Research into the Z-Parameters and the Characteristic Parameters of a Ship's Alternating Voltage Regulator

The protection of the consumers against various emergency modes that may occur in ship's power systems needs to be fast, reliable and cost effective. Such protection can be realized in practice with the usage of autotransformer alternating regulators. The paper is related to a new type of analysis of an autotransformer discrete alternating voltage regulator, where the device is presented as a two-port. The main purpose of the present study is to determine the Z-parameters and the characteristic parameters of an autotransformer discrete alternating voltage regulator as a two-port with a load. A Matlab simulation model of the regulator with four levels of commutation realized with thyristor switches is used for the analysis. The non-linearities of the regulator's circuit have been considered in the model. The received simulation results were compared with experimental ones, which showed good adequacy of the model analysis. The obtained results could be used to improve methodologies for designing such devices, which would lead to improved energy efficiency of ship's electrical systems using autotransformer discrete alternating voltage regulators.