TY - JOUR
T1 - Harmonic Injection Based Distance Protection for Line with Converter-interfaced Sources
AU - Yang, Zhe
AU - Zhang, Qi
AU - Liao, Wenlong
AU - Bak, Claus Leth
AU - Chen, Zhe
PY - 2023/2/1
Y1 - 2023/2/1
N2 - Converter-interfaced renewable energy sour-ces are directly integrated into the power system using power electronics, so unique fault characteristics may lead to the maloperation of traditional distance relays. In this article, to deal with this issue, a harmonic injection-based distance protection method is proposed. The controllable harmonic current is injected without revising the controller structure, and the harmonic frequency and magnitude are determined according to the grid feature. Since the proportional integral cannot track the sine component without the static error, the actual frequency response will be deduced using the transfer function. On this basis, the harmonic impedance measured at the relay point can accurately reflect the fault distance due to the disappearance of the remote infeed, so the proposed method has a strong ability to withstand the fault resistance. Meanwhile, it only needs a few modifications to the phasor extraction method in original protection devices, so it is easy for engineering applications. Furthermore, typical fault ride through requirements can be still satisfied. Simulation results in PSCAD and real-time digital simulator verify the proposed method in different fault scenarios.
AB - Converter-interfaced renewable energy sour-ces are directly integrated into the power system using power electronics, so unique fault characteristics may lead to the maloperation of traditional distance relays. In this article, to deal with this issue, a harmonic injection-based distance protection method is proposed. The controllable harmonic current is injected without revising the controller structure, and the harmonic frequency and magnitude are determined according to the grid feature. Since the proportional integral cannot track the sine component without the static error, the actual frequency response will be deduced using the transfer function. On this basis, the harmonic impedance measured at the relay point can accurately reflect the fault distance due to the disappearance of the remote infeed, so the proposed method has a strong ability to withstand the fault resistance. Meanwhile, it only needs a few modifications to the phasor extraction method in original protection devices, so it is easy for engineering applications. Furthermore, typical fault ride through requirements can be still satisfied. Simulation results in PSCAD and real-time digital simulator verify the proposed method in different fault scenarios.
KW - Circuit faults
KW - Distance protection
KW - Harmonic analysis
KW - Impedance
KW - Impedance measurement
KW - Protective relaying
KW - Resistance
KW - Transmission line measurements
KW - fault ride through
KW - frequency response
KW - harmonic injection
KW - renewable energy sources
UR - http://www.scopus.com/inward/record.url?scp=85127037329&partnerID=8YFLogxK
U2 - 10.1109/TIE.2022.3159971
DO - 10.1109/TIE.2022.3159971
M3 - Journal article
SN - 0278-0046
VL - 70
SP - 1553
EP - 1564
JO - I E E E Transactions on Industrial Electronics
JF - I E E E Transactions on Industrial Electronics
IS - 2
ER -