小电流选线接地装置和非线性高电阻柜在10 kV供电系统中的应用

Application of low-current line selection grounding device and non-linear high-resistance cabinet in 10 kV power supply system

总结了小电流选线接地装置和非线性高电阻柜在化工企业电气中的应用经验。供电系统中存在母线和设备单相接地现象,给供电系统稳定性带来危害,给氯碱企业平稳生产带来一定的风险。陕西北元化工集团股份有限公司利用小电流选线接地装置和电阻柜判断故障点,并准确有效地进行隔离,保证了供电系统的平稳运行。供电系统中加人非线性高电阻柜后,提高了小电流选线功能整定精度,可以准确、迅速地选择故障点。

The application experience of low-current grounding device and non-linear high-resistance cabinet in chlor-alkali enterprises was summarized. The single-phase grounding of bus and equipment brings harm to the stability of power supply system and risks to the smooth production of chlor-alkali enterprises. Shaanxi Beiyuan Chemical Industry Group Co., Ltd. uses the low-current grounding device and the resistance cabinet to judge and accurately and effectively isolates the fault point to ensure the smooth operation of the power supply system. The non-linear high-resistance cabinet is added to the power supply system, thus the setting accuracy of the low-current line selection function is improved, and the fault point can be selected accurately and quickly.