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In order to cope with global climate challenges and the depletion of fossil energy, the penetration rate of asynchronous power sources has gradually increased, resulting in further reduction of system inertia. Insufficient inertia leads to reduced frequency support capability and causes frequency security issues. Evaluating the minimum inertia requirement of the power system has become an urgent engineering issue that needs to be resolved. Therefore, an assessment method for minimum inertia requirements is proposed. Firstly, comprehensively consider the frequency response process of the power system and establish the frequency response simulation model that considers the detailed control blocks of primary frequency modulation and frequency limit control. By analyzing frequency simulation indices, an iteration-based minimum inertia requirement assessment method considering frequency security constraints is proposed, and two correction methods with frequency index offsets are proposed. The effectiveness of the proposed method is verified by evaluating the minimum inertia requirement and the inertia abundance of the IEEE-39 system.

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An Iteration-Based Minimum Inertia Requirement Assessment Method Considering Frequency Security Constraints

  • 会议论文

  • 发表日期：

    2025年

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  • Hongxin Li,
  • Yanting Wang,
  • Chen Gong,
  • Ziqiang Wang,
  • Shichen Zhou,
  • Yunfeng Wen

摘要

In order to cope with global climate challenges and the depletion of fossil energy, the penetration rate of asynchronous power sources has gradually increased, resulting in further reduction of system inertia. Insufficient inertia leads to reduced frequency support capability and causes frequency security issues. Evaluating the minimum inertia requirement of the power system has become an urgent engineering issue that needs to be resolved. Therefore, an assessment method for minimum inertia requirements is proposed. Firstly, comprehensively consider the frequency response process of the power system and establish the frequency response simulation model that considers the detailed control blocks of primary frequency modulation and frequency limit control. By analyzing frequency simulation indices, an iteration-based minimum inertia requirement assessment method considering frequency security constraints is proposed, and two correction methods with frequency index offsets are proposed. The effectiveness of the proposed method is verified by evaluating the minimum inertia requirement and the inertia abundance of the IEEE-39 system.