Prof. ZHAO Changhong 趙常宏教授

Assistant Professor (MIEEE)
Education: BE (Tsinghua), MS, PhD (Caltech)
Research Area: Networking Theory, Internet and Applications
Tel: (852) 3943-5157
Fax: (852) 2603-5032
Address: Rm 806, Ho Sin Hang Engineering Building, CUHK
Email: chzhao [@] ie.cuhk.edu.hk

Prof. Zhao's website

Research Interests

  • Distributed control of network systems
  • Real-time convex and nonconvex optimization
  • Power and energy systems
  • Smart grid and smart city


Changhong Zhao joined the Department of Information Engineering, the Chinese University of Hong Kong, in 2019. His research interests include distributed control of network systems, real-time convex and nonconvex optimization, smart power grid, multi-energy systems, and smart-city infrastructure.

Changhong received BE degree in Automation from Tsinghua University, Beijing, China, in 2010, and PhD degree in Electrical Engineering from Caltech, in 2016. His PhD thesis on real-time load-side control of power systems received two Best Thesis Awards from Caltech EE Department and Engineering Division, respectively. From 2016 to 2019, he worked as a researcher at the National Renewable Energy Laboratory, Colorado, USA, where he led multiple projects on control and optimization of smart grid in collaboration with US Department of Energy and academic and industry partners.

Recent Selected Publications

  • Erik Weitenberg, Yan Jiang, Changhong Zhao, Enrique Mallada, Claudio De Persis, and Florian Dorfler, "Robust decentralized secondary frequency control in power systems: Merits and trade-offs," IEEE Transactions on Automatic Control, 2019.
  • Ahmed S. Zamzam, Emiliano Dall'Anese, Changhong Zhao, Josh A. Taylor, and Nicholas D. Sidiropoulos, "Optimal water-power flow-problem: Formulation and distributed optimal solution," IEEE Transactions on Control of Network Systems, 6(1):37--47, March 2019.
  • Changhong Zhao, Enrique Mallada, Steven H. Low, and Janusz Bialek, "Distributed plug-and-play optimal generator and load control for power system frequency regulation," International Journal of Electrical Power and Energy Systems, 101:1--12, October 2018.
  • Swaroop S. Guggilam, Changhong Zhao, Emiliano Dall'Anese, Yu Christine Chen, and Sairaj V. Dhople, "Optimizing DER participation in inertial and primary-frequency response," IEEE Transactions on Power Systems, 33(5):5194--5205, September 2018.
  • Xin Chen, Changhong Zhao, and Na Li, "Distributed automatic load-frequency control with optimality in power systems," IEEE Conference on Control Technology and Applications, Copenhagen, Denmark, August 2018, pp. 24--31. Best Student Paper Finalist.
  • Ying Jun Zhang, Changhong Zhao, Wanrong Tang, and Steven H. Low, "Profit-maximizing planning and control of battery energy storage systems for primary frequency control," IEEE Transactions on Smart Grid, 9(2):712--723, March 2018.
  • Enrique Mallada, Changhong Zhao, and Steven H. Low, "Optimal load-side control for frequency regulation in smart grids," IEEE Transactions on Automatic Control, 62(12):6294--6309, December 2017.
  • Changhong Zhao, Emiliano Dall'Anese, and Steven H. Low, "Convex relaxation of OPF in multiphase radial networks with delta connection," IREP Bulk Power Systems Dynamics and Control Symposium, Espinho, Portugal, August 2017.
  • Na Li, Changhong Zhao, and Lijun Chen, "Connecting automatic generation control and economic dispatch from an optimization view," IEEE Transactions on Control of Network Systems, 3(3):254--264, September 2016.
  • Changhong Zhao, Enrique Mallada, Steven H. Low, and Janusz Bialek, "A unified framework for frequency control and congestion management," Power Systems Computation Conference, Genoa, Italy, June 2016.
  • Changhong Zhao, Enrique Mallada, and Florian Dorfler, "Distributed frequency control for stability and economic dispatch in power networks," American Control Conference, Chicago, IL, USA, July 2015, pp. 2359--2364.
  • Changhong Zhao and Steven H. Low, "Optimal decentralized primary frequency control in power networks," IEEE Conference on Decision and Control, Los Angeles, CA, USA, December 2014, pp. 2467--2473.
  • Changhong Zhao, Ufuk Topcu, Na Li, and Steven H. Low, "Design and stability of load-side primary frequency control in power systems," IEEE Transactions on Automatic Control, 59(5):1177--1189, May 2014.
  • Changhong Zhao, Ufuk Topcu, and Steven H. Low, "Optimal load control via frequency measurement and neighborhood area communication," IEEE Transactions on Power Systems, 28(4):3576--3587, November 2013.