The Design Of Micro-hybrid Solar Deployment Control System

With the rapid consumption of renewable energy reserves in the world, vigorously developing solar energy is the only way to establish a cleaning and sustainable developing energy system.Due to the impact of climate and the limit of battery capacity, Photovoltaic power generation exists many problems in power quality and sustainable supplying of electricity.So,the micro-hybrid photovoltaic power generation system with user-oriented side will become the hot-spot of researching and application in the photovoltaic industry because of its flexible use.This thesis proceed from the management of solar energy deployment,combined with the deployment of intelligent energy control and operating the characteristics of Static Transfer Switch, in order to exploit solar energy and grid mains optimally.The system supply stability sustainable power for user under adequately protecting to the energy storage unit.The detailed analysis of the maximum power point tracking algorithm,voltage sag detection methods,the lead-acid battery residual capacity estimation method and the intelligent deployment control of energy management strategies and to achieve intelligent control and stability work of system.On the basis of system principle and theoretical analysis,a modular hybrid deployment control system which uses STM32F103VCTb processing chip as the core is designed on the premise of hardware and software designing of various modules in system.On the hardware side, the whole system is divided into MPPT&DC/DC module, inverter module, Static Transfer Switch module and the intelligent deployment of energy management module.On the system control strategy side,firstly,targeted the staggered parallel intermittent buck circuit, a constant voltage start-up control correction variable step size incremental conductance MPPT control strategy is Proposed to improve the response speed and accuracy of the MPPT simply and effectively.Secondly,Based on the improved d-q method in voltage sag detection,a Static Transfer Switch which applied to the present system is designed to "Seamless" safety switch between the solar energy storage power supply and mains. Finally,a effective deployment of energy programs is formulated to achieve Unified management of the status of each module in order to achieve energy optimization management.The simulation and experimental results show that the design of the hybrid deployment control system has flexible use and can effectively achieve the optimalutilization of system energy and stabile and sustainable power supply.