Optimal power flow using the gradient method to reduce electrical losses in power systems

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Jesús María López Lezama
Luis Alfonso Gallego Pareja

Keywords

optimal power flow, active power losses reduction, optimization in power systems

Abstract

This paper presents an optimal power flow model using the gradient method for the reduction of losses in power systems. The algorithm allows adjusting a set of control variables to find an operation point that minimizes active power losses. The method is based on the power flow solution by Newton’s method. Limits on idependent variables are handled using penalty functions. The algorithm performance is tested using two different approaches to calculate the step size along the feasible direction: a constant step size and a variable step size using the parable adjustment method.

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