Depressing Turbine-Generator Supersynchronous Torsional Torques by Using Virtual Inertia
Single-pole switching scheme is widely used in the
Extra High Voltage system. However, the substantial negativesequence
current injected to the turbine-generators imposes the
electromagnetic (E/M) torque of double system- frequency
components during the dead time (between single-pole clearing and
line reclosing). This would induce supersynchronous resonance
(SPSR) torque amplifications on low pressure turbine generator
blades and even lead to fatigue damage. This paper proposes the
design of a mechanical filter (MF) with natural frequency close to
double-system frequency. From the simulation results, it is found that
such a filter not only successfully damps the resonant effect, but also
has the characteristics of feasibility and compact.
[1] E. W. Kimbark, "Suppression of grounding fault arc on single-pole
switched EHV lines by shunt reactor," IEEE Trans. PAS., vol. 83, pp.
285-290, March 1964.
[2] J. I. Tsai, "A New Single-Pole Switching Technique for Suppressing
Turbine-Generator Torsional Vibrations and Enhancing Power Stability
and Continuity," IET Proceedings - Generation, Transmission and
Distribution, vol. 1, no. 5, pp. 804-810, Sept. 2007.
[3] S. O. Faried, "An adaptive short time compensation scheme for
improving power system stability and reducing turbine-generator shaft
torsional," IEEE Trans. Power Systems, Vol. 15, No. 2, pp. 785-790,
2000.
[4] J. Gonzalez, G. C. Kung, C. Raczkowski, C. W. Taylor and D. Thonn,
"Effects of single- and three-pole switching and high-speed reclosing on
turbogenerator shafts and blades," IEEE Trans. Power Apparatus and
Systems, vol.103, no. 11, pp. 3218-3228, 1984.
[5] Power System Blockset for Use With Simulink User-s Guide, June 2001.
[6] Slow Transient Task Force of IEEE Working Group, "Modelling and
analysis guidelines for slow transients. Part I. Torsional oscillations;
transient torques; turbine blade vibrations; fast bus transfer," IEEE
Trans. Power Delivery, vol. 10, no. 4, 1995.
[7] R Gerber, Theory of Electroacoustics, Salford, New York, pp.1-56,
1979.
[8] J. J. Grainger and W. D. Stevenson, "Power system analysis," McGraw-
Hill, Inc. 1994.
[1] E. W. Kimbark, "Suppression of grounding fault arc on single-pole
switched EHV lines by shunt reactor," IEEE Trans. PAS., vol. 83, pp.
285-290, March 1964.
[2] J. I. Tsai, "A New Single-Pole Switching Technique for Suppressing
Turbine-Generator Torsional Vibrations and Enhancing Power Stability
and Continuity," IET Proceedings - Generation, Transmission and
Distribution, vol. 1, no. 5, pp. 804-810, Sept. 2007.
[3] S. O. Faried, "An adaptive short time compensation scheme for
improving power system stability and reducing turbine-generator shaft
torsional," IEEE Trans. Power Systems, Vol. 15, No. 2, pp. 785-790,
2000.
[4] J. Gonzalez, G. C. Kung, C. Raczkowski, C. W. Taylor and D. Thonn,
"Effects of single- and three-pole switching and high-speed reclosing on
turbogenerator shafts and blades," IEEE Trans. Power Apparatus and
Systems, vol.103, no. 11, pp. 3218-3228, 1984.
[5] Power System Blockset for Use With Simulink User-s Guide, June 2001.
[6] Slow Transient Task Force of IEEE Working Group, "Modelling and
analysis guidelines for slow transients. Part I. Torsional oscillations;
transient torques; turbine blade vibrations; fast bus transfer," IEEE
Trans. Power Delivery, vol. 10, no. 4, 1995.
[7] R Gerber, Theory of Electroacoustics, Salford, New York, pp.1-56,
1979.
[8] J. J. Grainger and W. D. Stevenson, "Power system analysis," McGraw-
Hill, Inc. 1994.
@article{"International Journal of Electrical, Electronic and Communication Sciences:56277", author = "Jong-Ian Tsai and Chi-Chuan Chen and Tung-Sheng Zhan and Rong-Ching Wu", title = "Depressing Turbine-Generator Supersynchronous Torsional Torques by Using Virtual Inertia", abstract = "Single-pole switching scheme is widely used in the
Extra High Voltage system. However, the substantial negativesequence
current injected to the turbine-generators imposes the
electromagnetic (E/M) torque of double system- frequency
components during the dead time (between single-pole clearing and
line reclosing). This would induce supersynchronous resonance
(SPSR) torque amplifications on low pressure turbine generator
blades and even lead to fatigue damage. This paper proposes the
design of a mechanical filter (MF) with natural frequency close to
double-system frequency. From the simulation results, it is found that
such a filter not only successfully damps the resonant effect, but also
has the characteristics of feasibility and compact.", keywords = "Single-pole, Supersynchronous, Blade, Unbalance, filter", volume = "4", number = "5", pages = "828-4", }