基于电磁暂态仿真软件雷电过电压仿真误差研究

Study on ATP-EMTP Lightning Overvoltage Simulation Error

电磁暂态仿真软件(ATP-EMTP)是电力系统用于雷电暂态过电压仿真的主要软件,主要运用于电力系统的初步防雷保护设计以及对现有防雷措施进行改造研究。仿真结果的精确性直接关系到整个防雷保护设计以及改造的成效,因此对仿真软件的精确性研究至关重要。主要采用目前雷击输电线路仿真电路模型,对雷电流模型输出以及雷击点电流进行检测,同时对比计算出雷电流模型设置参数为3kA以及雷击点作用电流3kA两种情况下四点过电压的误差率。仿真实验结果得出了雷电流电源模型与实际作用电流的误差率,同时得到该雷电流误差率导致的各点过电压误差率。通过对仿真软件误差研究,不仅为提高雷电过电压仿真精确性提供了相应的参考意义,同时保证了电力系统的耐雷水平,降低了雷击跳闸率,提高电力系统的供电可靠性。

ATP-EMTP is the main software used for power system lightning transient overvoltage simulation,primarily for power system preliminary lightning protection design,and existing lightning protection measures modification study.The accuracy of the simulation result is directly related to the lightning protection design and transformation efficiency,so the research on the accuracy of the simulation software is crucial.This paper mainly adopts the lightning transmission line simulation circuit model to test the lightning current model output and lightning strike point current,and at the same time comparatively calculate the four-point over-voltage error rate on the condition that the lightning current model parameter is set up as 3kA and the lightning strike point function current 3kA.The simulation results define the error rate between the lightning current power model and the actual current,as well as the consequent overvoltage error rate of each point.This research on simulation software error not only provides the corresponding reference for improving the lightning overvoltage simulation accuracy,and also guarantees the lightning resisting capacity of the power system,reduces the lightning trip-out rate,and improves power supply reliability of power system.