| Photovoltaic power generation is an increasingly important part of the newenergy application field today, energy storage is prominent aspect of the wholesystem. The life of energy storage components directly affects the using time of theentire stand-alone photovoltaic power generation system; the main factors thataffect the storage components are as follows: the depth of discharge, environmenttemperature, the charging voltage. This paper compared the energy storagetechnologies of photovoltaic systems and analyzed the models in the system, thedischarge management module of the stand-alone photovoltaic power generationsystem were further analyzed and designed.Firstly, the research background and significance of photovoltaic powergeneration system were summarized based on access to large amounts of referencesin this paper. The whole structure of stand-alone photovoltaic power generationsystem and application principles of various parts were described, then this paperdid necessarily analysis of the PV system battery discharge module.Secondly, the working principles of various components were analyzed, thenthis paper did the further research on the energy storage technology of thephotovoltaic system: on the one hand, this paper focused on the batteriy energystorage principles and modeling principles, then several commonly used batterymodel were introduced in the paper; on the other hand, the energy storage principlesand models of the super capacitor were studied in the paper, and then thebattery-super capacitor hybrid-powered model was analyzed in the paper; and thesolar photovoltaic hydrogen storage-fuel cell power generation systems werecomprehensive analyzed, such as the composition, system operation principles andapplication aspects.Finally, the discharge module design was divided into three parts as follows:DoD control circuit design, the temperature compensation circuit design, two setsbatteries alternating charge and discharge control research; simulation and experimental verification were did for each part of the circuit. The results show thatthe designed circuit have better effects on DoD control and reducing outsideambient temperature interference of the battery. |
