A DC load management device

Abstract

The present invention provides a DC load management device, which belongs to the technical field of power management equipment and solves the technical problem of high communication operation cost in the prior art. A DC load management device includes a power access point, an energy storage control circuit, a peak power supply circuit and a valley power supply circuit; the power access point is connected to the load through the peak power supply circuit and the valley power supply circuit respectively; the power access point is connected to the power input end of the energy storage control circuit through the peak power supply circuit and the valley power supply circuit respectively; the power output end of the energy storage control circuit is connected to the load.

Description

Technical Field

[0001] The present invention relates to the technical field of power management equipment, and in particular to a direct current load management device. Background Art

[0002] With the development of science and technology, the number of base stations and data centers has increased dramatically. On January 22, 2021, the Ministry of Industry and Information Technology released a statistical bulletin: In 2020, the total number of communication base stations in China was 9.31 million, with a net increase of 900,000 throughout the year, a total of 5.75 million 4G base stations, and a total of 600,000 new 5G base stations. In 2021, 600,000 5G base stations are planned to be built, and 718,000 5G base stations will be fully opened, of which China Telecom and China Unicom will share 330,000 5G base stations. 5G users are growing at a rate of tens of millions per month, and by the end of 2020, there will be nearly 200 million 5G users in my country. In terms of the density and power consumption of communication base stations, 5G base stations are 3 to 4 times that of 4G base stations. my country's data centers, 510,000 in 2010, 1 million by 2020, with 3,000 cabinets or more centers, 164 in 2010, and 300 now.

[0003] Communications play a vital role in the national economy. The country requires communications to be faster, and consumers demand fee reductions. However, due to the continuous increase in operating costs, operators feel unable to cope with the situation.

[0004] Therefore, the prior art has the technical problem of high communication operation cost. Summary of the invention

[0005] The object of the present invention is to provide a DC load management device to alleviate the technical problem of high communication operation cost in the prior art.

[0006] A DC load management device provided by the present invention includes a power supply access point, an energy storage device control circuit, a peak power supply circuit and a valley power supply circuit;

[0007] The power access point is connected to the load through the peak power supply circuit and the valley power supply circuit respectively;

[0008] The power access point is connected to the power input end of the energy storage control circuit through the peak power supply circuit and the valley power supply circuit respectively;

[0009] The power supply output end of the energy storage control circuit is connected to the load.

[0010] Further, the peak power supply circuit includes a first time control module, a first relay, a first switching power supply and a second switching power supply;

[0011] The first time control module is connected to the control end of the first relay;

[0012] One end of the first relay is connected to the power access point, and the other end is connected to the load and the power input end of the energy storage device control circuit respectively;

[0013] The first switching power supply is located between the first relay and the load;

[0014] The second switching power supply is located between the first relay and a power input terminal of the energy storage device control circuit.

[0015] Further, a diagnostic circuit is included;

[0016] The diagnostic circuit includes a diagnostic module and a second relay;

[0017] One end of the diagnostic module is connected to the energy storage control circuit, and the other end is connected to the control end of the second relay;

[0018] The second relay is connected in parallel with the first relay.

[0019] Further, the energy storage device control circuit includes an energy storage device and a third relay;

[0020] The first control end of the third relay is connected to the first time control module, and the second control end of the third relay is connected to the second time control module;

[0021] The first path of the third relay is connected between the second switching power supply and the power input terminal of the energy storage device, the second path of the third relay is connected between the power output terminal of the energy storage device and the load, and the third path of the third relay is connected between the power output terminal of the valley power supply circuit and the power input terminal of the energy storage device.

[0022] Furthermore, the energy storage device control circuit also includes a delay module;

[0023] The first control end of the third relay is connected to the first time control module through a delay module.

[0024] Further, the valley section power supply circuit includes a second time control module and a fourth relay;

[0025] The second time control module is connected to the control end of the fourth relay;

[0026] One end of the fourth relay is connected to the power access point, and the other end is respectively connected to the power input end of the energy storage control circuit and the load.

[0027] Furthermore, a metering module and a safety device are provided between the power access point and the peak power supply circuit or the valley power supply circuit.

[0028] Furthermore, a metering module and a safety device are provided between the power access point and the diagnostic circuit.

[0029] Furthermore, the safety equipment includes a lightning protection module, an over-voltage and under-voltage over-current protector and an air switch.

[0030] Furthermore, a switch group is provided between the power access point and the peak power supply circuit or the valley power supply circuit.

[0031] The present invention provides a DC load management device, comprising a power access point, an energy storage device control circuit, a peak power supply circuit and a valley power supply circuit; the power access point is connected to the load through the peak power supply circuit and the valley power supply circuit respectively; the power access point is connected to the power input end of the energy storage device control circuit through the peak power supply circuit and the valley power supply circuit respectively; the power output end of the energy storage device control circuit is connected to the load.

[0032] By using the DC load management device provided by the present invention, in the off-peak period (i.e. the period with the lowest electricity price), the power supply charges the energy storage control circuit through the off-peak power supply circuit and directly supplies power to the load; in the parallel period (i.e. the period with moderate electricity price), the power supply charges the energy storage control circuit through the peak power supply circuit and directly supplies power to the load, and can also directly supply power to the load only in the parallel period; in the peak period (i.e. the period with the highest electricity price), the energy storage control circuit supplies power to the load. That is, the power supply circuit is controlled by the DC load management device, and the power supply is used to charge the energy storage control circuit and directly supply power to the load in the off-peak period by means of the time period range of the tidal electricity price, and the energy storage control circuit is used to supply power to the load in the peak period, thereby not only improving the power efficiency, but also effectively reducing the operating cost of communication, which is in line with the environmental protection concept of low-carbon energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A circuit diagram of a DC load management device provided by an embodiment of the present invention;

[0035] Figure 2 The detailed circuit diagram of the DC load management device in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0036] Figure 3The detailed circuit diagram of the DC load management device in the embodiment of the present invention is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The terms "including" and "having" and any variations thereof mentioned in the embodiments of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but may optionally include other steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0039] Communications play a vital role in the national economy. The country requires communications to be faster, and consumers demand fee reductions. However, due to the continuous increase in operating costs, operators feel unable to cope with the situation.

[0040] Therefore, the prior art has the technical problem of high communication operation cost.

[0041] In order to solve the above problems, the present invention provides a DC load management device.

[0042] like Figure 1 As shown, a DC load management device provided by an embodiment of the present invention includes a power access point, an energy storage device control circuit, a peak power supply circuit and a valley power supply circuit; the power access point is connected to the load through the peak power supply circuit and the valley power supply circuit respectively; the power access point is connected to the power input end of the energy storage device control circuit through the peak power supply circuit and the valley power supply circuit respectively; the power output end of the energy storage device control circuit is connected to the load.

[0043] By using the DC load management device provided by the embodiment of the present invention, in the off-peak period (i.e., the period with the lowest electricity price), the power supply charges the energy storage device through the off-peak power supply circuit and directly supplies power to the load; in the parallel period (i.e., the period with moderate electricity price), the power supply charges the energy storage device through the peak power supply circuit and directly supplies power to the load, and can also directly supply power to the load only in the parallel period; in the peak period (i.e., the period with the highest electricity price), the energy storage device supplies power to the load. That is, the power supply circuit is controlled by the DC load management device, and the power supply is used to charge the energy storage device and directly supply power to the load in the off-peak period by taking advantage of the time range of the tidal electricity price, and the energy storage device is used to supply power to the load in the peak period, thereby not only improving the power efficiency, but also effectively reducing the operating cost of communication, which is in line with the environmental protection concept of low-carbon energy saving.

[0044] In a possible implementation, Figure 2 As shown, the peak power supply circuit includes a first time control module, a first relay, a first switch power supply and a second switch power supply; the first time control module is connected to the control end of the first relay; one end of the first relay is connected to the power access point, and the other end is respectively connected to the load and the power input end of the energy storage control circuit; the first switch power supply is located between the first relay and the load; the second switch power supply is located between the first relay and the power input end of the energy storage control circuit. The first time control module is used to control the power supply to charge the energy storage control circuit and directly supply power to the load in the parallel section. The time of the first time module can be set according to the specific time of the level period, and can also be set according to the charging requirements of the energy storage on the basis of the level 1 line section. For example: the first time control module is turned on at 15:00-18:00 and 21:00-23:00, the first time control module sends a control signal to the first relay to turn on the first relay, the power access point supplies power to the load and charges the energy storage control circuit through the first relay, and the first switch power supply and the second switch power supply respectively control the power supply to supply power to the load and the power supply to charge the energy storage control circuit. By setting a first time control module, a first relay, a first switching power supply and a second switching power supply, the power supply is used to supply power to the load during a period of moderate electricity prices while storing energy in the energy storage device, and the power supply mode is reasonably allocated according to the tidal electricity price, thereby reducing electricity costs.

[0045] In a possible implementation, the DC load management device further includes a diagnostic circuit; the diagnostic circuit includes a diagnostic module and a second relay; one end of the diagnostic module is connected to the energy storage control circuit, and the other end is connected to the control end of the second relay; the second relay is connected in parallel with the first relay. The diagnostic module and the second relay are provided, and the energy storage is detected by the diagnostic module during the peak power consumption period. When the voltage is too low (i.e., the power is insufficient), the diagnostic module sends a control signal to the second relay to turn on the second relay, and then the power supply is respectively supplied to the load through the second relay, and the energy storage is charged, so as to prevent the load from being powered off when the energy storage is insufficient.

[0046] In a possible implementation, the energy storage control circuit includes an energy storage and a third relay; the first control end of the third relay is connected to the first time control module, and the second control end of the third relay is connected to the second time control module; the first path of the third relay is connected between the second switching power supply and the power input end of the energy storage, the second path of the third relay is connected between the power output end of the energy storage and the load, and the third path of the third relay is connected between the power output end of the valley power supply circuit and the power input end of the energy storage. The first time control module is used to control the first path and the second path of the third relay, and the second time control module is used to control the third path of the third relay. When the first path is turned on, the power supply charges the energy storage through the peak power supply circuit, when the second path is turned on, the energy storage supplies power to the load, and when the third path is turned on, the power supply charges the energy storage through the valley power supply circuit.

[0047] In a possible implementation, the energy storage control circuit further includes a delay module; the first control end of the third relay is connected to the first time control module through the delay module. When the energy storage device is used to supply power to the load, there will be a delay of several seconds. By setting the delay module, the energy storage device will extend the power supply time to the load during the power supply conversion. When the energy storage device stops supplying power, the power supply device can just take over the energy storage device to supply power to the load, thereby preventing the load from being powered off during the power supply conversion and improving the stability of the power supply.

[0048] In a possible implementation, the valley power supply circuit includes a second time control module and a fourth relay; the second time control module is connected to the control end of the fourth relay; one end of the fourth relay is connected to the power access point, and the other end is respectively connected to the power input end of the energy storage control circuit and the load. The second time control module is used to control the power supply to charge the energy storage control circuit and directly supply power to the load in the valley section. The time of the second time module can be set according to the specific time of the power consumption level 1 line section. Generally, the low power consumption section is at night. For example: the start time of the second time control module is 23:00-07:00 the next day, the second time control module sends a control signal to the fourth relay to turn on the fourth relay, and the power access point supplies power to the load and charges the energy storage control circuit through the fourth relay. By setting the second time control module and the fourth relay, the power supply is used to supply power to the load and store energy in the energy storage device during the period with the lowest electricity price, and the power supply mode is reasonably allocated according to the tidal electricity price, thereby reducing the electricity cost.

[0049] For example, the State Grid implements tidal electricity prices (tiered electricity prices, peak-shifting electricity prices) for users, and makes the following provisions for general industrial and commercial households. The electricity price is divided into four stages:

[0050]

[0051] The time is divided into four periods:

[0052]

[0053] In terms of time periods, the peak period covers the peak period, and the peak period exists in July and August every year. As long as energy is stored in the trough period and released during the high peak period, it is possible to reduce consumption and increase efficiency and reduce operating costs. The best time to reduce electricity costs is the high peak period. The parallel section has a smaller cost reduction, but it can also be used in the parallel section when there is surplus electricity (that is, the parallel section releases energy for energy storage). The cost reduction factor is determined by the size of the load power and the amount of energy stored in the energy storage device. The amount of electricity stored in the energy storage device should be slightly greater than the load power for 8 hours, so as to maximize the cost reduction. After simulation experiments: using a DC48V200AH energy storage device, it can work for 10 hours under a load of 1200W, using 12 degrees of electricity, and reducing costs by 12 yuan. If it is a 3000W DC load, it releases energy for 8 hours during the high peak period, using 24 degrees of electricity, and reducing costs by 24 yuan. The cost is reduced by 24 yuan a day, and the cost is reduced by 8760 yuan a year. In addition, the life cycle of lead-acid batteries in general base stations and computer rooms is 5 to 6 years. A set of 48V200AH batteries is worth about 15,000 yuan. Because the lead-acid batteries (i.e. energy storage devices) in base stations and computer rooms are used as backup power sources very rarely, the number of charge and discharge times is also very small, which causes the reduction of the service life of lead-acid batteries. The use frequency of lead-acid batteries can be greatly increased by adopting this solution, and the service life can be extended to twice the original, about 10 years. The original operating model needs to pay 30,000 yuan in battery costs for 10 years. After adopting this solution, it needs to pay about 15,000 yuan for 10 years, so the battery cost is saved by about 1,500 yuan each year. In summary, a base station reduces electricity costs by about 8,760 yuan a year and reduces battery costs by 1,500 yuan, reducing costs by a total of 10,260 yuan.

[0054] In a possible implementation, Figure 3 As shown, a metering module and a safety device are provided between the power access point and the peak power supply circuit or the valley power supply circuit. The metering module is used for measuring the amount of electricity, and the safety device is used for improving the power supply safety of the DC load management device.

[0055] In a possible implementation, a metering module and a safety device are provided between the power access point and the diagnostic circuit. The metering module is used to measure the amount of electricity, and the safety device is used to improve the power supply safety of the DC load management device.

[0056] In a possible implementation, the safety device includes a lightning protection module, an over-voltage / under-voltage / overcurrent protector, and an air switch. When a safety problem occurs in the DC load management device, the circuit performs corresponding protection.

[0057] In a possible implementation, a switch group is provided between the power access point and the peak power supply circuit or the valley power supply circuit. The switch group is used to control the on and off of each circuit in the DC load management device.

[0058] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] The device provided in the embodiment of the present invention may be specific hardware on the device or software or firmware installed on the device. The implementation principle and technical effects of the device provided in the embodiment of the present invention are the same as those of the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference may be made to the corresponding contents in the aforementioned method embodiment. It can be clearly understood by those skilled in the art that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can all refer to the corresponding processes in the aforementioned method embodiment, and will not be repeated here.

[0060] It should be noted that similar numbers and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and are not to be understood as indicating or implying relative importance.

[0061] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. They should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A DC load management device, characterized in that: It includes power supply access point, energy storage device control circuit, peak power supply circuit and valley power supply circuit; The power access point is connected to the load through the peak power supply circuit and the valley power supply circuit respectively; The power access point is connected to the power input end of the energy storage control circuit through the peak power supply circuit and the valley power supply circuit respectively; The power supply output end of the energy storage device control circuit is connected to the load; The peak power supply circuit includes a first time control module, a first relay, a first switching power supply and a second switching power supply; The first time control module is connected to the control end of the first relay; One end of the first relay is connected to the power access point, and the other end is connected to the load and the power input end of the energy storage device control circuit respectively; The first switching power supply is located between the first relay and the load; The second switching power supply is located between the first relay and the power input terminal of the energy storage device control circuit; The valley section power supply circuit includes a second time control module and a fourth relay; The second time control module is connected to the control end of the fourth relay; One end of the fourth relay is connected to the power access point, and the other end is respectively connected to the power input end of the energy storage control circuit and the load.

2. The DC load management device according to claim 1, characterized in that: Also includes diagnostic circuitry; The diagnostic circuit includes a diagnostic module and a second relay; One end of the diagnostic module is connected to the energy storage control circuit, and the other end is connected to the control end of the second relay; The second relay is connected in parallel with the first relay.

3. The DC load management device according to claim 1, characterized in that: The energy storage device control circuit includes an energy storage device and a third relay; The first control end of the third relay is connected to the first time control module, and the second control end of the third relay is connected to the second time control module; The first path of the third relay is connected between the second switching power supply and the power input terminal of the energy storage device, the second path of the third relay is connected between the power output terminal of the energy storage device and the load, and the third path of the third relay is connected between the power output terminal of the valley power supply circuit and the power input terminal of the energy storage device.

4. The DC load management device according to claim 3, characterized in that: The energy storage device control circuit also includes a delay module; The first control end of the third relay is connected to the first time control module through a delay module.

5. The DC load management device according to claim 1, characterized in that: A metering module and a safety device are arranged between the power access point and the peak power supply circuit or the valley power supply circuit.

6. The DC load management device according to claim 2, characterized in that: A metering module and a safety device are arranged between the power access point and the diagnostic circuit.

7. The DC load management device according to claim 5 or 6, characterized in that: The safety equipment includes a lightning protection module, an over-voltage and under-voltage over-current protector and an air switch.

8. The DC load management device according to claim 1, characterized in that: A switch group is arranged between the power access point and the peak-segment power supply circuit or the valley-segment power supply circuit.

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