Mini Projects - Wireless µC based transmission line cut identifier

Wireless µC based transmission line cut identifier

Abstract:             

This circuit detects all the voltages and currents from their respective transformers. According to the received voltages and currents, power will be calculated. This method includes receiving data of the measured power consumed by a plurality of power customers, receiving delivered power data that includes data of the power delivered to the plurality of power customers, determining a difference between the receiving data and the maximum power data, determining that the receiving data is greater than a predetermined amount immediately an electrical device will be turned off. If the receiving data is lesser than the predetermined amount then it sends information to the substation that power is not there using the RF Communication.

Description:

In this project, the voltage from the voltage transformer and current from the current transformer is fed to ADC, which converts into digital form. Power is calculated from using voltages and currents coming from their respective transformers and this power is displayed using the LCD. If the delivered power exceeds the maximum power, the electrical appliance is turned off by means of a relay connected to the output pin of the micro controller.

If the delivered power is less than the maximum power, this indicates that the power is not there and is intimated to substation using RF.

The programming language used for developing the software to the microcontroller is Embedded/Assembly. The KEIL cross compiler is used to edit, compile and debug this program. Here in our application we are using AT89C51 microcontroller which is Flash Programmable IC.AT represents the Atmel Corporation represents CMOS technology is used for designing the IC. This IC is one of the versions of 8051.

HARDWARE COMPONENTS

·         Microcontroller

·         Power Supply

·         Crystal oscillator

·         Variable resistor

·         Voltage Transformer

·         Current Transformer

·         LCD

·         Relay

·         RLP-434

·         TLP-434

·         Max232

·         HT12D

·         HT12E

·         DB9 connector

·         ADC0808

SOFTWARE TOOLS

Embedded C

Keil

Assembly language.