PHOTOVOLTAIC SOLID-STATE TRANSFORMER, PHOTOVOLTAIC INVERTER SYSTEM, AND BIDIRECTIONAL HIGH-VOLTAGE CURRENT TRANSFORMER

摘要

To provide a photovoltaic solid-state transformer for improving overall efficiency and reducing volume of a system.SOLUTION: A photovoltaic solid-state transformer, a photovoltaic inverter system, and a bidirectional high-voltage current transformer are provided. The photovoltaic solid-state transformer includes a plurality of single phase modules and a filter. Each of the single phase modules includes a plurality of multiple-output isolated DC/DC converters and a plurality of cascade connected DC/AC modules. The multiple-output isolated DC/DC converters include a DC/AC module, a high frequency transformer, and AC/DC modules. Specifically, an input end of the cascade connected DC/AC module is connected to at least one output end of AC/DC modules, output ends of the plurality of cascade connected DC/AC modules are cascade connected, and the plurality of single phase modules and the filter are connected on grid in a star connection or a delta connection.SELECTED DRAWING: Figure 2