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Power flow solutions of AC/DC micro-grid structures

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Details

Original languageEnglish
Title of host publication19th Power Systems Computation Conference, PSCC 2016
PublisherIEEE
ISBN (Print)978-1-4673-8151-2
DOIs
Publication statusPublished - 10 Aug 2016
Publication typeA4 Article in a conference publication
EventPower systems computation conference -
Duration: 1 Jan 2000 → …

Conference

ConferencePower systems computation conference
Period1/01/00 → …

Abstract

This paper presents a new and general frame-of-reference for the unified, power flow solution of AC and DC micro-grids using the Newton-Raphson method, where the quadratic convergence towards the solution is preserved. The cornerstone of this modeling development in power flow theory is the so-called multi-terminal VSC-HVDC system. In this frame-of-reference, an AC micro-grid of arbitrary configuration is connected to the high-voltage side of the LTC transformer of a VSC station. In turn, the DC side of each VSC is linked to a DC system of arbitrary configuration. Any number of AC micro-grids may exist and the DC system may contain single load or generation points such as a PV installation. Each VSC model takes into account, in aggregated form, the phase-shifting and scaling nature of the PWM control. It also accounts for the VSC current design limits, PWM limits within the linear range, switching losses and ohmic losses.

Keywords

  • Micro-grids, multi-terminal HVDC systems, Newton-Raphson method, power flows, VSC modeling

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