High-gain coupled inductor voltage doubling quadratic converter

To solve the problem of low output voltage in renewable energy systems, a novel quadratic Boost converter is proposed. A clamping branch is added to the quadratic structure of the converter. On this basis, the voltage-doubling structure composed of a coupled inductor, diodes and capacitors is combined, and the improved structure can effectively recover the leakage inductance energy of the coupled inductor, significantly increase the voltage gain, effectively reduce the voltage stress of the switching tube, and reduce the device loss. The working process and steady-state performance of the converter are analyzed, and the voltage gain, voltage stress of components, etc. are derived. By comparing the performance of the same type of quadratic converter with coupled inductor, the superiority of this converter is proved.