Research on the Calculation Method of Power Supply Capability of the Urban Distribution Network

The calculation of power supply capability is of great value to the refined evaluation and optimal planning of the distribution network.Considering the network load transfer flow and equipment capacity constraints, the paper studies the effects of factors such as substation configuration,distribution network structure and operation status on the power supply capability,and then proposes a new method to calculate the power supply capability through contact relation matrix.Power supply capability of the distribution system is attributed to the power supply capacity within the substation and the network load transfer capability.The example analysis shows that the calculation results accord more with the actual power grid operation;seize the root of power supply capability;and objectively reflect the power supply bottlenecks and contact vulnerable points in the distribution network.The method can provide effective guidance for distribution network structure optimization to fully tap the supply capability of a power grid.