Hotspot Location and Mitigation for Underground Power Cables
Guo Jianzhao1, Shen Xielin1, Fan Xinquan2, Tian Yanshan3, 4
1. Quanzhou Electric Power Bureau, Quanzhou, Fujian 360000; 2. Fujian Razens Electric Power Since and Technology Co., Ltd, Fuzhou 350003; 3. Shandong Electric Power Economic Research Institute, Ji’nan 250001; 4. School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049
Abstract：Hotspots always limit the cable current-carrying capacity. By using the distributed temperature sensing (DTS), it could locate the hotspots of a 230kV 500MVA underground cable circuit. With a new technique, the derating at each hotspot was calculated, which helped to determine more accurately the thermal environment parameters at the hotspot. Case studies are also presented to show the useful restoration of full cable rating after the hotspots were mitigated.
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2013, Vol. 14 
