OPERATION EFFECT TO VOLTAGE SAG IMMUNITY LEVELS OF AC CONTACTORS AT PETROCHEMICAL PLANT IN PAHANG, MALAYSIA

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CIRED 2019 - 1796.pdf (558.16 KB)
Paper number
1796
Working Group Number
Conference name
CIRED 2019
Conference date
3-6 June 2019
Conference location
Madrid, Spain
Peer-reviewed
Yes
Short title
Convener
Authors
MOKHTAR, KHALIS, TNB Energy Services, Malaysia
MD RAZIP, HAZRI DAHALAN, Universiti Malaysia Pahang, Malaysia
ABDUL LATIP, EFFINIZAM, TNB Energy Services, Malaysia
Abstract
Frequent voltage sag events at Gebeng Industrial Area posed a significant impact on the process lines of a petrochemical plant. Several of its important electrical/electronic equipment which is controlled by AC contactors had tripped, resulting in long downtime and high losses. In order to understand this power quality issue, the plant had collaborated with TNB Energy Services, a wholly owned subsidiary of Tenaga Nasional Berhad to evaluate its equipment immunity levels with respect to voltage sag. This paper aims to study and compare the immunity level of the AC contactor which is used in industrial operation over period of time. The contactors were sampled randomly and test was conducted at site. The response is benchmarked against Malaysian Standard MS IEC 61000-4-11 voltage-tolerance curve. Subsequently the result for test conducted within period of four (4) years is presented. Three out of five AC contactors show weakening of immunity levels and four out of five contactors exhibit an increase of exposure level when compared with actual power quality data. Finally, the options of improvement to ensure high ride through capability is proposed.
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Publisher
AIM
Date
2019-06-03
Published in
CIRED 2019 Conference
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/578
http://dx.doi.org/10.34890/801
ISSN
2032-9644
ISBN
978-2-9602415-0-1