Control method of clamping-type three-phase non-isolation photovoltaic inverter with follow-current switch
A photovoltaic inverter and freewheeling switch technology, applied in photovoltaic power generation, AC power input conversion to DC power output, AC network circuits, etc., can solve the problem of increasing system electromagnetic interference, endangering personal and equipment safety, and affecting network access Current quality and other issues to achieve the effect of improving efficiency, reducing loss, and reducing common-mode voltage
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[0037] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings:
[0038] The control method of the clamped three-phase non-isolated photovoltaic inverter with freewheeling switch is only applicable to the clamped three-phase non-isolated photovoltaic inverter with freewheeling switch (the inverter circuit topology is as attached figure 1 Shown), a clamp-type three-phase non-isolated photovoltaic inverter with freewheeling switch, including solar cells U PV , Three-phase bridge inverter, filter circuit and load circuit, also including freewheeling switch and clamp circuit, three-phase bridge inverter including first to sixth switch tubes S 1 - S 6 , The filter circuit includes first to third filter inductors L a , L b , L c And the first to third filter capacitors C fa , C fb , C fc , The load circuit includes first to third resistors R a , R b , R c , The freewheeling switch includes the seventh switch...
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