The Impact of EVs on the Electric Grid
Published by Harsha Korde, EE Power – News: The Impact of EVs on the Electric Grid, May 14, 2022 With gas prices rising, electric vehicles are becoming more popular, but transportation decarbonization remains a major issue. With gasoline prices rising and the effects of climate change increasingly acute, transportation electrification is gaining steam in countries throughout the world. The benefits of a transition toward electric vehicles (EVs), and away from the compressed natural gas (CNG) fueling those with traditional internal combustion engines (ICEs), are many: reduced carbon emissions, less noise pollution, improved air quality and enhanced energy efficiency, among others. Planning…
Keep readingReliability of Open Public Electric Vehicle Direct Current Fast Chargers
Published David Rempel1, Carleen Cullen1,2, Mary Matteson Bryan1, Gustavo Vianna Cezar3, 1Department of Bioengineering, University of California, Berkeley, CA, USA2Cool the Earth, Kentfield, CA, USA3SLAC National Accelerator Laboratory, GISMo Group, CA, USA Abstract. In order to achieve a rapid transition to electric vehicle driving, a highly reliable and easy to use charging infrastructure is critical to building confidence as consumers shift from using familiar gas vehicles to unfamiliar electric vehicles (EV). This study evaluated the functionality of the charging system for 657 EVSE (electric vehicle service equipment) CCS connectors (combined charging system) on all 181 open, public DCFC (direct current…
Keep readingHybrid Switch for Capacitors Bank used in Reactive Power Compensation
Published by Adam RUSZCZYK1, Krzysztof KÓSKA1, Konrad JANISZ2ABB Corporate Research Centre, Poland (1), AGH University of Science and Technology, Poland (2) Abstract. This paper describes new concept of a switch dedicated for control of three-phase capacitor bank used for low voltage, reactive power compensation. The proposed device utilizes fully controlled IGBT transistors that gives possibility to break capacitor current in moment that ensures zero voltage remaining on capacitor’s terminals. This minimize voltage stress for switch and capacitor as well as allows to turn-on again capacitors bank without unnecessary delay. This paper describes structure of hybrid switch and its operation with…
Keep readingPower Quality – IEEE 519-2022
Published by Comsys AB, website: comsys.se, ADF Technology: Power quality – IEEE 519-2022 A commonly used and very important standard is IEEE 519-2022 (previous versions IEEE 519-1992 and IEEE 519-2014). The standard, among other things, puts two requirements on harmonics; and absolute maximum THDU level, and a variable maximum TDD level. All limits are applied to the Point of Common Coupling (PCC), which is the interface between utility (sometimes called operator) and consumer. The PCC can be located at any voltage level. In some cases, the PCC is considered to be an internal point in a system of particular interest;…
Keep readingTropical Climate Effects on Corona Power Losses on 275 kV Transmission Lines in the South Sulawesi System
Published by Ikhlas KITTA, Salama MANJANG, Ida RACHMANIAR, Faris MARICARElectrical Engineering Department, Hasanuddin University, Indonesia Abstract. Electricity losses are very dependent on electric current and loss of the corona phenomenon. It is very clear that losses depend on network parameters, load behaviors and climatic factors. South Sulawesi is a tropical climate. This sector must be resistant to exposure to various factors of high tropical climate such as temperatures of 23.4⁰C – 33.3⁰C, sun irradiation that occurs more than 12 hours per day, relative humidity close to 100%, and average rainfall between 440-1322 mm . This climate factors will simultaneously transmit…
Keep readingSolving Electric Vehicle Development Challenges
Published by Mark Patrick, EE Power – Technical Articles: Solving Electric Vehicle Development Challenges, July 14, 2022. A potentially viable approach to solving the development challenges associated with electric vehicles to save both weight and cost. The growth in EV adoption is a clear and obvious trend, confirmed in several recent industry reports. While the pandemic paused car sales globally, consumers have had time to reflect on their vehicle replacement options, and it appears many are considering an EV as a viable choice. However, many potential obstacles to widespread consumer adoption exist, the most notable being range and charging time anxiety.…
Keep readingAre You Compliant with the IEEE 519-2022 Edition?
Published by Elspec LTD, website: elspec-ltd.com The IEEE 519 standard defines the voltage and current harmonics distortion criteria for electrical systems design. The IEEE 519-2022 edition replaces the 2014 edition from December 2022. The IEEE 519-2022 edition includes two important changes: • Installations with mixed loads and Inverter Based Resources/Distributed Energy Resources• Even current harmonics limits New Guidelines for Installations with Mixed Loads and Inverter Based Resources/Distributed Energy The 2022 edition instructs you whether to follow the IEEE-519 compliance criteria or different standards, as follows 1. IEEE-519 current limits at the point of common coupling (PCC) should be applied if…
Keep readingUnderstanding the IEEE 519–2014 Standard for Harmonics
Published by Elspec LTD, website: elspec-ltd.com The IEEE 519-2014 standard defines the voltage and current harmonics distortion criteria for the design of electrical systems. The existed voltage and current waveforms in every part of the system are explained in this standard, and the waveform distortion goals for the system designer are established. The standard is periodically updated as the industry evolves. Since its introduction in 1981, the standard has been updated several times and its latest edition is IEEE 519-2014. Some updates have been made by 2022 (see here). The main terms definitions and statistical evaluation technics are being covered…
Keep readingAssessment of the Impact of the Micro Wind Turbine on the Power Quality in the Distribution Network
Published by Marek GAŁA, Andrzej JĄDERKO, Politechnika Częstochowska, Wydział Elektryczny Abstract. The article presents the principles of measurements and assessment of power quality characteristics, with the power supplied by the micro wind turbine connected to the distribution network. It describes the basic technical parameters of the vertical axis micro wind turbine 10 kW and the characteristics of its output as a function of wind speed. Besides, it shows selected results of measurements of parameters characterizing the power quality in the node of micro wind turbine of 10 kW connection to the 400 V network. Streszczenie. W artykule przedstawiono zasady pomiarów…
Keep readingHARMONICS: Understanding the Facts – Part 3
Published by Richard P. Bingham Abstract. Understanding what is important to know about harmonics can be challenging for those without extensive electrical engineering backgrounds. This is third and final part of a three part series. This part will provide details on what causes harmonic problems and suggested solutions. What they look like One recent survey showed the percentage the total electrical consumption by non-linear loads will double from the year 1985 to 2000. The AC-DC converter used in the switching-type power supplies found in most personal computers and peripheral equipment, such as printers, is an example of a non-linear load.…
Keep readingHARMONICS: Understanding the Facts – Part 2
Published by Richard P. Bingham Abstract. Understanding what is important to know about harmonics can be challenging for those without extensive electrical engineering backgrounds. In this two part series, this second article will help to clarify why you need to be concerned about them, how and where to find them, and when they are a problem. Why Worry About Harmonics The presence of harmonics does not mean that the factory or office cannot run properly. Like other power quality phenomena, it depends on the “stiffness” of the power distribution system and the susceptibility of the equipment when operating in the…
Keep readingHARMONICS: Understanding the Facts – Part 1
Published by Richard P. Bingham Abstract. Understanding what is important to know about harmonics can be challenging for those without extensive electrical engineering backgrounds. In this three part series, this first article will review what a harmonic is, the second will help to clarify what those important facts are, and the third will provide details on what causes harmonic problems and suggested solutions. Why a Sine Wave Before defining what a harmonic is, it is useful to review why electrical power is generated in the form of a sine wave, as shown in Figure 1. In much of the world,…
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