Application of STATCOM for Damping Subsynchronous Resonance in a Multi-machine System
- 1 China Electric Power Research Institute, Beijing, China
- 2 China Electric Power Research Institute, Beijing, China
- 3 China Electric Power Research Institute, Beijing, China
- 4 China Electric Power Research Institute, Beijing, China
Abstract
Results of an investigation on the application of STATCOM for damping subsynchronous resonance (SSR) in a multi-machine system is presented in this paper. For a multi-machine system which has a set of identical parallel turbine-generators or non-identical turbine-generators having torsional modes of the same frequency, generators may suffer from the same mode of torsional interaction corresponding to a certain series compensation degrees. Generators in such system may have different oscillation behaviors when they are unequally loaded or have different shaft and electrical parameters. Serving as the grid-side equipment, the reactive power output of a STATCOM could have an impact on all generators electrical distance nearby. Thus a single STATCOM could be used to damp torsional interactions of multi - generators when additional proper control strategy is supplemented. In this paper, control strategy of using STATCOM to damp SSR in a multi-machine system is designed and its effectiveness is validated based on a modified IEEE second benchmark model.
- Zheng Chao, Tang Xiaojun, Ma Shiying. “Analysis on Subsynchronous Oscillation damping characteristics of a SVC Light,” Electric Power, Vol. 43, No. 8, 2010, pp. 34-39.
- M.R.Iravani. “Torsional Oscillations of Unequally-loaded Parallel Identical Turbine-generators,” IEEE Trans on Power Systems, Vol. 4, No. 4, 1989, pp. 1514-1524.
- G.D.Jennings, R.G.Harley. “Torsional Interaction Between Non-identical Turbine Generators,” IEEE Trans on Power Systems, Vol. 5, No. 1, 1990, pp. 133-139.
- Li Zhipeng, Xie Xiaorong. “STAT-COM-SSR Damping Control Method Based on Dynamic Compensation of currents at Complementary Frequen-cies to Torsional Modes,” Proceedings of the CSEE, Vol. 30, No. 34, 2010, pp. 22-27.
- K.R.Padiyar, Nagesh Prabhu. “Design and Performance evaluation of Sub-synchronous Damping Controller with STATCOM,” IEEE Trans on Power Delivery, Vol. 21, No. 3, 2006, pp. 1398-1405.
- Nagesh Prabhu, M.Janaki, R.Thirumalaivasan. “Damping of Subsynchronous Re-sonance by Subsynchronous Current Injector with STATCOM,” TENCON 2009 - 2009 IEEE Region 10 Conference, Singapore, 23-26 Jan. 2009, pp. 1-6.
- Jennings G.D., Grad S.A., Harley R.G., et al. “Subsynchronous resonance of a power station with two identical generating units,” IEEE Proceeding, Vol. 133, No. 1, 1986, pp. 33-43.
- IEEE Subsynchronous Resonance Working Group. “Second benchmark model for computer simulation of Subsynchronous resonance,” IEEE Transactions on Power Apparatus and Systems, Vol. 104, No. 5, 1985, pp. 1057-1066.
- Canay I M.A. “Novel Approach to the torsional interaction and electrical damping of the synchronous machine: Part one-theory,” IEEE Transactions on Power Apparatus and Systems, Vol. 101, No. 10, 1982, pp. 3630-3638.
- Canay I M.A. “Novel Approach to the torsional interaction and electrical damping of the syn-chronous machine: Part two-application to an arbitrary Network,” IEEE Transactions on Power Apparatus and Systems, Vol. 101, No. 10, 1982, pp. 3639-3646.
- Xu Zheng. “The complex torque coef-ficient approach’s applicability analysis and its realiza-tion by time domain simulation,” Proceedings of the CSEE, Vol. 20, No. 6, 2000, pp. 1-4.
- K.V. Patil, J. Senthil, J. Jiang and R.M. Mathur. “Application of STATCOM for damping torsional oscillations in series compensated AC systems,” IEEE Transactions on Ener-gy Conversion, Vol. 13, No. 3, 1998, pp. 237-243.