Simultaneous capacitor placement and reconfiguration for loss reduction in distribution networks by a hybrid genetic algorithm

2011 ◽  
Author(s):  
Salomao Madeiro ◽  
Edson Galvao ◽  
Celso Cavellucci ◽  
Christiano Lyra ◽  
Fernando Von Zuben
Keyword(s):  
Genetic Algorithm ◽  
Hybrid Genetic Algorithm ◽  
Distribution Networks ◽  
Loss Reduction ◽  
Capacitor Placement

Optimal Capacitor Allocation Based on Fuzzy Inference and Fuzzy Multi-Objective Programming in Distribution Network

2011 ◽  
Vol 354-355 ◽  
pp. 1099-1104
Author(s):  
Wei Wang ◽  
Ji Liang Zhang ◽  
Bao Yin Li
Keyword(s):  
Fuzzy Inference ◽  
Distribution Networks ◽  
Test System ◽  
Loss Reduction ◽  
Inference Method ◽  
Multi Objective ◽  
Multi Objective Programming ◽  
Capacitor Placement ◽  
Capacitor Allocation ◽  
Objective Programming

This paper presents an algorithm using a stepwise programming method to determine the suitable locations for capacitors installations and their ratings in distribution networks. The Voltage and loss reduction capability of nodes are regarded as input indices. The fuzzy inference method is used to obtain capacitor placement suitability of every node. The node having the highest suitability is selected as the compensation node. The energy losses of three time periods and the peak charge are modeled as optimization objective. Fuzzy multi-objective programming is used to determine the proper sizes of the capacitors. Considering the each capacitor rating interaction, the circulation calculation method is used to recalculate the capacitor rating for compensated nodes. The results of test system demonstrate the effectiveness and practicability of the method.

Hybrid genetic algorithm in the optimization of energy costs in water supply networks

2010 ◽  
Vol 10 (3) ◽  
pp. 315-326 ◽  
Author(s):  
L. H. M. Costa ◽  
H. M. Ramos ◽  
M. A. H. de Castro
Keyword(s):  
Genetic Algorithm ◽  
Water Supply ◽  
Distribution Systems ◽  
Water Distribution ◽  
Hybrid Genetic Algorithm ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Energy Costs ◽  
Efficient Operation ◽  
Operational Strategies

Efficient operation of water distribution systems is linked with the assurance of water availability to the population. In general, the operational rules applied to water distribution networks have as a sole objective the continuity of the water supply and disregards saving energy costs related to the operation of the pumps. The task of determining optimal operational procedures involves several elements such as the daily variation of water consumption, energy cost rates and the level of the tanks and reservoirs. This work presents a hybrid genetic algorithm which is connected to the widely known software EPANET, in order to determine operational strategies in water supply with reduced energy costs. The model is applied to a hypothetical example and to a real water distribution network located in the city of Ourém, in Portugal.

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