Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
A heuristic optimal approach for coordinated volt/var control in distribution networks
Dissertation (MEng)--University of Pretoria, 2015.
Saved in:
| Other Authors: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
University of Pretoria
2015
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613596155904000 |
|---|---|
| access_status_str | Open Access |
| author2 | Xia, Xiaohua |
| author_browse | Xia, Xiaohua |
| author_facet | Xia, Xiaohua |
| collection | Thesis |
| dc_rights_str_mv | © 2015 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MEng)--University of Pretoria, 2015. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/43905 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:38:39.160Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/43905 A heuristic optimal approach for coordinated volt/var control in distribution networks Xia, Xiaohua Zhang, Jiangfeng Mokgonyana, Lesiba Voltage control Reactive power control Particle swarm optimization (PSO) Distribution network On-load tap changer Capacitor Losses UCTD Dissertation (MEng)--University of Pretoria, 2015. This dissertation focuses on daily volt/var control in distribution networks with feeder capacitors, substation capacitors and transformers equipped with on-load tap changers. A hybrid approach is proposed to solve the daily volt/var control problem. To reduce the computational requirements of the problem, this approach combines two methods, namely heuristic and optimal scheduling for the substation and feeder sub-problems respectively. The feeder capacitor dispatch schedule is determined based on a heuristic reactive power setpoint method. At this stage the objective is to minimize the reactive power flow through the substation bus in every time-interval. And as such, mathematical modeling of the distribution network components is adapted to suit time-varying conditions. Furthermore, an optimization model to determine a proper dispatch schedule of the substation devices is formulated. The objective of this model is to minimize the daily total energy loss and voltage deviations. Additionally, the reference voltage of the substation secondary bus and the transformer tap position limits are modified to adapt to given load profiles. The optimization model is solved with a discrete particle swarm optimization algorithm, which incorporates Newton’s method to determine the power-flow solution. The proposed method is applied to a time-varying distribution system and evaluated under different operational scenarios. It is also compared to on-line volt/var control with various settings. Simulation results show that the proposed approach minimizes both the voltage deviations and the total energy loss, while on-line control prioritizes one objective over the other depending on the specified settings. Electrical, Electronic and Computer Engineering Unrestricted 2015-03-10T06:57:13Z 2015-03-10T06:57:13Z 2015-04-23 2015 Dissertation Mokgonyana, L 2015, A heuristic optimal approach for coordinated volt/var control in distribution networks, MEng dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/43905> A2015 http://hdl.handle.net/2263/43905 en © 2015 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | Voltage control Reactive power control Particle swarm optimization (PSO) Distribution network On-load tap changer Capacitor Losses UCTD A heuristic optimal approach for coordinated volt/var control in distribution networks |
| title | A heuristic optimal approach for coordinated volt/var control in distribution networks |
| title_full | A heuristic optimal approach for coordinated volt/var control in distribution networks |
| title_fullStr | A heuristic optimal approach for coordinated volt/var control in distribution networks |
| title_full_unstemmed | A heuristic optimal approach for coordinated volt/var control in distribution networks |
| title_short | A heuristic optimal approach for coordinated volt/var control in distribution networks |
| title_sort | heuristic optimal approach for coordinated volt var control in distribution networks |
| topic | Voltage control Reactive power control Particle swarm optimization (PSO) Distribution network On-load tap changer Capacitor Losses UCTD |
| url | http://hdl.handle.net/2263/43905 |