Anti-Jamming Modification of Exciting System in 600MW Generating Unit

Abstract:

In order to reduce excitation system swing and resultant reactive power swing, namely, reduce external electromagnetic interference to stable operation of 600MW generating unit, the paper analyses unit excitation control mode and designs hardware and software of excitation system. First, digital microcomputer control system organization was designed based on nonlinear control theory, which had an increase of control mode such as PID control mode, nonlinear optimum electronic control (NOEC) mode besides original voltage difference and current control mode. Second, full duplex collocation configuration mode of excitation system was designed, namely two controllers were master-slave concurrent, and each controller could meet excitation requirement of various operation condition including constrained excitation. Finally, in electric network disturbance test, measured excitation system parameters recovered stably in 1020 ms such as stator voltage Ut, rotor voltage Uf, comprehensive amplified control voltage Uc, active power P and reactive power Q. It is verified that transient stability and unit operating condition are improved.

• Periodical: Applied Mechanics and Materials (Volumes 303-306)
• Pages: 1291-1296
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.303-306.1291
• Online since: February 2013
• Authors: Zeng Ji Chen, Wei Min Fang, Cong Rong Guan
• Keywords: Field Regulator, Full Duplex Configuration, Nonlinear Control, Undisturbed Switching

References

[1] Mahmud M. A, Hossain M. J, Pota H.R. Selection of output function in nonlinear feedback linearizing excitation control for power systems. Proceedings of the 2011 Australian Control Conference, AUCC 2011, (2011), pp.458-463.

[2] Mahmud M. A, Pota H. R, Hossain M.J. Full-order nonlinear observer-based excitation controller design for interconnected power systems via exact linearization approach. International Journal of Electrical Power and Energy Systems, Vol. 41 (2012).

DOI: 10.1016/j.ijepes.2012.03.007

[3] Rene Meziat, Patiño Diego, Pedregal Pablo. An alternative approach for non-linear optimal control problems based on the method of moments. Computational Optimization and Applications, Vol. 35 (2006), pp.31-40.

DOI: 10.1007/s10589-007-9032-1

[4] Warminski Jerzy. Nonlinear normal modes of a self-excited system driven by parametric and external excitations. Nonlinear Dynamics, Vol. 61 (2010), pp.677-689.

DOI: 10.1007/s11071-010-9679-5

[5] Henri-Francois Raynaud. Delay-based non-linear observers for congestion control in communication networks. Lecture Notes in Control and Information Sciences, Vol. 352 (2007), pp.88-96.

DOI: 10.1007/978-3-540-49556-7_1

[6] Hakan Johansson. Calibration of a class of non-linear viscoelasticity models with adaptive error control. Computational Mechanics, Vol. 25 (2006), pp.956-962.

[7] Georgios Petkos. Learning multiple models of non-linear dynamics for control under varying contexts. Lecture Notes in Computer Science, Vol. 4131 (2006), pp.78-80.

DOI: 10.1007/11840817_93

[8] Rahmi Guelu. Fuzzy logic control of seat vibrations of a non-linear full vehicle model. Nonlinear Dynamies, Vol. 40 (2005), pp.70-82.

DOI: 10.1007/s11071-005-3815-7