A hydrogen production converter topology and control method suitable for connecting to a single-phase AC system

A single-phase AC, topology technology, applied in the direction of AC power input conversion to DC power output, control/regulation systems, DC power input conversion to DC power output, etc. Fast tracking, improving current output capability, and achieving the effect of power balance

Active Publication Date: 2021-12-07
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the control method described in the document "Guangdong Electric Power, 2019, vol.32, No.5 Modeling and Control of Controllable Direct Drive Permanent Magnet Wind Turbine Based on Wind Power Hydrogen Production and Supercapacitor Hybrid Energy Storage" can realize DC / DC conversion It is based on the PI regulator to design the output current controller of the hydrogen production converter. However, this method cannot be directly connected to the AC power supply. It is necessary to design a one-way AC / DC converter to supply power for the hydrogen production device and provide suitable electrolyzers. Voltage level

Method used

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  • A hydrogen production converter topology and control method suitable for connecting to a single-phase AC system
  • A hydrogen production converter topology and control method suitable for connecting to a single-phase AC system
  • A hydrogen production converter topology and control method suitable for connecting to a single-phase AC system

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Embodiment 1

[0038] refer to Figure 1~3 , this embodiment provides a hydrogen production converter topology suitable for connecting to a single-phase AC system, including four parts: an AC power supply 100, a front-stage rectification module 200, a second-stage conversion module 300, and a control system module 400. Among them, the AC power supply 100, the AC power supply 100 is a single-phase AC voltage source, the AC power supply 100 is connected in parallel with the front-stage rectification module 200 after being connected in series with the AC reactance, and the low-voltage end after parallel connection is connected with the ground point; the front-stage rectification module 200, the front-stage The rectifier module 200 has multiple sets of DC output terminals, and all the DC output terminals of the front-stage rectifier module 200 are connected to the DC input terminals of the second-stage conversion module 300; the second-stage conversion module 300 has multiple sets of DC output te...

Embodiment 2

[0046] refer to Figure 1~5 , which is the second embodiment of the present invention, this embodiment is based on the previous embodiment, and the difference from the previous embodiment is that this embodiment provides a hydrogen production converter suitable for connecting to a single-phase AC system The control method of the topology structure, the control structure of the pre-stage rectification module 200 in S1 includes the following calculation process:

[0047] S11: Calculate the phase of the power grid: connect the AC voltage sampling value Ug to the phase-locked loop PLL through the delay link, delay 5ms, and calculate the phase signal θ of the AC voltage source grid .

[0048] S12: Calculate the AC current phase: the average value of the capacitor voltage is given and the average value u of all full-bridge module capacitor voltages avg Make a difference, the difference is connected to the input terminal of the first proportional-integral regulator PI1, and the o...

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Abstract

The invention discloses a hydrogen production converter topology and control method suitable for connecting to a single-phase AC system. The low-voltage end after parallel connection is connected to the grounding point; the front-stage rectification module has multiple sets of DC output terminals, and all the DC output terminals of the front-stage rectification module are connected to the DC input terminals of the second-stage conversion module; the second-stage conversion module has multiple sets of All DC input terminals and DC output terminals are connected to the corresponding DC output terminals of the front-stage rectification module, and all DC output terminals of the second-stage conversion module are connected in parallel with each other. The positive and negative poles of the parallel-connected DC output terminals are respectively It is connected with the anode and cathode of the electrolytic cell; it also includes a control system module to calculate and output control signals; the invention further improves the current output capability, realizes the transformation from high-voltage AC to low-voltage DC, and is easy to realize a higher voltage conversion ratio.

Description

technical field [0001] The invention relates to the field of hydrogen production by electrolysis of water, in particular to a topology and control method of a hydrogen production converter suitable for connecting to a single-phase AC system. Background technique [0002] New energy technology has developed rapidly in recent years, and its proportion in the backbone network and distribution network has continued to increase. The consumption and storage of new energy has become one of the bottlenecks in the development of large-scale new energy, such as large-scale wind farm abandonment and other phenomena It is becoming more and more serious and urgently needs to be resolved. Hydrogen production by electrolysis of water provides a new solution for energy consumption. The electrolyzed water can be fresh water or treated seawater, its raw material cost is low, hydrogen can be compressed and stored, used in industrial production and manufacturing of fuel cells, etc. The conver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/219H02M3/335
CPCH02M3/3353H02M7/219
Inventor 吴杰李传江茅红伟
Owner SHANGHAI NORMAL UNIVERSITY
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