System and method for judging small-disturbance stability of grid-connected photovoltaic system on basis of FPGA (Field Programmable Gate Array)
A photovoltaic system and stability technology, applied in photovoltaic power generation, single-grid parallel feeding arrangement, special data processing applications, etc., can solve the lack of mechanism analysis of photovoltaic power generation system stability, no controller parameters are designed, and no detailed consideration is given. Mathematical model of photovoltaic cell group and control model of grid-connected inverter
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[0049] Embodiment: a small disturbance stability judging system of a grid-connected photovoltaic system based on FPGA (see figure 1 ), including a power grid, is characterized in that it includes a photovoltaic array, a Boost DC conversion unit, a DC / AC AC conversion unit, a filtering unit, an interface circuit, a display unit and a central processing unit; wherein, the input terminal of the Boost DC conversion unit receives The output current of the photovoltaic array is connected to the input end of the DC / AC AC conversion unit; the input end of the filter unit is connected to the output end of the DC / AC AC conversion unit, and the output end is connected to the power grid; the interface circuit The collected signal is output to the central processing unit, and the output terminal of the central processing unit is connected to the display unit.
[0050] The filtering unit (see figure 1 ) is the LC filter.
[0051] The interface circuit (see figure 1 ) is composed of a vol...
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