基于PSCAD的LNG接收站二次系统耐雷水平仿真分析方法

Simulation Analysis Method for Lightning Withstand Level of Secondary System of LNG Terminal Based on PSCAD

为全面评估LNG接收站二次系统耐雷水平,提出了一种基于PSCAD/EMTDC的电气二次系统耐雷水平仿真分析方法。根据LNG接收站防雷措施实际设置情况,构建接收站防雷保护的PSCAD仿真模型,仿真计算雷电波侵入二次系统时雷电过电压的变化情况。分析安装避雷器、3级防雷保护措施时的防雷效果。结果显示,避雷器与3级防雷保护措施配合时能够有效抑制接收站二次系统雷击过电压,仿真分析方法可为提升LNG接收站二次系统耐雷水平提供一定理论参考。

In order to comprehensively evaluate the lightning withstand level of secondary system in LNG terminal,a simulation analysis method of lightning withstand level of electrical secondary system based on PSCAD/EMTDC is proposed in this paper.According to the actual setting of lightning protection measures of LNG terminal,the PSCAD simulation model of lightning protection of LNG terminal is constructed,and the change of lightning overvoltage when lightning wave invades the secondary system is simulated and calculated.The lightning protection effect of installing lightning arrester and 3-level lightning protection measures is analyzed.The results show that the lightning surge arrester can effectively suppress the lightning overvoltage of the secondary system of the LNG terminal when combined with the three-level lightning protection measures.The simulation analysis method can provide a theoretical reference for improving the lightning withstand level of the secondary system of the LNG terminal.