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电网技术  2011 

电力系统中微控制器电磁抗扰度的建模与仿真

, PP. 138-141

Keywords: 继电保护,微控制器,电磁抗扰度,直接功率注入,电源分配网络

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Abstract:

为实现电力系统继电保护装置中集成电路的电磁兼容性标准化建模,提出一种16-bit微控制器在射频干扰下直接功率注入测试方法的传导抗扰度改进模型。与已有模型相比,改进模型的I/O端口模块增加了反映微控制器内部阻抗随外部干扰频率变化的动态、非线性因素;改进模型的无源分配网络(powerdistributionnetwork,PDN)模块增加了内核网络、锁相环和A/D网络模型,使PDN模块能更精确地反映微控制器内部电能分配情况。通过测量与仿真结果对比,表明改进模型有效性可达1.4GHz,仿真不确定度为±1.8dB(可接受范围为±2dB),与目前国际上该微控制器最先进的同类模型相比,该模型适用频率更广,仿真不确定度范围更小。

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