488 citations · 685 across the 43 of their papers we have counts for
23 papers · 1 filter
Achieving Social Optimum and Budget Balance via a Joint Electricity-Carbon Pricing Mechanism
Yue Chen, Changhong Zhao
Decarbonizing electric grids is a crucial global endeavor in the pursuit of carbon neutrality. Taking carbon emissions from generation into account when pricing electricity usage i…
A Hierarchical OPF Algorithm with Improved Gradient Evaluation in Three-Phase Networks
Heng Liang, Xinyang Zhou, Changhong Zhao
Linear approximation commonly used in solving alternating-current optimal power flow (AC-OPF) simplifies the system models but incurs accumulated voltage errors in large power netw…
Deep-Learning-Aided Voltage-Stability-Enhancing Stochastic Distribution Network Reconfiguration
Wanjun Huang, Changhong Zhao
Power distribution networks are approaching their voltage stability boundaries due to the severe voltage violations and the inadequate reactive power reserves caused by the increas…
Improved Successive Branch Reduction for Stochastic Distribution Network Reconfiguration
Wanjun Huang, Changhong Zhao
We propose an improved successive branch reduction (SBR) method to solve stochastic distribution network reconfiguration (SDNR), a mixed-integer program that is known to be computa…
Hierarchical Optimal Power Flow with Improved Gradient Evaluation
Heng Liang, Xinyang Zhou, Changhong Zhao
Existing algorithms to solve alternating-current optimal power flow (AC-OPF) often exploit linear approximations to simplify system models and accelerate computations. In this pape…
An Online Joint Optimization-Estimation Architecture for Distribution Networks
Yi Guo, Xinyang Zhou, Changhong Zhao +3
In this paper, we propose an optimal control-estimation architecture for distribution networks, which jointly solves the optimal power flow (OPF) problem and static state estimatio…
Improved Approximation of Dispatchable Region in Radial Distribution Networks via Dual SOCP
Yue Chen, Changhong Zhao
The concept of dispatchable region is useful in quantifying how much renewable generation power the system can handle. In this paper, we aim to provide an improved dispatchable reg…
Economic Dispatch With Distributed Energy Resources: Co-Optimization of Transmission and Distribution Systems
Xinyang Zhou, Chin-Yao Chang, Andrey Bernstein +2
The increasing penetration of distributed energy resources (DERs) in the distribution networks has turned the conventionally passive load buses into active buses that can provide g…
Approaching Prosumer Social Optimum via Energy Sharing with Proof of Convergence
Yue Chen, Changhong Zhao, Steven H. Low +1
With the advent of prosumers, the traditional centralized operation may become impracticable due to computational burden, privacy concerns, and conflicting interests. In this paper…
Decentralized Provision of Renewable Predictions within a Virtual Power Plant
Yue Chen, Tongxin Li, Changhong Zhao +1
The mushrooming of distributed energy resources turns end-users from passive price-takers to active market participants. To manage those massive proactive end-users efficiently, vi…
Optimal Power Flow with State Estimation In the Loop for Distribution Networks
Yi Guo, Xinyang Zhou, Changhong Zhao +2
We propose a framework for integrating optimal power flow (OPF) with state estimation (SE) in the loop for distribution networks. Our approach combines a primal-dual gradient-based…
Exponential Stability of Partial Primal-Dual Gradient Dynamics with Nonsmooth Objective Functions
Zhaojian Wang, Wei Wei, Changhong Zhao +3
In this paper, we investigate the continuous time partial primal-dual gradient dynamics (P-PDGD) for solving convex optimization problems with the form $ \min\limits_{x\in X,y\inΩ}…
Multi-Level Optimal Power Flow Solver in Large Distribution Networks
Xinyang Zhou, Yue Chen, Zhiyuan Liu +2
Solving optimal power flow (OPF) problems for large distribution networks incurs high computational complexity. We consider a large multi-phase distribution network of tree topolog…
Solving Optimal Power Flow for Distribution Networks with State Estimation Feedback
Yi Guo, Xinyang Zhou, Changhong Zhao +3
Conventional optimal power flow (OPF) solvers assume full observability of the involved system states. However, in practice, there is a lack of reliable system monitoring devices i…
Gradient-Based Multi-Area Distribution System State Estimation
Xinyang Zhou, Zhiyuan Liu, Yi Guo +3
The increasing distributed and renewable energy resources and controllable devices in distribution systems make fast distribution system state estimation (DSSE) crucial in system m…
Accelerated Voltage Regulation in Multi-Phase Distribution Networks Based on Hierarchical Distributed Algorithm
Xinyang Zhou, Zhiyuan Liu, Changhong Zhao +1
We propose a hierarchical distributed algorithm to solve optimal power flow (OPF) problems that aim at dispatching controllable distributed energy resources (DERs) for voltage regu…
Distributed Automatic Load-Frequency Control with Optimality in Power Systems
Xin Chen, Changhong Zhao, Na Li
With the increasing penetration of renewable energy resources, power systems face new challenges in balancing power supply and demand and maintaining the nominal frequency. This pa…
Hierarchical Distributed Voltage Regulation in Networked Autonomous Grids
Xinyang Zhou, Zhiyuan Liu, Wenbo Wang +3
We propose a novel algorithm to solve optimal power flow (OPF) that aims at dispatching controllable distributed energy resources (DERs) for voltage regulation at minimum cost. The…
Robust Decentralized Secondary Frequency Control in Power Systems: Merits and Trade-Offs
Erieke Weitenberg, Yan Jiang, Changhong Zhao +3
Frequency restoration in power systems is conventionally performed by broadcasting a centralized signal to local controllers. As a result of the energy transition, technological ad…
Optimal Water-Power Flow Problem: Formulation and Distributed Optimal Solution
Ahmed S. Zamzam, Emiliano Dall'Anese, Changhong Zhao +2
This paper formalizes an optimal water-power flow (OWPF) problem to optimize the use of controllable assets across power and water systems while accounting for the couplings betwee…
Load-Flow in Multiphase Distribution Networks: Existence, Uniqueness, Non-Singularity and Linear Models
Andrey Bernstein, Cong Wang, Emiliano Dall'Anese +2
This paper considers unbalanced multiphase distribution systems with generic topology and different load models, and extends the Z-bus iterative load-flow algorithm based on a fixe…
Network-Cognizant Voltage Droop Control for Distribution Grids
Kyri Baker, Andrey Bernstein, Emiliano Dall'Anese +1
This paper examines distribution systems with a high integration of distributed energy resources (DERs) and addresses the design of local control methods for real-time voltage regu…
Optimal load-side control for frequency regulation in smart grids
Enrique Mallada, Changhong Zhao, Steven H. Low
Frequency control rebalances supply and demand while maintaining the network state within operational margins. It is implemented using fast ramping reserves that are expensive and…