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access icon openaccess Benefit analysis of using multi-port and multi-function power electronic transformer connecting hybrid AC/DC power grids

  • Author(s): Yanhong Yang 1 ; Wei Pei 1, 2 ; Wei Deng 1, 2 ; Shizhong Zhang 1, 2
    • View affiliations
  • Source: Volume 2019, Issue 16, March 2019, p. 1076 – 1080
    DOI:  10.1049/joe.2018.8446 , Online ISSN 2051-3305
This is an open access article published by the IET under the Creative Commons Attribution -NonCommercial License (http://creativecommons.org/licenses/by-nc/3.0/)
Received 22/08/2018, Accepted 19/09/2018, Published 23/10/2018

This study proposes a generalised configuration of the multi-port and multi-function power electronic transformer (MPMF-PET) based mixed AC/DC power grids, and the equivalent circuit and mathematical model of the MPMF-PET are established. To illustrate the benefits of using MPMF-PET to improve the integration and power control ability of a distributed energy resource in an existing distribution network, an iterating evaluation algorithm is proposed for system power flow calculations. Case studies are carried out on a real distribution system modified with MPMF-PET. Results show that the performance of the hybrid AC/DC distribution system is increased by MPMF-PET through proper control and optimal operation, which realised the renewable energy in the AC system to power the DC system and increased the renewable energy acceptance.

Inspec keywords: power transformers; distribution networks; distributed power generation; AC-DC power convertors; power grids; load flow; power control; power electronics

Other keywords: hybrid AC/DC power grids; multiport; hybrid AC/DC distribution system; AC system; mixed AC/DC power grids; multifunction power electronic transformer; distributed energy resource; system power flow calculations; MPMF-PET; DC system

Subjects: Power convertors and power supplies to apparatus; Distribution networks; Control of electric power systems; Power system management, operation and economics; Optimisation techniques

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