基于线路修正传输极限和交流分布因子的ATC快速计算  

ATC calculation based on modified transfer limits and AC distribution factors

作　　者：孙荣富[1] 宋永华[2] 张昌华[3] 孙元章[1] 李国杰[1] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084 [2]Brunel大学电子与计算机工程系 [3]中国科学院自动化所,北京100080

出　　处：《电力自动化设备》2007年第8期1-5,10,共6页Electric Power Automation Equipment

摘　　要：根据现有在线应用线性分布因子法计算可用传输容量(ATC)的缺点,利用复数潮流考虑无功的影响,根据π型等值线路复数潮流轨迹和视在功率极限轨迹的交点得出计及无功的传输极限;根据基态雅可比矩阵,计算传输合同对节点电压的影响,再利用π型等值线路中线路潮流对两端节点电压的偏导,计算节点电压变化对线路潮流的影响;采用线路故障的节点功率注入模拟方法,得到考虑基态潮流的交流功率传输分布因子。并根据flowgate的剩余容量和分布因子计算ATC。定义flowgate为线路热极限和线路故障2种情况,分别计算基态潮流和考虑线路紧急故障情况下的区域间ATC值,并与线性分布因子法和重复潮流法(RPF)计算结果相比较。IEEE30节点系统计算结果表明,该算法快速准确,满足在线计算和分析要求。To improve the linear distribution factor method of ATC（Available Transfer Capability） calculation,the complex flow is used to consider the influence of reactive power and the corrected transfer limit including reactive power is calculated according to the intersection point of the complex flow trajectory of π- model transmission line and the apparent power limit trajectory. The impact of transfer contracts on node voltages is evaluated according to base- case Jacobian matrix and the partial derivatives of line flows by node voltages are computed ,the influences of node voltages on line flows are thus calculated. The AC power transfer distribution factors considering base- case power flows are achieved using the node power injection method for line outage simulation,according to which,as well as the remaining capacity of flowgate,ATC is calculated. The flowgate is defined for two conditions：line thermal limit and line outage,and the ATCs between areas are calculated respectively,which are compared with those repeated power flow method. The calculative posed method is fast and accurate,meeting the calculated using linear distribution factor method and results for IEEE 30- node system show that,the pro- requirements of online calculation and analysis.

关 键 词：可用传输容量 线性分布因子 重复潮流 复数潮流 交流功率传输分布因子 

分 类 号：TM711[电气工程—电力系统及自动化]