the digital substations seamlessly connect to the substations of the substation after the corresponding protocol conversion. The high-speed and isolation functions of the communication ports Simplifies the design of the entire system, its embedded design concept and the fan-free feature of the system, greatly improves the reliability and security of the entire system, reduces the maintenance cost of the system, and the characteristics of multiple network ports make the system can follow the characteristics of dual networks. Designed to further improve the reliability of the system. The high level of integration of the MAS-II makes the entire digital substation automation system more cost-effective and the system's competitive advantages become more pronounced.

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