TY - GEN
T1 - Impedance-Based Sensitivity-Criterion for Grid-Connected Three-Phase Inverters
AU - Reinikka, Tommi
AU - Roinila, Tomi
AU - Luhtala, Roni
AU - Messo, Tuomas
N1 - jufoid=57394
PY - 2018/4/12
Y1 - 2018/4/12
N2 - Utilization of renewable energy sources such as solar and wind power requires affordable, reliable and efficient methods for grid connection. Most often, grid-parallel inverters are applied. As the number of inverter-connected resources in the power grid increases, they start to have a significant effect on the dynamics of the power system. The inverters have been shown to produce harmonic oscillations. To avoid producing or amplifying the harmonic content in the power grid currents and voltages, sensitivity of the inverter against external distortion should be analyzed. This paper provides a method for sensitivity analysis of the inverter. The sensitivity is analyzed by applying a forbidden region in the complex plane, which is based on the maximum-peak criterion that is often applied in the field of control engineering. The system is defined to have robust stability if the minor-loop gain formed by the inverter output impedance and the grid impedance stays out from the forbidden region.
AB - Utilization of renewable energy sources such as solar and wind power requires affordable, reliable and efficient methods for grid connection. Most often, grid-parallel inverters are applied. As the number of inverter-connected resources in the power grid increases, they start to have a significant effect on the dynamics of the power system. The inverters have been shown to produce harmonic oscillations. To avoid producing or amplifying the harmonic content in the power grid currents and voltages, sensitivity of the inverter against external distortion should be analyzed. This paper provides a method for sensitivity analysis of the inverter. The sensitivity is analyzed by applying a forbidden region in the complex plane, which is based on the maximum-peak criterion that is often applied in the field of control engineering. The system is defined to have robust stability if the minor-loop gain formed by the inverter output impedance and the grid impedance stays out from the forbidden region.
U2 - 10.1109/ECCE.2018.8557967
DO - 10.1109/ECCE.2018.8557967
M3 - Conference contribution
SP - 4173
EP - 4178
BT - The 10th Annual IEEE Energy Conversion Congress and Exposition (ECCE 2018)
PB - IEEE
T2 - IEEE Energy Conversion Congress and Exposition
Y2 - 23 September 2018 through 27 September 2018
ER -
