Simulation of the Main Electric Drive of the Plate Mill Rolling Stand

Abstract

This paper addresses the development of main electric drive simulation of 5000 plate mill rolling stand. The main purpose is to simulate back to back converters based on three level active front end rectifiers with space vector pulse wide modulation for the calculus of the basis direction transients in terms of the electromagnetic compatibility. The simplify close loop control of the active frond end rectifier was made based on the ideal synchronization with the alternation current mains, sequence symmetrical system of voltages and balance direct current voltage of the three level converter. The 18-pulse rectifier circuit is the important feature of the main electric. As load the equivalent current source was used instead of synchronous motor. The current magnitudes, which are used as the load, were experimental obtained on the real object by using of IBA program in the range of roughing and finish rolling. The modeling results were simulated at the Matlab/Simulink program. It can be allowed us to estimate the electromagnetic compatibility of the main electric drive based on the consumption primary and secondary current transients. The developed simulation model can be used to research the influence of three level active front end rectifiers with different types of space vector pulse wide modulation on the grid.