CN111245263A - High-transformation-ratio wide-input-range power electronic conversion topology - Google Patents
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 43
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 51
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 claims abstract description 38
- 230000009466 transformation Effects 0.000 claims abstract description 34
- 239000003990 capacitor Substances 0.000 claims abstract description 23
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- 238000005516 engineering process Methods 0.000 description 4
- 108010001267 Protein Subunits Proteins 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from DC input or output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
本发明属于电力电子技术领域，具体涉及了一种高变比宽输入范围电力电子变换拓扑，旨在解决现有技术高变比宽输入范围电力电子变换拓扑子模块数量多、结构复杂、无法直接连接电解槽的问题。本发明包括：三相不控整流桥将风能转化的交流电能转换为直流电源；电感模块将直流电源中残余交流电能滤除；子模块组用于进行电压变换得到低电压直流电源；滤波器用于进行低电压直流电源的纹波滤除，滤除纹波后的低电压指令电源直接连接电解槽进行离网制氢。本发明通过级联子单元直流电容分压、隔离DC‑DC高频变压器变比、输出并联三种方式结合实现高变比电压，模块数量少、结构简单，满足电解槽的低纹波输入要求，可直接连接电解槽，系统方便实现，性能稳定可靠。
The invention belongs to the technical field of power electronics, and in particular relates to a power electronic conversion topology with a high transformation ratio and a wide input range, and aims to solve the problem that the high transformation ratio and wide input range power electronic transformation topology in the prior art has a large number of sub-modules, a complex structure, and cannot be directly Problems connecting the electrolyser. The invention includes: a three-phase uncontrolled rectifier bridge converts AC power converted from wind energy into DC power; an inductance module filters out residual AC power in the DC power; a sub-module group is used for voltage conversion to obtain a low-voltage DC power; a filter is used for The ripple filtering of the low-voltage DC power supply is performed, and the low-voltage command power supply after filtering the ripple is directly connected to the electrolyzer for off-grid hydrogen production. The invention realizes high ratio voltage by combining three methods of cascading subunit DC capacitor voltage division, isolating DC-DC high-frequency transformer transformation ratio, and output parallel connection. , can be directly connected to the electrolytic cell, the system is easy to implement, and the performance is stable and reliable.
Description
技术领域technical field
本发明属于电力电子技术领域，具体涉及了一种高变比宽输入范围电力电子变换拓扑。The invention belongs to the technical field of power electronics, and particularly relates to a power electronic conversion topology with a high transformation ratio and a wide input range.
背景技术Background technique
氢能被视为21世纪最具发展潜力的清洁能源，并且已经在工业、交通、建筑供热等领域逐步推广，未来氢能在终端应用网络的大规模推广对规模化绿色制氢方式提出了新的挑战，可再生能源制氢被认为是未来主要的绿色氢气来源，且能够有效提升我国可再生能源利用率，例如风电制氢，对于解决风电就地消纳和发展分散式风力发电技术，实现可再生能源多途径高效利用具有重要意义，受到国内外广泛关注，风电制氢技术主要包括以下几种模式：(1)风电并网，将超出电网接纳能力的部分制氢；(2)风力发电为主，电网提供辅助的制氢系统；(3)风电制氢-燃料电池微网系统；(4)基于风电制氢的储能系统；(5)风电完全离网制氢[1]。Hydrogen energy is regarded as the clean energy with the most development potential in the 21st century, and has been gradually promoted in the fields of industry, transportation, and building heating. The large-scale promotion of hydrogen energy in the terminal application network in the future puts forward a large-scale green hydrogen production method New challenges, hydrogen production from renewable energy is considered to be the main source of green hydrogen in the future, and can effectively improve the utilization rate of renewable energy in my country, such as hydrogen production from wind power. It is of great significance to realize the efficient utilization of renewable energy in multiple ways, and it has received extensive attention at home and abroad. The wind power hydrogen production technology mainly includes the following modes: (1) wind power is connected to the grid, and the part of hydrogen that exceeds the capacity of the power grid will be produced; (2) wind power Mainly generate electricity, and the power grid provides auxiliary hydrogen production system; (3) wind power hydrogen production-fuel cell microgrid system; (4) wind power hydrogen production based energy storage system; (5) wind power completely off-grid hydrogen production [1].
离网制氢技术避免了交流电上网带来的相位差、频率差等问题，能够大量简化控制系统、删减并网所需的辅助设备、能够适配结构优化的低成本风力发电机，因此与并网制氢系统、或者电网取电电解水制氢相比成本显著降低。由于电解槽额定工作电压低、对电流纹波指标要求较高、对功率波动较为敏感等特性，对整个系统的电能变换环节提出了与并网完全不同得要求。随着风力发电机朝着大功率快速发展，非隔离型DC/DC变换器受到器件工作电压和工作电流范围制约，较难适用于MW级大功率应用场合。文献[2]的对比结果显示隔离型变压器较为适合风机制氢的高变比应用场合，但是为了保证模块化隔离型DC/DC工作在最优工作范围，通常需要保证前端电压稳定。因此其应用场合一般连接于稳定的直流母线，或者通过前置DC/DC，AC/DC变换器稳定其输入电压。例如文献[3]提出一种风电制氢拓扑方案，通过采用不控整流桥，显著降低系统成本，通过在隔离型DC/DC前置Buck电路，以增加电压/电流控制自由度。但是这种电路同样无法应用于大功率场合。The off-grid hydrogen production technology avoids the phase difference and frequency difference caused by the AC power grid, which can greatly simplify the control system, reduce the auxiliary equipment required for grid connection, and can adapt to low-cost wind turbines with optimized structure. Compared with the grid-connected hydrogen production system, or the power grid to take electricity and electrolyze water to produce hydrogen, the cost is significantly lower. Due to the low rated working voltage of the electrolytic cell, high requirements for current ripple index, and sensitivity to power fluctuations, completely different requirements from grid connection are put forward for the power conversion link of the entire system. With the rapid development of wind turbines towards high power, non-isolated DC/DC converters are limited by the range of device operating voltage and operating current, and are difficult to apply to MW-level high-power applications. The comparison results of literature [2] show that isolation transformers are more suitable for high transformation ratio applications of wind turbines, but in order to ensure that the modular isolation DC/DC works in the optimal working range, it is usually necessary to ensure that the front-end voltage is stable. Therefore, its application is generally connected to a stable DC bus, or through a pre-DC/DC, AC/DC converter to stabilize its input voltage. For example, literature [3] proposes a wind power hydrogen production topology scheme. By using an uncontrolled rectifier bridge, the system cost is significantly reduced, and the voltage/current control degree of freedom is increased by adding a Buck circuit in front of the isolated DC/DC. But this kind of circuit can't be applied to high-power occasions either.
模块化隔离型DC/DC串并联是高电压大功率场合一个较为成熟的方案，其中输入串联、输出并联型模块化隔离型DC/DC，具有可扩展型，高可靠性，低电流纹波等优点，且特别适用于大功率大变比降压场合，文献[4]对这种方案的均压、均流控制策略进行了研究，但是其同样需要与稳定的直流母线连接，以便于使整个系统工作在最优范围，例如让隔离型DC/DC的开关器件能够持续工作在软开关模式，而常用的永磁同步风机输出电压频率与幅值均随风速变化，通过不控整流后的直流电压也无法直接保持稳定，无法直接采用该类型DC/DC连接电解槽。文献[5]提出一种交流侧通过级联子单元组成，各级联子单元直流侧作为独立输入，输出并联型的AC-DC变换器，为高压交流到低压直流变流提出了一种新的思路，但是这种拓扑结构应用于三相交流电时，存在子模块数量将增加3倍的问题。Modular isolated DC/DC series-parallel is a relatively mature solution for high-voltage and high-power applications. The input series and output parallel modular isolated DC/DC are scalable, high reliability, low current ripple, etc. It is especially suitable for high-power and large-ratio buck applications. Literature [4] studies the voltage and current sharing control strategies of this scheme, but it also needs to be connected to a stable DC bus, so as to make the whole The system works in the optimal range, for example, the isolated DC/DC switching device can continue to work in the soft switching mode, while the output voltage frequency and amplitude of the commonly used permanent magnet synchronous fan change with the wind speed. The DC voltage also cannot be directly kept stable, and this type of DC/DC cannot be directly connected to the electrolyzer. Reference [5] proposes an AC-DC converter whose AC side is composed of cascaded subunits, and the DC side of each cascaded subunit is used as an independent input and outputs a parallel AC-DC converter. However, when this topology is applied to three-phase alternating current, there is a problem that the number of sub-modules will increase by 3 times.
以下文献是与本发明相关的技术背景资料：The following documents are technical background information related to the present invention:
[1]孙鹤旭、李争、陈爱兵、张岩、梅春晓，风电制氢技术现状及发展趋势[J]，中国电机工程学报，2019，34(19)：4071-4083.[1] Sun Hexu, Li Zheng, Chen Aibing, Zhang Yan, Mei Chunxiao, Current Situation and Development Trend of Wind Power Hydrogen Production Technology [J], Chinese Journal of Electrical Engineering, 2019, 34(19): 4071-4083.
[2]Damien Guilbert,Stefania Maria Collura,Angel Scipioni.DC/DCconverter topologies for electrolyzers:State-of-the-art and remaining keyissues[J].International Journal of Hydrogen Energy,2017,42:23966-23985.[2] Damien Guilbert, Stefania Maria Collura, Angel Scipioni. DC/DCconverter topologies for electrolyzers: State-of-the-art and remaining key issues[J]. International Journal of Hydrogen Energy, 2017, 42: 23966-23985.
[3]Stefania Maria Collura,Damien Guilbert,Gianpaolo Vitale etal.Design and experimental validation of a high voltage ratio DC/DC converterfor proton exchange membrane electrolyzer applications[J].InternationalJournal of Hydrogen Energy,2019,44:7059-7072.[3]Stefania Maria Collura,Damien Guilbert,Gianpaolo Vitale etal.Design and experimental validation of a high voltage ratio DC/DC converter for proton exchange membrane electrolyzer applications[J].InternationalJournal of Hydrogen Energy,2019,44:7059-7072.
[4]黄先进、赵鹃，一种基于输入串联输出并联移相全桥变换器的改进型交错控制方法研究[J]，电工技术学报，2019.[4] Huang Xianjin, Zhao Juan, Research on an improved interleaving control method based on an input series-output parallel phase-shift full-bridge converter [J], Chinese Journal of Electrotechnical Technology, 2019.
[5]武明义、侯聂、宋文胜、蒋威，独立输入并联输出全桥隔离DC-DC变换器直接功率平衡控制[J]，中国电机工程学报，2018，38(5)：1329-1337.[5] Wu Mingyi, Hou Nie, Song Wensheng, Jiang Wei, Direct Power Balance Control of Independent Input Parallel Output Full Bridge Isolated DC-DC Converter [J], Chinese Journal of Electrical Engineering, 2018, 38(5): 1329-1337.
发明内容SUMMARY OF THE INVENTION
为了解决现有技术中的上述问题，即现有风电离网制氢系统中高变比宽输入范围电力电子变换拓扑子模块数量多、结构复杂、无法直接连接电解槽的问题，本发明提供了一种高变比宽输入范围电力电子变换拓扑，该拓扑包括三相不控整流桥、电感模块、子模块组、滤波器；In order to solve the above-mentioned problems in the prior art, that is, the existing wind ionization grid hydrogen production system has a large number of power electronic conversion topology sub-modules with a high transformation ratio and a wide input range, the structure is complex, and the electrolyzer cannot be directly connected, the present invention provides a A power electronic conversion topology with high transformation ratio and wide input range, which includes a three-phase uncontrolled rectifier bridge, an inductance module, a sub-module group, and a filter;
所述三相不控整流桥用于接收基于风能转换获得的交流电能，并将所述交流电能转换为直流电源；The three-phase uncontrolled rectifier bridge is used for receiving AC power obtained based on wind energy conversion, and converting the AC power into DC power;
所述电感模块用于对所述三相不控整流桥发送的直流电源进行隔离及滤波，去除所述直流电源中的残余交流电能；The inductance module is used for isolating and filtering the DC power supply sent by the three-phase uncontrolled rectifier bridge to remove residual AC power in the DC power supply;
所述子模块组用于接收所述电感模块发送的隔离及滤波后的直流电源，并进行电压变换得到低电压直流电源；The sub-module group is used for receiving the isolated and filtered DC power supply sent by the inductance module, and performing voltage conversion to obtain a low-voltage DC power supply;
所述滤波器用于接收所述子模块组发送的低电压直流电源，进行纹波滤除后发送至制氢电解槽模块。The filter is used to receive the low-voltage DC power supply sent by the sub-module group, filter the ripple, and send it to the hydrogen production electrolyzer module.
在一些优选的实施例中，所述三相不控整流桥交流输入侧与风机输出侧相连，直流输出侧的正直流母线与所述电感一端相连，直流输出侧的负直流母线与所述子模块组负输入端相连；In some preferred embodiments, the AC input side of the three-phase uncontrolled rectifier bridge is connected to the fan output side, the positive DC bus of the DC output side is connected to one end of the inductor, and the negative DC bus of the DC output side is connected to the The negative input terminal of the module group is connected;
所述电感另一端与所述子模块组正输入端相连；The other end of the inductor is connected to the positive input end of the sub-module group;
所述子模块组正输出端与所述滤波器正输入端相连，所述子模块组负输出端与所述滤波器负输入端相连；The positive output end of the sub-module group is connected with the positive input end of the filter, and the negative output end of the sub-module group is connected with the negative input end of the filter;
所述滤波器正输出端与制氢电解槽模块正输入端相连，所述滤波器负输出端与制氢电解槽模块负输入端相连。The positive output end of the filter is connected with the positive input end of the hydrogen production electrolyzer module, and the negative output end of the filter is connected with the negative input end of the hydrogen production electrolytic cell module.
在一些优选的实施例中，所述子模块组包括n个子模块；In some preferred embodiments, the sub-module group includes n sub-modules;
所述n个子模块在输入端串联；所述n个子模块中第1个子模块第一输入端作为所述子模块组的正输入端，第n个子模块第二输入端作为所述子模块组的负输入端，第n个子模块第一输入端与第n-1个子模块第二输入端相连；The n sub-modules are connected in series at the input terminals; the first input terminal of the first sub-module in the n sub-modules is used as the positive input terminal of the sub-module group, and the second input terminal of the n-th sub-module is used as the sub-module group. Negative input terminal, the first input terminal of the nth submodule is connected to the second input terminal of the n-1th submodule;
所述n个子模块在输出端并联；所述n个子模块中每一个子模块第一输出端连接到一起作为所述子模块组的正输出端，所述n个子模块中每一个子模块第二输出端连接到一起作为所述子模块组的负输出端。The n sub-modules are connected in parallel at the output terminals; the first output terminals of each sub-module in the n sub-modules are connected together as the positive output terminal of the sub-module group, and the second sub-module in each of the n sub-modules is connected together. The outputs are connected together as negative outputs of the sub-module group.
在一些优选的实施例中，所述子模块包括半桥子单元、隔离DC-DC；In some preferred embodiments, the sub-module includes a half-bridge sub-unit, isolated DC-DC;
所述半桥子单元第一输入端作为所述子模块第一输入端，第二输入端作为所述子模块第二输入端，第一输出端与所述隔离DC-DC输入侧正极相连，第二输出端与所述隔离DC-DC输入侧负极相连；The first input terminal of the half-bridge sub-unit is used as the first input terminal of the sub-module, the second input terminal is used as the second input terminal of the sub-module, and the first output terminal is connected to the positive pole of the isolated DC-DC input side, The second output terminal is connected to the negative pole of the isolated DC-DC input side;
所述隔离DC-DC输出侧正极作为所述子模块第一输出端，负极作为所述子模块第二输出端。The positive pole of the isolated DC-DC output side is used as the first output terminal of the sub-module, and the negative pole is used as the second output terminal of the sub-module.
在一些优选的实施例中，所述半桥子单元包括第一电容、第二电容、二极管、全控器件；In some preferred embodiments, the half-bridge subunit includes a first capacitor, a second capacitor, a diode, and a fully controlled device;
所述第一电容正极与所述二极管阴极相连，作为所述半桥子单元直流母线正极，负极与所述第二电容正极相连；The anode of the first capacitor is connected to the cathode of the diode, serving as the anode of the DC bus of the half-bridge subunit, and the cathode is connected to the anode of the second capacitor;
所述第二电容负极与所述全控器件的发射极相连，作为所述半桥子单元的第二输入端以及半桥子单元直流母线负极；The second capacitor cathode is connected to the emitter of the full control device, and serves as the second input terminal of the half-bridge subunit and the negative electrode of the DC bus of the half-bridge subunit;
所述全控器件的集电极与所述二级管阳极相连，作为所述半桥子单元的第一输入端。The collector of the full control device is connected to the anode of the diode and serves as the first input end of the half-bridge subunit.
在一些优选的实施例中，所述隔离DC-DC包括逆变结构、变压器、不控整流桥；In some preferred embodiments, the isolated DC-DC includes an inverter structure, a transformer, and an uncontrolled rectifier bridge;
所述逆变结构第一输出端与所述变压器输入侧正极相连，第二输出端与所述变压器输入侧负极相连；The first output terminal of the inverter structure is connected to the positive pole of the input side of the transformer, and the second output terminal is connected to the negative pole of the input side of the transformer;
所述变压器输出侧正极与所述不控整流桥第一输入端相连，输出侧负极与所述不控整流桥第二输入端相连；The positive pole of the output side of the transformer is connected to the first input terminal of the uncontrolled rectifier bridge, and the negative pole of the output side is connected to the second input terminal of the uncontrolled rectifier bridge;
所述逆变结构直流侧正极与负极作为隔离DC-DC的两个输入端，所述不控整流桥直流侧正极与负极作为隔离DC-DC的两个输出端。The positive pole and negative pole of the DC side of the inverter structure are used as two input terminals for isolating DC-DC, and the positive pole and negative pole of the DC side of the uncontrolled rectifier bridge are used as two output terminals for isolating DC-DC.
本发明的另一方面，提出了一种风电离网制氢系统，基于上述的高变比宽输入范围电力电子变换拓扑，该系统包括永磁风机、高变比宽输入范围电力电子变换拓扑、制氢电解槽模块；In another aspect of the present invention, a wind ionization off-grid hydrogen production system is proposed. Based on the above-mentioned high-transformation ratio and wide-input range power electronic conversion topology, the system includes a permanent magnet fan, a high-transformation ratio and wide input range power electronic conversion topology, Hydrogen production electrolyzer module;
所述永磁风机用于将风能转换为交流电能，并发送至所述高变比宽输入范围电力电子变换拓扑；The permanent magnet fan is used for converting wind energy into alternating current electrical energy and sending it to the power electronic conversion topology with high transformation ratio and wide input range;
所述高变比宽输入范围电力电子变换拓扑用于基于所述交流电能获取纹波滤除后的低电压直流电源，并发送至所述制氢电解槽模块；The high transformation ratio and wide input range power electronic conversion topology is used to obtain low-voltage DC power after ripple filtering based on the AC power, and send it to the hydrogen production electrolyzer module;
所述制氢电解槽模块用于接收所述纹波滤除后的低电压直流电源，并进行风电离网制氢。The hydrogen production electrolyzer module is used for receiving the low-voltage DC power supply after the ripples are filtered, and for producing hydrogen from the wind ionization grid.
在一些优选的实施例中，所述永磁风机为永磁同步风机。In some preferred embodiments, the permanent magnet fan is a permanent magnet synchronous fan.
本发明的有益效果：Beneficial effects of the present invention:
(1)本发明高变比宽输入范围电力电子变换拓扑，通过级联子单元直流电容分压、隔离DC-DC高频变压器变比、输出并联三种方式结合实现高变比电压，可通过对多个隔离DC-DC的采取交错控制，采用输出纹波抵消的方法实现电感电流低纹波效应，模块数量少、结构简单，满足电解槽的低纹波输入要求，可直接连接电解槽。(1) The power electronic conversion topology with high transformation ratio and wide input range of the present invention realizes high transformation ratio voltage by combining three methods of cascading subunit DC capacitor voltage division, isolating DC-DC high frequency transformer transformation ratio, and output parallel connection. Interleaved control is adopted for multiple isolated DC-DCs, and the method of output ripple cancellation is adopted to realize the low ripple effect of inductor current. The number of modules is small and the structure is simple, which meets the low ripple input requirements of the electrolytic cell, and can be directly connected to the electrolytic cell.
(2)本发明高变比宽输入范围电力电子变换拓扑，全控器件数量少，降低系统成本，采用模块化结构，便于实现冗余配置，提高系统可靠性，同时，本发明拓扑中采用的均为低压常规部件，拓扑结构简单、方便实现，可靠性高。(2) The power electronic conversion topology with high transformation ratio and wide input range of the present invention has few full control devices, reduces system cost, adopts modular structure, is convenient to realize redundant configuration, and improves system reliability. All are low-voltage conventional components, with simple topology, easy implementation and high reliability.
附图说明Description of drawings
通过阅读参照以下附图所作的对非限制性实施例所作的详细描述，本申请的其它特征、目的和优点将会变得更明显：Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:
图1是本发明高变比宽输入范围电力电子变换拓扑的结构示意图；Fig. 1 is the structural representation of the power electronic conversion topology with high transformation ratio and wide input range of the present invention;
图2是本发明高变比宽输入范围电力电子变换拓扑一种实施例的子模块组构成示意图；FIG. 2 is a schematic diagram of the composition of a sub-module group of an embodiment of a high-transformation ratio wide-input range power electronic conversion topology according to the present invention;
图3是本发明高变比宽输入范围电力电子变换拓扑一种实施例的子模块结构示意图；3 is a schematic structural diagram of a sub-module of an embodiment of a power electronic conversion topology with a high transformation ratio and a wide input range of the present invention;
图4是本发明高变比宽输入范围电力电子变换拓扑一种实施例的半桥子单元与隔离DC-DC结构示意图。FIG. 4 is a schematic diagram of a half-bridge sub-unit and an isolated DC-DC structure according to an embodiment of a power electronic conversion topology with a high transformation ratio and a wide input range of the present invention.
具体实施方式Detailed ways
下面结合附图和实施例对本申请作进一步的详细说明。可以理解的是，此处所描述的具体实施例仅用于解释相关发明，而非对该发明的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与有关发明相关的部分。The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the related invention, but not to limit the invention. In addition, it should be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
本发明的一种高变比宽输入范围电力电子变换拓扑，该拓扑包括三相不控整流桥、电感模块、子模块组、滤波器；A power electronic conversion topology with high transformation ratio and wide input range of the present invention includes a three-phase uncontrolled rectifier bridge, an inductance module, a sub-module group, and a filter;
所述三相不控整流桥用于接收基于风能转换获得的交流电能，并将所述交流电能转换为直流电源；The three-phase uncontrolled rectifier bridge is used for receiving AC power obtained based on wind energy conversion, and converting the AC power into DC power;
所述电感模块用于对所述三相不控整流桥发送的直流电源进行隔离及滤波，去除所述直流电源中的残余交流电能；The inductance module is used for isolating and filtering the DC power supply sent by the three-phase uncontrolled rectifier bridge to remove residual AC power in the DC power supply;
所述子模块组用于接收所述电感模块发送的隔离及滤波后的直流电源，并进行电压变换得到低电压直流电源；The sub-module group is used for receiving the isolated and filtered DC power supply sent by the inductance module, and performing voltage conversion to obtain a low-voltage DC power supply;
所述滤波器用于接收所述子模块组发送的低电压直流电源，进行纹波滤除后发送至制氢电解槽模块。The filter is used to receive the low-voltage DC power supply sent by the sub-module group, filter the ripple, and send it to the hydrogen production electrolyzer module.
为了更清晰地对本发明高变比宽输入范围电力电子变换拓扑进行说明，下面结合图1对本发明实施例中各模块展开详述。In order to more clearly describe the power electronic conversion topology with high transformation ratio and wide input range of the present invention, each module in the embodiment of the present invention will be described in detail below with reference to FIG. 1 .
本发明一种实施例的高变比宽输入范围电力电子变换拓扑，包括三相不控整流桥、电感模块、子模块组、滤波器，各模块详细描述如下：A power electronic conversion topology with high transformation ratio and wide input range according to an embodiment of the present invention includes a three-phase uncontrolled rectifier bridge, an inductance module, a sub-module group, and a filter. The detailed description of each module is as follows:
三相不控整流桥用于接收基于风能转换获得的交流电能，并将交流电能转换为直流电源。三相不控整流桥交流输入侧与风机输出侧相连，直流输出侧的正直流母线与电感一端相连，直流输出侧的负直流母线与子模块组负输入端相连。The three-phase uncontrolled rectifier bridge is used to receive the AC power obtained based on wind energy conversion, and convert the AC power to DC power. The AC input side of the three-phase uncontrolled rectifier bridge is connected to the fan output side, the positive DC busbar of the DC output side is connected to one end of the inductor, and the negative DC busbar of the DC output side is connected to the negative input end of the sub-module group.
不控整流桥只需要几只晶闸管和触发电路，无需宽脉冲或双脉冲触发，线路简单经济、调整方便，其输出电压不可控，仅由电网电压决定，多用在中等容量或不要求可逆拖动的电力装置中。The uncontrolled rectifier bridge only needs a few thyristors and trigger circuits, no need for wide pulse or double pulse triggering, the circuit is simple and economical, and the adjustment is convenient. in the electrical installation.
电感模块用于对三相不控整流桥发送的直流电源进行隔离及滤波，去除直流电源中的残余交流电能。电感一端与三相不控整流桥直流输出侧的正直流母线相连，另一端与子模块组正输入端相连。The inductance module is used to isolate and filter the DC power supply sent by the three-phase uncontrolled rectifier bridge to remove the residual AC power in the DC power supply. One end of the inductor is connected to the positive DC bus on the DC output side of the three-phase uncontrolled rectifier bridge, and the other end is connected to the positive input end of the sub-module group.
子模块组用于接收电感模块发送的隔离及滤波后的直流电源，并进行电压变换得到低电压直流电源。子模块组正输出端与滤波器正输入端相连，负输出端与滤波器负输入端相连，正输入端与电感相连，负输入端与三相不控整流桥直流输出侧的负直流母线相连。The sub-module group is used to receive the isolated and filtered DC power supply sent by the inductance module, and perform voltage conversion to obtain a low-voltage DC power supply. The positive output terminal of the sub-module group is connected to the positive input terminal of the filter, the negative output terminal is connected to the negative input terminal of the filter, the positive input terminal is connected to the inductor, and the negative input terminal is connected to the negative DC bus of the DC output side of the three-phase uncontrolled rectifier bridge. .
滤波器用于接收子模块组发送的低电压直流电源，进行纹波滤除后发送至制氢电解槽模块。滤波器正输出端与制氢电解槽模块正输入端相连，负输出端与制氢电解槽模块负输入端相连。The filter is used to receive the low-voltage DC power sent by the sub-module group, filter the ripple and send it to the hydrogen production electrolyzer module. The positive output end of the filter is connected with the positive input end of the hydrogen-producing electrolyzer module, and the negative output end is connected with the negative input end of the hydrogen-producing electrolyzer module.
风机6输出侧与三相不控整流桥1交流输入侧连接，三相不控整流桥直流输出侧的正直流母线11与电感一侧13连接，电感另一侧14与子模块组的第一输入端15连接，三相不控整流桥直流输出侧的负直流母线12与子模块组的第二输入端16连接。子模块组的第一输出端17与滤波器的第一输入端19连接，子模块组的第二输出端18与滤波器的第二输入端20连接，滤波器的第一输出端21与制氢电解槽模块的第一输入端23连接，滤波器的第二输出端22与制氢电解槽模块的第二输入端24连接。The output side of the fan 6 is connected to the AC input side of the three-phase
子模块组包括n个子模块；The submodule group includes n submodules;
n个子模块在输入端串联；n个子模块中第1个子模块第一输入端作为子模块组的正输入端，第n个子模块第二输入端作为子模块组的负输入端，第n个子模块第一输入端与第n-1个子模块第二输入端相连；n submodules are connected in series at the input terminals; among the n submodules, the first input terminal of the first submodule is used as the positive input terminal of the submodule group, the second input terminal of the nth submodule is used as the negative input terminal of the submodule group, and the nth submodule is used as the negative input terminal of the submodule group. The first input terminal is connected to the second input terminal of the n-1th submodule;
n个子模块在输出端并联；n个子模块中每一个子模块第一输出端连接到一起作为子模块组的正输出端，n个子模块中每一个子模块第二输出端连接到一起作为子模块组的负输出端。n sub-modules are connected in parallel at the output terminals; the first output terminals of each sub-module in the n sub-modules are connected together as a positive output terminal of the sub-module group, and the second output terminals of each sub-module in the n sub-modules are connected together as a sub-module Negative output of the group.
如图2所示，为本发明高变比宽输入范围电力电子变换拓扑一种实施例的子模块组构成示意图，包括n个子模块：子模块1第一输入端21作为子模块组的第一输入端，子模块1第二输入端22与子模块2第一输入端23连接，以此类推，子模块n-1第二输入端25与子模块n第一输入端26连接，子模块n第二输入端27作为子模块组的第二输入端。子模块1到子模块n的第一输出端连接在一起作为子模块组的第一输出端，子模块1到子模块n的第二输出端连接在一起作为子模块组的第二输出端。As shown in FIG. 2, it is a schematic diagram of the structure of a sub-module group according to an embodiment of a high-transformation ratio and wide-input range power electronic conversion topology according to the present invention, including n sub-modules: the
子模块包括半桥子单元、隔离DC-DC；Sub-modules include half-bridge sub-units, isolated DC-DC;
半桥子单元第一输入端作为子模块第一输入端，第二输入端作为子模块第二输入端，第一输出端与隔离DC-DC输入侧正极相连，第二输出端与隔离DC-DC输入侧负极相连；The first input terminal of the half-bridge subunit is used as the first input terminal of the sub-module, the second input terminal is used as the second input terminal of the sub-module, the first output terminal is connected to the positive pole of the isolated DC-DC input side, and the second output terminal is connected to the isolated DC-DC input side. The negative pole of the DC input side is connected;
隔离DC-DC输出侧正极作为子模块第一输出端，负极作为子模块第二输出端。The positive pole of the isolated DC-DC output side is used as the first output terminal of the sub-module, and the negative pole is used as the second output terminal of the sub-module.
如图3所示，为本发明高变比宽输入范围电力电子变换拓扑一种实施例的子模块结构示意图，包括半桥子单元、隔离DC-DC：半桥子单元的第一输入端41作为子模块第一输入端，半桥子单元的第二输入端42作为子模块第二输入端；半桥子单元的直流母线正极(第一输出端)43连接隔离DC-DC输入侧正极45，半桥子单元的直流母线负极(第二输出端)44连接隔离DC-DC输入侧负极46；隔离DC-DC输出侧正极47作为子模块的第一输出端，隔离DC-DC输出侧负极48作为子模块的第二输出端。As shown in FIG. 3 , it is a schematic structural diagram of a sub-module of an embodiment of a power electronic conversion topology with a high transformation ratio and a wide input range of the present invention, including a half-bridge sub-unit, an isolated DC-DC: the
半桥子单元包括第一电容、第二电容、二极管、全控器件；The half-bridge subunit includes a first capacitor, a second capacitor, a diode, and a full control device;
第一电容正极与二极管阴极相连，作为半桥子单元直流母线正极，负极与第二电容正极相连；The anode of the first capacitor is connected to the cathode of the diode, serving as the anode of the DC bus of the half-bridge subunit, and the cathode is connected to the anode of the second capacitor;
第二电容负极与全控器件的发射极相连，作为半桥子单元的第二输入端以及半桥子单元直流母线负极；The negative electrode of the second capacitor is connected to the emitter of the full control device, and serves as the second input terminal of the half-bridge subunit and the negative electrode of the DC bus of the half-bridge subunit;
全控器件的集电极与二级管阳极相连，作为半桥子单元的第一输入端。The collector of the full-control device is connected to the anode of the diode as the first input terminal of the half-bridge subunit.
隔离DC-DC包括逆变结构、变压器、不控整流桥；Isolated DC-DC includes inverter structure, transformer, and uncontrolled rectifier bridge;
逆变结构第一输出端与所述变压器输入侧正极相连，第二输出端与变压器输入侧负极相连；The first output end of the inverter structure is connected to the positive pole of the input side of the transformer, and the second output end is connected to the negative pole of the input side of the transformer;
变压器输出侧正极与所述不控整流桥第一输入端相连，输出侧负极与所述不控整流桥第二输入端相连；The positive pole of the output side of the transformer is connected to the first input terminal of the uncontrolled rectifier bridge, and the negative pole of the output side is connected to the second input terminal of the uncontrolled rectifier bridge;
逆变结构直流侧正极与负极作为隔离DC-DC的两个输入端，所述不控整流桥直流侧正极与负极作为隔离DC-DC的两个输出端。The positive pole and negative pole of the DC side of the inverter structure are used as two input terminals for isolating DC-DC, and the positive pole and negative pole of the DC side of the uncontrolled rectifier bridge are used as two output terminals for isolating DC-DC.
半桥子单元、隔离DC-DC可由多种形式组成，如图4所示，为本发明高变比宽输入范围电力电子变换拓扑一种实施例的半桥子单元与隔离DC-DC结构示意图。半桥子单元包括：包括第一电容51、第二电容52、二极管53、全控器件54，第一电容的正极与二极管阴极连接为半桥子单元直流母线的正极，第一电容的负极与第二电容的正极连接，第二电容的负极与全控器件的发射极连接作为半桥子单元的第二输入端，且为半桥子单元直流母线负极，全控器件的集电极与二极管阳极连接作为半桥子单元的第一输入端。隔离DC-DC包括：逆变结构59、变压器57、不控整流桥58，逆变结构的直流侧正极负极作为隔离DC-DC的两个输入端，逆变结构的交流侧与变压器输入端连接，变压器输出端与单相不控整流桥交流侧连接，单相不控整流桥的直流侧正极负极作为隔离DC-DC的输出端。The half-bridge subunit and the isolated DC-DC can be composed of various forms, as shown in FIG. 4 , which is a schematic diagram of the structure of the half-bridge subunit and the isolated DC-DC according to an embodiment of the power electronic conversion topology with high transformation ratio and wide input range of the present invention. . The half-bridge subunit includes: a first capacitor 51, a second capacitor 52, a
需要说明的是，上述实施例提供的高变比宽输入范围电力电子变换拓扑，仅以上述各功能模块的划分进行举例说明，在实际应用中，可以根据需要而将上述功能分配由不同的功能模块来完成，即将本发明实施例中的模块再分解或者组合，例如，上述实施例的模块可以合并为一个模块，也可以进一步拆分成多个子模块，以完成以上描述的全部或者部分功能。对于本发明实施例中涉及的模块的名称，仅仅是为了区分各个模块，不视为对本发明的不当限定。It should be noted that the power electronic conversion topology with high transformation ratio and wide input range provided by the above embodiments is only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functions Modules are implemented, that is, the modules in the embodiments of the present invention are decomposed or combined. For example, the modules in the above embodiments can be combined into one module, or can be further split into multiple sub-modules to complete all or part of the functions described above. The names of the modules involved in the embodiments of the present invention are only for distinguishing each module, and are not regarded as improper limitations of the present invention.
本发明第二实施例的风电离网制氢系统，基于上述的高变比宽输入范围电力电子变换拓扑，该系统包括永磁风机、高变比宽输入范围电力电子变换拓扑、制氢电解槽模块；The wind ionization grid hydrogen production system according to the second embodiment of the present invention is based on the above-mentioned high transformation ratio and wide input range power electronic conversion topology. module;
永磁风机用于将风能转换为交流电能，并发送至高变比宽输入范围电力电子变换拓扑；其中，永磁风机为永磁同步风机。The permanent magnet fan is used to convert wind energy into alternating current electric energy and send it to the power electronic conversion topology with high transformation ratio and wide input range; among them, the permanent magnet fan is a permanent magnet synchronous fan.
高变比宽输入范围电力电子变换拓扑用于基于交流电能获取设定频率的直流电源，并发送至制氢电解槽模块；Power electronic conversion topology with high transformation ratio and wide input range is used to obtain DC power with a set frequency based on AC power and send it to the hydrogen production electrolyzer module;
制氢电解槽模块用于接收设定频率的直流电源，并进行风电离网制氢。The hydrogen production electrolyzer module is used to receive the DC power supply of the set frequency and carry out the wind ionization off-grid hydrogen production.
风电离网制氢是一种与风电并网或者部分并网部分制氢完全不同的技术路径，生产的氢气能够供给工业、交通、等不同领域用途。离网制氢技术避免了交流电上网带来的相位差、频率差等问题，因此能够大量简化控制系统、删减并网所需的辅助设备、能够适配结构优化的低成本风力发电机，因此与并网制氢系统、或者电网取电电解水制氢相比成本显著降低。Off-grid hydrogen production from wind power is a completely different technical path from wind power grid-connected or partial grid-connected hydrogen production. The hydrogen produced can be used in different fields such as industry, transportation, and so on. The off-grid hydrogen production technology avoids the phase difference and frequency difference caused by the AC power grid, so it can greatly simplify the control system, reduce the auxiliary equipment required for grid connection, and can adapt to low-cost wind turbines with optimized structure. Compared with the grid-connected hydrogen production system, or the power grid to take electricity and electrolyze water to produce hydrogen, the cost is significantly reduced.
术语“第一”、“第二”等是用于区别类似的对象，而不是用于描述或表示特定的顺序或先后次序。The terms "first," "second," etc. are used to distinguish between similar objects, and are not used to describe or indicate a particular order or sequence.
术语“包括”或者任何其它类似用语旨在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备/装置不仅包括那些要素，而且还包括没有明确列出的其它要素，或者还包括这些过程、方法、物品或者设备/装置所固有的要素。The term "comprising" or any other similar term is intended to encompass a non-exclusive inclusion such that a process, method, article or device/means comprising a list of elements includes not only those elements but also other elements not expressly listed, or Also included are elements inherent to these processes, methods, articles or devices/devices.
至此，已经结合附图所示的优选实施方式描述了本发明的技术方案，但是，本领域技术人员容易理解的是，本发明的保护范围显然不局限于这些具体实施方式。在不偏离本发明的原理的前提下，本领域技术人员可以对相关技术特征作出等同的更改或替换，这些更改或替换之后的技术方案都将落入本发明的保护范围之内。So far, the technical solutions of the present invention have been described with reference to the preferred embodiments shown in the accompanying drawings, however, those skilled in the art can easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
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