Distributed process control system training device

Distributed process control system tr--ning device,Power system microcomputer line protection experiment desk

I. Overview

The tr--ning device consists of two parts of the hardware and software. Among them, the hardware includes the unit, the smart instrument, and the DCS control unit; Composition of engineering mathematics software.

Signal interface panel: The instrument signal and electrical signal in the control object are transferred to the signal wiring board, which provides sensor detection and actuator control signal interfaces such as AI, AO, DO, etc., facilitating the connection to form a different control system. Different wiring between the experimental board and the signal board is performed through a secure -type plug -in wire to complete various experiments in the process.

The system network is divided into three levels: monitoring network, system network and control network. The monitoring network layer realizes the interconnection of engineer stations, operator stations, advanced computing stations and system servers. Control the network layer to realize the communication stations and process communication.

Second, configuration and function

(1) The overall structure of the system

1. The system network architecture is composed of the management network (MNET), system network (SNET), and control network (CNET). Management network is an optional network layer, which is used to communicate with factory -level production management systems such as MES and third -party management software. It can also implement security information publishing through the Internet to achieve advanced management and sharing of data.

2. System network connection engineer stations, operator stations, historical stations and control stations and other system nodes, support P-TO-P (peer network), C/S (client/server), P-TO-P and C /S (mixed) three network structures can quickly build a high -speed redundant network of star, ring or bus -type topology, complies with IEEE802.3 and IEEE802.3U standards, and 100/1000Mbps adapt.

3. The controller used by the control network for the control station is connected to each I/O module and smart devices. It supports the star and bus structure, which is in line with IEC61158 (national standard: JB/T10308.3-2001, European standard: EN50170) , Ensure the real -time, stability, and fast of on -site communication.

4. The system network supports 20 users on real -time monitoring of target objects.

5. Engineer Station

1) It is m--nly used for system management and configuration m--ntenance and modification. With offline configuration test function; online download function; screen configuration and editing; functional point configuration and definition function; control loop configuration function; alarm, trend chart and other definition and editing functions; communication definition and configuration functions; device definitions And configuration function; database definition and configuration function; reporting functional function, etc.

2) The engineer station has a network capacity and adopts a dual -network card configuration. It can be connected to the entire plant management network through the switch. The engineer station can be used as an operating station.

Distributed process control system tr--ning device,Power system microcomputer line protection experiment desk

This device is based on the teaching requirements of courses such as "Power System Relay Relay Protection", "Electricity Engineering", "Electricity Automation", "Microcomputer Protection of Electric Power System", and combined with the actual application and development of the microcomputer line protection experimental device. Through this experiment, students can be familiar with and master the principles of conventional electromagnetic relay protection and microcomputer protection in the power system to protect the wiring and setting test methods. The installation design is compact, integrated, and the function of the protection device is complete. It integrates multiple functions of protection, measurement, control, monitoring, and communication. This device can not only be used as a teaching experimental platform for protection of professional line protection of electricity, electrical, and automation, but also also Can be familiar with and master the hardware and software platforms that master the power communication regulations and multiple programming software. This device is also equipped with RS-485/MODBUS-RTU communication interface and upper machine monitoring software.

1. The safety protection system of the device

After the three -phase and four -line power supply is input, the output (floating ground design) is used (floating ground design). The total power supply is controlled by the three -phase key switch, and a three -phase lamp fuse is provided as the instructions and protection of the phase.

The control screen power supply is controlled by the contactor through the start and stop button.

The screen is equipped with a voltage leakage protection device and a set of current leakage leakage protection device. If there is a leakage in the inside, outside or strong electricity output of the screen, the alarm and cut off the total power supply to ensure the safety of the experiment.

Three -phase tone pressure device original and sub -edge have overcurrent protection technologies, which can be automatically protected by phase and lines of over -current or direct short circuit.

There is a timer and alarm recorder (service manager) to record the number of times of illegal use, and provide a unified standard for the assessment of students' experimental skills.

2. Experimental project

System experiment

The simulation system is normal, maximum, and minimum operation experiment

Simulation system short circuit experiment

Protective device static test

Basic function test of microcomputer protection device

Microcarmark time limit over current protection

Microcarmarking current speed break protection

Microcarmark Time -limited current speed break protection

Phase current protection

The effect of running method on protection sensitivity and sensitivity verification