TY - JOUR
T1 - Probabilistic Analysis of Commutation Failure in LCC-HVDC System Considering the CFPREV and the Initial Fault Voltage Angle
AU - Yao, Wei
AU - Liu, Chang
AU - Fang, Jiakun
AU - Ai, Xiaomeng
AU - Wen, Jinyu
AU - Cheng, Shijie
PY - 2020/4
Y1 - 2020/4
N2 - This paper investigates the in-depth mechanism of commutation failure for a line-commuted converter-based high-voltage direct current (LCC-HVDC) system. The commutation failure prevention control (CFPREV) and the initial fault voltage angle (IFVA) are considered from the view of the voltage-time area (VTA) in the analysis. It is revealed that the IFVA is among the dominant factors for commutation failures when the voltage drop of the inverter bus is relatively small, and CFPREV further intensifies the impact of the IFVA on commutation failures, while the fluctuation of the direct current plays a dominant role in commutation failures under a greater voltage reduction at the inverter bus. A quantitative division of the severity of AC faults is proposed to determine dominant factors for commutation failures. The relationship between the chance of commutation failures to occur and the IFVA is built, and the method used for computing probability of commutation failures is proposed. The influence of the dynamic of CFPREV output on our research is studied. Simulations based on a typical monopole LCC-HVDC system using PSCAD/EMTDC software are conducted to verify the correctness of the theoretic analysis and the effectiveness of the proposed computing methods.
AB - This paper investigates the in-depth mechanism of commutation failure for a line-commuted converter-based high-voltage direct current (LCC-HVDC) system. The commutation failure prevention control (CFPREV) and the initial fault voltage angle (IFVA) are considered from the view of the voltage-time area (VTA) in the analysis. It is revealed that the IFVA is among the dominant factors for commutation failures when the voltage drop of the inverter bus is relatively small, and CFPREV further intensifies the impact of the IFVA on commutation failures, while the fluctuation of the direct current plays a dominant role in commutation failures under a greater voltage reduction at the inverter bus. A quantitative division of the severity of AC faults is proposed to determine dominant factors for commutation failures. The relationship between the chance of commutation failures to occur and the IFVA is built, and the method used for computing probability of commutation failures is proposed. The influence of the dynamic of CFPREV output on our research is studied. Simulations based on a typical monopole LCC-HVDC system using PSCAD/EMTDC software are conducted to verify the correctness of the theoretic analysis and the effectiveness of the proposed computing methods.
KW - Inverters
KW - Probabilistic logic
KW - Valves
KW - HVDC transmission
KW - Voltage control
KW - Computational modeling
KW - Analytical models
KW - Line-commuted converter
KW - high voltage direct current (HVDC)
KW - commutation failure
KW - commutation failure prevention control (CFPREV)
KW - initial fault voltage angle (IFVA)
KW - Line-commuted converter
KW - High voltage direct current (HVDC)
KW - Commutation failure
KW - Commutation failure prevention control (CFPREV)
KW - Initial fault voltage angle (IFVA)
UR - http://www.scopus.com/inward/record.url?scp=85083095464&partnerID=8YFLogxK
U2 - 10.1109/TPWRD.2019.2925399
DO - 10.1109/TPWRD.2019.2925399
M3 - Journal article
SN - 0885-8977
VL - 35
SP - 715
EP - 724
JO - IEEE Transactions on Power Delivery
JF - IEEE Transactions on Power Delivery
IS - 2
M1 - 8747540
ER -