Open AccessCombined source‐effect of photovoltaic generator and bi‐directional dc–dc battery charger on inverter control dynamics
Author(s) -
Sallinen RoosaMaria,
Messo Tuomas
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.9332
Subject(s) - inverter , photovoltaic system , battery charger , electrical engineering , battery (electricity) , control theory (sociology) , voltage , maximum power point tracking , computer science , engineering , physics , power (physics) , control (management) , quantum mechanics , artificial intelligence
This study presents a method to solve the dynamic model of a grid‐connected photovoltaic (PV) inverter with 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 PV generator 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.