Anti-maloperation Study of Zero-sequence Directional Protection for Three Circuits on the Same Tower
- Yaru Dong, Hui Huang, Jieru Dong
- Corresponding Author
- Yaru Dong
Available Online March 2018.
- https://doi.org/10.2991/mecae-18.2018.90How to use a DOI?
- three circuits on the same tower, zero-sequence directional protection, zero-sequence voltage compensation, zero-sequence criterion, negative-sequence criterion
- Based on the limitation of zero-sequence voltage compensation of traditional zero-sequence directional protection principle, an improved anti-maloperation protection strategy is proposed. First of all, by analyzing the characteristics of zero-sequence component, zero-sequence protection principle and maloperation reason of three circuits on the same tower, it is found that zero-sequence voltage over-compensation will change the polarity of zero-sequence voltage and lead to protection maloperation. Considering that the negative-sequence components are not affected by the mutual inductance between lines, a method of introducing negative-sequence components and reducing compensation impedance is proposed, which can reduce the possibility of over-compensating greatly. Based on this, the improved zero-sequence directional protection anti-maloperation logic is constructed. When a longitudinal fault occurs on the line, this method can achieve the purpose of preventing maloperation accurately. Finally, the effectiveness and feasibility of the proposed method are verified by numerical simulation.
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - Yaru Dong AU - Hui Huang AU - Jieru Dong PY - 2018/03 DA - 2018/03 TI - Anti-maloperation Study of Zero-sequence Directional Protection for Three Circuits on the Same Tower BT - 2018 International Conference on Mechanical, Electronic, Control and Automation Engineering (MECAE 2018) PB - Atlantis Press UR - https://doi.org/10.2991/mecae-18.2018.90 DO - https://doi.org/10.2991/mecae-18.2018.90 ID - Dong2018/03 ER -