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<p>The increasing integration of renewable energy sources (RES) into power systems raises extensive challenges for power system operators to ensure grid stability, especially due to the reduced inertia associated with these sources. Therefore, it is essential to estimate power system inertia continuously to monitor and control power system dynamics. Traditionally, several methods were being adopted to estimate power system inertia based on frequency measurements which has its own assumptions and limitations. This paper presents a novel innovative approach to estimate online system inertia by using bus voltage phase angle measured from Phasor measurement units along with fuzzy logic estimator. The proposed method has been tested on IEEE nine bus system and Kundur’s two area system modified with PV farms. Simulations have been carried out with OPAL RT real time simulator in HYPERSIM environment. The results of the proposed method estimate the power system inertia with 99.98% - 96.13% accuracy.</p>

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Voltage Angle Based Power System Inertia Estimation Using Synchrophasor Technology

  • 期刊论文

  • 发表日期：

    2025年6月12日

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  • Nitisha Sudhir Darwade,
  • S.T. Nagarajan

摘要

The increasing integration of renewable energy sources (RES) into power systems raises extensive challenges for power system operators to ensure grid stability, especially due to the reduced inertia associated with these sources. Therefore, it is essential to estimate power system inertia continuously to monitor and control power system dynamics. Traditionally, several methods were being adopted to estimate power system inertia based on frequency measurements which has its own assumptions and limitations. This paper presents a novel innovative approach to estimate online system inertia by using bus voltage phase angle measured from Phasor measurement units along with fuzzy logic estimator. The proposed method has been tested on IEEE nine bus system and Kundur’s two area system modified with PV farms. Simulations have been carried out with OPAL RT real time simulator in HYPERSIM environment. The results of the proposed method estimate the power system inertia with 99.98% - 96.13% accuracy.