冰冻灾害下计入地形及冰厚影响的分时段电网可靠性分析  

Power system time-section reliability assessment analysis considering topography and icing under freezing disaster weather

作　　者：韩卫恒[1,2] 刘俊勇[1,2] 张建明[3] 贺星棋[1,2] 魏震波[1,2] 潘睿[1,2] 

机构地区：[1]四川大学电气信息学院,四川成都610065 [2]四川省智能电网重点实验室,四川成都610065 [3]四川省电力公司,四川成都610061

出　　处：《电力系统保护与控制》2010年第15期81-86,共6页Power System Protection and Control

基　　金：国家重点基础研究发展计划项目(973项目)(2004CB217905)~~

摘　　要：着重研究了冰冻天气下的电网可靠性。考虑到地形对冰力载荷的影响及覆冰引起导线等效半径增大对风力载荷的影响,建立了计及地形因素的分时段冰力载荷模型和考虑覆冰影响的分时段风力载荷模型,并形成冰冻灾害可靠性综合模型。针对同一线路同一时段可能处于不同级别冰冻气候的状况,采取对线路进行分段模拟再整合的方法,计算出关于时间函数的线路故障率,进而算出系统短时可靠性指标。以RBTS系统为例,设线路处于不同地形,不同级别冰冻天气下,计算得到各线路的短时故障率和系统的短时可靠性指标。The system reliability under freezing weather is studied.Considering the fact that topography has effect on ice load and the icing which causes the increase of conductor equivalent redius can affect wind load,a time-section ice load model and a time-section wind load model considering the impact of ice load and icing are established resepectively,which forms an integrated model of freezing disaster reliability.A method of sectional simulating and re-integrating is used to work out the line failure rate about time and then the short-term reliability index,on the condition that a transmission line may traverse several levels of freezing weather conditions.In RBTS,assuming the lines traverse different topography and levels of freezing weather conditions,this paper calculates each line＇s short-term failure rate and the short-term reliability index.

关 键 词：冰冻天气 冰力载荷 风力载荷 短时故障率 短时可靠性 

分 类 号：TM732[电气工程—电力系统及自动化]