25 citations · 73 across the 17 of their papers we have counts for
17 papers
A Multi-Scale Attention-Based Attack Diagnosis Mechanism for Parallel Cyber-Physical Attacks in Power Grids
Junhao Ren, Kai Zhao, Guangxiao Zhang +3
Parallel cyber--physical attacks (PCPA) can simultaneously damage physical transmission lines and disrupt measurement data transmission in power grids, severely impairing system si…
Dynamic Power Systems Line Outage Detection Using Particle Filter and Partially Observed States
Xiaozhou Yang, Nan Chen, Chao Zhai
Real-time transmission line outage detection is difficult because of partial phasor measurement unit (PMU) deployment and varying outage signal strength. Existing detection approac…
Dynamic Security Assessment of Small-Signal Stability for Power Systems using Windowed Online Gaussian Process
Chao Zhai
Due to the evolving nature of power grids and model uncertainty, the online stability assessment of electrical power systems is always a challenging problem. This paper aims to pro…
Optimal Placement of Limited PMUs for Transmission Line Outage Detection and Identification
Xiaozhou Yang, Nan Chen, Chao Zhai
Phasor Measurement Unit (PMU) technology is increasingly used for real-time monitoring applications, especially line outage detection and identification (D&I) in the power system.…
A Control Chart Approach to Power System Line Outage Detection Under Transient Dynamics
Xiaozhou Yang, Nan Chen, Chao Zhai
Online transmission line outage detection over the entire network enables timely corrective action to be taken, which prevents a local event from cascading into a large scale black…
A Robust Optimization Approach for Terminating the Cascading Failure of Power Systems
Chao Zhai
Due to uncertainties and the complicated intrinsic dynamics of power systems, it is difficult to predict the cascading failure paths once the cascades occur. This makes it challeng…
Region of Attraction for Power Systems using Gaussian Process and Converse Lyapunov Function -- Part I: Theoretical Framework and Off-line Study
Chao Zhai, Hung D. Nguyen
This paper introduces a novel framework to construct the region of attraction (ROA) of a power system centered around a stable equilibrium by using stable state trajectories of sys…
Towards a Universal Approach for Identifying Cascading Failures of Power Grids
Chao Zhai, Gaoxi Xiao, Hehong Zhang +1
Due to the evolving nature of power systems and the complicated coupling relationship of power devices, it has been a great challenge to identify the contingencies that could trigg…
Identification and Analysis of Cascading Failures in Power Grids with Protective Actions
Chao Zhai, Gaoxi Xiao, Hehong Zhang
This paper aims to identify and analyze the initial contingencies or disturbances that could lead to the worst-case cascading failures of power grids. An optimal control approach i…
Contingency Identification of Cascading Failures in Power Transmission Networks
Chao Zhai, Hehong Zhang, Gaoxi Xiao +1
Due to the evolving nature of power systems and the complicated coupling relationship of power devices, it has been a great challenge to identify the contingencies that could trigg…
Risk Identification of Power Transmission System with Renewable Energy
Chao Zhai, Gaoxi Xiao, Hehong Zhang +1
This paper aims to investigate the risk identification problem of power transmission system that is integrated with renewable energy sources. In practice, the fluctuation of power…
Cooperative Control of TCSC to Relieve the Stress of Cyber-physical Power System
Chao Zhai, Gaoxi Xiao, Hehong Zhang +1
This paper addresses the cooperative control problem of Thyristor-Controlled Series Compensation (TCSC) to eliminate the stress of cyber-physical power system. The cyber-physical p…
Distributed Sweep Coverage Algorithm of Multi-agent Systems Using Workload Memory
Chao Zhai
This paper addresses the sweep coverage problem of multi-agent systems in uncertain regions. A new formulation of distributed sweep coverage is proposed to cooperatively complete t…
A Model Predictive Approach to Preventing Cascading Failures of Power Systems
Chao Zhai, Hehong Zhang, Gaoxi Xiao +1
Power system blackouts are usually triggered by the initial contingency and then deteriorate as the branch outage spreads quickly. Thus, it is crucial to eliminate the propagation…
Comparing Different Models for Investigating Cascading Failures in Power Systems
Chao Zhai, Hehong Zhang, Gaoxi Xiao +1
This paper centers on the comparison of three different models that describe cascading failures of power systems. Specifically, these models are different in characterizing the phy…
Identifying Critical Risks of Cascading Failures in Power Systems
Hehong Zhang, Chao Zhai, Gaoxi Xiao +1
Potential critical risks of cascading failures in power systems can be identified by exposing those critical electrical elements on which certain initial disturbances may cause max…
Modeling and Identification of Worst-Case Cascading Failures in Power Systems
Chao Zhai, Hehong Zhang, Gaoxi Xiao +1
Cascading failures in power systems normally occur as a result of initial disturbance or faults on electrical elements, closely followed by errors of human operators. It remains a…