Distribution network reconfiguration validation with uncertain loads – network configuration determination and application

Abstract

Automatic load transfer (ALT) on the 11kV network is the process by which circuit breakers on the network are switched to form open points in order to feed load from different primary substations. Some of the potential benefits that may be gained from dynamically using ALT include maximising utilisation of existing assets, voltage regulation and reduced losses. One of the key issues, that has yet to be properly addressed in published research, is how to validate that the modelled benefits really exist. On an 11kV distribution network where the load is continually changing and the load on each distribution substation is unlikely to be monitored -reduction in losses from moving the normally open point is particularly difficult to prove. This paper proposes a method to overcome this problem and uses measured primary feeder data from two parts of the Western Power Distribution 11kV Network under different configurations. The process of choosing the different configurations is based on a heuristic modelling method of locating minimum voltages to help reduce losses.

Reconfiguration of distribution systems in the presence of distributed generation considering protective constraints and uncertainties

“…Distribution network reconfiguration is a nondifferentiable nonlinear constrained optimization problem . The solving approaches for the reconfiguration of the network are classified into three main groups: deterministic, heuristic, and stochastic (meta‐heuristic) approaches .…”

A new method for evaluation of harmonic distortion in reconfiguration of distribution network

“…However, all of these indices are designed according to the harmonic characteristics of the load. While in practical distribution networks, the spectrum of the harmonic currents changes continuously and maybe their values are unknown due to lack of reliable monitoring devices . Accordingly, in Reference , the effect of variable and unknown behavior of harmonic loads on distribution network studies is evaluated.…”

“…While in practical distribution networks, the spectrum of the harmonic currents changes continuously and maybe their values are unknown due to lack of reliable monitoring devices . Accordingly, in Reference , the effect of variable and unknown behavior of harmonic loads on distribution network studies is evaluated. Therefore, selection of a particular situation as a representative for the whole network states will not be accurate (eg, harmonic spectrum snapshot).…”

Two-level reconfiguration algorithm of branch exchange and variable neighbourhood search for active distribution network

“…With the continuous development of the economy and society, a growing number of distributed generations (DG) have been connected to the smart distribution network (Wang et al, 2017). Bai, Yiango, Dani, & Chris (2016), Nikolaos, Dimitris, Pavlos, and Nikos, (2017) and Xing and Sun, (2017) had proved that DG can reduce cost and improve the delivered power quality as well as system reliability. However, the renewable DG units cannot guarantee a fixed power output due to the uncertainties such as load demand, wind speed, and solar radiation.…”