Impedance-Based Prediction of SSR-Generated Harmonics in Doubly-Fed Induction Generators: Preprint

Shahil Shah; Vahan Gevorgian; Hanchao Liu

Impedance-Based Prediction of SSR-Generated Harmonics in Doubly-Fed Induction Generators: Preprint

Shahil Shah, Vahan Gevorgian, Hanchao Liu

Power Systems Engineering

General Electric

Research output: Contribution to conference › Paper

Abstract

Doubly-fed induction generators (DFIGs) are prone to subsynchronous resonance (SSR) with series-compensated transmission lines and experiencing SSR-generated harmonics of wide-ranging magnitudes. This paper presents a large-signal impedance-based approach for the prediction of the magnitude of SSR-generated harmonics in DFIGs. Note that the large-signal impedance of a network shows the variation in its impedance response with the magnitude of perturbation at its terminals. It is discovered in this paper that the impedance of a series-compensated transmission line starts changing with the magnitude of SSR because of the metal oxide varistor (MOV) based protection of series capacitors in the line. The changing line impedance locks the growth of SSR beyond a certain point, where the DFIG forms a limit cycle mode and emits harmonics at the SSR frequency. The discovered role of the protection of series-capacitors in SSR not only enables the prediction of the SSR-generated harmonics but it can also be used for the timely detection of an SSR event to avoid system disruption and sudden loss of a bulk generation. The large-signal impedance-based prediction of SSR-generated harmonics in DFIG-based wind and hydro generators is demonstrated using numerical simulations of a 2.5-MW, 690-V DFIG supplying to a series-compensated transmission line.

Original language	American English
Number of pages	8
State	Published - 2019
Event	2019 IEEE Power and Energy Society General Meeting (IEEE PES GM) - Atlanta, Georgia Duration: 4 Aug 2019 → 8 Aug 2019

Conference

Conference	2019 IEEE Power and Energy Society General Meeting (IEEE PES GM)
City	Atlanta, Georgia
Period	4/08/19 → 8/08/19

Bibliographical note

See NREL/CP-5D00-76219 for paper as published in IEEE proceedings

NREL Publication Number

NREL/CP-5D00-72559

Keywords

DFIG
doubly-fed induction generator
impedance analysis
MOV
series-compensated lines
small hydro-generators
SSR
Type III wind turbines

Access to Document

https://www.nrel.gov/docs/fy19osti/72559.pdf

Cite this

@conference{a0d110ae56a242b9ae7efafb36f6c959,

title = "Impedance-Based Prediction of SSR-Generated Harmonics in Doubly-Fed Induction Generators: Preprint",

abstract = "Doubly-fed induction generators (DFIGs) are prone to subsynchronous resonance (SSR) with series-compensated transmission lines and experiencing SSR-generated harmonics of wide-ranging magnitudes. This paper presents a large-signal impedance-based approach for the prediction of the magnitude of SSR-generated harmonics in DFIGs. Note that the large-signal impedance of a network shows the variation in its impedance response with the magnitude of perturbation at its terminals. It is discovered in this paper that the impedance of a series-compensated transmission line starts changing with the magnitude of SSR because of the metal oxide varistor (MOV) based protection of series capacitors in the line. The changing line impedance locks the growth of SSR beyond a certain point, where the DFIG forms a limit cycle mode and emits harmonics at the SSR frequency. The discovered role of the protection of series-capacitors in SSR not only enables the prediction of the SSR-generated harmonics but it can also be used for the timely detection of an SSR event to avoid system disruption and sudden loss of a bulk generation. The large-signal impedance-based prediction of SSR-generated harmonics in DFIG-based wind and hydro generators is demonstrated using numerical simulations of a 2.5-MW, 690-V DFIG supplying to a series-compensated transmission line.",

keywords = "DFIG, doubly-fed induction generator, impedance analysis, MOV, series-compensated lines, small hydro-generators, SSR, Type III wind turbines",

author = "Shahil Shah and Vahan Gevorgian and Hanchao Liu",

note = "See NREL/CP-5D00-76219 for paper as published in IEEE proceedings; 2019 IEEE Power and Energy Society General Meeting (IEEE PES GM) ; Conference date: 04-08-2019 Through 08-08-2019",

year = "2019",

language = "American English",

}

TY - CONF

T1 - Impedance-Based Prediction of SSR-Generated Harmonics in Doubly-Fed Induction Generators: Preprint

AU - Shah, Shahil

AU - Gevorgian, Vahan

AU - Liu, Hanchao

N1 - See NREL/CP-5D00-76219 for paper as published in IEEE proceedings

PY - 2019

Y1 - 2019

N2 - Doubly-fed induction generators (DFIGs) are prone to subsynchronous resonance (SSR) with series-compensated transmission lines and experiencing SSR-generated harmonics of wide-ranging magnitudes. This paper presents a large-signal impedance-based approach for the prediction of the magnitude of SSR-generated harmonics in DFIGs. Note that the large-signal impedance of a network shows the variation in its impedance response with the magnitude of perturbation at its terminals. It is discovered in this paper that the impedance of a series-compensated transmission line starts changing with the magnitude of SSR because of the metal oxide varistor (MOV) based protection of series capacitors in the line. The changing line impedance locks the growth of SSR beyond a certain point, where the DFIG forms a limit cycle mode and emits harmonics at the SSR frequency. The discovered role of the protection of series-capacitors in SSR not only enables the prediction of the SSR-generated harmonics but it can also be used for the timely detection of an SSR event to avoid system disruption and sudden loss of a bulk generation. The large-signal impedance-based prediction of SSR-generated harmonics in DFIG-based wind and hydro generators is demonstrated using numerical simulations of a 2.5-MW, 690-V DFIG supplying to a series-compensated transmission line.

AB - Doubly-fed induction generators (DFIGs) are prone to subsynchronous resonance (SSR) with series-compensated transmission lines and experiencing SSR-generated harmonics of wide-ranging magnitudes. This paper presents a large-signal impedance-based approach for the prediction of the magnitude of SSR-generated harmonics in DFIGs. Note that the large-signal impedance of a network shows the variation in its impedance response with the magnitude of perturbation at its terminals. It is discovered in this paper that the impedance of a series-compensated transmission line starts changing with the magnitude of SSR because of the metal oxide varistor (MOV) based protection of series capacitors in the line. The changing line impedance locks the growth of SSR beyond a certain point, where the DFIG forms a limit cycle mode and emits harmonics at the SSR frequency. The discovered role of the protection of series-capacitors in SSR not only enables the prediction of the SSR-generated harmonics but it can also be used for the timely detection of an SSR event to avoid system disruption and sudden loss of a bulk generation. The large-signal impedance-based prediction of SSR-generated harmonics in DFIG-based wind and hydro generators is demonstrated using numerical simulations of a 2.5-MW, 690-V DFIG supplying to a series-compensated transmission line.

KW - DFIG

KW - doubly-fed induction generator

KW - impedance analysis

KW - MOV

KW - series-compensated lines

KW - small hydro-generators

KW - SSR

KW - Type III wind turbines

M3 - Paper

T2 - 2019 IEEE Power and Energy Society General Meeting (IEEE PES GM)

Y2 - 4 August 2019 through 8 August 2019

ER -

Impedance-Based Prediction of SSR-Generated Harmonics in Doubly-Fed Induction Generators: Preprint

Abstract

Conference

Bibliographical note

NREL Publication Number

Keywords

Access to Document

Fingerprint

Cite this