Research on Calculation Method of Line Loss in Distributed Transformer Area Considering Uncertainty of Distributed Photovoltaic Output

摘要

Distributed PV output is affected by actual factors such as season and weather, and its output has certain volatility. How to quantitatively analyze the impact of distributed PV access on distributed network loss is of great significance for improving the economic benefits of power companies. Firstly, based on the spectral clustering method, the PV output curves in different scenarios are constructed, which reduces the computational complexity and computational error caused by the fluctuation of distributed PV output. Secondly, the daily load curve of each phase user is constructed by using the current and voltage curves and the PV output curve of each phase at the outlet of the distributed transformer area. Then, using the typical daily load curve and PV output curve of each phase user, a theoretical line loss calculation method based on the forward and backward substitution method of the distributed transformer area with distributed PV is constructed. Finally, the feasibility of the proposed algorithm is verified by the actual transformer area, which provides a theoretical basis for the line loss optimization of the distributed transformer area with distributed PV.