Saturday, 29 September 2012

Week 2 ( 20/8/2012 – 24/8/2012)


Research work

After the project ideas, the next stage to continue my final project by researching the operation of this project form input into output method. This project detects two condition in power distribution system problems which is overvoltage and high temperature condition. If both condition detected, it will produce a signal automatically to interpret the data using PIC microcontroller and then the signal go through the GSM modem for transmit the data using sms application. For the input, a sensor circuit designed to detects both condition and there are three types of sensor was most suitable can be used. Those sensors are voltage sensor, temperature sensor and current sensor. 

The voltage sensor and temperature sensor was the common sensor that I know and confidently to operate that device. For the current sensor, I will continue for my further work advancement project. For the output,  GSM (Global System Mobile)  and LCD ( Liquid Crystal Display)  will be used.



     Voltage sensor circuit                                         












  
Precision temperature sensor


This is my simple block diagram from the input to the output.


Week 1 ( 13/8/2012 – 17/8/2012)


Project ideas

In first week, my priority project ideas was the first thing that i should decided for my final year project 1 assessment. So, I searched many sources and information projects from other institute students especially engineering students. In electrical engineering, the core of this course was basically from power system subject which is generation, transmission and distribution systems. Each systems has its process for operation and each of engineering students should deeply understand. Distribution is the final stage in the delivery of electricity to end users.
 A distribution system's network carries electricity from the transmission system and delivers it to consumers. Typically, the network would include medium-voltage (less than 50 kV) power lines,substations and pole-mounted transformers, low-voltage (less than 1 kV) distribution wiring and sometimes meters. It begins as the primary circuit leaves the sub-station and ends as the secondary service enters the customer's meter socket. Distribution circuits serve many customers. The voltage used is appropriate for the shorter distance and varies from 2,300 to about 35,000 volts depending on utility standard practice, distance, and load to be served. Distribution circuits are fed from a transformer located in an electrical substation, where the voltage is reduced from the high values used for power transmission.    


Then, I made a decision to create one project related to power distribution systems. As I know, distribution system doesn’t have monitor system from step down transformer to end user either single phase or three phase. Monitoring system was very important to control the electricity and temperature because those factors can caused accidents. My project ideas known as “Power Distribution Monitoring System And Control Using GSM Modem”.
In this project, a sensor circuit is designed to log the data from the transformer and if it is found to be in over load condition, immediately the slave transformer will be connected in parallel to the master transformer and the load is shared. A GSM modem is connected to this system, and it sends message to the predefined mobile number about transformer switching data. The uniqueness of this project is, user also can switch the slave transformer through his mobile.

Advantages:
  • Automated Load Sharing by transformers
  • No manual errors
  • System can be monitored and controlled from any where
  • Mobile number can be changed at any time


Scopes for Advancements:
 This system is developed for mobile reporting application only. It also can be interfaced to computer system to record and process data base.

Applications:
Process Industries, Power Grids