A study of fault ride through control using symmetrical coordinate calculation

This paper proposes a real time symmetrical coordinate transformation applied for the fault-ride-through when the imbalanced fault occurs in the utility power system. The power conditioner of the photovoltaic system in Japan is required to remain connected when the utility power system fault occurs under certain condition. The most popular fault is 1 line-to-ground fault. The next is 2 line-short-circuit fault. Both cause the imbalance voltages and currents in 3-phase power system. This paper presents the novel fault-ride-through control using the real time symmetrical coordinate transform from the memorized 3-phase voltage data. Simulation results show the effectiveness of the proposed method when the dc side voltage is constant and the 1 Line-to-Ground fault. Simulation results also certify that the proper change of the controller of the dc-dc converter from the MPPT control to the constant dc voltage control can perform the good FRT operation.

[1]  Noriyuki Kimura,et al.  Real time symmetrical coordinate transformation applied for detection of imbalanced fault in utility power system , 2014, 2014 16th International Power Electronics and Motion Control Conference and Exposition.

[2]  F.A. Magueed,et al.  Transient performance of voltage source converter under unbalanced voltage dips , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[3]  Noriyuki Kimura,et al.  New real time symmetrical coordinate transformation using complex number calculation to detect imbalanced fault in utility power system , 2014, 2014 IEEE 15th Workshop on Control and Modeling for Power Electronics (COMPEL).

[4]  Sergio Busquets-Monge,et al.  Control Strategies Based on Symmetrical Components for Grid-Connected Converters Under Voltage Dips , 2009, IEEE Transactions on Industrial Electronics.