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Efficient framework for integrating distributed generation and capacitor banks considering simultaneous grid-connected and islanded distribution network operations

In literature, for the planning problem of simultaneous distributed generation (DG) and shunt capacitor banks (SCB) allocation in radial distribution networks (RDNs), researchers have focused mainly on the real power loss reduction and ignored the benefits of reactive power loss minimization, which...

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Main Author: Leghari, Zohaib Hussain
Format: Thesis
Language:English
Published: 2021
Subjects:
TK Electrical engineering. Electronics Nuclear engineering
Online Access:http://eprints.utm.my/id/eprint/102288/1/ZohaibHussainLeghariPSKE2021.pdf.pdf
http://eprints.utm.my/id/eprint/102288/
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spelling my.utm.1022882023-08-17T00:34:05Z http://eprints.utm.my/id/eprint/102288/ Efficient framework for integrating distributed generation and capacitor banks considering simultaneous grid-connected and islanded distribution network operations Leghari, Zohaib Hussain TK Electrical engineering. Electronics Nuclear engineering In literature, for the planning problem of simultaneous distributed generation (DG) and shunt capacitor banks (SCB) allocation in radial distribution networks (RDNs), researchers have focused mainly on the real power loss reduction and ignored the benefits of reactive power loss minimization, which might not distribute DGs and SCBs at the desirable locations. In addition, a variety of metaheuristic optimization techniques have been employed in literature whose implementation involves either the number of phases or tuning of certain algorithm-specific parameters. In contrast, the Jaya algorithm (JA) is a simple and efficient single-phase optimization algorithm that is free from any parameter tuning. However, the JA also suffers from inadequacies of population diversity and premature convergence; therefore, require a mechanism to overcome these deficiencies. Furthermore, past studies conducted for the islanded networks have followed the approach of isolated operation and did not consider the power supply-demand imbalance condition, which will result allocation of oversized DGs and SCBs. Considering these facts, this research work proposes a two-stage planning approach for the efficient utilization of DGs and SCBs for the simultaneous grid-connected and islanded operations of the RDNs. The first stage determines the optimal installation locations and capacities of DGs and SCBs, and operating power factor of DGs using an improved variant of the JA (IJaya) to minimize the total power loss and voltage deviation during the gridconnected operation. For the proposed IJaya, a dynamic weight parameter based grid-search mechanism has been introduced to mitigate the problem of premature convergence and population diversity in JA. The performance of the IJaya was evaluated using the IEEE 33-bus and 69-bus RDNs. A comparative analysis with existing optimization methods reveals that the IJaya achieves up to 38.84% more reduction in power losses and 3.26% more voltage improvement. In the later part of the study, a methodology concerning the efficient and maximum utilization of the installed DG-SCB capacity in the islanded RDN under power imbalance conditions has been proposed. For that, a multiobjective minimization function incorporating the total power loss and under-utilization of available DG-SCB capacity has been established. To minimize the proposed function, an iterative analytical approach has been proposed to tune the source power factor. The results showed that the underutilization of available DG-SCB capacity varies up to 15.83% for the power factors ranging from 0.8 to 0.93. Expectedly, the proposed study will assist the utility companies to efficiently operate their distribution systems and to design effective energy management schemes for the customers. 2021 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/102288/1/ZohaibHussainLeghariPSKE2021.pdf.pdf Leghari, Zohaib Hussain (2021) Efficient framework for integrating distributed generation and capacitor banks considering simultaneous grid-connected and islanded distribution network operations. PhD thesis, Universiti Teknologi Malaysia. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:149286
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TK Electrical engineering. Electronics Nuclear engineering
spellingShingle TK Electrical engineering. Electronics Nuclear engineering
Leghari, Zohaib Hussain
Efficient framework for integrating distributed generation and capacitor banks considering simultaneous grid-connected and islanded distribution network operations
description In literature, for the planning problem of simultaneous distributed generation (DG) and shunt capacitor banks (SCB) allocation in radial distribution networks (RDNs), researchers have focused mainly on the real power loss reduction and ignored the benefits of reactive power loss minimization, which might not distribute DGs and SCBs at the desirable locations. In addition, a variety of metaheuristic optimization techniques have been employed in literature whose implementation involves either the number of phases or tuning of certain algorithm-specific parameters. In contrast, the Jaya algorithm (JA) is a simple and efficient single-phase optimization algorithm that is free from any parameter tuning. However, the JA also suffers from inadequacies of population diversity and premature convergence; therefore, require a mechanism to overcome these deficiencies. Furthermore, past studies conducted for the islanded networks have followed the approach of isolated operation and did not consider the power supply-demand imbalance condition, which will result allocation of oversized DGs and SCBs. Considering these facts, this research work proposes a two-stage planning approach for the efficient utilization of DGs and SCBs for the simultaneous grid-connected and islanded operations of the RDNs. The first stage determines the optimal installation locations and capacities of DGs and SCBs, and operating power factor of DGs using an improved variant of the JA (IJaya) to minimize the total power loss and voltage deviation during the gridconnected operation. For the proposed IJaya, a dynamic weight parameter based grid-search mechanism has been introduced to mitigate the problem of premature convergence and population diversity in JA. The performance of the IJaya was evaluated using the IEEE 33-bus and 69-bus RDNs. A comparative analysis with existing optimization methods reveals that the IJaya achieves up to 38.84% more reduction in power losses and 3.26% more voltage improvement. In the later part of the study, a methodology concerning the efficient and maximum utilization of the installed DG-SCB capacity in the islanded RDN under power imbalance conditions has been proposed. For that, a multiobjective minimization function incorporating the total power loss and under-utilization of available DG-SCB capacity has been established. To minimize the proposed function, an iterative analytical approach has been proposed to tune the source power factor. The results showed that the underutilization of available DG-SCB capacity varies up to 15.83% for the power factors ranging from 0.8 to 0.93. Expectedly, the proposed study will assist the utility companies to efficiently operate their distribution systems and to design effective energy management schemes for the customers.
format Thesis
author Leghari, Zohaib Hussain
author_facet Leghari, Zohaib Hussain
author_sort Leghari, Zohaib Hussain
title Efficient framework for integrating distributed generation and capacitor banks considering simultaneous grid-connected and islanded distribution network operations
title_short Efficient framework for integrating distributed generation and capacitor banks considering simultaneous grid-connected and islanded distribution network operations
title_full Efficient framework for integrating distributed generation and capacitor banks considering simultaneous grid-connected and islanded distribution network operations
title_fullStr Efficient framework for integrating distributed generation and capacitor banks considering simultaneous grid-connected and islanded distribution network operations
title_full_unstemmed Efficient framework for integrating distributed generation and capacitor banks considering simultaneous grid-connected and islanded distribution network operations
title_sort efficient framework for integrating distributed generation and capacitor banks considering simultaneous grid-connected and islanded distribution network operations
publishDate 2021
url http://eprints.utm.my/id/eprint/102288/1/ZohaibHussainLeghariPSKE2021.pdf.pdf
http://eprints.utm.my/id/eprint/102288/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:149286
_version_ 1775621965321601024
score 13.211869

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