488 citations · 685 across the 43 of their papers we have counts for
18 papers · 1 filter
Robust Distribution Network Reconfiguration Using Mapping-based Column-and-Constraint Generation
Runjie Zhang, Kaiping Qu, Changhong Zhao +1
The integration of intermittent renewable energy sources into distribution networks introduces significant uncertainties and fluctuations, challenging their operational security, s…
Hierarchical Game for Coupled Power System with Energy Sharing and Transportation System
Dongxiang Yan, Tongxin Li, Changhong Zhao +2
The wide deployment of distributed renewable energy sources and electric vehicles can help mitigate climate crisis. This necessitates new business models in the power sector to hed…
Reinforcement Learning for Distributed Transient Frequency Control with Stability and Safety Guarantees
Zhenyi Yuan, Changhong Zhao, Jorge Cortes
This paper proposes a reinforcement learning-based approach for optimal transient frequency control in power systems with stability and safety guarantees. Building on Lyapunov stab…
AC-Feasible Power Transfer Regions of Virtual Power Plants: Characterization and Application
Wei Lin, Changhong Zhao
Distributed energy resources (DERs) in distribution networks can be aggregated as a virtual power plant (VPP) for transmission-level operations. A critical challenge for such coord…
Cost Functions over Feasible Power Transfer Regions of Virtual Power Plants
Wei Lin, Changhong Zhao
A virtual power plant (VPP) facilitates the integration of distributed energy resources (DERs) for the transmission-level operation. A challenge in operating a VPP is to characteri…
Optimal Energy Scheduling and Sensitivity Analysis for Integrated Power-Water-Heat Systems
Sidun Fang, Chenxu Wang, Yashen Lin +1
The conventionally independent power, water, and heating networks are becoming more tightly connected, which motivates their joint optimal energy scheduling to improve the overall…
Privacy-Preserving Distributed Optimal Power Flow with Partially Homomorphic Encryption
Tong Wu, Changhong Zhao, Ying-Jun Angela Zhang
Distribution grid agents are obliged to exchange and disclose their states explicitly to neighboring regions to enable distributed optimal power flow dispatch. However, the states…
Distributed Optimal Load Frequency Control Considering Nonsmooth Cost Functions
Zhaojian Wang, Feng Liua, Changhong Zhao +2
This work addresses the distributed frequency control problem in power systems considering controllable load with a nonsmooth cost. The nonsmoothness exists widely in power systems…
Aggregate Power Flexibility in Unbalanced Distribution Systems
Xin Chen, Emiliano Dall'Anese, Changhong Zhao +1
With a large-scale integration of distributed energy resources (DERs), distribution systems are expected to be capable of providing capacity support for the transmission grid. To e…
Graph Laplacian Spectrum and Primary Frequency Regulation
Linqi Guo, Changhong Zhao, Steven H. Low
We present a framework based on spectral graph theory that captures the interplay among network topology, system inertia, and generator and load damping in determining the overall…
Power-Traffic Coordinated Operation for Bi-Peak Shaving and Bi-Ramp Smoothing -A Hierarchical Data-Driven Approach
Huaiguang Jiang, Yingchen Zhang, Yuche Chen +2
With the rapid adoption of distributed photovoltaics (PVs) in certain regions, issues such as lower net load valley during the day and more steep ramping of the demand after sunset…
Engineering Inertial and Primary-frequency Response for Distributed Energy Resources
Swaroop S. Guggilam, Changhong Zhao, Emiliano Dall'Anese +2
We propose a framework to engineer synthetic-inertia and droop-control parameters for distributed energy resources (DERs) so that the system frequency in a network composed of DERs…
Distributed Frequency Control with Operational Constraints, Part II: Network Power Balance
Zhaojian Wang, Feng Liu, Steven H. Low +2
In Part I of this paper we propose a decentralized optimal frequency control of multi-area power system with operational constraints, where the tie-line powers remain unchanged in…
Distributed Frequency Control with Operational Constraints, Part I: Per-Node Power Balance
Zhaojian Wang, Feng Liu, Steven H. Low +2
This paper addresses the distributed optimal frequency control of multi-area power system with operational constraints, including the regulation capacity of individual control area…
Profit-Maximizing Planning and Control of Battery Energy Storage Systems for Primary Frequency Control
Ying Jun, Zhang, Changhong Zhao +2
We consider a two-level profit-maximizing strategy, including planning and control, for battery energy storage system (BESS) owners that participate in the primary frequency contro…
Optimal Sizing of Voltage Control Devices for Distribution Circuit with Intermittent Load
Changhong Zhao, Michael Chertkov, Scott Backhaus
We consider joint control of a switchable capacitor and a D-STATCOM for voltage regulation in a distribution circuit with intermittent load. The control problem is formulated as a…
Decentralized Primary Frequency Control in Power Networks
Changhong Zhao, Steven Low
We augment existing generator-side primary frequency control with load-side control that are local, ubiquitous, and continuous. The mechanisms on both the generator and the load si…
Design and Stability of Load-Side Primary Frequency Control in Power Systems
Changhong Zhao, Ufuk Topcu, Na Li +1
We present a systematic method to design ubiquitous continuous fast-acting distributed load control for primary frequency regulation in power networks, by formulating an optimal lo…