As the core line of distribution network load transmission, 10 kV medium voltage power line can reduce line loss to a great extent. However, the current situation of the power grid is that the basic information of 10 kV line is disordered and the relationship between line changes is fuzzy, which leads to unbalanced load and high line loss rate. At present, the solution is the traditional way such as manual line inspection and power drawing discrimination, which has poor timeliness, low accuracy and the risk of potential personnel injury. In this paper, we discuss a middle carrier communication device based on the load change intelligence told system, using the only physical line 10 kv medium voltage line sequence signal transmission characteristics, real-time accurate criterion line change relations, and the load change intellisense, make 10 kv medium voltage power line is in the optimal load distribution, reduce the line loss, greatly reduce the wastage of the electricity energy.
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