Impact of Post-Fault Active Power Recovery of Photovoltaic Power Generation on Transient Stability

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  • Kawabe Kenichi
    Graduate School of Science and Engineering for Research, University of Toyama
  • Matsuda Issei
    Graduate School of Science and Engineering for Education, University of Toyama
  • Tanaka Kazuyuki
    Graduate School of Science and Engineering for Research, University of Toyama

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Other Title
  • 太陽光発電FRT要件における出力復帰特性が電力系統の過渡安定度に与える影響解析
  • タイヨウコウ ハツデン FRT ヨウケン ニ オケル シュツリョク フッキ トクセイ ガ デンリョク ケイトウ ノ カト アンテイド ニ アタエル エイキョウ カイセキ

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Abstract

Currently, Japanese grid codes require photovoltaic (PV) power generation systems to continue supplying power to the grid as soon as possible even if the systems temporarily stop their operation. Although the fault ride-through (FRT) capability was originally proposed for preventing a cascading frequency drop in the power system, the capability has the impact on other instability phenomena such as transient stability. In this study, we focus on the post-fault active power recovery of the PV systems. The impact of the recovery speed on the transient stability is investigated under different load conditions, static/dynamic load condition. Numerical examples are carried out for the one-machine one-load infinite-bus system, and the effects of the recovery speed are evaluated by equal area criterion and critical clearing time. As a result, we have found both desirable and undesirable effects on the transient stability depending on the load condition.

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