三相変圧器の結線を自動的に考慮できる配電系統向け三相不平衡潮流計算手法の開発

カテゴリ: 論文誌(論文単位)

グループ名: 【B】電力・エネルギー部門

発行日: 2023/07/01

タイトル(英語): Development of a Three-Phase Power-Flow Calculation Method for Distribution Systems with Automatic Handling of Arbitrary Winding Connections of Transformers

著者名: Guilherme Cirilo Leandro（（一財）電力中央研究所 グリッドイノベーション研究本部 ENIC研究部門），野田　琢（（一財）電力中央研究所 グリッドイノベーション研究本部 ENIC研究部門）

著者名(英語): Guilherme Cirilo Leandro (ENIC Division, Grid Innovation Research Laboratory, Central Research Institute of Electric Power Industry), Taku Noda (ENIC Division, Grid Innovation Research Laboratory, Central Research Institute of Electric Power Industry)

キーワード: 潮流計算，配電系統，修正節点解析法，不動点反復法，三相不平衡　　power flow，distribution system，modified nodal analysis，fixed-point iteration，three-phase imbalance

要約(英語): Single-phase loads and photovoltaic generation cause three-phase imbalance in distribution systems, and prospective growth of normal chargers of electric vehicles may even increase the imbalance. The analysis of such unbalanced systems requires the three-phase power-flow calculation. Since existing methods require the admittance matrices of three-phase transformers, they must be derived for all possible winding connection patterns in advance to its computer-code implementation. This paper proposes a three-phase power-flow calculation method which formulates circuit equations using the modified nodal analysis, making it possible to automatically handle any winding connection. The power-flow constraints are then embedded into the circuit equations using a fixed-point iteration. Newton-Raphson, backward/forward sweep and fixed-point iteration methods are the existing three categories of solution methods. Newton-Raphson methods may show convergence problems due to the high R/X ratios of distribution lines. Backward/forward sweep methods cannot be used, because loops are temporarily formed in a distribution system during circuit switching. These justify the use of a fixed-point iteration. In this paper, the proposed method is validated by practical examples.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.143 No.7 （2023）

本誌掲載ページ: 435-445 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejpes/143/7/143_435/_article/-char/ja/