Multi-target distribution network reconstruction method considering distributed generation and load uncertainty

Abstract

The invention discloses a multi-target distribution network reconstruction method considering distributed generation and load uncertainty. Wind power output force, photovoltaic power generation and load uncertainty are taken into consideration in the method. The three most important evaluation indexes, of optimized operation of a distribution network, including active loss, minimal voltage value of nodes and load balancing degree, namely three optimizing reconstruction targets, are given. Wind power output force, photovoltaic power output force and load uncertainty factors are processed through a scene analytical method. The final reconstruction scheme is obtained through multi-target disturbance biogeographic algorithm and fuzzy set theory. A multi-target reconstruction decision solution can be rapidly found, and high searching efficiency is ensured. Under an absorbing distributed power supply condition, various indexes of a network can be improved substantially through network reconstruction, so that the reconstruction is more adaptable to a real decision-making process.

Description

technical field [0001] The invention belongs to the technical field of power system operation analysis and control, and in particular relates to a multi-objective distribution network reconfiguration method considering distributed power sources and load uncertainties. technical background [0002] In recent years, wind power and photovoltaics, as non-polluting and renewable green energy, have been more and more widely used around the world, and the proportion of integration is increasing. The actual power system itself has many uncertain factors such as load fluctuations, and the grid connection of wind power and photovoltaics has further aggravated its uncertainty, posing new challenges to the traditional distribution network reconfiguration technology. [0003] As the basis for implementing smart grid in the future, distribution network reconfiguration technology is one of the key technologies of distribution automation, which plays an important role in ensuring power qual...

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Problems solved by technology

However, distribution network reconfiguration is actually a complex nonlinear multi-objective combination optimization problem. Scholars at home and abroad have recently done some research on this, but in the selection of multi-objectives, previous studies have not considered comprehensively. In addition, the distribution network The processing of uncertain factors is also relatively complicated, so the present invention discloses a new multi-objective distribution network reconfiguration method that takes into account the uncertainties of distributed power sources and loads

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