Led Life Assessment by Accelerated Test Methods - A Review

Letha, Shimi Sudha; Bollen, Mhj Math

doi:10.1049/icp.2021.1767

Cited by 4 publications

(7 citation statements)

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“…The impact of these issues is mainly reflected in the load profile of consumers and equipment (overheating of transformers, cables, and motors, malfunction of smart metering devices and the sensitive control equipment, mechanical damage to electrical motors nearby, and impacting the performance of other sensitive control and monitoring instruments) in the grid. Therefore, it is essential to understand how Electrical Vehicle Supply Equipment (EVSE) influence the power quality of power distribution networks, especially low voltage (LV) ones [151].…”

Section: Impacts Of Ev Charging On Power Network a Overviewmentioning

confidence: 99%

“…Since EVSEs draw power from the grid via power electronics-based devices, utility companies are concerned with violating the hosting capacity of LV networks. The hosting capacity of a given network determines the number of EVs that can be charged while keeping the power quality within acceptable limits [151], [156], [157]. For example, transformers might be overloaded with increasing demand for additional EV power in urban areas where load density is high.…”

Section: B Power Quality Issuesmentioning

confidence: 99%

“…Many power electronic devices connected to the grid increase the harmonic emissions in the system. Thus, the erratic charging behaviour of the users of EVs will cause power quality issues in power systems in terms of harmonics, voltage levels, and phase unbalances [148], [151], [158]. Note that special attention is given to the harmonics issue, as the analysis presented in the next section reveals that harmonics are the primary concern for EV charging, especially under low temperatures.…”

Section: B Power Quality Issuesmentioning

confidence: 99%

“…The charging of EVs can influence network voltage issues such as voltage fluctuations. The voltage fluctuation is caused by a change in load current, which causes a change in voltage drop across the grid's source impedance [150], [151]. Light flicker is a common side effect of fast voltage fluctuations.…”

Section: H Voltage Dropsmentioning

confidence: 99%

“…In contrast, the active components of the same devices cause these problems at low voltage levels. Flicker is considered the effect of voltage fluctuations on light intensity due to varying load current [151], [199].…”

Section: H Voltage Dropsmentioning

confidence: 99%

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Electric Vehicles Under Low Temperatures: A Review on Battery Performance, Charging Needs, and Power Grid Impacts

et al. 2023

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Electric vehicles (EVs) are gaining mainstream adoption as more countries introduce netzero carbon targets for the near future. Lithium-ion (Li-ion) batteries, the most commonly used energy storage technology in EVs, are temperature sensitive, and their performance degradates at low operating temperatures due to increased internal resistance. The existing literature on EV-power grid studies assumes that EVs are used under "perfect temperatures" (e.g. 21 Celsius) and temperature-related issues are ignored. In addition, most of the countries/regions with high EV penetration (e.g. Norway, Canada, northern parts of the US and China, etc.) experience harsh cold months, making it extremely critical to understand EV performance and consequently their impacts on the electrical power networks. In this paper, we present a systematic review of the literature that considers the combined investigation of Li-ion battery technology and power networks, with a focus on their operation under suboptimal weather conditions. More specifically, we review: (i) the impact of low temperatures on the electrochemical performance of EV batteries in parking, charging and driving modes, (ii) the challenges experienced by EVs during charging and associated performance degradation, and (iii) the additional impacts of EV charging on the power networks. Our analysis shows that there are serious research gaps in literature and industry applications, which may hinder mass EV adoption and cause delays in charging station roll-out.INDEX TERMS Electric vehicles, Li-ion battery, low temperatures, power grid impacts, power quality. Nomenclature

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Section: Impacts Of Ev Charging On Power Network a Overviewmentioning

confidence: 99%

Section: B Power Quality Issuesmentioning

confidence: 99%

Section: B Power Quality Issuesmentioning

confidence: 99%

Section: H Voltage Dropsmentioning

confidence: 99%

Section: H Voltage Dropsmentioning

confidence: 99%

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Electric Vehicles Under Low Temperatures: A Review on Battery Performance, Charging Needs, and Power Grid Impacts

et al. 2023

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Comparative Performance Analysis of Commercially Available LED Bulbs with Standard LED Bulbs Using Lumen Maintenance Measurements Under Tropical Conditions

Chakraborty,

Mukherjee,

Ganguly

et al. 2023

2023 7th International Conference on Electronics, Materials Engineering &Amp; Nano-Technology (IEMENTech)

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Probabilistic Harmonic Impact Assessment of Multiple Electric Vehicle Fast Charging

Senol,

Bayram,

Galloway

2024

2024 IEEE Transportation Electrification Conference and Expo (ITEC)

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The fast-charging infrastructure for electric vehicles (EVs) is rapidly expanding to support increasing EV penetration levels. These fast-charging nodes serve large electrical loads through power converters, which could lead to power quality issues such as harmonic distortion. This paper proposes a Monte Carlo-based probabilistic methodology to assess the impacts of simultaneous fast charging on total harmonic distortion (THD) using real-world data. It also examines the THD of multiple EV charging instances against power quality industry standards. The inputs of the Monte Carlo simulation include the harmonic content of four EV charging data based on different state of charge (SoC) levels. The initial and final SoC levels are assumed to be random to mimic real-world operations. Moreover, two case studies are carried out by varying the number of vehicles charging simultaneously, ranging from 1 to 20. The vehicles undergo full charging in the former, whereas EVs are charged up to 80% SoC in the latter. For both cases, average THD and the probability of exceeding harmonic levels are calculated after one million iterations. The results indicate that allowing EVs to charge fully significantly increases harmonic content and limits the number of EVs that can be charged at the same time. On the other hand, limiting the maximum SoC level to 80% reduces the probability of exceeding the harmonic limits set by power quality standards.

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Led Life Assessment by Accelerated Test Methods - A Review

Cited by 4 publications

References 0 publications

Electric Vehicles Under Low Temperatures: A Review on Battery Performance, Charging Needs, and Power Grid Impacts

Electric Vehicles Under Low Temperatures: A Review on Battery Performance, Charging Needs, and Power Grid Impacts

Comparative Performance Analysis of Commercially Available LED Bulbs with Standard LED Bulbs Using Lumen Maintenance Measurements Under Tropical Conditions

Probabilistic Harmonic Impact Assessment of Multiple Electric Vehicle Fast Charging

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