A reduced-order method for estimating the stability region of power systems with saturated controls

作者：Gan DeQiang; Xin HuanHai^*; Qiu Jiaju; Han ZhenXiang

来源：Science in China - Series E: Technological Sciences , 2007, 50(5): 585-605.

DOI：10.1007/s11431-007-0073-6

• saturation nonlinearity
• power system stabilizer
• linear matrix inequality
• singular perturbation method
• reduced-order method

In a modern power system, there is often large difference in the decay speeds of transients. This could lead to numerical problems such as heavy simulation burden and singularity when the traditional methods are used to estimate the stability region of such a dynamic system with saturation nonlinearities. To overcome these problems, a reduced-order method, based on the singular perturbation theory, is suggested to estimate the stability region of a singular system with saturation nonlinearities. In the reduced-order method, a low-order linear dynamic system with saturation nonlinearities is constructed to estimate the stability region of the primary high-order system so that the singularity is eliminated and the estimation process is simplified. In addition, the analytical foundation of the reduction method is proven and the method is validated using a test power system with 3 buses and 5 machines.

• 出版日期2007-10
• 单位浙江大学