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| A measurement-based approach for powersystem instability early warning |
| Feifei Bai,Yong Liu,Yilu Liu,Kai Sun,Navin Bhatt,Alberto Del Rosso,Evangelos Farantatos,Xiaoru Wang |
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| Abstract: |
| Early warning of impending instability in a power system under disturbance conditions is important for preventing of
system collapse. A measurement-based approach is proposed to assess the potential power system transient instability
problem under cascading outages. Where a measurement-based index is obtained as the estimation accuracy of a linear
autoregressive exogenous (ARX) model to estimate the dynamic response of the power system and indicate the system
stability to some extent after a disturbance. The proposed approach was verified using a set of marginally stable cases in
a 179-bus WECC equivalent power system. Then the instability early warning threshold for this system is obtained as 0.44. |
| Key words: Autoregressive exogenous model, Accuracy index, Dynamic response estimation, Instability early warning,Measurement-based |
| DOI：10.1186/s41601-016-0014-0 |
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