TY - JOUR
T1 - A Control Method for Converter-interfaced Sources to Improve Operation of Directional Protection Elements
AU - Yang, Zhe
AU - Liu, Zhou
AU - Zhang, Qi
AU - Chen, Zhe
AU - Jesus Chavez, Jose de
AU - Popov, Marjan
PY - 2023/2/1
Y1 - 2023/2/1
N2 - The traditional fault control strategy of converter-interfaced renewable energy sources (CIRESs) may bring about a lower sensitivity level or misoperation of fault component-based directional elements. To overcome this problem, a new control scheme is proposed to adjust sequence impedance angles of CIRESs by computing suitable current references of the CIRES controller. Meanwhile, these current references are maximized by an iterative algorithm to make full use of the short-circuit capacity of CIRESs. The proposed control scheme is applicable to various faulty conditions such as different fault types, power factors, weak grids, and larger fault resistances. Compared with the new directional elements that need to update protection algorithms, the proposed control strategies can make CIRESs compatible with the existing directional elements whilst the necessary fault ride-through (FRT) requirements can still be satisfied. Furthermore, all the controller parameters are not required to be revised based on the detected fault type, even with only local measured data collected. The associated PSCAD simulations, real-time digital simulator (RTDS) testing and the downscale hardware experiment verify the proposed method.
AB - The traditional fault control strategy of converter-interfaced renewable energy sources (CIRESs) may bring about a lower sensitivity level or misoperation of fault component-based directional elements. To overcome this problem, a new control scheme is proposed to adjust sequence impedance angles of CIRESs by computing suitable current references of the CIRES controller. Meanwhile, these current references are maximized by an iterative algorithm to make full use of the short-circuit capacity of CIRESs. The proposed control scheme is applicable to various faulty conditions such as different fault types, power factors, weak grids, and larger fault resistances. Compared with the new directional elements that need to update protection algorithms, the proposed control strategies can make CIRESs compatible with the existing directional elements whilst the necessary fault ride-through (FRT) requirements can still be satisfied. Furthermore, all the controller parameters are not required to be revised based on the detected fault type, even with only local measured data collected. The associated PSCAD simulations, real-time digital simulator (RTDS) testing and the downscale hardware experiment verify the proposed method.
KW - Circuit faults
KW - Fault currents
KW - Impedance
KW - Power transmission lines
KW - Security
KW - Voltage control
KW - Voltage measurement
KW - converter-interfaced renewable energy sources
KW - directional elements
KW - fault ride through
KW - impedance angle
KW - Converter-interfaced renewable energy sources
UR - http://www.scopus.com/inward/record.url?scp=85137857881&partnerID=8YFLogxK
U2 - 10.1109/TPWRD.2022.3202988
DO - 10.1109/TPWRD.2022.3202988
M3 - Journal article
SN - 0885-8977
VL - 38
SP - 642
EP - 654
JO - I E E E Transactions on Power Delivery
JF - I E E E Transactions on Power Delivery
IS - 1
ER -