International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 04 | Apr -2017
p-ISSN: 2395-0072
www.irjet.net
GSM Based Remote monitoring of Variable Frequency Drives Rasin K R1, Arunkumar G2 1MTech in Power Electronics and Drives, VIT University, Vellore,Tamilnadu,India 2Professor, SELECT school, VIT university,Vellore,Tamilnadu, India
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Abstract - For manufacturers, cost of commissioning and
induction motors speed with energy savings,comparing to traditional mechanical systems variable speed drives are more reliable, beyond this optimal speed control,powerfactor improvement, soft starting and extended machine life are the benefits of variable frequency Drives. In industrial atmosphere it is necessary to monitor the operation of variable frequency drives for ensuring better performance, but in most applications the Drive is installed in hazardous areas or out of work reach areas which will prevents the engineers from continuous monitoring of the drive performance. Recently some Bluetooth based applications are available with VFDs to monitoring the drives without entering to restricted areas. Which will helps engineers to troubleshooting and improve drive performance. Which will make Drive engineers work more ease and save time. But Bluetooth has many limitations in case of transfer speed, distance of communication, connectivity issue etc. GSM based remote monitoring is proposed, which will works along with Modbus communication protocol and serial port communication. Which will provide a very efficient monitoring of VFD’s performance which is connected in remote site.This technology will fast fetching of drive data and will store in cloud server. Which can be monitored through a remote monitoring portal.
maintaining the Drive performance growing increasingly is more important. In industrial application most of this Drives are connected in hazardous region or in distant non reachable work sites. Service engineer needs to be monitor the performance of drives in this locations will be impossible, so analyzing the performance and taking correct decisions in this cases will be difficult .The service engineers and installers will focus on new technologies which make it convenient for customers take correct decisions without overwhelming them with unnecessary complexity. This paper intended to propose a low cost remote monitoring system technology for variable frequency drives which is connected in hazardous areas or non reachable remote sites using a GSM modem and cloud server which will speed and ease the work of engineers commissioning drives at an industry where they won’t needs to enter difficult-to-reach work or hazardous areas to analyze the drive operation. To verify the operation, results and observations from monitoring portal is cross checked. Key Words: GSM Modem, Remote monitoring, Modbus RTU, Parameter configuration, cloud storing, monitoring portal, Drive performance
1. INTRODUCTION
1.1 System Architecture and Communication Protocol
The first A.C. drive was commissioned by F.E. Alexanderson of General Electric in the Logan Power Station of Pacific Gas and Electric Company in 1932.Which was based on a thyratron cycloconverter fed wound rotor induction motor drive. From then industrial drives technology grown rapidly. As a result of strong effort of scientists and engineers leaded to development of highly advanced technology named Variable Frequency Drive. Variable frequency drive is a power electronics principled device which provides variable frequency, variable output voltage used to control speed of induction motor from constant voltage sine wave power and a constant frequency, It varies the speeds of a three phase induction motor by controlling the frequency and voltage of the input supply of induction motor. Variable frequency drives has unavoidable importance in industrial applications, primary function of variable frequency Drive is to provide smooth control of
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Fig-1 shows the Block diagram of remote monitoring of Variable frequency drives using a GSM modem. A 3g based GSM modem is the heart of proposed remote monitoring system. The Variable frequency Drive connected at remote customer site or hazardous region is connected with GSM modem. Using either an embedded fieldbus interface or a fieldbus adapter,VFD can be connected through a communication channel to an external control system. The embedded fieldbus interface will supports protocol called Modbus RTU.Modbus RTU is serial (RS-232 or RS-485) and open protocol derived from the Master/Slave architecture concept.
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