Voltage dip performance analysis.

The power quality performance of South African utilities has been regulated through the application of NRS 048-2 standard. The earliest edition of the power quality standard (NRS 048- 2:1996) defines compatibility levels for voltage dips in the form of annual dip limits for each voltage dip type. Ac...

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Main Author: Nzimande, Timothy M.
Other Authors: Ijumba, Nelson M.
Language:en
Published: 2010
Subjects:
Online Access:http://hdl.handle.net/10413/77
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spelling ndltd-netd.ac.za-oai-union.ndltd.org-ukzn-oai-http---researchspace.ukzn.ac.za-10413-772014-02-08T03:49:07ZVoltage dip performance analysis.Nzimande, Timothy M.Electric power distribution--Quality control.Theses--Electrical engineering.The power quality performance of South African utilities has been regulated through the application of NRS 048-2 standard. The earliest edition of the power quality standard (NRS 048- 2:1996) defines compatibility levels for voltage dips in the form of annual dip limits for each voltage dip type. Actual measured utility dip performance has consistently resulted in higher dip numbers than the limits imposed in the standard. On the other hand, the dip limits were considered to be less restrictive by industrial customers. The revised power quality standard addresses the difficulties in managing voltage dip performance based on dip limits as specified in the first edition of NRS 048-2. This new philosophy does not define dip limits; instead, utilities are required to develop specific strategies to manage dip performance according to customer requirements. This research work develops an alternative approach to the management of dip performance as opposed to the application of dip limits. The study analyses measured voltage dip records for a steel-processing plant and a pulp and paper plant. The supply network for each plant is modelled to define dip influence zones as a function of fault locations. The principal results of this study are critical circuits, causes of dips, dip influence zones and the key elements of the proposed approach in communicating dip performance. The optimised approach was presented to and adopted by the customers involved.Thesis (M.Sc.)-University of KwaZulu-Natal, Durban, 2009.Ijumba, Nelson M.Koch, Robert G.2010-08-15T14:24:27Z2010-08-15T14:24:27Z20092009Thesishttp://hdl.handle.net/10413/77en
collection NDLTD
language en
sources NDLTD
topic Electric power distribution--Quality control.
Theses--Electrical engineering.
spellingShingle Electric power distribution--Quality control.
Theses--Electrical engineering.
Nzimande, Timothy M.
Voltage dip performance analysis.
description The power quality performance of South African utilities has been regulated through the application of NRS 048-2 standard. The earliest edition of the power quality standard (NRS 048- 2:1996) defines compatibility levels for voltage dips in the form of annual dip limits for each voltage dip type. Actual measured utility dip performance has consistently resulted in higher dip numbers than the limits imposed in the standard. On the other hand, the dip limits were considered to be less restrictive by industrial customers. The revised power quality standard addresses the difficulties in managing voltage dip performance based on dip limits as specified in the first edition of NRS 048-2. This new philosophy does not define dip limits; instead, utilities are required to develop specific strategies to manage dip performance according to customer requirements. This research work develops an alternative approach to the management of dip performance as opposed to the application of dip limits. The study analyses measured voltage dip records for a steel-processing plant and a pulp and paper plant. The supply network for each plant is modelled to define dip influence zones as a function of fault locations. The principal results of this study are critical circuits, causes of dips, dip influence zones and the key elements of the proposed approach in communicating dip performance. The optimised approach was presented to and adopted by the customers involved. === Thesis (M.Sc.)-University of KwaZulu-Natal, Durban, 2009.
author2 Ijumba, Nelson M.
author_facet Ijumba, Nelson M.
Nzimande, Timothy M.
author Nzimande, Timothy M.
author_sort Nzimande, Timothy M.
title Voltage dip performance analysis.
title_short Voltage dip performance analysis.
title_full Voltage dip performance analysis.
title_fullStr Voltage dip performance analysis.
title_full_unstemmed Voltage dip performance analysis.
title_sort voltage dip performance analysis.
publishDate 2010
url http://hdl.handle.net/10413/77
work_keys_str_mv AT nzimandetimothym voltagedipperformanceanalysis
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