TY - JOUR
T1 - Fast Low Frequency Fault Location and Section Identification Scheme for VSC-Based Multi-Terminal HVDC Systems
AU - Panahi, Habib
AU - Sanaye-Pasand, Majid
AU - Ashrafi Niaki, Seyed Hassan
AU - Zamani, Reza
N1 - Publisher Copyright:
IEEE
PY - 2022
Y1 - 2022
N2 - Penetration of DC networks is rapidly increasing in modern power systems. As transient behavior of DC grids is different from that of AC ones, AC grid protection schemes might not be applicable to protect DC networks. Exact fault location is vital for protection of DC networks to reduce repair cost and achieve fast power recovery. This paper proposes a novel topology independent multi-terminal DC scheme to identify fault section and location for DC transmission systems. Voltage and current signals measured at the terminals are analyzed by the least squares error (LSE) algorithm. Then, the proposed scheme uses low frequency components of the signals to locate DC faults offline. Unlike some other methods, it does not require sophisticated sensors and hardware to capture very high frequency content of the signals. Hence, the proposed scheme can be implemented in practice without additional measuring infrastructure. The performance of the proposed scheme is evaluated under various fault conditions for different topologies of DC networks in both overhead lines and cables. Numerous simulations carried out demonstrate that the proposed scheme is quite accurate and provides excellent performance under different fault resistances, sections, and locations.
AB - Penetration of DC networks is rapidly increasing in modern power systems. As transient behavior of DC grids is different from that of AC ones, AC grid protection schemes might not be applicable to protect DC networks. Exact fault location is vital for protection of DC networks to reduce repair cost and achieve fast power recovery. This paper proposes a novel topology independent multi-terminal DC scheme to identify fault section and location for DC transmission systems. Voltage and current signals measured at the terminals are analyzed by the least squares error (LSE) algorithm. Then, the proposed scheme uses low frequency components of the signals to locate DC faults offline. Unlike some other methods, it does not require sophisticated sensors and hardware to capture very high frequency content of the signals. Hence, the proposed scheme can be implemented in practice without additional measuring infrastructure. The performance of the proposed scheme is evaluated under various fault conditions for different topologies of DC networks in both overhead lines and cables. Numerous simulations carried out demonstrate that the proposed scheme is quite accurate and provides excellent performance under different fault resistances, sections, and locations.
KW - Current measurement
KW - Fault currents
KW - Fault location
KW - HVDC transmission
KW - hybrid AC/DC systems
KW - least squares error (LSE)
KW - multi-terminal DC (MTDC) network
KW - Network topology
KW - Topology
KW - Transmission line measurements
KW - voltage source converter (VSC)
UR - http://www.scopus.com/inward/record.url?scp=85114611216&partnerID=8YFLogxK
U2 - 10.1109/TPWRD.2021.3107513
DO - 10.1109/TPWRD.2021.3107513
M3 - Journal article
AN - SCOPUS:85114611216
SN - 0885-8977
VL - 37
SP - 2220
EP - 2229
JO - IEEE Transactions on Power Delivery
JF - IEEE Transactions on Power Delivery
IS - 3
ER -