Efficient insulation DC (direct-current) converter system in photovoltaic power generation system
A photovoltaic power generation system, a technology of isolating DC, applied in photovoltaic power generation, converting DC power input to DC power output, adjusting electrical variables, etc., can solve the problems of increasing system power loss, hidden dangers, leakage current, etc. Conversion efficiency, ensuring safety and reliability, and achieving the effect of power output
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[0032] A specific example of the present invention is as follows:
[0033] Solar photovoltaic cell input DC voltage: V PV =30~38 V ;
[0034] Output DC bus voltage: V o =380 V ;Output Power: P o =1kW;
[0035] The DC transformer DCX is the switching frequency of the full-bridge LLC converter 2: f s =120kHz; resonant frequency: f r =120kHz; resonant inductance: L r =1.13uH; resonant capacitor: C r =1uF; excitation inductance: L m =7.78uH; second isolation transformer T r2 Ratio of primary and secondary sides: 1:10; switching tube Q 2 , Q 3 , Q 4 , Q 5 : IPP030N10N3G;
[0036] DC transformer DCX output current: I o_LLC =2.6 A ;rectifier diode D R5 , D R6 , D R7 , D R8 : IDT10S60C.
[0037] The power compensator PVR is the flyback circuit 1 switching frequency: f s =50kHz; the first isolation transformer Tr 1 Ratio of primary and secondary sides: 1:1; switching tube Q 1 : IPP200N25N3G; inductance: L =163uH; Freewheeling diode D 1...
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