Combined source-effect of photovoltaic generator and bi-directional dc–dc battery charger on inverter control dynamics

The Journal of Engineering

  ^{1    1} 

[1] Laboratory of Electrical Energy Engineering, Tampere University, Tampere, Finland;

关键词: invertors;    DC-DC power convertors;    battery chargers;    power grids;    voltage control;    photovoltaic power systems;    PV generator;    bi-directional dc–dc battery charger;    inverter dynamic behaviour;    PV inverter;    combined source-effect;    photovoltaic generator;    inverter control dynamics;    dynamic model;    grid-connected photovoltaic inverter;    battery energy storage;    three-phase grid-connected solar-battery system;    small-signal state-space modelling;    dc-link voltage control dynamics;    synchronously rotating dq-reference frame;   

DOI  :  10.1049/joe.2018.9332

来源: publisher

【 摘 要 】

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.

【 授权许可】

CC BY