TY - JOUR
T1 - High-Frequency Fault Analysis-Based Pilot Protection Scheme for a Distribution Network With High Photovoltaic Penetration
AU - Zheng, Xiaodong
AU - Chao, Chenxu
AU - Weng, Yang
AU - Ye, Hai
AU - Liu, Zhongping
AU - Gao, Piao
AU - Tai, Nengling
N1 - Funding Information:
This work was supported in part by the Research Grants Council of Hong Kong SAR under Grant 17209419; in part by the National Natural Science Foundation of China (NSFC) under Grant 52177118; and in part by the U.S. Department of Energy s (EERE) through the Solar Energy Technology Office (SETO) under Award DE-EE0009339.
Publisher Copyright:
© 2010-2012 IEEE.
PY - 2023/1/1
Y1 - 2023/1/1
N2 - Due to the influence of inverter control, the short-circuit current provided by distributed photovoltaics (PVs) exhibits new characteristics, such as a controlled amplitude and phase angle, resulting in the malfunction of the current protection and differential protection of distribution networks with high PV penetration. In this paper, the equivalent high-frequency impedance model (EHFIM) of PV power generation and the analysis method of a fault high-frequency superimposed network are proposed. On this basis, we analyze the fault high-frequency superimposed network of a distribution network with high PV penetration and propose a high-frequency fault analysis-based pilot protection scheme, in which the range of frequency employed for protection (FEP) is analyzed theoretically. By comparing the relationship between the high-frequency operating impedance and the high-frequency restraining impedance, the internal and external faults are identified. The proposed protection scheme has the advantages of a fast trip, low requirement for data synchronization, immunity to inverter control and the PV operation mode, and adaptability to lines with teed feeders. The experimental results show that the proposed protection scheme can accurately identify internal and external three-phase, two-phase, and two-phase grounding faults and is resistant to both fault resistance and noise interference.
AB - Due to the influence of inverter control, the short-circuit current provided by distributed photovoltaics (PVs) exhibits new characteristics, such as a controlled amplitude and phase angle, resulting in the malfunction of the current protection and differential protection of distribution networks with high PV penetration. In this paper, the equivalent high-frequency impedance model (EHFIM) of PV power generation and the analysis method of a fault high-frequency superimposed network are proposed. On this basis, we analyze the fault high-frequency superimposed network of a distribution network with high PV penetration and propose a high-frequency fault analysis-based pilot protection scheme, in which the range of frequency employed for protection (FEP) is analyzed theoretically. By comparing the relationship between the high-frequency operating impedance and the high-frequency restraining impedance, the internal and external faults are identified. The proposed protection scheme has the advantages of a fast trip, low requirement for data synchronization, immunity to inverter control and the PV operation mode, and adaptability to lines with teed feeders. The experimental results show that the proposed protection scheme can accurately identify internal and external three-phase, two-phase, and two-phase grounding faults and is resistant to both fault resistance and noise interference.
KW - High photovoltaic penetration
KW - fault superimposed network
KW - high-frequency fault analysis-based protection
KW - pilot protection
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U2 - 10.1109/TSG.2022.3203392
DO - 10.1109/TSG.2022.3203392
M3 - Article
AN - SCOPUS:85137862224
SN - 1949-3053
VL - 14
SP - 302
EP - 314
JO - IEEE Transactions on Smart Grid
JF - IEEE Transactions on Smart Grid
IS - 1
ER -