Modified Orca Algorithm Based on the Navigation Behavior for Optimal Unit Commitment in Power Systems

Authors

  • Lilis Widayanti Universitas Negeri Malang
  • Arif Nur Afandi Universitas Negeri Malang
  • Heru Wahyu Herwanto Universitas Negeri Malang

DOI:

https://doi.org/10.12928/biste.v7i3.13645

Keywords:

Metaheuristic Optimization, Unit Commitment, Orca Algorithm, Power System, Economic Dispatch

Abstract

This study presents the Novel Navigation Orca Algorithm (NNOA), an innovative optimization algorithm derived from Orca Algorithm (OA). NNOA addresses the unit commitment (UC), a complex issue in power systems that focuses on scheduling generator units to meet power demand while taking into account each generator's limitations, with the goal of lowering operating costs and gas emissions. NNOA exhibits orca hunting behavior through echolocation, utilizing the Doppler effect principle to promote adaptive movement and circumvent local optima, as in contrast to OA's wave-based exploration. The algorithm was evaluated utilizing IEEE 30-bus system data, focused on the Integrated Economic and Emission Dispatch (IEED) objective. The performance was evaluated against OA and Particle Swarm Optimization (PSO) through convergence analysis over 10 and 30 trials, each consisting of 100 iterations. NNOA decreased the IEED value by 1.33% in regard to OA and 1.51% in regard to PSO. NNOA achieved convergence in 10 iterations, whereas OA required 35, indicating 71.4% faster convergence rate. Wilcoxon rank-sum tests demonstrated significant differences between NNOA, OA, and PSO pairings. NNOA's per-iteration computation time exceeds the time needed by PSO, but it remains economical and profitable. Significantly, NNOA contributes minimizing the fuel consumption and emissions cost, which has a positive environmental impact. It effectively adheres to the required constraints, which include the hourly power demand and generator output limits. Future research is encouraged to apply NNOA to larger-scale power systems and explore its hybridization with PSO to enhance computational efficiency, result consistency, and robustness in practical grid operations.

Author Biographies

Lilis Widayanti, Universitas Negeri Malang

Lilis Widayanti is a lecturer in the Computer Systems Study Program at Institut Teknologi dan Bisnis Asia Malang (ITB Asia), Indonesia. She has held the position of lecturer at Institut Teknologi dan Bisnis Asia, Indonesia, since 2015. Currently, her Doctorate (S3) in Electrical Engineering and Informatics is being pursued at Universitas Negeri Malang, Indonesia. She can be contacted at the email address lilis.widayanti.2205349@students.um.ac.id.

Arif Nur Afandi, Universitas Negeri Malang

Arif Nur Afandi is a Professor at Universitas Negeri Malang, Indonesia, and is presently the Vice Rector IV of the University. He earned his bachelor's degree from Universitas Brawijaya, Indonesia, his master's degree from Universitas Gajah Mada, Indonesia, and his Ph.D. from Kumamoto University, Japan. He has made substantial contributions to electrical engineering research and publications, and is an active member of IEEE organizations. His areas of expertise include renewable energy and power systems. He can be contacted at the email address an.afandi@um.ac.id

Heru Wahyu Herwanto, Universitas Negeri Malang

Heru Wahyu Herwanto is a lecturer at the State University of Malang specializing in education, informatics, image processing, and artificial intelligence. He obtained his undergraduate degree from Universitas Negeri Malang, Indonesia, followed by a master's degree in Computer Science from Universitas Brawijaya, Indonesia, and a PhD degree in Computer Science from Universitas Negeri Malang, Indonesia. He engages in research and scholarly publishing, focusing on the advancement of educational technology and the use of artificial intelligence across diverse domains. He can be contacted at the email address heru_wh@um.ac.id

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2025-09-03

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[1]
L. Widayanti, A. N. Afandi, and H. W. Herwanto, “Modified Orca Algorithm Based on the Navigation Behavior for Optimal Unit Commitment in Power Systems”, Buletin Ilmiah Sarjana Teknik Elektro, vol. 7, no. 3, pp. 450–467, Sep. 2025.

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