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电网技术  2011 

平行多回电缆序阻抗参数的计算与分析

, PP. 186-191

Keywords: 多回电缆,序阻抗参数,电磁耦合,金属护套,接地方式

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Abstract:

电缆序阻抗参数的准确计算是进行电缆工程设计的重要基础。平行多回电缆间由于电磁耦合的影响,其序阻抗参数的计算方法不同于单回路电缆。以“单导线–大地”回路为基础,提出了一种新的平行多回电缆序阻抗参数计算方法。该方法将金属护套与电缆芯线同等看待,分别与大地构成“护套–大地”回路和“芯线–大地”回路,充分考虑了护套电流以及各回电缆之间耦合作用的影响,同时实现回路间解耦,得到综合等值序阻抗参数,仿真算例验证了该方法的正确性。基于上述方法,以平行2回电缆为例,对不同敷设方式下序阻抗参数的变化特点进行比较分析。

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