摘要
避雷线分流系数是接地网设计、避雷线选型和热效应分析以及评价输电线路电磁环境的基础,因此合理的避雷线分流系数计算方法有着重要的意义。基于避雷线的等效阻抗模型,提出了计算站外短路情况下避雷线分流系数的分流阻抗模型计算方法,并利用MATLAB程序实现了计算过程。针对某发电厂站外短路的情况,分别利用ATPDraw软件和分流阻抗模型计算了避雷线分流系数,两者计算结果的相对误差小于10%,满足工程计算要求,验证了本文站外短路分流阻抗模型的正确性。最后,本文利用分流阻抗模型分析了电站接地电阻、杆塔接地电阻和避雷线型号对避雷线分流系数的影响,为工程设计提供参考。
The shunt coefficient of lightning shield lines is the foundation of grounding design, lightning shield lines selection and analysis of thermal effect, assessment on electromagnetic environment of transmission ｜ine, therefore, reasonable calculation method of the shunt coefficient of lightning shield lines is of great significance. In this paper, based on the equivalent impedance model of lightning shield lines, shunt impedance model for calculating the shunt coefficient of lightning shield lines during short circuit outside the substation during short circuit outside the substation is presented, and the calculation process is realized by using MATLAB program. Be aimed at the case that grounding fault occurring outside of a power plant, the shunt coefficient of lightning shield lines is calculated by using ATP draw and shunt impedance model, the relative error of the two results is less than 10%, which meet engineering requirements and proved the correctness of shunt impedance model. At the last, the influence of grounding resistance of substation the shunt coefficient of lightning shield lines is provide reference for engineering design. and tower and the type of shunt impedance model on analyzed by using shunt impedance model, which
出处
《电瓷避雷器》
CAS
北大核心
2016年第4期142-147,共6页
Insulators and Surge Arresters
关键词
站外短路
避雷线分流系数
分流阻抗模型
MATLAB
short circuit outside the substation
shunt coefficient of lightning shield lines
shuntimpedance model
MATLAB
