Simplified modeling method for power distribution network connected with distributed power sources

Abstract

The invention provides a simplified modeling method for a power distribution network connected with distributed power sources. According to the large-scale power distribution network connected with the distributed power sources, the simulating calculation speed is limited greatly by nonlinear features of the distributed power sources, and when the number of nodes and branches of the power distribution network is large, the excessively high network matrix dimensionalities will further lower the simulating calculation speed. The power distribution network connected with the distributed power sources is divided into an internal linear region and an external non-linear region, a net rack of the power distribution network and the distributed power sources are simplified, the new modeling method for the power distribution network connected with the distributed power sources is obtained, the dynamic process of a system can be accurately simulated, and the simulating speed of the system is greatly increased. By means of the modeling method, the simulation accuracy and quickness are guaranteed, and a new technology is provided for quick simulation of the large-scale power distribution network connected with the distributed power sources.

Description

technical field [0001] The invention belongs to the field of power systems, in particular to a simplified modeling method for a distribution network with distributed power access. Background technique [0002] With the continuous development of economy and society, energy consumption continues to increase, non-renewable resources are gradually exhausted, and environmental pollution problems such as smog caused by this are becoming more and more serious, which directly promotes the development of new energy to become a strategic demand for future energy development in various countries. In this context, distributed generation (Distributed Generation, DG) has developed rapidly in recent years. However, the access of large-scale distributed power to the traditional distribution network will have an important impact on the power balance of the distribution network, the economic operation of electrical equipment, line flow, voltage drop, power loss, power quality, and switchgear ...

AI Technical Summary

Problems solved by technology

For the linear distribution network frame part, when there are many nodes and branches in the distribution network, it will be relatively difficult to directly analyze or the numerical simulation will take too long due to the high dimension of the network matrix, and the solution time of the model It is quite considerable, so for large or complex distribution network systems, it is necessary to find a method to effectively reduce the scale or order of the model, reduce the amount of data calculation, and achieve the purpose of reducing the time-consuming simulation

For non-linear distributed power sources

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