HEMP场激励下交直流高压输电线耦合响应概率分布

Probability Distribution of Coupling Responses of HVAC and HVDC Externally Excited by HEMP

应用蒙特卡罗法和传输线耦合响应节点导纳方程,分析了高空核电磁脉冲(HEMP)场激励下交流高压输电线和直流高压输电线耦合响应的分布规律。分析中将电磁波的入射参数,包括极化角、入射角和方位角,作为一组随机变量,并由计算机随机产生。应用瞬态外场激励下多导体传输线节点导纳方程分别分析端接传输线耦合电流和耦合电压响应峰值,并得出响应的概率分布曲线。当传输线入射参数在[0,π/2]范围内变化时,对比Bell实验室与IEC610000两种标准HEMP电磁波激励下响应的概率分布规律发现:对于包含屏蔽线共地五导体交流架空线来说,不管是IEC61000-2-9标准还是Bell标准,在相同累积概率情况下,中间相首端的耦合响应峰值总是小于两边相的耦合响应峰值。

Based on the nodal admittance method,Mento Carlo method for the characterization of wiring-harness susceptibility to HEMP is applied.The problems of field-coupling onto HVAC and HVDC transmission line loaded by terminal resistances are considered.The external field is modeled by a plane wave with random parameters.Investigated configuration is wave with three random parameters of polarization angle,incident angle and azimuth angle,and the set of random values is generated by computer.When the range of incident parameters of wave is of ,the probability distributions of terminal currents and voltages are investigated.It is showed that,no matter what standards is considered the results of responses probability of middle phase at sending ends of HVAC is smaller than that of lateral phases.