CN217115723U - Communication base station power supply system - Google Patents

Abstract

The embodiments of the present application belong to the technical field of communication base stations, and specifically relate to a power supply system for a communication base station. The embodiments of the present application aim to solve the problem in the related art that the standby power supply system stops working when the mains power is cut off and cannot supply power to the communication base station. The communication base station power supply system of the embodiment of the present application includes a mains power supply line, an energy storage device, and a power generation device. The energy storage device includes a first control switch, a power supply battery, and a power supply bus. The first control switch is connected to the power supply bus and the mains power supply line connected, the first control switch is closed when the mains power supply line is energized, and is disconnected when the mains power supply line is powered off; the power supply busbar is electrically connected to the power generating device, and the power supply battery is electrically connected to the power supply busbar; the power supply busbar passes through the second control switch The second control switch is electrically connected with the computer room of the communication base station, and the second control switch is disconnected when the mains power supply line is energized, and closed when the mains power supply line is de-energized. When the mains is cut off, the power generation device and the energy storage device continue to work to provide backup power for the mains.

Description

Communication base station power supply system

technical field

The embodiments of the present application relate to the technical field of communication base stations, and in particular, to a power supply system for a communication base station.

Background technique

The public power grid communication base station is the infrastructure to ensure communication. Its power supply system consists of the mains grid and its own battery. When the mains is out of power, it will complete self-power supply through the battery.

In the related art, the power supply system of the public power grid communication base station also includes a grid-connected backup power supply system, and the grid-connected backup power supply system includes: a grid-connected power generation device and a peak-shaving and valley-filling energy storage device, and the grid-connected power generation device can connect the generated electric energy to It is used in the public power grid and supplies power to the communication base station of the public power grid together with the mains power grid; the peak-shaving and valley-filling energy storage device can store electric energy when the mains electricity price is low (the mains load is low), and connect the electric energy to the public grid It can be used together with the mains power grid to supply power to the communication base station of the public power grid; or when the mains electricity price is high (the mains load peak), the electricity stored when the mains electricity price is low (the mains load trough) is used to realize the rational utilization of resources. while saving electricity bills.

However, both the grid-connected power generation device and the peak-shaving and valley-filling energy storage device are connected to the grid. When the mains is working normally, the grid-connected power generation device and the peak-shaving and valley-filling energy storage device work normally. The power generation device and the energy storage device for peak shaving and valley filling will stop working, and cannot continue to provide backup power support for the public grid communication base station. Once the battery equipped by the public grid communication base station cannot meet the self-supplying capacity, the public grid communication base station will face paralysis. .

Utility model content

The present application provides a power supply system for a communication base station, which is used to solve the problem that the grid-connected backup power supply system also stops working when the mains power is cut off, and cannot continue to provide backup power to the communication base station.

In one aspect, the present application provides a power supply system for a communication base station, including: a mains power supply line, the mains power supply line is used to receive mains power; an energy storage device, the energy storage device includes a first control switch, a power supply battery, and a power supply bus, the first control switch is electrically connected to the power supply bus and the mains power supply line, and the first control switch is used to close when the mains power supply line is electrified, and to supply power when the mains power supply The power supply battery is electrically connected to the power supply bus; the second control switch, the power supply bus is electrically connected to the computer room of the communication base station through the second control switch, and the second control switch is used for The utility model is disconnected when the mains power supply line is electrified, and closed when the mains power supply line is de-energized; and a power generating device, which is electrically connected to the power supply bus.

In a possible implementation manner, the second control switch is a dual power supply automatic switching device, the mains power supply line is electrically connected to the first input end of the dual power supply automatic switching device, and the power supply bus is connected to the The second input end of the dual power supply automatic switching device is electrically connected, and the output end of the dual power supply automatic switching device is used for electrical connection with the computer room of the communication base station.

In a possible implementation manner, the communication base station power supply system further includes a bidirectional DC-AC converter and a controller, and the power supply bus is electrically connected to the first control switch through the bidirectional DC-AC converter; the The controller is electrically connected with the bidirectional DC-AC converter, and the controller is used for controlling the bidirectional DC-AC converter to convert the DC power into the AC power when the power supply current of the mains power supply line is less than the set value, and the The controller is further configured to control the bidirectional DC-AC converter to convert the AC power into the DC power when the power supply current of the commercial power supply line is greater than the set value.

In a possible implementation manner, the power supply system of the communication base station further includes a first DC-DC converter, and the power generating device is electrically connected to the power supply bus through the first DC-DC converter.

In a possible implementation manner, the communication base station power supply system further includes a DC-AC converter, and the power supply bus is electrically connected to the second control switch through the DC-AC converter.

In a possible implementation manner, the power generation device includes a photovoltaic power generation panel, and the photovoltaic power generation panel is electrically connected to the power supply bus.

In a possible implementation manner, the power generating device includes a first output end and a second output end, the first output end is electrically connected to the mains power supply line, and the second output end is connected to the power supply line Busbar electrical connection.

In a possible implementation manner, the energy storage device further includes a backup battery, and the backup battery is used in parallel with the backup battery in the equipment room of the communication base station.

In a possible implementation manner, the backup battery is further electrically connected to the power supply bus, and the power supply bus is used to charge the backup battery.

In a possible implementation manner, the energy storage device further includes a second DC-DC converter, and the backup battery is electrically connected to the power supply bus through the second DC-DC converter.

The power supply system for a communication base station provided by this application includes an energy storage device and a power generation device for providing backup power, the power generation device and the energy storage device are electrically connected, and the backup power can be connected to the commercial power and can also be stored in the energy storage device; The energy device includes a first control switch, the first control switch is connected to the mains, and the first control switch is used for closing when the mains is live and disconnecting when the mains is powered off; the communication base station power supply system also includes a second control switch , the second control switch is electrically connected with the energy storage device and the computer room of the communication base station, and the second control switch is used for disconnecting when the mains is electrified and closing when the mains is disconnected. Therefore, through the cooperation of the first control switch and the second control switch, the power generation device and the energy storage device are integrated into the mains. When the mains is charged, the electric energy is stored during the trough period of mains usage, and the stored energy is replenished during the peak period of mains usage. Electric energy, to achieve the purpose of shaving peaks and filling valleys, while saving electricity costs and realizing the effective use of resources; when the mains is out of power, the power generation device and energy storage device can continue to work, providing backup power for the mains, and solving problems when the mains is out of power. The grid backup power supply system also stops working, and cannot continue to provide backup power to the public grid communication base station.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

FIG. 1 is a schematic diagram 1 of a circuit structure of a power supply system for a communication base station provided by an embodiment of the present application;

FIG. 2 is a schematic diagram 2 of a circuit structure of a power supply system for a communication base station provided by an embodiment of the present application;

FIG. 3 is a third schematic diagram of a circuit structure of a power supply system for a communication base station according to an embodiment of the present application.

Description of reference numbers:

10: Mains power supply line;

20: energy storage device;

30: the second control switch;

40: power generation device;

50: computer room;

60: bidirectional DC-AC converter;

70: the first DC-DC converter;

80: DC to AC converter;

90: AC-DC converter;

101: utility meter;

201: the first control switch;

202: power supply battery;

203: power supply bus;

204: backup battery;

205: the second DC-DC converter;

301: the first input terminal;

302: the second input terminal;

303: output terminal;

601: the first AC terminal;

602: the first DC terminal;

801: the second AC terminal;

802: the second DC terminal;

901: the third AC terminal;

902: the third DC terminal;

2011: First End;

2012: Second End.

Specific embodiments of the present application have been shown by the above-mentioned drawings, and will be described in more detail hereinafter. These drawings and written descriptions are not intended to limit the scope of the concepts of the present application in any way, but to illustrate the concepts of the present application to those skilled in the art by referring to specific embodiments.

Detailed ways

The power supply system of the public power grid communication base station includes a common power supply system and a grid-connected backup power supply system. Generally, the common power supply system supplies power to the public power grid communication base station. When the power supply of the common power supply system is insufficient, the grid-connected backup power supply system supplies power. In the related art, the grid-connected backup power supply system consists of a grid-connected power generation device and a peak-shaving and valley-filling energy storage device. The grid-connected power generation device converts natural energy into electrical energy and then connects to the mains, and together with the mains, supplies power to the public grid communication base station. . The peak-shaving and valley-filling energy storage device is connected to the grid and operates in parallel with the mains power grid. It adjusts the electricity load according to the electricity consumption rules of different users, reduces the load peak, fills the load valley, and stores electricity while adjusting the electricity load. The electric energy is used as backup electric energy to supply power to the public grid communication base station.

However, when the mains is working normally, both the grid-connected power generation device and the peak-shaving and valley-filling energy storage device work. When the mains is powered off, the grid-connected power generation device and the peak-shaving and valley-filling energy storage device will stop working; , the grid-connected power generation device and the peak-shaving and valley-filling energy storage device will not be able to continue to provide backup power support for the public grid communication base station, and the public grid communication base station will face paralysis when the battery of the public grid communication base station cannot meet its own power supply; The electric energy generated by the power generation device and the electric energy stored by the peak-shaving and valley-filling energy storage device cannot be effectively utilized, resulting in a waste of resources.

In view of the above technical problems, an embodiment of the present application provides a power supply system for a communication base station, including an energy storage device and a power generation device for providing backup power, the power generation device and the energy storage device are electrically connected, so that the backup power can be connected to the commercial power , and can also be stored in the energy storage device; the energy storage device includes a first control switch, the first control switch is connected to the mains, and the first control switch is used to close when the mains is electrified and disconnect when the mains is powered off; The communication base station power supply system further includes a second control switch, the second control switch is electrically connected with the energy storage device and the computer room of the communication base station, and the second control switch is used for disconnecting when the mains is electrified and closing when the mains is disconnected. Through the cooperation of the first control switch and the second control switch, the power generation device and the energy storage device are integrated into the mains. When the mains is charged, the electric energy is stored in the low period of mains usage, and the stored electrical energy is replenished in the peak period of mains usage. To achieve the purpose of shaving peaks and filling valleys, at the same time saving electricity costs and realizing the effective use of resources; when the mains power is cut off, the power generation device and the energy storage device can continue to work to provide backup power for the mains. It solves the problem that the grid-connected power generation device and the peak-shaving and valley-filling energy storage device also stop working when the mains is cut off, and cannot continue to provide backup power to the public grid communication base station.

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

Referring to FIG. 1 , a power supply system for a communication base station provided by an embodiment of the present application includes: a commercial power supply line 10 , an energy storage device 20 , a second control switch 30 , and a power generation device 40 .

Among them, the mains power supply line 10 is electrically connected to the communication equipment, air conditioners and lighting equipment in the computer room 50 of the communication base station, and the mains power supply line 10 is used to receive the mains power to supply power to the computer room 50 of the communication base station; the energy storage device 20 Including a first control switch 201, a power supply battery 202 and a power supply bus 203, the power supply battery 202 is electrically connected to the power supply bus 203, the current in the power supply battery 202 can be transmitted to the power supply bus 203, and the current in the power supply bus 203 can also be transmitted to the power supply battery 202. The first control switch 201 includes a first end 2011 and a second end 2012. The first end 2011 is electrically connected to the power supply bus 203, and the second end 2012 is electrically connected to the mains power supply line 10. The first control switch 201 is used to connect to the mains. The power supply line 10 is closed when the power supply line 10 is electrified, and disconnected when the mains power supply line 10 is powered off; that is, when the first control switch 201 detects that the mains power supply line 10 is electrified, the first control switch 201 is closed, and the mains power supply line is closed. The current in 10 can be sent to the power supply bus 203, and the current in the power supply bus 203 can also be sent to the mains; when the first control switch 201 detects that the mains power supply line 10 is powered off, the first control switch 201 is disconnected, and the city The electric power supply line 10 is disconnected from the power supply bus bar 203 , the mains power supply line 10 cannot continue to charge the power supply battery 202 , and the power supply battery 202 cannot continue to provide supplementary power to the mains power supply line 10 .

When the first control switch 201 detects that the mains power supply line 10 is charged, and the first control switch 201 is closed, it also includes the following two implementations: the current in the power supply bus 203 is sent to the mains power supply line 10, or the mains power supply line 10 The current in the mains is sent to the power supply bus 203; wherein, the first control switch 201 can detect whether the current carried by the mains power supply line 10 is within the preset threshold range when the mains power supply line 10 is charged. If the current carried by 10 is less than the minimum preset threshold (mains peak, power consumption is large), the current in the power supply bus 203 will be transmitted to the mains power supply line 10, and will supply power to the computer room 50 along with the mains to make up for the lack of mains power ; If the current carried by the mains power supply line 10 is greater than the highest preset threshold value (mains power trough, power consumption is small), then the current in the mains power supply line 10 will be delivered to the power supply bus 203, and then delivered to the power supply through the power supply bus 203. The battery 202 is used to store excess electrical energy in the power supply battery 202 .

The power supply bus 203 is electrically connected to the computer room 50 of the communication base station through the second control switch 30, and the second control switch 30 is used for disconnecting when the mains power supply line 10 is energized and closing when the mains power supply line 10 is powered off; Said, when the second control switch 30 detects that the mains power supply line 10 is charged, the second control switch 30 is disconnected, the computer room 50 is disconnected from the power supply bus 203, and the power supply bus 203 cannot supply power to the computer room 50. A control switch 201 is closed, and the mains power supply line 10 is connected to the power supply bus 203; when the second control switch 30 detects that the mains power supply line 10 is powered off, the second control switch 30 is closed, and the current in the power supply bus 203 will be delivered to In the computer room 50, at the same time, the first control switch 201 is turned off, and the mains power supply line 10 and the power supply bus bar 203 are not connected.

The power generation device 40 is used to provide electrical energy, and the power generation device 40 is electrically connected to the power supply bus 203. When the mains power supply line 10 is charged, the power generation device 40 transmits current to the mains power supply line 10 through the power supply bus bar 203, and can also supply current through the power supply bus bar 203. The power supply battery 202 is charged; when the mains power supply line 10 is powered off, the power generation device 40 stops delivering current to the mains power supply line 10 , and supplies power to the computer room 50 through the power supply bus bar 203 .

In the communication base station power supply system of the embodiment of the present application, the mains power supply line 10 , the power generation device 40 , the energy storage device 20 , the first control switch 201 and the second control switch 30 cooperate with each other, and the mains power supply line 10 is used to receive the mains power supply. The energy storage device 20 includes a first control switch 201, a power supply battery 202 and a power supply bus 203, the first control switch 201 is electrically connected to the power supply bus 203 and the mains power supply line 10, and the first control switch 201 is used to supply power in the mains The line 10 is closed when it is electrified, and is disconnected when the mains power supply line 10 is powered off; the power supply battery 202 is electrically connected to the power supply bus 203; The switch 30 is used to open when the mains power supply line 10 is energized, and to close when the mains power supply line 10 is powered off; the power generating device 40 is electrically connected to the power supply bus bar 203 . When the mains power is cut off, the power generation device 40 and the energy storage device 20 can continue to work, providing backup power for the mains power supply, so as to solve the problem that the grid-connected power generation device and the peak-shaving and valley-filling energy storage device also stop working when the mains power is cut off. The problem of not being able to continue to provide backup power to the public power grid communication base station; at the same time, the power is stored during the low-valley period of mains usage, and the stored electrical energy is replenished during the peak period of mains usage, so as to reduce the peak and fill the valley while saving electricity costs and realizing the effective use of resources.

Several different implementations of the communication base station power supply system according to the embodiment of the present application are described below:

When the mains power supply line 10 is energized, the mains power is low, and the power generating device 40 is working normally, the first control switch 201 is closed, the second control switch 30 is opened, and the current in the mains power supply line 10 will be transmitted to the power supply bus 203 , the excess electric energy is stored in the power supply battery 202 , and at the same time, the power generation device 40 can also charge the power supply battery 202 through the power supply bus 203 .

When the mains power supply line 10 is energized, the mains power supply peak period, and the power generation device 40 is working normally, the first control switch 201 is closed, the second control switch 30 is turned off, and the power generation device 40 sends the mains power supply line 10 through the power supply bus 203. The current, along with the mains, supplies power to the computer room 50 .

When the mains power supply line 10 is powered off and the power generation device 40 is working normally, the first control switch 201 is turned off, the second control switch 30 is closed, and the power generation device 40 supplies power to the machine room 50 through the power supply bus 203; at the same time, the power supply battery 202 It is also possible to supply power to the machine room 50 through the power supply bus 203 .

When the mains power supply line 10 is powered off and the power generation device 40 fails, the first control switch 201 is turned off, the second control switch 30 is turned on, and the power supply battery 202 supplies power to the computer room 50 through the power supply bus 203 .

When the mains power supply line 10 is energized, the mains power is low, and the power generation device 40 fails, the first control switch 201 is closed, the second control switch 30 is turned off, and the current in the mains power supply line 10 will be transmitted to the power supply bus 203, The excess electric energy is stored in the power supply battery 202 to store electric energy during the low period of commercial power.

When the mains power supply line 10 is energized, the mains power supply peak period, and the power generation device 40 fails, the first control switch 201 is closed, the second control switch 30 is turned off, and the power supply battery 202 transmits current to the mains power supply line 10 through the power supply bus 203. , to supply power to the computer room 50 together with the mains; to supplement the stored electric energy into the mains during the peak period of mains usage, to achieve the purpose of shaving peaks and filling valleys, and at the same time saving electricity costs and realizing the effective use of resources.

In the embodiment of the present application, the second control switch 30 may include a dual power supply automatic switching device, and the dual power supply automatic switching device includes a first input terminal 301, a second input terminal 302 and an output terminal 303. The mains power supply line 10 is connected to the first input terminal 301. The terminal 301 is electrically connected, the power supply bus 203 is electrically connected with the second input terminal 302, and the output terminal 303 is used for electrical connection with the computer room 50 of the communication base station. When the dual power supply automatic switching device detects that the mains power supply line 10 is charged, the first input end 301 is connected to the output end 303, that is, the mains power supply line 10 is electrically connected to the first input end 301, and the power supply bus 203 is connected to the first input end 301. The two input terminals 302 are disconnected, and the computer room 50 is powered by the current of the mains power supply line 10; when the dual power supply automatic switching device detects that the mains power supply line 10 is powered off, the second input terminal 302 is connected to the output terminal 303, and also That is, the mains power supply line 10 is disconnected from the first input end 301 , the power supply bus bar 203 is electrically connected with the second input end 302 , and the computer room 50 is powered by the current of the power supply bus bar 203 .

The dual power supply automatic switching device includes a switching controller. The mains power supply line 10 is the common power supply, and the power supply bus 203 is the standby power supply. When the common power supply is working normally, the switching controller can monitor the common power supply and the standby power supply at any time; when the switching controller When it is detected that the voltage of one phase or more than one phase of the common power supply is abnormal (overvoltage, undervoltage and voltage loss), and after a preset delay time, it is determined that the fault of the common power supply cannot be recovered, the switching controller will control the The first input terminal 301 is disconnected from the output terminal 303, and the second input terminal 302 is controlled to be connected to the output terminal 303 to connect to the backup power supply; when the backup power supply is used for a period of time, the switching controller detects that the normal power supply has returned to normal, After the preset delay time, the switching controller controls the second input end 302 to be disconnected from the output end 303, and controls the first input end 301 to connect with the output end 303, so as to reconnect to the common power supply, which can ensure the computer room 50 in time. Safety and reliability of power supply.

Referring to FIG. 2, in the embodiment of the present application, the power supply system of the communication base station may further include a bidirectional DC-AC converter 60, and the power supply bus 203 is electrically connected to the first control switch 201 through the bidirectional DC-AC converter 60; The device 60 includes a first AC terminal 601 and a first DC terminal 602, the first AC terminal 601 is used for receiving and outputting AC power, the first DC terminal 602 is used for receiving and outputting DC power, and the first AC terminal 601 is connected with the first control The first terminal 2011 of the switch 201 is electrically connected, and the first DC terminal 602 is electrically connected to the power supply bus 203; the bidirectional DC-AC converter 60 converts the DC power of the power supply bus 203 received by the first DC terminal 602 into AC power, and then converts the power from the first DC terminal 602 into AC power. An AC terminal 601 outputs, and is transmitted to the mains power supply line 10 through the first control switch 201 to be connected to the mains power supply as a supplementary power source; After the alternating current is converted into direct current, it is output from the first direct current terminal 602 and sent to the power supply bus 203, and then sent to the power supply battery 202 to store excess electrical energy.

In the above-mentioned embodiment, the power supply system of the communication base station may further include a controller, the controller is electrically connected to the bidirectional DC-AC converter 60, and the controller is configured to control the bidirectional DC-AC converter when the power supply current of the mains power supply line 10 is less than the set value. The converter 60 converts the direct current into alternating current, and the controller is further configured to control the bidirectional direct current to alternating current converter 60 to convert the alternating current into direct current when the supply current of the commercial power supply line 10 is greater than the set value. The set value includes a minimum preset threshold (mains peak, high power consumption) and a maximum preset threshold (mains trough, low power consumption). When the power supply current of the mains power supply line 10 is less than the minimum preset threshold , indicating that the mains is not enough to support the power consumption of the computer room 50, the controller will control the bidirectional DC-AC converter 60 to convert the direct current into alternating current, so that the current in the power supply bus 203 is transmitted to the mains power supply line 10, along with the mains power for the computer room 50 power supply to make up for the shortage of mains power; when the power supply current of the mains power supply line 10 is greater than the highest preset threshold, it means that the mains power is sufficient and there is surplus, and the controller will control the bidirectional DC-AC converter 60 to convert the AC power into DC power, so that the city power The current in the electric power supply line 10 is transmitted to the power supply bus bar 203 and then stored in the power supply battery 202 to save energy.

In the above embodiment, when the mains power supply line 10 is powered off and the power generation device 40 is working normally, the first control switch 201 is turned off and the second control switch 30 is turned on. When the power generation of the device 40 cannot meet the power consumption of the computer room 50, the controller controls the power supply battery 202 to supply power to the computer room 50 through the power supply bus 203 at the same time; and the power delivered by the power supply battery 202 is lower than the power consumption of the computer room 50, ensuring the normal operation of the computer room 50 At the same time to achieve the purpose of energy saving and consumption reduction.

At the same time, the communication equipment in the computer room 50 is graded according to the degree of importance from high to low, and the power supply battery 202 includes a reserved electric capacity, and the reserved electric capacity is the power consumption required by the high-level communication equipment in the computer room 50; In other words, when the electric capacity of the power supply battery 202 is about to be used up, the remaining reserved electric capacity can only supply power to the high-level communication equipment, so as to prolong the working time of the important communication equipment as much as possible.

In the embodiment of the present application, the power supply system of the communication base station may further include a first DC-DC converter 70, and the power generation device 40 is electrically connected to the power supply bus 203 through the first DC-DC converter 70; It is used to convert the DC power into DC power with different voltages (higher or lower voltage) to meet the situation that the power supply voltage provided by the power generating device 40 and the power supply voltage required by the power supply bus 203 are different. The first DC-DC converter 70 includes a DC input terminal and a DC output terminal, the DC input terminal is electrically connected to the power generating device 40 , the DC output terminal is electrically connected to the power supply bus 203 , and the DC input terminal is used to receive the power provided by the power generating device 40 . Direct current, the direct current output terminal is used to output the converted direct current that is adapted to the power supply bus 203 .

In this embodiment of the present application, the power generating device 40 may include a wind turbine, and the wind turbine is electrically connected to the power supply bus 203 . The wind turbine converts the kinetic energy of the wind into electrical energy, which is converted by the first DC-DC converter 70 and then transmitted to the power supply bus 203 of the energy storage device 20 , and supplies power to the machine room 50 through the power supply bus 203 , or stores the electrical energy through the power supply bus 203 In the power supply battery 202, wind energy is a renewable, non-polluting natural energy that can be used for a long time.

In the embodiment of the present application, the power generation device 40 may include a photovoltaic power generation panel, and the photovoltaic power generation panel is electrically connected to the power supply bus bar 203 . The photovoltaic power generation panel is arranged in the open space near the communication base station, and can convert the solar energy into electric energy (direct current), and is converted by the first DC-DC converter 70 and then sent to the power supply bus 203 of the energy storage device 20, and the power supply bus 203 is used for the computer room. 50 to supply power, or to store electrical energy in the power supply battery 202 through the power supply bus 203 .

In the above embodiment of photovoltaic power generation, the power generation device 40 further includes a photovoltaic controller and a photovoltaic battery, the photovoltaic power generation panel converts solar energy into direct current, and the photovoltaic controller is used to regulate the direct current and control the charging and discharging of the photovoltaic battery; the stable direct current in the photovoltaic battery The supply bus 203 that will be delivered to the energy storage device 20 .

Referring to FIG. 3 , in the above embodiment of photovoltaic power generation, the power generation device 40 may include a first output end and a second output end, the first output end is electrically connected to the mains power supply line 10 , and the second output end is connected to the power supply bus bar 203 electrical connection. That is to say, a part of the electric energy generated by the power generating device 40 is directly merged into the mains grid through the first output terminal, and supplies power to the machine room 50 together with the mains; the other part is electrically connected to the power supply bus 203 through the second output terminal for storage in Power supply battery 202.

In the above embodiment, the power supply system of the communication base station may further include an AC-DC converter 90 , and the power supply bus 203 is electrically connected to the first control switch 201 through the AC-DC converter 90 . The AC-DC converter 90 includes a third AC terminal 901 and a third DC terminal 902. The third DC terminal 902 is used for receiving DC power, the third AC terminal 901 is used for outputting AC power, and the third AC terminal 901 is connected with the first control switch 201. The second terminal 2012 is electrically connected, and the third DC terminal 902 is electrically connected to the power supply bus 203 ; the AC-DC converter 90 converts the AC power of the mains power supply line 10 received by the third AC terminal 901 into DC power, and converts the AC power from the third DC terminal 902 to DC power. output, and stored in the power supply battery 202 through the power supply bus 203 .

When the mains power supply line 10 is charged and the power generation device 40 is working normally, the electric energy generated by the power generation device 40 is preferentially output through the second output terminal and stored in the power supply battery 202. When the electric capacity of the power supply battery 202 is full, the power generation device 40 The continuously generated electric energy is merged into the commercial power grid through the first output terminal to avoid waste of resources. When the mains power supply line 10 is powered off and the power generation device 40 is working normally, the first output terminal is disconnected from the mains power supply line 10, and the transmission of electric energy at the first output terminal is stopped, and the electric energy generated by the power generation device 40 only passes through the second output terminal. terminal output.

Wherein, the power generating device 40 may further include a transformer and a current delivery controller, the transformer is used to measure the magnitude of the current passing through the mains power supply line 10, and the current delivery controller is used to control the magnitude of the current output from the first output end and the second output end . If the transformer detects that the current of the mains power supply line 10 is greater than the preset current, it means that the mains is sufficient at this time (the mains usage is low), the current transmission controller controls the second output terminal to output power, and the first output terminal stops Output electric energy; if the transformer detects that the current of the mains power supply line 10 is less than the preset current, it means that the mains power is insufficient at this time (the peak period of mains use), and the current delivery controller will control the second output terminal and the output terminal according to the preset ratio. The first output ends respectively output electric energy. At the same time, the current delivery controller is also used to control the current output by the first output terminal to be less than the three-phase minimum current, so as to prevent the current from being returned to the grid through the utility meter 101 .

In the above embodiment of photovoltaic power generation, during the day, the power generating device 40 will continue to work normally, with sufficient electrical energy to charge the power supply battery 202; at night, the power generating device 40 will stop working, and the first output terminal and the second output terminal of the power generating device 40 will At this time, the power supply current of the power supply battery 202 comes from the mains power supply line 10. That is to say, in the low period of the mains power supply at night, the mains power supply line 10 supplies power to the computer room 50 and generates a large amount of excess power. Electric energy, at this time, the first control switch 201 is closed, and the current in the mains power supply line 10 is transmitted to the power supply bus bar 203 , and then stored in the power supply battery 202 .

The power generating device 40 may further include a DC-AC converter 80, and the commercial power supply line 10 is electrically connected to the first output end of the power generating device 40 through the DC-AC converter 80. The DC-AC converter 80 is used to convert the DC power into AC power, and then The alternating current is then supplied to the mains power supply line 10 .

In this embodiment of the present application, the power supply system of the communication base station may further include a DC-AC converter 80 , and the power supply bus 203 is electrically connected to the second control switch 30 through the DC-AC converter 80 . The DC-AC converter 80 includes a second AC terminal 801 and a second DC terminal 802. The second DC terminal 802 is used for receiving DC power, the second AC terminal 801 is used for outputting AC power, and the second AC terminal 801 is connected with the second control switch 30. The second input terminal 302 is electrically connected, and the second DC terminal 802 is electrically connected to the power supply bus 203 ; the DC-AC converter 80 converts the DC power of the power supply bus 203 received by the second DC terminal 802 into AC power, and outputs the AC power from the second AC terminal 801 . , and is transmitted to the computer room 50 through the second control switch 30 to supply power to the computer room 50 as backup power when the mains power is cut off.

Please continue to refer to FIG. 2 , in the embodiment of the present application, the energy storage device 20 may further include a backup battery 204, and the backup battery 204 is used in parallel with the backup battery in the computer room 50 of the communication base station; wherein, the charging end of the backup battery 204 is connected to the market The electric power supply line 10 and the power generating device 40 are both connected, and the discharge end of the backup battery 204 is connected in parallel with the backup battery in the machine room 50 .

When the mains power supply line 10 is energized, the mains power is in a trough period, and the power generation device 40 is working normally, the first control switch 201 is closed, the second control switch 30 is opened, and the excess electric energy in the mains power supply line 10 will be stored in the power supply battery 202 and the backup battery 204, the power generation device 40 can also charge the power supply battery 202 and the backup battery 204 at the same time; when the mains power supply line 10 is charged, the mains is in a trough period, and the power generation device 40 fails (or cannot provide complete power generation due to external factors). ), the first control switch 201 is closed, the second control switch 30 is opened, and the excess electric energy in the mains power supply line 10 will be stored in the power supply battery 202 and the backup battery 204 . When the mains power supply line 10 is powered off and the power generation device 40 fails, the first control switch 201 is turned off, the second control switch 30 is turned on, and the power supply battery 202 supplies power to the computer room 50 through the power supply bus 203. At the same time, the controller is used to detect Whether the battery remaining capacity of the power supply battery 202 is within the preset capacity range, if the battery remaining capacity of the battery 202 is higher than the maximum capacity, the controller continues to control the power supply battery 202 to transmit current to the mains power supply line 10 through the power supply bus 203, and follows the city power supply line 10. If the remaining battery capacity of the power supply battery 202 is lower than the minimum capacity, the controller controls the backup battery 204 to supply power to the computer room 50 . That is to say, when the remaining battery capacity of the power supply battery 202 is lower than the minimum capacity, it means that the power supply battery 202 can no longer meet the power consumption of the computer room 50. At this time, the backup battery 204 is connected to supply power to the computer room 50 to ensure the normal operation of the communication base station.

At the same time, the discharge end of the backup battery 204 is connected in parallel with the backup battery in the equipment room 50 , so that the backup battery 204 can also directly supply power to the communication equipment in the equipment room 50 while charging the backup battery in the equipment room 50 to ensure the communication in the equipment room 50 The device can continue to have power.

In the above embodiment, the backup battery 204 is also electrically connected to the power supply bus 203, and the power supply bus 203 is used to charge the backup battery 204; wherein the charging end of the backup battery 204 is electrically connected to the power supply bus 203, and the discharge end of the backup battery 204 is connected to the power supply bus 203. The backup batteries in the machine room 50 are connected in parallel, so that the excess electric energy in the mains power supply line 10 is stored in the power supply battery 202 and the backup battery 204 at the same time, and the power generation device 40 can also charge the power supply battery 202 and the backup battery 204 at the same time.

The energy storage device 20 further includes a second DC-DC converter 205 , and the backup battery 204 is electrically connected to the power supply bus 203 through the second DC-DC converter 205 .

In the above-mentioned embodiment, the backup battery 204 is controlled to transmit current to the mains power supply line 10, and while supplying power to the computer room 50 along with the mains, some unimportant AC loads (such as air conditioners, lighting equipment, etc.) in the computer room 50 are disconnected. , so as to prolong the power supply time of important communication equipment in the computer room 50 .

In the above embodiment, the backup battery 204 may include a 48V power supply, which is safe, reliable and economical.

Taking a photovoltaic power generation device as an example, the working principle of the communication base station power supply system provided by the embodiment of the present application will be described in detail with reference to FIG. 2 and FIG. 3 , including the following implementations:

Embodiment 1: The use trough period when the power generation device 40 is working normally and the mains is working normally

During the low period of mains usage, the mains power supply line 10 generates a large amount of excess electric energy in addition to supplying power to the computer room 50, and the power generating device 40 also generates a large amount of electric energy. At this time, the first control switch 201 is closed, the first input end 301 and the output end 303 of the second control switch 30 are connected, the controller detects that the power supply current of the mains power supply line 10 is greater than the highest preset threshold, the mains power is sufficient and there is For the rest, the controller will control the bidirectional DC-AC converter 60 to convert the alternating current into direct current, so that the current in the mains power supply line 10 is transmitted to the power supply bus 203, and then stored in the power supply battery 202, and also stored in the backup battery 204. Due to the low electricity price during the low-valley period of commercial electricity use, storing electricity at this stage can not only save electricity costs, but also realize the effective use of resources.

The DC power generated by the power generating device 40 enters the first DC-DC converter 70 through the DC input terminal of the first DC-DC converter 70 , and is converted into a DC power adapted to the power supply bus 203 in the first DC-DC converter 70 Then, from the DC output terminal of the first DC-DC converter 70; and stored in the power supply battery 202 through the power supply bus 203, and also stored in the backup battery 204 to realize the storage of electric energy. Under the premise of rational use of solar energy, the cost of electricity can be reduced.

Embodiment 2: The peak usage period when the power generation device 40 is working normally and the mains is working normally

During the peak period of mains use, the power consumption is large, and the mains power supply line 10 cannot meet the power supply of the computer room 50, but at this time, the power generation device 40 generates a large amount of electric energy, and the DC power generated by the power generation device 40 passes through the first DC-DC converter 70. The DC input terminal enters the first DC-DC converter 70, and is converted into DC power suitable for the power supply bus 203 in the first DC-DC converter 70 from the DC output terminal of the first DC-DC converter 70, and is sent to the power supply bus 203 .

The first control switch 201 is closed, the first input end 301 of the second control switch 30 is connected to the output end 303, the controller detects that the power supply current of the mains power supply line 10 is less than the minimum preset threshold, and the mains power is insufficient, the controller will control The bidirectional DC-AC converter 60 converts DC power into AC power, so that the current in the power supply bus 203 is sent to the mains power supply line 10 ; Due to the high electricity price during the peak period of mains usage, at this time, the electric energy stored in the down period of the mains power or the electric energy provided by the power generator 40 is supplemented to the mains power supply line 10, which can reduce the power consumption of the mains power supply line 10 and save energy. The efficient use of resources is achieved while reducing electricity costs.

In this embodiment, the DC power generated by the power generating device 40 is preferentially sent to the power supply battery 202 to complete the charging of the power supply battery 202 ;

Embodiment 3: The power generating device 40 works normally, and the mains power is cut off.

When the mains power supply line 10 is powered off, the first control switch 201 is turned off, the second input end 302 and the output end 303 of the second control switch 30 are connected, and the DC power generated by the power generating device 40 passes through the first DC-DC converter 70 . The DC input terminal enters the first DC-DC converter 70, and is converted into DC power suitable for the power supply bus 203 in the first DC-DC converter 70 from the DC output terminal of the first DC-DC converter 70, and is It is sent to the power supply bus bar 203 ; and then the equipment room 50 is supplied with power through the power supply bus bar 203 .

Embodiment 4: At night or when the power generation device 40 fails or the mains power is cut off

When the mains power supply line 10 is powered off, the first control switch 201 is disconnected, the second input end 302 of the second control switch 30 is connected to the output end 303, the power generating device 40 stops supplying current to the power supply bus 20, and the power supply battery 202 Power is supplied to the machine room 50 through the power supply bus 203 .

When the power supply battery 202 supplies power for a period of time, the controller detects that the remaining battery capacity of the battery 202 is lower than the minimum capacity, indicating that the power supply battery 202 can no longer meet the power consumption of the equipment room 50 , and the controller controls the backup battery 204 to supply power to the equipment room 50 , to ensure the normal operation of the communication base station. At the same time, some unimportant AC loads (such as air conditioners, lighting equipment, etc.) in the equipment room 50 are disconnected, so as to prolong the power supply time of the important communication equipment in the equipment room 50 .

Embodiment 5: During the night or when the power generation device 40 is faulty and the mains is working normally

The electricity price is low during the trough period of mains usage, and the mains power supply line 10 supplies power to the computer room 50 and also generates a large amount of excess power. At this time, the first control switch 201 is closed, and the first input end 301 of the second control switch 30 and the output The terminal 303 is connected, the controller detects that the power supply current of the mains power supply line 10 is greater than the highest preset threshold, the mains power is sufficient and there is surplus, the controller will control the bidirectional DC-AC converter 60 to convert the alternating current into direct current, so that the mains power supply line The current in 10 is sent to the power supply bus 203, and then stored in the power supply battery 202, and also stored in the backup battery 204, so as to realize the storage of low-cost electric energy and save electricity costs.

The power generation device 40 stops working, and no longer supplies current to the power supply bus 203 .

Embodiment 6: At night or during the peak usage period when the power generation device 40 fails and the mains work normally

During the peak period of mains usage, the electricity price is relatively high, and the electricity consumption is large. The mains power supply line 10 cannot meet the power supply of the computer room 50, and the power generation device 40 stops working and cannot provide backup power.

At this time, the first control switch 201 is closed, the first input terminal 301 and the output terminal 303 of the second control switch 30 are connected, and the controller detects that the power supply current of the mains power supply line 10 is less than the minimum preset threshold, the mains is insufficient, and controls The controller will control the bidirectional DC-AC converter 60 to convert DC power into AC power, so that the current in the power supply bus 203 is transmitted to the mains power supply line 10 ; the current in the power supply bus 203 comes from the power supply battery 202 .

When the power supply battery 202 supplies power for a period of time, the controller detects that the remaining battery capacity of the battery 202 is lower than the minimum capacity, indicating that the power supply battery 202 can no longer meet the power consumption of the equipment room 50 , and the controller controls the backup battery 204 to supply power to the equipment room 50 , to ensure the normal operation of the communication base station. At the same time, some unimportant AC loads (such as air conditioners, lighting equipment, etc.) in the equipment room 50 are disconnected, so as to prolong the power supply time of the important communication equipment in the equipment room 50 .

In the communication base station power supply system of the embodiment of the present application, the mains power supply line 10 , the power generation device 40 , the energy storage device 20 , the first control switch 201 and the second control switch 30 cooperate with each other, and the mains power supply line 10 is used to receive the mains power supply. The energy storage device 20 includes a first control switch 201, a power supply battery 202 and a power supply bus 203, the first control switch 201 is electrically connected to the power supply bus 203 and the mains power supply line 10, and the first control switch 201 is used to supply power in the mains The line 10 is closed when it is electrified, and is disconnected when the mains power supply line 10 is powered off; the power supply battery 202 is electrically connected to the power supply bus 203; The switch 30 is used to open when the mains power supply line 10 is energized, and to close when the mains power supply line 10 is powered off; the power generating device 40 is electrically connected to the power supply bus bar 203 . When the mains power is cut off, the power generation device 40 and the energy storage device 20 can continue to work, providing backup power for the mains power supply, so as to solve the problem that the grid-connected power generation device and the peak-shaving and valley-filling energy storage device also stop working when the mains power is cut off. The problem of not being able to continue to provide backup power to the public power grid communication base station; at the same time, the power is stored during the low-valley period of mains usage, and the stored electrical energy is replenished during the peak period of mains usage.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application. scope.

Claims (10)

1. a communication base station power supply system, is characterized in that, comprises: a mains power supply line, the mains power supply line is used for receiving mains power; an energy storage device, the energy storage device includes a first control switch, a power supply battery and a power supply bus, the first control switch is electrically connected to the power supply bus and the commercial power supply line, and the first control switch is used for Closed when the mains power supply line is electrified, and disconnected when the mains power supply line is powered off; the power supply battery is electrically connected to the power supply bus; a second control switch, the power supply bus is electrically connected to the computer room of the communication base station through the second control switch, and the second control switch is used for disconnecting the mains power supply line when the mains power supply line is energized. Closed when the power supply line is cut off; A power generating device, the power generating device is electrically connected to the power supply bus. 2. The communication base station power supply system according to claim 1, wherein, The second control switch is a dual power automatic switching device, the mains power supply line is electrically connected to the first input end of the dual power automatic switching device, and the power supply bus is connected to the second dual power automatic switching device. The input end is electrically connected, and the output end of the dual power supply automatic switching device is used for electrical connection with the computer room of the communication base station. 3. The communication base station power supply system according to claim 1, wherein, The communication base station power supply system further includes a bidirectional DC-AC converter and a controller, the power supply bus is electrically connected to the first control switch through the bidirectional DC-AC converter; the controller is connected to the bidirectional DC-AC converter The controller is used to control the bidirectional DC-AC converter to convert the DC power into AC power when the power supply current of the mains power supply line is less than the set value, and the controller is also used to supply power from the mains When the power supply current of the line is greater than the set value, the bidirectional DC-AC converter is controlled to convert the AC power into the DC power. 4. The communication base station power supply system according to claim 3, wherein, The communication base station power supply system further includes a first DC-DC converter, and the power generating device is electrically connected to the power supply bus through the first DC-DC converter. 5. The communication base station power supply system according to claim 4, wherein, The communication base station power supply system further includes a DC-AC converter, and the power supply bus is electrically connected to the second control switch through the DC-AC converter. 6. The communication base station power supply system according to any one of claims 1-5, wherein, The power generation device includes a photovoltaic power generation panel, and the photovoltaic power generation panel is electrically connected to the power supply bus. 7. The communication base station power supply system according to claim 6, wherein, The power generating device includes a first output end and a second output end, the first output end is electrically connected to the mains power supply line, and the second output end is electrically connected to the power supply bus bar. 8. The communication base station power supply system according to any one of claims 1-5, wherein, The energy storage device further includes a backup battery, and the backup battery is used in parallel with the backup battery in the equipment room of the communication base station. 9. The communication base station power supply system according to claim 8, wherein, The backup battery is also electrically connected to the power supply bus, and the power supply bus is used to charge the backup battery. 10. The power supply system for a communication base station according to claim 9, characterized in that, The energy storage device further includes a second DC-DC converter, and the backup battery is electrically connected to the power supply bus through the second DC-DC converter.

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