Charging unit, grid-connected isolation system and frame thereof

Abstract

The invention discloses a grid-connected isolation system and a charging unit, and the system comprises a filter circuit which is disposed at the connection part of the charging unit and a user power grid; the adjusting circuit is electrically connected with the filter circuit; the output circuit is arranged at the joint of the charging unit and the battery notch; and the temporary charging circuit is connected to an external special C interface of the charging unit. And a control chip is arranged between the adjusting circuit and the output circuit. A lithium battery unit, an execution unit and a disconnecting link; the lithium battery unit is electrically connected with the charging unit and is connected with an execution unit; the execution unit comprises a relay driving unit, an MCU, a man-machine interaction unit and a high-frequency coupling unit; the execution unit is connected with a disconnecting link, and the disconnecting link responds according to electric signals output by the execution unit. The user power grid is formed by accessing a plurality of user systems into the district power grid; the user system comprises an isolation device; the isolation device is arranged at the grid-connected part of the user new energy device; a grid-connected isolation system is arranged in the isolation device; and a handheld device is arranged at the user power grid end.

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