Direct-current integral charge measurement method for analyzing and judging distribution network cable water tree branch degradation stage

• Main Authors: WANG XIN, PAN YURU, WU WENXIU, YIN MING, SONG XULIN, WANG RUSHAN, ZHU JUNLIANG, ZHANG XINJUN, ZHAI LIWEI, GU WENQUAN
• Format: Patent
• Language: Chinese; English
• Published: 22.03.2022
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to a direct-current integral charge measurement method for analyzing and judging the water tree branch degradation stage of a distribution network cable, which comprises the following steps of: connecting a wire core of a measured cable conductor to a direct-current stabilized power supply, and connecting a cable copper shielding layer to a picoammeter for integral measurement of charges, so that the direct-current integral charge of the cable can be accurately measured; the device can be used for cables in different water treeing degradation stages, and an experimental foundation is laid for research on quantitative evaluation of the water treeing degradation state. 本发明涉及一种用于分析配网电缆水树枝劣化阶段判定的直流积分电荷测量方法，将所测电缆导体的线芯连接至直流稳压电源，将电缆铜屏蔽层连接至皮安表进行电荷的积分测量，能够较准确的完成对与电缆直流积分电荷的测量，可以用于不同水树枝劣化阶段的电缆，为定量评估水树枝劣化状态研究奠定了实验基础。