ORIGINAL PAPER
Managing the power supply energy efficiency by means of higher harmonics
1
Department of Power Engineering, Dnipro University of Technology, Ukraine
2
Scientific Research Institute of the Center of Renewable Energy and Energy Efficiency, Universidad Nacional de San Agustin de Arequipa, Peru
3
Faculty of Electrical Engineering, Wroclaw University of Science and Technology, Poland
4
KOMAG Institute of Mining Technology, Poland
5
Management Department, AGH University of Science and Technology, Kraków, Poland
6
Management and Administration, Ivano-Frankivsk National Technical University of oil and Gas Ivano-Frankivsk, Ukraine
Submission date: 2023-12-02
Final revision date: 2024-07-08
Acceptance date: 2024-07-30
Publication date: 2024-12-11
Corresponding author
Polityka Energetyczna – Energy Policy Journal 2024;27(4):59-80
KEYWORDS
TOPICS
ABSTRACT
The paper proposes an innovative solution for managing and ensuring high energy efficiency of power supply systems at high non-linear loads (the problem of non-sinusoidal voltage makes up more than 50% of electricity losses). This is realised by maintaining optimal value of reliability indicators and high quality of power supply. The validation is carried out using analyses and tests of the quality of electromagnetic compatibility (EMC) for an increased number of powered frequency converters. It has been proven that the effective use and reduction of energy consumption can be achieved thanks to the unique technological features of the employed electrical devices. This enables a normal operation of the system with decreased power and adequate control of energy processes. The problem of predicting power losses under changing conditions in a decentralised electrical network has been solved based on the theory of electromagnetic compatibility. The influence of the mains mode parameters and the indices of instantaneous distortion of current and voltage waveforms caused by the operation of converters on the resonance phenomena in power supply systems were investigated. Recommendations were developed for the selection of proper parameters of compensators for 6–10 kV and 0.4–0.66 kV circuits based on the analysis of the optimisation problem when minimising active power losses. The results of our findings may aid parties involved in designing and maintaining power networks in various applications, such as mines, etc. Decisions to improve the energy efficiency of electrical networks fully correspond to the Concept of ensuring energy security of Ukraine.
METADATA IN OTHER LANGUAGES:
Polish
Zarządzanie efektywnością energetyczną zasilania za pomocą wyższych harmonicznych
efektywność energetyczna, zarządzanie systemami zasilania, przetwornice, częstotliwości, wyższe harmoniczne, interharmoniczne
W artykule zaproponowano innowacyjne rozwiązanie zarządzania i zapewnienia wysokiej efektywności energetycznej systemów zasilania przy dużych obciążeniach nieliniowych (problem napięcia niesinusoidalnego stanowi ponad 50% strat energii elektrycznej). Jest to realizowane poprzez utrzymanie optymalnej wartości wskaźników niezawodności i wysokiej jakości zasilania. Walidacja jest przeprowadzana za pomocą analiz i badań jakości kompatybilności elektromagnetycznej (EMC) dla zwiększonej liczby zasilanych przemienników częstotliwości. Udowodniono, że efektywne wykorzystanie i zmniejszenie zużycia energii można osiągnąć dzięki unikalnym cechom technologicznym zastosowanych urządzeń elektrycznych. Umożliwia to normalną pracę systemu przy zmniejszonej mocy i odpowiednią kontrolę procesów energetycznych. Problem przewidywania strat mocy w zmiennych warunkach w zdecentralizowanej sieci elektrycznej został rozwiązany w oparciu o teorię kompatybilności elektromagnetycznej. Zbadano wpływ parametrów trybu sieciowego i wskaźników chwilowych zniekształceń przebiegów prądu i napięcia wywołanych pracą przemienników na zjawiska rezonansowe w systemach zasilania. Opracowano zalecenia dotyczące doboru właściwych parametrów kompensatorów dla obwodów 6–10 kV i 0,4–0,66 kV na podstawie analizy problemu optymalizacji przy minimalizacji strat mocy czynnej. Wyniki naszych ustaleń mogą pomóc stronom zaangażowanym w projektowanie i utrzymanie sieci energetycznych w różnych zastosowaniach, takich jak kopalnie itp. Decyzje dotyczące poprawy efektywności energetycznej sieci elektrycznych w pełni odpowiadają Koncepcji zapewnienia bezpieczeństwa energetycznego Ukrainy.
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