Three-Phase Custom Power Active Transformer for Power Flow Control Applications
Location: USA
Publication date: 2018-06-08
Published in: IEEE Transactions on Power Electronics, June 2018
ref. DOI: 10.1109/TPEL.2018.2845702

Local members

Joan Rocabert

PhD. Senior Researcher

Jose Ignacio Candela

PhD. Senior Researcher. Project Responsible

External members



This paper presents the three-phase custom power active transformer (CPAT), characterized by the integration of power electronics in a transformer to facilitate grid services. Such integration enables step-up/step-down transformation between primary and secondary as well as shunt and series compensation services to the power system through a single transformer. The CPAT can empower the grid with flexible ac transmission system and power quality services such as power flow control, reactive power compensation, active filter, and voltage regulation through a single monolithic transformer. In this paper, designs of the three-phase CPAT are realized and analyzed based on their equivalent magnetic circuit as well as their structure requirements and constraints. Simulation analysis of the three-phase CPAT clarifies its capability to actively regulate power flow between the primary and secondary windings as well as achieve grid harmonic current compensation. Moreover, through real-time simulations and an experimental prototype, the merits and performance of the three-phase CPAT were further validated.