CN209913507U - Intelligent direct current power supply system and network - Google Patents
Intelligent direct current power supply system and network Download PDFInfo
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- CN209913507U CN209913507U CN201921015179.2U CN201921015179U CN209913507U CN 209913507 U CN209913507 U CN 209913507U CN 201921015179 U CN201921015179 U CN 201921015179U CN 209913507 U CN209913507 U CN 209913507U
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Abstract
An intelligent direct current power supply system and a network are provided to solve the problems of high construction cost, large power loss, waste of installed capacity of a transformer and the like. The power supply system comprises a first direct current bus, a second direct current bus, a plurality of AC/DC converters, an energy storage unit and a first controller, wherein the first direct current bus is connected with a first LED lamp for common illumination and a second LED lamp for emergency illumination in a hanging mode, the AC/DC converters are connected with the first direct current bus and the second direct current bus in a switching mode through a first selector switch, the energy storage unit is connected to the first direct current bus in a hanging mode through a first bidirectional DC/DC converter, and the first controller controls the first LED lamp and the second LED lamp to work and controls the AC/DC converters to switch between the first direct current bus and the second direct current bus. The power supply network comprises at least two intelligent direct current power supply systems, and a first direct current bus and a second direct current bus of all the intelligent direct current power supply systems are correspondingly connected.
Description
Technical Field
The utility model relates to an intelligence DC power supply system and power supply network belongs to the DC power supply field.
Background
In public places, in order to avoid the failure of lighting after the power grid is interrupted, a special emergency lighting system is generally provided, and the emergency lighting system comprises an AC/DC converter, a storage battery and an inverter, wherein when the power grid is interrupted, the storage battery converts direct current into alternating current for supplying power to realize emergency lighting. Such lighting systems suffer from the following drawbacks: 1. the ordinary illumination and the emergency illumination are two sets of independent systems, and the construction cost is high. 2. The emergency lighting system adopts a high-power inverter, so that the cost is high and the power loss is large. 3. Because its battery is often in idle state, in order to guarantee emergency lighting, need regularly inspection and maintenance, make the battery keep full charge state. 4. In public places, besides a lighting system, a plurality of other electric devices exist, in order to ensure that the lighting system and all the devices can be used simultaneously, the installed capacity of the transformer needs to be large enough, and in actual operation, all the devices are not operated at full load, so that the installed capacity of the transformer is wasted.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an intelligence direct current supply system to solve the construction cost height that current lighting system exists, power loss is big, maintain inconvenient and the extravagant problem of transformer installed capacity, and realize each other being equipped with each other.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a pair of intelligence DC power supply system includes:
the first direct current bus (7) is connected with a first LED lamp (5) for common illumination and a second LED lamp (8) for emergency illumination in a hanging mode through an electronic switch;
a second direct current bus (7') to which non-lighting electric equipment is attached;
a plurality of AC/DC converters (2), the input ends of which are connected with an alternating current network, and the output ends of which are switchably connected with the first direct current bus and the second direct current bus through a first selector switch (2');
the energy storage unit (11) is hung on the first direct current bus through a first bidirectional DC/DC converter (10), the capacity of the energy storage unit is more than twice of the electric quantity required by emergency lighting, and the energy storage unit and the first bidirectional DC/DC converter are connected with an electric quantity management subsystem (12) which is used for stopping the energy storage unit from supplementing the electric quantity to the first direct current bus when the electric quantity of the energy storage unit is reduced to be close to the electric quantity required by the emergency lighting; and
a first controller (4) connected to the ac power grid through a sampling circuit and to a control terminal of the electronic switch for detecting a state of the ac power grid and controlling the electronic switch such that the first LED lamp is turned off and the second LED lamp is turned on after the ac power grid fails; the first controller is further connected with the control end of the first selector switch and the control ends of the AC/DC converters and is used for controlling the AC/DC converters to switch between the first direct current bus and the second direct current bus and controlling the output voltage of the AC/DC converters to be matched with the voltage of the switched direct current bus.
Preferably, the intelligent direct current power supply system further comprises an electric quantity turnover subsystem (13) hung on the second direct current bus (7') and used for connecting an external battery pack and further utilizing the external battery pack to realize electric quantity turnover.
Preferably, the power turnover subsystem (13) comprises an external battery interface (132) and a second controller (133) connected with the external battery interface (132) and used for controlling power turnover, wherein the external battery interface (132) is hung on the second direct current bus through a second bidirectional DC/DC converter (131), and the second controller is connected with a user terminal (134) for a user to input information and display information to the user.
Preferably, the external battery interface (132) is a charging pile for charging the new energy vehicle, and the external battery pack is a power battery pack of the new energy vehicle.
Preferably, the user terminal (134) is a smart phone or a dedicated terminal provided at the external battery interface (132).
Preferably, the intelligent dc power supply system further comprises a self-generating electronic system (14) switchably connected with the first dc bus and the second dc bus by a second selection switch (14').
The utility model also provides an intelligence direct current supply network, this intelligence direct current supply network include two at least as above-mentioned arbitrary one intelligence direct current power supply system, all intelligence direct current power supply system's first direct current generating line and second direct current generating line correspond continuously.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
the construction cost is low. The lamp for ordinary illumination and the lamp for emergency illumination are both hung on the same direct current bus (first direct current bus), an inverter is not needed, and the construction cost can be effectively saved.
The power loss is small. The inverter is not arranged, and the direct current does not need to be inverted into the alternating current, so that the power loss can be effectively reduced.
And the maintenance is convenient. The energy storage unit supplies power for emergency lighting and also supplies power for common lighting in an auxiliary manner, in other words, the energy storage unit is charged and discharged during common lighting, the energy storage unit is intelligently managed every day, manual regular inspection and maintenance of the energy storage unit are not needed, and the maintenance is more convenient.
The installed capacity of the transformer can be reduced. The energy storage unit and the electric quantity management subsystem are matched to realize electric quantity turnover, and can be used in the electricity consumption peak period by the energy storage turnover in the electricity consumption valley period, so that the installed capacity of the transformer can be reduced, the efficiency of the transformer in the electricity consumption peak period and the electricity consumption valley period can not be changed greatly, and the installed capacity waste of the transformer can be avoided.
Can realize mutual aid and mutual backup. The AC/DC converters are provided with a plurality of AC/DC converters, each AC/DC converter is switchably connected with the first direct current bus and the second direct current bus through the first selector switch, so that the distribution of electric quantity between the first direct current bus and the second direct current bus can be adjusted by controlling the first selector switch, and therefore more electric quantity can be distributed to non-lighting electric equipment in the low-valley period of lighting, and more electric quantity can be distributed to lighting equipment in the peak period of lighting, and mutual-aid and mutual-backup are realized.
Drawings
FIG. 1 is a block diagram of an intelligent DC power supply system;
FIG. 2 is a block diagram of an intelligent DC supply network;
reference numerals: 1. an alternating current grid; 2. an AC/DC converter; 2', a first selection switch; 3. a sampling circuit; 4. a first controller; 5. a first LED lamp; 6. a first electronic switch; 7. a first direct current bus; 7', a second direct current bus; 8. a second LED lamp; 9. a second electronic switch; 10. a first bidirectional DC/DC converter; 11. an energy storage unit; 12. an electric quantity management subsystem; 13. an electric quantity circulation subsystem; 131. a second bidirectional DC/DC converter; 132. an external battery interface; 133. a second controller; 134. a user terminal; 14. an autonomous electronic system; 14' and a second selection switch.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Referring to fig. 1, the intelligent dc power supply system includes: the system comprises a first direct current bus 7, a second direct current bus 7', a plurality of AC/DC converters 2, a first LED lamp 5, a second LED lamp 8, an energy storage unit 11, a first controller 4 and an electric quantity management subsystem 12.
The first LED lamp 5 is hung on the first direct current bus 7 through the first electronic switch 6 and used for common illumination; the second LED lamp 8 is hung on the first direct current bus 7 through a second electronic switch 9 and used for emergency lighting. The first LED lamp 5 and the second LED lamp 8 are different in that the number of the second LED lamps 8 is small and power consumption is small. The second dc bus 7' is used to supply power to the non-lighting electric devices.
The voltage of the first direct current bus 7 is adjustable between 200V and 300V, and the voltage of the second direct current bus 7' is adjustable between 200V and 750V.
The AC/DC converters 2 are used for converting high-voltage alternating current into direct current to be output, and the output voltage of the AC/DC converters 2 is adjustable within the range of 200V-750V. It is noted that, a plurality of AC/DC converters 2 are used and the mutual backup is realized by a plurality of first selection switches 2 ', and the first selection switches 2' may be, but not limited to, single-pole double-throw switches. Specifically, an input end of each AC/DC converter 2 is connected to the AC power grid 1, an output end of each AC/DC converter 2 is connected to a common end of a first selection switch 2 ', and two selection ends of the first selection switch 2 ' are respectively connected to the first DC bus 7 and the second DC bus 7 ', that is, an output end of each AC/DC converter 2 is switchably connected to the first DC bus 7 and the second DC bus 7 ' through the first selection switch 2 '. The first controller 4 is connected with the control end of the first selector switch 2 'and the control ends of the plurality of AC/DC converters 2, and is used for controlling the AC/DC converters 2 to switch between the first direct current bus 7 and the second direct current bus 7' and controlling the output voltage of the AC/DC converters 2 to be matched with the voltage of the switched direct current bus. Therefore, when the lighting system is in the low-ebb period, more AC/DC converters 2 can be connected to the second direct current bus 7' to supply power to other non-lighting equipment (including but not limited to charging piles and the like), and when the lighting system is in the high-peak period, more AC/DC converters 2 can be connected to the first direct current bus 7 to supply power to the lighting equipment, so that mutual-aid and mutual-backup are realized.
The energy storage unit 11 is connected to the first DC bus 7 via the first bidirectional DC/DC converter 10. It should be noted that the capacity of the energy storage unit 11 is more than twice of the electric quantity required for emergency lighting, and the energy storage unit 11 and the first bidirectional DC/DC converter 10 are connected to an electric quantity management subsystem 12, which is used for stopping the energy storage unit 11 from supplementing the electric quantity to the first DC bus 7 when the electric quantity of the energy storage unit 11 decreases to be close to the electric quantity required for emergency lighting. The design is such that the energy storage unit 11 has the following two functions: firstly, providing electric quantity for emergency lighting; and secondly, the electric quantity turnover is realized, so that the installed capacity of the transformer is reduced, and the waste of the installed capacity of the transformer is avoided, specifically, the turnover of the electric quantity refers to that the energy storage unit 11 is controlled to absorb the electric quantity for charging in the power consumption valley period, and the energy storage unit 11 is controlled to discharge electricity to supplement the electric quantity to the first direct current bus 7 in the power consumption peak period, so that the installed capacity of the transformer is reduced, the operation efficiency of the transformer does not change greatly in the power consumption valley period and the power consumption peak period, and the waste of the installed capacity of the transformer is avoided. The power management subsystem 12 sets a minimum power, which is a power for ensuring emergency lighting, in other words, the minimum power can be maintained for a specified time (for example, 24 hours) for emergency lighting, and the power stops being discharged continuously when the power reaches the minimum power in the process of the energy storage unit 11 discharging to achieve power turnover.
The first controller 4 is connected with the alternating current power grid 1 through the sampling circuit 3, is connected with a control end of the first electronic switch 6 and a control end of the second electronic switch 9, and is used for sampling current or voltage of the alternating current power grid 1, monitoring the alternating current power grid 1 in real time, and controlling the control end of the first electronic switch 6 and the second electronic switch 9 to enable the first LED lamp 5 to be turned off and the second LED lamp 8 to be turned on after the alternating current power grid 1 fails, so that emergency lighting is achieved. The first electronic switch 6 and the second electronic switch 9 can adopt electromagnetic switches such as relays and the like, can also adopt controllable silicon, and can also adopt high-power MOS tubes and the like.
The intelligent direct current power supply system further comprises an electric quantity turnover subsystem 13 which is connected with the second direct current bus 7' in a hanging mode and used for being connected with an external battery pack and further utilizing the external battery pack to achieve electric quantity turnover. The external battery pack can be an independent battery pack, and can also be a battery pack on other equipment, such as a power battery pack of a new energy vehicle. Therefore, the electric energy can be stored in the electricity consumption valley period to supplement the power supply in the electricity consumption peak period, thereby reducing the pressure of a power grid and reducing the electricity consumption cost.
In a preferred embodiment, the power turnover subsystem 13 includes an external battery interface 132, and a second controller 133 connected to the external battery interface 132 for controlling power turnover, wherein the external battery interface 132 is connected to the second DC bus 7' through a second bidirectional DC/DC converter 131, and the second controller 133 is connected to a user terminal 134 for inputting and displaying information to a user.
As a better embodiment, the external battery interface 132 is a charging pile for charging the new energy vehicle, and the external battery pack is a power battery pack of the new energy vehicle. Like this, can utilize this electric quantity turnover subsystem 13 to charge for the new forms of energy car on the one hand, on the other hand, can realize the electric quantity turnover with the idle time of new forms of energy car. The second controller 133 further includes a strategy generation module, under which the power battery pack can be used to realize the power turnover and the power battery pack can be charged to a set power when the pickup time is reached; the policy generation module includes: a submodule for calculating the time required by charging according to the required electric quantity; and a submodule for calculating the electric quantity turnover strategy according to the coming time, the electricity utilization peak period, the electricity utilization valley period, the car taking time and the charging time. The second controller 133 further includes a turnover counting module for counting turnover power, so that the vehicle owner can be attracted to use the system by paying a certain usage fee to the vehicle owner by metering the turnover power.
The user terminal 134 is preferably a smart phone, and communicates with the second controller 133 through the phone APP, so that the user can input information, such as car pickup time, required electric quantity, etc., or display information, such as turnover electric quantity, converted usage fee, charging fee, etc., to the user. The user terminal 134 is also preferably a dedicated terminal provided at the external battery interface 132.
The intelligent direct current power supply system further comprises a spontaneous electronic system 14, and the spontaneous electronic system 14 can be a power generation system which is installed at a user end and used for photovoltaic power generation, wind power generation and the like. The self-generating electronic system 14 is switchably connected with the first direct current bus 7 and the second direct current bus 7 ' through a second selector switch 14 ', and a control end of the second selector switch 14 ' is connected with the first controller 4 to control the self-generating electronic system 14 to supply power to the first direct current bus or the second direct current bus. Specific power supply strategies include, but are not limited to, power supply from the power generation system 14 after an AC power grid failure, and auxiliary power supply from the power generation system 14 during peak power periods.
The working principle of the intelligent direct current power supply system is as follows:
1. when the alternating current power grid 1 is normal, high-voltage alternating current from the power grid is converted into direct current through the AC/DC converter 2 and is transmitted to the first direct current bus 7, and the first controller 4 samples electrical parameters (current, voltage or power) through the sampling circuit so as to monitor whether the power grid is interrupted. When the power grid is normal, the first controller 4 controls the first LED lamp 5 to be turned on and the second LED lamp 8 to be turned off through the first electronic switch 6 and the second electronic switch 9, so that ordinary illumination is achieved, conversely, when the power grid is interrupted, the energy storage unit 11 discharges electricity to the first direct current bus 7, and the first controller 4 controls the first LED lamp 5 to be turned off and the second LED lamp 8 to be turned on, so that emergency illumination is achieved. When the power grid is normal, the electric quantity management subsystem 12 judges whether the current power utilization peak period or the current power utilization valley period is the power utilization peak period, if the current power utilization valley period is the power utilization valley period, the first bidirectional DC/DC converter 10 is controlled to enable the energy storage unit 11 to absorb electric quantity from the first direct current bus 7 for charging, otherwise, if the current power utilization peak period is the power utilization peak period, the energy storage unit 11 is discharged to supplement the electric quantity to the first direct current bus 7, in the discharging process, the electric quantity management subsystem 12 also samples the electric quantity of the energy storage unit 11, and when the residual electric quantity reaches the set minimum electric quantity, the discharging is controlled to stop. The electricity consumption valley period and the peak period may be time periods manually set according to specific application occasions, for example, the off-duty peak period is set as the electricity consumption peak period at a subway station, and other time periods are set as the electricity consumption valley period. A current sensor or the like may be used to monitor the actual power usage to determine whether the current power usage is in the valley or peak periods.
2. When the lighting peak period is entered, the first controller 4 controls the first selection switch 2 'to disconnect a part of the AC/DC converter 2 from the second DC bus 7', and adjusts the output voltage of the part of the AC/DC converter 2 to the voltage of the first DC bus 7, and then connects the part of the AC/DC converter 2 to the first DC bus 7. On the contrary, when the lighting valley period is entered, the first controller 4 controls the first selector switch 2 ' to disconnect a part of the AC/DC converter 2 from the first DC bus 7, and adjusts the output voltage of the part of the AC/DC converter 2 to the voltage of the second DC bus 7 ', and then connects the part of the AC/DC converter 2 to the second DC bus 7 '. Thus, the number of the AC/DC converters 2 connected to the first DC bus 7 and the second DC bus 7' can be intelligently adjusted, and the mutual-aid effect can be achieved.
3. The electric quantity circulation subsystem 13 absorbs and stores electric quantity from the second direct current bus in the electricity utilization valley period and supplements and supplies the electric quantity to the second direct current bus in the electricity utilization peak period.
4. The first controller 4 controls the second selection switch 14 'to connect the self-generating electronic system 14 to the first direct current bus 7 or the second direct current bus 7' to realize power supply. After a fault in the ac power supply system 1, the autonomous electronic system 14 is preferably connected to the first dc bus 7.
Referring to fig. 2, the intelligent dc power supply network includes a plurality of the aforementioned intelligent dc power supply systems 100, and the first dc bus 7 and the second dc bus 7' of all the intelligent dc power supply systems 100 are correspondingly connected. Specific attachment means may be, but are not limited to, star, chain, well, etc. By adopting the intelligent direct current supply network, when any one or more intelligent direct current supply systems 100 have a fault, other intelligent direct current supply systems 100 can supply power to the intelligent direct current supply systems with the fault, so that the effect of mutual assistance and mutual backup is achieved.
The intelligent dc power supply system 100 in the present intelligent dc power supply network may be a power supply system of a building, a factory, or the like.
The present invention has been described in detail with reference to the specific embodiments, and the detailed description is only for assisting the skilled person in understanding the content of the present invention, and can not be understood as the limitation of the protection scope of the present invention. Various decorations, equivalent changes and the like which are performed on the scheme by the technical personnel in the field under the conception of the invention are all included in the protection scope of the invention.
Claims (8)
1. An intelligent DC power supply system, comprising:
the first direct current bus (7) is connected with a first LED lamp (5) for common illumination and a second LED lamp (8) for emergency illumination in a hanging mode through an electronic switch;
a second direct current bus (7') to which non-lighting electric equipment is attached;
a plurality of AC/DC converters (2), the input ends of which are connected with an alternating current network, and the output ends of which are switchably connected with the first direct current bus and the second direct current bus through a first selector switch (2');
the energy storage unit (11) is hung on the first direct current bus through a first bidirectional DC/DC converter (10), the capacity of the energy storage unit is more than twice of the electric quantity required by emergency lighting, and the energy storage unit and the first bidirectional DC/DC converter are connected with an electric quantity management subsystem (12) which is used for stopping the energy storage unit from supplementing the electric quantity to the first direct current bus when the electric quantity of the energy storage unit is reduced to be close to the electric quantity required by the emergency lighting; and
a first controller (4) connected to the ac power grid through a sampling circuit and to a control terminal of the electronic switch for detecting a state of the ac power grid and controlling the electronic switch such that the first LED lamp is turned off and the second LED lamp is turned on after the ac power grid fails; the first controller is further connected with the control end of the first selector switch and the control ends of the AC/DC converters and is used for controlling the AC/DC converters to switch between the first direct current bus and the second direct current bus and controlling the output voltage of the AC/DC converters to be matched with the voltage of the switched direct current bus.
2. The intelligent dc power supply system according to claim 1, further comprising a power turnover subsystem (13) connected to the second dc bus (7') for connecting an external battery pack and further utilizing the external battery pack to realize power turnover.
3. The intelligent direct-current power supply system according to claim 2, wherein the power turnover subsystem (13) comprises an external battery interface (132), and a second controller (133) connected with the external battery interface (132) and used for controlling power turnover, wherein the external battery interface (132) is hung on the second direct-current bus through a second bidirectional DC/DC converter (131), and the second controller is connected with a user terminal (134) for inputting and displaying information to a user.
4. The intelligent DC power supply system according to claim 3, wherein the external battery interface (132) is a charging pile for charging a new energy vehicle, and the external battery pack is a power battery pack of the new energy vehicle.
5. The intelligent DC power supply system according to claim 4, wherein the user terminal (134) is a smart phone or a dedicated terminal provided at the external battery interface (132).
6. The intelligent DC power supply system according to claim 5, wherein the second controller (133) further comprises a turnover number counting module for counting turnover power.
7. The intelligent DC power supply system according to any one of claims 1 to 6, further comprising an autonomous electronic system (14) switchably connected to the first DC bus and the second DC bus by a second selection switch (14').
8. An intelligent dc supply network, characterized in that it comprises at least two intelligent dc supply systems according to any one of claims 1 to 7, the first dc bus and the second dc bus of all the intelligent dc supply systems being connected correspondingly.
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| CN201921015179.2U CN209913507U (en) | 2019-06-29 | 2019-06-29 | Intelligent direct current power supply system and network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110190616A (en) * | 2019-06-29 | 2019-08-30 | 深圳高力特通用电气有限公司 | A kind of intelligent DC power supply system and network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110190616A (en) * | 2019-06-29 | 2019-08-30 | 深圳高力特通用电气有限公司 | A kind of intelligent DC power supply system and network |
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