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Basics of Voltage Stability Assessment

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Use of Voltage Stability Assessment and Transient Stability Assessment Tools in Grid Operations

Part of the book series: Power Electronics and Power Systems ((PEPS))

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Abstract

In this chapter, the fundamentals of long-term voltage stability and short-term voltage stability phenomenon in power systems are described by studying the various parametric dependencies along with the respective assessment methods. Numerical techniques that enable scalable assessment of voltage stability in practical systems are described along with examples. The continuation power flow and Thevenin methods are used for assessing long-term voltage stability. For assessing short-term voltage stability, the composite load model with induction motor dynamics is analyzed and the phenomenon is monitored using Lyapunov exponents and load admittances. Thevenin methods, load admittances, and Lyapunov exponents are model-free techniques that can be applied on Synchrophasor measurements (online) or simulation data (offline) for voltage stability assessment. This chapter demonstrates that accounting for detailed transmission and distribution (T&D) system models are important to capture the true behavior of the overall system under various operating conditions. T&D co-simulation is introduced as an effective method to capture the T&D interactions through examples showcasing the impact of distributed energy resources on voltage stability that will be critical in the grid of the future.

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Authors and Affiliations

  1. Department of Electrical and Computer Engineering, Iowa State University, Ames, IA, USA

    Amarsagar Reddy Ramapuram Matavalam, Alok Kumar Bharati & Venkataramana Ajjarapu

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  1. Amarsagar Reddy Ramapuram Matavalam
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  2. Alok Kumar Bharati
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  3. Venkataramana Ajjarapu
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Correspondence to Venkataramana Ajjarapu .

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Editors and Affiliations

  1. Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX, USA, Principal Engineer - Contractor, System Operations Engineering, Dominion Energy, Richmond, VA, USA

    Sarma (NDR) Nuthalapati

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Ramapuram Matavalam, A.R., Bharati, A.K., Ajjarapu, V. (2021). Basics of Voltage Stability Assessment. In: Nuthalapati, S.(. (eds) Use of Voltage Stability Assessment and Transient Stability Assessment Tools in Grid Operations. Power Electronics and Power Systems. Springer, Cham. https://doi.org/10.1007/978-3-030-67482-3_2

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  • DOI: https://doi.org/10.1007/978-3-030-67482-3_2

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  • Online ISBN: 978-3-030-67482-3

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