SVG multi-machine parallel system based on CAN bus and carrier synchronization control method thereof

The invention discloses an SVG multi-machine parallel system based on a CAN bus and a carrier synchronization control method thereof. The system comprises a preset number of SVG units, a current transformer and a CAN bus. The system is characterized in that any SVG unit on the CAN bus can be set as a host in a parameter setting form, and other SVG units are set as slaves; the current transformer is arranged on a bus in a sleeving mode, the SVG unit host and the slave are sequentially connected with secondary signals of the current transformer in series, only the SVG unit host collects signalsof the current transformer to carry out compensation current instruction calculation, and the SVG unit host and the slave collect a bus voltage through respective power grid voltage signal detection modules respectively; and moreover, any SVG unit can be set as a host through parameters, the other SVG units are set as slaves, when the SVG units break down, system operation can be recovered by reconfiguring the host and th