Control structure of double-fed AC-DC-AC converter for wind power generation
An AC-DC-AC converter and control structure technology, which is used in wind power generation, conversion equipment for intermediate conversion to DC conversion, single-grid parallel feeding arrangement, etc.
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[0018] See Figure 1-Figure 4 .
[0019] The rotor excitation power supply of the doubly-fed wind generator is an AC-DC-AC converter device, which is the connection of two converters through an intermediate DC link.
[0020] The grid-side converter software is divided into two parts, the main program module and the interrupt service program module. The main program module mainly completes the initialization of the system. The functions include the initialization of system registers, the initialization of peripheral module control registers, the initialization of special registers in the DSP, the initialization of user-defined variables, the opening of the interrupt and the waiting to enter the interrupt service subroutine.
[0021] The interrupt service program is the core part of the entire grid-side converter, and most of the work is done in the interrupt service program. Since the switching frequency required to drive the IGBT is generated as a PWM signal of 10K Hz, the time req...
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