Solar power generation system based on grid-connected and off-grid integration

• Main Author: JIANG GUOLONG
• Format: Patent
• Language: English
• Published: 04.03.2015
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

Provided in the invention is a solar power generation system based on grid-connected and off-grid integration. The solar power generation system is composed of a solar photovoltaic array, a grid-connected inverter, a household appliance inverter, an automatic charger, a storage battery group, a power grid, power grid, a household appliance load and a switch group. The switch group includes switches S1, S2, and S3. The solar photovoltaic array outputs an alternating current by the grid-connected inverter; the storage battery group outputs an alternating current by the household appliance inverter; and the solar photovoltaic array charges the storage battery group by the automatic charger. The grid-connected inverter is electrically connected with the solar photovoltaic array by the switch S1; the household appliance inverter is electrically connected with the household appliance load by the switch S3; and the switch S2 controls connection or disconnection between the grid-connected inverter and the power grid and the automatic charger. On the basis of different on-off combination units of the switches S1, S2, and S3, the system supports four kinds of different operation modes. According to the invention, the power generating capacity of the solar photovoltaic array is fully utilized and the utilization rate of the solar power generation system is substantially improved. Moreover, the user can carry out power generation by using the electric energy stored by himself, thereby bringing convenience for the life.