摘要
在电力系统静态电压稳定性分析中,临界电压和极限功率反映了当前系统的负荷增长情况和电压水平,提出了一种新的参数化连续潮流法绘制P-U曲线,从而追踪出系统的临界电压和极限功率。该方法采用非线性预测,几何相似原理的参数化,解决了常规潮流方程在极限功率处雅可比矩阵奇异的问题。此方法简单、易懂,并具有较好的收敛性,采用自动变步长提高了程序的效率。该方法应用于IEEE39节点和IEEE118节点测试系统,成功追踪出了系统的临界电压和极限功率,从而表明了该方法的正确性和有效性。
The critical voltage and limit power reflect the growth of the load in the current system and current voltage level for the power system voltage stability analysis.A new continuation power flow method with parameterization technique is proposed to draw P-Ucurve,and to track the critical voltage and limit power of the system.By nonlinear predictor and parameterization based on geometric similarity theory,the singularity of Jacobi matrix at limit power for conventional power flow equations is overcome.This method is simple,easy to understand,and has good convergence. The efficiency of the program is improved by the method of automatic change-step.The critical voltage and limit power of the system are tracked successfully by the proposed method with the examples of IEEE39-bus and IEEE118-bus test systems,which show the correctness and validity.
出处
《现代电力》
2011年第5期10-14,共5页
Modern Electric Power
关键词
连续潮流
P-U曲线
非线性预测
参数化
临界电压
潮流计算
continuation power flow
P-Ucurve
nonlinear predictor
parameterization
critical voltage
power flow calculation
