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Threshold-Based Random Charging Scheme for Decentralized PEV Charging Operation in a Smart Grid.

Ojin Kwon1, Pilkee Kim2, Yong-Jin Yoon3

  • 1School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore. ojinkwon518@gmail.com.

Sensors (Basel, Switzerland)
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Summary

Smart grids need better plug-in electric vehicle (PEV) charging coordination. A new decentralized method reduces PEV charging requests by 51% by enabling PEVs to manage their own charging based on battery levels.

Keywords:
decentralized charging algorithmelectric vehiclesoverhead reductionplug-in electric vehiclereduction of charging participationsmart gridthreshold

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Area of Science:

  • Electrical Engineering
  • Computer Science
  • Energy Systems

Background:

  • Smart grids are essential for integrating electric vehicles (EVs) into power systems.
  • Coordinated charging is crucial to prevent grid overload from numerous EVs charging simultaneously.
  • Existing centralized systems face computational complexity and real-time data exchange challenges.

Purpose of the Study:

  • To propose a decentralized charging strategy for plug-in electric vehicles (PEVs) to reduce central controller complexity.
  • To optimize PEV charging performance and distribution system load.
  • To address the challenges of real-time monitoring and data exchange in smart grid EV charging.

Main Methods:

  • Developed a novel threshold-based random charging (TBRC) operation for decentralized PEV charging.
  • PEVs autonomously manage charging requests based on pre-set battery thresholds and random access rates.
  • Statistically calculated charging thresholds and access rates using average supply power, avoiding real-time updates.

Main Results:

  • Achieved a 51% reduction in PEV charging requests.
  • Significantly decreased the computational complexity of the central controller.
  • Demonstrated effective PEV charging coordination with tolerable degradation in charging performance.

Conclusions:

  • The proposed TBRC offers an efficient decentralized solution for managing PEV charging in smart grids.
  • This method alleviates central controller burden and simplifies real-time data requirements.
  • TBRC balances charging needs with grid stability, paving the way for increased PEV integration.