Abhishek seminar
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2012-2013 ELECTRICAL ENGINEERING GOVERNMENT ENGINEERING COLLEGE ,AJMER ABHISHEK MATHUR VIII th semester Electrical Branch Dr. Lata Gidwani Assistant professor Guided By :- Presented By:- PROTECTION OF INDUCTION MOTOR USING PLC A SEMINAR PRESENTATION ON Seminar Coordinator Mr. K.G Sharma Associate professor
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AC Induction motor (IM) are used as actuators in many industrial processes. Although IMs are reliable, they are subjected to some undesirable stresses, causing faults resulting in failure. Monitoring of an IM is a fast emerging technology for the detection of initial faults. It avoids unexpected failure of an industrial process. Monitoring techniques can be classified as the conventional and the digital techniques. 1.1 PROTECTION SCHEME OF INDUCTION MOTOR Classical monitoring techniques for three-phase IMs are generally provided by some combination of mechanical and electrical monitoring equipment. Mechanical forms of motor sensing are also limited in ability to detect electrical faults, such as stator insulation failures. In addition, the mechanical parts of the equipment can cause problems in the course of operation and can reduce the life and efficiency of a system. It is well known that IM monitoring has been studied by many researchers and reviewed in a number of works. Reviews about various stator faults and their causes, and detection techniques, latest trends, and diagnosis methods supported by the artificial intelligence, the microprocessor, the computer and other techniques in monitoring unbalanced voltage inter turn faults, stator winding temperature and microcontroller based digital protectors have been recently studied subjects. In these, while one or two variables were considered together to protect the IMs, the variables of the motor were not considered altogether. Measurements of the voltages, currents, temperatures, and speed were achieved and transferred to the computer for final protection decision. A programmable integrated circuit (PIC) based protection system has been introduced using Microprocessors and the solutions of various faults of the phase currents, the phase voltages, the speed, and the winding temperatures of an IM occurring in operation have been achieved with the help of the microcontroller, but these electrical parameters have not been displayed on a screen. Nowadays, the most widely used area of programmable logic controller (PLC) is the control circuits of industrial automation systems. The PLC systems are equipped with special I/O units appropriate for direct usage in industrial automation systems. The input components, such as the pressure, the level, and the temperature sensors, can be directly connected to the input. The driver components of the control circuit such as contactors and solenoid valves can directly be connected to the output.
Transcript of Abhishek seminar
2012-2013ELECTRICAL ENGINEERING
GOVERNMENT ENGINEERING COLLEGE ,AJMER
ABHISHEK MATHURVIII th semester
Electrical Branch
Dr. Lata Gidwani
Assistant professor
Guided By :-
Presented By:-
PROTECTION OF INDUCTION MOTOR USING
PLC
A SEMINAR PRESENTATION ON
Seminar Coordinator
Mr. K.G Sharma
Associate professor
ABSTRACT In most modern industries there is a growing need for
high efficiency and availability in motor driver systems.
Moreover, motor operation monitoring is necessary for the implementation of proper and cost effective motor maintenance.
In this research, a PLC-based protection method for three-phase induction motors is used .
The PLC automated process costs less, provides higher accuracy. The PLC correlates and controls the operational parameters to the set point requested by the user and monitor the motor.
INDUCTION MOTOR PROTECTION
INTRODUCTION
o Main aim of this research based project is to design a motor driver system with the help of PLC to control induction motor and protect induction motor from possible faults .
o All operational data is provided by a device that is able to read line currents, line-to-line voltages, unbalanced current, unbalance voltage and temperature.
o This systems are equipped with special I/O units appropriate for direct usage in industrial automation systems
EXISTING SYSTEM Fault Detection and Protection of
Induction motor using PIC Controller in Sept 2006 .
The application of wireless sensor networks for condition monitoring in three-phase induction motors in 2007.
A Connectivity Improving Mechanism for ZigBee Wireless Sensor Networks.
FAULTS
OVERLOAD
UNDER VOLTAGE
OVER VOLTAGE
SINGLE PHASING
EARTH FAULTS
PHASE REVERSAL
PROTECTION SYSTEM HARDWARES
PROGRAMMABLE LOGIC CONTROLLER
POWER SUPPLY
RMS TO DC CONVERSION AD536 A
RS-232 CABLE
CURRENT/VOLTAGE TRANSFORMERS
COMPUTER SYSTEM
PROGRAMMABLE LOGIC CONTROLLER
A PLC is a small computer used for automation of real world processes, such as control of machinery on factory assembly lines.
It was originally developed to replace mechanical relay, timers, counters.
Its purpose to monitor crucial parameters & adjust process operation accordingly.
APPLICATIONS OF PLC
PLC COMPONENTS Sensors - converts a physical
condition into an electrical signal.
Discrete Input/output- referred to as a digital input/output, is an input/output that is either in an ON or OFF condition.
Analog Input/output:-An analog input/output is a continuous, variable signal.
CPU :- is a microprocessor system that contains the system memory & decision making unit.
PLC PROGRAMMING
Statement list Function block
Ladder diagram
The ladder diagram is the most popular programming language
CONNECTION OF PLC
POWER SUPPLY
A Constant Power Supply of 5V is required in the proposed system using rectifiers , filters and voltage regulator.
RMS TO DC CONVERSION(AD536A)
AD536A is a complete monolithic integrated circuit that performs true rms to dc conversion
RS-232 CABLE it is a serial communication physical
interface through which information transfers in or out one bit at a time.
it provides the connection between PLC and computer system.
CURRENT & VOLTAGE TRANSFORMER
A current transformer is a type of "instrument transformer" that is designed to provide a current in its secondary which is accurately proportional to the current flowing in its primary.
Voltage transformers (VT) or potential transformers (PT) are another type of instrument transformer, used for metering and protection in high-voltage circuits.
SOFTWARE INTERFACING
VIEW OF PROTECTION SYSTEM
SCADA MONITORING SCADA stands for SUPERVISORY
CONTROL AND DATA ACQUISITION
its systems are used to monitor and control a plant or equipment in industries graphically along with the control hardware .
VIEW OF SCADA SOFTWARE
APPLICATION OF SYSTEM
Textile IndustriesIndustrial Pumps & FansElevatorsCement millsRubber millsCranes
FUTURE SCOPE This paper presents a part of an ongoing
work.
In all growing industries ,there is need of motor driver systems to control and monitor of induction motor from one central point using PLC .
This motor driver system will identified the fault and protect the motor within a second
.
CONCLUSION
In this study, a novel digital protection system for three phase Induction motor designed and implemented successfully.
If any fault is observed during online operation of the motor, a warning message appears on computer and then the motor is stopped.
it provides a visual environment, which makes the system more user friendly than other protection system.
REFERENCES M. Peltola, “Slip of ac induction motors and how to minimize it” ABB Drives
Press Releases Technical Paper, ABB, New Berlin, 2003, pp. 1–7.
I. Colak, H.Celik, ˙I.Sefa “On line protection system for induction motors” Energy Convers. Manage.vol. 46, no. 17, pp. 2773–2786, 2005.
A. Siddique, G.S.Yadava, and B.Singh, “A review of stator fault monitoring techniques of induction motors” IEEE Trans. Energy Convers.vol. 20, no. 1, pp. 106114, Mar. 2005.
Y. Zhongming and W. Bin, “A review on induction motor online fault diagnosis” in 3rd Int. Power Electron. Motion Control Conf.(PIEMC 2000),vol. 3, pp. 1353–1358.
M. E. H. Benbouzid, “Bibliography on induction motors faults detection and diagnosis” IEEE Trans. Energy Convers.vol. 14, no. 4, pp. 1065–1074, Dec. 1999.
M.G. Ioannides, “Design and implementation of PLC-based monitoring control system for induction motor,” IEEE Trans. Energy Convers.vol. 19, no. 3, pp. 469–476, Sep. 2004.
QUERIES ????
