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| Received:April 28, 2007Revised:October 20, 2007 |
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| Nonlinear variable structure excitation and steam valving controllers for power system stability |
| Ben WANG, Zongyuan MAO |
| (School of Electricity Engineering, Southwest Jiaotong University, Chengdu Sichuan 610013, China; College of Automation Science and Engineering, South China University of Technology, Guangzhou Guangdong 510641, China) |
| Abstract: |
| A set of novel nonlinear variable structure excitation and steam-valving controllers are proposed in this paper. On the basis of the classical dynamic equations of a generator, excitation control and steam valving control are simultaneously considered. Design of these controllers combines the differential geometry theory with the variable structure controlling theory. The mathematical model in the form of “an affine nonlinear system” is set up for the control design of a large-scale power plant. The dynamic performance of the nonlinear variable structure controllers proposed for a single machine connected to an infinite bus power system is simulated. Simulation results show that the nonlinear variable structure excitation and steam-valving controllers give satisfactory dynamic performance and good robustness. |
| Key words: Excitation control Nonlinear control Steam valving control Variable structure control |
