P-V曲线与模态法联合应用分析电网静态电压稳定性  

Static Voltage Stability Analysis of Power System Using Combination of P-V Curve and Modal Analysis

作　　者：姜一涛 毛王清 杨明玉[2] 

机构地区：[1]国网技术学院,山东济南250002 [2]华北电力大学电力系统保护与动态安全监控教育部重点实验室,河北保定071003

出　　处：《陕西电力》2014年第12期48-50,68,共4页Shanxi Electric Power

摘　　要：针对传统电压稳定性方法应用于实际电网效果欠佳,提出了一种P-V曲线与模态分析联合应用的新方法。首先由P-V曲线计算功率储备系数Kp,衡量电网静态电压稳定裕度,找出功率储备相对薄弱区域,以此结果为基础,然后采用模态法分析、计算最小奇异值下各个节点的参与因子,找出电力系统中弱区域、关键支路和关键发电机,指导运行人员在发生大扰动时,注意薄弱区域,及时调整潮流、安排无功储备等。以某地区电网为例进行研究,验证了该方法的有效性和实用性。Due to the poor effect of traditional voltage stability method for actual power network,the paper proposes a new method,which combines P-V curve with modal analysis.First,KP （power reserve coefficient） is calculated to measure power system static voltage stability margin and find out the weak area of power reserve through P-V curve.Then,on the basis of that,the modal method is used to get a detailed analysis.The participation factors under the minimum singular value of each node are calculated to find out the weak area,key branch and key generators in power system.These results may guide operators to note the weak areas,timely adjust the power flow,and arrange reactive power compensation and so on after a major disturbance.Through the study of a large power grid,with the help of the PSD-Vsap,a static voltage stability program,the validity and practicability of the method is verified.

关 键 词：电压稳定 P-V曲线 模态分析 薄弱区域 

分 类 号：TM712[电气工程—电力系统及自动化]