Probabilistic steady-state and dynamic security assessment of power transmission system

作     者：LIU YanLi YU YiXin 

作者机构：Key Laboratory of Smart Grid of Ministry of EducationTianjin University 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2013年第56卷第5期

页      面：1198-1207页

核心收录：

学科分类：080802[工学-电力系统及其自动化] 0808[工学-电气工程] 08[工学] 

主　　题：power transmission system probabilistic security assessment time to insecurity security region uncertainties of windpower and load demand 

摘      要：Two-level system model based probabilistic steady-state and dynamic security assessment model is introduced in this *** of nodal power injection caused by wind power and load demand,steady-state and dynamic security constraints and transitions between system configurations in terms of failure rate and repair rate are considered in the *** to insecurity is used as security *** probability distribution of time to insecurity can be obtained by solving a linear vector differential *** coefficients of the differential equation are expressed in terms of configuration transition rates and security transition *** model is implemented in complex system successfully for the first time by using the following effective measures:firstly,calculating configuration transition rates effectively based on component state transition rate matrix and system configuration array;secondly,calculating the probability of random nodal power injection belonging to security region effectively according to practical parts of critical boundaries of security region represented by hyper-planes;thirdly,locating non-zero elements of coefficient matrix and then implementing sparse storage of coefficient matrix effectively;finally,calculating security region off-line for on-line *** of probabilistic security assessment can be used to conduct operators to analyze system security effectively and take preventive *** results on New England 10-generators and 39-buses power system verify the reasonableness and effectiveness of the method.