Calculation of theoretical line losses in PV stations containing distributed PV based on the modified equivalent resistance method

The large-scale access of distributed PV changes the structure and tidal distribution of the traditional distribution network, which makes it difficult to adapt the traditional theoretical line loss calculation method to the new power system. Firstly, the distributed PV power model is established, secondly, the three-phase imbalance in low-voltage station area is considered and the correction amount of three-phase imbalance is added, and finally, based on the traditional equal resistance method, a modified equal resistance method considering the three-phase imbalance in low-voltage station area with distributed PV is proposed. By calculating the theoretical line loss of an actual station area containing distributed PV, the modified iso-resistance method is compared with the traditional iso-resistance method and the forward back generation method to prove the accuracy of the modified iso-resistance method.