TY - GEN
T1 - Overcurrent directional protection with PV system integration
AU - Cesar, Aloisio
AU - Abo-Al-Ez, Khaled M.
AU - Kahn, Mohamed Tariq
N1 - Publisher Copyright:
© 2019 cape peninsula university of technology.
PY - 2019/3
Y1 - 2019/3
N2 - In modern electric networks with Distributed Generation (DG) units the power flow is bidirectional, which makes the DG units contribute to power systems faults. This scenario causes variable short circuit current. The short-circuit current is variable due to the different penetration level of DG sources. When the number and capacity of the DG units increases, the coordination of the protective relays becomes more complex and challenging. It is required to accurately coordinate overcurrent directional relays to be able to discriminate and operate sequentially for faults in the protected zone, to avoid unnecessary trips. When the DG units are Photovoltaic (PV) systems, the problem is more complex since both the generation and the loads are variable. This paper presents case studies of overcurrent directional protection with different PV system penetration levels, using IEEE-9 bus test system. Relay settings are selected to ensure that the directional overcurrent relay trips selectively. DigSilent Power Factory software is used for modelling and simulations of the suggested operational scenarios.
AB - In modern electric networks with Distributed Generation (DG) units the power flow is bidirectional, which makes the DG units contribute to power systems faults. This scenario causes variable short circuit current. The short-circuit current is variable due to the different penetration level of DG sources. When the number and capacity of the DG units increases, the coordination of the protective relays becomes more complex and challenging. It is required to accurately coordinate overcurrent directional relays to be able to discriminate and operate sequentially for faults in the protected zone, to avoid unnecessary trips. When the DG units are Photovoltaic (PV) systems, the problem is more complex since both the generation and the loads are variable. This paper presents case studies of overcurrent directional protection with different PV system penetration levels, using IEEE-9 bus test system. Relay settings are selected to ensure that the directional overcurrent relay trips selectively. DigSilent Power Factory software is used for modelling and simulations of the suggested operational scenarios.
KW - Directional overcurrent relay
KW - Distributed generator
KW - Grid Integration
KW - Power Factory modelling
KW - PV system
UR - http://www.scopus.com/inward/record.url?scp=85068423844&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85068423844
T3 - Proceedings of the 27th International Conference on the Domestic Use of Energy, DUE 2019
SP - 2
EP - 7
BT - Proceedings of the 27th International Conference on the Domestic Use of Energy, DUE 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 27th International Conference on the Domestic Use of Energy, DUE 2019
Y2 - 25 March 2019 through 27 March 2019
ER -
