Detection of Corona Discharge in Electric Networks

The book is devoted to the solution of the problem of determining the presence of corona discharge on electrical equipment with acoustic radiation. It is shown that corona discharge leads not only to irreversible losses of electrical energy, but also interferes with the transmission of high-frequency signals, deteriorates insulating elements, can become a source of conditions for the occurrence of a destructive arc discharge and is one of the factors of changing the continuity of the electrical system as a whole. The book describes the processes in a corona discharge that lead to the occurrence of acoustic waves. The authors analyzed acoustic radiation from a corona discharge reproduced in laboratory conditions. The received acoustic signals were processed by Fourier transform. Thus, the features of the spectral function, which belong specifically to the corona discharge in electrical networks with industrial frequency current, were determined. Based on the inverse Fourier transform, a simplified model of the acoustic radiation of the corona discharge was constructed. The authors proposed a method for detecting the presence of a corona discharge based on the spectral characteristics of acoustic radiation. Techniques were developed to determine the presence of a corona discharge for the creation of stationary and mobile devices. The advantages of the method of detecting the presence of corona discharge by the acoustic spectrum are shown. The method makes it possible to determine the presence of a corona discharge remotely, even out of direct sight, regardless of the time of day and regardless of the season. The book states that determining the presence of a corona discharge is not enough, it is still necessary to determine its location. The method of finding the coordinates of the corona discharge as a source of sound was described. Methods of searching for corona discharge coordinates with a fixed scanning device and a moving scanning device are proposed. A UAV is proposed as a mobile platform for the scanning system. The influence of the Doppler effect on acoustic measurements when the UAV speed changes was taken into account. The authors have shown that the use of coronal discharge detection with UAVs will not only enable the prevention of coronal discharge, but also increase the frequency of surface inspections. This will allow timely measures to be taken to improve the reliability of the power system operation. The book is intended for the researchers, postgraduate students and students specialized in theory and calculations of electrical systems.

Preface.- Contents.- Development of Approaches to the Quality of Electricity Supply.- Influence of Corona Discharge on Electric Power Supply Parameters.- Detection of Corona Discharge in Power Supply System.- Theoretical Principles of Acoustic Radiation Created by Corona Discharge.- Recognition of Corona Discharge Presence by Spectral Characteristics of Acoustic Radiation.- Instruments for Identification of Corona Discharge Presence by Spectral Characteristics of Acoustic Radiation.- Theoretical Basis of Determination of Corona Discharge Coordinates by Acoustic Radiation.- Instruments for Corona Discharge Coordinate Search as a Source of Acoustic Radiation.- Prospects for the Development of Corona Discharge Detection Method by Spectral Acoustic Radiation.- Economic Effect of the Use of the Method of Diagnosing the State of Power Lines at the Expense of UAVs.

Prof. Yevgen Sokol is the Rector in the National Technical University ”Kharkiv Polytechnic Institute”. He graduated from the Kharkiv Polytechnic Institute in 1975. He obtained his Ph.D. in 1979 and Dr. Sc. (Eng.) in 1994. The title of Professor he obtained in 1998. He is a laureate of the State Prize of Ukraine in the field of science and technology (2017), chosen as a Corresponding Member of the National Academy of Sciences of Ukraine (2012), winner of the all-Ukrainian competition "Leader of the fuel and energy complex" in the nomination "Scientific and technical development" (2005), winner of the competition “High Potential” scientific for the sake of complex problems of energy of the National Academy of Sciences of Ukraine (2004), laureate of the certificate of honor of the Cabinet of Ministers of Ukraine for significant personal contribution to the development of education and science (2002), laureate of the Lebedev Prize of the National Academy of Sciences of Ukraine (2001) and others. His main professional activity is associated with institutions of the NAS of Ukraine and institutions of higher education of the Ministry of Education and Science of Ukraine: Institute of Mechanical Engineering Problems named after A.M. Pidgorny; Institute of General Energy; National Technical University “Kharkiv Polytechnic Institute (1969 - till now). For more than 35 years, he has led scientific projects funded by the National Academy of Sciences of Ukraine and the Ministry of Education and Science of Ukraine. Prof. Yevgen Sokol taught undergraduate courses in “Microprocessor technology” for students of the National Technical University “Kharkiv Polytechnic Institute”. He supervises the training of postgraduate and doctoral students at National Technical University “Kharkiv Polytechnic Institute”. Prof. Yevgen Sokol has published more 400 scientific works, among them over 24 articles 100 conference proceedings in international peer-reviewed journals. His current research interests include: Microprocessor control of semiconductor electrical energy converters; Methods of analysis and synthesis of microprocessor control algorithms with mapping on the complex plane; Applied research in the field of development of medical devices and systems that are associated with the development of microprocessor control system; Development of new types of physiotherapeutic medical equipment. Prof. Vitalii Babak is the Director of the General Energy Institute of the National Academy of Sciences of Ukraine. He graduated from the Information-Measuring Equipment Department of the Kyiv Polytechnic Institute in 1977. He obtained his Ph.D. in 1981 and Dr. Sc. (Eng.) in 1995. From 1977 to 1995, he worked in various positions at the Kyiv Polytechnic Institute. From 1995 to 1998, he worked as Deputy Minister of Education, Head of the Main Accreditation Department of the Ministry of Education of Ukraine. From 1998 to 2008, he was the Rector of the National Aviation University (Kyiv, Ukraine). In 2003, Vitalii Babak was elected as Corresponding Member of the National Academy of Sciences of Ukraine. From 2008 to 2021 he worked as the Deputy Director for Science, Head of the Department, Chief Researcher of the Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine. From 2022 till now Vitalii Babak is Acting Director of the General Energy Institute of the National Academy of Sciences of Ukraine. Vitaly Babak is a well-known scientist in the field of energy and information-measuring technologies. He created scientific schools in the field of technical diagnostics and information-measuring technologies. Among his students are 19 doctors and 30 candidates of sciences. During his professional activity, Vitalii Babak was awarded the State Prize of Ukraine in the field of science and technology, the Honorary Diploma of the Verkhovna Rada of Ukraine, the Honorary Diploma of the Cabinet of Ministers of Ukraine, Orders of Merit (II degree, III degree). Vitali Babak is the author of more than 600 scientific works, including 20 monographs, 40 textbooks and dictionaries, 120 patents. Dr. Artur Zaporozhets is working as Leading Researcher in the General Energy Institute of the National Academy of Sciences of Ukraine. He graduated from the Applied Physics Department of the National Aviation University in 2013. He obtained his Ph.D. in 2017 and Dr. Sc. (Eng.) in 2022. The title of Senior Researcher in Metrology and Information-Measuring Technology he obtained in 2019. He is a laureate of the Medal "For work and achievement" (2022), Award of the NAS of Ukraine for young scientists (2022), Award of the Verkhovna Rada of Ukraine to young scientists (2021), Award of the President of Ukraine for young scientists (2019) and others. His main professional activity is associated with institutions of the NAS of Ukraine: G.V. Kurdyumov Institute of Metal Physics (2009-2011), Institute of Engineering Thermophysics (2013-2021), General Energy