军用电站雷电过电压电磁暂态仿真研究

针对军用电站雷电过电压电磁暂态模型复杂度高和计算误差大的问题,以典型军用电站为研究对象,提出了军用电站电力电子设备离散-连续分离建模方法,建立了电缆、控制箱等雷电防护关键部件的电磁暂态模型,并采用插值算法对开关的暂态等值电路模型进行修正,提高了开关动作时刻仿真模型的准确性。基于PSCAD/EMTDC软件构建了军用电站雷电过电压电磁暂态仿真系统,通过大量的仿真试验,获取了接地电阻、浪涌保护器等对军用电站耐雷水平的影响规律,基于此开发的模块化军用电站雷电过电压防护装置可阻塞沿不同电能制式、电压强度的电源/数据/信号线引入的雷电过电压,进一步验证了仿真模型的正确性。

Research on Electromagnetic Transient Simulation on Lighting Over-voltage of Military Power Supply

According to complex and big miscalculation of electromagnetic transient modeling on military power supply,the dispersed-continuous separation modeling method of electronic power device was suggested.The electromagnetic transient model of military power supply key part in lighting protection such as cables and control unit based on PSCAD/EMTDC power simulation software was established.To achieve the accurate transient simulation result,the interpolation algorithm was adopted to amend the result because those models could not describe dynamic action between switch cycles.The influence laws of grounding resistance and SPD to military power supply lightning withstand levels were discussed.Finally,the lighting protection module device could shield and filter lighting overvoltage from power supply/data/signal line,by which the electromagnetic transient modeling on military power supply was further verified.