TY - JOUR
T1 - A Robust Circuit and Controller Parameters Identification Method of Grid-Connected Voltage Source Converters Using Vector Fitting Algorithm
AU - Zhou, Weihua
AU - E. Torres-Olguin, Raymundo
AU - Goethner, Fredrid
AU - Beerten, Jef
AU - Karbalaye Zadeh, Mehdi
AU - Wang, Yanbo
AU - Chen, Zhe
PY - 2022/6/1
Y1 - 2022/6/1
N2 - This article presents a vector fitting (VF) algorithm-based robust circuit and controller parameters identification method for grid-connected voltage source converters (VSCs). The dq-domain impedance frequency responses (IFRs) of the VSCs are first measured using frequency scanning method, based on which the corresponding measured phasor-domain IFRs are calculated. Then, polynomial transfer functions are generated by applying the VF algorithm on the measured phasor-domain IFRs, from which the circuit and controller parameters, i.e., LCL filter parameters, digital sampling time, current controller parameters, and phase-locked loop parameters, are identified. Influence of measurement noise on parameters identification accuracy and corresponding countermeasure to mitigate the adverse influence are also theoretically investigated. The proposed method is able to identify the circuit and controller parameters, when detailed parameters are missing due to industrial secrecy or parameters variation caused by operating condition change, temperature fluctuation, or aging. Effectiveness of the proposed circuit and controller parameters identification method is validated by theoretical demonstration, OPAL-RT-based real-time simulation, and experimental validation.
AB - This article presents a vector fitting (VF) algorithm-based robust circuit and controller parameters identification method for grid-connected voltage source converters (VSCs). The dq-domain impedance frequency responses (IFRs) of the VSCs are first measured using frequency scanning method, based on which the corresponding measured phasor-domain IFRs are calculated. Then, polynomial transfer functions are generated by applying the VF algorithm on the measured phasor-domain IFRs, from which the circuit and controller parameters, i.e., LCL filter parameters, digital sampling time, current controller parameters, and phase-locked loop parameters, are identified. Influence of measurement noise on parameters identification accuracy and corresponding countermeasure to mitigate the adverse influence are also theoretically investigated. The proposed method is able to identify the circuit and controller parameters, when detailed parameters are missing due to industrial secrecy or parameters variation caused by operating condition change, temperature fluctuation, or aging. Effectiveness of the proposed circuit and controller parameters identification method is validated by theoretical demonstration, OPAL-RT-based real-time simulation, and experimental validation.
KW - Impedance frequency responses
KW - parameters identification
KW - polynomial transfer function
KW - vector fitting algorithm
KW - voltage source converter
KW - Current control
KW - Current measurement
KW - Transfer functions
KW - Converters
KW - Impedance
KW - Power conversion
KW - Phase locked loops
UR - http://www.scopus.com/inward/record.url?scp=85100950518&partnerID=8YFLogxK
U2 - 10.1109/JESTPE.2021.3059568
DO - 10.1109/JESTPE.2021.3059568
M3 - Journal article
SN - 2168-6777
VL - 10
SP - 2748
EP - 2763
JO - I E E E Journal of Emerging and Selected Topics in Power Electronics
JF - I E E E Journal of Emerging and Selected Topics in Power Electronics
IS - 3
ER -