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首页> 外文期刊>Generation, Transmission & Distribution, IET >Algorithm for load cycling correction to minimise the dry zone influences on the cross-linked polyethylene (XLPE) cable insulation
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Algorithm for load cycling correction to minimise the dry zone influences on the cross-linked polyethylene (XLPE) cable insulation

机译：负载循环校正算法，以使干燥区对交联聚乙烯（XLPE）电缆绝缘的影响

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摘要

Dry zone formation around underground power cables during load cycling may lead to thermal failure of the cable's insulation. This phenomenon has to be recorded to send an alarm to the maintenance crew when the soil around the cable reaches the critical value at which the dry zone has started to be formed. In this study, the buried cable thermal model is modified to include occurrences of dry band formation during dynamic loading. An algorithm has been proposed for corrections of the cable load cycle to maintain the insulation maximum temperature at 85 degrees C and not exceed this limit. This is suggested for reducing the dry zone formation effect on the cable insulation lifetime. The study is done on different single-core cables using different soil samples that can be used as backfill materials. The variations in thermal soil resistivity and soil thermal capacitance with temperature and moisture content of backfill soil are considered. The practical system used for monitoring the dry zone formation around the cable has been proposed.
机译：负载循环期间的地下电源电缆周围的干燥区可能导致电缆绝缘的热失效。当电缆周围的土壤达到干燥区开​​始形成的临界值时，必须记录这种现象以向维护人员发送警报。在该研究中，修改了掩埋电缆热模型，包括在动态载荷期间发生干频形成的发生。已经提出了一种算法，用于校正电缆载荷周期，以保持85摄氏度的绝缘最高温度，而不是超过该极限。建议减少对电缆绝缘寿命的干燥区形成效应。使用可用作回填材料的不同土壤样品在不同的单芯电缆上进行该研究。考虑了热土壤电阻率和土壤热电容的变化，与回填土的温度和水分含量。已经提出了用于监测电缆周围的干燥区的实际系统。

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