Scholarlink

The paper presents an optimized solution for overcurrent relay coordination (OCRC), incorporating the thermal damage curve of distribution lines in distribution networks integrated with distributed energy resources (DERs). The Quasi-Oppositional–Chaotic–Symbiotic Organisms Search algorithm (QOCSOS) is applied to shorten the operating time of primary relays while also widening the time buffer between secondary relay operation and the conductor’s thermal damage threshold. This solution enhances selective relay coordination while mitigating the potential risk of thermal damage to the lines, particularly effective for distribution networks with small conductor cross-sections and high fault currents. The proposed method is validated through simulations performed on a 20 kV distribution network consisting of 16 buses. The results demonstrate its effectiveness in strengthening distribution network protection, improving overall system reliability, and extending the service life of distribution lines. This approach is especially advantageous for modern networks with high DER penetration, offering a potential solution to current protection challenges.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Optimized Overcurrent Relay Coordination Incorporating Thermal Damage Curve in DER-Integrated Distribution Networks Using QOCSOS Algorithm

  • 会议论文

  • 发表日期：

    2026年

查看全文
  • Tuan Khanh Dang,
  • Nhat Huy Huynh,
  • Hoang Khoa Truong,
  • Ngoc Dieu Vo

摘要

The paper presents an optimized solution for overcurrent relay coordination (OCRC), incorporating the thermal damage curve of distribution lines in distribution networks integrated with distributed energy resources (DERs). The Quasi-Oppositional–Chaotic–Symbiotic Organisms Search algorithm (QOCSOS) is applied to shorten the operating time of primary relays while also widening the time buffer between secondary relay operation and the conductor’s thermal damage threshold. This solution enhances selective relay coordination while mitigating the potential risk of thermal damage to the lines, particularly effective for distribution networks with small conductor cross-sections and high fault currents. The proposed method is validated through simulations performed on a 20 kV distribution network consisting of 16 buses. The results demonstrate its effectiveness in strengthening distribution network protection, improving overall system reliability, and extending the service life of distribution lines. This approach is especially advantageous for modern networks with high DER penetration, offering a potential solution to current protection challenges.