Operational condition assessment of in-service distribution transformers

N Azis; D Zhou; Z D Wang; D Jones; B Wells; G M Wallwork

doi:10.1109/CMD.2012.6416364

Operational condition assessment of in-service distribution transformers

N Azis
, D Zhou
, Z D Wang
, D Jones
, B Wells
, G M Wallwork

Research output: Chapter in Book/Conference proceeding › Conference contribution › peer-review

Abstract

Oil tests are crucial for condition assessment of transformers. Moisture, acidity, breakdown voltage, dissolved gas analysis and furans analysis are common oil tests carried out by utilities. {IEC} 60422 and {IEC} 60599 have specified some limit values for detecting any abnormalities based on oil tests. However, these limit values might not be suitable for all transformers at different ages or under different operating conditions and relying too much on these values could be costly for transformer utilities. Trend analysis of oil condition monitoring data is useful in providing additional information for the detection of any abnormalities of transformers. In this paper, analysis on the oil condition monitoring data of 132 {kV} distribution transformers is presented. Typical percentile values are calculated for moisture, acidity, breakdown voltage and furans levels whose results are compared with the limit values provided in {IEC} 60422 and {IEEE} C57.106. Trend analysis of moisture, acidity, furans, Carbon Monoxide ({CO}) and Carbon Dioxide ({CO}$_{\textrm{2}}$) are carried out on a transformer population. Acidity is found to be strongly related to transformer age and a model is proposed to represent ageing of transformers based on acidity.

Original language	English
Title of host publication	Condition Monitoring and Diagnosis (CMD), 2012 International Conference on
Pages	1156-1159
Number of pages	4
DOIs	https://doi.org/10.1109/CMD.2012.6416364
Publication status	Published - 2012

Keywords

acidity
ageing byproducts and oil analysis
Aging
breakdown voltage
carbon dioxide
carbon monoxide
condition assessment
condition monitoring
dissolved gas analysis
distribution transformers
electric breakdown
furans analysis
{IEC} 60422
{IEC} 60599
{IEC} standards
{IEEE} C57.106
in-service distribution transformers
Market research
moisture
oil condition monitoring
Oil insulation
operational condition assessment
power transformer insulation
power transformers
transformer age
transformer population
Transformers condition assessment
transformer utilities
voltage 132 kV

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10.1109/CMD.2012.6416364

Cite this

@inproceedings{18dda9037b2246bbbe374359fe5ce684,

title = "Operational condition assessment of in-service distribution transformers",

abstract = "Oil tests are crucial for condition assessment of transformers. Moisture, acidity, breakdown voltage, dissolved gas analysis and furans analysis are common oil tests carried out by utilities. \{IEC\} 60422 and \{IEC\} 60599 have specified some limit values for detecting any abnormalities based on oil tests. However, these limit values might not be suitable for all transformers at different ages or under different operating conditions and relying too much on these values could be costly for transformer utilities. Trend analysis of oil condition monitoring data is useful in providing additional information for the detection of any abnormalities of transformers. In this paper, analysis on the oil condition monitoring data of 132 \{kV\} distribution transformers is presented. Typical percentile values are calculated for moisture, acidity, breakdown voltage and furans levels whose results are compared with the limit values provided in \{IEC\} 60422 and \{IEEE\} C57.106. Trend analysis of moisture, acidity, furans, Carbon Monoxide (\{CO\}) and Carbon Dioxide (\{CO\}\$\_\{\textbackslash{}textrm\{2\}\}\$) are carried out on a transformer population. Acidity is found to be strongly related to transformer age and a model is proposed to represent ageing of transformers based on acidity.",

keywords = "acidity, ageing byproducts and oil analysis, Aging, breakdown voltage, carbon dioxide, carbon monoxide, condition assessment, condition monitoring, dissolved gas analysis, distribution transformers, electric breakdown, furans analysis, \{IEC\} 60422, \{IEC\} 60599, \{IEC\} standards, \{IEEE\} C57.106, in-service distribution transformers, Market research, moisture, oil condition monitoring, Oil insulation, operational condition assessment, power transformer insulation, power transformers, transformer age, transformer population, Transformers condition assessment, transformer utilities, voltage 132 kV",

author = "N Azis and D Zhou and Wang, \{Z D\} and D Jones and B Wells and Wallwork, \{G M\}",

year = "2012",

doi = "10.1109/CMD.2012.6416364",

language = "English",

pages = "1156--1159",

booktitle = "Condition Monitoring and Diagnosis (CMD), 2012 International Conference on",

}

TY - GEN

T1 - Operational condition assessment of in-service distribution transformers

AU - Azis, N

AU - Zhou, D

AU - Wang, Z D

AU - Jones, D

AU - Wells, B

AU - Wallwork, G M

PY - 2012

Y1 - 2012

N2 - Oil tests are crucial for condition assessment of transformers. Moisture, acidity, breakdown voltage, dissolved gas analysis and furans analysis are common oil tests carried out by utilities. {IEC} 60422 and {IEC} 60599 have specified some limit values for detecting any abnormalities based on oil tests. However, these limit values might not be suitable for all transformers at different ages or under different operating conditions and relying too much on these values could be costly for transformer utilities. Trend analysis of oil condition monitoring data is useful in providing additional information for the detection of any abnormalities of transformers. In this paper, analysis on the oil condition monitoring data of 132 {kV} distribution transformers is presented. Typical percentile values are calculated for moisture, acidity, breakdown voltage and furans levels whose results are compared with the limit values provided in {IEC} 60422 and {IEEE} C57.106. Trend analysis of moisture, acidity, furans, Carbon Monoxide ({CO}) and Carbon Dioxide ({CO}$_{\textrm{2}}$) are carried out on a transformer population. Acidity is found to be strongly related to transformer age and a model is proposed to represent ageing of transformers based on acidity.

AB - Oil tests are crucial for condition assessment of transformers. Moisture, acidity, breakdown voltage, dissolved gas analysis and furans analysis are common oil tests carried out by utilities. {IEC} 60422 and {IEC} 60599 have specified some limit values for detecting any abnormalities based on oil tests. However, these limit values might not be suitable for all transformers at different ages or under different operating conditions and relying too much on these values could be costly for transformer utilities. Trend analysis of oil condition monitoring data is useful in providing additional information for the detection of any abnormalities of transformers. In this paper, analysis on the oil condition monitoring data of 132 {kV} distribution transformers is presented. Typical percentile values are calculated for moisture, acidity, breakdown voltage and furans levels whose results are compared with the limit values provided in {IEC} 60422 and {IEEE} C57.106. Trend analysis of moisture, acidity, furans, Carbon Monoxide ({CO}) and Carbon Dioxide ({CO}$_{\textrm{2}}$) are carried out on a transformer population. Acidity is found to be strongly related to transformer age and a model is proposed to represent ageing of transformers based on acidity.

KW - acidity

KW - ageing byproducts and oil analysis

KW - Aging

KW - breakdown voltage

KW - carbon dioxide

KW - carbon monoxide

KW - condition assessment

KW - condition monitoring

KW - dissolved gas analysis

KW - distribution transformers

KW - electric breakdown

KW - furans analysis

KW - {IEC} 60422

KW - {IEC} 60599

KW - {IEC} standards

KW - {IEEE} C57.106

KW - in-service distribution transformers

KW - Market research

KW - moisture

KW - oil condition monitoring

KW - Oil insulation

KW - operational condition assessment

KW - power transformer insulation

KW - power transformers

KW - transformer age

KW - transformer population

KW - Transformers condition assessment

KW - transformer utilities

KW - voltage 132 kV

U2 - 10.1109/CMD.2012.6416364

DO - 10.1109/CMD.2012.6416364

M3 - Conference contribution

SP - 1156

EP - 1159

BT - Condition Monitoring and Diagnosis (CMD), 2012 International Conference on

ER -

Operational condition assessment of in-service distribution transformers

Abstract

Keywords

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