CN112713622A - Power supply method, device and base station - Google Patents
Power supply method, device and base station Download PDFInfo
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- CN112713622A CN112713622A CN201911026169.3A CN201911026169A CN112713622A CN 112713622 A CN112713622 A CN 112713622A CN 201911026169 A CN201911026169 A CN 201911026169A CN 112713622 A CN112713622 A CN 112713622A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
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Abstract
The embodiment of the invention discloses a power supply method, a power supply device and a base station, wherein the power supply device comprises a rectifying device, a control device and a battery, wherein: the rectifying device is used for converting input alternating current into direct current; the control device is coupled with the rectifying device and used for controlling the direct current and the battery to supply power to the load under the condition that the power of the load is greater than or equal to a first threshold value; and the control device is also used for controlling the direct current to supply power to the load under the condition that the power of the load is less than the first threshold value. According to the embodiment of the invention, under the condition that the required power of the equipment is larger, the equipment can be normally powered.
Description
Technical Field
The embodiment of the invention relates to the technical field of electronic circuits, in particular to a power supply method, a power supply device and a base station.
Background
The power supply device is an essential component for various equipment to work normally. In general, the power supply device can normally supply power to the equipment. However, in a case where power consumption required by the device powered by the power supply apparatus is large, the power supply apparatus may not be able to supply power to the device so that the device operates normally. Therefore, under the condition that the power required by the equipment is large, how to ensure the normal power supply of the equipment becomes a technical problem to be solved urgently.
Disclosure of Invention
The embodiment of the invention discloses a power supply method, a power supply device and a base station, which are used for ensuring normal power supply for equipment under the condition of larger power required by the equipment.
A first aspect discloses a power supply device comprising rectifying means for converting an input alternating current into a direct current, control means coupled to the rectifying means for controlling the direct current and the battery to power a load if a power of the load is greater than or equal to a first threshold, and a battery for controlling the direct current to power the load if the power of the load is less than the first threshold. Therefore, under the condition that the power required by the equipment is small, the commercial power is used for supplying power to the equipment, and under the condition that the power required by the equipment is large, the commercial power and the battery are used for supplying power to the equipment together, so that the condition that the commercial power is insufficient due to the large power required by the equipment can be avoided, and the normal power supply can be realized for the equipment.
As a possible implementation, the power of the load is greater than or equal to the first threshold, which may be that the current of the alternating current is greater than or equal to the second threshold, and it may be determined that the power required by the device is greater by the current of the commercial power being greater than or equal to one threshold.
As a possible embodiment, the power of the load is greater than or equal to the first threshold, which may be that the power of the alternating current is less than or equal to the ratio of the sum of the maximum power of the load and the charging power of the battery to the first conversion efficiency, and the power required by the device may be determined to be greater by the power of the utility power, the power of the load of the device, and the charging power of the battery.
As a possible embodiment, the power of the load is greater than or equal to the first threshold, which may be a ratio of a maximum power of the load to a charging power of the battery to the second conversion efficiency, a minimum voltage of the alternating current, and the number of phases of the alternating current, and the power required by the device may be determined to be larger by the idle current of the utility power, the power of the device load, the charging power of the battery, the voltage of the utility power, and the number of phases of the utility power (or the transformer).
As a possible embodiment, the control device controls the dc power and the battery to supply power to the load, and may adjust the output voltage of the rectifying device according to the voltage of the battery, so as to ensure that the voltage of the battery and the output voltage of the rectifying device are the same.
As a possible implementation manner, the power supply device further includes an air conditioner, and the control device, coupled to the air conditioner, is further configured to control the air conditioner to shut down if the power of the load is greater than or equal to a first threshold and the temperature of the environment is less than a third threshold, and is further configured to control the air conditioner to start up if the temperature of the environment is greater than a fourth threshold, where the third threshold is less than the fourth threshold. Under the condition that the mains supply power is insufficient and the ambient temperature is low, the air conditioner is turned off, the mains supply power can be saved for equipment power supply, and the equipment can be further normally powered.
As a possible implementation manner, the power supply device further includes a temperature sensor, the control device is coupled to the temperature sensor, and is further configured to acquire the temperature of the environment through the temperature sensor, so that the temperature of the environment can be monitored in real time, and when the mains power is insufficient, the air conditioner is turned off when the temperature is allowed, so that the mains power can be saved and the power is used for supplying power to the equipment.
As a possible embodiment, the control device controls the direct current and the battery to supply power to the load in a case where the power of the load is greater than or equal to a first threshold, and may control the direct current and the battery to supply power to the load in a case where the power of the alternating current is greater than or equal to the sum of the average power of the load and the power of the air conditioner, the maximum power of the load is less than or equal to the sum of the power of the alternating current and the discharge power of the battery, and the power of the load is greater than or equal to the first threshold. The power supply device can ensure that the power supply for the equipment is available by using the commercial power and the battery, so that the power supply for the equipment can be jointly carried out by using the commercial power and the battery under the condition of larger power required by the equipment, the condition that the commercial power is insufficient due to larger power required by the equipment can be avoided, and the normal power supply for the equipment can be realized.
The second aspect discloses a power supply method, which is applied to a power supply device, wherein the power supply device comprises a rectifying device, a control device and a battery, alternating current can be converted into direct current through the rectifying device, the direct current and the battery can be controlled by the control device to supply power to a load in the case that the power of the load is greater than or equal to a first threshold value, and the direct current can be controlled by the control device to supply power to the load in the case that the power of the load is less than the first threshold value. Therefore, under the condition that the power required by the equipment is small, the commercial power is used for supplying power to the equipment, and under the condition that the power required by the equipment is large, the commercial power and the battery are used for supplying power to the equipment together, so that the condition that the commercial power is insufficient due to the large power required by the equipment can be avoided, and the normal power supply can be realized for the equipment.
As a possible implementation, the power of the load is greater than or equal to the first threshold, which may be that the current of the alternating current is greater than or equal to the second threshold, and it may be determined that the power required by the device is greater by the current of the commercial power being greater than or equal to one threshold.
As a possible embodiment, the power of the load is greater than or equal to the first threshold, which may be that the power of the alternating current is less than or equal to the ratio of the sum of the maximum power of the load and the charging power of the battery to the first conversion efficiency, and the power required by the device may be determined to be greater by the power of the utility power, the power of the load of the device, and the charging power of the battery.
As a possible embodiment, the power of the load is greater than or equal to the first threshold, which may be a ratio of a maximum power of the load to a charging power of the battery to the second conversion efficiency, a minimum voltage of the alternating current, and the number of phases of the alternating current, and the power required by the device may be determined to be larger by the idle current of the utility power, the power of the device load, the charging power of the battery, the voltage of the utility power, and the number of phases of the utility power (or the transformer).
As a possible embodiment, the dc power and the battery are controlled by the control device to supply power to the load, and the output voltage of the rectifying device can be adjusted by the control device according to the voltage of the battery, so that the voltage of the battery and the output voltage of the rectifying device can be ensured to be the same.
As a possible implementation manner, the power supply device further includes an air conditioner, the air conditioner may be controlled to be turned off by the control device in a case where the power of the load is greater than or equal to the first threshold and the temperature of the environment is less than a third threshold, and the air conditioner may be controlled to be turned on by the control device in a case where the temperature of the environment is greater than a fourth threshold, and the third threshold is less than the fourth threshold. Under the condition that the mains supply power is insufficient and the ambient temperature is low, the air conditioner is turned off, the mains supply power can be saved for equipment power supply, and the equipment can be further normally powered.
As a possible implementation manner, the power supply device further includes a temperature sensor, the temperature of the environment can be obtained through the temperature sensor, the temperature of the environment can be monitored in real time, and when the mains power is insufficient, the air conditioner is turned off when the temperature is allowed, so that the mains power can be saved for supplying power to the equipment.
As a possible embodiment, in the case that the power of the load is greater than or equal to the first threshold, the controlling the direct current and the battery to supply power to the load may be performed in the case that the power of the alternating current is greater than or equal to the sum of the average power of the load and the power of the air conditioner, the maximum power of the load is less than or equal to the sum of the power of the alternating current and the discharge power of the battery, and the power of the load is greater than or equal to the first threshold. The power supply device can ensure that the power supply for the equipment is available by using the commercial power and the battery, so that the power supply for the equipment can be jointly carried out by using the commercial power and the battery under the condition of larger power required by the equipment, the condition that the commercial power is insufficient due to larger power required by the equipment can be avoided, and the normal power supply for the equipment can be realized.
Drawings
FIG. 1 is a schematic diagram of an application scenario disclosed in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a power supply device disclosed in the embodiment of the invention;
FIG. 3 is a schematic view of a control device according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating a power supply method according to an embodiment of the present invention;
FIG. 5 is a schematic flow chart illustrating another power supply method disclosed in the embodiments of the present invention;
fig. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention discloses a power supply method, a power supply device and a base station, which are used for ensuring normal power supply for equipment under the condition of larger power required by the equipment. The following are detailed below.
In order to better understand a power supply method, a power supply device and a base station disclosed in the embodiments of the present invention, an application scenario of the embodiments of the present invention is described below. Referring to fig. 1, fig. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention. As shown in fig. 1, the application scenario may include a utility power 101, a base station 102, and a communication device 103. And the commercial power 101 is used for supplying power to the base station 102. A base station 102 for communicating with a communication device 103. The mains 101 may comprise a transformer, a mains line and a distribution air switch. And the transformer is used for adjusting voltage. And the commercial power line is used for transmitting the electricity regulated by the transformer to the distribution air switch. The power distribution is switched off and is used to control the transformer to supply power to the base station 102. The base station 102 may include a power supply means for supplying power to a communication means; the communication means is used for communicating with the communication device 103. The communication device 103 comprises communication means for communicating with the base station 102.
With the arrival of the 5G era, the power required by the base station is doubled, that is, the power required by the base station is doubled, so that a large number of mains transformers, mains lines, distribution switches and the like of the base station, that is, the mains 101, have to be upgraded and modified so as to meet the power requirement of the base station. In some scenes, the commercial power is not in a state of insufficient power for a long time, and only in the peak time of communication every day, the power required by the base station is increased, so that the situation of insufficient commercial power occurs. At present, a battery of a base station is used as a backup of mains supply, the mains supply supplies power to the base station when the mains supply is normal, the battery is in a non-discharge state, the mains supply cannot supply power when the mains supply fails, and the battery is in a discharge state, so that the base station is ensured not to be powered off. Therefore, how to normally supply power to the base station according to the commercial power and the battery becomes a technical problem to be solved urgently during the communication peak period.
In addition, the power supply method, the power supply device and the base station disclosed by the embodiment of the invention can be applied to other equipment which can be powered by mains supply and is provided with a battery besides the application scene. The battery may be a backup battery for supplying power to the device, or may be a battery for other purposes, and is not limited herein.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a power supply device according to an embodiment of the present invention. As shown in fig. 2, the power supply device may include a rectifying device, a control device, and a battery, wherein:
the rectifying device is used for converting input alternating current into direct current;
the control device is coupled with the rectifying device and used for controlling the direct current and the battery to supply power to the load under the condition that the power of the load is greater than or equal to a first threshold value;
and the control device is also used for controlling the direct current to supply power to the load under the condition that the power of the load is less than the first threshold value.
The early battery is a lead-acid storage battery, which is expensive and has low cycle times, so that a user hopes that the battery participates in power supply as little as possible, and only under the condition of mains supply power failure can discharge to ensure that the load does not lose power. Based on the existing base station technology, when the power required by the base station is doubled and prolonged, the commercial power needs to be transformed, otherwise, the commercial power is insufficient in the peak period of power utilization, and the power cannot be supplied, and only the battery can be used for supplying power. At the moment, the battery must be configured according to the maximum power of the load, not only the duration of the peak period of power utilization but also the duration of the standby power during the power failure of the commercial power need to be considered, which greatly increases the configuration capacity of the battery, so that the battery is difficult to apply in the actual engineering, and the commercial power transformation has to be carried out. With the continuous maturity of lithium battery technology and the continuous reduction of price, it is a trend that the batteries can adopt lithium batteries, and the cycle number of the lithium batteries is several times of that of lead-acid storage batteries, and the cycle number is not a main problem of the service life of the batteries. Therefore, the utility power and the battery can participate in power supply at the same time through certain control logic and algorithm in the peak period of power utilization, so that the battery can be used for making up the deficiency of the utility power, and meanwhile, because the utility power and the battery supply power at the same time, the battery does not need to be configured according to the maximum power of the load, thereby avoiding the upgrading and reconstruction of the utility power.
The rectifying device can convert the input alternating current into direct current, namely commercial power. The rectifying means may comprise at least one (i.e. one or more) rectifying module, which may be all the same, part of the same or all the different.
The control device may control the direct current and the battery to supply the load in a case where the power of the load is greater than or equal to a first threshold value, and control the direct current to supply the load in a case where the power of the load is less than the first threshold value. Specifically, the control device may monitor the power of the load in real time, and determine whether the power of the load is greater than or equal to (or greater than) a first threshold, and in a case where the power of the load is determined to be greater than or equal to (or greater than) the first threshold, the control device may control the direct current and the battery to supply power to the load, and in a case where the power of the load is less than (or less than or equal to) the first threshold, the control device controls the direct current to supply power to the load. In the peak period of power utilization, the utility power and the battery can be used for simultaneously supplying power, so that the load can be ensured not to be powered off, namely the equipment can be ensured to normally work; in the off-peak period of power utilization, the commercial power can be used for power supply, and the power supply times of the battery can be reduced. In addition, in the off-peak period of power consumption, that is, in the case that the power of the load is less than the first threshold, it can be detected whether the current electric quantity of the battery is equal to the maximum electric quantity of the battery, and in the case that the current electric quantity of the battery is less than the maximum electric quantity of the battery, the battery can be charged by using direct current, that is, the battery is charged, so as to ensure that the battery can have enough current to supply power to the load in the power failure of the commercial power or the next peak period of power consumption, thereby ensuring that the load does not power down.
In one embodiment, the power of the load being greater than or equal to the first threshold comprises:
the current of the alternating current is greater than or equal to a second threshold value.
The device may be provided with control means such as a peak shifting power switch, push button or the like which may be turned on by the user after the device has been configured or in the event that the user needs to use the device. After the control part is switched on, the device can use the function of off-peak power supply, namely the device can use commercial power and a battery to supply power together in the peak period of power utilization, and can use the commercial power to supply power in the non-peak period of power utilization. After the control unit has been switched on, the control device can calculate a second threshold value, i.e. the maximum ac input current I of the rectifier devicemax，ImaxIs MIN (I)1,I2) N, i.e. I1And I2Ratio of the minimum value of (d) to N. I is1The current limit of each phase of the transformer is calculated according to the open current of the alternating current, and can be a product of the open current of the alternating current and a first derating coefficient. The first derating factor may be a value between 0 and 1, and may be 0.8, or may be other values. I is2The current limit of each phase of the transformer calculated according to the current of the alternating current may be a product of the current of the alternating current and a second derating factor. The second derating factor may be a value between 0 and 1, may be 0.8, or may be another value. The first derating coefficient and the second derating coefficient may be the same or different. And N is the number of the rectifying modules in the rectifying device. Relevant information that the on-air current of the alternating current, the number of the rectification modules and the like are fixed can be stored in the device. The information may be input by the user, sent to the device by another device, or obtained by the device from another device. Calculate ImaxThereafter, the control device may monitor the current of the alternating current when the current of the alternating current is greater than or equal to (or greater than) ImaxWhen the load needs a large power, the situation that the power of the mains supply is insufficient may occur, and the control device can control the direct current and the battery to supply power to the load. When the current of the alternating current is less than (or less than or equal to) ImaxThe time shows that the power required by the load is small, the power of the commercial power is sufficient, and the control device can control the direct current to supply power to the loadAnd (4) electricity.
In one embodiment, the power of the load being greater than or equal to the first threshold comprises:
the power of the alternating current is less than or equal to a ratio of a sum of a maximum power of the load and a charging power of the battery to the first conversion efficiency.
After the control component is turned on, the control device may monitor the power of the load, and may further determine whether the power of the alternating current is less than or equal to (or less than) a ratio of a sum of a maximum power of the load and a charging power of the battery to the first conversion efficiency, and when the power of the alternating current is less than or equal to (or less than) a ratio of a sum of a maximum power of the load and a charging power of the battery to the first conversion efficiency, it indicates that the power required by the load is large, and there is a possibility that the commercial power is insufficient, and the control device may control the direct current and the battery to supply power to the. When the power of the alternating current is greater than (or greater than or equal to) the ratio of the sum of the maximum power of the load and the charging power of the battery to the first conversion efficiency, the load requires less power, the commercial power is sufficient, and the control device can control the direct current to supply power to the load. The ratio of the power of the alternating current to the first conversion efficiency to the sum of the maximum power of the load and the charging power of the battery may be expressed as follows:
Pcommercial power≤[PPeak load+PBattery charging]/X
PCommercial powerIs the power of alternating current, namely the power of commercial power. PPeak loadThe maximum power of the load, that is, the peak power of the load, that is, the maximum power of the load in a period of time, where the period of time may be one week, one month, or another value. X is the first conversion efficiency, and may be 0.9, a value between 0 and 1, or other values. PBattery chargingThe charging power for the battery can be expressed as follows:
Pbattery charging＝1-SSOC*CBattery with a battery cell*B*D
SSOCFor a coefficient indicating whether or not the battery is fully charged, when the battery is fully charged, SSOC1, when the battery is not fully charged, i.e. is deficient, SSOCIs 0. CBattery with a battery cellThe rated capacity of the battery is A/hour. B is a charge coefficient, and may be 0.15, a value between 0 and 1, or another value. D is the battery's average charging voltage, which may be 56.4 or some other value. PBattery chargingThe maximum charging power of the battery may be, the average charging power of the battery may be, or other charging powers of the battery may be, but is not limited to this.
In one embodiment, the power of the load being greater than or equal to the first threshold comprises:
the open current of the alternating current is less than or equal to a ratio of a sum of a maximum power of the load and a charging power of the battery to the second conversion efficiency, a minimum voltage of the alternating current, and the number of phases of the alternating current.
After the control component is turned on, the control device can monitor the power of the load, and can also judge whether the open current of the alternating current is smaller than or equal to (or smaller than) the ratio of the sum of the maximum power of the load and the charging power of the battery to the second conversion efficiency, the minimum voltage of the alternating current and the number of phases of the alternating current, and when the open current of the alternating current is smaller than or equal to (or smaller than) the ratio of the sum of the maximum power of the load and the charging power of the battery to the second conversion efficiency, the minimum voltage of the alternating current and the number of phases of the alternating current, the control device can control the direct current and the battery to supply power to the load, and the situation that the power needed by the load is. When the open current of the alternating current is larger than (or larger than or equal to) the ratio of the sum of the maximum power of the load and the charging power of the battery to the second conversion efficiency, the minimum voltage of the alternating current and the number of phases of the alternating current, the power required by the load is small, the commercial power is sufficient, and the control device can control the direct current to supply power to the load. The ratio of the sum of the maximum power of the load and the charging power of the battery to the second conversion efficiency, the minimum voltage of the alternating current, and the number of phases of the alternating current may be expressed as follows:
Iair switch≤[PPeak load+PBattery charging]/Y*Z*W
IAir switchThe current is switched on for the alternating current. Y is a second conversion efficiencyThe value is between 0 and 1, and may be 0.9, or may be other values. X and Y may be the same or different. Z is the lowest voltage of the alternating current, and may be 176 or other values. W is the number of phases of the transformer.
In one embodiment, the controlling means controlling the dc power and the battery to power the load comprises:
the control device adjusts the output voltage of the rectifying device according to the voltage of the battery.
In the case where the power of the load is greater than or equal to (or greater than) the first threshold, the control device may control the dc power and the battery to supply power to the load, and the control device may adjust the output voltage of the rectifying device according to the voltage of the battery, so that it may be ensured that the voltage of the battery remains the same as the output voltage of the rectifying device, and thus the load may be supplied with the dc power and the battery in common.
In one embodiment, the power supply device further comprises an air conditioner, wherein:
the control device is coupled with the air conditioner and is also used for controlling the air conditioner to be shut down under the conditions that the power of the load is greater than or equal to a first threshold value and the temperature of the environment is less than a third threshold value;
and the control device is also used for controlling the air conditioner to start under the condition that the temperature of the environment is greater than a fourth threshold value, and the third threshold value is smaller than the fourth threshold value.
In order to keep the equipment working normally, the temperature of the environment where the power supply device is located cannot be too high, and therefore, the power supply device is provided with an air conditioner so that the power supply device can supply power to the equipment normally. However, in the case of a low ambient temperature, the operation of the power supply device is not affected by the non-operation of the air conditioner. Therefore, when the power of the load is greater than or equal to (or greater than) the first threshold and the temperature of the environment is less than the third threshold, which indicates that the commercial power is insufficient and the ambient temperature is low, the control device may control the air conditioner to shut down, and may reduce the consumption of the commercial power by the air conditioner, so as to use the saved commercial power for the equipment power supply, and at the same time, may increase the power supply capacity of the direct current, and reduce the discharge capacity of the battery. Under the condition that the temperature of the environment is higher than the fourth threshold value, the ambient temperature is higher, the control device can control the air conditioner to be started so as to reduce the temperature of the environment, and the situation that the power supply device cannot supply power due to overhigh temperature can be avoided. Wherein the third threshold is smaller than the fourth threshold, for example, the third threshold may be 40 ℃, and the fourth threshold may be 50 ℃. The control device may communicate with the air conditioner or the air conditioner controller through a protocol, for example, the control device may send an instruction to the air conditioner through the protocol, such as a shutdown instruction for shutting down the air conditioner, a startup instruction for turning on the air conditioner, and the like, so that the control device may acquire an operation state of the air conditioner in real time and may control the on/off of the air conditioner. The air conditioner may be a dc air conditioner, where the air conditioner is powered by dc power, i.e. the air conditioner is coupled to a rectifying device. The air conditioner can also be an alternating current air conditioner, and the air conditioner is powered by alternating current at the moment.
In one embodiment, the power supply further comprises a temperature sensor, wherein:
and the control device is coupled with the temperature sensor and is also used for acquiring the temperature of the environment through the temperature sensor.
The control device can be connected with the temperature sensor so as to detect the temperature of the environment where the power supply device is located in real time and control the on or off of the air conditioner according to the temperature of the environment.
In one embodiment, the control device for controlling the direct current and the battery to supply power to the load when the power of the load is greater than or equal to the first threshold value comprises:
and controlling the direct current and the battery to supply power to the load under the conditions that the power of the alternating current is greater than or equal to the average power of the load, the maximum power of the load is less than or equal to the sum of the power of the alternating current and the discharge power of the battery, and the power of the load is greater than or equal to a first threshold value.
Specifically, after the control means is turned on, it may be determined whether the power of the alternating current is greater than or equal to (or greater than) the sum of the average power of the load and the power of the air conditioner and whether the maximum power of the load is less than or equal to (or less than) the sum of the power of the alternating current and the discharge power of the battery, and the device may use the function of peak-shifted power supply in the case where it is determined that the power of the alternating current is greater than or equal to (or greater than) the sum of the average power of the load and the power of the air conditioner and that the maximum power of the load is less than or equal to (or less than) the sum of the power of. It may then be determined whether the power of the load is greater than or equal to (or greater than) the first threshold. The power of the alternating current being greater than or equal to the sum of the average power of the load and the power of the air conditioner, and the maximum power of the load being less than or equal to the sum of the power of the alternating current and the discharge power of the battery may be expressed as follows:
Pcommercial power≥PAverage load+PAir conditionerAnd P isPeak load≤PPeak load+PDischarging of battery
PAverage loadThe average power of the load is the average value of the power of the load over a period of time, which may be one week, one month, or some other value. PAir conditionerIs the power of the air conditioner. PDischarging of batteryThe discharge power of the battery can be the discharge power of the battery in a period of time, or the average discharge power of the battery in a period of time, and the period of time can be 10 hours, or other values. PDischarging of batteryThe maximum discharge power of the battery, the average discharge power of the battery, or other discharge powers of the battery may be used, and the present invention is not limited thereto.
In one embodiment, the power supply further comprises an alternating current device. And the alternating current device is coupled with the control device and the rectifying device and can send the alternating current to the rectifying device, namely, the alternating current device is responsible for the access of commercial power and the distribution of alternating current output. The alternating current device can also perform alternating current lightning protection and alternating current overcurrent protection.
In one embodiment, the power supply further comprises a dc device. And the direct current device is coupled with the rectifying device, the battery and the control device, and can send the direct current to the load, namely, the direct current device is responsible for direct current output distribution. The direct current device can also be used for direct current overcurrent protection and direct current lightning protection.
In the case where the air conditioner is a dc air conditioner, the air conditioner is coupled with a dc device. In the case where the air conditioner is an ac air conditioner, the air conditioner is coupled to an ac device.
In one embodimentIn the power supply process of the power supply device, if the load needs to be expanded, the available power P of the load is expandedCan be usedCan be expressed as follows:
Pcan be used＝PRectifying current+PDischarging of battery-PPeak load
PRectifying current＝URectifying current*IRectifying current*N
PDischarging of battery＝UBattery with a battery cell*IBattery with a battery cell*M
PRectifying currentIs the output power of the rectifying device, i.e. the sum of the output powers of all the rectifying modules comprised by the rectifying device. PDischarging of batteryIs the discharge power of the battery, i.e. the sum of the discharge powers of all battery packs comprised by the battery. U shapeRectifying currentIs the rated output voltage of the rectifying device. I isRectifying currentIs the rated output current of the rectifying device. U shapeBattery with a battery cellIs the rated output voltage of the battery. I isBattery with a battery cellThe rated output current of the battery. M is the number of battery packs included in the battery.
The control device may detect outputs of the ac device, the rectifying device, and the dc device through a protocol such as a Controller Area Network (CAN) protocol, and may control an increase or decrease of an output voltage of the rectifying device.
Referring to fig. 3, fig. 3 is a schematic diagram of a working flow of a control device according to an embodiment of the present invention. As shown in fig. 3, the off-peak power supply function may be turned on. The off-peak power supply function can be started according to the operation of a user. The user can press the control part, slide control part etc. and operate to input the opening instruction that is used for opening off-peak power supply function to power supply unit, and power supply unit can open off-peak power supply function according to opening the instruction after receiving the opening instruction of user input. After the off-peak power supply function is started, I can be calculated according to the idle opening current of the commercial power and the current of the commercial power recorded by the power supply equipment of the power supply devicemax. Calculate ImaxThen, the input current of the rectifying device can be monitored in real time, namely the current of the alternating current is monitored in real time, namely the input current of the commercial power is monitored in real time, and whether the current of the alternating current is larger than (or not) is judgedGreater than or equal to) Imax. When the current of the alternating current is judged to be larger than (or larger than or equal to) ImaxThe output power of the rectifying means may be limited and the output voltage of the rectifying means may be made to follow the battery voltage, thereby controlling the dc power and the battery to power the load. When the current of the alternating current is judged to be less than or equal to (or less than) ImaxIn the case of (2), the direct current is controlled to supply power to the load, and then whether the current of the alternating current is greater than (or greater than or equal to) I is continuously judgedmax. When the current of the alternating current is judged to be less than or equal to (or less than) ImaxAnd when the battery power is not full, the battery can be charged. In the process of controlling the direct current and the battery to supply power to the load, whether the temperature of the air conditioner is smaller than a third threshold value or not can be judged, the air conditioner is turned off under the condition that the temperature of the environment is judged to be smaller than (or smaller than or equal to) the third threshold value, and then whether the current of the alternating current is larger than (or larger than or equal to) I or not is continuously judgedmax. And turning on the air conditioner when the temperature of the environment is judged to be greater than or equal to (or greater than) the fourth threshold value.
Referring to fig. 4, fig. 4 is a schematic flow chart illustrating a power supply method according to an embodiment of the present invention. The power supply method is applied to a power supply device, and the power supply device can comprise a rectifying device, a control device and a battery. As shown in fig. 4, the power supply method may include the following steps.
401. The alternating current is converted into direct current through a rectifying device.
402. And controlling the direct current and the battery to supply power to the load through the control device under the condition that the power of the load is greater than or equal to the first threshold value.
In one embodiment, the power of the load is greater than or equal to (or greater than) the first threshold, and the current of the alternating current is greater than or equal to (or greater than) the second threshold.
In one embodiment, the power of the load is greater than or equal to the first threshold, and may be a ratio of the power of the alternating current to a ratio of a sum of a maximum power of the load and a charging power of the battery to the first conversion efficiency.
In one embodiment, the power of the load is greater than or equal to the first threshold, and may be a ratio of a sum of a maximum power of the load and a charging power of the battery to the second conversion efficiency, a minimum voltage of the alternating current, and the number of phases of the alternating current.
In one embodiment, the dc power and the battery are controlled by a control device to power the load, and the output voltage of the rectifying device may be adjusted by the control device according to the voltage of the battery.
In one embodiment, the controlling the dc power and the battery to supply power to the load may be performed in a case where the power of the load is greater than or equal to a first threshold, and the controlling the dc power and the battery to supply power to the load may be performed in a case where the power of the ac power is greater than or equal to a sum of an average power of the load and a power of the air conditioner, a maximum power of the load is less than or equal to a sum of a power of the ac power and a discharge power of the battery, and the power of the load is greater than or equal to the first threshold.
403. And controlling the direct current to supply power to the load through the control device under the condition that the power of the load is less than the first threshold value.
For detailed descriptions of steps 401 to 403, reference may be made to the corresponding descriptions above, which are not limited herein.
Referring to fig. 5, fig. 5 is a schematic flow chart illustrating another power supply method according to an embodiment of the disclosure. The power supply method is applied to a power supply device, and the power supply device can comprise a rectifying device, a control device, a battery, an air conditioner and a temperature sensor. As shown in fig. 5, the power supply method may include the following steps.
501. The alternating current is converted into direct current through a rectifying device.
502. It is determined whether the power of the load is greater than or equal to (or greater than) the first threshold, and if it is determined that the power of the load is greater than or equal to (or greater than) the first threshold, step 503 is performed, and if it is determined that the power of the load is less than the first threshold, step 505 is performed.
503. The direct current and the battery are controlled by the control device to supply power to the load.
In one embodiment, the power of the load is greater than or equal to (or greater than) the first threshold, and the current of the alternating current is greater than or equal to (or greater than) the second threshold.
In one embodiment, the power of the load is greater than or equal to the first threshold, and may be a ratio of the power of the alternating current to a ratio of a sum of a maximum power of the load and a charging power of the battery to the first conversion efficiency.
In one embodiment, the power of the load is greater than or equal to the first threshold, and may be a ratio of a sum of a maximum power of the load and a charging power of the battery to the second conversion efficiency, a minimum voltage of the alternating current, and the number of phases of the alternating current.
In one embodiment, the dc power and the battery are controlled by a control device to power the load, and the output voltage of the rectifying device may be adjusted by the control device according to the voltage of the battery.
In one embodiment, the controlling the dc power and the battery to supply power to the load may be performed in a case where the power of the load is greater than or equal to a first threshold, and the controlling the dc power and the battery to supply power to the load may be performed in a case where the power of the ac power is greater than or equal to a sum of an average power of the load and a power of the air conditioner, a maximum power of the load is less than or equal to a sum of a power of the ac power and a discharge power of the battery, and the power of the load is greater than or equal to the first threshold.
504. And controlling the air conditioner to be turned off through the control device when the temperature of the environment is less than (or less than or equal to) the third threshold.
When the control device controls the direct current and the battery to supply power to the load, whether the ambient temperature is smaller than a third threshold value or not can be judged, and the air conditioner can be controlled to be turned off under the condition that the ambient temperature is smaller than the third threshold value (or smaller than or equal to). After the air conditioner is turned off, whether the temperature of the environment is greater than (or greater than or equal to) a fourth threshold value may be determined, and the air conditioner may be controlled to be turned on in a case where the temperature of the environment is determined to be greater than the fourth threshold value.
505. The control device controls the direct current to supply power to the load.
The detailed description of steps 501 to 505 may refer to the corresponding description above, and is not limited herein.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention. As shown in fig. 6, the base station may include a power supply device and a communication device, wherein:
the power supply device is coupled with the communication device and used for supplying power to the communication device;
communication means for communicating with a communication device.
For a detailed description of the power supply device, reference may be made to the above description, which is not repeated herein.
The above-mentioned embodiments, objects, technical solutions and advantages of the present application are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present application should be included in the scope of the present application.
Claims (17)
1. A power supply device, comprising a rectifying device, a control device, and a battery, wherein:
the rectifying device is used for converting input alternating current into direct current;
the control device is coupled with the rectifying device and used for controlling the direct current and the battery to supply power to the load when the power of the load is greater than or equal to a first threshold value;
the control device is further configured to control the direct current to supply power to the load when the power of the load is smaller than the first threshold.
2. The power supply device of claim 1, wherein the load having a power greater than or equal to a first threshold comprises:
the current of the alternating current is greater than or equal to a second threshold value.
3. The power supply device of claim 1, wherein the load having a power greater than or equal to a first threshold comprises:
the power of the alternating current is less than or equal to a ratio of a sum of a maximum power of the load and a charging power of the battery to a first conversion efficiency.
4. The power supply device of claim 1, wherein the load having a power greater than or equal to a first threshold comprises:
the open-air current of the alternating current is less than or equal to a ratio of a sum of a maximum power of the load and a charging power of the battery to a second conversion efficiency, a minimum voltage of the alternating current, and the number of phases of the alternating current.
5. The power supply device according to any one of claims 1 to 4, wherein said controlling the direct current and the battery to supply power to the load comprises:
and adjusting the output voltage of the rectifying device according to the voltage of the battery.
6. The power supply device according to any one of claims 1 to 5, further comprising an air conditioner, wherein:
the control device is coupled with the air conditioner and is further used for controlling the air conditioner to be shut down when the power of the load is greater than or equal to the first threshold value and the temperature of the environment is less than a third threshold value;
the control device is further configured to control the air conditioner to start up when the temperature of the environment is greater than a fourth threshold, where the third threshold is smaller than the fourth threshold.
7. The power supply device of claim 6, further comprising a temperature sensor, wherein:
the control device is coupled with the temperature sensor and is further used for acquiring the temperature of the environment through the temperature sensor.
8. The power supply device according to claim 6 or 7, wherein the control device controls the direct current and the battery to supply power to the load when the load power is greater than or equal to a first threshold value, including:
and controlling the direct current and the battery to supply power to the load when the power of the alternating current is greater than or equal to the sum of the average power of the load and the power of the air conditioner, the maximum power of the load is less than or equal to the sum of the power of the alternating current and the discharge power of the battery, and the power of the load is greater than or equal to the first threshold value.
9. A power supply method, applied to a power supply device including a rectifying device, a control device, and a battery, comprising:
converting alternating current into direct current through the rectifying device;
controlling the direct current and the battery to supply power to the load through the control device under the condition that the power of the load is greater than or equal to a first threshold value;
and controlling the direct current to supply power to the load through the control device under the condition that the power of the load is smaller than the first threshold value.
10. The method of claim 9, wherein the load having a power greater than or equal to a first threshold comprises:
the current of the alternating current is greater than or equal to a second threshold value.
11. The method of claim 9, wherein the load having a power greater than or equal to a first threshold comprises:
the power of the alternating current is less than or equal to a ratio of a sum of a maximum power of the load and a charging power of the battery to a first conversion efficiency.
12. The method of claim 9, wherein the load having a power greater than or equal to a first threshold comprises:
the open-air current of the alternating current is less than or equal to a ratio of a sum of a maximum power of the load and a charging power of the battery to a second conversion efficiency, a minimum voltage of the alternating current, and the number of phases of the alternating current.
13. The method according to any one of claims 9-12, wherein said controlling said direct current and said battery to power said load by said control device comprises:
and adjusting the output voltage of the rectifying device according to the voltage of the battery through the control device.
14. The method of any of claims 9-13, wherein the power supply further comprises an air conditioner, the method further comprising:
controlling the air conditioner to be shut down through the control device under the conditions that the power of the load is greater than or equal to the first threshold value and the temperature of the environment is less than a third threshold value;
and controlling the air conditioner to be started up through the control device under the condition that the temperature of the environment is greater than a fourth threshold value, wherein the third threshold value is smaller than the fourth threshold value.
15. The method of claim 14, wherein the power supply further comprises a temperature sensor, the method further comprising:
and acquiring the temperature of the environment through the temperature sensor.
16. The method according to claim 14 or 15, wherein the controlling the direct current and the battery to power the load in case that the load power is greater than or equal to a first threshold value comprises:
controlling, by the control device, the direct current and the battery to supply power to the load in a case where the power of the alternating current is greater than or equal to a sum of an average power of the load and a power of the air conditioner, a maximum power of the load is less than or equal to a sum of the power of the alternating current and a discharge power of the battery, and the power of the load is greater than or equal to the first threshold value.
17. A base station comprising the power supply apparatus and the communication apparatus according to any one of claims 1 to 8, wherein:
the power supply device is coupled with the communication device and used for supplying power to the communication device;
the communication device is used for communication.
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| CN201911026169.3A CN112713622A (en) | 2019-10-25 | 2019-10-25 | Power supply method, device and base station |
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Application publication date: 20210427 |