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:2022:10.1109/TPWRS.2022.3179143,
author = {Zhu, Y and Gu, Y and Li, Y and Green, T},
doi = {10.1109/TPWRS.2022.3179143},
journal = {IEEE Transactions on Power Systems},
pages = {1642--1654},
title = {Impedance-based root-cause analysis: comparative study of impedance models and calculation of eigenvalue sensitivity},
url = {http://dx.doi.org/10.1109/TPWRS.2022.3179143},
volume = {38},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Impedance models of power systems are useful when state-space models of apparatus such as inverter-based resources (IBRs) have not been made available and instead only black-box impedance models are available. For tracing the root causes of poor damping and tuning modes of the system, the sensitivity of the modes to components and parameters are needed. The so-called critical admittance-eigenvalue sensitivity based on nodaladmittance model has provided a partial solution but omits meaningful directional information. The alternative whole-system impedance model yields participation factors of shunt-connected apparatus with directional information that allows separate tuning for damping and frequency, yet do not cover series-connected components. This paper formalises the relationships between the two forms of impedance models and between the two forms of root-cause analysis. The calculation of system eigenvaluesensitivity in impedance models is further developed, which fills the gaps of previous research and establishes a complete theory of impedance-based root-cause analysis. The theoretical relationships and the tuning of parameters have been illustrated with a three-node passive network, a modified IEEE 14-bus network and a modified NETS-NYPS 68-bus network, showing that tools can be developed for tuning of IBR-rich power systemswhere only black-box impedance models are available.
AU  - Zhu,Y
AU  - Gu,Y
AU  - Li,Y
AU  - Green,T
DO  - 10.1109/TPWRS.2022.3179143
EP  - 1654
PY  - 2022///
SN  - 0885-8950
SP  - 1642
TI  - Impedance-based root-cause analysis: comparative study of impedance models and calculation of eigenvalue sensitivity
T2  - IEEE Transactions on Power Systems
UR  - http://dx.doi.org/10.1109/TPWRS.2022.3179143
UR  - https://ieeexplore.ieee.org/abstract/document/9785718
UR  - http://hdl.handle.net/10044/1/97635
VL  - 38
ER  -
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