WO2011124170A2

WO2011124170A2 - Communication power supply and control method thereof

Info

Publication number: WO2011124170A2
Application number: PCT/CN2011/073944
Authority: WO
Inventors: 黄恩伦; 安强新; 曹丰年
Original assignee: 华为技术有限公司
Priority date: 2011-05-11
Filing date: 2011-05-11
Publication date: 2011-10-13
Also published as: CN102217165A; WO2011124170A3

Abstract

The invention discloses communication power supply and a control method thereof. The method includes detecting AC input voltage of the communication power supply for a base station master device and a storage battery; according to the AC input voltage, adjusting power-supply current provided by the communication power supply for the storage battery to keep the AC input voltage of the communication power supply within the range of preset voltage. The embodiment of the invention can avoid the problem that the communication power supply is opened and closed frequently in the prior art.

Description

Communication power supply and control method thereof

The present invention relates to power supply technologies, and in particular, to a communication power supply and a control method thereof. Background technique

In a communication network, the communication base station is usually powered by the AC power grid through the communication power source, and the AC power supply is unstable and frequently interrupted. When the AC power supply is interrupted, the battery is used to supply power to the communication power supply. When the AC power supply returns to normal, the communication power supply needs to supply power to the base station main equipment on the one hand, and charge the battery on the other hand, and will be in the process of power supply or charging. The corresponding maximum current is used for power supply or charging. In order to improve communication coverage, the communication base station is generally selected at a higher location, which makes the transmission line between the AC grid and the communication power source longer, requiring multiple connections of the cable, so that the resistance of the transmission line is increased. When the resistance of the transmission line increases, the voltage drop caused by the transmission line increases, causing the input voltage of the communication power source to decrease, and the communication power supply to be turned off due to undervoltage. When the communication power supply stops the output current, the voltage drop caused by the resistance of the transmission line disappears, the input voltage of the communication power supply increases, and the communication power supply starts to work again, charging the base station main device and the battery.

Due to the frequent opening and closing of the communication power supply, the battery cannot be charged efficiently and in time, and eventually the battery and the communication power supply are damaged, and the communication of the base station is interrupted. Summary of the invention

Embodiments of the present invention provide a communication power supply and a control method thereof, which improve the adaptability of an AC power grid of a communication power source, and avoid frequent opening and closing of the communication power source.

An embodiment of the present invention provides a method for controlling a communication power supply, including:

Detecting an AC input voltage of the base station master device and the communication power source for supplying power to the battery; adjusting a supply current of the communication power source to the battery according to the AC input voltage, and maintaining an AC input voltage of the communication power source at a preset voltage Within the scope. An embodiment of the present invention provides a communication power supply, including:

a detecting module, configured to detect an AC input voltage of a communication power source that supplies power to the base station main device and the battery;

And an adjustment module, configured to adjust a supply current of the communication power source to the battery according to the AC input voltage, so that an AC input voltage of the communication power source is maintained within a preset voltage range.

It can be seen from the above technical solution that the embodiment of the present invention detects an AC input voltage when the communication power source outputs a current, and maintains the AC input voltage within a preset voltage range by adjusting the supply current to the battery, thereby forming an adaptive feedback system, thereby avoiding The sudden increase or decrease of the AC input voltage can avoid the problem that the communication power supply from the continuous supply of the maximum charging current to the battery is easily turned off in the prior art, and the frequent opening and closing of the communication power source is avoided. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, a brief description of the drawings to be used in the description of the embodiments will be briefly made. It is obvious that the drawings in the following description are some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.

1 is a schematic diagram of an AC input and a power supply output of a communication power supply according to an embodiment of the present invention; FIG. 2 is a schematic flowchart of a method according to a first embodiment of the present invention;

3 is a schematic flow chart of a method according to a second embodiment of the present invention;

4 is a schematic diagram of controlling an output current according to an AC input voltage according to a second embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a communication power supply according to a third embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is apparent that the described embodiments are a part of the embodiments of the invention, rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.

1 is a schematic diagram of an AC input and a power supply output of a communication power supply according to an embodiment of the present invention. Referring to FIG. 1, Vin is an AC voltage provided by an AC power grid, and R is a line resistance caused by a long transmission line or multiple times of cable connection, Vac For the AC input voltage of the communication power source 11, Imain indicates the current supplied by the communication power source 11 to the base station master device 12, and Ibattery indicates the power supplied by the communication power source 11 for the battery terminal 13;

2 is a schematic flow chart of a method according to a first embodiment of the present invention, including:

Step 21: detecting an AC input voltage of the communication power supply for the base station main device and the battery; for example, when the communication power supply is powered by the AC power grid, the power supply to the base station main device is on the one hand, the supply current is Imain, and the battery is charged and charged on the other hand. The current is Ibattery, at which time the communication power source also detects the AC input voltage Vac.

Step 22: The communication power source adjusts a supply current of the communication power source to the battery according to the AC input voltage, so that the AC input voltage is maintained within a preset voltage range.

For example, when the AC input voltage Vac decreases to a certain threshold, the supply current to the battery (specifically, the charging current Ibattery) is reduced, so that the voltage drop on the transmission line is reduced, and the Vac is increased; after the Vac is increased, Increase the charging current. Through this process, automatic adjustment is achieved, so that the Vac is kept within a certain range to avoid power interruption.

In this embodiment, an AC input voltage is detected when the communication power source outputs a current, and the AC input voltage is maintained within a preset voltage range by adjusting a supply current to the battery, thereby forming an adaptive feedback system to avoid a sudden increase of the AC input voltage or By reducing, the problem that the communication power source is easily turned off due to the continuous supply of the maximum charging current to the battery in the prior art can be avoided, and the frequent opening and closing of the communication power source can be avoided.

3 is a schematic flow chart of a method according to a second embodiment of the present invention, and FIG. 4 is a schematic diagram of controlling output current according to an AC input voltage according to a second embodiment of the present invention. Referring to FIG. 3, this embodiment includes:

Step 301: After the AC input voltage Vac recovers from the interrupt, it is detected whether the AC input voltage Vac is greater than the fourth voltage threshold Vac4 and continues for the first time threshold T1. If yes, step 302 is performed, otherwise step 301 and subsequent steps are repeated.

Step 302: Control the power of the base station master device to provide the base station master device with the current required to operate in the minimum power consumption mode.

After the AC power is restored from the interrupt, when the AC input voltage is greater than Vac4 and lasts for T4, it indicates that the AC input voltage is stable. The communication power supply provides the minimum power risk of the base station master device with the set Imain=I0.

10 is the minimum current required when the base station master works in the minimum power mode. This value can be configured according to the base station master device.

By setting this minimum supply current, you can achieve:

1) When the AC power recovers from the interruption, the base station master device is powered on in the minimum power consumption mode, at which time the communication power supply supplies the base station main equipment supply current (Imain) to a minimum.

2) When the AC power is restored from the interruption, the base station communication power supply does not charge the battery, and the battery charging current I_battery is 0.

Step 303: Detect whether the AC input voltage is greater than the first voltage threshold Vac and continue for the second time threshold T2. If yes, go to step 304. Otherwise, repeat step 302 and subsequent steps.

Step 304: The communication power supply charges the battery, and the charging current Ibattery gradually increases until the maximum charging power is at risk.

Wherein, when the AC input voltage Vac rises to the set value Vacc and continues for T2 time, it indicates that the AC input voltage rise has been relatively stable. At this time, the communication power source can gradually increase the battery charging current I_battery from 0, when the battery charging current The power system maintains this maximum charging current when the battery maximum charge I-battery-max is reached.

Step 305: Detect whether the charging current is maintained at the maximum charging current for a preset third time threshold T3. If yes, go to step 306, otherwise repeat step 304 and subsequent steps. Step.

Step 306: The communication power source notifies the base station master device to operate in the normal power consumption mode, and provides the base station master device with the current required to operate in the normal power consumption mode.

When the charging current is kept at the maximum charging current and the duration is T3, it means that the AC input voltage is normal after the AC recovery. At this time, the communication power source can notify the base station master device that the power supply works normally, and the base station master device can work in the normal power consumption mode. The power-on control process ends.

Referring to Figure 4, the base station master can delay operation in the normal power mode.

Step 307: Detect whether the AC input power supply Vac is less than the second voltage threshold Vac2, and if yes, go to step 308, otherwise repeat step 304 and subsequent steps.

Step 308: The communication power source adjusts the charging current of the battery so that the AC input power source is maintained between the second voltage threshold Vac2 and the third voltage threshold Vac3.

During the control of steps 304 and 306, the AC input voltage Vac is simultaneously detected. When the voltage drop across the resistor R in the line increases, the AC input voltage Vac decreases, and when Vac is lower than the set value Vac2 (eg, less than the rated voltage) 20%), the communication power supply gradually reduces the battery charging current I-battery. When Vac is lower than the set value Vac3 (if less than 30% of the rated voltage), adjust the battery charging current I-battery becomes 0, and the AC input voltage is in Vac2 ~ Vac3. Linear interpolation can be used to adjust the battery charging current. This results in an adaptive feedback system that allows the AC input voltage to be in Vac2 ~ Vac3.

Step 309: Detect whether the AC input voltage is less than the third voltage threshold Vac3. If yes, go to step 310. Otherwise, repeat step 308 and subsequent steps.

Step 310: The communication power is turned off, the battery is powered by the base station master device, and the communication power source notifies the base station master device to resume from the normal power consumption mode to the minimum power consumption mode.

In the initial state of power-on, the power consumption of the main device is in the minimum power consumption mode and the battery is not charged, the inrush current during the startup is reduced, and the adaptability of the communication power source to the power grid is improved; The charging current can automatically adjust the charging current of the power source to the battery, and improve the adaptability of the power source to the power grid. In this embodiment, after the power-on adjustment and balance, the base station master device is notified to work in the normal working mode, and the master device delays the normal working mode. , improve the base station system to the grid Adaptability; This embodiment can be applied to the power-on power-on control phase, and can also be applied to the power supply operation automatic adjustment tracking phase to improve the adaptability of the base station system to the power grid; in this embodiment, the charging current of the battery is adjusted according to the AC input voltage. The control algorithm adds a hysteresis design; all the parameters in the control process in this embodiment are configurable, and the adaptability is increased.

FIG. 5 is a schematic structural diagram of a communication power supply according to a third embodiment of the present invention, including a detection module 51 and an adjustment module 52. The detection module 51 is configured to detect an AC input voltage of a communication power supply for a base station main device and a battery; Adjusting a supply current of the communication power source to the battery according to the AC input voltage, so that an AC input voltage of the communication power source is maintained within a preset voltage range.

The adjusting module 52 may be specifically configured to: if the AC input voltage is less than a preset second voltage threshold, gradually reduce the power supply current until the AC input voltage is equal to a preset third voltage threshold The supply current is reduced to 0, wherein the third voltage threshold is less than the second voltage threshold.

The embodiment may further include: an initial power supply module, configured to control the communication power source when the AC input voltage returns from being interrupted to be greater than a preset fourth voltage threshold and maintaining a preset first time threshold The base station master device provides an initial output current, which is a current required when the base station master device operates in a minimum power consumption mode; when the AC input voltage returns to a preset first voltage threshold and remains pre- When the second time threshold is set, the communication power source is controlled to supply a supply current to the battery, and the supply current is gradually increased until a maximum charging current; when the charging current is maintained at the maximum charging current, the preset time is reached. The three-time threshold enables the base station master to operate in a normal power consumption mode, and provides the base station master with a supply current required to operate in a normal power consumption mode through the communication power source.

The embodiment may further include: a shutdown module, configured to control the communication voltage to turn off the output current if the AC input voltage is less than the third voltage threshold, and supply power to the base station master device by the battery.

The embodiment may further include: a notification module, configured to: when the battery is the base station master device When the power is supplied, the base station master device is restored from the normal power consumption mode to the minimum power consumption mode, for example, sending a notification message to the base station master device, and the base station master device recovers from the normal power consumption mode to the minimum power consumption after receiving the notification message. mode.

It can be understood that related features in the above methods and devices can be referred to each other. In addition, "first", "second", and the like in the above embodiments are used to distinguish the embodiments, and do not represent the advantages and disadvantages of the embodiments.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions. The foregoing program may be stored in a computer readable storage medium, and when executed, the program includes The foregoing steps of the method embodiment; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

A control method for a communication power supply, comprising:

Detecting an AC input voltage of the base station master device and the communication power source for supplying power to the battery; adjusting a supply current of the communication power source to the battery according to the AC input voltage, and maintaining an AC input voltage of the communication power source at a preset voltage Within the scope.

2. The method according to claim 1, wherein the adjusting a supply current of the communication power source to the battery according to the AC input voltage, and maintaining an AC input voltage of the communication power source at a preset voltage Within the scope, including:

If the AC input voltage is less than a preset second voltage threshold, gradually reducing the supply current until the AC input voltage is equal to a preset third voltage threshold, the supply current is reduced to 0, The third voltage threshold is less than the second voltage threshold.

3. The method according to claim 1, further comprising:

Controlling the communication power source to provide an initial output current to the base station master device when the AC input voltage returns from being interrupted to be greater than a preset fourth voltage threshold and maintaining a preset first time threshold, the initial output The current is a current required when the base station master device operates in a minimum power consumption mode; and when the AC input voltage returns to a preset first voltage threshold and maintains a preset second time threshold, the communication power is controlled Supplying a supply current to the battery, the supply current is gradually increased until a maximum charging current;

When the power supply current is maintained at the maximum charging current for a preset third time threshold, the base station master device is operated in a normal power consumption mode, and the base station master device is provided by the communication power source. Supply current required for operation in normal power mode.

4. The method according to claim 2, further comprising:

And if the AC input voltage is less than the third voltage threshold, controlling the communication voltage to turn off an output current, and the battery is powered by the base station master device.

5. The method according to claim 4, further comprising:

When the battery is powered by the base station master device, causing the base station master device to receive normal power consumption The mode is restored to the minimum power mode.

6. A communication power supply, comprising:

The communication power supply according to claim 6, wherein the adjustment module is specifically configured to: if the AC input voltage is less than a preset second voltage threshold, gradually reduce the supply current until when When the AC input voltage is equal to a preset third voltage threshold, the supply current is reduced to 0, wherein the third voltage threshold is less than the second voltage threshold.

8. The communication power supply of claim 6, further comprising:

An initial power supply module, configured to: when the AC input voltage recovers from being interrupted to be greater than a preset fourth voltage threshold and maintaining a preset first time threshold, controlling the communication power source to provide an initial output for the base station master device Current, the initial output current is a current required when the base station master operates in a minimum power consumption mode; when the AC input voltage returns to a preset first voltage threshold and maintains a preset second time threshold Controlling the communication power supply to supply a supply current to the battery, the supply current is gradually increased until a maximum charging current; when the supply current is maintained at a maximum charging current for a preset third time threshold, The base station master device operates in a normal power consumption mode, and provides the base station master device with a supply current required to operate in a normal power consumption mode through the communication power source.

9. The communication power supply of claim 7, further comprising:

And a shutdown module, configured to control the communication voltage to turn off an output current if the AC input voltage is less than the third voltage threshold, and supply power to the base station host device by the battery.

10. The communication power supply of claim 9, further comprising:

And a notification module, configured to restore the base station master device from a normal power consumption mode to a minimum power consumption mode when the battery is powered by the base station master device.