CN220401614U - Power supply and distribution device applied to green ammonia device - Google Patents
Power supply and distribution device applied to green ammonia device Download PDFInfo
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- CN220401614U CN220401614U CN202321982588.6U CN202321982588U CN220401614U CN 220401614 U CN220401614 U CN 220401614U CN 202321982588 U CN202321982588 U CN 202321982588U CN 220401614 U CN220401614 U CN 220401614U
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 22
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 241000425037 Toona sinensis Species 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012084 conversion product Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Abstract
The utility model discloses a low-voltage power supply and distribution device applied to a green ammonia device, which comprises a three-phase bridge rectifier, a PWM single-phase inverter, a storage battery and a power controller, wherein the input end of the three-phase bridge rectifier is connected with a three-phase alternating-current power supply, the output end of the three-phase bridge rectifier is divided into two paths, one path of the three-phase bridge rectifier is connected with the PWM single-phase inverter, the other path of the three-phase bridge rectifier is connected with the power controller, the PWM single-phase inverter outputs 220V/50HZ single-phase power supply, the power controller outputs controllable direct-current power supply, the storage battery is arranged at the output end of the three-phase bridge rectifier, and the output end of the storage battery is respectively connected with the input ends of the PWM single-phase inverter and the power controller. According to the utility model, matched modules are selected according to the difference of input three-phase power supplies, and four functions of 220V/50HZ single-phase power supply output, controllable direct-current power supply output, redundant power supply and emergency power supply can be realized.
Description
Technical Field
The utility model relates to a low-voltage power supply and distribution device applied to a green ammonia device, and belongs to the technical field of power supply and distribution.
Background
In the field of industrial electricity, the parameters such as voltage and frequency of industrial electricity (three-phase electricity) in various countries in the world have certain differences, such as 400V/60HZ in Sade Arabic, 440V/60HZ in south America, 480V/60HZ in North America and the like. Because the 380V/50HZ power supply is commonly used in China, the rated power supply requirement of corresponding single-phase low-voltage electric equipment is generally 220V/50HZ, and if the single-phase low-voltage electric equipment is purchased in China, the power supply of the green ammonia device construction land is different from that of the domestic power supply, the power supply problem of the equipment is often brought. The conventional solution is that a single-phase power supply is lapped at a three-phase power supply point nearby, and the scheme can operate in a short time, but the provided non-rated parameter power supply can cause the effects of large impedance interference, accelerated precision attenuation, reduced service life and the like when being used for a long time.
Currently, in the construction process of a complete distributed green ammonia device, single-phase low-voltage electric equipment has the characteristics of small single power, large quantity, wide distribution, large influence and the like. When the domestic contractor builds the green ammonia device abroad, the problem that the power supply requirement of the domestic purchased single-phase low-voltage electric equipment cannot be completely matched with the power supply of the project construction land is often encountered, and two common solutions are adopted:
1. the three-phase power supply is lapped nearby, 380VAC three-phase power supply is output through a three-phase transformer, and then the single-phase power supply (220 VAC) is connected to electric equipment; as shown in FIG. 5
2. The single-phase power supply is lapped nearby, 220VAC single-phase power supply is output through a single-phase transformer, and then the single-phase power supply is connected to electric equipment; as in fig. 6.
Although the two schemes can meet the requirements of the power supply voltage of the equipment, two problems are brought about: firstly, unbalance among power supply phases can be caused; and secondly, when the power frequency is not matched with the equipment, the power frequency cannot be adjusted.
In addition, some key equipment in the green ammonia device usually adopts direct current power supply, and at present, all the equipment is commonly used and is provided with independent rectification power supply matched with the equipment, and the inconsistent capacity and non-uniform type selection of the independent rectification power supply lead to difficulty in realizing redundant power supply and emergency power supply functions, and the efficiency is lower in the operation process.
Disclosure of Invention
The utility model aims to provide a low-voltage power supply and distribution device applied to a green ammonia device, so as to overcome the problems in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a be applied to green ammonia device's low pressure power supply distribution unit, it includes three-phase bridge rectifier, single-phase dc-to-ac converter of PWM, storage battery and power supply controller, three-phase bridge rectifier's input is connected three-phase ac power supply, and the output is divided into two-way, and one of them is connected the single-phase dc-to-ac converter of PWM, another is connected power supply controller, the single-phase dc-to-ac converter of PWM outputs 220V/50HZ single-phase power supply, the controllable DC power supply of power supply controller output, storage battery sets up at three-phase bridge rectifier's delivery outlet end, and the delivery outlet end of storage battery connects the single-phase dc-to-ac converter of PWM and power supply controller's input respectively.
As a further preferable mode of the scheme, the three-phase bridge rectifier, the PWM single-phase inverter and the storage battery are all provided with two sets, and the two sets have the same circuit structure and are connected in parallel.
As a further preferred aspect of the present utility model, the PWM single-phase inverter is provided with a PWM regulator for changing the on-off time of the inverter switching device and thus the pulse width, the input of which is connected to the signal wave Ur and the carrier wave Uc, and the output of which is connected to the four semiconductor modules of the PWM single-phase inverter, respectively.
As a still further preferred aspect, the PWM regulator employs PWM switching regulators SG3524/SG3525.
As a further preferable aspect of the present utility model, the PWM single-phase inverter is an NTS series sine wave inverter.
As a further preferable aspect of the present utility model, the power supply controller uses an SHD series IGBT dc converter.
Compared with the prior art, the utility model has the beneficial effects that: the power distribution device is adopted in the green ammonia project, and matched modules are selected according to the difference of input three-phase power supplies, so that four functions of 220V/50HZ single-phase power supply output, controllable direct-current power supply output, redundant power supply and emergency power supply can be realized. Specific:
(1) Converting an input three-phase power supply into a 220V/50HZ single-phase power supply for output through the configuration of a rectifier and an inverter;
(2) The controllable direct-current power supply output is realized by arranging a direct-current bypass and a power supply controller;
(3) The redundant power supply function is realized through parallel connection of the two sets of devices;
(4) Through setting up battery cell, three business turn over single play UPS has been constituteed, emergency power source function has been realized.
In summary, the device can be applied to:
(a) How to provide 220V/50HZ single-phase power supply in different power supply environments, which is used for the power distribution of single-phase low-voltage electric equipment such as instruments, executing mechanisms, control, illumination, fire alarm and the like;
(b) According to the condition that direct current electric equipment exists in the green ammonia device, a stable and controllable direct current power supply is provided through the device;
(c) The reliability of power supply of key equipment of the green ammonia device is improved.
Drawings
FIG. 1 is a schematic diagram of a trimming circuit of the present utility model;
FIG. 2 is a schematic circuit diagram of a three-phase bridge rectifier of the present utility model;
FIG. 3 is a schematic diagram of an exemplary PWM single-phase inverter of the present utility model;
FIG. 4 is a unipolar PWM control schematic of the present utility model;
FIG. 5 is a schematic diagram of a three-phase AC power input, 380V three-phase AC power output;
fig. 6 is a schematic diagram of a single-phase ac power input, 220V single-phase ac power output.
Marked in the figure as: 1. three-phase alternating current power supply input; 2. a three-phase bridge rectifier; 3. a battery pack; 4. a PWM single-phase inverter; 5. a power supply controller; 6. a controllable direct current power supply output; 7. 220V/50HZ single-phase power supply output; 8. three-phase alternating current power supply input; 9. outputting a three-phase alternating current power supply; 10. single-phase alternating current power supply input; 11. 220V single-phase alternating current power supply.
Detailed Description
The utility model will now be described in detail with reference to the drawings and specific examples.
Referring to fig. 1, the power supply and distribution device for a low-voltage power supply of a green ammonia device comprises a three-phase bridge rectifier, a PWM single-phase inverter, a storage battery and a power supply controller, wherein the input end of the three-phase bridge rectifier is connected with a three-phase ac power supply, the output end of the three-phase bridge rectifier is divided into two paths, one path of the three-phase bridge rectifier is connected with the PWM single-phase inverter, the other path of the three-phase bridge rectifier is connected with the power supply controller, the PWM single-phase inverter outputs 220V/50HZ single-phase power supply, the power supply controller outputs controllable direct-current power supply, the storage battery is arranged at the output end of the three-phase bridge rectifier, and the output end of the storage battery is respectively connected with the input ends of the PWM single-phase inverter and the power supply controller.
The three-phase bridge rectifier, the PWM single-phase inverter and the storage battery are all provided with two sets, and the two sets of circuits have the same structure and are connected in parallel.
The principle of the power supply and distribution device of the utility model is described as follows:
1. the device converts an input three-phase power supply into a 220V/50HZ single-phase power supply for output through the configuration of a three-phase bridge rectifier and a PWM single-phase inverter. The specific process comprises two steps, and the detailed description is as follows:
1. the three-phase power is converted to direct current. The rectifier has the function of converting ac into dc, and the three-phase bridge rectifier can convert three-phase ac into dc, see the typical diagram of the three-phase bridge rectifier in fig. 2, and the working principle and process of the three-phase bridge rectifier will not be described herein as a mature technology. The rectifier function is realized mainly by an internal thyristor/diode module, and the peak voltage V of the applicable thyristor/diode module is selected according to three-phase alternating current power sources in different areas RRM /V DRM And on-average current IT (AV)M The requirements of accessing different three-phase power supplies can be met. The method comprises the following steps:
a) Selecting peak voltage V based on supply voltage RRM /V DRM In general V RRM /V DRM A thyristor/diode module V commonly used for about 3 times of the power supply voltage RRM /V DRM The range is wider, and the requirements of three-phase power supply voltages in different areas, such as SKKH series of SEMIPACK company and MCD series of IXYS company, V RRM /V DRM Is selectable within 1.2 KV to 1.8 KV; the whole MFC series of the Shanghai Chinese toon is selectable at 0.4 KV to 2.6 KV;
b) Calculating the required power supply current according to the power of the electric equipment, and determining the thyristor/diode module IT by the power supply current (AV)M Normally thyristor/diode module IT (AV)M The current selection range is also larger, and the relevant manufacturer product samples can be seen, and are not listed here;
c) For the frequency of the input power supply, the adaptive range of the thyristor/diode module is wider, and the type selection is not affected generally.
d) The three-phase bridge rectifier used in the patent is generally assembled in a complete set according to a typical circuit diagram by purchasing a thyristor/diode module from the market, and meanwhile, a power filter or a direct current chopper can be selected according to the power requirement for eliminating harmonic waves to improve the quality of a power supply or the stability of the power supply voltage.
2. The direct current is converted into 220V/50HZ single-phase alternating current. The direct current power supply is input into the PWM single-phase inverter and outputs 220V/50HZ single-phase sinusoidal alternating current through the control circuit. The method comprises the following steps: the output frequency of 50HZ is realized by changing the alternating conduction time of the elements in the PWM single-phase inverter; changing the on-off time ratio of the inverter switching device to change the pulse width and realize the output voltage of 220V; see fig. 3 for a typical view of a PWM single-phase inverter. Control of the alternating on-times and pulse widths is typically achieved by PWM control circuits. The PWM control circuit is described as follows:
the PWM control circuit is a digital circuit with a microprocessor as a core, and its function is mainly to receive various setting information and instructions (signal wave Ur and carrier wave Uc in fig. 4), and then to form signals for driving the inverter to operate according to their requirements. Fig. 4 shows a PWM single-phase inverter with a control circuit, wherein the core device is a PWM regulator, and the well-known semiconductor factories in the world have their own PWM regulators, and the technology has been new. Such as PWM switching regulators SG3524/SG3525, manufactured by law corporation, and the like. Taking the unipolar PWM control principle (fig. 4) as an example, the implementation procedure is described as follows:
a) The positive half cycle of Ur, VT1 remains on, VT2 remains off, VT4 is turned on when Ur > Uc, VT3 is off, uo=ud; when Ur < Uc, VT4 is turned off, VT3 is turned on, uo=0, see Uo output waveform positive pressure waveform;
b) Ur negative half cycle, VT1 remains off, VT2 remains on: when Ur < Uc, VT3 is turned on, VT4 is turned off, uo= -Ud; when Ur > Uc, VT3 is turned off, VT4 is turned on, uo=0, see Uo output waveform negative pressure waveform;
c) Aiming at different output frequency requirements, different alternating conduction times of VT 1-VT 4 are set in a control circuit;
d) The NTS series sine wave inverter produced by Ming-Fed power company meets the requirements of the PWM single-phase inverter (comprising a control circuit), and meanwhile similar products are more in the market, and the description is omitted here.
2. A direct-current output bypass is arranged at the outlet of the storage battery, and a controllable direct-current power supply is used for supplying power to a direct-current load through a power supply controller. In the green ammonia device, there are 2 kinds of key equipment common dc power supplies, specifically:
a) An electrolytic cell. The electrolytic tank usually uses a direct current power supply, and the running load of the electrolytic tank can be effectively controlled through a power supply controller;
b) An electric heater of the ammonia synthesis tower. Because the internal space of the ammonia synthesis tower of the green ammonia device is limited, the electric heater usually adopts a single loop, the direct current power supply of the device can be used, the temperature rise time and amplitude in the tower can be effectively controlled through the power supply controller, and the normal operation of equipment is ensured;
c) SHD series IGBT direct current conversion products produced by the sunlight power company meet the requirements of the power supply controller of the patent, and similar products on the market are very common at the same time, and are not repeated here.
3. And the redundancy of an output power supply is realized by parallel connection of two sets of three-phase bridge rectifiers and PWM single-phase inverters.
The device is connected in parallel by adopting two sets of three-phase bridge rectifier and PWM single-phase inverter devices with the same specification and model, and the two sets of devices are debugged to synchronous output, so that the redundancy of an output power supply can be realized.
4. Through increasing the storage battery unit at the three-phase bridge rectifier export for this device has formed three main configuration of advancing singly out UPS, has realized emergency power source's function.
Because the 220V/50HZ power supply can not be provided on site, the device does not provide a bypass of common three-in and single-out UPS configuration on the market and a static switch between the bypass and a main loop, but can realize the emergency power supply function under the condition of power failure by controlling the charge and discharge of a storage battery unit.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present utility model in any way, and all technical solutions obtained by equivalent substitution and the like fall within the scope of the present utility model. The utility model is not related in part to the same as or can be practiced with the prior art.
Claims (6)
1. The utility model provides a be applied to green ammonia device's low pressure power supply distribution unit, its characterized in that includes three-phase bridge rectifier, the single-phase dc-to-ac converter of PWM, storage battery and power supply controller, three-phase bridge rectifier's input is connected three-phase ac power supply, and the output is divided into two-way, and one of them is connected the single-phase dc-to-ac converter of PWM, another way is connected power supply controller, the single-phase dc-to-ac converter of PWM outputs 220V/50HZ single-phase power supply, the controllable DC power supply of power supply controller output, storage battery sets up at three-phase bridge rectifier's delivery outlet end, and the delivery outlet end of storage battery connects the single-phase dc-to-ac converter of PWM and power supply controller's input respectively.
2. The power supply and distribution device for the low-voltage power supply and distribution device for the ammonia-green device according to claim 1, wherein two sets of three-phase bridge rectifier, PWM single-phase inverter and storage battery are arranged, and the two sets of circuits have the same structure and are connected in parallel.
3. The power supply and distribution device for the low-voltage power supply of the ammonia-green device according to claim 1, wherein the PWM single-phase inverter is provided with a PWM regulator, the PWM regulator is used for changing the on-off time of the switching device of the inverter and further changing the pulse width, the input end of the PWM regulator is input with a signal wave Ur and a carrier wave Uc, and the output end of the PWM regulator is respectively connected with four semiconductor modules of the PWM single-phase inverter.
4. A low-voltage power supply and distribution device applied to a green ammonia plant according to claim 3, wherein the PWM regulator is a PWM switching regulator SG3524/SG3525.
5. A low-voltage power supply and distribution device applied to a green ammonia plant according to claim 1, characterized in that the PWM single-phase inverter NTS series sine wave inverter.
6. The power supply and distribution device for the ammonia plant according to claim 1, wherein the power supply controller adopts an SHD series IGBT dc converter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321982588.6U CN220401614U (en) | 2023-07-26 | 2023-07-26 | Power supply and distribution device applied to green ammonia device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321982588.6U CN220401614U (en) | 2023-07-26 | 2023-07-26 | Power supply and distribution device applied to green ammonia device |
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| CN202321982588.6U Active CN220401614U (en) | 2023-07-26 | 2023-07-26 | Power supply and distribution device applied to green ammonia device |
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Address after: 210000 Room 1901, Building G and G-5, Himalayan Commercial Center, Ningnan Street, Yuhuatai District, Nanjing City, Jiangsu Province Patentee after: Kepeso Green Energy Technology (Nanjing) Co.,Ltd. Country or region after: China Address before: 210000 Room 1901, Building G and G-5, Himalayan Commercial Center, Ningnan Street, Yuhuatai District, Nanjing City, Jiangsu Province Patentee before: Nanjing Kepso Engineering Co.,Ltd. Country or region before: China |