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<p>This study analyzes the impacts of newly commissioned 5 MW and 10 MW solar power plants (SPPs) on the Altai-Uliastai energy system’s steady-state operation with the following two main parts: long-term states and frequency stability. When studying the impact on the system’s steady state, high and low loads, and the generation of hydropower plants (HPPs) are assumed to be constant (unchanged) for 24 hours a day. In contrast, the generation of distributed SPPs is considered variable or changing, respectively. However, when studying the power system’s frequency stability, the case of non-inertia distributed SPPs being in parallel operation mode with the system and being disturbed is considered. It is also performed for short-circuit location and type-specific disturbances in the system for frequency stability and rate of change of frequency (RoCoF). In doing so, conclusions are drawn considering the cases of 20 %, 60 %, and 100 % generations of the SPPs. The power factory simulation program of Germany’s Digsilent, which is widely used internationally, was used to analyze the power system.</p>

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Analysis of newly commissioned solar power plants impacts on frequency stability of the Mongolian power grid: a case study on Altai-Uliastai energy system

  • 期刊论文

  • 发表日期：

    2025年4月3日

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  • Amarsaikhan Chuluun,
  • Sukhbat Anjaa,
  • Turmandakh Bat-Orgil,
  • Bavuudorj Ovgor,
  • Enkhsaikhan Erdenebat

摘要

This study analyzes the impacts of newly commissioned 5 MW and 10 MW solar power plants (SPPs) on the Altai-Uliastai energy system’s steady-state operation with the following two main parts: long-term states and frequency stability. When studying the impact on the system’s steady state, high and low loads, and the generation of hydropower plants (HPPs) are assumed to be constant (unchanged) for 24 hours a day. In contrast, the generation of distributed SPPs is considered variable or changing, respectively. However, when studying the power system’s frequency stability, the case of non-inertia distributed SPPs being in parallel operation mode with the system and being disturbed is considered. It is also performed for short-circuit location and type-specific disturbances in the system for frequency stability and rate of change of frequency (RoCoF). In doing so, conclusions are drawn considering the cases of 20 %, 60 %, and 100 % generations of the SPPs. The power factory simulation program of Germany’s Digsilent, which is widely used internationally, was used to analyze the power system.