Comparative Analysis of Phasor-Phasor and Detailed-Phasor Models of Regulating Transformer

Abstract

AbstractThe research paper presents the comparative analysis of MATLAB model of a regulating transformer (RT). Two MATLAB models are built for analysis. Each model contains two type of blocks of regulating transformer. One block is phasor type, and the other is detailed type Simulink block. Difference between both types of blocks used and integrated in both models are explained in the research paper. On-load tap changers are used for voltage regulation by altering the turn ratio of the transformer after connecting a tapped winding on each phase. In first model, model 1 is detailed type integrated with model 2 which is phasor type. In second model, both model 1 and model 2 are phasor type. Both models are connected in parallel with each other through a distribution network rated 25 kV. Therefore, Simulink models are developed two times with different types of regulating transformer blocks. The results are obtained after simulation of both Simulink MATLAB models, and four traces of tap positions, superposition of voltage, active power, and reactive power are observed to analyze the impact of voltage regulation because of the tap change regulating transformer. The research paper also focuses on observing and comparing the speed of simulation when we switch from first model to second model of distribution network connected with regulating transformers.KeywordsRegulating transformer (RT)On-load tap changers (OLTC)Phasor type modelDetailed type modelDistribution networkVoltage regulationMATLAB Simulink