DL-WJA Electric Power System microcomputer line protection assessment training platform

I. Overview

This device adopts a microcomputer line protection device widely used in modern power engineering, and is equipped with power supply, two-section transmission lines, mutual inductors, intelligent fault setting assessment and other modules. This device m*nly completes practical tr*ning in protection device characteristic testing, wiring, setting, operation, etc. It can be used for tr*ning in the electric power industry, and can also be used for the assessment of practical tr*ning of students in related majors in colleges and universities and technical technical schools.

1. Intelligent fault setting and large-screen LCD clicker:

2. Operating unit: operating unit circuit board (integrated with the display) and keyboard.

3. The operating unit adopts multiple protection design; dual power supply DC 12V input; 128X64LCD display; 8 switching alarm inputs, up to 48 relay control; the operating unit can be offline for assessment without being connected to the Internet; can automatically score; has alarm the display prompts.

It m*nly has the following operating functions:

Student Portal: Used by students when troubleshooting to check the rem*ning assessment time.

Teacher entrance: set faults, resolve all faults, set assessment time, change login password, and set device number. The teacher entrance requires a login password.

Score query: Query the current score of students.

Student ID query: Query the student ID set by the teacher through the computer.

Device number query: Query the local device address. Each operating unit has a unique device address.

Assessment time starts: used for the assessment to start counting down after the teacher has set the assessment time.

4. M*ntenance of electricians , electronic motors and vocational qualification tr*ning assessment simulation software

This software is in apk format and can be used on PC or mobile. This software can set faults manually or automatically. This software can manually set the fault point by selecting the green box in the circuit diagram (*** Up to 39 fault points can be set), or the system can automatically set one random fault point, two random fault points, three random fault points, four fault points randomly, and five fault points randomly. This software has functions such as toolbox, component library, magnifying glass, circuit diagram, etc. You can select a multimeter for testing through the toolbox, select appropriate components through the component library, and clearly understand each component and circuit through the magnifying glass. This software allows students to understand the working principle and circuit structure of the motor star-delta start control circuit through the setting of faults in the motor star-delta start control circuit and various investigations.

5. Virtual spectrum analyzer, logic analyzer, oscilloscope, and three-meter simulation software:

This software is in apk format and can be used on PC or mobile terminals. The functions of this software are: resistance measurement, AC voltage measurement (measuring transformer, if the multimeter burns out when measuring the transformer, black smoke will emit prompts and can reset the multimeter), determine the polarity of the transistor, measure the DC voltage (the light turns on when the ammeter is turned on), measure the DC current, and determine the quality of the capacitor. This software can drag the red and black pen tips at will. When the two pen tips are dragged and positioned on the object to be measured, a red circle will be displayed. If the positioning is not accurate, no red circle will be displayed, and when incorrect operations are performed (such as the wrong range selected, If the measured data is wrong, etc.), the meter pointer will be unresponsive, prompting errors and re-measurement, etc. This multimeter can select AC voltage range, DC voltage range, resistance range, current range, resistance adjustment to 0, and can enlarge the display data. Clearly view the measured data size. Students can learn the correct use of multimeters through this software.

2. Practical tr*ning and assessment items

1. Basic practical tr*ning items

(1) Simulation system normal, **, *** minimum operating mode

(2) Analog system short circuit

(3) Basic function test of microcomputer protection device

(4) Microcomputer time-limited current quick-break protection

(5) Microcomputer fixed time overcurrent protection

(6) Microcomputer with time-limited current quick-break protection

(7) Staged current protection

(8) The influence of operating mode on protection sensitivity and sensitivity verification

(9) Current and voltage ch*n protection

(10) Staged overcurrent protection and acceleration after automatic reclosing

(11) Other forms of line protection

Zero sequence current protection

Overload protection

Low voltage load shedding

(12) Secondary circuit wiring

(13) Secondary circuit debugging

(14) Protection calculation and setting

(15) Protective action test

2. Assessment items--design yourself according to the questions, draw up the steps yourself, and complete the assessment.

(1) Overcurrent protection

(2) Current and voltage interlocking quick-break protection

(3) Current and voltage ch*n quick-break, over-current comprehensive protection and automatic reclosing

(4) Overcurrent comprehensive protection and automatic reclosing

(5) Current and voltage ch*n protection and acceleration before automatic reclosing

(6) Secondary circuit troubleshooting