Electrolytic hydrogen production rectification power supply based on high-transformation-ratio transformer and control method

Abstract

The invention discloses a control method of an electrolytic hydrogen production rectification power supply based on a high-transformation-ratio transformer. The control method comprises the following steps of: acquiring the voltages ua, ub and uc of an alternating current bus, and acquiring an output voltage udc1 of a 6-pulse thyristor rectifier and an output voltage uinv of a single-phase H-bridge inverter; obtaining a reference phase of the a-phase voltage ua by using a phase-locked circuit; adjusting the output voltage of the 6-pulse thyristor rectifier through a control signal; determining a control signal of the single-phase H-bridge inverter according to a target voltage, and adjusting the output voltage of the single-phase H-bridge inverter to a target value through the control signal; and after a high-transformation-ratio step-down transformer is connected in series, obtaining compensation voltages ucom which are equal in amplitude and ripple voltage component and opposite in direction to achieve ripple compensation, and enabling voltages at the two ends of a load to be constant direct currents. A rectification power supply adopts a series connection structure and is isolated by a transformer, so that the rectification power supply cannot generate a circulating current and is more reliable and stable.

Description

technical field [0001] The invention relates to the technical field of hydrogen production by water electrolysis, in particular to an electrolytic hydrogen production rectifier power supply and a control method based on a high-variable-ratio transformer. Background technique [0002] In recent years, with the intensification of global environmental pollution, energy crisis and global warming, the application and development of renewable energy has received more and more attention. As a zero-carbon green renewable energy, hydrogen energy has a high energy density. , high conversion efficiency, etc., can realize zero emission and zero pollution in the whole process from development to utilization. The preparation of hydrogen is an important part of the hydrogen energy industry chain. Existing hydrogen production technologies mainly include hydrogen production from fossil fuels and chemical by-products, hydrogen production from biomass, and hydrogen production from electrolyze...

AI Technical Summary

Problems solved by technology

In existing schemes, in order to industrialize large-scale hydrogen production, the electrolytic stack rectifier power supply usually uses a diode or thyristor rectifier with high power and low cost. This kind of power supply has large output ripple and low hydrogen production efficiency.

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