Investigating the application of frequency response analysis for diagnosing tap changer on power transformer
Electrical distribution power transformers operate on transmission and distribution systems which require different voltage levels. A sufficiently constant level of grid potential is maintained by mechanically regulating the turn ratio in the transformer winding, which can be achieved through OLTC o...
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| Format: | Thesis |
| Language: | English English English |
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2018
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| Online Access: | http://eprints.uthm.edu.my/433/1/24p%20MUSAED%20MOHAMMED%20AHMED%20AL-SUBARI.pdf http://eprints.uthm.edu.my/433/2/MUSAED%20MOHAMMED%20AHMED%20AL-SUBARI%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/433/3/MUSAED%20MOHAMMED%20AHMED%20AL-SUBARI%20WATERMARK.pdf |
| _version_ | 1796868269804617728 |
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| author | Ahmed Al-subari, Musaed Mohammed |
| author_facet | Ahmed Al-subari, Musaed Mohammed |
| author_sort | Ahmed Al-subari, Musaed Mohammed |
| collection | UTHM |
| description | Electrical distribution power transformers operate on transmission and distribution systems which require different voltage levels. A sufficiently constant level of grid potential is maintained by mechanically regulating the turn ratio in the transformer winding, which can be achieved through OLTC or DETC. Since the tap changer is the only moving component of the transformer, it is particularly vulnerable to degradation mechanism. Many diagnosis tools have been developed to evaluate the mechanical integrity of tap contacts since many years ago. However, studies related tap changer diagnosis using FRA is still lacking. This thesis adapts, frequency response analysis which is proven to be a powerful and globally popular diagnostic tool in detecting power transformer mechanical integrity. Since this method is comparative, thus interpretation of FRA signal is still challenge and required skilled personnel to identify the cause of Fault. Two common tap changer deformation mechanisms and four types of transformer based connection test types are established. A lumped transformer model has been developed to identify the underline causes of FRA response curve changes between faulty and normal conditions for better interpretation. This model mainly focusses on low and mid frequency regions due to fact, that major changes occurs at the above-mentioned regions. In addition to that, this new technique of OLTC diagnosis will be recommended for future detection of tap changers faults and diagnosis of winding degradations simultaneously since they are interconnected by using the same instrument. |
| first_indexed | 2024-03-05T21:37:19Z |
| format | Thesis |
| id | uthm.eprints-433 |
| institution | Universiti Tun Hussein Onn Malaysia |
| language | English English English |
| last_indexed | 2024-03-05T21:37:19Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | uthm.eprints-4332021-07-25T06:21:43Z http://eprints.uthm.edu.my/433/ Investigating the application of frequency response analysis for diagnosing tap changer on power transformer Ahmed Al-subari, Musaed Mohammed TK2000-2891 Dynamoelectric machinery and auxiliaries. Including generators, motors, transformers Electrical distribution power transformers operate on transmission and distribution systems which require different voltage levels. A sufficiently constant level of grid potential is maintained by mechanically regulating the turn ratio in the transformer winding, which can be achieved through OLTC or DETC. Since the tap changer is the only moving component of the transformer, it is particularly vulnerable to degradation mechanism. Many diagnosis tools have been developed to evaluate the mechanical integrity of tap contacts since many years ago. However, studies related tap changer diagnosis using FRA is still lacking. This thesis adapts, frequency response analysis which is proven to be a powerful and globally popular diagnostic tool in detecting power transformer mechanical integrity. Since this method is comparative, thus interpretation of FRA signal is still challenge and required skilled personnel to identify the cause of Fault. Two common tap changer deformation mechanisms and four types of transformer based connection test types are established. A lumped transformer model has been developed to identify the underline causes of FRA response curve changes between faulty and normal conditions for better interpretation. This model mainly focusses on low and mid frequency regions due to fact, that major changes occurs at the above-mentioned regions. In addition to that, this new technique of OLTC diagnosis will be recommended for future detection of tap changers faults and diagnosis of winding degradations simultaneously since they are interconnected by using the same instrument. 2018-01 Thesis NonPeerReviewed text en http://eprints.uthm.edu.my/433/1/24p%20MUSAED%20MOHAMMED%20AHMED%20AL-SUBARI.pdf text en http://eprints.uthm.edu.my/433/2/MUSAED%20MOHAMMED%20AHMED%20AL-SUBARI%20COPYRIGHT%20DECLARATION.pdf text en http://eprints.uthm.edu.my/433/3/MUSAED%20MOHAMMED%20AHMED%20AL-SUBARI%20WATERMARK.pdf Ahmed Al-subari, Musaed Mohammed (2018) Investigating the application of frequency response analysis for diagnosing tap changer on power transformer. Masters thesis, Universiti Tun Hussein Onn Malaysia. |
| spellingShingle | TK2000-2891 Dynamoelectric machinery and auxiliaries. Including generators, motors, transformers Ahmed Al-subari, Musaed Mohammed Investigating the application of frequency response analysis for diagnosing tap changer on power transformer |
| title | Investigating the application of frequency response analysis for diagnosing tap changer on power transformer |
| title_full | Investigating the application of frequency response analysis for diagnosing tap changer on power transformer |
| title_fullStr | Investigating the application of frequency response analysis for diagnosing tap changer on power transformer |
| title_full_unstemmed | Investigating the application of frequency response analysis for diagnosing tap changer on power transformer |
| title_short | Investigating the application of frequency response analysis for diagnosing tap changer on power transformer |
| title_sort | investigating the application of frequency response analysis for diagnosing tap changer on power transformer |
| topic | TK2000-2891 Dynamoelectric machinery and auxiliaries. Including generators, motors, transformers |
| url | http://eprints.uthm.edu.my/433/1/24p%20MUSAED%20MOHAMMED%20AHMED%20AL-SUBARI.pdf http://eprints.uthm.edu.my/433/2/MUSAED%20MOHAMMED%20AHMED%20AL-SUBARI%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/433/3/MUSAED%20MOHAMMED%20AHMED%20AL-SUBARI%20WATERMARK.pdf |
| work_keys_str_mv | AT ahmedalsubarimusaedmohammed investigatingtheapplicationoffrequencyresponseanalysisfordiagnosingtapchangeronpowertransformer |