Distributed photovoltaic grid-connected acceptable capacity calculating method based on improved Big Bang-Big Crunch

Abstract

A distributed photovoltaic grid-connected acceptable capacity calculating method based on improved Big Bang-Big Crunch. The distributed photovoltaic grid-connected acceptable capacity calculating method based on the improved Big Bang-Big Crunch comprises the steps of basic data acquisition, model building, algorithm parameter initialization, initial fragment solution generation, fitness evaluation, gravitational solution generation, explosion iteration cycle, cycle termination judgment and the like. According to the present invention, modeling is carried out on the problem of the maximum accessibility capacity of distributed photovoltaics in a power distribution system fro the angle of planning of a power distribution network so as to establish a grid-connected photovoltaic maximum accessibility capacity model which uses the distributed photovoltaic access capacity maximization as a target function and uses a system power flow constraint, an operating voltage horizontal constraint, a branch circuit current limitation, a voltage harmonic distortion rate limitation, a short circuit current limitation and the like as constraint conditions; solution is carried out by an improved Big Bang-BIg Crunch optimal searching method; and the distributed photovoltaic grid-connected acceptable capacity calculating method can provide guidance for planning, building and operation of a photovoltaic access system.

Description

technical field [0001] The invention belongs to the technical field of power distribution system planning, and in particular relates to a distributed photovoltaic grid-connected capacity calculation method based on the improved Big Bang-Big Crunch. Background technique [0002] In the context of the global depletion of fossil energy and the deteriorating environmental problems, photovoltaic power generation is considered to be a form of renewable energy utilization with great potential. According to the forecast of the global authoritative energy agency, solar energy will become an important part of human energy composition in the middle of this century, and will become the main part of human energy composition by the end of this century. Due to the unavoidable influence of weather and other external environmental factors, photovoltaic power generation is intermittent and volatile, so a large number of photovoltaic power generation connected to the grid will have a variety o...

AI Technical Summary

Problems solved by technology

Due to the limitations of the calculation scale and the differences between the actual system and the ideal system, there are still certain limitations in the application of simulation methods and analytical methods to actual power distribution systems.

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