Study of an interactive fuzzy multi-objective optimal power flow

Junji Kubokawa, Yoshito Okubo, Hiroshi Sasaki, Ryuichi Yokoyama

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)


    As the necessity of high-quality electric power supply increases, it has been required to develop sophisticated power system operations in which several requirements stemming from economy, security, and environmental aspects are simultaneously satisfied. In general, a problem of satisfying several noncommensurable criteria is called a multiobjective optimization problem. Although the most powerful means to obtain desirable system operations is optimal power flow (OPF), a straightforward application of the conventional OPF optimizes only one objective and the remaining objectives must be treated as constraints. However, since such objectives are in trade-off relationships with each other, it is necessary to develop an efficient multiobjective OPF. In this paper, we propose a solution method of multiobjective OPF by means of fuzzy coordination. In the first step, the degree of Decision Maker (DM) satisfaction on each objective would be maximized with a prespecified membership function. The membership function would be updated in accordance with the DM's preference information and target value of the objective function. The degree of satisfaction will be improved step by step by updating the membership functions. Finally, the satisficing solution for the DM would be obtained. The proposed method has been applied to the IEEE 57 and 118 test systems, producting successful results.

    Original languageEnglish
    Pages (from-to)59-67
    Number of pages9
    JournalElectrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
    Issue number1
    Publication statusPublished - 2000 Jan 15

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering


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