الگوریتم ژنتیک برای تخصیص توزیع شده جهت کاهش تلفات ولتاژ

 الگوریتم ژنتیک برای تخصیص توزیع شده جهت کاهش تلفات ولتاژ

الگوریتم ژنتیک برای تخصیص توزیع شده جهت کاهش تلفات ولتاژ

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Using Genetic Algorithm for Distributed Generation Allocation to Reduce Losses and
Improve Voltage Profile

Abstract

This paper presents a method for the optimal allocation of Distributed generation in distribution systems. In this paper, our aim would be optimal distributed generation allocation for voltage profile improvement and loss reduction in distribution network. Genetic Algorithm (GA) was used as the solving tool, which referring two determined aim; the problem is defined and objective function is introduced. Considering to fitness values sensitivity in genetic algorithm process, there is needed to apply load flow for decision-making. Load flow algorithm is combined appropriately with GA, till access to acceptable results of this operation. We used MATPOWER package for load flow algorithm and composed it with our Genetic Algorithm. The suggested method is programmed under MATLAB software and applied ETAP software for evaluating of results correctness. It was implemented on part of Tehran electricity distributing grid. The resulting operation of this method on some testing system is illuminated improvement of voltage profile and loss reduction indexes.

Keywords

Distributed Generation, Allocation, Voltage Profile,
losses, Genetic Algorithm

I. INTRODUCTION

BEFORE installing distributed generation, its effects on voltage profile, line losses, short circuit current, amountsn of injected harmonic and reliability must be evaluated separately. The planning of the electric system with the presence of DG requires the definition of several factors, such as: the best technology to be used, the number and the capacity of the units, the best location, the type of network connection, etc. The impact of DG in system operating characteristics, such as electric losses, voltage profile, stability and reliability needs to be appropriately evaluated. The problem of DG allocation and sizing is of great importance. The installation of DG units at non-optimal places can result in an increase in system losses, implying in an increase in costs and, therefore, having an effect opposite to the desired. For that reason, the use of an optimization method capable of indicating the best solution for a given distribution network can be very useful for the system planning engineer. The selection of the best places for installation and the preferable.