access icon free Optimal distributed generation placement in shunt capacitor compensated distribution systems considering voltage sag and harmonics distortions

© The Institution of Engineering and Technology
Received 19/06/2013, Accepted 14/11/2013, Revised 01/11/2013, Published 29/01/2014

The present study proposes a method of solving the distributed generations (DGs) placement problem by considering multiple aspects of a power system operation. In addition to the commonly considered objectives of reduction of the loss and improvement of the voltage profile, this study has optimised other power quality related objectives such as minimisation of the voltage sag and harmonic distortion. A new formulation of a composite, constrained objective function is put forward by considering objectives such as the cost of the power losses, the cost of the DGs and the cost of loss of load because of the voltage sag and the constraints such as line flow limits, number/size of the installed DGs and the power quality limits of the standard IEEE-519. The system under consideration is a complex one consisting of both linear and non-linear loads as well as the power factor correcting capacitors. The effect of the non-linear harmonic generating loads and the compensating capacitors on the penetration of the DGs in the distribution system is investigated. This optimisation problem is solved for several distribution systems by using several metaheuristic optimisation techniques. However, detailed results are presented on a benchmark IEEE 33 bus radial distribution system using genetic algorithm to demonstrate the effectiveness of the proposed method. A comparative performance analysis of various metaheuristic optimisation techniques is also presented to show the applicability of different optimisation techniques in solving the proposed optimisation problem.

Inspec keywords: power factor correction; power supply quality; genetic algorithms; power generation planning; power system harmonics; power distribution planning; distributed power generation; power capacitors

Other keywords: power quality; line flow limits; optimal distributed generation placement; nonlinear load; harmonics distortion; IEEE 33 bus radial distribution system; voltage sag; shunt capacitor compensated distribution systems; optimisation problem; power factor correcting capacitors; metaheuristic optimisation technique; voltage profile; genetic algorithm

Subjects: Optimisation techniques; Power supply quality and harmonics; Power system planning and layout; Distributed power generation; Other power apparatus and electric machines; Distribution networks

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