MODELLING AND SIMULATION OF INDUCTION FURNACE AND MITIGATION OF TRANSIENTS IN VARIABLE FREQUENCY DRIVE
Keywords:
Induction Furnace, power quality analyzer, mitigation, transients.Abstract
This paper proposes the various methods to mitigate transients caused due to switching of
Induction Furnaces working at 6.6KV, supplied by a double circuit 132KV feeder which also
feed loads at different locations. The frequent tripping of Adjustable Speed Drives at one
location led to the study of the reasons for tripping of drives and suggest methods to prevent the
same. In order to study the reasons for the voltage transients due to switching of major
loads,waveforms of voltages at various loads centres are observed using power quality
analyzer.The study is conducted by analyzing the behaviour of transients by switching individual
loads independently.During the study, it is observed that the distortion of the waveform was due
to the switching of capacitor banks of horizontal and vertical induction furnaces. After analyzing
the problem, remedial measures are being suggested for mitigating the transients on drives.
