10kV电网过电压监测装置设计及实测与仿真对比分析
发布时间：2018-11-17 14:09
【摘要】：为了解雷电过电压从输电线到变电站的传播过程以及过电压的波形特征和影响因素,采用基于两级阻容分压的10 kV电网过电压在线监测装置,采集到变电站10 kV母线上雷电过电压,并对反击雷电过电压波形进行了分析。实测反击雷电过电压波形包含振荡,并且幅值≤50 kV。利用PSCAD/EMTDC建立传输线和变电站的电磁暂态模型,仿真分析了母线上并联馈线、容性设备,以及避雷器动作对过电压波形的影响。仿真结果表明反击雷电过电压波形中的短暂上升沿是由绝缘子闪络引起。母线上并联容性设备使过电压振荡加强,并联馈线使过电压波形产生周期性振荡,并且馈线数量越多,振荡周期越短。受避雷器动作的影响,母线上反击雷电过电压迅速衰减,过电压波形包含不规则周期性振荡,并且过电压幅值被限制到50 kV。
[Abstract]:In order to understand the propagation process of lightning overvoltage from transmission line to substation as well as the waveform characteristics and influencing factors of over-voltage, a 10 kV on-line monitoring device for over-voltage of power network based on two-stage resistance-capacitance voltage is adopted. Lightning overvoltage on 10 kV busbar of substation is collected and the waveform of counter lightning overvoltage is analyzed. The measured lightning overvoltage waveform contains oscillations, and the amplitude is 鈮，
本文编号：2338071
[Abstract]:In order to understand the propagation process of lightning overvoltage from transmission line to substation as well as the waveform characteristics and influencing factors of over-voltage, a 10 kV on-line monitoring device for over-voltage of power network based on two-stage resistance-capacitance voltage is adopted. Lightning overvoltage on 10 kV busbar of substation is collected and the waveform of counter lightning overvoltage is analyzed. The measured lightning overvoltage waveform contains oscillations, and the amplitude is 鈮，
本文编号：2338071
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