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Inertia Energy-Based Required Capacity Calculation of BESS for Achieving Carbon Neutrality in Korean Power System

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  • Dong-Ju Chae

    (Department of Electrical Engineering, Jeonbuk National University, Jeonju-si 54896, Republic of Korea
    Electrical Safety Research Institute, Korea Electrical Safety Corporation, Wanju 55365, Republic of Korea)

  • Kyung Soo Kook

    (Department of Electrical Engineering, Jeonbuk National University, Jeonju-si 54896, Republic of Korea
    Smart Grid Research Center, Jeonbuk National University, Jeonju-si 54896, Republic of Korea)

Abstract

Frequency response performance in power systems is becoming vulnerable due to the transition toward the higher penetration of renewable energy such as achieving carbon neutrality. In particular, reducing power system inertia energy as the asynchronous generation increases could result in violating the frequency stability constraint when a disturbance occurs in the power systems. In order to control the rapidly fluctuating frequency of the power system with low inertia, it is necessary to introduce fast frequency response resources such as a Battery Energy Storage System (BESS). This paper proposes a method to calculate the required capacity of BESS for compensating the frequency control performance of the power system using inertia energy. For calculating the required capacity of BESS, the inertia energy in the critical power system, where frequency control performance marginally satisfies frequency stability constraint, should be calculated. Also, the inertia energy in the evaluated power system having deficit inertia energy should be calculated. By comparing power systems that respond with different dynamics when the same disturbance occurs, the proposed calculation corresponds to the ratio of inertia energy deficiency based on critical power system inertia energy within the power imbalance. Through various case studies employing Korean power systems, the effectiveness of the inertia energy-based calculation method for the required BESS is verified by the fact that the BESS integrated power system marginally satisfies the frequency stability constraint. In these study cases, it is found that the instant response of BESS is very effective for compensating the frequency control performance of the low inertia power system. By applying the proposed method, it is also found that about 840 MW of BESS can achieve carbon neutrality in the Korean power system.

Suggested Citation

  • Dong-Ju Chae & Kyung Soo Kook, 2024. "Inertia Energy-Based Required Capacity Calculation of BESS for Achieving Carbon Neutrality in Korean Power System," Energies, MDPI, vol. 17(8), pages 1-14, April.
  • Handle: RePEc:gam:jeners:v:17:y:2024:i:8:p:1843-:d:1374463
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    References listed on IDEAS

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    1. Woo Yeong Choi & Kyung Soo Kook & Ga Ram Yu, 2019. "Control Strategy of BESS for Providing Both Virtual Inertia and Primary Frequency Response in the Korean Power System," Energies, MDPI, vol. 12(21), pages 1-17, October.
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