DWIG alternating-current and direct-current power generation system used for microgrid and method for bidirectional energy flow within wide air velocity range

Abstract

The invention discloses a DWIG alternating-current and direct-current power generation system used for a microgrid and a method for bidirectional energy flow within a wide air velocity range, and belongs to the technical field of alternating-current and direct-current microgrids. The system comprises a main circuit, a detecting circuit and a control circuit. The main circuit comprises a DWIG, a filter inductor, a power converter, a first breaker, a second breaker, a third breaker and a fourth breaker. The detecting circuit comprises a first alternating-current current sensor, a direct-current current sensor, a second alternating-current current sensor, a first direct-current voltage sensor, a second direct-current voltage sensor, a first alternating-current voltage sensor, a second alternating-current voltage sensor, a third alternating-current voltage sensor and an air velocity sensor. The control circuit comprises a digital signal processor and a drive circuit. According to a control method, one power generator can generate alternating currents and direct currents at the same time, the power converter is used fully in a zero-wind area, the air velocity range of operation of the DWIG power generation system is broadened, and bidirectional energy flow within the wide air velocity range is achieved.

Description

technical field [0001] The invention discloses a DWIG (Dual Stator-Winding Induction Generator, stator double-winding asynchronous generator) AC and DC power generation system for a micro-grid and a bidirectional energy flow control method within a wide wind speed range, especially a stator for a micro-grid AC-DC hybrid power generation A double-winding asynchronous motor power generation system and a method for controlling bidirectional energy flow within a wide wind speed range belong to the technical field of AC-DC hybrid microgrids. Background technique [0002] The current energy shortage and the environmental problems caused by traditional energy have promoted the large-scale access and utilization of clean energy, improved energy utilization efficiency, and implemented major technology industrialization projects for smart grids. Change is significant. From the perspective of the progress of smart grid construction in various regions of the world, the hot spots of sma...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to address the shortcomings of the above-mentioned background technology. It provides a DWIG AC and DC power generation system for microgrids and a two-way energy flow method in a wide wind speed range to solve the need to build independent AC power generation in the microgrid for alternating current and direct current. system and DC power generation system, traditional AC-DC hybrid micro-grid grid connection requires additional rectification and inverter devices, the system does not generate power due to idle power converters in windless areas, and the DWIG power generation system realizes bidirectional energy flow within a narrow speed range. technical problem

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