基于电压凹陷矩阵的不对称电压凹陷评估方法  

Method for Assessment of Unbalanced Voltage Sage Based on Voltage Sag Matrix

作　　者：曾智[1] 杨洪耕[1] 

机构地区：[1]四川大学电气信息学院,四川成都610065

出　　处：《现代电力》2008年第5期9-13,共5页Modern Electric Power

基　　金：国家自然科学基金资助项目(50677041)

摘　　要：提出了基于故障相与非故障相电压凹陷矩阵解决单相对地短路故障电压凹陷域的确定方法。利用网络正序、负序、零序阻抗矩阵,建立故障相与非故障相电压凹陷矩阵,从而得到网络任一节点凹陷域的准确描述。确定了非故障相发生电压凹陷的条件,并针对不对称短路故障的特点,考虑了变压器不同绕组方式对电压凹陷传递的影响。由凹陷矩阵提供的信息还能比较网络不同节点发生短路时对其余节点产生的凹陷幅值。最后以IEEE14节点系统作为算例进行仿真分析,仿真结果证明了所提算法的有效性。A new analytical method is proposed for drawing the exposed area and assessment of single phase false in HV networks. This method is based on the false and no-false phase voltage sag matrix. From the impedance matrix of positive, negative and zero sequence, the false and no-false phase voltage sag matrix can be easily built. The exposed area can be accurately and easily drawn based on the false and no-false phase voltage sag matrix. The condition of the voltage sag of the no-false phase is confirmed in the similar way. The effect of the transformers＇ different winds for voltage sag transporting is considered. Based on the information of the false and no-false phase voltage sag matrix, the voltage sags of the bus caused by the false of other different buses can be compared. The developed method is applied to IEEE 14-bus system, and the simulation result proves its effectiveness.

关 键 词：敏感负荷 凹陷域 电压凹陷 故障相与非故障相电压凹陷矩阵 

分 类 号：TM863[电气工程—高电压与绝缘技术]