Search Results for author: Steven H. Low

Found 15 papers, 5 papers with code

Reverse Kron reduction of Multi-phase Radial Network

no code implementations26 Mar 2024 Steven H. Low

We consider the problem of identifying the admittance matrix of a three-phase radial network from voltage and current measurements at a subset of nodes.

Stability Constrained Reinforcement Learning for Decentralized Real-Time Voltage Control

1 code implementation16 Sep 2022 Jie Feng, Yuanyuan Shi, Guannan Qu, Steven H. Low, Anima Anandkumar, Adam Wierman

In this paper, we propose a stability-constrained reinforcement learning (RL) method for real-time voltage control, that guarantees system stability both during policy learning and deployment of the learned policy.

reinforcement-learning Reinforcement Learning (RL)

DeepOPF-AL: Augmented Learning for Solving AC-OPF Problems with Multiple Load-Solution Mappings

no code implementations7 Jun 2022 Xiang Pan, Wanjun Huang, Minghua Chen, Steven H. Low

The existence of multiple load-solution mappings of non-convex AC-OPF problems poses a fundamental challenge to deep neural network (DNN) schemes.

Interface Networks for Failure Localization in Power Systems

no code implementations12 May 2022 Chen Liang, Alessandro Zocca, Steven H. Low, Adam Wierman

Transmission power systems usually consist of interconnected sub-grids that are operated relatively independently.

Ensuring DNN Solution Feasibility for Optimization Problems with Convex Constraints and Its Application to DC Optimal Power Flow Problems

no code implementations15 Dec 2021 Tianyu Zhao, Xiang Pan, Minghua Chen, Steven H. Low

We systematically calibrate inequality constraints used in DNN training, thereby anticipating prediction errors and ensuring the resulting solutions remain feasible.

Robustness and Consistency in Linear Quadratic Control with Untrusted Predictions

no code implementations NeurIPS 2021 Tongxin Li, Ruixiao Yang, Guannan Qu, Guanya Shi, Chenkai Yu, Adam Wierman, Steven H. Low

Motivated by online learning methods, we design a self-tuning policy that adaptively learns the trust parameter $\lambda$ with a competitive ratio that depends on $\varepsilon$ and the variation of system perturbations and predictions.

DeepOPF-V: Solving AC-OPF Problems Efficiently

1 code implementation22 Mar 2021 Wanjun Huang, Xiang Pan, Minghua Chen, Steven H. Low

AC optimal power flow (AC-OPF) problems need to be solved more frequently in the future to maintain stable and economic power system operation.

Computational Efficiency

Learning-Based Predictive Control via Real-Time Aggregate Flexibility

no code implementations21 Dec 2020 Tongxin Li, Bo Sun, Yue Chen, Zixin Ye, Steven H. Low, Adam Wierman

To be used effectively, an aggregator must be able to communicate the available flexibility of the loads they control, as known as the aggregate flexibility to a system operator.

Optimization and Control Systems and Control Systems and Control

Adaptive Charging Networks: A Framework for Smart Electric Vehicle Charging

1 code implementation4 Dec 2020 Zachary J. Lee, George Lee, Ted Lee, Cheng Jin, Rand Lee, Zhi Low, Daniel Chang, Christine Ortega, Steven H. Low

We describe the architecture and algorithms of the Adaptive Charging Network (ACN), which was first deployed on the Caltech campus in early 2016 and is currently operating at over 100 other sites in the United States.

Model Predictive Control Scheduling

ACN-Sim: An Open-Source Simulator for Data-Driven Electric Vehicle Charging Research

1 code implementation4 Dec 2020 Zachary J. Lee, Sunash Sharma, Daniel Johansson, Steven H. Low

ACN-Sim is a data-driven, open-source simulation environment designed to accelerate research in the field of smart electric vehicle (EV) charging.

OpenAI Gym Reinforcement Learning (RL)

DeepOPF: A Feasibility-Optimized Deep Neural Network Approach for AC Optimal Power Flow Problems

no code implementations2 Jul 2020 Xiang Pan, Minghua Chen, Tianyu Zhao, Steven H. Low

High percentage penetrations of renewable energy generations introduce significant uncertainty into power systems.

Adaptive Network Response to Line Failures in Power Systems

no code implementations22 May 2020 Chen Liang, Linqi Guo, Alessandro Zocca, Steven H. Low, Adam Wierman

Transmission line failures in power systems propagate and cascade non-locally.

Line Failure Localization of Power Networks Part II: Cut Set Outages

no code implementations22 May 2020 Linqi Guo, Chen Liang, Alessandro Zocca, Steven H. Low, Adam Wierman

Transmission line failure in power systems prop-agate non-locally, making the control of the resulting outages extremely difficult.

Line Failure Localization of Power Networks Part I: Non-cut Outages

no code implementations20 May 2020 Linqi Guo, Chen Liang, Alessandro Zocca, Steven H. Low, Adam Wierman

Transmission line failures in power systems propagate non-locally, making the control of the resulting outages extremely difficult.

On Identification of Distribution Grids

1 code implementation5 Nov 2017 Omid Ardakanian, Vincent W. S. Wong, Roel Dobbe, Steven H. Low, Alexandra von Meier, Claire Tomlin, Ye Yuan

Large-scale integration of distributed energy resources into residential distribution feeders necessitates careful control of their operation through power flow analysis.

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