Calculation of the Probability Density Function of Critical Clearing Time in Transient Stability Analysis

In this paper, the critical clearing time, tcc in power system transient stability analysis is modeled as a random variable due to the randomness nature of power system load. A linear approximation approach that mainly involves the sensitivity calculation of the derivative of tcc to system load is developed to obtain the probability density function (pdf) of tcc based on the pdf of system load. This approach is verified to be accurate under the condition of small load deviation by Monte Carlo simulation method. The probability of system being transiently stable for particular disturbances are calculated based on the pdf of tcc.

• Type: Conference
• Year: 2002
• Where: HICSS
• Authors: Yiqiao Liang, Saffet Ayasun, Chika Nwankpa
• Keywords: Biometrics, HICSS 2002, Linear Approximation Approach, Small Load Deviation, Transient Stability Analysis