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## Power transformer monitoring system

### Paweł Kopański

#### Abstract

The submitted PhD dissertation paper contains a description of an implemented system for monitoring substations UHV transformers of national power system. Monitoring systems are installed directly on the transformers and are designed to collect as much data information as possible in order to carry out a full transformer diagnosis and to present the results. Data collection and processing is performer as follows: first a data aggregation is done by bringing the signals from sensors installed on the transformer to the central controller equipped with an input card. The obtained data are then stored and archived in databases. On the basis of the saved data internal algorithms are eventually run in order to carry out an analysis of the measured values and set the relevant information about the transformer condition. Such systems allow to control the transformer operation in real-time. Any damage to the cooling system, tap changer or liquid insulation are continuously diagnosed. The first two chapters constitute a brief introduction of the dissertation subject. Section 3 describes the construction and characteristics of the UHV transformers. The chapter is an introduction to the entire dissertation, bringing a few basics on transformers and phenomena occurring therein. In Chapter 4, transformer damage causes are characterized and methods of diagnosis of their condition are given. Chapter 5 and 6 contain information about the measurement and protection systems installed on the transformer, used as the first element of the transformer monitoring system. Chapter 7 describes the main results of the study. This chapter contains the presentation of the developed system with a detailed description of their construction and worked out algorithms for retrieving and storing transformer data. In addition to the description of the design of monitoring systems, results of the laboratory tests have been included in the chapter. The conducted analysis were aimed to show all advantages and drawbacks of the designed system. On this basis, it was decided which system can eventually be implemented in power substations.
Record ID
WUTe305d1aaf6da4d4db149ffe3306a393b
Diploma type
Doctor of Philosophy
Author
Paweł Kopański Paweł Kopański,, The Institute of Electrical Power Engineering (FoEE/IEPE)Faculty of Electrical Engineering (FoEE)
Title in Polish
Monitoring pracy transformatorów najwyższych mocy
Title in English
Power transformer monitoring system
Language
(pl) Polish
Certifying Unit
Faculty of Electrical Engineering (FoEE)
Discipline
electronic engineering / (technology domain) / (technological sciences)
Status
Finished
Start date
28-03-2012
Defense Date
30-04-2014
Title date
21-05-2014
Supervisor
Internal reviewers
External reviewers
Rosołowski Eugeniusz Rosołowski Eugeniusz,, External affiliation of publication: Wroclaw University of Science and Technology
Pages
165
Keywords in English
power transformer
Abstract in English
The submitted PhD dissertation paper contains a description of an implemented system for monitoring substations UHV transformers of national power system. Monitoring systems are installed directly on the transformers and are designed to collect as much data information as possible in order to carry out a full transformer diagnosis and to present the results. Data collection and processing is performer as follows: first a data aggregation is done by bringing the signals from sensors installed on the transformer to the central controller equipped with an input card. The obtained data are then stored and archived in databases. On the basis of the saved data internal algorithms are eventually run in order to carry out an analysis of the measured values and set the relevant information about the transformer condition. Such systems allow to control the transformer operation in real-time. Any damage to the cooling system, tap changer or liquid insulation are continuously diagnosed. The first two chapters constitute a brief introduction of the dissertation subject. Section 3 describes the construction and characteristics of the UHV transformers. The chapter is an introduction to the entire dissertation, bringing a few basics on transformers and phenomena occurring therein. In Chapter 4, transformer damage causes are characterized and methods of diagnosis of their condition are given. Chapter 5 and 6 contain information about the measurement and protection systems installed on the transformer, used as the first element of the transformer monitoring system. Chapter 7 describes the main results of the study. This chapter contains the presentation of the developed system with a detailed description of their construction and worked out algorithms for retrieving and storing transformer data. In addition to the description of the design of monitoring systems, results of the laboratory tests have been included in the chapter. The conducted analysis were aimed to show all advantages and drawbacks of the designed system. On this basis, it was decided which system can eventually be implemented in power substations.
PKT classification
430000
KBN classification
34
Thesis file
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Uniform Resource Identifier
https://repo.pw.edu.pl/info/phd/WUTe305d1aaf6da4d4db149ffe3306a393b/
URN
urn:pw-repo:WUTe305d1aaf6da4d4db149ffe3306a393b

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