Power Flow Tracing with Consideration of the Electrical Distance

The power flow tracing method is found that it may produce unreasonable loss allocation due to not reflecting the electrical distances between buses directly. This paper presents a new tracing method to consider the electrical distances through network partitioning. The method first takes the equivalent impedance of the pair of terminals to evaluate the electrical distance between buses. Then it uses a hierarchical clustering method to cluster the buses close in electrical distance together which partitions the network into several sub-networks. Finally the power flows are traced from two levels, the exterior and interior of sub-networks. The method keeps the property of nonnegative loss allocation of power flow tracing method, and reflects the electrical distances among buses better. Test results for Northeast China power system validate the effectiveness of the proposed method.