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Relevant bibliographies by topics / Tap changer fault

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Academic literature on the topic 'Tap changer fault'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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Journal articles on the topic "Tap changer fault"

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Jin, Liang, and Yuqi Cai. "A Review of Fault Diagnosis Research on On-Load Tap-Changers." E3S Web of Conferences 155 (2020): 01016. http://dx.doi.org/10.1051/e3sconf/202015501016.

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As the core component of transformer voltage regulation, on-load tap changer plays an important role in ensuring voltage stability of power system. With the increase of times of voltage regulation, the failure rate also increases correspondingly. In view of the common faults of on-load tap changer, this paper introduces several existing fault diagnosis methods and summarizes their advantages and disadvantages. Finally, the problems in fault diagnosis of on-load tap-changer and the future research focus are analysed.

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Al-Ameri, Salem Mgammal, Abdulaziz Almutairi, Muhammad Saufi Kamarudin, et al. "Application of Frequency Response Analysis Technique to Detect Transformer Tap Changer Faults." Applied Sciences 11, no. 7 (2021): 3128. http://dx.doi.org/10.3390/app11073128.

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Power transformers are located in the electrical transmission and distribution networks where different voltage levels are needed. The turn ratio of the low voltage and high voltage windings is mechanically controlled by an on-load tap changer or de-energized tap changer. As the tap changer is the transformer’s only moving part, it is highly susceptible to mechanical failure and aging degradation. While some diagnostic tools have been used to determine the mechanical condition of tap changer contacts, not much attention was given to use the frequency response analysis to diagnose the transform

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Lim, Sung-Hun, Jin-O. Kim, and Youngjin Jeong. "Fault Current Limiting and Breaking Characteristics of SFCLB Using Flux Coupling with Tap Changer." Energies 13, no. 19 (2020): 5138. http://dx.doi.org/10.3390/en13195138.

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In this paper, a superconducting fault current limiting breaker (SFCLB) using flux coupling with a tap changer is suggested and its effective fault current limiting and breaking characteristics due to the winding method using its tap changer are analyzed. The suggested SFCLB using flux coupling, which consists of the SFCLB using flux coupling with a tap changer, mechanical switch and driving coil, can perform the circuit-breaking function without external driving power after the fault current limiting operation. To examine the suggested SFCLB’s operation, the small scale SFCLB using flux coupl

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Gao, Shuguo, Cong Zhou, Zhigang Zhang, et al. "Mechanical Fault Diagnosis of an On-Load Tap Changer by Applying Cuckoo Search Algorithm-Based Fuzzy Weighted Least Squares Support Vector Machine." Mathematical Problems in Engineering 2020 (May 7, 2020): 1–11. http://dx.doi.org/10.1155/2020/3432409.

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To improve adaptability, feature resolution, and identification accuracy when diagnosing mechanical faults in an on-load tap changer (OLTC) of a transformer, in the present research, wavelet packet energy entropy is used to describe the information comprising vibration signal in the switch process of an OLTC, and a fuzzy weighted least squares support vector machine (CSA-fuzzy weighted LSSVM) model based on the cuckoo search algorithm is proposed to identify mechanical fault types. Specifically, according to the different importance of the sample data in different periods, the idea of fuzzy we

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S., Al-Ameri, A. Alawady A., F. M. Yousof M., Ahmad H., A. Salem Ali., and A. Talib M. "Frequency response analysis for transformer tap changer damage detection." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 1 (2020): 350–58. https://doi.org/10.11591/ijpeds.v11.i1.pp350-358.

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Frequency response analysis (FRA) method has been proven to detect the transformer winding damage. However, there is no practical study which investigates the damages on transformer tap changer even though it has a high failure rate. Hence, this paper investigates normal and faulty transformer tap changer using FRA. The FRA measurements conducted using four different test configurations. Also, normal tap changer, pitting and coking tap changer contact were investigated. In addition to FRA measurement, winding resistance measurement has been conducted. The transformer turn ratio measurement als

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Shang, Rongyan, Changqing Peng, and Ruiming Fang. "A Segmented Preprocessing Method for the Vibration Signal of an On-Load Tap Changer." Electronics 10, no. 2 (2021): 131. http://dx.doi.org/10.3390/electronics10020131.

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The vibration signal of an on-load tap changer (OLTC) consists of a series of sharp vibration bursts, and its fault feature in certain periods is easily missed. This study considered that preprocessing the vibration signal of the OLTC in segments could effectively solve the aforementioned problem. First, the collection of the signal is discussed, the waveform characteristics of the vibration signal when the OLTC was in normal action was described, and the selection of the signal was analyzed. Second, the time domain characteristics and frequency spectrum analyses were carried out to demonstrat

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Shang, Rongyan, Changqing Peng, and Ruiming Fang. "A Segmented Preprocessing Method for the Vibration Signal of an On-Load Tap Changer." Electronics 10, no. 2 (2021): 131. http://dx.doi.org/10.3390/electronics10020131.

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The vibration signal of an on-load tap changer (OLTC) consists of a series of sharp vibration bursts, and its fault feature in certain periods is easily missed. This study considered that preprocessing the vibration signal of the OLTC in segments could effectively solve the aforementioned problem. First, the collection of the signal is discussed, the waveform characteristics of the vibration signal when the OLTC was in normal action was described, and the selection of the signal was analyzed. Second, the time domain characteristics and frequency spectrum analyses were carried out to demonstrat

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Ming, Cui, Hong-wei Zhou, Tian Dong, and Fu Liu. "Fault Diagnosis to On-load Tap Changer Using MRBR." International Journal of Signal Processing, Image Processing and Pattern Recognition 8, no. 10 (2015): 311–20. http://dx.doi.org/10.14257/ijsip.2015.8.10.31.

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Shi, Yanhui, Yanjun Ruan, Liangchuang Li, et al. "A Mechanical Fault Diagnosis Method for UCG-Type On-Load Tap Changers in Converter Transformers Based on Multi-Feature Fusion." Actuators 13, no. 10 (2024): 387. http://dx.doi.org/10.3390/act13100387.

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The On-Load Tap Changer (OLTC) is the only movable mechanical component in a converter transformer. To ensure the reliable operation of the OLTC and to promptly detect mechanical faults in OLTCs to prevent them from developing into electrical faults, this paper proposes a fault diagnosis method for OLTCs based on a combination of Particle Swarm Optimization (PSO) algorithm and Least Squares Support Vector Machine (LSSVM) with multi-feature fusion. Firstly, a multi-feature extraction method based on time/frequency domain statistics, synchrosqueezed wavelet transform, singular value decompositio

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Yan, Yan, Yong Qian, Hongzhong Ma, and Changwu Hu. "Research on imbalanced data fault diagnosis of on-load tap changers based on IGWO-WELM." Mathematical Biosciences and Engineering 20, no. 3 (2023): 4877–95. http://dx.doi.org/10.3934/mbe.2023226.

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<abstract> <p>Aiming at the problem of on-load tap changer (OLTC) fault diagnosis under imbalanced data conditions (the number of fault states is far less than that of normal data), this paper proposes an OLTC fault diagnosis method based on an Improved Grey Wolf algorithm (IGWO) and Weighted Extreme Learning Machine (WELM) optimization. Firstly, the proposed method assigns different weights to each sample ac-cording to WELM, and measures the classification ability of WELM based on G-mean, so as to realize the modeling of imbalanced data. Secondly, the method uses IGWO to optimize

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Dissertations / Theses on the topic "Tap changer fault"

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Kang, Pengju. "On-line condition assessment of power transformer on-load tap-changers : transient vibration analysis using wavelet transform and self organising map." Thesis, Queensland University of Technology, 2000.

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Παππά, Αγγελική. "Μελέτη σφαλμάτων σε μετασχηματιστές υψηλής τάσης με αυτόματο μεταγωγέα τάσης (TAP changer)". Thesis, 2010. http://nemertes.lis.upatras.gr/jspui/handle/10889/4085.

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Στην παρούσα διπλωματική εργασία γίνεται αναλυτική περιγραφή της λειτουργίας της διάταξης του Μεταγωγέα Τάσης Υπό Φορτίο ενός μετασχηματιστή υψηλής τάσης 150 kV/ 21 kV. Επίσης, περιγράφονται και αναλύονται σφάλματα που εμφανίζονται σε μετασχηματιστές με Μεταγωγέα Τάσης Υπό Φορτίο με χρήση εμπειρικών δεδομένων από την εταιρεία Δ.Ε.Η. Α.Ε. και τη θεωρητική ανάλυση και εξήγησή τους μέσα από βιβλιογραφική μελέτη . Συγκεκριμένα, περιγράφονται τα αίτια που δημιουργούν αυτά τα σφάλματα, τα συμπτώματα που εμφανίζονται στο μετασχηματιστή και το μεταγωγέα τάσης , οι επιπτώσεις των σφαλμάτων αυτών στο μ

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Books on the topic "Tap changer fault"

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Smithers, Andrew. Productivity and the Bonus Culture. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198836117.001.0001.

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Living standards in the UK and the US are in danger of falling. In the past change has brought disruption with the offsetting reward of higher living standards from growth. Today we have disruption without reward. The resulting voter dissatisfaction encourages populist policies which threaten even worse outcomes. The decline in growth has weakened the standing of liberal democracy both at home and internationally. The decline is entirely due to poor productivity combined with an unfavourable change in demography. The UK and the US have changed from having a demographic surplus in which the wor

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Book chapters on the topic "Tap changer fault"

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Manoj, Teruvai, Chilaka Ranga, Mulpuru Gopi, and Nasir Ul Islam Wani. "A Fuzzy-Based Fault Diagnostic Model for Oil-Immersed Load Tap Changers." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2024. https://doi.org/10.1007/978-981-97-5227-0_21.

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Xia, Mao, Siqi Li, Yichao Huang, Kaiwen Yuan, and Sizhao Lu. "A Fault Diagnosis Method for On-Load Tap Changers Based on MFT and DBCNN-KNN." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-1379-3_30.

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Huang, Yichao, Mao Xia, Kaiwen Yuan, Zhe Liu, Siqi Li, and Sizhao Lu. "Fault Diagnosis of On-Load Tap Changers Based on Multi-Sensor Fusion and Deep Residual Networks." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-1383-0_23.

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Huang, Jianyang, Bolan Lai, Zilin Guan, Shihao Fan, and Weiwang Wang. "Diagnosis of Mechanical Faults in On-Load Tap Changers of Power Transformer by Using the Integrated Neural Network." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2024. https://doi.org/10.1007/978-981-97-8812-5_39.

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Li, Shiyi. "Analysis of On-Load Tap-Changer Failures Based on Lightning Overvoltage." In Frontiers in Artificial Intelligence and Applications. IOS Press, 2024. https://doi.org/10.3233/faia241330.

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Transformer faults have now become a major cause of power system failures, with transformers being more susceptible to malfunctions in adverse weather conditions. This article takes the example of a fault in the on-load tap changer switch of a transformer caused by a localized overvoltage short circuit during severe thunderstorm weather. The author elaborates on three types of lightning-induced overvoltage, combining fault analysis with extensive on-site experimental data and comparisons with standard values to convincingly identify the fault causes. The article briefly discusses five types of

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Yan, Yan, and Hongzhong Ma. "A Novel OLTC Fault Diagnosis Method Based on Optimized Long Short-Term Memory Parameters." In Proceedings of CECNet 2021. IOS Press, 2021. http://dx.doi.org/10.3233/faia210458.

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Recently, long short-term memory (LSTM) networks have been widely adopted to help with fault diagnosis for power systems. However, the parameters of LSTM networks are determined by prior knowledge and experience and thereby not capable of dealing with unexpected faults in volatile environments. In this paper, we propose and apply an improved grey wolf optimization (IGWO) algorithm to optimize the parameters of LSTM networks, aiming to circumvent the drawback of empirical LSTM parameters and enhance the fault diagnosis accuracy for on-load tap changers (OLTCs). The composite multiscale weighted

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Qiu, Kun-Feng, Richard J. Goldfarb, Jun Deng, et al. "Chapter 35: Gold Deposits of the Jiaodong Peninsula, Eastern China." In Geology of the World’s Major Gold Deposits and Provinces. Society of Economic Geologists, 2020. http://dx.doi.org/10.5382/sp.23.35.

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Abstract The Jiaodong gold province, within the eastern margin of the North China block and the translated northeastern edge of the South China block, has a stated premining gold resource exceeding 4,500 metric tons (t). It is thus one of the world’s largest gold provinces, with a present cumulative annual production estimated at 60 t Au. More than 90% of the Jiaodong gold resource is hosted by batholiths and related bodies of the Linglong (ca. 160–145 Ma) and, to a lesser degree, Guojialing (ca. 130–122 Ma) suites. The intrusions were emplaced into high-grade metamorphic basement rocks of the

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Cohen Ronald A., Gongvatana Assawin, and Ott Brian R. "Cerebrospinal Fluid Biomarkers of Neurodegenerative and Ventricular Changes in the Elderly." In Advances in Alzheimer’s Disease. IOS Press, 2011. https://doi.org/10.3233/978-1-60750-793-2-31.

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Ventricular enlargement is a common finding among patients with Alzheimer's disease (AD), and has recently been shown to occur from an early disease stage. A possible pathophysiological link between ventricular enlargement and AD has been suggested, with faulty cerebrospinal fluid (CSF) clearance implicated as one possible mechanism. We examined whether ventricular enlargement is associated with CSF amyloid beta (A&beta;) early in the disease, even before cognitive symptoms are present, as one would expect to observe this relationship if CSF clearance is impaired. Baseline CSF biomarker da

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Kessler-Harris, Alice. "Questions of Equity." In In Pursuit of Equity. Oxford University PressNew York, NY, 2001. http://dx.doi.org/10.1093/oso/9780195038354.003.0004.

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Abstract In the spring of 2000, the Republican congressional leadership proposed, and Congress unanimously passed, a revision of the nation’s Social Security code that lifted restrictions on earnings for people under the age of seventy. The new law allowed every contributor over the age of sixty-five to receive a full old age pension regardless of whether he or she continued to earn wages. Exuberant praise and congratulatory public comments greeted this expansion of benefits in one of the country’s most beloved social programs. This, said the New York Times, “is one of those exceptional govern

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Samuel, Delyth, and Danny Samson. "Government Insurer Enters the Brave New World." In IT Outsourcing. IGI Global, 2010. http://dx.doi.org/10.4018/978-1-60566-770-6.ch085.

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Governments provide a wide range of services, and the digital economy provides both threats and opportunities in this sector. The Transport Accident Commission (TAC) is a compulsory, government owned and operated insurance scheme for third-party, no-fault liability insurance for transport accident victims, operated in Victoria, Australia. E-business has now been widely used in all sectors from small business (Loane, McNaughton, & Bell, 2004) to emerging economies (Li & Chang, 2004), and in very different industry sectors (Cagno, Di Giulio, & Trucco, 2004; Golden, Hughes, & Gall

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Conference papers on the topic "Tap changer fault"

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Ji, Gongrui, Minxiang Yang, Huilan Yang, Chaofei Gao, Shainan Zhang, and Wei Wang. "Fault detection of on-load tap changer based on improved transformer." In Ninth International Symposium on Advances in Electrical, Electronics, and Computer Engineering (ISAEECE 2024), edited by Pierluigi Siano and Wenbing Zhao. SPIE, 2024. http://dx.doi.org/10.1117/12.3034185.

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Xu, Zhiqi, Sijiang Zhang, Yanwen Xu, Dexiang Yang, Zhanhai Zhang, and Hongyu Li. "Cluster Analysis for Transformer On-load Tap Changer Contacts Fault Identification." In 2024 IEEE 5th International Conference on Advanced Electrical and Energy Systems (AEES). IEEE, 2024. https://doi.org/10.1109/aees63781.2024.10872432.

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Chen, Liangyuan, Lei Zhang, Yuan Ma, and Shaoming Pan. "Analysis Method of the Interstage Short Circuit Fault in the On-Load Tap Changer." In 2025 4th International Conference on Green Energy and Power Systems (ICGEPS). IEEE, 2025. https://doi.org/10.1109/icgeps65133.2025.11034543.

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Zhang, Sijiang, Zhiqi Xu, Zhanhai Zhang, Yanwen Xu, Dexiang Yang, and Pengzhen Wu. "Fault Condition Assessment of Transformer On-load Tap-changer Contacts Based on Joint Electromechanical Diagnosis." In 2024 IEEE 5th International Conference on Advanced Electrical and Energy Systems (AEES). IEEE, 2024. https://doi.org/10.1109/aees63781.2024.10872464.

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He, Junda, Bingxin Chen, Yajie Zhang, and Zhaoyi Liao. "Diode Envelope Extraction and Fault Diagnosis of On-Load Tap-Changer Vibration Signals in Converter Transformers." In 2025 5th International Conference on Sensors and Information Technology (ICSI). IEEE, 2025. https://doi.org/10.1109/icsi64877.2025.11009894.

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Chen, Bingxin, Weikai Zhang, Junda He, Zhaoyi Liao, and Lirong Liu. "Fault Simulation and Detection of Oil-Immersed On-Load Tap Changer Based on Dual Cantilever Beam Fiber Bragg Grating Vibration Sensor." In 2025 5th International Conference on Sensors and Information Technology (ICSI). IEEE, 2025. https://doi.org/10.1109/icsi64877.2025.11009333.

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Wang, Yu-Po, Meng-Yuan Lee, and Kun-Long Chen. "Fault Diagnosis for Oil-Immersed Power Transformers and On-Load Tap Changers Using Ensemble Learning." In 2025 15th International Conference on Power, Energy, and Electrical Engineering (CPEEE). IEEE, 2025. https://doi.org/10.1109/cpeee64598.2025.10987542.

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Zhou, Yuxiao, Yanan Wang, Haichuan Yu, et al. "Identification of On-load Tap Changer Contact Wear Faults Based on Neural Network Response Surface Model." In 2024 International Conference on Advances in Electrical Engineering and Computer Applications (AEECA). IEEE, 2024. https://doi.org/10.1109/aeeca62331.2024.00033.

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Ding, Xianghao, Kun Geng, Guopeng Dong, and Tainian Wang. "Typical Mechanical Fault Diagnosis of On-load Tap-changers Based on VMD-Hilbert Transform and 1D-CNN-SVM." In 2024 4th International Conference on Electrical Engineering and Control Science (IC2ECS). IEEE, 2024. https://doi.org/10.1109/ic2ecs64405.2024.10928547.

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Peng, Bohao, Zhijuan Wang, Runze Qi, and Binbin Wei. "The Fault Diagnosis Method of On-Load Tap Changers Based on Phase Space Tensor Decomposition and Deep Learning Models." In 2024 4th International Conference on Electrical Engineering and Control Science (IC2ECS). IEEE, 2024. https://doi.org/10.1109/ic2ecs64405.2024.10928551.

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Reports on the topic "Tap changer fault"

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Onuoha, Chukwuma Candidus, and Shamus McDonnell. PR-388-143604-R01 Identifying Coating Faults and Severity Through Electrolyte Resistivity Measurement. Pipeline Research Council International, Inc. (PRCI), 2018. http://dx.doi.org/10.55274/r0011481.

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Soil resistivity is one of the most important variables that is used to ascertain the corrosivity of an electrolyte around a pipe. This is crucial information that enhances the classification, prioritization and selection of locations prone to external corrosion during External Corrosion Direct Assessment (ECDA) or pipeline integrity assessment when combined with results from cathodic protection and coating surveys. The Wenner Four-Pin method is commonly used in the industry for soil resistivity measurements. It entails perpendicular measurements with four equidistant pins away from the pipe t

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