为研究应急负荷变动下高压单芯电缆的线芯温度响应特性,建立了应急负荷变动下高压单芯电缆线芯温度随时间变化的梯度函数,以110 kV交联聚乙烯单芯电缆为研究对象,设计了水中敷设、空气中敷设、土壤中直埋的3种条件下高压单芯电缆应急负荷变动的温升试验.结果表明:当高压电缆负荷发生应急变动时,线芯温度随时间的梯度变化受环境影响很大,其中空气敷设电缆线芯温度的变化梯度最大,水中敷设电缆线芯温度变化梯度最小,土壤敷设电缆线芯温度变化梯度介于前两者之间.在3种敷设条件下,电缆线芯温度的梯度变化都随应急变动负荷的增加而增大.
To study the response characteristic of HV single-core cable conductor temperature under emer-gency load, a gradient function of conductor temperature to time under emergency load was built. The temperature rise test of 110 kV XLPE single-core cable under emergency load change was carried out in terms of three conditions, which is laid under the water, in the air and in the soil respectively. The re-sults show that the conductor temperature gradient is seriously affected by the laying environment under emergency load. The conductor temperature gradient of the cable laid in the air is the biggest, while that laid under the water is the smallest, and that laid in the soil lies between. The conductor temperature gra-dient increases with the increase of emergency load in all three conditions.
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