TY - JOUR
T1 - Comprehensive dynamic analysis of photovoltaic generator interfacing DC-DC boost power stage
AU - Viinamäki, J.
AU - Jokipii, J.
AU - Messo, T.
AU - Suntio, T.
AU - Sitbon, M.
AU - Kuperman, A.
N1 - Publisher Copyright:
© The Institution of Engineering and Technology 2015.
PY - 2015/5/1
Y1 - 2015/5/1
N2 - In transformer-less grid-connected renewable energy systems, interfacing of photovoltaic (PV) generators is typically implemented by means of DC-DC boost-power-stage converter, mainly because of its voltage-boosting capability. In order to track the maximum power point of a PV generator, input voltage of the converter is usually feedback controlled, forcing the converter to operate as a current-sourced rather than voltage-sourced converter. Nevertheless, PV generator interfacing power stage is commonly assumed to possess the same dynamic properties as corresponding voltage-sourced power stage. Investigations presented in this study reveal explicitly that the dynamics of PV generator interfacing DC-DC boost power stage resembles conventional buck power stage behaviour with duty-cycle independent resonance and additional right-halfplane zeros. In addition, the duty cycle has to be decreased for increasing the corresponding output variables (i.e. input voltage and output current). Extended experimental results are given to support the theoretical findings.
AB - In transformer-less grid-connected renewable energy systems, interfacing of photovoltaic (PV) generators is typically implemented by means of DC-DC boost-power-stage converter, mainly because of its voltage-boosting capability. In order to track the maximum power point of a PV generator, input voltage of the converter is usually feedback controlled, forcing the converter to operate as a current-sourced rather than voltage-sourced converter. Nevertheless, PV generator interfacing power stage is commonly assumed to possess the same dynamic properties as corresponding voltage-sourced power stage. Investigations presented in this study reveal explicitly that the dynamics of PV generator interfacing DC-DC boost power stage resembles conventional buck power stage behaviour with duty-cycle independent resonance and additional right-halfplane zeros. In addition, the duty cycle has to be decreased for increasing the corresponding output variables (i.e. input voltage and output current). Extended experimental results are given to support the theoretical findings.
UR - http://www.scopus.com/inward/record.url?scp=84927939900&partnerID=8YFLogxK
U2 - 10.1049/iet-rpg.2014.0149
DO - 10.1049/iet-rpg.2014.0149
M3 - Article
AN - SCOPUS:84927939900
SN - 1752-1416
VL - 9
SP - 306
EP - 314
JO - IET Renewable Power Generation
JF - IET Renewable Power Generation
IS - 4
ER -