输电线路零序参数的实用计算方法及系统  

Practical calculation method and system of transmission line zero-sequence parameters

作　　者：王开白 姜雨萌 刘家庆[1] 晁璞璞 孙正伟[1] 鲍斌[1] 李卫星[2] WANG Kaibai;JIANG Yumeng;LIU Jiaqing;CHAO Pupu;SUN Zhengwei;BAO Bin;LI Weixing(Northeast Branch of State Grid Corporation of China,Shenyang 110000,China;School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]国家电网公司东北分部,辽宁沈阳110000 [2]哈尔滨工业大学电气工程及自动化学院,黑龙江哈尔滨150001

出　　处：《电力自动化设备》2021年第4期219-224,共6页Electric Power Automation Equipment

基　　金：国家电网公司东北分部科技项目(SGDB0000DKJS1900188)。

摘　　要：基于对输电线路参数计算方法的理论推导,分析影响输电线路参数工程计算精度的主要因素。针对输电线路沿线各段土壤电阻率变化较大且不易准确获取的问题,提出根据同一线路走廊内已投运线路实测参数反推沿线等效电阻率的方法;针对输电线路的局部同塔、局部平行及杆塔多样性特征,提出采用分段计算和杆塔参数简化处理方法;通过研究地线不同接地形式对零序参数的影响,结合实际调研分析,对理论计算公式进行了改进。基于MATLAB的AppDesigner,开发了输电线路参数辨识系统,结果表明,通过实用化改进,明显提升了输电线路参数计算的精度和工程实用性。Based on the theoretical derivation of the transmission line parameter calculation method,the main factors that affect the transmission line parameter engineering calculation accuracy are analyzed.For the problem that the soil resistivity along the transmission line is variable and difficult to obtain accurately,a method for inferring the equivalent resistivity along the line based on the measured parameters of the lines in operation is proposed.For the transmission line characteristics of line partially on the same tower,line partially parallel and tower diversity,the section calculation method and method for simplifying parameters of tower are proposed.By studying the influence of different grounding form of ground wire on zerosequence parameters,combined with actual investigation and analysis,the theoretical calculation formula is improved.Based on AppDesigner of MATLAB,a transmission line parameter identification system is developed.The results show that the accuracy of transmission line parameter calculation and engineering practicability are obviously improved through practical improvement.

关 键 词：输电线路 参数辨识 实用计算 软件开发 

分 类 号：TM773[电气工程—电力系统及自动化]