Abstract
Active power losses of distribution systems are higher than transmission ones, in which these losses affect the distribution operational costs directly. One of the efficient and effective methods for power losses reduction is distribution system reconfiguration (DSR). In this way, the network configuration is changed based on a specific power demand that has been already predicted by load forecasting techniques. The ohmic loss level in distribution system is affected by energy demand level, this is while an error in load forecasting can influence losses. Accordingly, including load uncertainty in DSR formulation is essential but this issue should not lead to change of the reconfiguration results significantly (i.e. the model should be robust). This paper presents a robust and efficient model for considering load uncertainty in network reconfiguration that is simple enough to implement in available commercial software packages and it is precise enough to find accurate solutions with low computational time. The analysis of results shows high efficiency and robustness of the proposed model for reconfiguration of distribution systems under demand uncertainty.
Highlights
Distribution network has a prominent role in delivering the electricity provided by transmission system to individual electric energy customers [1]
The results show that the point estimate method (PEM) is simpler and more flexible method than the Monte Carlo simulation (MCS) to analyze uncertainties in complex Distribution system reconfiguration (DSR) problems
Distribution networks are designed and operated based on an expected power demand predicted by load forecasting
Summary
Distribution network has a prominent role in delivering the electricity provided by transmission system to individual electric energy customers [1]. Part of power supplied by transmission system is lost as thermal energy because of distribution line resistance. The distribution power losses are higher than transmission ones as they affect the system operational costs and voltage profile. Minimization of power delivery losses is important for distribution network operators [2]. Distribution system reconfiguration (DSR) is an efficient way to reduce the distribution losses, in which network topology is changed by opening normally closed sectional switches and closing normally open tie line switches in a specific load level [3]. Loss minimization has been always important in DSR, voltage stability [4], load
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