An Online Measurement Approach of Generators' Torsional Mechanical Damping Coefficients for Subsynchronous Oscillation Analysis
The series compensation capacitor and HVDC are widely used in Chinese power grids to increase the transmission capability of long distance lines, which might cause subsynchronous oscillation (SSO) between the turbine generators and power systems. The torsional mechanical damping coefficient of a tur...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Peng Zhang [verfasserIn] |
|---|
| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2015 |
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| Übergeordnetes Werk: |
Enthalten in: IEEE transactions on power systems - New York, NY : IEEE, 1986, 30(2015), 2, Seite 585-592 |
|---|---|
| Übergeordnetes Werk: |
volume:30 ; year:2015 ; number:2 ; pages:585-592 |
| Links: |
|---|
| DOI / URN: |
10.1109/TPWRS.2014.2330581 |
|---|
| Katalog-ID: |
OLC1957850981 |
|---|
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| 245 | 1 | 3 | |a An Online Measurement Approach of Generators' Torsional Mechanical Damping Coefficients for Subsynchronous Oscillation Analysis |
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| 520 | |a The series compensation capacitor and HVDC are widely used in Chinese power grids to increase the transmission capability of long distance lines, which might cause subsynchronous oscillation (SSO) between the turbine generators and power systems. The torsional mechanical damping coefficient of a turbine generator reflects the inherent damping level of the shaft and, thus, is a critical factor in SSO analysis. However, the torsional mechanical damping coefficient under practical operating conditions is difficult to obtain from the design parameters. In this paper, a novel approach is developed for online torsional mechanical damping coefficient measurements. The torsional interaction mechanism of identical parallel connected turbine generators is investigated, and then the characteristics of in-phase mode (IPM) and anti-phase mode (APM) are described. From this analysis, an active stimulating method for APM is presented, and a practical scheme for online torsional mechanical damping coefficient measurement is designed. This approach takes advantage of the APM features and decouples the generators from the grid. Moreover, the proposed approach has been implemented in the Yimin power plant in Inner Mongolia to realize online measurement of the torsional mechanical damping coefficient. Field test results are presented to demonstrate the effectiveness of the proposed approach. | ||
| 650 | 4 | |a Shafts | |
| 650 | 4 | |a torsional mechanical damping coefficient | |
| 650 | 4 | |a identical turbine generators | |
| 650 | 4 | |a generator torsional mechanical damping coefficients | |
| 650 | 4 | |a inphase mode | |
| 650 | 4 | |a Generators | |
| 650 | 4 | |a identical parallel connected turbine generators | |
| 650 | 4 | |a subsynchronous oscillation | |
| 650 | 4 | |a oscillations | |
| 650 | 4 | |a APM | |
| 650 | 4 | |a anti-phase mode | |
| 650 | 4 | |a Active stimulation | |
| 650 | 4 | |a subsynchronous oscillation analysis | |
| 650 | 4 | |a online measurement approach | |
| 650 | 4 | |a Inner Mongolia | |
| 650 | 4 | |a SSO | |
| 650 | 4 | |a torsional interaction mechanism | |
| 650 | 4 | |a damping | |
| 650 | 4 | |a Oscillators | |
| 650 | 4 | |a turbogenerators | |
| 650 | 4 | |a Yimin power plant | |
| 650 | 4 | |a IPM | |
| 650 | 4 | |a Turbines | |
| 650 | 4 | |a field measurement | |
| 650 | 4 | |a Couplings | |
| 650 | 4 | |a Mechanical variables measurement | |
| 650 | 4 | |a online torsional mechanical damping coefficient measurements | |
| 650 | 4 | |a antiphase mode | |
| 650 | 4 | |a Power plants | |
| 700 | 0 | |a Tianshu Bi |4 oth | |
| 700 | 0 | |a Shiwu Xiao |4 oth | |
| 700 | 0 | |a Ancheng Xue |4 oth | |
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10.1109/TPWRS.2014.2330581 doi PQ20160617 (DE-627)OLC1957850981 (DE-599)GBVOLC1957850981 (PRQ)c2644-2aff18c419a1e4b4fd18ba93515a46f7b55af0af6c1834ea37fd424569dd6e760 (KEY)0163645620150000030000200585onlinemeasurementapproachofgeneratorstorsionalmech DE-627 ger DE-627 rakwb eng 620 DNB 53.00 bkl 53.30 bkl Peng Zhang verfasserin aut An Online Measurement Approach of Generators' Torsional Mechanical Damping Coefficients for Subsynchronous Oscillation Analysis 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The series compensation capacitor and HVDC are widely used in Chinese power grids to increase the transmission capability of long distance lines, which might cause subsynchronous oscillation (SSO) between the turbine generators and power systems. The torsional mechanical damping coefficient of a turbine generator reflects the inherent damping level of the shaft and, thus, is a critical factor in SSO analysis. However, the torsional mechanical damping coefficient under practical operating conditions is difficult to obtain from the design parameters. In this paper, a novel approach is developed for online torsional mechanical damping coefficient measurements. The torsional interaction mechanism of identical parallel connected turbine generators is investigated, and then the characteristics of in-phase mode (IPM) and anti-phase mode (APM) are described. From this analysis, an active stimulating method for APM is presented, and a practical scheme for online torsional mechanical damping coefficient measurement is designed. This approach takes advantage of the APM features and decouples the generators from the grid. Moreover, the proposed approach has been implemented in the Yimin power plant in Inner Mongolia to realize online measurement of the torsional mechanical damping coefficient. Field test results are presented to demonstrate the effectiveness of the proposed approach. Shafts torsional mechanical damping coefficient identical turbine generators generator torsional mechanical damping coefficients inphase mode Generators identical parallel connected turbine generators subsynchronous oscillation oscillations APM anti-phase mode Active stimulation subsynchronous oscillation analysis online measurement approach Inner Mongolia SSO torsional interaction mechanism damping Oscillators turbogenerators Yimin power plant IPM Turbines field measurement Couplings Mechanical variables measurement online torsional mechanical damping coefficient measurements antiphase mode Power plants Tianshu Bi oth Shiwu Xiao oth Ancheng Xue oth Enthalten in IEEE transactions on power systems New York, NY : IEEE, 1986 30(2015), 2, Seite 585-592 (DE-627)129582344 (DE-600)232866-5 (DE-576)015075893 0885-8950 nnns volume:30 year:2015 number:2 pages:585-592 http://dx.doi.org/10.1109/TPWRS.2014.2330581 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6847749 http://search.proquest.com/docview/1658638765 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_30 GBV_ILN_70 GBV_ILN_105 GBV_ILN_2014 GBV_ILN_2016 53.00 AVZ 53.30 AVZ AR 30 2015 2 585-592 |
| spelling |
10.1109/TPWRS.2014.2330581 doi PQ20160617 (DE-627)OLC1957850981 (DE-599)GBVOLC1957850981 (PRQ)c2644-2aff18c419a1e4b4fd18ba93515a46f7b55af0af6c1834ea37fd424569dd6e760 (KEY)0163645620150000030000200585onlinemeasurementapproachofgeneratorstorsionalmech DE-627 ger DE-627 rakwb eng 620 DNB 53.00 bkl 53.30 bkl Peng Zhang verfasserin aut An Online Measurement Approach of Generators' Torsional Mechanical Damping Coefficients for Subsynchronous Oscillation Analysis 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The series compensation capacitor and HVDC are widely used in Chinese power grids to increase the transmission capability of long distance lines, which might cause subsynchronous oscillation (SSO) between the turbine generators and power systems. The torsional mechanical damping coefficient of a turbine generator reflects the inherent damping level of the shaft and, thus, is a critical factor in SSO analysis. However, the torsional mechanical damping coefficient under practical operating conditions is difficult to obtain from the design parameters. In this paper, a novel approach is developed for online torsional mechanical damping coefficient measurements. The torsional interaction mechanism of identical parallel connected turbine generators is investigated, and then the characteristics of in-phase mode (IPM) and anti-phase mode (APM) are described. From this analysis, an active stimulating method for APM is presented, and a practical scheme for online torsional mechanical damping coefficient measurement is designed. This approach takes advantage of the APM features and decouples the generators from the grid. Moreover, the proposed approach has been implemented in the Yimin power plant in Inner Mongolia to realize online measurement of the torsional mechanical damping coefficient. Field test results are presented to demonstrate the effectiveness of the proposed approach. Shafts torsional mechanical damping coefficient identical turbine generators generator torsional mechanical damping coefficients inphase mode Generators identical parallel connected turbine generators subsynchronous oscillation oscillations APM anti-phase mode Active stimulation subsynchronous oscillation analysis online measurement approach Inner Mongolia SSO torsional interaction mechanism damping Oscillators turbogenerators Yimin power plant IPM Turbines field measurement Couplings Mechanical variables measurement online torsional mechanical damping coefficient measurements antiphase mode Power plants Tianshu Bi oth Shiwu Xiao oth Ancheng Xue oth Enthalten in IEEE transactions on power systems New York, NY : IEEE, 1986 30(2015), 2, Seite 585-592 (DE-627)129582344 (DE-600)232866-5 (DE-576)015075893 0885-8950 nnns volume:30 year:2015 number:2 pages:585-592 http://dx.doi.org/10.1109/TPWRS.2014.2330581 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6847749 http://search.proquest.com/docview/1658638765 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_30 GBV_ILN_70 GBV_ILN_105 GBV_ILN_2014 GBV_ILN_2016 53.00 AVZ 53.30 AVZ AR 30 2015 2 585-592 |
| allfields_unstemmed |
10.1109/TPWRS.2014.2330581 doi PQ20160617 (DE-627)OLC1957850981 (DE-599)GBVOLC1957850981 (PRQ)c2644-2aff18c419a1e4b4fd18ba93515a46f7b55af0af6c1834ea37fd424569dd6e760 (KEY)0163645620150000030000200585onlinemeasurementapproachofgeneratorstorsionalmech DE-627 ger DE-627 rakwb eng 620 DNB 53.00 bkl 53.30 bkl Peng Zhang verfasserin aut An Online Measurement Approach of Generators' Torsional Mechanical Damping Coefficients for Subsynchronous Oscillation Analysis 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The series compensation capacitor and HVDC are widely used in Chinese power grids to increase the transmission capability of long distance lines, which might cause subsynchronous oscillation (SSO) between the turbine generators and power systems. The torsional mechanical damping coefficient of a turbine generator reflects the inherent damping level of the shaft and, thus, is a critical factor in SSO analysis. However, the torsional mechanical damping coefficient under practical operating conditions is difficult to obtain from the design parameters. In this paper, a novel approach is developed for online torsional mechanical damping coefficient measurements. The torsional interaction mechanism of identical parallel connected turbine generators is investigated, and then the characteristics of in-phase mode (IPM) and anti-phase mode (APM) are described. From this analysis, an active stimulating method for APM is presented, and a practical scheme for online torsional mechanical damping coefficient measurement is designed. This approach takes advantage of the APM features and decouples the generators from the grid. Moreover, the proposed approach has been implemented in the Yimin power plant in Inner Mongolia to realize online measurement of the torsional mechanical damping coefficient. Field test results are presented to demonstrate the effectiveness of the proposed approach. Shafts torsional mechanical damping coefficient identical turbine generators generator torsional mechanical damping coefficients inphase mode Generators identical parallel connected turbine generators subsynchronous oscillation oscillations APM anti-phase mode Active stimulation subsynchronous oscillation analysis online measurement approach Inner Mongolia SSO torsional interaction mechanism damping Oscillators turbogenerators Yimin power plant IPM Turbines field measurement Couplings Mechanical variables measurement online torsional mechanical damping coefficient measurements antiphase mode Power plants Tianshu Bi oth Shiwu Xiao oth Ancheng Xue oth Enthalten in IEEE transactions on power systems New York, NY : IEEE, 1986 30(2015), 2, Seite 585-592 (DE-627)129582344 (DE-600)232866-5 (DE-576)015075893 0885-8950 nnns volume:30 year:2015 number:2 pages:585-592 http://dx.doi.org/10.1109/TPWRS.2014.2330581 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6847749 http://search.proquest.com/docview/1658638765 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_30 GBV_ILN_70 GBV_ILN_105 GBV_ILN_2014 GBV_ILN_2016 53.00 AVZ 53.30 AVZ AR 30 2015 2 585-592 |
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10.1109/TPWRS.2014.2330581 doi PQ20160617 (DE-627)OLC1957850981 (DE-599)GBVOLC1957850981 (PRQ)c2644-2aff18c419a1e4b4fd18ba93515a46f7b55af0af6c1834ea37fd424569dd6e760 (KEY)0163645620150000030000200585onlinemeasurementapproachofgeneratorstorsionalmech DE-627 ger DE-627 rakwb eng 620 DNB 53.00 bkl 53.30 bkl Peng Zhang verfasserin aut An Online Measurement Approach of Generators' Torsional Mechanical Damping Coefficients for Subsynchronous Oscillation Analysis 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The series compensation capacitor and HVDC are widely used in Chinese power grids to increase the transmission capability of long distance lines, which might cause subsynchronous oscillation (SSO) between the turbine generators and power systems. The torsional mechanical damping coefficient of a turbine generator reflects the inherent damping level of the shaft and, thus, is a critical factor in SSO analysis. However, the torsional mechanical damping coefficient under practical operating conditions is difficult to obtain from the design parameters. In this paper, a novel approach is developed for online torsional mechanical damping coefficient measurements. The torsional interaction mechanism of identical parallel connected turbine generators is investigated, and then the characteristics of in-phase mode (IPM) and anti-phase mode (APM) are described. From this analysis, an active stimulating method for APM is presented, and a practical scheme for online torsional mechanical damping coefficient measurement is designed. This approach takes advantage of the APM features and decouples the generators from the grid. Moreover, the proposed approach has been implemented in the Yimin power plant in Inner Mongolia to realize online measurement of the torsional mechanical damping coefficient. Field test results are presented to demonstrate the effectiveness of the proposed approach. Shafts torsional mechanical damping coefficient identical turbine generators generator torsional mechanical damping coefficients inphase mode Generators identical parallel connected turbine generators subsynchronous oscillation oscillations APM anti-phase mode Active stimulation subsynchronous oscillation analysis online measurement approach Inner Mongolia SSO torsional interaction mechanism damping Oscillators turbogenerators Yimin power plant IPM Turbines field measurement Couplings Mechanical variables measurement online torsional mechanical damping coefficient measurements antiphase mode Power plants Tianshu Bi oth Shiwu Xiao oth Ancheng Xue oth Enthalten in IEEE transactions on power systems New York, NY : IEEE, 1986 30(2015), 2, Seite 585-592 (DE-627)129582344 (DE-600)232866-5 (DE-576)015075893 0885-8950 nnns volume:30 year:2015 number:2 pages:585-592 http://dx.doi.org/10.1109/TPWRS.2014.2330581 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6847749 http://search.proquest.com/docview/1658638765 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_30 GBV_ILN_70 GBV_ILN_105 GBV_ILN_2014 GBV_ILN_2016 53.00 AVZ 53.30 AVZ AR 30 2015 2 585-592 |
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10.1109/TPWRS.2014.2330581 doi PQ20160617 (DE-627)OLC1957850981 (DE-599)GBVOLC1957850981 (PRQ)c2644-2aff18c419a1e4b4fd18ba93515a46f7b55af0af6c1834ea37fd424569dd6e760 (KEY)0163645620150000030000200585onlinemeasurementapproachofgeneratorstorsionalmech DE-627 ger DE-627 rakwb eng 620 DNB 53.00 bkl 53.30 bkl Peng Zhang verfasserin aut An Online Measurement Approach of Generators' Torsional Mechanical Damping Coefficients for Subsynchronous Oscillation Analysis 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The series compensation capacitor and HVDC are widely used in Chinese power grids to increase the transmission capability of long distance lines, which might cause subsynchronous oscillation (SSO) between the turbine generators and power systems. The torsional mechanical damping coefficient of a turbine generator reflects the inherent damping level of the shaft and, thus, is a critical factor in SSO analysis. However, the torsional mechanical damping coefficient under practical operating conditions is difficult to obtain from the design parameters. In this paper, a novel approach is developed for online torsional mechanical damping coefficient measurements. The torsional interaction mechanism of identical parallel connected turbine generators is investigated, and then the characteristics of in-phase mode (IPM) and anti-phase mode (APM) are described. From this analysis, an active stimulating method for APM is presented, and a practical scheme for online torsional mechanical damping coefficient measurement is designed. This approach takes advantage of the APM features and decouples the generators from the grid. Moreover, the proposed approach has been implemented in the Yimin power plant in Inner Mongolia to realize online measurement of the torsional mechanical damping coefficient. Field test results are presented to demonstrate the effectiveness of the proposed approach. Shafts torsional mechanical damping coefficient identical turbine generators generator torsional mechanical damping coefficients inphase mode Generators identical parallel connected turbine generators subsynchronous oscillation oscillations APM anti-phase mode Active stimulation subsynchronous oscillation analysis online measurement approach Inner Mongolia SSO torsional interaction mechanism damping Oscillators turbogenerators Yimin power plant IPM Turbines field measurement Couplings Mechanical variables measurement online torsional mechanical damping coefficient measurements antiphase mode Power plants Tianshu Bi oth Shiwu Xiao oth Ancheng Xue oth Enthalten in IEEE transactions on power systems New York, NY : IEEE, 1986 30(2015), 2, Seite 585-592 (DE-627)129582344 (DE-600)232866-5 (DE-576)015075893 0885-8950 nnns volume:30 year:2015 number:2 pages:585-592 http://dx.doi.org/10.1109/TPWRS.2014.2330581 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6847749 http://search.proquest.com/docview/1658638765 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_30 GBV_ILN_70 GBV_ILN_105 GBV_ILN_2014 GBV_ILN_2016 53.00 AVZ 53.30 AVZ AR 30 2015 2 585-592 |
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Peng Zhang |
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Peng Zhang ddc 620 bkl 53.00 bkl 53.30 misc Shafts misc torsional mechanical damping coefficient misc identical turbine generators misc generator torsional mechanical damping coefficients misc inphase mode misc Generators misc identical parallel connected turbine generators misc subsynchronous oscillation misc oscillations misc APM misc anti-phase mode misc Active stimulation misc subsynchronous oscillation analysis misc online measurement approach misc Inner Mongolia misc SSO misc torsional interaction mechanism misc damping misc Oscillators misc turbogenerators misc Yimin power plant misc IPM misc Turbines misc field measurement misc Couplings misc Mechanical variables measurement misc online torsional mechanical damping coefficient measurements misc antiphase mode misc Power plants An Online Measurement Approach of Generators' Torsional Mechanical Damping Coefficients for Subsynchronous Oscillation Analysis |
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620 DNB 53.00 bkl 53.30 bkl An Online Measurement Approach of Generators' Torsional Mechanical Damping Coefficients for Subsynchronous Oscillation Analysis Shafts torsional mechanical damping coefficient identical turbine generators generator torsional mechanical damping coefficients inphase mode Generators identical parallel connected turbine generators subsynchronous oscillation oscillations APM anti-phase mode Active stimulation subsynchronous oscillation analysis online measurement approach Inner Mongolia SSO torsional interaction mechanism damping Oscillators turbogenerators Yimin power plant IPM Turbines field measurement Couplings Mechanical variables measurement online torsional mechanical damping coefficient measurements antiphase mode Power plants |
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ddc 620 bkl 53.00 bkl 53.30 misc Shafts misc torsional mechanical damping coefficient misc identical turbine generators misc generator torsional mechanical damping coefficients misc inphase mode misc Generators misc identical parallel connected turbine generators misc subsynchronous oscillation misc oscillations misc APM misc anti-phase mode misc Active stimulation misc subsynchronous oscillation analysis misc online measurement approach misc Inner Mongolia misc SSO misc torsional interaction mechanism misc damping misc Oscillators misc turbogenerators misc Yimin power plant misc IPM misc Turbines misc field measurement misc Couplings misc Mechanical variables measurement misc online torsional mechanical damping coefficient measurements misc antiphase mode misc Power plants |
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ddc 620 bkl 53.00 bkl 53.30 misc Shafts misc torsional mechanical damping coefficient misc identical turbine generators misc generator torsional mechanical damping coefficients misc inphase mode misc Generators misc identical parallel connected turbine generators misc subsynchronous oscillation misc oscillations misc APM misc anti-phase mode misc Active stimulation misc subsynchronous oscillation analysis misc online measurement approach misc Inner Mongolia misc SSO misc torsional interaction mechanism misc damping misc Oscillators misc turbogenerators misc Yimin power plant misc IPM misc Turbines misc field measurement misc Couplings misc Mechanical variables measurement misc online torsional mechanical damping coefficient measurements misc antiphase mode misc Power plants |
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ddc 620 bkl 53.00 bkl 53.30 misc Shafts misc torsional mechanical damping coefficient misc identical turbine generators misc generator torsional mechanical damping coefficients misc inphase mode misc Generators misc identical parallel connected turbine generators misc subsynchronous oscillation misc oscillations misc APM misc anti-phase mode misc Active stimulation misc subsynchronous oscillation analysis misc online measurement approach misc Inner Mongolia misc SSO misc torsional interaction mechanism misc damping misc Oscillators misc turbogenerators misc Yimin power plant misc IPM misc Turbines misc field measurement misc Couplings misc Mechanical variables measurement misc online torsional mechanical damping coefficient measurements misc antiphase mode misc Power plants |
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online measurement approach of generators' torsional mechanical damping coefficients for subsynchronous oscillation analysis |
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An Online Measurement Approach of Generators' Torsional Mechanical Damping Coefficients for Subsynchronous Oscillation Analysis |
| abstract |
The series compensation capacitor and HVDC are widely used in Chinese power grids to increase the transmission capability of long distance lines, which might cause subsynchronous oscillation (SSO) between the turbine generators and power systems. The torsional mechanical damping coefficient of a turbine generator reflects the inherent damping level of the shaft and, thus, is a critical factor in SSO analysis. However, the torsional mechanical damping coefficient under practical operating conditions is difficult to obtain from the design parameters. In this paper, a novel approach is developed for online torsional mechanical damping coefficient measurements. The torsional interaction mechanism of identical parallel connected turbine generators is investigated, and then the characteristics of in-phase mode (IPM) and anti-phase mode (APM) are described. From this analysis, an active stimulating method for APM is presented, and a practical scheme for online torsional mechanical damping coefficient measurement is designed. This approach takes advantage of the APM features and decouples the generators from the grid. Moreover, the proposed approach has been implemented in the Yimin power plant in Inner Mongolia to realize online measurement of the torsional mechanical damping coefficient. Field test results are presented to demonstrate the effectiveness of the proposed approach. |
| abstractGer |
The series compensation capacitor and HVDC are widely used in Chinese power grids to increase the transmission capability of long distance lines, which might cause subsynchronous oscillation (SSO) between the turbine generators and power systems. The torsional mechanical damping coefficient of a turbine generator reflects the inherent damping level of the shaft and, thus, is a critical factor in SSO analysis. However, the torsional mechanical damping coefficient under practical operating conditions is difficult to obtain from the design parameters. In this paper, a novel approach is developed for online torsional mechanical damping coefficient measurements. The torsional interaction mechanism of identical parallel connected turbine generators is investigated, and then the characteristics of in-phase mode (IPM) and anti-phase mode (APM) are described. From this analysis, an active stimulating method for APM is presented, and a practical scheme for online torsional mechanical damping coefficient measurement is designed. This approach takes advantage of the APM features and decouples the generators from the grid. Moreover, the proposed approach has been implemented in the Yimin power plant in Inner Mongolia to realize online measurement of the torsional mechanical damping coefficient. Field test results are presented to demonstrate the effectiveness of the proposed approach. |
| abstract_unstemmed |
The series compensation capacitor and HVDC are widely used in Chinese power grids to increase the transmission capability of long distance lines, which might cause subsynchronous oscillation (SSO) between the turbine generators and power systems. The torsional mechanical damping coefficient of a turbine generator reflects the inherent damping level of the shaft and, thus, is a critical factor in SSO analysis. However, the torsional mechanical damping coefficient under practical operating conditions is difficult to obtain from the design parameters. In this paper, a novel approach is developed for online torsional mechanical damping coefficient measurements. The torsional interaction mechanism of identical parallel connected turbine generators is investigated, and then the characteristics of in-phase mode (IPM) and anti-phase mode (APM) are described. From this analysis, an active stimulating method for APM is presented, and a practical scheme for online torsional mechanical damping coefficient measurement is designed. This approach takes advantage of the APM features and decouples the generators from the grid. Moreover, the proposed approach has been implemented in the Yimin power plant in Inner Mongolia to realize online measurement of the torsional mechanical damping coefficient. Field test results are presented to demonstrate the effectiveness of the proposed approach. |
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An Online Measurement Approach of Generators' Torsional Mechanical Damping Coefficients for Subsynchronous Oscillation Analysis |
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