Download or read book Characterisation of Partial Discharge Phenomenon in High Voltage Insulation Using Finite Element Method and Matlab Simulink written by Hadi Nabipour Afrouzi and published by . This book was released on 2015 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the 6th International Conference on Electrical Control and Computer Engineering written by Zainah Md. Zain and published by Springer Nature. This book was released on 2022-03-08 with total page 1148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the proceedings of the 6th International Conference on Electrical, Control and Computer Engineering (InECCE 2021), held in Kuantan, Pahang, Malaysia, on 23 August 2021. The topics covered are sustainable energy, power electronics and drives and power engineering including distributed/renewable generation, power system optimization, artificial/computational intelligence, smart grid, power system protection and machine learning energy management and conservation. The book showcases some of the latest technologies and applications developed to solve local energy and power problems in order to ensure continuity, reliability and security of electricity for future generations. It also links topics covered the sustainable developed goals (SDGs) areas outlined by the United Nation for global sustainability. The book will appeal to professionals, scientists and researchers with experience in industry.

Download or read book Study and Characterization of Insulating Material Using Partial Discharge Measurements for Power Electronics Application in HVDC and MVDC written by Somya Anand and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: For future smart grid infrastructures, utilizing the capabilities of recently introduced wide band gap (WBG) devices can significantly reduce the weight, volume and maturation cost of power electronic applications. However, the presence of these devices in the power network will introduce a new electrical constraint in the form of repetitive fast rising square voltage waveforms characterized by high repetition rate. These waveforms might influence the discharge mechanism of insulation system of power equipment in a way, different than AC. Under such circumstances, it becomes necessary to investigate the reliability of power conversion equipment of the future transmission network such as medium frequency transformer (MFT). For high power application, the insulation system of MFT is expected to incorporate dielectric liquid as its primary insulation medium. However, the discharge mechanism of dielectric liquid under fast repetitive square voltage is not very clear today. Therefore, this thesis aims to investigate the partial discharge (PD) mechanism under square voltage waveform to address power electronic applications like MFT. For this, the specifications of a test bench are defined and developed during this thesis to reproduce the electrical stresses in the form of a fast rising unipolar square voltage and switching frequencies above 50 Hz. As the PD measurement under fast rising square voltages is difficult due to electromagnetic interferences caused by high speed switching, the PD detection by optical detection is chosen, which detects the photons emitted during discharge events. To achieve the goal, in the first step the optical detection technique is validated under AC 50 Hz by comparing it to the standard electrical measurement. Then, PD measurements are performed under square voltage waveforms and the results are compared to the AC excitations to understand the impact of non-sinusoidal stress. This work presents the development of a test bench which can generate unipolar square voltage (USV) waveforms with dV/dt between 10-100 kV/μs at 20 kV. It demonstrated optical sensor as a decent partial discharge indicator under high dV/dt. Further, the test bench is assessed to measure partial discharges under varying USV parameters such as changing rise times, repetition rates and duty cycles.

Download or read book Electrical Electronics Abstracts written by and published by . This book was released on 1997 with total page 1860 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Partial Discharge Detection in High voltage Equipment written by F. H. Kreuger and published by Butterworth-Heinemann. This book was released on 1989 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of current knowledge of electrical discharges that do not completely bridge the electrodes. Discharge detection, since 1945 and the use of new high voltage dielectrics, has grown into an indispensable tool for the evaluation of modern insulation. Topics covered include the behavior, detection and measurement of discharges, the choice of detection method and procedure, the location of discharges, and discharge detection in practice. Acidic paper. Annotation copyrighted by Book News, Inc., Portland, OR

Download or read book EM Field Effects on the Surface of Polluted HV Insulators written by Hossam Abd-Elsattar Gouda and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Statistical Analysis of Partial Discharge Inception in High Voltage Insulation written by Steven Lloyd Jones and published by . This book was released on 1983 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Partial Discharge Characterization of High voltage Cables and Components written by and published by . This book was released on 1996 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Partial Discharge in a High Voltage Experimental Test Assembly written by and published by . This book was released on 1998 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was initiated when a new type of breakdown occurred in a high voltage experimental test assembly. An anomalous current pulse was observed, which indicated partial discharges, some leading to total breakdowns. High voltage insulator defects are shown along with their effect on the electrostatic fields in the breakdown region. OPERA electromagnetic field modeling software is used to calculate the fields and present a cause for the discharge. Several design modifications are investigated and one of the simplest resulted in a 25% decrease in the field at the discharge surface.

Download or read book Implementation of a Computer Approach Towards High Voltage Insulation Design Using Finite Element Method written by Wan Mohd. Hanafi Wan Ismail and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Condition Assessment of High Voltage Insulation in Power System Equipment written by R.E. James and published by IET. This book was released on 2008 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers major components of a high voltage system and the different insulating materials applied in equipment, identifying measurable materials suitable for condition assessment, and also analyses insulation fault scenarios that may occur in power equipment.

Download or read book Investigation of the Effects of Humidity and Surface Charge on Partial Discharge in Insulator Posts Under DC Voltage written by Hao Liang Deng and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The flashover mechanism and performance of insulators have always been significant of importance to insulation engineers' attention. A serious flashover accident will damage insulators and influence the reliability of the whole converter station and result in severe outages. It is believed that the flashover and partial discharge phenomena are strongly related to environmental conditions such as temperature, humidity, pressure, pollution's, and even space charges. The motivation of this thesis was to study the random discharge phenomenon that was observed in a Manitoba Hydro's HVDC substation to avoid further insulation damages. However, the lack of data prevents engineers from making firm conclusions. As such a data acquisition system was proposed that will collect leakage current data flowing in a reactor's insulation post, to help to build a better understanding of the correlation between PD and environmental influences. The field tests at the HVDC substation studied the behavior of the leakage current from smoothing reactor's ground wire and its associated electric field changes. Through the field tests, we found that the discharge phenomena exists only under certain weather conditions were. One hypothesis for partial discharge occurring on the insulator stacks is the influences of moisture and static charge. Moisture helps the static charge buildup on the insulator will spread along the insulator surface and create a conducting path between the smoothing reactor, flange, and ground. The sharp edge of the flange within this conducting path will generate corona and cause a discharge problem. For the laboratory experiments, humidity and surface charge studies were implemented in air and on FRP insulators under HVDC in order to get a better understanding of environmental influences on partial discharge behaviors. The results demonstrated that for a given electrode configuration, both humidity and surface charge have significant effects on the behavior of partial discharge. We also noticed that the relationship between total charge magnitude Q and equivalent frequency F followed a curve with exponential decay, and under high humidity environment or with surface charge present, the decay speed was faster than normal conditions. And the lab results also proved that time-frequency-charge (TFQ) mapping technique can be used for HVDC PD identifications.

Download or read book The Detection of Partial Discharge in High Voltage Insulating Materials Cable and Cable Terminations Using Acoustic Emission Techniques written by Daming Zhu and published by . This book was released on 1996 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Detection Recording and Analysis of Partial Discharge in Electrical Insulation Using Computer Methods written by Peter Anthony White and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Voltage Engineering written by Farouk A.M. Rizk and published by CRC Press. This book was released on 2018-09-03 with total page 801 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inspired by a new revival of worldwide interest in extra-high-voltage (EHV) and ultra-high-voltage (UHV) transmission, High Voltage Engineering merges the latest research with the extensive experience of the best in the field to deliver a comprehensive treatment of electrical insulation systems for the next generation of utility engineers and electric power professionals. The book offers extensive coverage of the physical basis of high-voltage engineering, from insulation stress and strength to lightning attachment and protection and beyond. Presenting information critical to the design, selection, testing, maintenance, and operation of a myriad of high-voltage power equipment, this must-have text: Discusses power system overvoltages, electric field calculation, and statistical analysis of ionization and breakdown phenomena essential for proper planning and interpretation of high-voltage tests Considers the breakdown of gases (SF6), liquids (insulating oil), solids, and composite materials, as well as the breakdown characteristics of long air gaps Describes insulation systems currently used in high-voltage engineering, including air insulation and insulators in overhead power transmission lines, gas-insulated substation (GIS) and cables, oil-paper insulation in power transformers, paper-oil insulation in high-voltage cables, and polymer insulation in cables Examines contemporary practices in insulation coordination in association with the International Electrotechnical Commission (IEC) definition and the latest standards Explores high-voltage testing and measuring techniques, from generation of test voltages to digital measuring methods With an emphasis on handling practical situations encountered in the operation of high-voltage power equipment, High Voltage Engineering provides readers with a detailed, real-world understanding of electrical insulation systems, including the various factors affecting—and the actual means of evaluating—insulation performance and their application in the establishment of technical specifications.

Download or read book Electromagnetic Modeling by Finite Element Methods written by João Pedro A. Bastos and published by CRC Press. This book was released on 2003-04-01 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unlike any other source in the field, this valuable reference clearly examines key aspects of the finite element method (FEM) for electromagnetic analysis of low-frequency electrical devices. The authors examine phenomena such as nonlinearity, mechanical force, electrical circuit coupling, vibration, heat, and movement for applications in the elect

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt: