A Power Flow Method for Radial Distribution Feeders with DER Penetration

Abstract

This paper presents a novel power flow method suitable for radial distribution feeders, which consists a modification of the simplified power flow concept known as the DistFlow method, already available in the literature. The proposed method relies upon a differentiated manipulation of power losses, which are taken into account in voltage calculations, unlike other simplified methods, where losses are totally neglected. As a result, calculation accuracy is greatly improved, in terms of node voltages, losses and overall active & reactive power flows. In addition, the proposed method is non-iterative and entirely linear, being easily implementable and fast in execution. The method is particularly suited for feeders with a high penetration of Distributed Energy Resources (DER), providing results that closely match those of a full non-linear power flow and are considerably more accurate than the traditional linearized distribution power flow methods, without any increase in computational burden. The new method is applied to a variety of case studies in the paper, to demonstrate its accuracy and effectiveness, comparing its performance with the simplified (linearized) DistFlow and a conventional non-linear power flow method.

A Simple and Efficient Power Flow for Distribution Networks

“…A Z-bus based 3-phase PF by modelling different models of loads and network parameters without considering the radial nature of DNs was suggested for DNs [8]. A PF method employing power loss derivatives with advantages of being non-iterative and efficient was outlined for DNs with DES [3]. A simple PF scheme adapting fixed matrices for relating load currents with line currents and then with bus voltages was proposed [31].…”

Soccer game optimization-based power flow for distribution networks

“…Anagnostopoulos and Papathanassiou (2019) outlined a PF method that accounts power loss differentials with features of being linear, non-iterative and fast, for DNs with high penetration of DGs. Venkata Krishna and Padma Srinivasu (2019) presented a direct PF method involving constant matrices that relate node currents with branch currents and then with node voltages.…”

Soccer league optimization for load flow analysis of power systems

“…Zhang et al 14 developed a bus-impedance-based LF method with an acceleration technique for enhancing the convergence. Anagnostopoulos et al 15 presented an efficient non-iterative LF technique involving the derivatives of power loss for distribution systems with DGs. Karimi et al 16 reviewed Newtonbased LF methods, state space search schemes, and distribution LF techniques in addition to discussing various issues of the existing LF techniques.…”