Dr.-Ing. Yonggang Zhang

• Since 2021: Research assistant at the Department of Energy Management and Operation of Electrical Grids at the University of Kassel
• 2017 - 2021: PhD at the Chair of Electrical Grids and Renewable Energy at Otto von Guericke University Magdeburg with the dissertation "Analysis and Control of Resonances in HVDC Connected DFIG-based Offshore Wind Farm"
• 2012 - 2017: Research assistant at China Electric Power Research Institute (CEPRI) in the field of "Automation of Electric Power System"
• 2011 - 2012: Development engineer of EMS/SCADA software at NARI Technology Co., Ltd (China).
• 2008 - 2010: Studied electrical engineering at the University of Duisburg-Essen, graduating with a Master of Science degree
• 2003 - 2007: Studied electrical engineering at the University of Chang'an (China) with a Bachelor of Engineering degree

• Stability studies in converter-dominated grids
• Design and evaluation of grid-forming converter controls
• HVDC controls and stability analysis

2025

• Y. Zhang, P. Unruh, B. Fischer, and M. Braun, "Comparative Impedance Characteristic Analysis of Grid-Following and Grid-Forming Inverters," IET Renewable Power Generation, 2025, doi: https://doi.org/10.1049/rpg2.70020.

2024

• Y. Zhang, Y. Lamrani, X. Guillaud and M. Braun, "Small-Signal AC-DC Coupling Analysis of Grid-Following and Grid-Forming MMCs," 2024 IEEE Power & Energy Society General Meeting (PESGM), Seattle, WA, USA, 2024, pp. 1-5, doi: 10.1109/PESGM51994.2024.10689133.
• Y. Zhang, C. Hachmann, N. Wiese, M. Braun, Y. Lamrani and X. Guillaud, "Comparative AC-DC Interaction Analysis for Grid-Following and Grid-Forming HVDC Converters," 2024 IEEE PES Innovative Smart Grid Technologies Europe (ISGT EUROPE), Dubrovnik, Croatia, 2024, pp. 1-5, doi: 10.1109/ISGTEUROPE62998.2024.10863402.

2023

• Y. Zhang, N. Wiese, Z. Liu, M. Braun,"On the Control Interaction of Synchronous Machine and Grid-Connected Converter during System-Split Situations," International Journal of Electrical Power & Energy Systems, Elsevier, 2023.

2022

• N. Wiese, Y. Zhang, M. Braun,"New Current Limiting Control for Grid-Forming Converters under Unbalanced Faults," Wind & Solar Integration Workshop 2022, The Hague, Netherlands.
• K. Fischbach, N. Wiese, Y. Zhang, M. Braun,"Continuous Grid-Forming Control with Transient Current Limitation," NEIS 2022, Hamburg, Germany.
• Y. Zhang, D. Duckwitz, N. Wiese and M. Braun,"Extended Nodal Admittance Matrix Based Stability Analysis of HVDC Connected AC Grids," in IEEE Access, vol. 10, pp. 55200-55212, 2022, doi: 10.1109/ACCESS.2022.3177232.

2021

• N. Wiese, D. Duckwitz, M. Nuschke, Y. Zhang and M. Braun,"Fault operation of grid-forming converters with focus on system stability," Solar Integration Workshop 2021, Berlin, Germany.