A Method for Calculating Power Supply Capacity of a High Voltage Distribution Network based on Power Supply Area Division

Starting from the application purpose of distribution network planning and the idea of solving a large-scale and complex problem through using a simple method, a practical method is proposed for calculating the power supply capacity of a high voltage distribution network based on power supply area division. Based on relatively independent power supply subareas, the power supply capacity of a high voltage distribution network is obtained by the direct accumulation of its subareas’ power supply capacities. As part of that work, an approximate estimation formula is deduced, which can convert the allowable line voltage loss into a corresponding capacity constraint, so that the influence of voltage quality on power supply capacity can be concisely considered. Also, the approximate formulas are deduced for estimating the power supply capacities of typical high-voltage wiring modes, which are convenient for manual calculation or intervention. The example shows that the presented model and method are intuitive, simple, stable and effective, and are convenient for popularization and application in practice.