ZIGBEE BASED FAULT MONITORING AND IDENTIFICATION SYSTEM

Published Thursday 6 October 2011 by gk in  


ZIGBEE BASED FAULT MONITORING AND IDENTIFICATION SYSTEM
Abstract:
         Industry of street lighting systems are growing rapidly and going to complex with rapid growth of industry and cities. To control and maintain complex street lighting system more economically, various street light control systems are developed. Nevertheless most of developed systems have some drawbacks. So we are going to develop new light control system which can overcome old systems drawbacks. We surveyed various street light control systems and analyzed its characteristics. Through these efforts, we found that common drawbacks of most light control systems are uneasiness of handling and difficulty of maintenance. To reduce uneasiness of handling and difficulty of maintenance in operating light control system, we designed new street light control system by using Zigbee communication technique. In this thesis, we describe on the H/W design of new street light control system designed by using Zigbee communication protocol.
We developed a prototype street light control system. Developed control system is composed of 3 different units, centralized control system, remote concentrator and remote street light control terminal. Among them, remote concentrator and remote street light control terminal are H/W based system and developed with same specification we described in section 2. Centralized control system is developed for windows 2000 based server system and most of developing works was S/W oriented.
Zigbee is rising communication protocol that can be used for wide range of application. Although it do not have  broadband characteristics, its low price and adequate communication characteristics, for example low power consumption, makes it good candidate for communication protocol. Followings are some list of main characteristics. Data rate : 250 kbps(2.4 GHz),Power consumption : 60mW,Distance : up to 100m According to our survey on street light control system, data rate of maximum 10kbps is sufficient. Zigbee’s relatively low data transfer capacity is not make any handicap and we can reduce data rate to improve reliability of data transfer. Short communication distance also does not make any problem. Span between light poles are within 100m, and this is sufficient for communication because we can transfer data to more long distance by reducing data rates. In this we have done additional applications the lights are going to ON/OFF depend on the density of the light by using Light Density Sensors, and also to give the alert to the EB stations if in case of any power failures and other identification to the centralized stations.
Remote Street Light Control Terminal:
            In this unit is used to control the single street light. We use current transformer and potential transformer for measuring current and voltage of the individual lamp. By using the two parameters we can detect which type of fault occurred in the terminal unit. If the voltage value is equal to zero, then there is possible situation for line fault. If the current value is equal to zero, then the load have problem
Remote Concentrator:
This unit has ability to monitor and control the street lights in more than one area. The unit also sends information to Remote centralized control system about which area lights are working and not working through GSM modem.
Remote centralized control system:
            This unit major function is   monitoring more number of Remote Concentrator. It also used to turn on the street lights regularly.

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