TY - GEN
T1 - Stability region estimation under low voltage ride through constraints using sum of squares
AU - Mishra, Chetan
AU - Thorp, James S.
AU - Centeno, Virgilio A.
AU - Pal, Anamitra
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/11/13
Y1 - 2017/11/13
N2 - The increasing penetration of inverter based renewable generation (RG) in the form of solar photo-voltaic (PV) or wind has introduced numerous operational challenges and uncertainties. According to the standards [1], [2], these generators are made to trip offline if their operating requirements are not met. In an RG-rich system, this might alter the system dynamics and/or cause shifting of the equilibrium points to the extent that a cascaded tripping scenario is manifested. The present work attempts at avoiding such scenarios by estimating the constrained stability region (CSR) inside which the system must operate using maximal level set of a Lyapunov function estimated through sum of squares (SOS) technique. A time-independent conservative approximation of the LVRT constraint is initially derived for a classical model of the power system. The proposed approach is eventually validated by evaluating the stability of a 3 machine test system with trip-able RG.
AB - The increasing penetration of inverter based renewable generation (RG) in the form of solar photo-voltaic (PV) or wind has introduced numerous operational challenges and uncertainties. According to the standards [1], [2], these generators are made to trip offline if their operating requirements are not met. In an RG-rich system, this might alter the system dynamics and/or cause shifting of the equilibrium points to the extent that a cascaded tripping scenario is manifested. The present work attempts at avoiding such scenarios by estimating the constrained stability region (CSR) inside which the system must operate using maximal level set of a Lyapunov function estimated through sum of squares (SOS) technique. A time-independent conservative approximation of the LVRT constraint is initially derived for a classical model of the power system. The proposed approach is eventually validated by evaluating the stability of a 3 machine test system with trip-able RG.
KW - Constrained stability region (CSR)
KW - direct methods
KW - low voltage ride through (L VRT)
KW - sum of squares (SOS)
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U2 - 10.1109/NAPS.2017.8107353
DO - 10.1109/NAPS.2017.8107353
M3 - Conference contribution
AN - SCOPUS:85040545604
T3 - 2017 North American Power Symposium, NAPS 2017
BT - 2017 North American Power Symposium, NAPS 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2017 North American Power Symposium, NAPS 2017
Y2 - 17 September 2017 through 19 September 2017
ER -