Load modelling influence on voltage stability assessment in distribution systems. Part I: Stability index and critical power for a single-line system

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Abstract

The single-line equivalent model is commonly used for voltage stability studies in both distribution and transmission systems. Referring to a single-line system, in the companion paper [1] the authors presented the theoretical aspects of voltage stability related to the load characteristics. In particular, expressions of the stability index for constant power, constant impedance and constant current loads, singularly and in all the possible combinations have been obtained. This index indicates how far the load node is from its voltage collapse point, allowing the maximum load power beyond which voltage collapse takes place to be evaluated. In this paper a simple method to evaluate the parameters which define the single-line equivalent system of a radial distribution network is presented, allowing to extent to it the expressions of the stability index previously found. Finally, the results of a detailed analysis of the influence of load models on the voltage stability of a realistic network, obtained with differentmethodologies, are reported for comparison and discussed.
Lingua originaleEnglish
Stato di pubblicazionePublished - 2006

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Voltage control
Electric potential

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title = "Load modelling influence on voltage stability assessment in distribution systems. Part I: Stability index and critical power for a single-line system",
abstract = "The single-line equivalent model is commonly used for voltage stability studies in both distribution and transmission systems. Referring to a single-line system, in the companion paper [1] the authors presented the theoretical aspects of voltage stability related to the load characteristics. In particular, expressions of the stability index for constant power, constant impedance and constant current loads, singularly and in all the possible combinations have been obtained. This index indicates how far the load node is from its voltage collapse point, allowing the maximum load power beyond which voltage collapse takes place to be evaluated. In this paper a simple method to evaluate the parameters which define the single-line equivalent system of a radial distribution network is presented, allowing to extent to it the expressions of the stability index previously found. Finally, the results of a detailed analysis of the influence of load models on the voltage stability of a realistic network, obtained with differentmethodologies, are reported for comparison and discussed.",
author = "Luigi Dusonchet and Ippolito, {Mariano Giuseppe} and Stefano Mangione and Antonino Augugliaro and {Riva Sanseverino}, Eleonora and Salvatore Favuzza",
year = "2006",
language = "English",

}

TY - CONF

T1 - Load modelling influence on voltage stability assessment in distribution systems. Part I: Stability index and critical power for a single-line system

AU - Dusonchet, Luigi

AU - Ippolito, Mariano Giuseppe

AU - Mangione, Stefano

AU - Augugliaro, Antonino

AU - Riva Sanseverino, Eleonora

AU - Favuzza, Salvatore

PY - 2006

Y1 - 2006

N2 - The single-line equivalent model is commonly used for voltage stability studies in both distribution and transmission systems. Referring to a single-line system, in the companion paper [1] the authors presented the theoretical aspects of voltage stability related to the load characteristics. In particular, expressions of the stability index for constant power, constant impedance and constant current loads, singularly and in all the possible combinations have been obtained. This index indicates how far the load node is from its voltage collapse point, allowing the maximum load power beyond which voltage collapse takes place to be evaluated. In this paper a simple method to evaluate the parameters which define the single-line equivalent system of a radial distribution network is presented, allowing to extent to it the expressions of the stability index previously found. Finally, the results of a detailed analysis of the influence of load models on the voltage stability of a realistic network, obtained with differentmethodologies, are reported for comparison and discussed.

AB - The single-line equivalent model is commonly used for voltage stability studies in both distribution and transmission systems. Referring to a single-line system, in the companion paper [1] the authors presented the theoretical aspects of voltage stability related to the load characteristics. In particular, expressions of the stability index for constant power, constant impedance and constant current loads, singularly and in all the possible combinations have been obtained. This index indicates how far the load node is from its voltage collapse point, allowing the maximum load power beyond which voltage collapse takes place to be evaluated. In this paper a simple method to evaluate the parameters which define the single-line equivalent system of a radial distribution network is presented, allowing to extent to it the expressions of the stability index previously found. Finally, the results of a detailed analysis of the influence of load models on the voltage stability of a realistic network, obtained with differentmethodologies, are reported for comparison and discussed.

UR - http://hdl.handle.net/10447/4555

M3 - Paper

ER -