The Optimal Placement and Sizing of Distributed Generation in an Active Distribution Network with Several Soft Open Points

Eshan Karunarathne,Dilini Almeida,Janaka Ekanayake,Jagadeesh Pasupuleti

doi:10.3390/en14041084

Eshan Karunarathne, Dilini Almeida + Show 2 more

Open Access

https://doi.org/10.3390/en14041084

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Journal: Energies	Publication Date: Feb 19, 2021
Citations: 30	License type: CC BY 4.0

Affiliation: Universiti Tenaga Nasional, University of Peradeniya

Abstract

A competent methodology based on the active power loss reduction for optimal placement and sizing of distributed generators (DGs) in an active distribution network (ADN) with several soft open points (SOPs) is proposed. A series of SOP combinations are explored to generate different network structures and they are utilized in the optimization framework to identify the possible solutions with minimum power loss under normal network conditions. Furthermore, a generalized methodology to optimize the size and the location of a predefined number of DGs with a predefined number of SOPs is presented. A case study on the modified IEEE 33 bus system with three DGs and five SOPs was conducted and hence the overall network power loss and the voltage improvement were examined. The findings reveal that the system loss of the passive network without SOPs and DGs is reduced by 79.5% using three DGs and five SOPs. In addition, this research work introduces a framework using the DG size and the impedance to the DG integration node, to propose a region where the DGs can be optimally integrated into an ADN that includes several SOPs.

Highlights

The minimum active power loss was recorded as 43.167 kW with five soft open points (SOPs) (32nd structure) and it corresponds to a power loss reduction of 79.5% compared to the passive network loss without SOPs and distributed generators (DGs), which is 210 kW
Once the DGs are precisely adopted into such a network, the loss reduction of the network could be further enhanced
In pursuanceinofterms investigating theloss benefits that arewith attributed presented to evaluate the performance of power reduction a predefined number of DGs and SOPs in the network

Summary

Introduction

It is anticipated that the major share of renewable energy-based power plants will be connected as distributed generators (DGs). [2] as electric power generators or storage typically ranging from few kilowatts to tens of megawatts, which is not a part of a large central power system and is located nearer to the demand. They reduce the demand for centralized power generation, the losses incurred by lengthy transmission lines, and the voltage instability closer to the feeder endpoints.

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Discussion

Conclusion