Regulation Transformer with Extended Control Range

Abstract

The paper deals with research of the booster transformer (regulation transformer), which can be attributed to “Sen” family, which has an extended range and higher control accuracy. The main aim of the paper is to study both operational and energy characteristics of the transformer device that implements output voltage longitudinal-transverse regulation principle relative to the input based on power electronics. The most significant research results can be considered new developed circuit design and method for windings sectioning, including their regulating control strategy. The obtained computational experiments results based on developed structural simulation models of the booster transformer demonstrated effectiveness of the proposed device technical solution and its control strategy in terms of significant expansion of the output voltage range both in magnitude and in phase. It is shown that the proposed technical solution provides greater possibilities for phase voltage regulation (relative to the UPFC and “Sen” transformer) with the same restrictions on the longitudinal and transverse components of the boost voltage. Vector diagrams of the studded device were constructed and expressions characterizing its operating parameters were obtained. The characteristics of the device parameters variation in both idle and load mode were obtained and analyzed. The significance of the obtained results consisting in fact, that the proposed technical solution is capable to provide the same control actions in the form of an adjustable additional voltage as FACTS controllers such as UPFC and “Sen” - transformer, but on a simpler basis that is more accessible to practical implementation.

Keywords

• booster transformer
• active and reactive power
• rate power
• voltage regulation.