Research On Model And MPPT Algerthm Of PV-array Shaded By Moving Cloud

As the world of fossil energy constantly exhausted and the increasingly s e-rious environmental pollution, the research and utilization of renewable energyand green energy have become maintain necessary means of survival and devel-opment of the human. In recent years, with the solar photovoltaic power genera-tion technology advances and the rapid development of photovoltaic industry, PVpower show great potential of development, can be one of the main energy infuture.The main research object of this paper are the photovoltaic array and itsmodel, which shading of moving shadow, and photovoltaic array in the shadowsand move the shadow of the output characteristics and mobile shadow of photo-voltaic array covered by the most power tracing algorithm is studied. This articlemainly and results are as follows:(1) First of all, this paper studys on mobile shadow of photovoltaic arraymodel. This paper in order to the suggestion of the shadow of photovoltaic arrayresearch, through the practice of photovoltaic array may produce local keep outcloud sampling and the cloud cover on photovoltaic array of the research into thecauses of the cloud shadows on the actual and the classification, set the actualphotovoltaic array, established on photovoltaic array produces may move theshadow of typical samples and in the shadow of the pv array movement modeland photovoltaic array changing with time characteristic curve, for the m obileshadow covered with pv array MPPT research established the model.(2) Study the output power and voltage characteristic of photovoltaic arrayin the shadows. This paper first analyzes the pv array in partly covered, powercurve on the causes of the local extreme value point; Then, the article analyzesthe pv array in a shadow covered by its output curve characteristics and localextreme value point position produce and position moving; Finally, according tomove in the shadow of the pv array of photovoltaic array output characteristiccurve the change law of analysis and study, in the shadow of photovoltaic arraymobile local extreme value point change rules were discussed deeply forphotovoltaic array of the MPPT algorithms for good ideas and and theoreticalbasis.(3) Studied of the existing on photovoltaic array of the MPPT algorithm.Combining different ideas and characteristics of the MPPT, built a modifiedparticle swarm algorithm to search for the main moving shadow covered with pvarray MPPT algorithm. First of all, for on photovoltaic array MPPT control particle swarm algorithm particle initial value given situation analysis andresearch; Second, this paper analyzed and researched the main influence factorson iterative-with the photovoltaic array inertia silver output characteristics;Again, establish the adaptive particle count of particle swarm optimizationphotovoltaic array MPPT algorithm. Finally, combined with particle swarm toextreme value point search features strong variable step and long disturbancelocal stability good observation convergence speed of characteristics, based ontheir mobile shadow of photovoltaic array MPPT algorithm, and keep out of theshadow based on sample under photovoltaic array model simulation and analysis.