The present invention relates to a transformer for enabling a grid-connected solar inverter to be used in a stand-alone solar power generation system. More specifically, the present invention relates to a transformer for enabling a grid-connected solar inverter to be used in a stand-alone solar power generation system, configured to enable a high performance inverter used in a solar power generation system such as a grid-connected solar power generation system to be used in a stand-alone solar power generation system, thereby allowing for usage of high quality electricity at low costs in the stand-alone solar power generation system. When there is a need to make a transformation from the grid-connected solar power generation system to the stand-alone solar power generation system or a need to link batteries, the transformer can be simply installed between a solar cell panel and the grid-connected inverter, and a battery so that a facility of the existing grid-connected solar power generation system can be utilized as it stands. When the transformer is used in the grid-connected solar power generation system, it is possible to use, in the stand-alone solar power generation system, the grid-connected solar inverter which can be used as emergency power when an accident occurs due to a system problem related to the grid-connected solar power generation system. To this end, the transformer for enabling a grid-connected solar inverter to be used in a stand-alone solar power generation system comprises: a pressurizing inverter module configured to implement an environment similar to a grid-connected environment to cause a pressurized grid state; a charge controller module connected to a battery and configured to apply maximum voltage until the battery has reached full charge and maintain a charging voltage when the voltage is fully charged; a discharge controller module connected to the battery and configured to supply a predetermined voltage to an input side of the pressurized inverter module and prevent the battery from being dropped into a low voltage state; and a self-powered converter module configured to supply power using power of the battery.
展开▼
