求取电力系统PV曲线的改进连续潮流算法  

Improved Continuation Power Flow in Tracing PV Curves of Power Systems

作　　者：王红燕[1] 蔡亮 祁中建 

机构地区：[1]山西电力职业技术学院,太原030001 [2]山西省临汾供电分公司,山西临汾041000 [3]江苏省电力公司检修分公司政平换流站,江苏常州213173

出　　处：《电气技术》2011年第7期28-31,共4页Electrical Engineering

摘　　要：连续潮流算法是电压稳定分析的有力工具,能够克服接近稳定极限运行状态时的潮流不收敛的问题。常规的连续潮流算法基于切线预测与牛顿——拉夫逊法校正,求取电力系统PV曲线时所需时间较长。鉴于此,本文提出了一种改进连续潮流算法,它将常规潮流和连续潮流结合起来,可以取得快速和准确的良好效果。从基本工况开始增加负荷,用割线法预测潮流解并通过快速解耦法校正,直至不能获得潮流解。从这点之后,用经典连续潮流法求解潮流。通过对IEEE118节点系统中的仿真计算,验证了改进算法的快速性、准确性、实用性。Continuation power flow method,the strong tool of voltage stability analysis,can overcome the problem of singularity of Jacobin matrix when running close to collapse point.Conventional continuation power flow based on corrector process of New—Raphson method needs a longer period of time when calculating the PV curve of power system.In view of this,this paper proposes an improved continuation power flow,which combines conventional power flow and continuation power flow.Secant line prediction and fast decoupled power flow are used to solve power flow by increasing load from the basic condition to that of not solving power flow.From this point,It using continuation power flow.Based on the simulation and calculation in IEEE118 buses system,the improved method has characteristics of fast computation speed,accuracy and practicability.

关 键 词：PV曲线 快速解耦法 连续潮流法 

分 类 号：TM744[电气工程—电力系统及自动化]