A method for analyzing the impact of parameter uncertainties on transient stability

作者：Xin Huan Hai^*; Gan De Qiang; Qiu Jia Ju; Ni Yi Xin

来源：Proceedings of the CSEE, 2006, 26(20): 15-21.

• Dynamic power system
• Lyapunov function
• Parameter uncertainty
• Transient stability
• Uniformly ultimately bounded (UUB)

Dynamic power system is a nonlinear multivariable system. It is rather difficult to set up a precise model due to the parameter uncertainties. Based on the UUB (uniformly ultimately bounded) theory and a quadratic Lyapunov function, this paper provides a methodology to analyze the influence of parameter uncertainties on transient stability under the classical model with uniform damping coefficients. We suggest a method to judge whether the stability characteristics will be changed or not by comparing the limit index and the calculated index in some operating point. In addition, two numerical examples are described, indicating the reliability and simplicity of this approach in spite of its conservative side.

• 出版日期2006
• 单位浙江大学