CN212463075U

CN212463075U - Power supply device suitable for high-power and ultra-high-power water electrolysis hydrogen production

Info

Publication number: CN212463075U
Application number: CN202022165683.XU
Authority: CN
Inventors: 刘培欣; 祝振鹏; 张丹; 夏显露
Original assignee: Shanghai Green Giant Aijue Energy Technology Co ltd
Current assignee: Shanghai Giant Energy Technology Co ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-02-02
Anticipated expiration: 2030-09-27

Abstract

The power supply device comprises a power output circuit consisting of an inductor, a capacitor, a transformer, an inverter and the like, wherein a control part adopts a DSP + FPGA and a DSP + CPLD framework, and through the superiority of topology and control strategy, the pollution of harmonic waves and power factors generated by high-power electronic equipment to a power grid is reduced, the grid-side harmonic waves are effectively reduced, the power factors are improved, and the system efficiency is improved so as to meet the application occasion of high-power electrolytic hydrogen production which is urgently needed at present.

Description

Power supply device suitable for high-power and ultra-high-power water electrolysis hydrogen production

Technical Field

The utility model belongs to the technical field of electrolytic hydrogen production, concretely relates to power supply unit suitable for high-power and super high power electrolytic water hydrogen production.

Background

With the national demand for green and environment-friendly energy, hydrogen is widely paid attention to and adopted as clean energy at present, wherein hydrogen is replaced by electrolyzed water, so that the hydrogen production method is a better environment-friendly hydrogen production method. The main high-power hydrogen electrolysis device in the market at present adopts a silicon controlled rectifier topological structure, and the topological structure has the conditions that the power factor at the side of a power grid is low, the current harmonic content is high, and a single machine cannot meet the requirements of the power grid, and particularly has high pollution to the power quality of the power grid in high-power application occasions, so that the normal operation of other equipment is influenced. Therefore, a direct-current high-power supply for electrolyzing water, which can solve the problem of harmonic content and the problem of power factor, is urgently needed to be developed for the application occasions of power electronics for electrolyzing hydrogen with high power.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem: the utility model provides a power supply unit suitable for high-power and super large power electrolytic water hydrogen manufacturing, the utility model discloses a topological graph and control strategy's change reduces the pollution of the harmonic and the power factor that high-power electronic equipment produced to the electric wire netting, effectively reduces net side harmonic, improves power factor, improves system efficiency, satisfies the application scenario of the present urgent need high-power electrolytic hydrogen manufacturing.

The utility model adopts the technical proposal that: a power supply device suitable for high-power and ultra-high-power hydrogen production by water electrolysis comprises a topological circuit for reducing network side harmonic waves and improving power factors, wherein the topological circuit comprises a transformer 1, an inductor L1, an inductor L2, an inductor L3, a rectifier 1, a smoothing reactor L4, an energy storage capacitor C1, a resistor R1, an inverter, an inductor L5, an inductor L6, an inductor L7, a transformer 2, a rectifier 2 and a rectifier 3; the input of the transformer 1 is connected with a power grid, the output of the transformer 1 is connected with an inductor L1, an inductor L2 and an inductor L3, the inductor L1, the inductor L2 and the inductor L3 are connected with the rectifier 1, the rectifier 1 is connected with an inverter through a smoothing reactor L4, an energy storage capacitor C1 and a resistor R1 are connected in parallel between a connecting pin of the smoothing reactor L4 and the inverter and a direct connecting pin of the inverter and the rectifier 1, the output of the inverter is connected with the input of the transformer 2 through the inductor L5, the inductor L6 and the inductor L7, the two outputs of the transformer 2 are respectively connected with the rectifier 2 and the rectifier 3, the rectifier 2 is connected with a load RL through a smoothing reactor L8, the rectifier 3 is connected with the load RL through a smoothing reactor L9, and the two ends of the load RL are connected in parallel with the energy storage capacitor C2.

In order to further limit the technical scheme, the transformer 1 is a star-delta transformer.

The technical scheme is further limited, the rectifier 1 adopts a multi-level rectifier, the rectifier 1 adopts a DSP + FPGA control platform and a high-precision peripheral sampling conditioning circuit for control, and the rectifier 1 samples the three-phase voltage of the power grid and sends the sampled voltage and current signals to the DSP and the FPGA for rectification control.

The inverter is controlled by a DSP + CPLD control platform, and performs high-precision sampling on the direct current voltage and the current output by the rear-stage load side and provides the sampled data for the DSP to be processed, so as to calculate the modulation ratio of the alternating current voltage to the current to be modulated; the DSP adopts a vector control strategy to rapidly control a voltage loop and a current loop, the current loop is a rapid response loop and adopts a rapid loop control strategy, and the voltage loop response speed requirement is second to that of the current loop and adopts a slow loop control strategy; the inverter outputs a stable and controlled alternating current fitting voltage which is supplied to a transformer 2 at the later stage through an inductor L5, an inductor L6 and an inductor L7 for energy transmission; the inversion frequency of the inverter is controlled between 500Hz and 200 Hz.

In a further limitation of the above technical solution, the transformer 2 is an intermediate frequency transformer, and the intermediate frequency transformer supplies the converted voltage to the rectifier 2 and the rectifier 3 through a YYY winding voltage conversion function.

In a further limitation to the above technical solution, the rectifier 2 and the rectifier 3 both adopt a diode full bridge rectifier.

The utility model has the advantages compared with the prior art:

the power output circuit comprises a rectifier, an inductor, a capacitor, an inverter, a transformer and the like, wherein a control part adopts a DSP + FPGA and a DSP + CPLD framework, and through the superiority of topology and control strategy, the pollution of harmonic waves and power factors generated by high-power electronic equipment to a power grid is reduced, the grid-side harmonic waves are effectively reduced, the power factors are improved, and the system efficiency is improved so as to meet the application occasion of high-power electrolytic hydrogen production which is urgently needed at present.

Drawings

Fig. 1 is a topological circuit diagram of the present invention;

FIG. 2 is a schematic diagram of the control hardware architecture of the present invention;

FIG. 3 is a diagram of a phase voltage current oscilloscope according to an embodiment of the present invention;

fig. 4 is a diagram of a level modulator of the rectifier 1 according to the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements" does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.

Referring to fig. 1-4, embodiments of the present invention are detailed.

A power supply device suitable for high-power and ultra-high-power hydrogen production by water electrolysis comprises a topological circuit for reducing grid-side harmonic waves and improving power factors, as shown in figure 1, wherein the topological circuit comprises a transformer 1, an inductor (L1, L2 and L3), a rectifier 1, a smoothing reactor L4, an energy storage capacitor C1, a resistor R1, an inverter, an inductor (L5, L6 and L7), a transformer 2, a rectifier 2 and a rectifier 3; the input of the transformer 1 is connected with a power grid, the output of the transformer 1 is connected with inductors (L1, L2 and L3), the inductors (L1, L2 and L3) are connected with the rectifier 1, the rectifier 1 is connected with an inverter through a smoothing reactor L4, an energy storage capacitor C1 and a resistor R1 are connected in parallel between a connecting pin of the smoothing reactor L4 and the inverter and a direct connecting pin of the inverter and the rectifier 1, the output of the inverter is connected with the input of the transformer 2 through inductors (L5, L6 and L7), the two outputs of the transformer 2 are respectively connected with the rectifier 2 and the rectifier 3, the rectifier 2 is connected with a load RL through a smoothing reactor L8, the rectifier 3 is connected with the load RL through a smoothing reactor L9, and the two ends of the load RL are connected in parallel with the energy storage capacitor C2.

The transformer 1 adopts a star-delta transformer, and the transformer 1 has the effect of isolating the voltage generated by equipment and a power grid, so that the influence on the safety of the power grid in the later-stage work is reduced.

The rectifier 1 is a multi-level rectifier, as shown in fig. 2, the rectifier 1 is controlled by a DSP + FPGA control platform and a high-precision peripheral sampling conditioning circuit, the rectifier 1 samples three-phase voltage of a power grid, sends sampled voltage and current signals to the DSP and the FPGA, and performs high-efficiency rectification control through a three-level algorithm and a control algorithm of a vector modulation technology. The PLL of the DSP performs phase locking on the power grid voltage; after phase calculation and a time sequence control command, the rectifier 1 controls the power device and the inductors (L1, L2 and L3) to enable the elements to work together, and controls the direct current voltage within a design range. The voltage waveform of the power device controlled by the rectifier 1 is shown in fig. 4, and the multi-level control strategy can effectively reduce harmonic waves in a power grid and improve the power factor. The voltage and current controlled by the power grid side are shown in fig. 3, so that the power factor measured by the power grid can be effectively improved.

The inverter is controlled by a DSP + CPLD control platform, as shown in fig. 2, the inverter performs high-precision sampling on the dc voltage and current output from the rear-stage load side and provides the sampled data to the DSP for processing, thereby calculating the modulation ratio of the ac voltage to the current to be modulated. The DSP adopts a vector control strategy to rapidly control the voltage loop and the current loop, the current loop is a rapid response loop and adopts a rapid loop control strategy, and the voltage loop response speed requirement is inferior to that of the current loop and adopts a slow loop control strategy. The inverter outputs a stable and controlled alternating current fitting voltage through advanced slip control theory, and the stable and controlled alternating current fitting voltage is supplied to a transformer 2 of the later stage through inductors (L5, L6 and L7) for energy transmission. The inversion frequency of the inverter is controlled between 500Hz and 200Hz, so that the transmission efficiency can be improved, the power level of a smoothing reactor at the rear stage can be reduced, and the power is promoted and miniaturized.

The transformer 2 is an intermediate frequency transformer which supplies the converted voltage to the rectifier 2 and the rectifier 3 through a YYY type winding voltage conversion function.

The rectifier 2 and the rectifier 3 both adopt diode full-bridge rectifiers.

The working principle is as follows: the three-phase alternating current is isolated by the power grid through the transformer 1, and then converted into direct current through the inductors (L1, L2 and L3) and the rectifier 1; the direct-current voltage rectified by the rectifier 1 is subjected to stabilizing and filtering treatment by a power smoothing reactor L4 and an energy storage capacitor C1 and then is supplied to a rear-stage inverter for inversion; the inverter supplies the intermediate frequency voltage obtained by inversion to an intermediate frequency transformer 2 through inductors (L5, L6 and L7), and finally outputs the direct current voltage and the direct current which need to be output to a hydrogen electrolytic cell through a smoothing reactor L8, L9 and an energy storage capacitor C2 through a diode full-bridge rectifier 2 and a rectifier 3. Thereby completing the stable hydrogen production process.

The utility model discloses by the power output circuit of constituteing such as inductance, electric capacity, transformer, dc-to-ac converter, control part adopts DSP + FPGA and DSP + CPLD framework, through topology and control strategy's superiority, reduces the harmonic that high-power electronic equipment produced and power factor to the pollution of electric wire netting, effectively reduces net side harmonic, improves power factor, improves system efficiency, satisfies the application scenario of the present urgent need's high-power electrolysis hydrogen manufacturing.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A power supply device suitable for high-power and ultra-high-power water electrolysis hydrogen production is characterized in that: the power factor improving circuit comprises a topological circuit for reducing grid-side harmonic waves and improving power factors, wherein the topological circuit comprises a transformer 1, an inductor L1, an inductor L2, an inductor L3, a rectifier 1, a smoothing reactor L4, an energy storage capacitor C1, a resistor R1, an inverter, an inductor L5, an inductor L6, an inductor L7, a transformer 2, a rectifier 2 and a rectifier 3; the input of the transformer 1 is connected with a power grid, the output of the transformer 1 is connected with an inductor L1, an inductor L2 and an inductor L3, the inductor L1, the inductor L2 and the inductor L3 are connected with the rectifier 1, the rectifier 1 is connected with an inverter through a smoothing reactor L4, an energy storage capacitor C1 and a resistor R1 are connected in parallel between a connecting pin of the smoothing reactor L4 and the inverter and a direct connecting pin of the inverter and the rectifier 1, the output of the inverter is connected with the input of the transformer 2 through the inductor L5, the inductor L6 and the inductor L7, the rectifier 2 and the rectifier 3 are connected to two outputs of the transformer 2 respectively, the rectifier 2 is connected with a load RL through a smoothing reactor L8, the rectifier 3 is connected with the load RL through a smoothing reactor L9, and the two ends of the load RL are connected in parallel with the energy storage capacitor C2.

2. The power supply device suitable for high-power and ultrahigh-power hydrogen production by water electrolysis as claimed in claim 1, wherein: the transformer 1 adopts a star-delta transformer.

3. The power supply device suitable for high-power and ultrahigh-power hydrogen production by water electrolysis as claimed in claim 1, wherein: rectifier 1 adopts many level rectifier, rectifier 1 adopts DSP + FPGA control platform and high accuracy periphery sampling conditioning circuit to control, rectifier 1 samples the three-phase voltage of electric wire netting and gives DSP and FPGA with the voltage current signal who samples and carries out rectification control.

4. The power supply device suitable for high-power and ultrahigh-power hydrogen production by water electrolysis as claimed in claim 1, wherein: the inverter is controlled by a DSP + CPLD control platform, the inverter carries out high-precision sampling on the direct current voltage and the current output by the rear-stage load side and provides the sampled data for the DSP to be processed, and then the modulation ratio of the alternating current voltage to be modulated to the current is calculated; the DSP adopts a vector control strategy to rapidly control a voltage loop and a current loop, the current loop is a rapid response loop and adopts a rapid loop control strategy, and the voltage loop response speed requirement is second to that of the current loop and adopts a slow loop control strategy; the inverter outputs a stable and controlled alternating current fitting voltage and supplies the stable and controlled alternating current fitting voltage to a transformer 2 at the later stage through an inductor L5, an inductor L6 and an inductor L7 for energy transmission; the inversion frequency of the inverter is controlled between 500Hz and 200 Hz.

5. The power supply device suitable for high-power and ultrahigh-power hydrogen production by water electrolysis as claimed in claim 1, wherein: the transformer 2 is an intermediate frequency transformer which supplies the converted voltage to the rectifier 2 and the rectifier 3 through a YYY type winding voltage conversion function.

6. The power supply device suitable for high-power and ultrahigh-power hydrogen production by water electrolysis as claimed in claim 1, wherein: the rectifier 2 and the rectifier 3 both adopt diode full-bridge rectifiers.