Load flow calculation method based on active power distribution network

Abstract

The invention provides a load flow calculation method based on an active power distribution network. The method comprises the steps of: obtaining topological information including nodes, loops and branches based on a network topological structure of the active power distribution network, and collecting power data corresponding to the topological information; establishing a loop-branch matrix based on a feature vector group; and calculating voltage distribution according to the established loop-branch matrix and an obtained power value, and according to obtained power distribution and the voltage distribution, calculating a load flow calculation result. According to the method, an existing nonlinear load flow calculation equation is simplified into a linear algebraic equation, the load flow calculation difficulty is reduced, the iteration process is reduced, the operation time is shortened, and a calculation result can be quickly obtained when the load flow of a power distribution network which contains a plurality of distributed power supplies and is large in scale is calculated.

Description

technical field [0001] The present application relates to the field of power flow calculation of active distribution networks, in particular to a power flow calculation method based on active distribution networks. Background technique [0002] With the depletion of natural resources and the aggravation of environmental problems, the development and utilization of renewable energy has become the theme of the times, and the demand for distributed power to be connected to the distribution network is also increasing day by day. After the distributed power generation is connected to the distribution network, it will change the passive network characteristics of the traditional distribution network and make it an active network, which will have an important impact on the power flow trend, voltage distribution, dispatching operation and other aspects of the distribution network. [0003] The distribution network with distributed power will also change from the traditional natural ...

AI Technical Summary

Problems solved by technology

In order to meet the demand for power flow calculation of distribution networks with distributed power generation, most of the conventional power flow calculation methods are improved according to the calculation model of distributed power generation, but after improvement, it is still necessary to solve nonlinear equations through multiple iterations. To obtain the voltage distribution results, this method still has the problems of complex calculation and slow convergence. If it is necessary to calculate the power flow of a complex distribution network with many distributed power sources and a large scale, the calculation speed will be greatly reduced, and it is difficult to meet the requirements of distributed power. Engineering Requirements for Fast Power Flow Analysis of Power Distribution Network

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