A combined three-phase inverter power supply based on pr inner loop control
A three-phase inverter, combined technology, applied in the direction of converting irreversible DC power input to AC power output, electrical components, output power conversion devices, etc., can solve the mutual coupling and steady-state characteristics of three-phase inverter power supply. It is difficult to take into account the problems of and dynamic characteristics, and achieve the effect of accurate and fast short-circuit current limiting capability, fast dynamic response, and fast inner loop response speed.
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[0044] The present invention will be further described below in conjunction with accompanying drawing.
[0045] like figure 1 As shown, the combined three-phase inverter power supply based on the PR inner loop control of the present invention includes a DC filter circuit 1 for filtering the DC voltage, a three-phase independent A (BC) phase bridge high-frequency modulation circuit 2, A three-phase independent A (BC) phase AC filter circuit 3, a sensor group 4 for respectively collecting three-phase output voltage and output current, and an isolated three-phase transformer 5.
[0046]The invention performs independent dual-loop control based on PR current inner loop control and PI voltage outer loop control under virtual synchronous rotating coordinate system for each phase. The control module of each phase includes an independent virtual static-synchronous rotation transformation operator 6, a voltage D-axis PI operator 7, a voltage Q-axis PI operator 8, a synchronous-static ...
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