Development and Validation of a Comprehensive Synchronous Machine Model for a Real-Time Environment

Dehkordi, Ali Banitalebi; Neti, Prabhakar; Gole, Aniruddha M.; Maguire, T.

doi:10.1109/tec.2009.2038530

Cited by 46 publications

(16 citation statements)

References 15 publications

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“…In the previous works, based on winding function theory, the calculation of SPSM inductances is carried out using numerical integration or inexact analytical equations based on approximated Fourier series expansions of the inverse air gap function [11][12][13][14][15][16], except [17], in which, the air gap function has been estimated by a step function.…”

Section: Introductionmentioning

confidence: 99%

An Improved Analytical Model for Salient Pole Synchronous Machines Under General Eccentricity Fault

Akbari¹

2013

PIER B

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Abstract-This paper develops a more precise analytical model for calculating salient pole synchronous machine (SPSM) inductances in case of general eccentricity including static, dynamic and mixed eccentricities. The developed method is based on the modified winding function approach (MWFA) which accurately considers variable air gap function and leads to pure analytical expressions of inductances. Available analytical techniques, based on MWFA, approximate the air gap function and simplify the geometrical model of SPSM, whereas, in this study, the influence of the openings between the rotor salient poles has been taken into account by using an effective form of rotor pole shoes. Using this technique, flux fringing effect is considered. By taking into account machine geometry, type of windings connection and flux fringing effect, this method is able to model most of the important features of an eccentric SPSM. The developed analytical expressions can calculate time varying inductances of SPSMs with any eccentricity type and degree in the frame of a single program. Simulation results for static eccentricity are compared with experimental tests on a laboratory generator to verify accuracy of the proposed model.

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Section: Introductionmentioning

confidence: 99%

An Improved Analytical Model for Salient Pole Synchronous Machines Under General Eccentricity Fault

Akbari¹

2013

PIER B

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“…All available techniques based on the winding function theory use numerical integration or inexact analytical equations based on approximated Fourier series expansions of the inverse air-gap function for updating time-varying inductances of salient pole machines [10,24,[26][27][28][29][30][31]. The objective of this article is to establish precise analytical equations for salient pole machine inductances under different eccentricity conditions.…”

Section: Introductionmentioning

confidence: 99%

A Novel Technique for the Computation of Inductances of Salient Pole Machines under Different Eccentricity Conditions

Akbari

Milimonfared

Kelk

2011

Electric Power Components and Systems

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In this article, comprehensive analytical equations are developed to compute time-varying inductances of salient pole machines with any eccentricity type and degree in a unified technique. For this purpose, the inverse air-gap function of the eccentric salient pole machine has been defined, and its indefinite integral has then been determined. The derived analytical expressions, unlike the previous proposals, take into account all the harmonics of the inverse of the air-gap function without any development in Fourier series. The presented method eliminates the need for inexact analytical equations, numerical differentiations, and huge lookup tables, which are common in the modified winding function approach. Theoretical fundamentals and experimental results that validate the proposed technique are presented.

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“…This study is performed in a Real Time Digital Simulator (RTDS) [18] that uses a model of the synchronous generator and respective controls for protection analysis [19] ̶ [21]. The generators are parameterized with actual data from a Brazilian hydroelectric power plant (HPP).…”

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confidence: 99%

Loss-of-Excitation Protection and Underexcitation Controls Correlation for Synchronous Generators in a Real-Time Digital Simulator

Coelho

Carrer

Guerrero

et al. 2015

IEEE Trans. on Ind. Applicat.

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This paper presents the results of a study which analyzes the relationship between the excitation system of a synchronous machine and the settings of the loss-of-excitation (LOE) relay applied to protect this machine. A complete generation system taking into account all the physical components were modeled in a Real Time Digital Simulator (RTDS), including a new excitation system model (ST7B). By considering a method to protect the generator against partial and total LOE, the settings of the LOE protection were made taking into account the technical data of the synchronous machine. A hardware-in-the-loop (HIL) simulation using a numeric relay was implemented in laboratory. Thus, several tests were performed in order to evaluate the coordination between the protective relay and the limits of the modeled excitation system during underexcited operation.Index Terms-synchronous generator, loss-of-excitation, protection, underexcitation limiter, steady-state stability limit, RTDS, hardware-in-the-loop. 0093-9994 (c)

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Development and Validation of a Comprehensive Synchronous Machine Model for a Real-Time Environment

Cited by 46 publications

References 15 publications

An Improved Analytical Model for Salient Pole Synchronous Machines Under General Eccentricity Fault

An Improved Analytical Model for Salient Pole Synchronous Machines Under General Eccentricity Fault

A Novel Technique for the Computation of Inductances of Salient Pole Machines under Different Eccentricity Conditions

Loss-of-Excitation Protection and Underexcitation Controls Correlation for Synchronous Generators in a Real-Time Digital Simulator

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