Personal profile
Biography
Dr Ratnam leads a research group in Power Systems & Optimization that focuses on both the theoretical and practical aspects of controlling renewable and distributed energy sources within power grids. Her overarching research thrust is to accelerate the energy transition and create a carbon-neutral power grid.
Dr Ratnam earned the BEng (Hons I) degree in Electrical Engineering in 2006, and the PhD degree in Electrical Engineering in 2016, from the University of Newcastle, Australia. She subsequently held postdoctoral research positions with the Center for Energy Research at the University of California San Diego, and at the University of California Berkeley in the California Institute for Energy and Environment (CIEE). During 2001–2012 she held various positions at Ausgrid, a utility that operates one of the largest electricity distribution networks in Australia. Dr Ratnam currently holds a Future Engineering Research Leader (FERL) Fellowship at ANU and is a Senior Lecturer in the ANU School of Engineering. She is a Senior Member of IEEE and a Fellow of Engineers Australia.
Qualifications
FIEAust CPEng
Research Interests
Power systems and control theory with a focus on smart grid design, uPMUs, solar PV, battery storage, EVs and the grid integration of renewables.
Research student supervision
- Registered to supervise
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Collaborations and top research areas from the last five years
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ADMM-based Coordinated Control of Electric Vehicles in an Unbalanced Distribution Grid: Assessing Tolerance to Communication Failures
Nimalsiri, N. & Ratnam, E., 2024, 2024 IEEE 34th Australasian Universities Power Engineering Conference, AUPEC 2024. Institute of Electrical and Electronics Engineers Inc., p. 1-6 6 p. (2024 IEEE 34th Australasian Universities Power Engineering Conference, AUPEC 2024).Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › peer-review
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A Nonlinear Negative-Imaginary Systems Framework with Actuator Saturation for Control of Electrical Power Systems
Chen, Y., Shi, K., Petersen, I. R. & Ratnam, E. L., 2024, 2024 European Control Conference, ECC 2024. Institute of Electrical and Electronics Engineers Inc., p. 2399-2404 6 p. (2024 European Control Conference, ECC 2024).Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › peer-review
5 Citations (Scopus) -
Competitive Equilibrium in Microgrids with Dynamic Loads
Salehi, Z., Chen, Y., Petersen, I. R., Ratnam, E. L. & Shi, G., 2024, 2024 American Control Conference, ACC 2024. Institute of Electrical and Electronics Engineers Inc., p. 1789-1794 6 p. (Proceedings of the American Control Conference).Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › peer-review
Open Access -
Design and Stability of Angle Based Feedback Control in Power Systems: A Negative-Imaginary Approach
Chen, Y., Petersen, I. R. & Ratnam, E. L., 2024, 2024 American Control Conference, ACC 2024. Institute of Electrical and Electronics Engineers Inc., p. 1158-1163 6 p. (Proceedings of the American Control Conference).Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › peer-review
Open Access2 Citations (Scopus) -
On the Stability of Networked Nonlinear Negative Imaginary Systems with Applications to Electrical Power Systems
Chen, Y., Shi, K., Petersen, I. R. & Ratnam, E. L., 1 Aug 2024, In: IFAC-PapersOnLine. 58, 17, p. 220-225 6 p.Research output: Contribution to journal › Conference article › peer-review
Open Access
Projects
- 5 Finished
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LE230100058: National Facility for Electricity Grid Security and Resilience Research
Ratnam, E. (PI), Blackhall, L. (CoI), Manchester, I. R. (CoI), Manchester, I. R. (CoI), Petersen, I. (CoI), Shames, I. (CoI), Shi, G. (CoI), Trumpf, J. (CoI), Varadharajan, V. (CoI), Verbic, G. (CoI), Verbic, G. (CoI), Weller, S. (CoI) & Zhu, J. (CoI)
1/09/23 → 30/08/25
Project: Research
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Facility for Energy Security and Resilience Research
Ratnam, E. (PI), Blackhall, L. (CoI), Kurniawati, H. (CoI), Mahony, R. (CoI), Petersen, I. (CoI), Shames, I. (CoI) & Yang, N. (CoI)
1/07/22 → 31/12/22
Project: Research
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Ext Led: Democratisation of Deep Learning: Neural Architecture Search at Low Cost
Halgamuge, S. (PI) & Ratnam, E. (PI)
1/01/22 → 30/12/24
Project: Research
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Global Research Partnership Scheme - Elizabeth Ratnam
Ratnam, E. (PI), Arnold, D. (CoI), Blackhall, L. (CoI), Callaway, D. (CoI), Elizondo, J. (CoI), Shaw, M. (CoI), Thiebaux, S. (CoI) & von Meier, A. (CoI)
1/11/19 → 1/11/20
Project: Research