Research On Optimization Configuration In Stand-alone Household Micro-grid

Micro-grid is a very unique and complex dynamic system.This article selected the stand-alone household micro-grid as the object of study.Aiming at technical problems of the micro-grid power configuration in the early years of the construction,considering the uninterrupted power supply and double objective functions,the exhaustive search algorithm and artificial bee colony algorithm were respectively used to optimize the power configuration of the stand-alone household micro-grid.The main contents were as follows:(1)The power consumption models of all kinds of typical household loads were analyzed.The household loads were divided into four categories: the basic loads,the controllable loads,the transferable loads and other loads.Among them,the transferable loads and the controllable loads had a greater influence on the total loads,and they could be controlled according to the peak peel intelligently.Besides,taking the Hangzhou area as an example,the historical characteristics of wind power and light could be got based on the investigation of the landscape resources in the home obtained.They provided the basic input data for the optimization configuration of the micro-grid.(2)The exhaustive search algorithm was designed for the stand-alone household micro-grid optimization configuration.To achieve uninterrupted power supply as the main constraint,minimizing the integrated total cost as the main target,under the constraints of the balance of power and batteries' state of charge(SOC),the capacity of each power component in the micro-grid was optimized.Setting Hangzhou area as example,the simulation results showed that the capacity of photovoltaics was inversely proportional to the capacity of batteries,and the capacity of batteries had a minimum requirement.Then the integrated total cost had a optimal value.(3)Artificial bee colony algorithm was applied in multi-objective optimization configuration of the stand-alone household micro-grid.Setting the higher powersupply reliability and lower total integrated cost as the objective function,Pareto optimal solutions of each part in the stand-alone household micro-grid were got.The results showed that,although the power supply reliability was decreased,the integrated total cost was reduced.(4)An experimental platform was built for verification according to the configuration scheme of uninterrupted power supply..The meteorological data acquisition device was used to collect the resources of wind and solar data of a year in Hangzhou.The characteristic curve of household loads was recorded.The SOC curve which was counted for a year in the household micro-grid verified the optimized configuration of uninterrupted power supply requirements.