Monitoring and data logging system for a generator


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  • what kind of protection circuits did you use??
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Monitoring and data logging system for a generator

  1. 1. PRESENTATIoPRESENTATIo NN Monitoring and Data Logging System For a Generator
  2. 2. 3 Contents  Introduction  Motivation  Objectives  Requirements  Block diagram  Speed control  Voltage control  Data logging
  3. 3. Motivation  The very first reason which motivated us toward this project is that we wanted some digital control (Microcontroller Based) for controlling different parameters of Synchronous Generator.  In the World of machinery, the control of the machine has moved almost completely from analogue electronic to digital. This happened to the case for the synchronous machine as well. Synchronous machines are used almost universally in power stations around the World as AC generators.  The objective of this project is to design and construct a closed loop speed control system for speed governor, voltage regulator and protection system for the three - phase synchronous machine.
  4. 4. Objectives 1. Automatic and manual mode of operation 2. Sensing the system parameters:  Current, Voltage  Temperature  Frequency  RPM (Revolution Per Minute) 3. Controlling the parameters  Frequency control for synchronous generator  Automatic voltage control 4. Protection system 5. Digital display using LCD 6. Serial port interfacing 7. Data logging 8. Uploading data on web page
  5. 5. Requirements  Circuit Designing of Frequency and voltage control modules.  Programming of 8051 microcontroller. Simulating the designed circuits on Proteus software.  Designing PCB for each module.  Making circuit hardware of modules.  Assembly of all parts on a single board.  Finalize checking of the working of all circuit modules.  Data Logging
  6. 6. Block Diagram
  7. 7. Speed Control
  8. 8. Voltage Control
  9. 9. Hardware  Microcontroller AT89C51  ADC 0808  Sine wave to square wave converter  DC motor (1H.P)  Synchronous generator (0.3 KW)  sensors 1.Current transformer 2.Voltage transformer 3.Rpm sensor 4.Temperature sensor LM 35 5. MAX232 6. IR sensor
  10. 10. Function of voltage control circuit:  8-channel ADC is connected 8051 to measure the analog parameter.  4069 is used to convert the sine wave to square wave. This square wave is applied to 8051 to measure the frequency of AC signal.  To monitor and display the generator parameters of synchronous generator on the LCD display.  To monitor the variations in the value of parameters of generator to determine whether these values exceed the limit given in the programming.  When any value of parameter exceed the predefined limit specific numbed is send to main control unit through serial port of microcontroller. This number is recognized in the main control unit to determine the type of fault.  A 20x2 LCD is used for displaying the different parameters.
  11. 11. Voltage monitoring circuit
  12. 12. Interfacing ADC with 8051 M/C
  13. 13. Current monitoring circuit
  14. 14. Temperature Monitoring circuit
  15. 15. Features of LM 335  Calibrated directly in ° Celsius (Centigrade)  Linear + 10.0 mV/°C scale factor  0.5°C accuracy guarantee able (at +25°C)  Rated for full −55° to +150°C range  Suitable for remote applications  Low cost due to wafer-level trimming  Operates from 4 to 30 volts  Less than 60 μA current drain  Low self-heating, 0.08°C in still air  No linearity only ±1⁄4°C typical  Low impedance output, 0.1 W for 1 mA load
  16. 16. Speed Monitoring IR proximity sensor This sensor can be used to measure the speed of object moving at a very high speed, like in industry or in tachometers
  17. 17.  The sender is composed of an IR LED (D2) in series with a 470 Ohm resistor, yielding a forward current of 7.5 mA.  The receiver part is more complicated, the 2 resistors R5 and R6 form a voltage divider which provides 2.5V at the anode of the IR LED 
  18. 18. MAX 232  MAX232 is an integrated circuit that converts signals from an RS-232 serial port to signals suitable for use in TTL compatible digital logic circuits. The MAX232 is a dual driver/receiver and typically converts the RX, TX, CTS and RTS signals.
  19. 19. PCB layouts
  20. 20. HYPER TERMINAL  HyperTerminal is a built-in windows program that can be used to connect to other computers, online services, and host computers and other devices using either modem or a serial DB-9 cable.  Band Rate = 2400 bits per Sec  Connection using COM1port
  21. 21. DATA LOGGING
  22. 22. Queries