International Standards for Power Quality Measurement Systems
Published by P Axelberg, Unipower AB, Sweden & M H. J. Bollen, Chalmers University of Technology, Sweden I. INTRODUCTION During the last decade, there has been an increasing focus on power quality (PQ). The interest and demand for quality assurance of electrical power has several fundamental causes. First of all, electrical power can be considered a product for which assured quality offers incentives to both buyer and seller. Secondly, large amounts can be saved by permanently keeping track of the quality of power from the electrical grid or network. Based on the analysis from the measurements, a cost effective maintenance…
Keep readingImproving Energy Output and Efficiency of PV Installations using Bifacial Panels in Public Facilities
Published by 1. Jacek KUSZNIER, 2. Marcin SULKOWSKI, 3. Gabriela Druć, Bialystok University of Technology, Faculty of Electrical Engineering ORCID: 1. 0000-0001-8436-5717; 2. 0000-0002-3079-314X Abstract. The issue of improving the energy efficiency of photovoltaic installations is very important due to the limited location options in public facilities. Therefore, this paper presents the possibilities of improving the efficiency of photovoltaic installations in such facilities using bifacial PV panels. An assessment of the energy yields and installation efficiency depending on the roofing used is made, together with an economic analysis of the effects of bifacial panels. Streszczenie. Zagadnienie poprawy efektywności energetycznej w…
Keep readingThermodynamic Modelling of Waste to Energy Power Plant: A Case Study in Makassar City, Indonesia
Published by 1.Nur HAMZAH, 2.Suryanto SURYANTO, 3.Muhammad ANSHAR, 4.Firman FIRMAN, 5. Muhammad Ruswandi DJALAL, 6. Muhammad Alif AL AFGAN. State Polytechnic of Ujung Pandang ORCID: 1. 0000-0002-7114-2247 Abstract. Waste is a major problem in big cities in Indonesia, one of which is Makassar City. Every year the amount of waste generated by the residents of Makassar City continues to increase, but this is not proportional to the capacity of the landfill. Therefore, researchers want to design a waste-to-energy power plant system in Makassar City or other words apply the waste-to-energy concept. The waste-to-energy concept aims to process waste into energy…
Keep readingRevenue Accurate vs. Revenue Certified/Grade
Published by Dranetz Technologies, Inc., Technical Documents – White Paper INTRODUCTION In addition to our energy metering products, most Dranetz Power Quality products can also compute and measure common energy parameters such as W, VA, VAR, PF, Demand, Energy, and more. The ability to measure energy in addition to PQ opens the door to many more applications, including energy only applications that can include electrical consumption. When measuring electrical consumption for billing, revenue, meter verification, or other purposes, high accuracy is often required. When the metered data is used for billing purposes, a revenue certified/grade meter may be required by code or…
Keep readingAn Analysis of Elimination of Interferences in the Supply System of An Industrial Plant
Published by Jacek KOZYRA1, Zbigniew ŁUKASIK1, Aldona KUŚMIŃSKA-FIJAŁKOWSKA1, Piotr TAŃSKI2, Kazimierz Pulaski University of Radom, Faculty of Transport, Electrical Engineering and Computer Science (1) Baxtom Sp. z o.o, (2) ORCID: 1. 0000-0002-6660-6713, 2. 0000-0002-7403-8760, 3. 0000-0002-9466-1031 Abstract. Poor quality of electric energy is a large problem for most of the enterprises and production plants taking actions aiming at increasing energy efficiency. Many of them have already implemented the simplest means ensuring proper quality of energy that do not require large investments. Interferences of qualitative parameters of energy will be more frequent, which is caused by ageing infrastructure and introduction of…
Keep readingFlexible 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.…
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