CN212726478U - Distributed new energy direct current power supply device system - Google Patents
Distributed new energy direct current power supply device system Download PDFInfo
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- CN212726478U CN212726478U CN202021821833.1U CN202021821833U CN212726478U CN 212726478 U CN212726478 U CN 212726478U CN 202021821833 U CN202021821833 U CN 202021821833U CN 212726478 U CN212726478 U CN 212726478U
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Abstract
The utility model relates to a distributing type new forms of energy DC power supply device system relates to DC power supply technical field. The system is formed by connecting a new energy source, an electric accumulator, a direct current load, a change-over switch, an inverter, a rectifier, an electric quantity metering device, a grid-connected control device and a public power grid. The new energy is a solar power generation device and a wind power generation device which output direct current. The accumulator is a battery, a capacitor, a super capacitor and a graphene super capacitor. The direct current load is a refrigerator, an air conditioner, a washing machine and an alternating current and direct current dual-purpose electric appliance based on direct current frequency conversion. A distributed new energy direct current power supply device system based on the technical development opportunity of 'distributed + energy storage' and the technical development of refrigerators, air conditioners, washing machines and alternating current-direct current dual-purpose electric appliances based on direct current frequency conversion is implemented in a fixed or mobile mode by adopting modular configuration according to different power supply actual conditions, and provides a new technical material basis for improving the utilization efficiency of new energy and reducing energy consumption and product cost.
Description
Technical Field
The utility model relates to a direct current power supply technical field specifically indicates a distributing type new forms of energy direct current power supply device system.
Background
"beautiful China", ecological civilization. Among them, new energy sources (solar energy, wind energy and the like) with the characteristics of renewability, permanence, zero emission, green cleanness, sufficient resources and the like are becoming one of the fastest-developing industries in China in recent years.
When ever, the "solar energy only goes out of the way to the application of civil engineering" began to be deeply conscious.
The solar photovoltaic has to be combined with household electrical appliances enterprises to develop civil products in all aspects of life, the research, development and production of the solar electrical appliances undoubtedly provide possibility for low carbon, environmental protection, energy conservation, emission reduction and cost reduction, and the solar photovoltaic is also an important opportunity for breaking through the bottleneck and occupying the competitive high point in the household electrical appliances industry.
According to the prediction of the international energy agency, the photovoltaic becomes the cheapest power generation mode by 2030. Photovoltaic is fully prosperous and depends on distributed power generation. The distributed energy technology is an important development direction of the world energy technology in the future, and has the characteristics of high energy utilization efficiency, small negative environmental influence, improvement on energy supply reliability and good economic benefit.
But the distributed energy system is not independent of the assistance of the energy storage system. Based on the prediction that "energy storage, i.e. future", is the core, the energy storage market will account for 10% -15% of the power industry in the future and is an important technical support for energy revolution, and "distributed + energy storage" will meet the development opportunity. In countries where distributed power generation is relatively mature, such as germany, it is not the large-scale power station but rather these distributed power stations that flourish. Therefore, the market of the user side is opened, and the user is supported to autonomously invest in solar power generation, so that the market becomes a new corner market of new energy industries such as solar energy and the like.
As is well known, in the popularization and application of new energy sources such as solar energy, wind energy and the like, a large bottleneck is that ac power must be supplied to ac loads with relatively high power such as refrigerators, air conditioners, washing machines and the like. The traditional solution is that direct current (including direct current output by new energy such as solar photovoltaic and wind energy) is inverted into alternating current through an inverter (as shown in fig. 1). However, this results in an increase in the cost of devices such as inverters for users and a burden such as a use cost due to a corresponding increase in power consumption, and a reduction in the utilization efficiency of the new energy.
SUMMERY OF THE UTILITY MODEL
For example, the author of the new development of solar energy utilization and building integrated "focused" family energy source "(see" observation of photovoltaic industry "11 th 2010), mentions the problem of resolving the marketization bottleneck of the" family energy source ". After analyzing the cost analysis of the grid-connected photovoltaic system according to developed countries, the cost of the photovoltaic cell accounts for about 66% of the whole system. It is easy to find that the storage battery, the inverter and the like become new bottlenecks for market promotion after the cost of the solar photovoltaic battery is reduced. In a solar building photoelectric and photo-thermal integrated and integrated synchronous power generation and heat supply system, when the cost of 'Xinqin brick Hanwa' serving as a building component is reduced, the 'barrel effect' of price cost factors of a control system, an inverter, a storage battery and other parts in a solar photovoltaic power generation system begins to be prominent, and the 'soft rib' for implementing 'home energy' is formed. Then, the idea of "non-inversion technique" and "the trend of developing household power supply direct current" is proposed.
Meanwhile, the concept of "direct current for household power supply", "direct current in innovative power buildings" and the like is accepted and implemented as a low-carbon life concept.
Nowadays, the advantages of ac power supply are no longer available due to the development of switching power supplies and dc brushless motors. The direct current transmission loss is low, the efficiency of the DC/DC converter is greatly higher than that of a 50Hz (or 60Hz) alternating current transformer, and none of the electricity storage devices, namely a battery and a capacitor, which can directly store electric energy is not direct current input/output. If the conventional solar power generation system is used, the conversion loss is very large if the power of the solar cell is converted into ac/dc for more than 4 times. More importantly, how to fully utilize the advantages of a distributed solar power generation system becomes the focus of new energy development in the future.
An object of the utility model is to overcome the disappearance and not enough that prior art exists, provide a distributing type new forms of energy DC power supply unit system, its characteristics lie in, by the new forms of energy, accumulator, direct current load, change over switch, dc-to-ac converter, rectifier, electric quantity metering device, the controlling means that is incorporated into the power networks, public electric network connects and constitutes.
The new energy is a solar power generation device and a wind power generation device which output direct current, and the direct current voltage range is 24-220V, and the optimal voltage is 220V.
The accumulator is a battery, a capacitor, a super capacitor and a graphene super capacitor.
The direct current load is a refrigerator, an air conditioner, a washing machine and an alternating current and direct current dual-purpose electric appliance based on direct current frequency conversion.
The change-over switch is connected with the inverter as a module.
The rectifier, the electric quantity metering device and the grid-connected control device are connected in a module.
The electric quantity metering device is a bidirectional watt-hour meter or a unidirectional watt-hour meter.
Further, the direct current of the new energy and the electric storage device is synchronously connected with the public power grid through a change-over switch and an inverter module by a grid-connected control device according to voltage, frequency and phase sequence in a feeding mode;
or the new energy and the accumulator are connected with the public power grid switch through the rectifier, the electric quantity metering device and the grid-connected control device module;
or a self-sufficient mode of connection of the new energy source, the storage device and the direct current load.
Or in a modular configuration, fixed or mobile, etc.
As is well known, the household power supply lines widely used in the world are all alternating current, and the specifications of 110V/60Hz and 220V/50Hz are commonly used. Dc supply has many benefits over ac:
1. the DC power supply has no peak voltage, and the requirement on the insulation performance of the line is lower than that of the same AC power supply.
2. The loss of the direct current circuit is smaller than that of the alternating current circuit under the same effective current.
3. The direct current power supply can simplify the design of a power supply and reduce the cost.
4. When the direct current power supply is directly used for occasions such as illumination, the phenomenon of stroboflash can not occur in direct current power supply.
5. The dc supply has a small ripple and no so-called "hum" for the device.
6. The line does not generate periodic electromagnetic interference to the environment.
7. Direct current can be easily distinguished between "neutral" and "hot" by simple definition.
8. The unified standards reduce the cost of configuration such as refrigerators, air conditioners, washing machines, and the like.
9. If backup power sources such as an accumulator and the like are used, direct current power supply does not need inversion, and even when the voltage is the same, direct switching can be performed.
Based on the fact that the normal use voltage of the existing household users is 220V AC, which is already common for the users, if the original 220V AC power supply is changed into 220V DC power supply, the method is easy to accept, and no more changes and special requirements exist.
Further, the system configuration of the power supply device is different according to different users:
all-round: and the system is fully connected with a public power grid and comprises the step of feeding back electric energy to the power grid through an inverter. On the contrary, the electric energy is input from the public power grid, namely, a bidirectional power supply mode is realized.
The direct current of the new energy and the accumulator is synchronously connected with a public power grid through a change-over switch and an inverter module by a grid-connected control device according to voltage, frequency and phase sequence in a feeding mode;
standby type: the utility grid is connected as a backup power source for the users, namely, the input AC of the utility grid is connected with the DC loop of the users through a rectifier.
And the new energy and the accumulator are connected with the public power grid switch through the rectifier, the electric quantity metering device and the grid-connected control device module.
Independent type: and the system is not connected with a public power grid, namely the new energy is an independent direct-current power supply system.
The new energy source, the storage device and the direct current load are connected in a self-supply mode.
Accordingly, the three devices have different configuration and natural configuration cost because of different functional requirements.
As described above, a distributed new energy dc power supply system is based on the opportunities of "distributed + energy storage" technology development and the technical development of refrigerators, air conditioners, washing machines and ac/dc appliances based on dc frequency conversion, and is a power supply system (mode) based on dc power supply, which solves the problems of large energy loss, high device cost and the like in the conventional ac-based power supply mode. Simultaneously, combine the distributing type power supply actual conditions according to the environment difference, the utility model discloses a distributing type new forms of energy DC power supply device system architecture adopts the modularized configuration to modes such as fixed or removal are implemented.
Drawings
FIG. 1 is a block diagram of a prior art power supply;
fig. 2 is a connection block diagram of a distributed new energy dc power supply system according to the present invention;
fig. 3 is a system connection block diagram according to an embodiment of the present invention;
fig. 4 is a connection block diagram of a second system according to an embodiment of the present invention.
Wherein,
1: new energy resource
2: electrical storage device
3: DC load
4: change-over switch
5: inverter with a voltage regulator
6: rectifier
7: electric quantity metering device (two-way watt-hour meter or one-way watt-hour meter)
8: grid-connected control device (automatic transfer switch)
9: public power grid
Detailed Description
The invention will be further described with reference to the following figures and examples
The utility model relates to a distributing type new forms of energy DC power supply unit system (as shown in figure 2), by new forms of energy 1, accumulator 2, direct current load 3, change over switch 4, dc-to-ac converter 5, rectifier 6, electric quantity metering device 7, grid-connected control device 8, public electric network 9 connects the constitution.
The new energy 1 is a solar power generation device and a wind power generation device with direct current output, and the direct current voltage range is 24-220V, preferably 220V.
The electric storage device 2 is a battery, a capacitor, a super capacitor and a graphene super capacitor, and the graphene super capacitor is preferably selected.
The direct current load 3 is a refrigerator, an air conditioner, a washing machine, an alternating current and direct current dual-purpose electric appliance and the like based on direct current frequency conversion.
Further, the change-over switch 4 and the inverter 5 are connected as a module.
The rectifier 6, the electric quantity metering device 7 and the grid-connected control device 8 are connected in a module.
The electric quantity metering device 7 is a bidirectional watt-hour meter or a unidirectional watt-hour meter.
Further, the configuration of the power supply device is different according to the actual situation of the user:
all-round: the direct current of the new energy 1 and the direct current of the accumulator 2 are synchronously connected with a public power grid 9 according to voltage, frequency and phase sequence through a selector switch 4 and an inverter 5 module and a grid-connected control device 8; the electric energy is fed back to the utility grid through the inverter. On the contrary, the electric energy is input from the public power grid, namely, a bidirectional power supply mode is realized.
Embodiment one, standby: the new energy 1 and the electric accumulator 2 are connected with a public power grid 9 through a rectifier 6, an electric quantity metering device 7 and a grid-connected control device 8 module; the utility grid connection serves as a backup power source for the customer, i.e., the utility grid input ac current is connected to the customer dc load via a rectifier (as shown in fig. 3).
Example two, independent form: the new energy 1, the accumulator 2 and the direct current load 3 are connected. And the new energy source is not connected with the public power grid, namely the new energy source is connected with the direct current load through an independent direct current power supply system (as shown in the attached figure 4).
Accordingly, the three devices have different configuration and natural configuration cost because of different functional requirements.
Simultaneously, combine the distributing type power supply actual conditions according to the environment difference, the utility model discloses a distributing type new forms of energy DC power supply unit system architecture adopts the modularized configuration to modes such as fixed or removal are implemented.
To summarize, based on two: based on the core of "energy storage, i.e. future", the energy storage market accounts for 10% -15% of the power industry in the future and is a prediction of important technical support of energy revolution, and the opportunity of distributed + energy storage "will be developed. And the technical development of refrigerators, air conditioners, washing machines and alternating current and direct current dual-purpose electric appliances based on direct current frequency conversion. The utility model provides a distributing type new forms of energy use DC power supply as power supply system (mode) of basis. Is ecological civilization, "beautiful china". Energy conservation and environmental protection, and 'happy home', improves the energy utilization efficiency, reduces the energy consumption and the product cost, and provides a new technical material basis. And furthermore, the conversion from centralized power generation to a distributed off-grid system is exploited, and the entrepreneurship change which has a profound influence on the deployment, improvement and maintenance modes of the power system is left as a blank opportunity. Meanwhile, the distributed energy technology is an important development direction of the future world energy technology, and the distributed energy technology has the characteristics of high energy utilization efficiency, small negative environmental influence, high energy supply reliability and good economic benefit.
Claims (8)
1. A distributed new energy direct current power supply device system is characterized by being formed by connecting a new energy (1), a power storage device (2), a direct current load (3), a change-over switch (4), an inverter (5), a rectifier (6), an electric quantity metering device (7), a grid-connected control device (8) and a public power grid (9);
the direct current of the new energy (1) and the direct current of the electric accumulator (2) are synchronously connected with a public power grid (9) through a selector switch (4), an inverter (5) module and an electric quantity metering device (7) grid-connected control device (8) according to voltage, frequency and phase sequence;
or the new energy (1) and the electric storage device (2) are connected with a switch of a public power grid (9) through a rectifier (6), an electric quantity metering device (7) and a grid-connected control device (8) module;
or the new energy source (1), the accumulator (2) and the direct current load (3) are connected.
2. The distributed new energy direct current power supply system according to claim 1, wherein the new energy (1) is a solar power generation device or a wind power generation device with direct current output, and the direct current voltage range is 24-220V, and is preferably 220V.
3. The distributed new energy direct current power supply device system according to claim 1, wherein the storage device (2) is a battery, a capacitor, a super capacitor, or a graphene super capacitor.
4. The distributed new energy direct current power supply system according to claim 1, wherein the direct current load (3) is a refrigerator, an air conditioner, a washing machine and an ac/dc appliance based on direct current frequency conversion.
5. The distributed new energy direct current power supply system according to claim 1, wherein the change-over switch (4) and the inverter (5) are connected in a module.
6. The distributed new energy direct current power supply device system according to claim 1, wherein the rectifier (6), the electricity metering device (7) and the grid-connected control device (8) are connected in a module.
7. A distributed new energy DC supply system according to claim 1 or 6, characterized in that the electricity metering device (7) is a two-way watt-hour meter or a one-way watt-hour meter.
8. The distributed new energy direct current power supply device system according to claim 1, wherein the system is implemented in a fixed or mobile mode by adopting a modular configuration according to different power supply practical conditions.
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| CN202021821833.1U CN212726478U (en) | 2020-08-27 | 2020-08-27 | Distributed new energy direct current power supply device system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294734A (en) * | 2021-11-30 | 2022-04-08 | 青岛海尔空调器有限总公司 | New energy air conditioner and control method thereof, electronic equipment and storage medium |
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2020
- 2020-08-27 CN CN202021821833.1U patent/CN212726478U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294734A (en) * | 2021-11-30 | 2022-04-08 | 青岛海尔空调器有限总公司 | New energy air conditioner and control method thereof, electronic equipment and storage medium |
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Granted publication date: 20210316 |