Abstract
M.Ing. (Electrical and Electronic Engineering)
The purpose of this investigation is mainly the study of various topologies of force commutated distortion compensators. This is done against the background of distortion in power systems in general. At the time of the investigation confusion reigned the domein of terminology and definition of power components and power compensators. Part of the investigation was the functional categorizing of power compensators. Forced commutated distortion compensators were then highlighted as element of this suggested frame work. There is a general increase of distortion in power networks which emphasises the limits of passive filters to compensate for non-active power. The use of power converters as forced commutated distortion compensators proves an effective means whereby to counteract these limits.
In this document the different topologies of forced commutated distortion compensators are labelled according to the position where the converter is coupled to
the network, as well as the characteristics of the energy storage element used. The
topologies are studied through modelling, mathematical analysis and simulation.
An experimental system of one of the topologies is presented. Control strategies for forced commutated distortion compensators are discussed with emphasis on the control of energy loss in the energy storage elements of the compensators.
The investigation is concluded with proposed ideas for futher study as well as a
philosophical approach to the role of forced commutated distortion compensators in the future.