This project provides solutions to the performance of a dry transformer at TPC Company. It mainly aims at monitoring and regulating temperature rise to safeguard the air cooled transformer. Therefore a smart protective automatic circuit will smartly tackle the overheating problem . The project is significant in many ways compare to the existing system such that; it displays the accurate temperature value of the transformer, It starts and stops fans automatically so as to regulate temperature rise and it alarms the attendant supervisor in case of failure. By doing this the transformers life span is expanded and therefore gives a benefit to the manufacturers.
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PROBLEM STATEMENT
The overheating of the dry transformer is a common problem at the factory where it requires much attention of the attendant worker to make sure not only the cooling fans of the transformer are always working properly but also temperature is regulated to a required range. When it happens that one of the cooling fans have failed or both, then its hard for one to notice until the worker attends or malfunction occurs.
PROJECT OBJECTIVES
To increase the life span of the dry transformer by making sure that it does not overheat.
LITERATURE REVIEW
The literature review covers the following points;
The block diagram of the existing system
DISADVANTAGES OF THE EXISTING SYSTEM
Creates disturbances to the attendant worker
Consumes production time
Not reliable
Leads to reduced life span of the transformer.
BLOCK DIAGRAM OF PROPOSED SYSTEM
ADVANTAGES OF THE PROPOSED SYSTEM
Reduces disturbance for the attendant worker
Ensures a long life span for the transformer.
Saves time during production.
It increases system stability.
It is reliable and less costly.
DATA COLLECTION
The following are data from the field of study
No. of dry transformer units = 1
Type of transformer = step down distribution transformer(11kV/433V)
Ambient temperature = 50C (+- 5)
Winding material = copper
Distance from the transformer to the workshop = 35meters
Dimensions of the workshop = [15×7]meters
No. of fans per 1 unit of transformer = 6
Type of fan used = radial type (cross flow)
Fan voltage rating = 220VAC 50Hz
Fan speed = 2500rpm
Power available = 220V and 415V
CIRCUIT DIAGRAM OF PROPOSED SYSTEM
CONCLUSION
This project aims to monitor temperature of a dry transformer at TPC limited and to also detect fan failures which resulted into overheating of the transformer. The project served its purpose as initially aimed. The main objective was achieved by first achieving the specific objectives .
RECOMMENDATION
In the course of designing this project, lots of new ideas and further research shows that many improvements on the smart cooling system of the transformer. Some of these recommendations could not be worked on due to time and cost constraints nonetheless they are given here as possible improvements to be considered later in the future.
Embedment of the temperature sensor into the transformer winding for better sensitivity.
Use of advanced air cooling units instead of fans.