Impact of Electric Vehicle Aggregator with Communication Time Delay on Stability Regions and Stability Delay Margins in Load Frequency Control System

Naveed A., Sonmez S., Ayasun S.

JOURNAL OF MODERN POWER SYSTEMS AND CLEAN ENERGY, cilt.9, sa.3, ss.595-601, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 9 Sayı: 3
  • Basım Tarihi: 2021
  • Doi Numarası: 10.35833/mpce.2019.000244
  • Dergi Adı: JOURNAL OF MODERN POWER SYSTEMS AND CLEAN ENERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC, Directory of Open Access Journals
  • Sayfa Sayıları: ss.595-601
  • Anahtar Kelimeler: Delays, Power system stability, Frequency control, Stability criteria, Delay effects, ISO, Communication time delay, electric vehicle (EV) aggregator, frequency regulation, proportional-integral (PI) controller design, stability delay margin, stability region, COMPUTATION, PI
  • Gazi Üniversitesi Adresli: Evet

Özet

This paper investigates the impact of electric vehicle (EV) aggregator with communication time delay on stability regions and stability delay margins of a single-area load frequency control (LFC) system. Primarily, a graphical method characterizing stability boundary locus is implemented. For a given time delay, the method computes all the stabilizing pro-portional-integral (PI) controller gains, which constitutes a stability region in the parameter space of PI controller. Secondly, in order to complement the stability regions, a frequency-domain exact method is used to calculate stability delay margins for various values of PI controller gains. The qualitative impact of EV aggregator on both stability regions and stability delay margins is thoroughly analyzed and the results are authenticated by time-domain simulations and quasi-polynomial mapping-based root finder (QPmR) algorithm.