Imperial College London
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Professor Tim Green, FREng

Faculty of Engineering, Department of Electrical and Electronic Engineering

Academic Leader for Sustainability, Professor
 
 
 
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Contact

 

+44 (0)20 7594 6171t.green Website CV

 
 
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Location

 

1107EElectrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Zhu:2021:10.1109/TPWRS.2021.3088345,
author = {Zhu, Y and Gu, Y and Li, Y and Green, T},
doi = {10.1109/TPWRS.2021.3088345},
journal = {IEEE Transactions on Power Systems},
pages = {343--353},
title = {Participation analysis in impedance models: the grey-box approach for power system stability},
url = {http://dx.doi.org/10.1109/TPWRS.2021.3088345},
volume = {37},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - This paper develops a grey-box approach to small-signal stability analysis of complex power systems that facilitates root-cause tracing without requiring disclosure of the full details of the internal control structure of apparatus connected to the system. The grey-box enables participation analysis in impedance models, which is popular in power electronics and increasingly accepted in power systems for stability analysis. The Impedance participation factor is proposed and defined in terms of the residue of the whole-system admittance matrix. It is proved that, the so defined impedance participation factor equals the sensitivity of the whole-system eigenvalue with respect to apparatus impedance. The classic state participation factor is related to the impedance participation factor via a chain-rule. Based on the chain-rule, a three-layer grey-box approach, with three degrees of transparency, is proposed for root-cause tracing to different depths, i.e. apparatus, states, and parameters, according to the available information. The association of impedance participation factor with eigenvalue sensitivity points to the re-tuning that would stabilize the system. The impedance participation factor can be measured in the field or calculated from the black-box impedance spectra with little prior knowledge required.
AU  - Zhu,Y
AU  - Gu,Y
AU  - Li,Y
AU  - Green,T
DO  - 10.1109/TPWRS.2021.3088345
EP  - 353
PY  - 2021///
SN  - 0885-8950
SP  - 343
TI  - Participation analysis in impedance models: the grey-box approach for power system stability
T2  - IEEE Transactions on Power Systems
UR  - http://dx.doi.org/10.1109/TPWRS.2021.3088345
UR  - https://ieeexplore.ieee.org/document/9451617
UR  - http://hdl.handle.net/10044/1/90192
VL  - 37
ER  -
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