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基于晶闸管钼层实测温度计算结温的方法

, PP. 195-201

Keywords: 晶闸管,共轭梯度法,返溯结温,高压直流

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Abstract:

为获得较准确的晶闸管结温,提出了基于晶闸管钼层实测温度计算结温的共扼梯度算法。分析了共轭梯度法用于求解结温的具体步骤,并通过FORTRAN语言编译形成LOG命令流,导入ANSYS软件中来实现算法,该方法对于未知的低频分量,以较少的迭代次数即可以得到准确解,对于未知的高频分量,通过多次的迭代也能够获得准确的返溯值,因而具备处理多个未知量且收敛速度快的优点。以KPD3000-72型晶闸管应用于直流输电领域为例,分别在直流稳态、单波次浪涌电流和3波次浪涌电流的试验条件下进行计算,结果表明所得结温准确,为传统热阻抗法提供了校核的依据。

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