Szymon Żurek, Patryk Kubicki
Using the regulation of transformers to improve the operational safety of the power system
The power system requires constant supervision and regulatory actions that enable uninterrupted supply of electricity to consumers with standardized parameters. In the current working conditions, the existing regulatory measures applied in the PPS turn out to be insufficient, which makes it necessary to search for new and effective methods of regulation. One possibility is to use special regulating transformers to control active power flows and to maintain voltage levels in the network buses. The article presents the use of regulating transformers in an operator activities.
Keywords: power system, control transformer, voltage regulation, power flow
Grzegorz Matusiak, Robert Nader, Jerzy Nowikow, Andrzej Łasica
Protection against an electric arc effects – constructional improvements and testing of helmet prototypes fitted with face shields
The article presents the development process of the construction of an electrically insulating safety helmet with a face shield designed to protect against thermal effect of an electric arc. As part of the work, the helmet's operating temperature range was extended, increased was the resistance to mechanical impacts and added were the side face shields.
Keywords: live working, health and safety, electrically insulating safety helmet
The possibilities of hydrogen combustion in gas turbines
Hydrogen will play an increasingly important role in the processes of energy production, conversion and storage. The paper discusses the current technologies for burning hydrogen in gas turbines. As regards physicochemical properties, hydrogen differs from natural gas, which has a significant impact on the course and organization of the combustion process. That’s a challenge currently faced by gas turbine manufacturers. The paper also reviews possible modes of hydrogen combustion in turbines (as at the end of the last decade) and presents plans for the near future.
Keywords: hydrogen, gas turbines, combustion, hydrogen combustion, hydrogen in power generation
Elżbieta Boehme, Michał Mrozek
Technical condition assessment of ion exchange resins in terms of proper operation of the water demineralization station
Boilers and turbines remain priority devices not only in utility power plants but also in the power sector. Water demineralization stations are quite often omitted when distributing the company funds dedicated to the control of equipment operation, and thus also technical evaluation of ion exchangers. This tendency is particularly noticeable in the case of operators of installations of older types operating in low efficiency co-current systems. It sometimes happens that they are not fully aware of the consequences of poor condition of ion exchange resins and their impact on the increase in operating costs. Therefore, a number of irregularities could be avoided by checking the technical condition of ion exchangers in terms of their further suitability.
Keywords: ion exchange resins, water demineralization station, laboratory testing, technical condition assessment, operation of ion exchangers
Krystian Leonard Chrzan
Breaking of composite insulators
The most dangerous mechanical damage to insulators is the fracture of post insulators and the rupture of dead-end insulators or suspension insulators. The glass-fiber core is an element that provides composite insulators with high tensile strength. After 1998, a new type of damage was detected in various countries, called decay-like fracture. Damage to the silicone sheath of the composite insulator as well as degradation of the glass fiber core can be long-term processes. The process of damage to the sheath of composite insulators was observed at the Glogow pollution test station. The author is not aware of any case of brittle fracture or decay-like fracture of the glass fiber core in Poland. Brittle fracture of the glass fiber core of composite insulators have been eliminated by the introduction of ECR-type glass fibers.
Keywords: composite insulators, insulators breaking, glass fiber core, brittle fracture, decay-like fracture
Przemysław Sadłowski, Jerzy Hickiewicz
On the 100 th anniversary of the Faculty.
Beginnings of the Faculty of Electrical Engineering at the Warsaw University of Technology
The year 2021 marks the 100th founding anniversary of the Faculty of Electrical Engineering at the Warsaw University of Technology. Presented is here the history of the Faculty from the moment of its founding in 1921 until the outbreak of the WWII. Discussed is the role of its first professors which were Kazimierz Drewnowski, Mieczysław Pożaryski, Stanisław Odrowąż-Wysocki, Konstanty Żórawski, Leon Staniewicz and Roman Trechciński. Attention is turned to the phenomenon of so rapid founding of the Electrical Engineering Faculty – before the end of the 1924/25 academic year, in empty buildings of former Russian university, arose a new and fully-valued Faculty.
Keywords: Warsaw University of Technology, Faculty of Electrical Engineering, history of the Faculty founding