Multipurpose solar energy power generating system

Abstract

The invention discloses a multipurpose solar energy power generating system. Solar energy battery board assemblies are mutually connected in series or in parallel to form a photovoltaic array; the multipurpose solar energy power generating system is connected to a power grid by a grid-connected inverter module; the grid-connected inverter module comprises a grid-connected inverter unit, a maximumpower point tracking control unit and a power grid state detecting unit, wherein the power grid state detecting unit can detect power grid operation state in real time and cuts off the connection of the grid-connected inverter module and the power grid when the power grid operation state is abnormal so as to prevent islanding; the grid-connected inverter module is also connected with an intelligent charger in parallel on the connection end with the power grid and is connected to a storage battery by the intelligent charger so as to charge the storage battery; the intelligent charger is also connected with an off-grid inverter in parallel on the connection end with the storage battery; and the off-grid inverter is used for supplying electricity for AC load. The solar energy power generatingsystem can be suitable for grid-connected power generation of various normal and abnormal situations on the power grid and has strong system robustness and fault tolerance.

Description

technical field [0001] The invention relates to a multi-purpose solar power generation system, in particular to a grid-connected photovoltaic power generation system that can adapt to various normal and abnormal conditions on the power grid. technical background [0002] Since the 20th century, with the development of social economy and the improvement of living standards, people's demand for energy has been increasing. At the same time, due to the limitation of fossil energy resources and their impact on the global climate and environment during the combustion process, people are increasingly concerned. Therefore, from the perspective of resources, environment and social development needs, the development and utilization of new energy and renewable Renewable energy is an inevitable trend. In the family of new energy and renewable energy, solar energy is the most attractive, most researched and most widely used field. [0003] Photovoltaic power generation technology is an...

AI Technical Summary

Problems solved by technology

The island effect may have adverse effects on the entire power distribution system equipment and user-side equipment, such as endangering the safety of maintenance personnel on the power grid transmission line, affecting the action program of the protection switch on the power distribution system, impacting the power grid protection device, and affecting the transmission of electric energy. The quality, power supply voltage and frequency of the power island area will be unstable, the phase will be out of sync when the grid power supply is restored, and the single-phase distributed power generation system will cause the three-phase load of the system to be out of phase. Therefore, for a grid-connected system, it must Able to perform anti-islanding effect detection to prevent the occurrence of islanding effects

If the anti-islanding function is added on the basis of the No. 200610164466.0 invention patent application, then when the power grid fails, the solution proposed by this invention cannot provide power for the load, neither can use solar energy, nor can it use the energy stored in the battery energy of

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