The maximum power supply capability calculation based on the actual load characteristics

Considering operation constraints and the actual load characteristic, the maximum power supply capability and power supply margin of distribution network is real-time calculated, which evaluates more realistically the safety level of distribution network under the current operation mode. It is helpful for the distribution network to supply users safely and reliably with electricity of high quality, which is of great significance for analysis of the safe operation of the distribution network. In this paper, based on the actual load characteristics different kinds of load growth models are established by the least square method. The model for calculating the maximum power supply capability is proposed based on the load growth models. The power supply capability of distribution network under the current operation mode is calculated by the repetitive power flow algorithm, by which we can obtain an accurate and real-time power supply capability of distribution network, and to better evaluate the safety level of distribution network. That will provide scientific basis for prevention, control and recovery of distribution network. The simulation analysis shows that the model is simple and clear. That model can apply to any actual voltage level distribution network, and consider more operation constraints, and has a practical value.