Optimal Excitation Control System of Synchronous Generator in Big Disturbance Based on Improved LOEC Mode

Abstract:

Linear optimal excitation control (LOEC) mode takes the power system as multiple control target, it has better dynamic performance and adaptability in the vicinity of the equilibrium point. But when the disturbance is too large, the system performance will be deteriorated, meantime controlling lack the terminal voltage control. This paper presents the optimal excitation controller which has a wide excitation control system adapting to a wide range disturbance. The choice of variables is changed based on the variables used in the excitation control of exact linearization. The speed deviation differential is used to replace the electromagnetic power deviation in commonly optimal excitation control system, and the terminal voltage control is added. The improved excitation control system adaptability is enhanced. The simulation results show that the improved excitation controller has a wider adjustment range, anti-disturbance and strong characteristics.

• Periodical: Advanced Materials Research (Volume 748)
• Pages: 793-796
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.748.793
• Online since: August 2013
• Authors: Zi Сheng Li, Bao Shan Yuan
• Keywords: Excitation Control, Large Disturbance, LOEC, Multivariable Control, Optimal Control, Robustness, Transient Stability

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