Power Conversion Techniques Using Multi-Phase Transformer: Configurations, Applications, Issues and Recommendations

Abstract

Recently, the superiority of multi-phase systems in comparison to three-phase energy systems has been demonstrated with regards to power generation, transmission, distribution, and utilization in particular. Generally, two techniques, specifically semiconductor converter and special transformers (static and passive transformation) have been commonly employed for power generation by utilizing multi-phase systems from the available three-phase power system. The generation of multi-phase power at a fixed frequency by utilizing the static transformation method presents certain advantages compared to semiconductor converters such as reliability, cost-effectiveness, efficiency, and lower total harmonics distortion (THD). Multi-phase transformers are essential to evaluate the parameters of a multi-phase motor, as they require a multi-phase signal that is pure sine wave in nature. However, multi-phase transformers are not suitable for variable frequency applications. Moreover, they have shortcomings with regard to impedance mismatching, the unequal number of turns which lead to inaccurate results in per phase equivalent circuits, which results in an imbalance output in phase voltages and currents. Therefore, this paper aims to investigate multi-phase power transformation from a three-phase system and examine the different static multi-phase transformation techniques. In line with this matter, this study outlines various theories and configurations of transformers, including three-phase to five-, seven-, eleven-, and thirteen-phase transformers. Moreover, the review discusses impedance mismatching, voltage unbalance, and per phase equivalent circuit modeling and fault analysis in multi-phase systems. Moreover, various artificial intelligence-based optimization techniques such as particle swarm optimization (PSO) and the genetic algorithm (GA) are explored to address various existing issues. Finally, the review delivers effective future suggestions that would serve as valuable opportunities, guidelines, and directions for power engineers, industries, and decision-makers to further research on multi-phase transformer improvements towards sustainable operation and management.

Design and modelling of three‐to‐five phase three‐limbed transformer

“…These, make the 10-pulse using three-limbed three-to-five transformer advantageous over the conventional 6-pulse rectifier in applications such as traction rectifier. Further, the rectifiers using 3-to-m phase transformer are useful to enhance the quality the output DC voltage [37]. Improving the conventional transformer efficiency is a substantial aim of scientific research.…”

Fuzzy Logic and Genetic-Based Algorithm for a Servo Control System

“…Proposals have previously been presented, in which a hybrid controller with fuzzy logic and GAs was designed. They achieve the desired objectives in the systems and improve their performance against nonlinear behaviors [5,[28][29][30]. These techniques have also proven to be effective in counteracting disturbances and changes in the initial conditions of the process.…”

Simulation and experimental study of power flow in a seven‐phase transformer under fault conditions

“…Fault analysis of a multiphase transmission line is essential for the successful deployment of a multiphase transmission line protection system design [9]. The study of an unbalanced three-phase system and the effect of an unbalanced supply on the three-phase induction machines is expansively reported in the literature [10][11][12][13][14][15].…”

“…Apart from complexity, load mismatch is also seen. In the lower side n‐ phase system (excluding phase multiple of three) it was found that the seven‐phase system has the lowest mismatch of 2.3% [9].…”