Open AccessLoad pattern‐based voltage stability analysis in unbalanced distribution networks considering maximum penetration level of distributed generation
Author(s) -
Kazeminejad Mohammad,
Banejad Mahdi,
Annakkage Udaya Deepa,
Hosseinzadeh Nasser
Publication year - 2020
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
eISSN - 1752-1424
pISSN - 1752-1416
DOI - 10.1049/iet-rpg.2019.1196
Subject(s) - distributed generation , electric power system , voltage , ac power , control theory (sociology) , transmission system , node (physics) , stability (learning theory) , penetration (warfare) , power (physics) , computer science , transmission (telecommunications) , electronic engineering , engineering , electrical engineering , telecommunications , renewable energy , structural engineering , physics , control (management) , quantum mechanics , artificial intelligence , machine learning , operations research
Stability analysis in the power system is becoming more important than ever as more distributed energy resources penetrate in the system. This study presents a novel load pattern voltage stability index (LP VSI ) applicable to transmission and distribution systems. By considering the nominal value of voltages, the power network is converted into a two‐bus equivalent system. Then, LP VSI is derived by only the real‐time measurement of the voltage and deviation of active and reactive power loads. Also, the assessment of distributed generation's penetration level on unbalanced systems, with maximum loadability and power loss reduction constraints, is performed with regard to daily load variations. The accuracy and efficiency of the proposed indicator are tested on an unbalanced 34‐node radial distribution system. Obtained results in comparison with some other papers in the literature demonstrate that the proposed voltage stability index is fast and effective in identifying non‐trivial instabilities in the power system networks.