确定电力系统临界出口点方法的研究  

Study on how to determine the critical exit point in power system

作　　者：岳颖[1] 林楠[2] 

机构地区：[1]东北电力大学,吉林吉林132012 [2]通辽电业局,内蒙古通辽028000

出　　处：《黑龙江电力》2012年第1期53-56,共4页Heilongjiang Electric Power

摘　　要：采用结构p步牛顿法与Normal Form变换相结合的方法确定电力系统临界出口点。将求解系统故障后的主导不稳定平衡点问题转化为非线性最小二乘问题,并采用结构p步牛顿法保证结果能快速准确收敛到主导不稳定平衡点。再用三阶Normal Form变换将非线性的电力系统映射到线性系统,进而确定临界切除时间。通过对实例仿真结果表明,该方法求得的结果与时域仿真法比较误差较小,能较好地反映临界切除时间。The combination of structured p step Newton algorithm and third-order Normal Form are adopted to determine the critical exit point in power system.In this paper,it firstly transforms the controlling unstable equilibrium point to nonlinear least squares after failures occurred in the solving system,adopts structured p step Newton algorithm to guarantee the accurate convergence of the controlling unstable equilibrium point;critical clearance time,and maps the nonlinear power system to linear system by third-order Normal Form in order to determine the critical clearance time.Simulation results show that this method,more accurate than time domain sinmlation method,can better reflects the critical clearance time.

关 键 词：结构p步牛顿法 三阶Normal Form变换 主导不稳定平衡点 临界切除时间 

分 类 号：TM712[电气工程—电力系统及自动化]