基于沿线电流故障分量差值的交叉互联电缆故障测距

作者：Yang Mingjia; Xia Chengjun^*; Chi Zibin; Lai Shengjie; Chen Xiaoru; Huang Longyi

来源：Power System Protection and Control, 2023, 51(19): 54-66.

DOI：10.19783/j.cnki.pspc.221913

• cross connecting
• double π model
• fault component
• fault distance
• high voltage cable

In order to solve the complicated fault location problem for long distance high voltage cables using cross interconnection grounding method, a fault location method for cross interconnection cables based on the fault components difference distribution along the current is proposed. First, the cable fault section is determined by the sheath circulation before and after the fault occurs. Second, considering the coupling relationship between the core and the sheath, the voltage and current equations along the cable when faults occur in different sections are derived based on the double π model. On this basis, the fault distance is obtained by solving the fault component difference function zero, and the fault distance is modified by the tangent equation. Finally, a cable fault model is built to verify the ranging method. The results show that the proposed method location error is about 1%, which has a high accuracy, and has a certain reference significance for the fault location of cables using the cross-connected grounding mode. ? 2023 Power System Protection and Control Press.

• 单位
  华南理工大学