Supervisory control and sliding mode control of a medium voltage direct AC-AC electronic voltage regulator

[摘要] ENGLISH ABSTRACT: As control problems become more and more complex, techniques are required that surpass the capabilities ofsimple controllers that are linearized about certain parametric set points. Controllers that can operate over alarge range of model parameter variations and even controllers that are largely model-independent are becomingmore valuable and necessary.In this control application, voltage regulation is done on a direct AC-AC medium voltage regulator, makinguse of a type of regulated autotransformer configuration. The fifth order system is shown to be prone to oscillationson the input bus. This, together with the control requirement of robustness to load variations, providesa challenging control problem that is rarely addressed in literature.This thesis solves the control problem by means of applying sliding mode control on voltage regulatormodule level, and supervisory control on system level.

[发布机构] Stellenbosch University