Comparative analysis of effects of electric vehicle loads on distribution system voltages

Dubey, Anamika; Santoso, Surya; Cloud, Matthew P.

doi:10.1109/tdc.2014.6863339

Cited by 9 publications

(10 citation statements)

References 8 publications

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“…Similarly, [19] investigates the effects of EV charging on distribution voltages, line drops, and system losses and [20] evaluates EV charging impacts on voltage limits, power quality, and power imbalance. In [21]- [24], several circuit parameters, both at local and global level affecting distribution voltages during EV charging are evaluated. Based on the analysis, it is concluded that that a large-scale EV deployment could violate recommended limits for secondary wire voltages and could cause voltage unbalance.…”

Section: ) Ev Load Impact On Distribution Power Qualitymentioning

confidence: 99%

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Electric Vehicle Charging on Residential Distribution Systems: Impacts and Mitigations

2015

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This paper aims to understand, identify, and mitigate the impacts of residential electric vehicle (EV) charging on distribution system voltages. A thorough literature review on the impacts of residential EV charging is presented, followed by a proposed method for evaluating the impacts of EV loads on distribution system voltage quality. Practical solutions to mitigate EV load impacts are discussed as well including infrastructural changes and indirect controlled charging with Time-of-Use (TOU) pricing. An optimal TOU schedule is also presented, with the aim of maximizing both customer and utility benefits. The paper also presents a discussion on implementing smart charging algorithms to directly control EV charging rates and EV charging starting times. Finally, a controlled charging algorithm is proposed to improve voltage quality at the EV load locations while avoiding customer inconvenience. The proposed method significantly decreases the impacts of EV load charging on system peak load demand and feeder voltages.

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Section: ) Ev Load Impact On Distribution Power Qualitymentioning

confidence: 99%

“…The peak load demand recorded at the substation is 7.77 MW. The load demands at the individual customer locations are determined by running a load allocation algorithm using customer consumption data, connected kVA information, and measured load demand at the substation [22]. …”

Section: ) Distribution Circuit Modelmentioning

confidence: 99%

Electric Vehicle Charging on Residential Distribution Systems: Impacts and Mitigations

2015

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“…Furthermore, although the analysis is done for only one 50-kW distribution transformer, the results are scalable to a general distribution circuit supplying for several distribution transformers. EV loads primarily affect secondary service voltages [5] and thus are unlikely to affect customer loads supplied by other secondary circuit transformers. Therefore, the recommendations drawn for one service transformer can be applied to the entire distribution circuit.…”

Section: Discussionmentioning

confidence: 99%

“…Table 1 summarizes various charging scenarios considered in this section and their evaluation parameters. It should be noted that the charging scenarios specified in Table 1 are simulated for both a 24-kWh (Nissan Leaf) 4 and a 16-kWh (Chevy Volt) 5 EV load. First, the unscheduled charging scenario representing the case when TOU pricing is not implemented by utilities is simulated.…”

Section: Details Of the Simulated Charging Scenariosmentioning

confidence: 99%

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Determining Time-of-Use Schedules for Electric Vehicle Loads: A Practical Perspective

Dubey

Santoso

Cloud

et al. 2015

IEEE Power Energy Technol. Syst. J.

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Analyses have shown that electric vehicle (EV) loads may considerably affect the secondary service voltage quality. One of the ways to mitigate voltage drop concerns is to use a time-of-use (TOU) pricing scheme. A TOU pricing scheme utilizes the off-peak generation for EV charging, thus deferring any immediate grid upgrade and improving the grid sustainability. This paper evaluates various aspects of EV charging under a TOU schedule, with off-peak rates starting at hours ranging from 8 P.M. to 3 A.M. The study is conducted using an actual residential distribution circuit. A best practical time to begin the off-peak rates is determined so that the effects of EV charging on the secondary service voltages are minimized while ensuring that EVs are fully charged by 7 A.M., thus maximizing both grid and customer benefits. The analysis suggests that the best time to begin off-peak rates is between 11 P.M. and 12 A.M. Furthermore, the analysis also suggests that setting up TOU off-peak rates at the latter half of the peak load demand, for example, at 8 P.M., is detrimental to the distribution circuit voltage quality. The result indicates that the existing utility TOU scheme may exacerbate voltage drop problems due to EV load charging. INDEX TERMS Distribution system, electricity market, electric vehicle (EV), time-of-use (TOU) pricing.

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A comprehensive review on impacts of electric vehicle charging on the distribution network

Verma

Tripathi

Naqvi

2021

2021 International Conference on Control, Automation, Power and Signal Processing (CAPS)

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Comparative analysis of effects of electric vehicle loads on distribution system voltages

Cited by 9 publications

References 8 publications

Electric Vehicle Charging on Residential Distribution Systems: Impacts and Mitigations

Electric Vehicle Charging on Residential Distribution Systems: Impacts and Mitigations

Determining Time-of-Use Schedules for Electric Vehicle Loads: A Practical Perspective

A comprehensive review on impacts of electric vehicle charging on the distribution network

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