A novel method for optimal capacitor placement and sizing in distribution systems with nonlinear loads and DG using GA

Taher, Seyed Abbas; Hasani, Mohammad; Karimian, Ali

doi:10.1016/j.cnsns.2010.05.011

Cited by 65 publications

(23 citation statements)

References 26 publications

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“…Discrete capacitors and capacitors of the following sizes; 0.15, 0.3, 0.45, 0.6, 0.75, 0.9, 1.05 (MVar) have been used in this paper for optimization and the optimal capacitor value for each bus has been selected from the capacitors mentioned above [16].…”

Section: Parallel Capacitors Size Constraintsmentioning

confidence: 99%

“…The research that has been carried out commonly uses a constant power load, so the dependence of the load on the bus voltage has been neglected [14,15], this is despite the fact that in many real situations we have different types of load models such as the industrial, commercial and residential loads, these loads are closely associated with the bus voltage. Although the problem of harmonic pollution has been taken into account in different researches regarding the optimal placement of DG units and the optimal placement of capacitor banks [16,17] but rarely any attention has been paid to the effect of the harmonics on the simultaneous placement of DG units and capacitor banks in several studies that have been done.…”

Section: Introductionmentioning

confidence: 99%

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A Simultaneous Biogeography based Optimal Placement of DG Units and Capacitor Banks in Distribution Systems with Nonlinear Loads

Sadeghi

Ghaffarzadeh

2016

Journal of Electrical Engineering

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This paper uses a new algorithm namely biogeography based optimization (BBO) intended for the simultaneous placement of the distributed generation (DG) units and the capacitor banks in the distribution network. The procedure of optimization has been conducted in the presence of nonlinear loads (a cause of harmonic injection). The purpose of simultaneous optimal placement of the DG and the capacitor is the reduction of active and reactive losses. The difference in the values of loss reduction at different levels of the load have been included in the objective function and the considered objective function includes the constraints of voltage, size and the number of DG units and capacitor banks and the allowable range of the total harmonic distortion (THD) of the total voltage in accordance with the IEEE 519 standards. In this paper the placement has been performed on two load types ie constant and mixed power, moreover the effects of load models on the results and the effects of optimal placement on reduction of the THD levels have also been analyzed. The mentioned cases have been studied on a 33 bus radial distribution system.

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Section: Parallel Capacitors Size Constraintsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Simultaneous Biogeography based Optimal Placement of DG Units and Capacitor Banks in Distribution Systems with Nonlinear Loads

Sadeghi

Ghaffarzadeh

2016

Journal of Electrical Engineering

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“…For example, [19][20][21][22][23][24][25] are samples of investigating capacitor placement in the presence of distributed generation, but these papers did not distinguish the kind of distributed generation and did not survey power quality as such. In this paper, first harmful effects of distributed generation on system power quality are shown by applying several experiments.…”

Section: Introductionmentioning

confidence: 99%

A new method to reduce the adverse effects of wind power on power quality using reactive power compensating capacitors

Zahedi¹,

Amini²,

Falaghi³

2016

Turk J Elec Eng & Comp Sci

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Abstract:The usage of distributed generation resources, particularly distributed generation with renewable sources, has increased to generate electrical power close to consumers. One of the factors that can reduce penetration of distributed generation resources is the limitation of power quality, such as harmonic distortions. Distributed generation sources, in addition to producing power, due to using of power electronic converters and changing the power flow, increase harmonic currents. On the other hand, local compensation of reactive power by parallel capacitor banks is one of the effective methods to reduce power system losses and harmonic distortions. Since the capacitor impedance varies at different frequencies and resonance can be produced at harmonic frequencies, providing an efficient method to optimize capacitor banks' placement in the presence of nonlinear loads and distributed generation is important. In this paper, first the adverse effects of distributed generation on power system harmonic distortions and therefore on power quality are illustrated by experiments. The problem of the optimal capacitor placement in the presence of nonlinear loads and distributed generation (wind power) is then expressed as a fuzzy multiobjective model. In the proposed model, annual profit maximization resulting from loss reduction, bus voltage deviation minimization, and reduction of power system harmonics are considered as optimization objectives. The presented model is solved with a PSO algorithm and a special version of the backward-forward sweep considering the system harmonics. Efficiency of the proposed model is demonstrated by running experiments on an 18-bus IEEE distributed network.

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“…The most used artificial intelligences to solve OLSC problem are Evolutionary Algorithm (EA), Swarm Intelligence Algorithm (SIA), Neural Networks (NNs) and fuzzy sets. Also, in [9][10][11], GA or its improved branches were suggested to solve optimal capacitor placement. Main problem of GA is low convergence velocity, which authors of [12] have claimed that this problem is declined by methods based on the reduction of the search space of GAs or based on micro-GAs.…”

Section: Introductionmentioning

confidence: 99%

Optimal Location and Sizing of Shunt Capacitors in Distribution Systems by Considering Different Load Scenarios

Dideban¹,

Ghadimi²,

Ahmadi³

et al. 2013

Journal of Electrical Engineering and Technology

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-In this work, Self-adaptive Differential Evolutionary (SaDE) algorithm is proposed to solve Optimal Location and Size of Capacitor (OLSC) problem in radial distribution networks. To obtain the SaDE algorithm, two improvements have been applied on control parameters of mutation and crossover operators. To expand the study, three load conditions have been considered, i.e., constant, varying and effective loads. Objective function is introduced for the load conditions. The annual cost is fitness of problem, in addition to this cost, CPU time, voltage profile, active power loss and total installed capacitor banks and their related costs have been used for comparisons. To confirm the ability of each improvements of SaDE, the improvements are studied both in separate and simultaneous conditions. To verify the effectiveness of the proposed algorithm, it is tested on IEEE 10-bus and 34-bus radial distribution networks and compared with other approaches.

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A novel method for optimal capacitor placement and sizing in distribution systems with nonlinear loads and DG using GA

Cited by 65 publications

References 26 publications

A Simultaneous Biogeography based Optimal Placement of DG Units and Capacitor Banks in Distribution Systems with Nonlinear Loads

A Simultaneous Biogeography based Optimal Placement of DG Units and Capacitor Banks in Distribution Systems with Nonlinear Loads

A new method to reduce the adverse effects of wind power on power quality using reactive power compensating capacitors

Optimal Location and Sizing of Shunt Capacitors in Distribution Systems by Considering Different Load Scenarios

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