TY - GEN
T1 - A More Realistic AC-QSS Cascading Failure Model with Decentralized UVLS and Centralized RAS
AU - Gharebaghi, Sina
AU - Vennelaganti, Sai Gopal
AU - Chaudhuri, Nilanjan Ray
AU - He, Ting
AU - Porta, Thomas La
N1 - Funding Information:
Financial support from NSF Grant Award ECCS 1836827 is gratefully acknowledged.
Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - Currently, the divergence problem of AC-Quasi-Steady-State (QSS) cascading failure models is addressed by uniform load shedding (ULS) that trips load in same fraction at all buses till convergence is achieved. However, in reality there exist pre-designed undervoltage load shedding (UVLS) relays that shed load in the subset of buses where voltage descends bellow a threshold, thereby preventing voltage collapse. This might not be captured by ULS, which in turn leads the cascade propagation to a different path. We attack the problem by proposing a new AC-QSS model, which combines voltage magnitude and Q-V sensitivity to predict buses that have undergone UVLS tripping in reality. Moreover, we introduce a centralized AC optimal preventive control approach to alleviate cascade propagation. We use a simple AC-QSS model with ULS as benchmark to contrast results of UVLS model and further demonstrate the effectiveness of preventive control on IEEE 118-bus system and a 2383-bus Polish network.
AB - Currently, the divergence problem of AC-Quasi-Steady-State (QSS) cascading failure models is addressed by uniform load shedding (ULS) that trips load in same fraction at all buses till convergence is achieved. However, in reality there exist pre-designed undervoltage load shedding (UVLS) relays that shed load in the subset of buses where voltage descends bellow a threshold, thereby preventing voltage collapse. This might not be captured by ULS, which in turn leads the cascade propagation to a different path. We attack the problem by proposing a new AC-QSS model, which combines voltage magnitude and Q-V sensitivity to predict buses that have undergone UVLS tripping in reality. Moreover, we introduce a centralized AC optimal preventive control approach to alleviate cascade propagation. We use a simple AC-QSS model with ULS as benchmark to contrast results of UVLS model and further demonstrate the effectiveness of preventive control on IEEE 118-bus system and a 2383-bus Polish network.
UR - http://www.scopus.com/inward/record.url?scp=85124131925&partnerID=8YFLogxK
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U2 - 10.1109/PESGM46819.2021.9637881
DO - 10.1109/PESGM46819.2021.9637881
M3 - Conference contribution
AN - SCOPUS:85124131925
T3 - IEEE Power and Energy Society General Meeting
BT - 2021 IEEE Power and Energy Society General Meeting, PESGM 2021
PB - IEEE Computer Society
T2 - 2021 IEEE Power and Energy Society General Meeting, PESGM 2021
Y2 - 26 July 2021 through 29 July 2021
ER -
