TY - JOUR
T1 - Wide-scale adoption of photovoltaic energy
T2 - Grid code modifications are explored in the distribution grid
AU - Yang, Yongheng
AU - Enjeti, Prasad
AU - Blaabjerg, Frede
AU - Wang, Huai
N1 - Publisher Copyright:
© 1975-2012 IEEE.
PY - 2015/9/1
Y1 - 2015/9/1
N2 - Current grid standards largely require that low-power (e.g., several kilowatts) single-phase photovoltaic (PV) systems operate at unity power factor (PF) with maximum power point tracking (MPPT), and disconnect from the grid under grid faults by means of islanding detection. However, in the case of wide-scale penetration of single-phase PV systems in the distributed grid, disconnection under grid faults can contribute to 1) voltage flickers, 2) power outages, and 3) system instability. This article explores grid code modifications for a wide-scale adoption of PV systems in the distribution grid. In addition, based on the fact that Italy and Japan have recently undertaken a major review of standards for PV power conversion systems connected to low-voltage networks, the importance of low voltage ride-through (LVRT) for single-phase PV power systems under grid faults is considered, along with three reactive power injection strategies. Simulations are presented for a PV power system with a LVRT capability and ancillary services. An example of a full-bridge single-phase grid connected system is tested experimentally to demonstrate the potential benefits. Additionally, grid codes for advanced PV systems with the discussed features are summarized.
AB - Current grid standards largely require that low-power (e.g., several kilowatts) single-phase photovoltaic (PV) systems operate at unity power factor (PF) with maximum power point tracking (MPPT), and disconnect from the grid under grid faults by means of islanding detection. However, in the case of wide-scale penetration of single-phase PV systems in the distributed grid, disconnection under grid faults can contribute to 1) voltage flickers, 2) power outages, and 3) system instability. This article explores grid code modifications for a wide-scale adoption of PV systems in the distribution grid. In addition, based on the fact that Italy and Japan have recently undertaken a major review of standards for PV power conversion systems connected to low-voltage networks, the importance of low voltage ride-through (LVRT) for single-phase PV power systems under grid faults is considered, along with three reactive power injection strategies. Simulations are presented for a PV power system with a LVRT capability and ancillary services. An example of a full-bridge single-phase grid connected system is tested experimentally to demonstrate the potential benefits. Additionally, grid codes for advanced PV systems with the discussed features are summarized.
UR - http://www.scopus.com/inward/record.url?scp=85027952154&partnerID=8YFLogxK
U2 - 10.1109/MIAS.2014.2345837
DO - 10.1109/MIAS.2014.2345837
M3 - Article
AN - SCOPUS:85027952154
SN - 1077-2618
VL - 21
SP - 21
EP - 31
JO - IEEE Industry Applications Magazine
JF - IEEE Industry Applications Magazine
IS - 5
M1 - 7137649
ER -
