TY - JOUR
T1 - Stability Analysis of Grid-Forming Converters Under DC-Side Current Limitation in Primary Frequency Response Regime
AU - Samanta, Sayan
AU - Chaudhuri, Nilanjan Ray
N1 - Funding Information:
This work was supported by NSF under Grant Award ECCS 1656983.
Publisher Copyright:
© 1969-2012 IEEE.
PY - 2022/7/1
Y1 - 2022/7/1
N2 - The Stability of grid-forming converters (GFCs) interfacing renewable resources in a power system with multiple synchronous generators (SGs) is studied in the context of primary frequency response. The GFCs are divided into two classes based on the control methods - class-A: droop control, dispatchable virtual oscillator control (dVOC), and virtual synchronous machine (VSM); and class-B: matching control. First, averaged phasor models of these GFC classes are developed, which can be seamlessly integrated with positive sequence fundamental frequency planning models. Next, simplified averaged models are derived to study the stability of the dc-link voltage of the GFCs under dc-side current limitation in a generic multimachine system during primary frequency response. To that end, sufficiency conditions for stability of both classes and that of instability for class-A GFCs are established. Finally, the proposed stability conditions are verified using detailed switched models of two small systems and phasor models of a 4-machine and a 16-machine IEEE benchmark systems.
AB - The Stability of grid-forming converters (GFCs) interfacing renewable resources in a power system with multiple synchronous generators (SGs) is studied in the context of primary frequency response. The GFCs are divided into two classes based on the control methods - class-A: droop control, dispatchable virtual oscillator control (dVOC), and virtual synchronous machine (VSM); and class-B: matching control. First, averaged phasor models of these GFC classes are developed, which can be seamlessly integrated with positive sequence fundamental frequency planning models. Next, simplified averaged models are derived to study the stability of the dc-link voltage of the GFCs under dc-side current limitation in a generic multimachine system during primary frequency response. To that end, sufficiency conditions for stability of both classes and that of instability for class-A GFCs are established. Finally, the proposed stability conditions are verified using detailed switched models of two small systems and phasor models of a 4-machine and a 16-machine IEEE benchmark systems.
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U2 - 10.1109/TPWRS.2021.3130226
DO - 10.1109/TPWRS.2021.3130226
M3 - Article
AN - SCOPUS:85120052684
SN - 0885-8950
VL - 37
SP - 3077
EP - 3091
JO - IEEE Transactions on Power Systems
JF - IEEE Transactions on Power Systems
IS - 4
ER -
