The Design and Implementation of Power Earth-Line

Monitoring System

The power earth-line monitoring system is a system that uses GSM communications

technology to collect record and display the physical parameters of earth lines when the power

lines are under construction and maintenance. The system is used to provide the help for

production management and on-site operator. The large construction of power lines often have

many measurement and control objects which are each separated by a certain distance but require

a unified management and scheduling. In particular widely distributed and adverse environment,

how to effectively collect and transmit data and then control and manage the whole procedure to

ensure construction safety has a very important significance.

Existing System:

Manual inspection of earth line is undergone in current system. Fault identification is

difficult and it requires more time for fault identification. Due to these disadvantages the

proposed system utilizes GSM based power earth line monitoring system.

Proposed System:

When the intelligent earth monitor detects that the single phase power lines and the single

phase earth-line are connected, it shows earth state. When the single phase power lines and

single phase earth-line are detected to be disconnected, it shows off state. Here, 89C51 transmits

state data to GSM data transmission module through the serial port, and then the GSM data

transmission module sends state data in the form of short messages by using GSM network. The

remote receiver receives state data via GSM data transmission module and then processes them

through MCU before they are sent into the monitor host in monitoring center via RS-232 port. In

the monitoring center, earth information is shown by the "Service monitoring program".

Block Diagram: Detecting Circuit:

Monitoring Section:

8051

Microcontroller ADC 0808

Power Supply

LCD Display

Max232

GSM Modem

L N E

Power Control

Circuit

Power Control

Circuit

Hardware requirements:

8051 Microcontroller.

ADC 0808.

Current Sensor.

LCD Display.

Max 232 circuit.

GSM Modem.

PC

Software requirements:

Embedded C

Keil Compiler.

VB

Advantages:

Fault detection and location is identified quickly.

Simple and easier technique to find earth fault.

PC Max232

Power supply

GSM

Modem

Low cost technique.