Front feed type voltage drop dynamic compensating device based on complementation of wind electricity and solar electricity

A front feed type voltage drop dynamic compensating device based on complementation of wind electricity and solar electricity comprises a controller, a rectification unit, an H bridge inversion unit, a by-pass switch, a wind electricity direct voltage sensor, a wind electricity direct current sensor, an alternating voltage transformer, a direct current boost unit, a solar electricity direct voltage sensor, a solar electricity direct current sensor and a grid connected inverter. When a power grid normally runs, the wind electricity and the solar electricity feed electric energy into the power grid through the grid connected inverter, and output voltage of a series compensator is zero. When the power grid breaks down and voltage of the power grid drops (sinks or suddenly dips), the series compensator is controlled to rapidly output corresponding compensatory voltage so as to directly and dynamically compensate voltage drop and keep voltage of a load end unchanged, and accordingly a load is prevented from being influenced by faults of the power grid, and simultaneously direct current bus voltage is kept stable. The front feed type voltage drop dynamic compensating device based on the wind electricity uses the complementation of the wind electricity and the solar electricity, has the characteristics of complementary front feed and rapid power grid voltage change compensation of the wind electricity and solar photovoltaic electricity generation, and is small in size and low in cost.