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<p>The capacitive current compensation during single-phase ground faults (SPGFs) has been a longstanding challenge in electrical engineering. In Russia, 6 – 35 kV power networks distribute nearly half of the generated electrical energy, with SPGFs being the most common type of fault in these networks, accounting for up to 90% of all faults [1]. These faults often lead to disruptions in power supply to consumers. Therefore, it is essential that the methodologies to address SPGFs be developed in order to improve the reliability of power supply systems. This paper presents a brief review on existing and effective methods for compensating capacitive currents, with a focus on the conventional approach of installing an arc suppression coil (Petersen coil) in the neutral of a neutral-forming transformer (NFT). In addition, a method is proposed, which involves the iterative current rise in a controlled current source connected to the transformer neutral. Computational experiments demonstrate that this approach ensures arc suppression at the site of single-phase ground faults in isolated neutral systems.</p>

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Active Capacitive Current Compensation during Single-Phase Ground Faults in Isolated Neutral Systems

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • S. G. Tiguntsev,
  • N. A. Vishnyakov,
  • K. V. Shafarevich

摘要

The capacitive current compensation during single-phase ground faults (SPGFs) has been a longstanding challenge in electrical engineering. In Russia, 6 – 35 kV power networks distribute nearly half of the generated electrical energy, with SPGFs being the most common type of fault in these networks, accounting for up to 90% of all faults [1]. These faults often lead to disruptions in power supply to consumers. Therefore, it is essential that the methodologies to address SPGFs be developed in order to improve the reliability of power supply systems. This paper presents a brief review on existing and effective methods for compensating capacitive currents, with a focus on the conventional approach of installing an arc suppression coil (Petersen coil) in the neutral of a neutral-forming transformer (NFT). In addition, a method is proposed, which involves the iterative current rise in a controlled current source connected to the transformer neutral. Computational experiments demonstrate that this approach ensures arc suppression at the site of single-phase ground faults in isolated neutral systems.