Research Focus:

1. Green Hydrogen Energy Systems (Power-to-X)

2. Grid Forming Technology

3. Hybrid Grid Synchronization of Inverter 

4. Fault Ride Through of Grid-connected Inverters

5. Microgrid Control and Reliability

6. Power System Transient Stability Analysis.

7. Condition Monitoring and Preventive Maintenance of Power Apparatus.

On-going Research Projects:

Previous Projects:

1. Industry Project: Fulham DCDC coupled Generating Station (PV + Battery) GPS Studies as per AEMO Guidelines.

• Octopus pvt ltd. in Victoria, Australia is developing a DCDC coupled Solar with Battery storage system (80 MW Capacity at the POC) which is planned to be connected at the 66 kV terminal of AusNet sub-transmission network.

• I was working as a Power System Engineer in Aurecon Australasia Pty Ltd.

• We did the studies to assess compliance with the requirements of the NER and serve as inputs to the Generator Performance Standard (GPS) in R0 study scope. 

News: Successful Field Installation 

2. Post-Doctoral Project: On line Condition Monitoring and Preventive Maintenance of Medium Voltage Under-ground Cables in Dubai.

• We analysed the seasonal effect of Dubai on the condition of medium voltage underground cables as part of the project funded by the Dubai Electricity and Water Authority (DEWA).

• We proposed on line condition monitoring techniques such as measuring the PD detection using HFCT sensors mounted on the cable surface.

• We proposed to install thermocouples to monitor the thermal health of the cable online.

3. PhD Project: Hybrid Grid Synchronization and Enhanced Fault Ride-Through of Grid-connected Power Converter.

• We analysed the issues with the poor fault ride-through (FRT) of grid-connected power converter synchronized with conventional synchronous reference frame phase-locked loop (SRFPLL) during grid faults with phase-angle jumps (PAJs).

• We developed novel Hybrid Grid Synchronization transition scheme for three-phase power converters. 

• We developed enhanced frequency-adaptive single-phase grid synchronization technique. 

• We tested the FRT of power converters (up to 5 kW rating) with proposed synchronization principle using both simulation analysis and experimental validation. 

4. Research Project: Condition Monitoring and Preventive Maintenance of Power Plant in Singapore.

• A joint collaborative project between National University of Singapore (NUS) and SembCorp. Power Plant Singapore.

• I was working as a Research Engineer from NUS.

• Specific focus was given to detect the inter turn faults in Induction motor and Transformer as the critical power apparatus in the plant. 

• We designed a simulation prototype of the Induction motor in a completer power plant model based on the specifications given by the industry. 

• We proposed and analysed the inter turn fault detection in windings of Induction motor using co-simulation environment. 

• We analysed the impact of supply voltage and load current harmonics on the proposed fault detection technique. 

Research Team Members:

Current PhD students

1. Mr. Anjan Krishna AR, (August 2024-Present) 

2. Mr. Tejaswi M Timsani, (August 2024-Present) 

3. Mr. Hemsundar Jakula, (August 2023-Present) : Co-supervision with Prof. Pratyasa Bhui

Current MS students

1. Mr. Lipun Kumar Naik, (August 2024-Present) 

Graduated Students (2018-25)

1. Jack Benjamin, MS Student (August 2022-Jan 2025): Co-supervision with Prof. Pratyasa Bhui

Current position: Toshiba, India.

2. Cameron Jones, Undergraduate Thesis, UNSW, 2021: Co-supervision with Prof. Jayashri Ravishnkar. Current position: PhD candidate at UNSW, Australia.

3. Max Crittenden, Undergraduate Thesis, UNSW, 2019: Co-supervision with Prof. Jayashri Ravishnkar Current position: Graduate Electrical Engineer at APA Group, Brisbane, Australia.

4. Kuthsav Thattai, Post-graduate Thesis, UNSW, 2018: Co-supervision with Prof. Jayashri Ravishnkar 

Current position: PSCAD, Sydney, Australia.

Scientific Publications:

A. International Journals:

1. A. K. Sahoo, J. Ravishankar, C. Jones, “Phase-Locked Loop Independent Second-order Generalized Integrator for Single-phase Grid Synchronization”, IEEE Trans. Instrum. Meas., vol. 70, pp. 1-9, Aug. 2021. Read here 

2. A. K. Sahoo, K. Mahmud, J. Ravishankar, “An Enhanced Frequency-Adaptive Single-phase Grid Synchronization Technique”, IEEE Trans. Instrum. Meas., vol. 70, pp. 1-11, Apr. 2021. Read here 

3. A. K. Sahoo, J. Ravishankar, M. Ciobotaru and F. Blaabjerg, “Enhanced Fault Ride-through of Power Converters Using Hybrid Grid Synchronization”. IEEE J. Emerg. Sel. Top. Power Electron, 2021. Read here 

4. A. K. Sahoo, K. Mahmud, M. Crittenden, J. Ravishankar, S. Padmanaban and F. Blaabjerg, "Communication-less Primary and Secondary Control in Inverter-Interfaced AC Microgrid: An Overview," IEEE J. Emerg. Sel. Top. Power Electron., 2020. Read here 

5. A. Subramaniam, A. Sahoo, S. S. Manohar, S. J. Raman and S. K. Panda, "Switchgear Condition Assessment and Lifecycle Management: Standards, Failure Statistics, Condition Assessment, Partial Discharge Analysis, Maintenance Approaches, and Future Trends," IEEE Elect. Insul. Mag., vol. 37, no. 3, pp. 27-41, Jun. 2021. Read here 

6. K. Mahmud, A. K. Sahoo, J. Ravishankar, and Z. Y. Dong, “Coordinated multilayer control for energy management of grid-connected AC microgrids,” IEEE Trans. Ind. Appl., vol. 55, no. 6, pp. 7071–7081, Nov./Dec. 2019. Read here 

7. S. Lu, H. Chai, A. Sahoo and B. T. Phung, "Condition Monitoring Based on Partial Discharge Diagnostics Using Machine Learning Methods: A Comprehensive State-of-the-Art Review," IEEE Trans. Dielectr. and Electr. Insul., vol. 27, no. 6, pp. 1861-1888, Dec. 2020. Read here 

8. K. Mahmud, A. K. Sahoo, E. Fernandez, P. Sanjeevikumar and J. B. Holm-Nielsen, "Computational Tools for Modeling and Analysis of Power Generation and Transmission Systems of the Smart Grid," IEEE Systems Journal, vol. 14, no. 3, pp. 3641-3652, Sept. 2020. Read here 

9. S. Morsalin, A. Sahoo and B. T. Phung, "Recovery voltage response of XLPE cables based on polarisation and depolarisation current measurements," IET Gener. Transm. Distrib, vol. 13, no. 24, pp. 5533-5540, 17 12 2019. Read here 

10. M.T. Nazir, B.T. Phung, A. Sahoo, et al. Surface Discharge Behaviours, Dielectric and Mechanical Properties of EPDM based Nanocomposites containing Nano-BN. Appl Nanosci 9, 1981–1989 (2019).

11. A. Sahoo, R. Gautam, R. Vinu, R. Jayaganthan, and R. Sarathi, “Understanding the physico‐ chemical and surface discharge properties of epoxy silicon carbide nanocomposites”. Polym. Compos, 39: 3268-3279, 2018. Read here 

12. R. Sarathi, A. Sahoo, Y. Chen, Y. Cheng, and T. Tanaka, “Understanding surface discharge activity with epoxy silicon carbide nanocomposites”. Polym Eng Sci, 57: 1349-1355, 2017. Read here 

13. K. Mahmud and A. Sahoo, “Multistage energy management system using autoregressive moving average and artificial neural network for day-ahead peak shaving,” Electron. Lett., vol. 55, no. 15, pp. 853–855, Jul. 2019. Read here 

B. Selected International Conferences:

1. J. Benjamin, A. Sahoo, and P. Bhui, "Enhanced Fault Current Utilization by Grid-forming Inverter using Non-linear Transient Virtual Resistance during Symmetrical Faults", 23rd National Power Systems Conference (NPSC) 2024, Indore, India. (Accepted)

2. D S Alla, A. Sahoo, S. Negi, and Chandrasekaran S, "Linear Phase-locked Loop based Hybrid Grid Synchronization for Grid-Forming Inverters", 11th IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES) 2024, India. (Accepted)

3. R. Rama, P. Bhui, and  A. Sahoo, " Detailed Phasor Modelling of Grid Forming Proton Exchange Membrane (PEM) Electrolyzer Load", 23rd National Power Systems Conference (NPSC) 2024, Indore, India. (Accepted)

4. A. Sahoo, S. M. H. Rizvi and T. A. Naidu, "Robust Fault Ride Through of Grid-Connected Inverter using Hybrid Simulation Framework," 2022 IEEE PES 14th Asia-Pacific Power and Energy Engineering Conference (APPEEC), Melbourne, Australia, 2022, pp. 1-7 Read here 

5. A. Sahoo, J. Ravishankar, M. Ciobotaru and S. Padmanaban, "Improved Low Voltage Ride-Through Performance of Single-phase Power Converters using Hybrid Grid Synchronization," (IECON) 2020, The 46th Annual Conference of the IEEE Industrial Electronics Society, Singapore, 2020, pp. 3685-3690, Read here 

6. C. Jones, A. Sahoo, J. Ravishankar, I. Nikolakakos and T. Ghaoud, "Grid Fault Resilient Hybrid Grid Synchronization for Single-Phase Solar Inverter," 2022 IEEE 31st International Symposium on Industrial Electronics (ISIE), 2022, pp. 436-441. Read here 

7. A. Sahoo, A. Arunan, K. Mahmud, J. Ravishankar, M. S. H. Nizami and M. J. Hossain, "Teager-Huang based Fault Detection in Inverter-interfaced AC Microgrid," IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe), Genova, Italy, 2019, pp. 1-5. Read here 

8. M. Ali, A. Sahoo, H. I. Nurdin, J. Ravishankar and J. E. Fletcher, "On the Power Sharing Dynamics of Parallel-Connected Virtual Oscillator-Controlled and Droop-Controlled Inverters in an AC Microgrid," 45th Annual Conference of the IEEE Industrial Electronics Society (IECON), Lisbon, Portugal, 2019, pp. 3931-3936. Read here 

9. A. Sahoo, K. Mahmud, M. Ciobotaru and J. Ravishankar, "Adaptive Grid Synchronization Technique for Single-phase Inverters in AC Microgrid," IEEE Energy Conversion Congress and Exposition (ECCE), Baltimore, MD, USA, 2019, pp. 4441-4446. Read here 

Rest can be found here 

PhD Thesis: Improved Hybrid Techniques for Grid Fault Detection and Fault Ride-Through of Power Converters. Read here

MS(R) Thesis:  Understanding the Electrical, Thermal and Mechanical Properties of Epoxy Silicon Carbide Nanocomposites. 

Awards and Honours:

1. Dean’s Award for Excellent PhD Thesis: issued by Graduate Research School, UNSW, Australia. (2021)

2. International Graduate Research Scholarship: issued by Graduate Research School, UNSW, Australia. (2017)

3. Research Engineer, issued by National Research Fund, Singapore (2016)

4. Teaching Assistantship to pursue M.S. at IIT Madras: issued by Ministry of Human Resources and Development (MHRD), INDIA (Offer to Graduate Aptitude Test in Engineering (GATE) Exam Qualifiers). (2014)

5. IEEE Young Professional Award: To attend and present at the IEEE Innovative Smart Grid Technology (ISGT) conference. (2018)

6. IEEE Student Travel Grant: To attend and present at the IEEE conference 11th Energy Conversion Congress and Exposition (ECCE) held at Baltimore MD, USA. (2019)

7. Prestigious PRSS Scholarship for conference: issued by Graduate Research School, UNSW, Australia. (2017)

8. International Conference Travel Grant: issued by School of Electrical Engineering and Telecommunication, UNSW, Australia. (2018)