Solar AC power generation system

Abstract

The invention discloses a solar photovoltaic power generation system comprising a solar cell panel, a sending module, a charging and discharging controller, an energy-saving switch, an inverter and an EMC filter. The solar cell panel converts solar light energy into direct current energy via a photovoltaic effect. The sending module is used for sending the direct current energy to the charging and discharging controller. The charging and discharging controller is used for performing charging and discharging control on the direct current energy sent by the sending module, and current after charging and discharging control is transmitted to the inverter. The inverter is used for receiving direct current of the charging and discharging controller, and the direct current is transmitted to a transformer. The EMC filter is connected with the transformer and the charging and discharging controller and used for filtering alternating current outputted by the transformer. The energy-saving switch is used for turning off the system when a light ray signal is lower than a preset value through detection. According to the system, overcharge and over-discharge of a storage battery can be protected, and counter current of current can also be prevented via a function of recovering overcharge and over-discharge.

Description

technical field [0001] The invention belongs to the field of power generation systems, in particular to a solar AC power generation system. [0002] Background technique [0003] As an efficient and pollution-free new energy source, solar energy is a substitute for conventional energy in the next century. At present, solar photovoltaic power generation is one of the important applications of solar photovoltaic. [0004] Energy is an important material for economic and social development and improvement of people's lives. Energy issues are the key to a country's development. In our country, since the 1990s, the contradiction between energy supply and demand has become increasingly prominent, and the energy shortage has become increasingly serious. The current energy structure is mainly fossil fuels such as coal, oil, and natural gas. With the development of science and technology and the increase of population, the energy demand of human beings is constantly increasing. At...

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Problems solved by technology

[0012] In the process of research, the inventor found that when there is no light, it may cause the reverse flow of current and damage the battery. At the same time, the overcharge, overdischarge protection and recovery functions of the battery are still a problem to be solved.

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