A Dual Current Feedback Control Method Applied to Bidirectional Grid-Connected Converter
A feedback control and converter technology, which is applied in the field of dual current feedback control, can solve the problems affecting the stable operation of the system, increasing the harmonic amplitude of grid-connected current, etc., achieve good high-frequency harmonic suppression ability, and reduce grid-connected current Harmonics, reducing the effect of PI regulation
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[0047]The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0048] A dual current feedback control system applied to a two-way grid-connected transducer, such as figure 1 As shown, including the converter topology circuit and the control circuit, wherein the specific structure of the topology circuit is: three-phase AC / DC converter, the converter is built from 6 IGBTs and 6 anti-parallel diode tubes, three-phase AC / DC converter DC side via a steady capacitor C dc Connected to the DC bus, the three-phase AC / DC converter AC side is connected to the AC grid through the LCL filter, where the LCL filter contains inductance L on the three-phase AC / DC converter side. 1 , Filter capacitance C and inductance L connected to the AC grid 2 ;
[0049] Control circuit includes: improved salary control calculation, its input is the actual value of DC bus voltage U dc DC bus voltage rating U N , Output is output I L...
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