An Approach to Performing Stability Analysis for Power Transformer Differential Protection: A Case Study
Differential protection normally detects short circuits and ground faults in the windings of a power transformer and its terminals. Inter-turn faults refer to flashovers among the electrodes that arise only in a similar type of physical winding. Inter-turn faults can be examined when the adequate su...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-12-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/15/24/9603 |
| _version_ | 1827639978102882304 |
|---|---|
| author | Muhammad Sheryar Muhammad Ahsan Ali Farhana Umer Zeeshan Rashid Muhammad Amjad Zunaib Maqsood Haider Muhammad Omer Khan |
| author_facet | Muhammad Sheryar Muhammad Ahsan Ali Farhana Umer Zeeshan Rashid Muhammad Amjad Zunaib Maqsood Haider Muhammad Omer Khan |
| author_sort | Muhammad Sheryar |
| collection | DOAJ |
| description | Differential protection normally detects short circuits and ground faults in the windings of a power transformer and its terminals. Inter-turn faults refer to flashovers among the electrodes that arise only in a similar type of physical winding. Inter-turn faults can be examined when the adequate sum of turns is served as short-circuited. In electrical protection, it is difficult to detect inter-turn faults. An inter-turn fault of small magnitude is based on the limited number of turns that resultantly provide a large quantity of current. Due to this reason, protection that comes from the differential scenario possesses a higher degree of sensitivity without causing unwanted operations during external faults. In this paper, a protection-based stability method is proposed whereby external voltages are applied at the low-voltage (LV) side of the transformer while keeping the high-voltage (HV) side short-circuited. This was conducted using a three-phase power transformer (rating: 100 MVA, 380 kV/13.8 kV) at SWCC Shoaiba Power Plant, Saudi Arabia. In this work, differential protection (87T) and high-impedance differential protection for HV-restricted earth faults (REFs) were verified by creating In-Zone and Out-Zone fault conditions to ensure current transformer (CT) circuits and tripping logic. All of the IEDs, protection, and control schemes involved were designed by ABB. This method verifies protection stability for power transformers by implementing differential protection (87T) and high-impedance restricted earth fault (64HV) schemes through creating In-Zone and Out-Zone fault conditions. |
| first_indexed | 2024-03-09T16:51:34Z |
| format | Article |
| id | doaj.art-3a5772330b3f42a48c2de354223472ee |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T16:51:34Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-3a5772330b3f42a48c2de354223472ee2023-11-24T14:40:02ZengMDPI AGEnergies1996-10732022-12-011524960310.3390/en15249603An Approach to Performing Stability Analysis for Power Transformer Differential Protection: A Case StudyMuhammad Sheryar0Muhammad Ahsan Ali1Farhana Umer2Zeeshan Rashid3Muhammad Amjad4Zunaib Maqsood Haider5Muhammad Omer Khan6Department of Electrical Testing and Commissioning, Mansour Al Mosaid Group, Jeddah 22312, Saudi ArabiaDepartment of Electrical Testing and Commissioning, Mansour Al Mosaid Group, Jeddah 22312, Saudi ArabiaDepartment of Electrical Engineering, The Islamia University of Bahawalpur, Bahawalpur 63100, PakistanDepartment of Electrical Engineering, The Islamia University of Bahawalpur, Bahawalpur 63100, PakistanDepartment of Electronics Engineering, The Islamia University of Bahawalpur, Bahawalpur 63100, PakistanDepartment of Electrical Engineering, The Islamia University of Bahawalpur, Bahawalpur 63100, PakistanDepartment of Electrical Engineering & Technology, Riphah International University, Faisalabad 37000, PakistanDifferential protection normally detects short circuits and ground faults in the windings of a power transformer and its terminals. Inter-turn faults refer to flashovers among the electrodes that arise only in a similar type of physical winding. Inter-turn faults can be examined when the adequate sum of turns is served as short-circuited. In electrical protection, it is difficult to detect inter-turn faults. An inter-turn fault of small magnitude is based on the limited number of turns that resultantly provide a large quantity of current. Due to this reason, protection that comes from the differential scenario possesses a higher degree of sensitivity without causing unwanted operations during external faults. In this paper, a protection-based stability method is proposed whereby external voltages are applied at the low-voltage (LV) side of the transformer while keeping the high-voltage (HV) side short-circuited. This was conducted using a three-phase power transformer (rating: 100 MVA, 380 kV/13.8 kV) at SWCC Shoaiba Power Plant, Saudi Arabia. In this work, differential protection (87T) and high-impedance differential protection for HV-restricted earth faults (REFs) were verified by creating In-Zone and Out-Zone fault conditions to ensure current transformer (CT) circuits and tripping logic. All of the IEDs, protection, and control schemes involved were designed by ABB. This method verifies protection stability for power transformers by implementing differential protection (87T) and high-impedance restricted earth fault (64HV) schemes through creating In-Zone and Out-Zone fault conditions.https://www.mdpi.com/1996-1073/15/24/9603power transformerprotection reliabilitypower transformer protection sensitivitydifferential protectionexternal faultCT saturation |
| spellingShingle | Muhammad Sheryar Muhammad Ahsan Ali Farhana Umer Zeeshan Rashid Muhammad Amjad Zunaib Maqsood Haider Muhammad Omer Khan An Approach to Performing Stability Analysis for Power Transformer Differential Protection: A Case Study Energies power transformer protection reliability power transformer protection sensitivity differential protection external fault CT saturation |
| title | An Approach to Performing Stability Analysis for Power Transformer Differential Protection: A Case Study |
| title_full | An Approach to Performing Stability Analysis for Power Transformer Differential Protection: A Case Study |
| title_fullStr | An Approach to Performing Stability Analysis for Power Transformer Differential Protection: A Case Study |
| title_full_unstemmed | An Approach to Performing Stability Analysis for Power Transformer Differential Protection: A Case Study |
| title_short | An Approach to Performing Stability Analysis for Power Transformer Differential Protection: A Case Study |
| title_sort | approach to performing stability analysis for power transformer differential protection a case study |
| topic | power transformer protection reliability power transformer protection sensitivity differential protection external fault CT saturation |
| url | https://www.mdpi.com/1996-1073/15/24/9603 |
| work_keys_str_mv | AT muhammadsheryar anapproachtoperformingstabilityanalysisforpowertransformerdifferentialprotectionacasestudy AT muhammadahsanali anapproachtoperformingstabilityanalysisforpowertransformerdifferentialprotectionacasestudy AT farhanaumer anapproachtoperformingstabilityanalysisforpowertransformerdifferentialprotectionacasestudy AT zeeshanrashid anapproachtoperformingstabilityanalysisforpowertransformerdifferentialprotectionacasestudy AT muhammadamjad anapproachtoperformingstabilityanalysisforpowertransformerdifferentialprotectionacasestudy AT zunaibmaqsoodhaider anapproachtoperformingstabilityanalysisforpowertransformerdifferentialprotectionacasestudy AT muhammadomerkhan anapproachtoperformingstabilityanalysisforpowertransformerdifferentialprotectionacasestudy AT muhammadsheryar approachtoperformingstabilityanalysisforpowertransformerdifferentialprotectionacasestudy AT muhammadahsanali approachtoperformingstabilityanalysisforpowertransformerdifferentialprotectionacasestudy AT farhanaumer approachtoperformingstabilityanalysisforpowertransformerdifferentialprotectionacasestudy AT zeeshanrashid approachtoperformingstabilityanalysisforpowertransformerdifferentialprotectionacasestudy AT muhammadamjad approachtoperformingstabilityanalysisforpowertransformerdifferentialprotectionacasestudy AT zunaibmaqsoodhaider approachtoperformingstabilityanalysisforpowertransformerdifferentialprotectionacasestudy AT muhammadomerkhan approachtoperformingstabilityanalysisforpowertransformerdifferentialprotectionacasestudy |