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The Combined Source-Effect of Photovoltaic Generator and Bi-Directional DC-DC Battery Charger on Inverter Control Dynamics

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

Details

Original languageEnglish
Title of host publicationThe 7th International Conference on Renewable Power Generation
Place of PublicationCopenhagen, Denmark
Number of pages6
Publication statusAccepted/In press - 2018
Publication typeA4 Article in a conference publication

Abstract

This paper presents a method to solve the dynamic model of a grid-connected photovoltaic (PV) inverter with a battery energy storage. A three-phase grid-connected solar-battery system is studied using small-signal state-space modelling in the synchronously rotating dq-reference frame. The combined effect of a photovoltaic generator (PVG) and a bi-directional dc-dc battery charger (BC) on the inverter dynamic behaviour is analysed. It is shown that the characteristic right-half-plane pole in the PV inverter’s dc-link voltage control dynamics shifts to a lower frequency when the BC is connected, which improves the stability of the system and allows a lower bandwidth for the dc-link voltage control.

Keywords

  • Photovoltaic generator, battery charger, inverter, control, modeling

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