The Analysis and Control of Zero-Sequence Components in a Transformerless Back-To-Back (BTB) System Using Modular Multilevel Cascade Converters for Power Distribution Systems

Authors

  • Pracha Khamphakdi Ubon Ratchathani University

DOI:

https://doi.org/10.4186/ej.2017.21.6.81

Abstract

This paper provides an intensive discussion on analysis and simulation of a back-to-back (BTB) system based on double-star chopper cells (MMCCs-DSCCs). It is installed between two 6.6-kV power distribution feeders. It is also referred to as the so-called “loop power flow controller.” A three-phase 200-V, 10-kW, 50-Hz BTB transformerless system is simulated to verify its operating principles, modelling, and performance of zero-sequence current control using combination between a simple PI controller and a common-mode choke. The simulation results show that the zero-sequence current circulating between the two feeders can be suppressed as small as 10 mA (0.03%) in rms, which is within acceptable value and small enough to negligible.

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Author Biography

Pracha Khamphakdi

Department of Electrical and Electronic Engineering, Faculty of Engineering, Ubon Ratchathani University, Ubon Ratchathani 34190, Thailand

Published

Vol 21 No 6, Oct 31, 2017

How to Cite

[1]
P. Khamphakdi, “The Analysis and Control of Zero-Sequence Components in a Transformerless Back-To-Back (BTB) System Using Modular Multilevel Cascade Converters for Power Distribution Systems”, Eng. J., vol. 21, no. 6, pp. 81-89, Oct. 2017.