PROJECT TITLE :

Fast Decoupled Power Flow to Emerging Distribution Systems via Complex pu Normalization

ABSTRACT:

This paper proposes a generalized approach of the per unit normalization, named complex per unit normalization (cpu), to improve the performance of fast decoupled power flow methods applied to emerging distribution networks. The proposed approach takes into account the changes envisaged and additionally already faced by distribution systems, like high penetration of generation sources and a lot of interconnection between feeders, while considering the standard characteristics of distribution systems, as the high R/X ratios. These characteristics impose difficulties on the performance of each backward-forward sweep and decoupled-based mostly power flow methods. The cpu concept is centred on the utilization of a advanced volt-ampere base, that overcomes the numerical issues raised by the high R/X ratios of distribution feeders. As a consequence, decoupled power flow strategies can be efficiently applied to distribution system analysis. The performance of the proposed technique and the simplicity of adapting it to existing power flow programs are addressed within the paper. Completely different distribution network configurations and cargo conditions are used to illustrate and evaluate the utilization of cpu.