Flexible Rogowski Current Probes in Measurements of Ultra-Fast SiC MOSFET Modules – Limitations and Challenges
Published by Dawid ZIĘBA1, Jacek RĄBKOWSKI2, Medcom Company (1), Warsaw University of Technology, Institute of Control and Industrial Electronics (2) ORCID: 1. 0000-0003-3789-6851; 2. 0000-0001-8857-3505 Abstract. The article presents a discussion on the limitations of the flexible Rogowski current probes in the measurements of switching processes in ultra-fast SiC MOSFET power modules. The probes feature limited bandwidth of up to 50 MHz and might be susceptible to electromagnetic interferences caused by the rapid-switching processes. The obtained waveforms of the SiC MOSFET power module are compared to the waveforms captured using calibrated coaxial current shunt resistor that features a 2 GHz…
Keep readingLegislative Assistance for Prosumer Energy within the Framework of Electrical Safety of Power Network
Published by Wiktoria GRYCAN, Wroclaw University of Science and Technology, ORCID: 0000-0001-8121-7612 Abstract. Prosumerism is inherently designed to be a tool that alleviates the grid. Still, not every prosumer aligns the consumption profile with the energy generation profile in photovoltaic installations. Therefore, the rapid development of Renewable Energy Sources (RES) in Poland, especially photovoltaic installations, has changed the energy generation structure, altering the working conditions in the grid. This work aims to identify how the current legislative support affects the profitability of RES and to determine how they should be adjusted to encourage investment in the right groups of recipients…
Keep readingSome Issues of Increasing the Efficiency of Electric Machines
Published by Samira KHANAHMEDOVA, Azerbaijan State Oil and Industry UniversityORCID: 0000-0001-8862-1570 Abstract. The article discusses ways to reduce losses to increase efficiency in electric machines. The amount of energy loss is determined by the efficiency coefficient. The issues of changing the size of an electric machine under electromagnetic loads with a constant power source and constant voltage are considered. It is taken into account that reducing energy losses reduces the degree of environmental pollution, which contributes to improving life around the world. The analysis of the dimensions of an electric machine is given, that is, the possibility of reducing electricity…
Keep readingDamaged X-ray Equipment at Major Health Care Center
Published by Dranetz Technologies, Inc. Website: Dranetz.com Severe power quality problems damaged X-ray equipment, costing $100,000 in one instance. The source of the problem was the switch over from utility to generator power, during regular testing and emergency situations. Figure 1 (below) identified the cause of the problem, an out-of-phase transfer, captured by On Power with a Dranetz 658 Analyzer. Ideally, an online UPS represents the best solution when protecting against low frequency / high energy events such as >out-of-phase transfers (capacitor bank switching represent similar problems). The challenge was dealing with the size and shape of the inrush currents the X-ray…
Keep readingApplication Of Optical Current Sensors in Electric Substations
Published by Ilham RAHIMLI1, Aliashraf BAKHTIYAROV2, Gulshan ABDULLAYEVA3, Sona RZAYEVA4. Azerbaijan State Oil and Industry University ORCID: 1. 0009-0006-1976-4475; 3. 0000-0003-0168-9623; 4. 0000-0001-7086-9519 Abstract. Despite the fact that current transformers have been used for many years in certain sections of the electrical network, in power supply, to power the circuits of an electrical measuring installation, meters, and relay automation installations, they have various disadvantages, in particular, due to a fairly high accuracy class and error when integrated with modern digital technology. Depending on the requirements for traditional current transformers, they are divided into accuracy classes, i.e. 0.2; 0.5; 1; 3;…
Keep readingTesting of a Micro Hydro Power Plant Using a Cross-Flow Type Turbine
Published by Sri SUWASTI, Musrady MULYADI, Yiyin KLISTAFANI, Muhammad Ruswandi DJALAL, State Polytechnic of Ujung Pandang Abstract: The implementation of Micro Hydro Power Plants (MHPP) serves as a crucial initiative to address the uneven distribution of electrical energy in remote areas across Indonesia. Before the permanent installation of an MHPP, field testing is imperative, involving the use of a model or prototype to gather location-specific data, assess reliability, and enhance insights into the MHPP’s functionality as an electrical energy generator. This research endeavors to comprehend the operation of the Cross-flow turbine MHPP system and ascertain its output power and efficiency.…
Keep readingPQ Terms & Definitions
Published by Dranetz Technologies, Inc. Website: Dranetz.com PU (Per Unit) Explained PU stands for Per Unit. It is a term that electric utility engineers frequently use, and it was incorporated into IEEE 1159. PU is the percentage formed by dividing the actual voltage by the nominal. For example, a sag to 0.8 pu on a 480V circuit would be a sag to 366V, and an interruption to 0.1 pu on a 120V circuit would be 12V. The idea of “per unit” is to express a voltage without regard to the nominal, since through the various transformers in an electric utility system, the…
Keep readingModern Methods Of Evaluating the Technical Condition of Power Transformers
Published by Tural Aliyev1, Aydin Aliyev2,Azerbaijan State Oil and İndustry University, Baku, Azerbaijan ORCID: 1. 0000-0003-0751-3952, 2. 0000-0002-1631-0543 Abstract. This article aims to shed light on the critical aspects of power transformer assessment and proposes avenues for improvement in current methodologies, emphasizing the need for a more comprehensive and integrated approach to ensure the reliability and longevity of power transformers in the evolving landscape of the power system. Streszczenie. Celem tego artykułu jest rzucenie światła na krytyczne aspekty oceny transformatorów mocy i zaproponowanie możliwości ulepszenia obecnych metodologii, podkreślając potrzebę bardziej wszechstronnego i zintegrowanego podejścia w celu zapewnienia niezawodności i trwałości…
Keep readingConsiderations for Energy Saving and Street Lighting Lamps Replacement in Jordanian Roads
Published by Adnan M Al-Smadi, Tariq M Alrjoub, Yarmouk University, Hijjawi Faculty for Engineering Technology, Jordan ORCID:000-0003-3796-6805X Abstract. For the last several years, the demand for electricity in Jordan has increased. This increase is due to the change of climate conditions and high temperatures, which led to the increase of the use of air conditioning units. One important issue in energy consumption is the use of energy in street lighting. This paper aims to study and re-evaluate the current standard road lighting structures and schemes in Jordan within Jordanian recommendations. The study included a survey of the streets in those…
Keep readingEfficient High Voltage Gain Simplified DC-DC Converter for Enhanced Solar Power Harvesting
Published by Shanmugavadivu Natarajan, Department of Electrical and Electronics Engineering, Sri Venkateswara College of Engineering, Sriperumbudur, 602117, India Abstract. This study introduces a novel transformerless high voltage gain DC-DC converter for solar power. It combines a two-inductor boost converter, voltage multiplier, and switched capacitor cells, achieving a remarkable high voltage gain with 98.24% efficiency. A 200 W prototype was tested, confirming a peak efficiency of 96.2% in real-world conditions. It also maintains 97% efficiency in motor load systems, reducing energy consumption and maintenance costs. This innovative converter enhances solar energy harvesting and has versatile power conversion potential, marking a significant…
Keep readingBlockchain Technology in Electromobility and Electrification of Transport
Published by Anna ZIELIŃSKA, AGH University of Science and Technology, Faculty of Management Abstract: The article describes the possibilities of using blockchain technology in the electromobility sector and in various areas of the autonomous vehicle sector. The aim of the article is to present the dynamics of the development of blockchain technology in markets such as electricity trading, tracking the supply of rare earth elements for the construction of batteries, tracking certificates of origin for energy, applications in cooperation with the power grid, and others. on the implementation of solutions based on blockchain technology in the process of charging electric…
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