Increasing hosting capacity of distribution systems for renewable distributed generation by means of network reconfiguration

Search for this publication on Google Scholar
Ghiafeh Davoudi, M. (2017). Increasing hosting capacity of distribution systems for renewable distributed generation by means of network reconfiguration. Unc Charlotte Electronic Theses And Dissertations.
Download PDF

Analytics

355 views ◎
319 downloads ⇓


Abstract

This work aims at allowing for increased penetration of renewable distributed generation (DG) in the power distribution system (DS). The means to achieve this goal is changing the DS topological structure, i.e. by network reconfiguration (NR). In this work, first, a method is presented to determine the maximum allowable DG capacity based on steady-state bus voltage and line current operating limits. DS meshed topology is then investigated as a potential solution to allow for an increased installed DG capacity. This is motivated by the impacts of meshed configuration on DS stiffness, which represents the relative strength of the DS at the DG Point of Interconnection (POI). A novel NR problem is then formulated to allow for higher DG penetration while maintaining operating constraints. Although conventional NR formulations include the constraint to keep a radial topology, the radiality constraint is relaxed in this work to consider both radial and meshed configurations. Moreover, in order to minimize the impacts of variable and intermittent DG output on system bus voltages, the relationship between the DS bus impedance matrix and bus voltage variations due to power output changes is derived and incorporated in the proposed NR problem formulation. Minimization of voltage variations at the POI and at remote buses of interest (e.g. voltage-sensitive loads or voltage regulating devices) are considered. The proposed NR method is then evaluated under various test cases, including different locations of DG installation, single and multi-DG cases, different DG power factors, and DS loading conditions. The presented NR scheme shows several added benefits, including robustness to system loading conditions, with consequent reduction in switching actions, and minimized operations of voltage regulating devices.

Details
Author

Ghiafeh Davoudi, Masoud

Title

Increasing hosting capacity of distribution systems for renewable distributed generation by means of network reconfiguration

Physical Description

1 online resource (119 pages) : PDF

Date

2017

Degree Granting Institution

University of North Carolina at Charlotte

Abstract

This work aims at allowing for increased penetration of renewable distributed generation (DG) in the power distribution system (DS). The means to achieve this goal is changing the DS topological structure, i.e. by network reconfiguration (NR). In this work, first, a method is presented to determine the maximum allowable DG capacity based on steady-state bus voltage and line current operating limits. DS meshed topology is then investigated as a potential solution to allow for an increased installed DG capacity. This is motivated by the impacts of meshed configuration on DS stiffness, which represents the relative strength of the DS at the DG Point of Interconnection (POI). A novel NR problem is then formulated to allow for higher DG penetration while maintaining operating constraints. Although conventional NR formulations include the constraint to keep a radial topology, the radiality constraint is relaxed in this work to consider both radial and meshed configurations. Moreover, in order to minimize the impacts of variable and intermittent DG output on system bus voltages, the relationship between the DS bus impedance matrix and bus voltage variations due to power output changes is derived and incorporated in the proposed NR problem formulation. Minimization of voltage variations at the POI and at remote buses of interest (e.g. voltage-sensitive loads or voltage regulating devices) are considered. The proposed NR method is then evaluated under various test cases, including different locations of DG installation, single and multi-DG cases, different DG power factors, and DS loading conditions. The presented NR scheme shows several added benefits, including robustness to system loading conditions, with consequent reduction in switching actions, and minimized operations of voltage regulating devices.

Genre

doctoral dissertations

Subjects--Topics

Electrical engineering

Degree

Ph.D.

Subject Area

Electrical Engineering

Advisor(s)

Cecchi, Valentina

Committee Members

Cecchi, Valentina
Romero Agüero, Julio
Kamalasadan, Sukumar
Chowdhury, Badrul
Miri, Mehdi
Noras, Maciej

Degree Note

Thesis (Ph.D.)--University of North Carolina at Charlotte, 2017.

Rights Statement

This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). For additional information, see http://rightsstatements.org/page/InC/1.0/.

Rights Holder Information

Copyright is held by the author unless otherwise indicated.

Identifier

GhiafehDavoudi_uncc_0694D_11377

Permalink

http://hdl.handle.net/20.500.13093/etd:201