A dual power supply system for communication base stations based on the Internet of Things

Abstract

The present invention relates to the field of power supply systems, and in particular to a dual power supply system for a communication base station based on the Internet of Things, comprising a power supply detection module, a power supply analysis module, a power supply switching module, a power supply monitoring module, a power supply health analysis module, a power supply charging module, and a management database. The system determines whether a backup power supply needs to be enabled by analyzing a fault condition of a main power supply, obtains a power supply switching evaluation coefficient through a power supply switching parameter, determines whether to switch the power supply back to the main power supply through an electric energy evaluation coefficient at each monitoring time point of the main power supply, obtains a health evaluation coefficient of the backup power supply through a power supply health parameter of the backup power supply, determines whether to charge the backup power supply through the electric quantity of the backup power supply at each detection time point, performs real-time detection of the battery electric quantity of the backup power supply, and then determines whether charging is completed, thereby realizing accurate analysis of the power supply status and intelligent switching decision-making, and improving the reliability and autonomy of the system.

Description

Technical Field

[0001] The present invention relates to the field of power supply systems, and in particular to a dual power supply system for a communication base station based on the Internet of Things. Background Art

[0002] In today's era of rapid digital development, communications have become an indispensable support for social operations and people's lives. As the key infrastructure of communication networks, the stable operation of communication base stations is of vital importance.

[0003] With the continuous advancement of science and technology and the rise of Internet of Things technology, the dual power supply system of communication base stations based on the Internet of Things has gradually attracted attention. In this context, on the one hand, the continuous growth of communication services has put forward higher requirements on the reliability of base stations; on the other hand, the development of Internet of Things technology has made it possible to manage power supplies intelligently, which can monitor and control the power supply status in real time to ensure that the base station is always in the best working condition.

[0004] For example, the existing Chinese patent with publication number CN201252421Y discloses an automatic power switching device for a communication base station. This solution connects the AC power supply, the generator set, the dual power conversion switch, etc. respectively through an intelligent monitoring control panel to realize power supply detection and control of the dual power conversion switch, so that switching between the AC power supply and the generator set can be performed. In addition, the intelligent monitoring control panel can also be connected to a remote monitoring center, a remote PC, etc. to realize remote monitoring and control.

[0005] The existing Chinese patent with publication number CN110311466A discloses a dual power supply system, control method, equipment and storage medium for a railway communication base station. The solution uses a detector to detect the power supply status and switches to the backup power supply when the main power supply fails. At the same time, the power supply is detected and controlled through PLC control, so that the corresponding indicator light is on when the power supply is working normally, a fault indication and alarm are issued when the power fails, and a recovery bell sounds when the fault is repaired, ensuring the continuity and stability of the power supply for the railway communication base station and avoiding communication interruption due to main power supply failure.

[0006] However, the above solutions all have the following shortcomings: the above solutions mainly focus on the switching mechanism from the main power supply to the backup power supply, but the reliability and potential problems of the backup power supply itself may be ignored, such as power health analysis, charging management and other aspects, which may lead to reduced reliability and shortened life of the backup power supply in long-term operation, and the inability to know its health status in time, affecting the emergency power supply effect, and unreasonable charging affecting its performance and backup time. Summary of the invention

[0007] In order to overcome the shortcomings of the background technology, an embodiment of the present invention provides a dual power supply system for a communication base station based on the Internet of Things, which can effectively solve the problems involved in the above-mentioned background technology.

[0008] The purpose of the present invention can be achieved through the following technical solutions: The present invention provides a dual power supply system for a communication base station based on the Internet of Things, including: a power supply detection module, which is used to detect the power parameters of the main power supply at each time point, and the power parameters include output current, output voltage, and the degree of fluctuation of output current.

[0009] The power supply analysis module is used to analyze the fault conditions of the main power supply according to the power parameters of the main power supply and determine whether the backup power supply needs to be activated. The fault conditions include overvoltage, power outage, and short circuit.

[0010] The power switching module is used to detect the power switching parameters when switching from the main power supply to the backup power supply, analyze and obtain the power switching evaluation coefficient, and provide feedback. The power switching parameters include the timeliness and stability of the power switching.

[0011] The power supply monitoring module continuously monitors the power parameters of the main power supply at each monitoring time point during the operation of the backup power supply, analyzes the power evaluation coefficient of the main power supply at each monitoring time point, and then determines whether to switch the power supply back to the main power supply.

[0012] The power health analysis module is used to detect the power health parameters of the backup power supply when the backup power supply is not working, analyze and obtain the health evaluation coefficient of the backup power supply, and provide feedback. The power health parameters of the backup power supply include DC internal resistance, AC internal resistance, and charge and discharge efficiency.

[0013] The power charging module is used to monitor the power level of the backup power supply at each detection time point in real time to determine whether the backup power supply needs to be charged, and to detect the battery power of the backup power supply in real time during the charging process to determine whether the charging is completed.

[0014] The management database is used to store reference values ​​of preset power switching time, backup power supply internal resistance, and charge and discharge efficiency.

[0015] Preferably, the specific analysis method of the power supply detection module is: select a number of monitoring points in the input end, output end and branch circuit of the main power supply, number them in sequence as the main power supply monitoring points, and number the main power supply monitoring points as At the same time, a time point is selected according to the set interval length, recorded as each time point, and the output current of each monitoring point of the main power supply at each time point is detected by the current sensor, recorded as , Indicates The number of the time point, , the output current of the main power supply at each time point is obtained by taking the average value of the output current of each monitoring point at each time point, which is recorded as ,formula Get the fluctuation degree of the output current of the main power supply at each time point , It indicates the number of monitoring points. At the same time, the output voltage of each monitoring point of the main power supply at each time point is detected by the voltage sensor, and the average value is calculated to obtain the output voltage of the main power supply at each time point.

[0016] Preferably, the specific analysis method of the power supply analysis module is: the first step is to read the output voltage of the main power supply at each time point, and compare it with the preset main power supply overvoltage threshold in turn. If the output voltage of the main power supply at a certain time point is greater than or equal to the preset main power supply overvoltage threshold, it means that the main power supply has an overvoltage phenomenon at that time point, and it is necessary to cut off the main power supply output and switch the load to the backup power supply. At the same time, this time point is recorded as the failure time point of the main power supply.

[0017] In the second step, if the output voltage of the main power supply is 0 at a certain time point, it means that the main power supply is out of power at that time point and the backup power supply needs to be switched. This time point is recorded as the failure time point.

[0018] The third step is to read the fluctuation degree of the output current of the main power supply at each time point, and compare it with the preset fluctuation degree threshold. If the fluctuation degree of the output current of the main power supply at a certain time point is greater than or equal to the preset fluctuation degree threshold, it means that the main power supply has a short circuit at that time point, and it is necessary to cut off the main power supply output and switch the load to the backup power supply. At the same time, this time point is recorded as the failure time point of the main power supply.

[0019] Preferably, the specific analysis method of the power switching parameters is as follows: the first step is to connect a high-precision timing sensor to the power switching device to detect the actual duration of switching between the main power supply and the backup power supply, which is recorded as the power switching duration. At the same time, a voltage mutation monitoring sensor is installed on the power supply line of the system to detect the mutation signal of the main power supply, obtain the corresponding time point of the mutation signal, record it as the power supply switching time point, and read the main power supply failure time point at the same time. The power supply switching time point and the main power supply failure time point are unified into the set time unit, and the power supply voltage mutation switching duration is obtained by subtracting the converted power supply switching time point and the main power supply failure time point, which is recorded as , through the formula Get the power switching timeliness , Indicates the reference value of the preset power switching time.

[0020] In the second step, after switching to the backup power supply, several monitoring time points are selected according to the set interval length, and the output voltage and output current of the backup power supply at each monitoring time point are detected respectively, which are recorded as , Indicates The number of the monitoring time point, , the output voltage and output current of the backup power supply are obtained by taking the average value of the output voltage and output current of the backup power supply at each monitoring time point, which are recorded as , substituting it into the formula , Get the voltage fluctuation degree of the backup power supply , Current fluctuation degree , substituting it into the formula Get the stability of power switching , Indicates the weight factor of the preset voltage fluctuation degree and current fluctuation degree, Represents a natural constant.

[0021] Preferably, the specific analysis method of the power switching evaluation coefficient is: respectively reading the timeliness of power switching ,stability , substituting it into the formula Get the power switching evaluation coefficient ,in The weight factors respectively represent the timeliness and stability of the set power switching, and the power switching evaluation coefficient is compared with the preset power switching evaluation coefficient threshold. If the power switching evaluation coefficient is greater than or equal to the preset power switching evaluation coefficient threshold, it means that the power switching evaluation coefficient is qualified. If the power switching evaluation coefficient is less than the preset power switching evaluation coefficient threshold, it means that the power switching evaluation coefficient is unqualified, and feedback is given to the system.

[0022] Preferably, the specific analysis method of the power monitoring module is: during the operation of the backup power supply, the output current and output voltage of each monitoring point of the main power supply are detected, and the output voltage and output current of each monitoring time point of the main power supply are obtained by taking the average value, which is recorded as According to the method of analyzing the fluctuation degree of the output current of the main power supply at each time point, the fluctuation degree of the output current of the main power supply at each monitoring time point is obtained, which is recorded as , substituting it into the formula

[0023] Get the power evaluation coefficient of the main power supply at each monitoring time point , Indicates the preset reference values ​​of the main power supply output voltage and output current. They represent the set output voltage, output current, and the weighting factor of the output current fluctuation degree, respectively. Indicates the number of monitoring time points.

[0024] Preferably, the specific analysis method for determining whether to switch the power supply back to the main power supply is: reading the power evaluation coefficient of the main power supply at each monitoring time point, comparing the power evaluation coefficient of the main power supply at each monitoring time point with a preset power evaluation coefficient threshold; if the power evaluation coefficient of the main power supply at a certain monitoring time point is greater than or equal to the preset power evaluation coefficient threshold, it means that the power evaluation coefficient of the main power supply at that monitoring time point is qualified, and the power supply is switched back to the main power supply.

[0025] Preferably, the specific analysis method of the power health parameters of the backup power supply is as follows: the first step is to connect the constant current source to the backup power supply, and output a set constant current for the constant current source, start the constant current source to start discharging, and use a voltmeter to monitor in real time the voltage value at the moment when the discharge starts at both ends of the backup power supply and the voltage value after the set discharge time, which are recorded as , through the formula Get the voltage drop across the backup power supply , the set constant current is recorded as , through the formula Get the DC internal resistance of the backup power supply .

[0026] The second step is to connect the AC power supply, backup power supply, voltmeter and ammeter into a circuit in the correct way, set the AC voltage of each frequency from low to high according to the set frequency, and gradually apply it to the backup power supply. Use the ammeter to measure the current value corresponding to the AC voltage of each frequency, so as to construct the volt-ampere characteristic curve. Select several frequency points from the volt-ampere characteristic curve, and divide several frequency point groups into groups with adjacent frequency points as a group, which are recorded as each group of frequency points. The AC internal resistance of the backup power supply is obtained by obtaining the slope of the line connecting each group of frequency points and taking the average value, which is recorded as .

[0027] The third step is to test the backup power supply for charging and discharging, and record the charging time of the backup power supply. , discharge time , and select several equally spaced time points in the charging time and discharging time of the backup power supply, record them as charging time points and discharging time points, and detect the voltage and current of each charging time point and each discharging time point of the backup power supply, record them as , Indicates The number of the charging time point, , Indicates The number of the discharge time point, , through the formula

[0028] Get the charging and discharging efficiency of the backup power supply , represents the number of discharge time points, Indicates the number of charging time points.

[0029] Preferably, the specific analysis method of the health evaluation coefficient of the backup power supply is: respectively reading the DC internal resistance of the backup power supply , AC internal resistance , Charge and discharge efficiency , substituting it into the formula

[0030] Get the health assessment coefficient of the backup power supply ,in They represent the preset backup power supply internal resistance and the weighting factors of the charging and discharging efficiency, They respectively represent the reference values ​​of the preset backup power supply internal resistance and charge and discharge efficiency. The health evaluation coefficient of the backup power supply is compared with the preset health evaluation coefficient threshold. If the health evaluation coefficient of the backup power supply is greater than or equal to the preset health evaluation coefficient threshold, it means that the health evaluation coefficient of the backup power supply is qualified. Otherwise, it means that the health evaluation coefficient of the backup power supply is unqualified, and feedback is given to the system.

[0031] Preferably, the specific analysis method of the power charging module is: in the first step, a number of time points are selected for detection according to the set duration, recorded as each detection time point, and the power of the backup power supply at each detection time point is monitored in real time to obtain the power of the backup power supply at each detection time point.

[0032] In the second step, the power level of the backup power supply at each detection time point is compared with the preset minimum battery power level. When the power level of the backup power supply at a certain detection time point is less than the preset minimum battery power level, it indicates that the backup power supply needs to be charged.

[0033] The third step is to select the charging mode of the backup power supply, transmit appropriate current and voltage to the backup power supply for charging, and perform real-time detection of the battery power of the backup power supply during the charging process to determine whether the charging is completed.

[0034] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention analyzes the fault condition of the main power supply according to the electric energy parameters of the main power supply and determines whether the backup power supply needs to be activated, which helps to timely discover possible abnormal conditions of the main power supply, such as excessive current fluctuations or unstable voltage, so as to provide early warning and maintenance, thereby improving the reliability of the power supply system.

[0035] 2. The present invention detects power switching parameters during power switching, analyzes to obtain a power switching evaluation coefficient, and provides feedback to ensure the rationality and safety of power switching. The power switching evaluation coefficient can be used to better grasp the switching timing and effect.

[0036] 3. The present invention continuously monitors the power parameters of the main power supply at each monitoring time point during the operation of the backup power supply, analyzes the power evaluation coefficient of the main power supply at each monitoring time point, and then determines whether to switch the power supply back to the main power supply, thereby improving the flexibility and reliability of power supply use.

[0037] 4. The present invention detects the power health parameters of the backup power supply when the backup power supply is not working, and analyzes and obtains the health evaluation coefficient of the backup power supply, which helps to discover potential problems in advance and make preparations for maintenance and management.

[0038] 5. The present invention determines whether the backup power supply needs to be charged by real-time monitoring of the power level of the backup power supply at each detection time point, and detects the battery power of the backup power supply in real time during the charging process to further determine whether the charging is completed, thereby ensuring that the backup power supply is available at any time and enhancing the emergency support capability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0040] Figure 1 This is a system module connection diagram of the present invention.

[0041] Figure 2 Schematic diagram of the analysis process of the power supply analysis module.

[0042] Figure 3 Schematic diagram of the analysis process for the power charging module. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] See also Figure 1As shown, a dual power supply system for a communication base station based on the Internet of Things includes a power detection module, a power analysis module, a power switching module, a power monitoring module, a power health analysis module, a power charging module, and a management database.

[0045] The management database is connected to the power analysis module, the power switching module, the power health analysis module, and the power charging module; the power detection module is connected to the power analysis module; and the power monitoring module is connected to the power health analysis module.

[0046] The power supply detection module is used to detect the power parameters of the main power supply at each time point. The power parameters include output current, output voltage, and the degree of fluctuation of output current.

[0047] The specific analysis method of the power supply detection module is: select a number of monitoring points in the input end, output end and branch circuit of the main power supply, and number them in sequence as the main power supply monitoring points, and number the main power supply monitoring points as At the same time, a time point is selected according to the set interval length, recorded as each time point, and the output current of each monitoring point of the main power supply at each time point is detected by the current sensor, recorded as , Indicates The number of the time point, , the output current of the main power supply at each time point is obtained by taking the average value of the output current of each monitoring point at each time point, which is recorded as ,formula Get the fluctuation degree of the output current of the main power supply at each time point , It indicates the number of monitoring points. At the same time, the output voltage of each monitoring point of the main power supply at each time point is detected by the voltage sensor, and the average value is obtained to obtain the output voltage of the main power supply at each time point. This helps to timely discover possible abnormal conditions of the main power supply, such as excessive current fluctuations or unstable voltage, so as to carry out early warning and maintenance and improve the reliability of the power supply system.

[0048] The power supply analysis module is used to analyze the fault conditions of the main power supply according to the power parameters of the main power supply and determine whether the backup power supply needs to be activated. The fault conditions include overvoltage, power outage, and short circuit.

[0049] See also Figure 2As shown, the specific analysis method of the power supply analysis module is: the first step is to read the output voltage of the main power supply at each time point, and compare it with the preset main power supply overvoltage threshold value in turn. If the output voltage of the main power supply at a certain time point is greater than or equal to the preset main power supply overvoltage threshold value, it means that the main power supply is overvoltage at this time point, and it is necessary to cut off the main power supply output and switch the load to the backup power supply. At the same time, this time point is recorded as the failure time point of the main power supply; the main power supply overvoltage situation can be accurately identified, and measures can be taken in time to protect the equipment to avoid damage to the load equipment caused by overvoltage.

[0050] In the second step, if the output voltage of the main power supply is 0 at a certain point in time, it means that the main power supply is out of power at that point in time and the backup power supply needs to be switched. This point in time is recorded as the fault time point; the main power supply outage can be detected at the first time, and the backup power supply can be switched in time to ensure the uninterrupted operation of the load equipment.

[0051] The third step is to read the fluctuation degree of the output current of the main power supply at each time point, and compare it with the preset fluctuation degree threshold. If the fluctuation degree of the output current of the main power supply at a certain time point is greater than or equal to the preset fluctuation degree threshold, it means that a short circuit occurs in the main power supply at that time point, and it is necessary to cut off the main power supply output and switch the load to the backup power supply. At the same time, this time point is recorded as the failure time point of the main power supply. Power switching is performed in a timely manner to reduce the impact of the short circuit on the system, and the failure time point is accurately recorded to facilitate subsequent maintenance and analysis.

[0052] The power switching module is used to detect the power switching parameters when switching from the main power supply to the backup power supply, analyze and obtain the power switching evaluation coefficient, and provide feedback. The power switching parameters include the timeliness and stability of the power switching.

[0053] The specific analysis method of the power switching parameters is as follows: First, connect a high-precision timing sensor to the power switching device to detect the actual duration of switching between the main power supply and the backup power supply, and record it as the power switching duration. At the same time, a voltage mutation monitoring sensor is installed on the power supply line of the system to detect the mutation signal of the main power supply, obtain the corresponding time point of the mutation signal, record it as the power supply switching time point, and read the main power supply failure time point at the same time. The power supply switching time point and the main power supply failure time point are unified into the set time unit, and the power supply voltage mutation switching duration is obtained by subtracting the converted power supply switching time point and the main power supply failure time point, which is recorded as , through the formula Get the power switching timeliness , Indicates the reference value of the preset power switching time; promptly detects whether the power switching is timely, ensures rapid response switching when a fault occurs, and reduces the impact on the system.

[0054] It should be noted that, in a specific embodiment, the time unit is set to seconds, and there is a main power failure time point and a power switching time point, which are 10:20:30 on November 4, 2024 and 11:50:45 on November 4, 2024, respectively. 10 hours and 11 hours are converted into 36,000 seconds and 39,600 seconds, respectively, and then minutes and seconds are calculated. 20 minutes and 50 minutes are converted into 1,200 seconds and 3,000 seconds, and 30 seconds and 45 seconds remain unchanged. The total number of seconds after the main power failure time point is converted is seconds, the total number of seconds after the power switching time point is converted is seconds, and the difference between the two is used to obtain the power supply voltage sudden switching time Second.

[0055] In the second step, after switching to the backup power supply, several monitoring time points are selected according to the set interval length, and the output voltage and output current of the backup power supply at each monitoring time point are detected respectively, which are recorded as , Indicates The number of the monitoring time point, , the output voltage and output current of the backup power supply are obtained by taking the average value of the output voltage and output current of the backup power supply at each monitoring time point, which are recorded as , substituting it into the formula , Get the voltage fluctuation degree of the backup power supply , Current fluctuation degree , substituting it into the formula Get the stability of power switching , Indicates the weight factor of the preset voltage fluctuation degree and current fluctuation degree, Represents a natural constant; it can promptly detect whether the backup power supply is stable during operation, ensuring continuous and reliable operation of the equipment.

[0056] The specific analysis method of the power switching evaluation coefficient is: respectively read the timeliness of power switching ,stability , substituting it into the formula Get the power switching evaluation coefficient ,in The weight factors of the timeliness and stability of the set power switching are respectively represented, and the power switching evaluation coefficient is compared with the preset power switching evaluation coefficient threshold. If the power switching evaluation coefficient is greater than or equal to the preset power switching evaluation coefficient threshold, it means that the power switching evaluation coefficient is qualified. If the power switching evaluation coefficient is less than the preset power switching evaluation coefficient threshold, it means that the power switching evaluation coefficient is unqualified, and feedback is given to the system; it helps the system to self-adjust and optimize according to the power switching situation, and improve the overall performance and reliability of the system.

[0057] It should be noted that, in a specific embodiment, It can be set to 0.5. It can be set to 0.5. Timely switching is more important. If the power switching is not timely enough, it may cause the device to lose power instantly, resulting in serious consequences such as data loss, equipment damage and even safety risks, which will have a great impact on the normal operation of the system. The switching stability cannot be ignored either. Stable power output is crucial for the long-term reliable operation of the equipment. If the stability is poor, it may cause the equipment to work abnormally and shorten the life of the equipment. Therefore, the timeliness and stability of the power switching have equal weights.

[0058] The power supply monitoring module continuously monitors the power parameters of the main power supply at each monitoring time point during the operation of the backup power supply, analyzes the power evaluation coefficient of the main power supply at each monitoring time point, and then determines whether to switch the power supply back to the main power supply.

[0059] The specific analysis method of the power monitoring module is: during the operation of the backup power supply, the output current and output voltage of each monitoring point of the main power supply are detected, and the output voltage and output current of each monitoring time point of the main power supply are obtained by taking the average value, which is recorded as According to the method of analyzing the fluctuation degree of the output current of the main power supply at each time point, the fluctuation degree of the output current of the main power supply at each monitoring time point is obtained, which is recorded as , substituting it into the formula

[0060] Get the power evaluation coefficient of the main power supply at each monitoring time point , Indicates the preset reference values ​​of the main power supply output voltage and output current. They represent the set output voltage, output current, and the weighting factor of the output current fluctuation degree, respectively. Indicates the number of monitoring time points; helps to more accurately grasp the typical performance of the main power supply and reflects the stability and reliability of the main power supply.

[0061] It should be noted that, in a specific embodiment, It can be set to 0.4. It can be set to 0.4. It can be set to 0.2. Stable output voltage is crucial to the normal operation of connected devices. If the voltage fluctuates greatly or deviates greatly from the normal value, it may directly lead to equipment failure or damage. The output current reflects the load capacity and power supply of the power supply. Abnormal current may indicate problems with the power supply or load. The degree of output current fluctuation mainly reflects the stability of the power supply. Although it is not as critical as voltage, long-term fluctuations may also have adverse effects on the equipment. Therefore, the weights corresponding to the output voltage and output current are higher.

[0062] The specific analysis method for determining whether to switch the power supply back to the main power supply is as follows: reading the power evaluation coefficient of the main power supply at each monitoring time point, comparing the power evaluation coefficient of the main power supply at each monitoring time point with a preset power evaluation coefficient threshold; if the power evaluation coefficient of the main power supply at a certain monitoring time point is greater than or equal to the preset power evaluation coefficient threshold, it means that the power evaluation coefficient of the main power supply at that monitoring time point is qualified, and the power supply is switched back to the main power supply; the stability and reliability of the power supply are ensured, and when the main power supply returns to normal, it can be switched back in time, reducing dependence on the backup power supply and improving the efficiency of the overall power supply system.

[0063] The power health analysis module is used to detect the power health parameters of the backup power supply when the backup power supply is not working, analyze and obtain the health evaluation coefficient of the backup power supply, and provide feedback. The power health parameters of the backup power supply include DC internal resistance, AC internal resistance, and charge and discharge efficiency.

[0064] The specific analysis method of the power health parameters of the backup power supply is as follows: the first step is to connect the constant current source to the backup power supply, and output a set constant current for the constant current source, start the constant current source to start discharging, and use a voltmeter to monitor the voltage value at the moment when the backup power supply starts discharging and the voltage value after the set discharge time in real time, which are recorded as , through the formula Get the voltage drop across the backup power supply , the set constant current is recorded as , through the formula Get the DC internal resistance of the backup power supply ; Being able to accurately measure the DC internal resistance of a backup power supply helps to understand its internal resistance characteristics under DC discharge conditions, thereby evaluating its performance and health.

[0065] The second step is to connect the AC power supply, backup power supply, voltmeter and ammeter into a circuit in the correct way, set the AC voltage of each frequency from low to high according to the set frequency, and gradually apply it to the backup power supply. Use the ammeter to measure the current value corresponding to the AC voltage of each frequency, so as to construct the volt-ampere characteristic curve. Select several frequency points from the volt-ampere characteristic curve, and divide several frequency point groups into groups with adjacent frequency points as a group, which are recorded as each group of frequency points. The AC internal resistance of the backup power supply is obtained by obtaining the slope of the line connecting each group of frequency points and taking the average value, which is recorded as By constructing the volt-ampere characteristic curve, we can fully understand the current response of the backup power supply under different AC voltage frequencies and further grasp its AC characteristics.

[0066] It should be noted that the specific analysis method for constructing the volt-ampere characteristic curve is: respectively read the AC voltage of each frequency and the AC current of each frequency, construct a two-dimensional coordinate system with the AC voltage as the horizontal coordinate and the AC current as the vertical coordinate, and then mark several points in the constructed two-dimensional coordinate system for the AC current corresponding to the AC voltage of each frequency to form an AC voltage-AC current curve, which is recorded as the volt-ampere characteristic curve.

[0067] It should be noted that the specific analysis method of the AC internal resistance of the standby resistor is: obtain the coordinates of two frequency points in each group of frequency points, and record them as , Indicates The number of the group frequency point, , substituting it into the formula Get the AC internal resistance of the standby resistor , Indicates the number of frequency point groups.

[0068] The third step is to test the backup power supply for charging and discharging, and record the charging time of the backup power supply. , discharge time , and select several equally spaced time points in the charging time and discharging time of the backup power supply, record them as charging time points and discharging time points, and detect the voltage and current of each charging time point and each discharging time point of the backup power supply, record them as , Indicates The number of the charging time point, , Indicates The number of the discharge time point, , through the formula

[0069] Get the charging and discharging efficiency of the backup power supply , represents the number of discharge time points, Indicates the number of charging time points; helps to discover possible problems with the backup power supply during the charging and discharging process, such as low charging efficiency, unstable discharge, etc., so as to make timely improvements or adjustments.

[0070] The specific analysis method of the health evaluation coefficient of the backup power supply is: read the DC internal resistance of the backup power supply respectively , AC internal resistance , Charge and discharge efficiency , substituting it into the formula

[0071] Get the health assessment coefficient of the backup power supply ,in They represent the preset backup power supply internal resistance and the weighting factors of the charging and discharging efficiency, They respectively represent the reference values ​​of the preset backup power supply internal resistance and charge and discharge efficiency, and compare the health evaluation coefficient of the backup power supply with the preset health evaluation coefficient threshold. If the health evaluation coefficient of the backup power supply is greater than or equal to the preset health evaluation coefficient threshold, it means that the health evaluation coefficient of the backup power supply is qualified, otherwise it means that the health evaluation coefficient of the backup power supply is unqualified, and feedback is given to the system; it helps to improve the stability and safety of the entire system and ensure that the backup power supply can operate normally when it is needed.

[0072] It should be noted that, in a specific embodiment, It can be set to 0.6. It can be set to 0.4. The charge and discharge efficiency directly reflects the effectiveness of energy conversion and utilization of the backup power supply in actual use. It is crucial for the backup power supply to provide power stably for a long time. Higher charge and discharge efficiency means better performance and longer endurance, which is of great significance to the normal operation of the system. The weight of the internal resistance of the backup power supply cannot be ignored. Smaller internal resistance usually means better power transmission performance and lower energy loss, which will affect the stability and reliability of the power supply output. However, relatively speaking, in some cases, the charge and discharge efficiency may be more critical because it can more directly reflect the performance of the backup power supply in actual working conditions. Therefore, the weight corresponding to the internal resistance of the backup power supply is larger.

[0073] The power charging module is used to monitor the power level of the backup power supply at each detection time point in real time to determine whether the backup power supply needs to be charged, and to detect the battery power of the backup power supply in real time during the charging process to determine whether the charging is completed.

[0074] See also Figure 3As shown, the specific analysis method of the power charging module is: the first step is to select a number of time points for detection according to the set duration, record them as each detection time point, and monitor the power of the backup power supply at each detection time point in real time to obtain the power of the backup power supply at each detection time point; the reliability and stability of the system are enhanced to prevent system failure or interruption due to insufficient backup power supply.

[0075] The second step is to compare the power level of the backup power supply at each detection time point with the preset minimum battery power level. When the power level of the backup power supply at a certain detection time point is less than the preset minimum battery power level, it means that the backup power supply needs to be charged. By charging in time, the service life of the backup power supply is extended and the damage to the battery caused by excessive discharge is reduced.

[0076] The third step is to select the charging mode of the backup power supply, transmit the appropriate current and voltage to the backup power supply for charging, and detect the battery power of the backup power supply in real time during the charging process to determine whether the charging is completed; precise charging control can improve charging efficiency, shorten charging time, and also reduce energy waste.

[0077] The management database is used to store reference values ​​of preset power switching time, backup power supply internal resistance, and charge and discharge efficiency.

[0078] This system analyzes the fault of the main power supply through the power parameters of the main power supply, determines whether the backup power supply needs to be enabled, obtains the power switching evaluation coefficient through the power switching parameters, obtains the power evaluation coefficient of the main power supply at each monitoring time point through the power parameters of the main power supply, and then determines whether to switch the power supply back to the main power supply, obtains the health evaluation coefficient of the backup power supply through the power health parameters of the backup power supply, determines whether the backup power supply needs to be charged through the power of the backup power supply at each detection time point, and performs real-time detection of the battery power of the backup power supply to determine whether the charging is completed, thereby realizing accurate analysis of the power status and intelligent switching decisions, and improving the reliability and autonomy of the system.

[0079] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention and they are still covered by the protection scope of the present invention.

Claims

1. A dual power supply system for a communication base station based on the Internet of Things, characterized in that: The system specifically includes: a management database, a power detection module, a power analysis module, a power switching module, a power monitoring module, a power health analysis module and a power charging module, wherein the management database is connected to the power analysis module, the power switching module, the power health analysis module and the power charging module, the power detection module is connected to the power analysis module, and the power monitoring module is connected to the power health analysis module; wherein: A power supply detection module is used to detect the power parameters of the main power supply at each time point, the power parameters including output current, output voltage, current fluctuation degree and voltage fluctuation degree; The power supply analysis module is used to analyze the fault conditions of the main power supply according to the power parameters of the main power supply and determine whether the backup power supply needs to be activated. The fault conditions include overvoltage, power outage, and short circuit. A power switching module is used to detect power switching parameters when switching from the main power supply to the backup power supply, analyze and obtain the power switching evaluation coefficient, and provide feedback; The specific analysis method of power switching parameters is: The first step is to connect the high-precision timing sensor to the power switching device to detect the actual duration of the switch between the main power supply and the backup power supply, which is recorded as the power switching duration. At the same time, a voltage mutation monitoring sensor is installed on the power supply line of the system to detect the mutation signal of the main power supply, obtain the corresponding time point of the mutation signal, record it as the power supply switching time point, and read the main power supply failure time point at the same time. The power supply switching time point and the main power supply failure time point are unified into the set time unit, and the power supply voltage mutation switching duration is obtained by subtracting the converted power supply switching time point and the main power supply failure time point, which is recorded as , through the formula Get the power switching timeliness , Indicates the reference value of the preset power switching time; In the second step, after switching to the backup power supply, several monitoring time points are selected according to the set interval length, and the output voltage and output current of the backup power supply at each monitoring time point are detected respectively, which are recorded as , Indicates The number of the monitoring time point, , the output voltage and output current of the backup power supply are obtained by taking the average value of the output voltage and output current of the backup power supply at each monitoring time point, which are recorded as , substituting it into the formula , Get the voltage fluctuation degree of the backup power supply , Current fluctuation degree , substituting it into the formula Get the stability of power switching , Indicates the weight factor of the preset voltage fluctuation degree and current fluctuation degree, represents a natural constant; Timely switching of power supply and stability The power switching evaluation coefficient is obtained by weighted summation; The power supply monitoring module continuously monitors the power parameters of the main power supply at each monitoring time point during the operation of the backup power supply, analyzes the power evaluation coefficient of the main power supply at each monitoring time point, and then determines whether to switch the power supply back to the main power supply; The power health analysis module is used to detect the power health parameters of the backup power supply when the backup power supply is not working, analyze and obtain the health evaluation coefficient of the backup power supply, and provide feedback. The power health parameters of the backup power supply include DC internal resistance, AC internal resistance, and charge and discharge efficiency; The power charging module is used to monitor the power of the backup power supply in real time at each detection time point to determine whether the backup power supply needs to be charged, and to detect the battery power of the backup power supply in real time during the charging process to determine whether the charging is completed; The management database is used to store reference values ​​of preset power switching time, backup power supply internal resistance, and charge and discharge efficiency.

2. According to the dual power supply system of a communication base station based on the Internet of Things according to claim 1, it is characterized in that: The specific analysis method of the power detection module is: Select several monitoring points at the input end, output end and branch circuit of the main power supply, and number them in sequence as the monitoring points of the main power supply. At the same time, a time point is selected according to the set interval length, recorded as each time point, and the output current of each monitoring point of the main power supply at each time point is detected by the current sensor, recorded as , Indicates The number of the time point, , the output current of the main power supply at each time point is obtained by taking the average value of the output current of each monitoring point at each time point, which is recorded as ,formula Get the fluctuation degree of the output current of the main power supply at each time point , It indicates the number of monitoring points. At the same time, the output voltage of each monitoring point of the main power supply at each time point is detected by the voltage sensor, and the average value is calculated to obtain the output voltage of the main power supply at each time point.

3. According to the dual power supply system of a communication base station based on the Internet of Things according to claim 2, it is characterized in that: The specific analysis method of the power supply analysis module is: The first step is to read the output voltage of the main power supply at each time point, and compare it with the preset main power supply overvoltage threshold in turn. If the output voltage of the main power supply at a certain time point is greater than or equal to the preset main power supply overvoltage threshold, it means that the main power supply is overvoltage at that time point, and the main power supply output needs to be cut off, and the load is switched to the backup power supply. At the same time, this time point is recorded as the failure time point of the main power supply; In the second step, if the output voltage of the main power supply is 0 at a certain time point, it means that the main power supply is out of power at that time point and the backup power supply needs to be switched. This time point is recorded as the failure time point; The third step is to read the fluctuation degree of the output current of the main power supply at each time point, and compare it with the preset fluctuation degree threshold. If the fluctuation degree of the output current of the main power supply at a certain time point is greater than or equal to the preset fluctuation degree threshold, it means that the main power supply has a short circuit at that time point, and it is necessary to cut off the main power supply output and switch the load to the backup power supply. At the same time, this time point is recorded as the failure time point of the main power supply.

4. According to the dual power supply system of a communication base station based on the Internet of Things in claim 1, it is characterized in that: The specific analysis method of the power switching evaluation coefficient is: Read the timeliness of power switching separately ,stability , substituting it into the formula Get the power switching evaluation coefficient ,in The weight factors respectively represent the timeliness and stability of the set power switching, and the power switching evaluation coefficient is compared with the preset power switching evaluation coefficient threshold. If the power switching evaluation coefficient is greater than or equal to the preset power switching evaluation coefficient threshold, it means that the power switching evaluation coefficient is qualified. If the power switching evaluation coefficient is less than the preset power switching evaluation coefficient threshold, it means that the power switching evaluation coefficient is unqualified, and feedback is given to the system.

5. The dual power supply system for a communication base station based on the Internet of Things according to claim 4 is characterized in that: The specific analysis method of the power monitoring module is: During the operation of the backup power supply, the output current and output voltage of each monitoring point of the main power supply are detected at each monitoring time point, and the output voltage and output current of the main power supply at each monitoring time point are obtained by taking the average value, which is recorded as According to the method of analyzing the fluctuation degree of the output current of the main power supply at each time point, the fluctuation degree of the output current of the main power supply at each monitoring time point is obtained, which is recorded as , substituting it into the formula Get the power evaluation coefficient of the main power supply at each monitoring time point , Indicates the preset reference values ​​of the main power supply output voltage and output current. They represent the set output voltage, output current, and the weighting factor of the output current fluctuation degree, respectively. Indicates the number of monitoring time points.

6. The dual power supply system for a communication base station based on the Internet of Things according to claim 5, characterized in that: The specific analysis method for determining whether to switch the power supply back to the main power supply is: Read the electric energy evaluation coefficient of the main power supply at each monitoring time point, and compare the electric energy evaluation coefficient of the main power supply at each monitoring time point with the preset electric energy evaluation coefficient threshold. If the electric energy evaluation coefficient of the main power supply at a certain monitoring time point is greater than or equal to the preset electric energy evaluation coefficient threshold, it means that the electric energy evaluation coefficient of the main power supply at that monitoring time point is qualified, and the power supply will be switched back to the main power supply.

7. The dual power supply system for a communication base station based on the Internet of Things according to claim 1 is characterized in that: The specific analysis method of the power health parameters of the backup power supply is: The first step is to connect the constant current source to the backup power supply, and output a set constant current for the constant current source, start the constant current source to start discharging, and use a voltmeter to monitor the voltage value at the moment when the backup power supply starts discharging and the voltage value after the set discharge time in real time, which are recorded as , through the formula Get the voltage drop across the backup power supply , the set constant current is recorded as , through the formula Get the DC internal resistance of the backup power supply ; The second step is to connect the AC power supply, backup power supply, voltmeter and ammeter into a circuit in the correct way, set the AC voltage of each frequency from low to high according to the set frequency, and gradually apply it to the backup power supply. Use the ammeter to measure the current value corresponding to the AC voltage of each frequency, so as to construct the volt-ampere characteristic curve. Select several frequency points from the volt-ampere characteristic curve, and divide several frequency point groups into groups with adjacent frequency points as a group, which are recorded as each group of frequency points. The AC internal resistance of the backup power supply is obtained by obtaining the slope of the line connecting each group of frequency points and taking the average value, which is recorded as ; The third step is to test the backup power supply for charging and discharging, and record the charging time of the backup power supply. , discharge time , and select several equally spaced time points in the charging time and discharging time of the backup power supply, record them as charging time points and discharging time points, and detect the voltage and current of each charging time point and each discharging time point of the backup power supply, record them as , Indicates The number of the charging time point, , Indicates The number of the discharge time point, , through the formula Get the charging and discharging efficiency of the backup power supply , represents the number of discharge time points, Indicates the number of charging time points.

8. The dual power supply system for a communication base station based on the Internet of Things according to claim 7, characterized in that: The specific analysis method of the health evaluation coefficient of the backup power supply is: Read the DC internal resistance of the backup power supply separately , AC internal resistance , Charge and discharge efficiency , substituting it into the formula Get the health assessment coefficient of the backup power supply ,in They represent the preset backup power supply internal resistance and the weighting factors of the charging and discharging efficiency, They respectively represent the reference values ​​of the preset backup power supply internal resistance and charge and discharge efficiency. The health evaluation coefficient of the backup power supply is compared with the preset health evaluation coefficient threshold. If the health evaluation coefficient of the backup power supply is greater than or equal to the preset health evaluation coefficient threshold, it means that the health evaluation coefficient of the backup power supply is qualified. Otherwise, it means that the health evaluation coefficient of the backup power supply is unqualified, and feedback is given to the system.

9. The dual power supply system for a communication base station based on the Internet of Things according to claim 1, characterized in that: The specific analysis method of the power charging module is: The first step is to select a number of detection time points according to the set duration, record them as detection time points, monitor the power of the backup power supply at each detection time point in real time, and obtain the power of the backup power supply at each detection time point; The second step is to compare the power of the backup power supply at each detection time point with the preset minimum battery power. When the power of the backup power supply at a certain detection time point is less than the preset minimum battery power, it means that the backup power supply needs to be charged; The third step is to select the charging mode of the backup power supply, transmit appropriate current and voltage to the backup power supply for charging, and perform real-time detection of the battery power of the backup power supply during the charging process to determine whether the charging is completed.

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