输电线路摩尔根载流量简化公式的初步研究  

Preliminary Study on Morgan Transmission Capacity Simplified Formula of Transmission Lines

作　　者：韩晓燕[1] 黄新波[2] 赵小惠[1] 周国华[3] 和俊腾[4] 

机构地区：[1]西安工程大学机电工程学院,西安710048 [2]西安工程大学电子信息学院,西安710048 [3]山西省电力公司,太原030001 [4]西安金源电气有限公司,西安710075

出　　处：《电力系统及其自动化学报》2009年第5期92-96,共5页Proceedings of the CSU-EPSA

摘　　要：传统载流量公式中交直流电阻比计算过程复杂,故利用交直流电阻比与电流的非线性关系简化载流量计算公式。以LGJ400/25导线为例,在环境温度20℃、30℃和40℃下简化前后公式计算误差均不超过1.4%,简化公式满足精度要求。利用动态增容和SCADA系统进行现场运行验证,结果表明:简化公式计算的载流量值与SCADA值相比,15天中有12天相对误差小(不超过10%),3天的相对误差稍大(不超过18%,较大误差主要由系统采集数据为暂态数据引起),对处于热平衡条件下的输电线路该数学模型可行有效。According to the complex calculation process of the rate of AC-DC resistance in transmission capacity calculation formula of transmission lines, the non-linear relationship between the rate of AC-DC resistance and current was used to simplify calculation formula. Taking line LGJ400/25 as an example, the calculation results before and after using the simplified formula showed that the relative errors between the two are all less than 1.4% under the ambient temperature of 20℃, 30℃ and 40℃,which means that the simplified formula meets the demand of precision. Finally, the simplified formula was verified by using dynamic capacity-increase and SCADA system, the results show that during 15 days, there are 12 days that relative error between the calculated transmission value by using simplified formula and the actual transmission value coming from SCADA is small（within 10%）, and 3 clays that the error is bigger（the relative error is also less than 18% ,and the error is mainly caused by temporary data from system）, so the mathematical model is feasible and effective under the conditions of heat balance for transmission lines.

关 键 词：增容技术 输电线路 载流量 交直流电阻比 

分 类 号：TM726.3[电气工程—电力系统及自动化]