Method for controlling grid-connected inverter based on feed-forward compensation
A technology of feed-forward compensation and control method, applied in the direction of output power conversion device, AC power input conversion to DC power output, electrical components, etc., can solve the problems of complicated design and difficult implementation of current controller, and achieve the elimination of amplitude Effects of gain peaking, large stability margin, and simplified design
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[0025] In order to describe the present invention more specifically, the control method of the grid-connected inverter of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0026] Such as image 3 As shown, a control method of grid-connected inverter based on feed-forward compensation includes the following steps:
[0027] (1) Acquisition of grid voltage v g , the grid side current and the capacitor current of the LCL filter;
[0028] In this embodiment, the grid-connected inverter converts 450V direct current into 220V alternating current, which is filtered by an LCL filter and then input to the grid.
[0029] The grid-connected inverter is a 5kW single-phase voltage source inverter VSI, which has 4 IGBTs (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), and the switching frequency of the IGBTs is 8.4kHz.
[0030] The LCL filter includes the inverter side inductance L 1 , ...
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