Journal ArticleDOI
Local and Wide-Area PMU-Based Decentralized Dynamic State Estimation in Multi-Machine Power Systems
TLDR
In this paper, the authors employ the extended Kalman filter with unknown inputs, referred to as the EKF-UI technique, for decentralized dynamic state estimation of a synchronous machine states using terminal active and reactive powers, voltage phasor and frequency measurements.Abstract:
Accurate measurement of the rotor angle and speed of synchronous generators is instrumental in developing powerful local or wide-area control and monitoring systems to enhance power grid stability and reliability. Exogenous input signals such as field voltage and mechanical torque are critical information in this context, but obtaining them raises significant logistical challenges, which in turn complicates the estimation of the generator dynamic states from easily available terminal phasor measurement unit (PMU) signals only. To overcome these issues, the authors of this paper employ the extended Kalman filter with unknown inputs, referred to as the EKF-UI technique, for decentralized dynamic state estimation of a synchronous machine states using terminal active and reactive powers, voltage phasor and frequency measurements. The formulation is fully decentralized without single-machine infinite bus (SMIB) or excitation model assumption so that only local information is required. It is demonstrated that using the decentralized EKF-UI scheme, synchronous machine states can be estimated accurately enough to enable wide-area power system stabilizers (WA-PSS) and system integrity protection schemes (SIPS). Simulation results on New-England test system, Hydro-Quebec simplified system, and Kundur network highlight the efficiency of the proposed method under fault conditions with electromagnetic transients and full-order generator models in realistic multi-machine setups.read more
Citations
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Journal ArticleDOI
Power System Dynamic State Estimation: Motivations, Definitions, Methodologies, and Future Work
Junbo Zhao,Antonio Gomez-Exposito,Marcos Netto,Lamine Mili,Ali Abur,Vladimir Terzija,Innocent Kamwa,Bikash C. Pal,Abhinav Kumar Singh,Junjian Qi,Zhenyu Huang,A. P. Sakis Meliopoulos +11 more
TL;DR: A unified framework is proposed to clarify the important concepts related to DSE, forecasting-aided state estimation, trackingstate estimation, and static state estimation and provide future research needs and directions for the power engineering community.
Journal ArticleDOI
A Robust Iterated Extended Kalman Filter for Power System Dynamic State Estimation
TL;DR: In this paper, a robust iterated extended Kalman filter (EKF) based on the generalized maximum likelihood approach (termed GM-IEKF), is proposed for estimating power system state dynamics when subjected to disturbances.
Proceedings ArticleDOI
Characterizing and quantifying noise in PMU data
TL;DR: In this article, the probability distribution of measurement noise and its typical power are identified for voltage, current and frequency data recorded at three different voltage levels, and the PMU noise quantification can help in generation of experimental PMU data in close conformity with field PMUs.
Journal ArticleDOI
Cybersecurity for distributed energy resources and smart inverters
TL;DR: This study proposes a holistic attack-resilient framework to protect the integrated DER and the critical power grid infrastructure from malicious cyber-attacks, helping ensure the secure integration of DER without harming the grid reliability and stability.
Journal ArticleDOI
Derivative-Free Kalman Filtering Based Approaches to Dynamic State Estimation for Power Systems With Unknown Inputs
TL;DR: In this paper, a decentralized derivative-free dynamic state estimation method is proposed to address cases when system linearization is cumbersome or impossible, where several inputs such as the excitation voltage are characterized by uncertainty in terms of their status.
References
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Book
Power System Stability and Control
TL;DR: In this article, the authors present a model for the power system stability problem in modern power systems based on Synchronous Machine Theory and Modelling, and a model representation of the synchronous machine representation in stability studies.
Journal ArticleDOI
Brief paper: Unbiased minimum-variance input and state estimation for linear discrete-time systems
Steven Gillijns,Bart De Moor +1 more
TL;DR: A recursive filter, optimal in the minimum-variance unbiased sense, is developed where the estimation of the state and the input are interconnected and the state estimation problem is transformed into a standard Kalman filtering problem.
Journal ArticleDOI
Dynamic State Estimation in Power System by Applying the Extended Kalman Filter With Unknown Inputs to Phasor Measurements
TL;DR: In this paper, an extended Kalman filter (EKF) technique for dynamic state estimation of a synchronous machine using phasor measurement unit (PMU) quantities is developed.
Journal ArticleDOI
WACS-Wide-Area Stability and Voltage Control System: R&D and Online Demonstration
TL;DR: Online demonstration of a new response-based (feedback) Wide-Area stability and voltage Control System (WACS) is described, developed as a flexible platform to prevent blackouts and facilitate electrical commerce.