Case study: An adaptive underfrequency load-shedding system

Manson, Scott; Zweigle, Greg; Yedidi, Vinod

doi:10.1109/pcicon.2013.6666048

Cited by 11 publications

(3 citation statements)

References 3 publications

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“…Because turbines produce power, (1) is most commonly multiplied by the angular speed of the rotor in radians per second ( m) to come up with the terms of electrical and mechanical power, as shown in (2). 2 m m m e a 2 d J P P P dt (2) where: Pm is the mechanical power input to the turbine.…”

Section: Inertia Backgroundmentioning

confidence: 99%

“…Once a refinery is electrically connected to a large electric utility, the total generation and load inertias are substantially larger than those for islanded microgrids. These simplified measurement techniques and the composition of load and source inertias are essential for the application of frequency-based microgrid blackout protection schemes [2].…”

Section: Application Of Inertiamentioning

confidence: 99%

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Load modeling assumptions: What is accurate enough?

Khatib¹,

Appannagari²,

Manson³

et al. 2015

2015 IEEE Petroleum and Chemical Industry Committee Conference (PCIC)

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This paper presents an elegant method for determining the simplest model of a power system electrical/mechanical load that will suffice for dynamic frequency power system studies and closed-loop simulation work. The strategy behind this technique is to supply the simplest load model possible that gives sufficiently accurate results for the goals of each unique modeling effort.The paper identifies the frequency characteristics of several different load types. It also identifies the level of load model detail required for testing typical power management systems, contingency-based load-shedding systems, frequency-based load-shedding systems, governor control systems, island/grid/unit autosynchronization systems, and exciter control systems.The paper describes how to lump loads without loss of fidelity, when an induction motor needs to be modeled as a single-cage or double-cage motor model, what sort of mechanical load model is appropriate, when we can assume zero inertia for a direct-on-line type of load, and how to verify the turbine/generator inertia and load inertia from field tests.This paper concludes with a simple reference that engineers can use to specify the level of detail required when modeling industrial power system loads.

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Section: Inertia Backgroundmentioning

confidence: 99%

Section: Application Of Inertiamentioning

confidence: 99%

Load modeling assumptions: What is accurate enough?

Khatib¹,

Appannagari²,

Manson³

et al. 2015

2015 IEEE Petroleum and Chemical Industry Committee Conference (PCIC)

Self Cite

View full text Add to dashboard Cite

show abstract

“…This idea can be extended to the case of multiple generators by adding individual power imbalance, which gives the total load-generation imbalance in the power system [3]. Furthermore, the accuracy of estimation can be enhanced by using voltage measurements in addition to ROCOF data [4], [5], and load characteristics and system topology [6].…”

Section: Introductionmentioning

confidence: 99%

Data-driven Localization and Estimation of Disturbance in the Interconnected Power System

Lee

Zhang

Modiano

2018

2018 IEEE International Conference on Communications, Control, and Computing Technologies for Smart Grids (SmartGridComm)

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Identifying the location of a disturbance and its magnitude is an important component for stable operation of power systems. We study the problem of localizing and estimating a disturbance in the interconnected power system. We take a model-free approach to this problem by using frequency data from generators. Specifically, we develop a logistic regression based method for localization and a linear regression based method for estimation of the magnitude of disturbance. Our model-free approach does not require the knowledge of system parameters such as inertia constants and topology, and is shown to achieve highly accurate localization and estimation performance even in the presence of measurement noise and missing data.

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Using protective relays for microgrid controls

Edwards¹,

Manson²

2018

2018 71st Annual Conference for Protective Relay Engineers (CPRE)

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Case study: An adaptive underfrequency load-shedding system

Cited by 11 publications

References 3 publications

Load modeling assumptions: What is accurate enough?

Load modeling assumptions: What is accurate enough?

Data-driven Localization and Estimation of Disturbance in the Interconnected Power System

Using protective relays for microgrid controls

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