Models for thermal and mechanical monitoring of power transformers:
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis Book |
| Language: | English |
| Published: |
Aachen
Shaker
2011
|
| Series: | Schriftenreihe des Instituts für Energieübertragung und Hochspannungstechnik
5 |
| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Physical Description: | VII, 141 S. Ill., graph. Darst. |
| ISBN: | 9783844004656 |
Staff View
MARC
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Record in the Search Index
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| adam_text | IMAGE 1
TABLE OF CONTENTS
ABSTRACT I
ZUSAMMENFASSUNG ILL
1 INTRODUCTION 1
1.1 BACKGROUND AND MOTIVATION 1
1.2 AIM OF THE WORK 3
1.3 OUTLINE OF THE THESIS 4
2 MONITORING AND DIAGNOSIS OF POWER TRANSFORMERS 6
2.1 FAILURES IN POWER TRANSFORMERS 6
2.2 MONITORING AND DIAGNOSIS 8
2.3 ONLINE MONITORING TECHNIQUES 10
2.3.1 LOAD AND OPERATING CONDITIONS 10
2.3.2 THERMAL PERFORMANCE 11
2.3.3 INSULATING OIL 11
2.3.4 PARTIAL DISCHARGE MEASUREMENT 12
2.3.5 HV BUSHING MONITORING 13
3 THERMAL BEHAVIOR OF POWER TRANSFORMERS 15
3.1 HOT-SPOT TEMPERATURE 16
3.2 TRANSFORMER LOSSES 17
3.3 TRANSFORMER COOLING SYSTEMS 19
4 TOP-OIL TEMPERATURE PREDICTION BASED ON PHYSICAL MODELS 20
4.1 STATE OF THE ART 20
4.2 TOP-OIL TEMPERATURE PHYSICAL MODELS 22
4.2.1 IEEE STD. C57.91 TOP-OIL TEMPERATURE RISE MODEL 22
4.2.2 SEMI-PHYSICAL MODEL 24
4.2.3 IEC60354 STEADY-STATE TEMPERATURE EQUATIONS 25
BIBLIOGRAFISCHE INFORMATIONEN HTTP://D-NB.INFO/1017145377
DIGITALISIERT DURCH
IMAGE 2
4.2.4 ONE-BODY MODEL 26
4.3 TOP-OIL TEMPERATURE MODELS INVESTIGATION 28
4.3.1 PARAMETER ESTIMATION 28
4.3.2 SOFTWARE DEVELOPMENT 29
4.3.3 INVESTIGATED TRANSFORMER CHARACTERISTICS 31
4.3.4 REQUIRED INPUT DATA 32
4.4 APPLICATION OF PHYSICAL THERMAL MODELS 33
4.4.1 RESULTS OF PARAMETER ESTIMATION 34
4.4.2 INFLUENCE OF STARTING VALUES IN PARAMETER ESTIMATION 35
4.4.3 VARIATION OF TOP-OIL TIME CONSTANT VALUES 36
4.4.4 PERFORMANCE OF DIFFERENT TOP-OIL TEMPERATURE MODELS 36
4.4.5 CONCLUSION 45
5 TOP-OIL TEMPERATURE PREDICTION BASED ON NEURAL NETWORKS 48
5.1 STATE OF THE ART 48
5.2 INTRODUCTION TO NEURAL NETWORKS 49
5.2.1 BIOLOGICAL NEURONS 49
5.2.2 STRUCTURE OF ARTIFICIAL NEURAL NETWORKS 50
5.3 TRAINING ALGORITHMS 52
5.3.1 LEVENBERG-MARQUARDTBACKPROPAGATION 53
5.3.2 SCALED CONJUGATE GRADIENT BACKPROPAGATION 54
5.3.3 AUTOMATED BAYESIAN REGULARIZATION 54
5.4 NEURAL NETWORK TOPOLOGIES 55
5.4.1 FEED-FORWARD NEURAL NETWORK 55
5.4.2 RECURRENT NEURAL NETWORK 55
5.5 HISTORY OF ARTIFICIAL NEURAL NETWORKS 56
5.6 TOP-OIL TEMPERATURE PREDICTION WITH NEURAL NETWORKS 57
5.6.1 SOFTWARE DEVELOPMENT 58
5.6.2 MATHEMATICAL MODELS 59
IMAGE 3
5.7 CALCULATION RESULTS AND DISCUSSION 64
5.7.1 TRAINING TIME 64
5.7.2 LEARNING ALGORITHMS AND NUMBER OF NEURONS 64
5.7.3 NUMBER OF HIDDEN LAYERS 68
5.7.4 PERFORMANCE OF ELMAN RECURRENT NEURAL NETWORK 69
6 APPLICATION OF TOP-OIL TEMPERATURE PREDICTION 72
6.1 PERFORMANCE COMPARISON BETWEEN THE PHYSICAL AND THE NEURAL
NETWORK TOP-OIL MODELS 72
6.2 RELIABILITY OF THE MODEL FOR DIFFERENT LOADING CONDITIONS 77
6.3 EFFECT OF TRANSIENT-STATE OF AMBIENT TEMPERATURE 79
6.4 DETECTION OF MALFUNCTION OF FANS 80
6.4.1 PREDICTION OF NUMBER OF OPERATING FANS 80
6.4.2 CORRELATING THE CALCULATED AND THE MEASURED TOP-OIL TEMPERATURE
...82
6.4.3 ONLINE MONITORING CRITERIA 85
6.5 IMPLEMENTATION OF A NEURAL NETWORK MODEL IN THE TOP-OIL
TEMPERATURE MONITORING SYSTEM 87
7 MONITORING AND DIAGNOSIS OF ON-LOAD TAP CHANGERS 88
7.1 TAP CHANGERS CHARACTERISTICS 88
7.1.1 TAP CHANGERS DESIGN SCHEMES 88
7.1.2 SWITCHING PRINCIPLES 89
7.1.3 MOTOR DRIVE MECHANISMS 92
7.2 FAILURE MECHANISMS IN ON-LOAD TAP CHANGERS 92
7.3 MAINTENANCE STRATEGY 93
7.4 ONLINE MONITORING PARAMETERS 94
7.4.1 CONTACT RESISTANCE OF DIVERTER SWITCH 94
7.4.2 DRIVE TORQUE MEASUREMENT 95
7.4.3 SELECTOR SWITCH MONITORING 97
IMAGE 4
7.4.4 TEMPERATURE DIFFERENCE BETWEEN THE MAIN TANK AND LOAD TAP CHANGER
COMPARTMENT 97
7.4.5 DISSOLVED GAS ANALYSIS 98
8 ONLINE MONITORING OF TAP CHANGERS WITH VIBRATION TECHNIQUE.... 99
8.1 STATE OF THE ART 99
8.2 TRANSITION SEQUENCE INVESTIGATION 100
8.3 SIMULATION OF DEFECTS IN LABORATORY 105
8.4 ON-SITE INVESTIGATION 108
8.4.1 MEASURING SYSTEM 108
8.4.2 INVESTIGATED TAP CHANGER 112
8.4.3 RESULTS OF THE MEASUREMENT 113
8.5 ONLINE MONITORING CRITERIA 116
8.6 IMPLEMENTATION OF THE TAP CHANGER ACOUSTIC MONITORING SYSTEMLL7
9 CONCLUSION AND PERSPECTIVE 119
10 SYMBOLS AND ABBREVIATIONS 123
10.1 SYMBOLS 123
10.2 ABBREVIATIONS 124
11 APPENDIX 125
11.1 DEVIATION OF DIFFERENTIAL EQUATION (3.1] 125
11.2 DEVIATION OF DIFFERENTIAL EQUATION (4.1) 127
11.3 TRAINING ALGORITHM IN MATLAB NEURAL NETWORK TOOLBOX 128
11.4 CHARACTERISTIC TIME MEASURING MODULE 129
11.5 CIRCUIT DIAGRAM OF THE CHARACTERISTIC TIME MEASURING MODULE.... 132
12 BIBLIOGRAPHY 133
|
| any_adam_object | 1 |
| author | Vilaithong, Rummiya |
| author_GND | (DE-588)101753523X |
| author_facet | Vilaithong, Rummiya |
| author_role | aut |
| author_sort | Vilaithong, Rummiya |
| author_variant | r v rv |
| building | Verbundindex |
| bvnumber | BV039930433 |
| classification_rvk | ZN 8330 |
| ctrlnum | (OCoLC)767960165 (DE-599)DNB1017145377 |
| dewey-full | 621.3140287 |
| dewey-hundreds | 600 - Technology (Applied sciences) |
| dewey-ones | 621 - Applied physics |
| dewey-raw | 621.3140287 |
| dewey-search | 621.3140287 |
| dewey-sort | 3621.3140287 |
| dewey-tens | 620 - Engineering and allied operations |
| discipline | Elektrotechnik / Elektronik / Nachrichtentechnik |
| format | Thesis Book |
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| id | DE-604.BV039930433 |
| illustrated | Illustrated |
| indexdate | 2024-07-10T00:14:23Z |
| institution | BVB |
| isbn | 9783844004656 |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-024788707 |
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| physical | VII, 141 S. Ill., graph. Darst. |
| publishDate | 2011 |
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| publisher | Shaker |
| record_format | marc |
| series | Schriftenreihe des Instituts für Energieübertragung und Hochspannungstechnik |
| series2 | Schriftenreihe des Instituts für Energieübertragung und Hochspannungstechnik Berichte aus der Energietechnik |
| spelling | Vilaithong, Rummiya Verfasser (DE-588)101753523X aut Models for thermal and mechanical monitoring of power transformers Rummiya Vilaithong Aachen Shaker 2011 VII, 141 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Schriftenreihe des Instituts für Energieübertragung und Hochspannungstechnik 5 Berichte aus der Energietechnik Zugl.: Stuttgart, Univ., Diss., 2011 Online-Messung (DE-588)4352889-2 gnd rswk-swf Zustandsüberwachung (DE-588)4369492-5 gnd rswk-swf Leistungstransformator (DE-588)4167309-8 gnd rswk-swf Mechanische Schwingung (DE-588)4138305-9 gnd rswk-swf Fehlererkennung (DE-588)4133764-5 gnd rswk-swf Temperaturmessung (DE-588)4133187-4 gnd rswk-swf Stufenschalter (DE-588)4630588-9 gnd rswk-swf Neuronales Netz (DE-588)4226127-2 gnd rswk-swf Schaltvorgang (DE-588)4179394-8 gnd rswk-swf Transformatorenöl (DE-588)4346630-8 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Leistungstransformator (DE-588)4167309-8 s Fehlererkennung (DE-588)4133764-5 s Zustandsüberwachung (DE-588)4369492-5 s Online-Messung (DE-588)4352889-2 s Transformatorenöl (DE-588)4346630-8 s Temperaturmessung (DE-588)4133187-4 s Neuronales Netz (DE-588)4226127-2 s Stufenschalter (DE-588)4630588-9 s Mechanische Schwingung (DE-588)4138305-9 s Schaltvorgang (DE-588)4179394-8 s DE-604 Schriftenreihe des Instituts für Energieübertragung und Hochspannungstechnik 5 (DE-604)BV036748531 5 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=024788707&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Vilaithong, Rummiya Models for thermal and mechanical monitoring of power transformers Schriftenreihe des Instituts für Energieübertragung und Hochspannungstechnik Online-Messung (DE-588)4352889-2 gnd Zustandsüberwachung (DE-588)4369492-5 gnd Leistungstransformator (DE-588)4167309-8 gnd Mechanische Schwingung (DE-588)4138305-9 gnd Fehlererkennung (DE-588)4133764-5 gnd Temperaturmessung (DE-588)4133187-4 gnd Stufenschalter (DE-588)4630588-9 gnd Neuronales Netz (DE-588)4226127-2 gnd Schaltvorgang (DE-588)4179394-8 gnd Transformatorenöl (DE-588)4346630-8 gnd |
| subject_GND | (DE-588)4352889-2 (DE-588)4369492-5 (DE-588)4167309-8 (DE-588)4138305-9 (DE-588)4133764-5 (DE-588)4133187-4 (DE-588)4630588-9 (DE-588)4226127-2 (DE-588)4179394-8 (DE-588)4346630-8 (DE-588)4113937-9 |
| title | Models for thermal and mechanical monitoring of power transformers |
| title_auth | Models for thermal and mechanical monitoring of power transformers |
| title_exact_search | Models for thermal and mechanical monitoring of power transformers |
| title_full | Models for thermal and mechanical monitoring of power transformers Rummiya Vilaithong |
| title_fullStr | Models for thermal and mechanical monitoring of power transformers Rummiya Vilaithong |
| title_full_unstemmed | Models for thermal and mechanical monitoring of power transformers Rummiya Vilaithong |
| title_short | Models for thermal and mechanical monitoring of power transformers |
| title_sort | models for thermal and mechanical monitoring of power transformers |
| topic | Online-Messung (DE-588)4352889-2 gnd Zustandsüberwachung (DE-588)4369492-5 gnd Leistungstransformator (DE-588)4167309-8 gnd Mechanische Schwingung (DE-588)4138305-9 gnd Fehlererkennung (DE-588)4133764-5 gnd Temperaturmessung (DE-588)4133187-4 gnd Stufenschalter (DE-588)4630588-9 gnd Neuronales Netz (DE-588)4226127-2 gnd Schaltvorgang (DE-588)4179394-8 gnd Transformatorenöl (DE-588)4346630-8 gnd |
| topic_facet | Online-Messung Zustandsüberwachung Leistungstransformator Mechanische Schwingung Fehlererkennung Temperaturmessung Stufenschalter Neuronales Netz Schaltvorgang Transformatorenöl Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=024788707&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV036748531 |
| work_keys_str_mv | AT vilaithongrummiya modelsforthermalandmechanicalmonitoringofpowertransformers |