• Transformer is the key equipment in power system.

• Its safe and stable operation is important.• "Monitoring" is here defined as on-line

collection of data. • Includes sensor development, measurement

techniques for on-line applications.• It is very difficult and expensive to construct

the communication wires to monitor and control.

• ZigBee is used for communicating the monitored parameters.

INTRODUCTION

• The failures of transformers in service are broadly .

• Over Load condition temperature rise, low oil levels and improper installation and maintenance.

• Factors temperature rise, low oil levels and over load, need continuous monitoring to save transformer life.

• Wireless monitoring critical information such as oil temperature, and oil level of transformer.

• Data are collected Real time and continuously.

• Monitoring the transformers problems and solve this before they occur.

• Prevent faults that are costly to fix and result in a loss of service life.

•Most power companies use Supervisory Control and Data Acquisition (SCADA) .

•SCADA system for online monitoring of distribution transformers is an expensive proposition.

•Distribution transformers are currently monitored manually .

•Person periodically visits a transformer site for maintenance and records parameter of importance.

BACKGROUND AND LITERATURE SURVEY

•This type of monitoring cannot provide information about occasional overloads and overheating of transformer oil and windings.

•All these factors can significantly reduce transformer life.

• The proposed methodology is based on Robust technology

• Meets safety reliability and fastest in operation.

• It consists of a sensing system, signal conditioning electronic circuit, controller.

• It is installed at the transformer site and the finding parameters using the embedded system.

• The acquired parameters are processed and recorded in the system memory.

• System will help the system to run under reliable condition and identify problems before any failure.

PROPOSED TECHNOLOGY

•Transformer SectionBLOCK DIAGRAM

•Receiving and Monitoring Section

•TRANSFORMER SIDE•Power Supply Section•Zigbee Wireless transmitter receiver•Load detection sensor•Oil Level detector•Temperature sensor•Load Trip Control•Cooling system control

HARDWARE DESCRIPTION

•MONITORING AND CONTROL SECTION

•Power Supply Section•Zigbee Wireless transmitter receiver•Monitoring and control Computer

•Zigbee is a low power spin off of WiFi. It is a specification for small, low power radios based on IEEE 802.15.4 – 2003 Wireless Personal Area Networks standard.

Zigbee

• 802.15.4 Protocol created by the IEEE foundation.

• Data rate of 250KBps (Kilobits per second).• Can be used indoors and outdoors.• Range is from 100ft-300 for standard XBee

modules and 300ft-60 Mile for XBee Pro Modules.

• The standard XBee has a 1mW transmit power and the XBee Pro has a 60mW transmit power.

• No configuration is required out of the box.• Default baud rate is 9600bps.

Features of Zigbee

• Devices can be operated from anywhere in the world.

• Efficient and low cost design.• Low power consumption.• Real time monitoring.• The system is very simple.• Easy to operate.• Data is more secure.• Saves manual labor by automatically

uploading and logging in any given personal computer.

ADVANTAGES

•This system can be implemented in industries.

•This System can be installed in rural and urban areas.

•This system can be used to monitoring and controlling the home appliances.

APPLICATIONS

•We can apply this technology to monitor Power consumption in each transformer or distribution sides.

•We can develop the system to detect power theft and monitoring section.

FUTURE SCOPE

•Possible to monitor a large number of parameters of distributed transformer at a relatively Low cost.

•The challenge is to balance the functions of the monitoring system and its cost and reliability.

•WDTMS is able to record and send abnormal parameters of a transformer to concerned office.

•It works on Wireless technology.

CONCLUSION

• C.E.Lin, M.Ling, and C.L.Huang (1993). “An expert system for transformer fault diagnosis using dissolved gas analysis”. IEEE Transactions on Power DeliveryYo1 8, No 1 January 1993

• Liebfried, T., "Online Monitors Keep Transformers in Service", IEEE Computer Applications in Power, July 1998. p.36-42.

• IEEE PC57.143 TM/D20, "Draft Guide for Application of Monitoring Liquid Immersed Transformers and their Components", March 2008.

• Sokolov, V., Roizman, O., ’’Moisture Management in Power Transformers“, CIGRE Transformer Committee A2 WG12-30, WG Presentation, 2006.

REFERENCES