Selectively coordinated overcurrent protection for power systems
Session
Energy Efficiency Engineering
Description
The power system of Kosovo is a compact and integrated structure in hierarchical aspect. It plays an important role in the process of transmission and distribution energy to the consumers. Based on this importance analysis is necessary in order to estimate the medium and long term plans of production of electric energy and development of the power generation plants.
The connection of wind farm the topology of distribution network, which will lead to the change of current detected by relay protection, and the sensitivity and scope of protection will be affected.
Selective earth fault protection are an important task for operation, reliability and supply security in distribution systems. Since, the single line to earth faults are the most common fault type in power networks, much attention must be paid in earth faults issues. By the increase in the power consumption, stricter voltage quality limits and load diversity, distribution systems become more complex than traditional systems. The main reasons of this complexity can be listed as; embedded generation, underground cable usage, different neutral earthing practice, different parallel feeders’ numbers and loop formations in primary feeders. These features require re-evaluation of classical nondirectional over-current protection and coordination habits.
The large number of protection devices which spread on the network makes the protection systems study and review it difficult especially manually because it needs long time and much effort, because these settings must be coordinated among a lot of protection devices on the entire network. The major issue is the contribution of the whole system to the faulty point.
The goal of this paper is to review the existing protection and coordination, evaluate the sensitivity and selectivity of the protection system across the network and implement new coordination with the proper setting by using ETAP
Keywords:
Connection, Wind power plant, Protection, Selectivity, Short circuit current, Improvement, Power system
Proceedings Editor
Edmond Hajrizi
ISBN
978-9951-550-50-5
Location
UBT Kampus, Lipjan
Start Date
29-10-2022 12:00 AM
End Date
30-10-2022 12:00 AM
DOI
10.33107/ubt-ic.2022.139
Recommended Citation
Shaqiri, Rexhep, "Selectively coordinated overcurrent protection for power systems" (2022). UBT International Conference. 140.
https://knowledgecenter.ubt-uni.net/conference/2022/all-events/140
Selectively coordinated overcurrent protection for power systems
UBT Kampus, Lipjan
The power system of Kosovo is a compact and integrated structure in hierarchical aspect. It plays an important role in the process of transmission and distribution energy to the consumers. Based on this importance analysis is necessary in order to estimate the medium and long term plans of production of electric energy and development of the power generation plants.
The connection of wind farm the topology of distribution network, which will lead to the change of current detected by relay protection, and the sensitivity and scope of protection will be affected.
Selective earth fault protection are an important task for operation, reliability and supply security in distribution systems. Since, the single line to earth faults are the most common fault type in power networks, much attention must be paid in earth faults issues. By the increase in the power consumption, stricter voltage quality limits and load diversity, distribution systems become more complex than traditional systems. The main reasons of this complexity can be listed as; embedded generation, underground cable usage, different neutral earthing practice, different parallel feeders’ numbers and loop formations in primary feeders. These features require re-evaluation of classical nondirectional over-current protection and coordination habits.
The large number of protection devices which spread on the network makes the protection systems study and review it difficult especially manually because it needs long time and much effort, because these settings must be coordinated among a lot of protection devices on the entire network. The major issue is the contribution of the whole system to the faulty point.
The goal of this paper is to review the existing protection and coordination, evaluate the sensitivity and selectivity of the protection system across the network and implement new coordination with the proper setting by using ETAP