补偿电势法用于在线检测 XLPE 电缆

The Application of Compensating Potential Method in XLPE On line Detection

电缆屏蔽接地化学电势Ｅｓ较大和护套绝缘电阻Ｒｓ较小时会对交联聚乙烯（ＸＬＰＥ）电力电缆绝缘的多种在线检测方法的检测数据造成影响，故应及时监测其具体数值。通过电路分析和模拟实验，开发了一种简捷、可靠的Ｅｓ、Ｒｓ在线检测方法，测量Ｒｓ具有抗干扰能力强，测试数据准确的特点；当Ｒｓ小于１ＭΩ时，该方法对Ｅｓ的测量也具有足够的精度。

The screen chemicalpotential ( E s) and the sheath insulating resistence ( R s) can effect the detected data in most on line detecting method for XLPE cable, especialy, to the “DC method”. The key to eliminates or reduces the disturbance is firstly to monitor the data of E s and R s in time. In this paper, by analyzing circuit and simulating test, the author has developed a simple and reliable on line test method for examining the data of E s and R s of XLPE Cable.