Communication base station cable overload monitoring method and system, server, and storage medium

Abstract

The present invention discloses a communication base station cable overload monitoring method and system, a server, and a storage medium. The system includes a server and two monitoring terminals, each of which includes at least one of a voltage test channel, a current test channel, and a temperature test channel. The two monitoring terminals are respectively installed in a distribution box of the base station and a distribution box of a distribution room. The two monitoring terminals are used to monitor at least one of the voltage, current, and temperature at both ends of a three-phase four-wire cable and send the monitoring data to the server. The server is used to analyze at least one of the cable voltage drop, the cable impedance rate, the cable load rate, and the cable temperature according to the acquired monitoring data, and obtain the cable overload condition according to the analysis result, so as to facilitate the prediction of the occurrence of overload that may cause safety hazards, so that load equipment management and control can be done in advance to avoid burning and fire accidents caused by overload heating of the cable.

Description

Technical Field

[0001] The present invention relates to the field of communications, and in particular to a method and system, a server, and a storage medium for monitoring cable overload in a communication base station. Background Art

[0002] With the continuous advancement of 5G communication technology applications, a considerable number of communication base stations need to be upgraded to 5G by adding 5G equipment. Since most base stations are more than 100 meters or even several hundred meters away from the mains power distribution room and are basically buried underground, it is difficult to re-lay the mains power cables because the pipe network needs to be dug up, which takes a long time and is expensive, so it is difficult to renovate the power supply lines. Since 5G equipment consumes a lot of power, the average load and load fluctuation of base station electricity consumption have greatly increased. The original mains power supply lines are overwhelmed, the cables are seriously overheated, and even fire accidents occur.

[0003] At present, power overload protection is almost always achieved by installing overcurrent protection devices (such as fuses, air switches, etc.). However, these devices have no early warning mechanism. Once they work, the entire power supply line will be cut off, the base station will be powered off, and the communication equipment will stop working, causing greater communication failures, which does not meet the safety requirements for base station operation. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a communication base station cable overload monitoring method and system, server, and storage medium in view of the defect of the overcurrent protection scheme in the prior art that the protection is delayed only when overcurrent occurs.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] On the one hand, a communication base station cable overload monitoring method is constructed, the method comprising:

[0007] Acquire at least one monitoring data of voltage, current and temperature at both ends of the three-phase four-wire cable monitored by a first monitoring terminal installed in a distribution box of a base station and a second monitoring terminal installed in a distribution box of a distribution room;

[0008] According to the acquired monitoring data, at least one of the cable voltage drop, the cable impedance rate, the cable load rate and the cable temperature is analyzed, and the cable overload condition is obtained according to the analysis result.

[0009] Preferably, analyzing at least one of the cable voltage drop, the cable impedance, the cable load rate and the cable temperature according to the acquired monitoring data comprises: analyzing the cable voltage drop according to the acquired monitoring data, and analyzing the cable voltage drop comprises:

[0010] Based on the three-phase current I of the three-phase cable monitored by the first monitoring terminal a ,Ib ,I c , calculate the current phase angle of the neutral line

[0011] Based on the current phase angle And the neutral line to ground voltage U monitored by the first monitoring terminal NG And three-phase voltage U 2A , U 2B , U 2C , calculate the voltage U of the three-phase cable to ground at the base station end AG , U BG , U CG ;

[0012] Calculate the three-phase voltage U monitored by the second monitoring terminal 1A , U 1B , U 1C The voltage U of the three-phase cable to ground at the base station AG , U BG , U CG The difference between the three-phase cable voltage drop ΔU A , ΔU B , ΔU C .

[0013] Preferably, analyzing at least one of the cable voltage drop, the cable impedance, the cable load rate and the cable temperature according to the acquired monitoring data comprises: analyzing the cable impedance according to the acquired monitoring data, and analyzing the cable impedance comprises:

[0014] Calculate the neutral line to ground voltage U monitored by the first monitoring terminal NG The neutral line voltage U monitored by the second monitoring terminal N The difference between the zero line drift voltage ΔU N ;

[0015] Calculation of the cable voltage drop ΔU for three-phase cables A , ΔU B , ΔU C and drift voltage ΔU N The corresponding monitored three-phase current I a ,I b ,I c and neutral current I n The ratio of the three-phase cable and the neutral line impedance Z is obtained. A , Z B , Z C , Z N ;

[0016] Calculate the impedance Z of the three-phase cable and the neutral line A , Z B , Z C, Z N The rated resistance R of the three-phase cable and the neutral line calculated correspondingly A , R B , R C , R N The ratio of the three-phase cable and the neutral line is obtained. A , η B , η C , η N .

[0017] Preferably, the analyzing at least one of the cable voltage drop, the cable impedance, the cable load rate and the cable temperature according to the acquired monitoring data comprises: analyzing the cable load rate according to the acquired monitoring data, and analyzing the cable load rate comprises: calculating the monitored three-phase current I a ,I b ,I c and neutral current I n The rated current I of the corresponding three-phase cable and neutral line A ,I B ,I C and neutral current I N The ratio of the three-phase cable and the neutral line is obtained. A , δ B , δ C , δ N .

[0018] Preferably, obtaining the cable overload condition according to the analysis result specifically includes:

[0019] If any of the cable voltage drop, cable impedance, cable load rate and cable temperature in any of the three-phase four-wire cables exceeds the corresponding upper limit, it is judged to be severely overloaded, a severe alarm is issued and a notification is given for immediate processing;

[0020] If any one of the cable voltage drop, cable impedance, cable load rate and cable temperature in any line of the three-phase four-wire cable exceeds the corresponding middle limit value, it is judged as a general overload, a general warning is issued and a notification is given for recommended processing.

[0021] In a second aspect, a server is constructed, including a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the steps of the method described above are implemented.

[0022] In a third aspect, a storage medium is constructed, which stores a computer program, and when the computer program is executed by a processor, the steps of the method described above are implemented.

[0023] In a fourth aspect, a communication base station cable overload monitoring system is constructed, including a server and a first monitoring terminal installed in a distribution box of the base station and a second monitoring terminal installed in a distribution box of a distribution room, respectively. The first monitoring terminal and the second monitoring terminal both include at least one of a voltage test channel, a current test channel, and a temperature test channel. The first monitoring terminal and the second monitoring terminal are used to monitor at least one of the voltage, current, and temperature at both ends of the three-phase four-wire cable and send the monitoring data to the server, and the server is used to execute the steps of the method described above.

[0024] Preferably, a communication connection is established between the first monitoring terminal and the second monitoring terminal via a power line carrier communication method, and the second monitoring terminal sends the monitoring data to the first monitoring terminal based on the power line carrier communication method. The first monitoring terminal includes a wireless communication module for communicating with the server, and the wireless communication module is used to send the monitoring data of the first monitoring terminal and the second monitoring terminal to the server together.

[0025] Preferably, the first monitoring terminal includes: a voltage test channel, which is connected to the three-phase cable, the neutral line and the ground line through the voltage test line, and is used to obtain the three-phase voltage U 2A , U 2B , U 2C And the neutral line to ground voltage U NG ; Current test channel, which is connected to one end of the current test line, and the other end of the current test line is connected to the three-phase cable through the current sensor to obtain the three-phase current I a ,I b ,I c A temperature test channel is connected to one end of the temperature test line. The temperature sensor connected to the other end of the temperature test line is fixed on the three-phase cable and the neutral line respectively, so as to obtain the temperature of the three-phase cable and the neutral line at the base station end.

[0026] The second monitoring terminal includes: a voltage test channel, which is connected to the three-phase cable, the neutral line and the ground line through the voltage test line, and is used to obtain the three-phase voltage U 1A , U 1B , U 1C And the neutral voltage U N ; Current test channel, which is connected to one end of the current test line, and the other end of the current test line is connected to the neutral line through the current sensor to obtain the neutral line current I n A temperature test channel is connected to one end of a temperature test line. The temperature sensors connected to the other end of the temperature test line are fixed on the three-phase cables and are used to obtain the temperature of the three-phase cables at the distribution room end.

[0027] The communication base station cable overload monitoring method and system, server, and storage medium of the present invention have the following beneficial effects: the present invention can monitor at least one monitoring data of voltage, current, and temperature at both ends of a three-phase four-wire cable in real time through two monitoring terminals installed in a distribution box of a base station and a distribution box of a distribution room. The server can analyze at least one of the cable voltage drop, cable impedance rate, cable load rate, and cable temperature according to the monitoring data obtained by the two monitoring terminals, and obtain the cable overload condition according to the analysis result, so as to facilitate the prediction of the occurrence of overload that may cause safety hazards, so that the load equipment can be well managed in advance to avoid burning and fire accidents caused by overload heating of the cable; moreover, on the one hand, the present invention can monitor the temperature of the cable at the base station end and the distribution room end, and can reflect the heating condition of the monitoring cable in real time and intuitively, so as to achieve effective safety warning to prevent cable fire, and on the other hand, through the calculation of the indicators of cable voltage drop, impedance rate, and cable load rate, the degree of cable overload can be judged, and a data basis can be provided for further load allocation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work:

[0029] Figure 1 It is a structural schematic diagram of a communication base station cable overload monitoring system of the present invention;

[0030] Figure 2 It is the installation schematic diagram of the first monitoring terminal;

[0031] Figure 3 This is the installation schematic diagram of the second monitoring terminal;

[0032] Figure 4 It is a flow chart of the communication base station cable overload monitoring method of the present invention. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Typical embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, rather than limitations on the technical solutions of the present application. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0035] Embodiment 1

[0036] refer to Figure 1 The communication base station cable overload monitoring system of the present invention includes a server and a first monitoring terminal and a second monitoring terminal. The first monitoring terminal and the second monitoring terminal both include at least one of a voltage test channel, a current test channel, and a temperature test channel. The first monitoring terminal is installed in the distribution box of the base station, and the second monitoring terminal is installed in the distribution box of the distribution room. The first monitoring terminal and the second monitoring terminal are used to monitor at least one of the voltage, current, and temperature at both ends of the three-phase four-wire cable and send the monitoring data to the server. The server is used to analyze at least one of the cable voltage drop, cable impedance, cable load rate, and cable temperature according to the acquired monitoring data, and obtain the cable overload condition according to the analysis result.

[0037] Theoretically, the monitoring data of the first monitoring terminal and the second monitoring terminal can be sent to the server independently. To ensure that the data is at the same time, a timestamp can be added to the monitoring data. In this embodiment, it is preferred that the first monitoring terminal and the second monitoring terminal communicate with each other, and upload data through one of the monitoring terminals. Specifically, the present invention configures the first monitoring terminal as a host, temporarily recording it as machine A, and configures the second monitoring terminal as a slave, temporarily recording it as machine B. A machine and B machine establish a communication connection through a power line carrier communication (PLC communication, power line carrier communication) mode. Machine B sends the monitoring data to machine A based on the power line carrier communication mode. Machine A needs to upload data to the server, so machine A, i.e., the first monitoring terminal, is set to include a wireless communication module (such as a GPRS or 4G module) that communicates with the server, and the wireless communication module is used to send the monitoring data of the first and second monitoring terminals to the server together. Machines A and B synchronize time during initialization and add timestamps to the monitoring data, so that the time consistency of the data can be guaranteed and the calculation reliability of the server can be guaranteed.

[0038] The power supplies of the A and B machines are respectively connected to the neutral line and any phase of the ABC three-phase cable to obtain one-phase AC power supply. For example, in this embodiment, the power supplies of the A and B machines are both A-phase 220V AC.

[0039] Preferably, machine A also includes an RS232 / 485 communication interface for transmitting the monitoring data to the transmission ring monitoring system via the base station intelligent field supervision unit (FSU, Field Supervision Unit).

[0040] refer to Figure 2 The first monitoring terminal, namely, machine A, includes:

[0041] 1) Voltage test channel, used to obtain three-phase voltage U 2A , U 2B , U 2C And the neutral line to ground voltage U NG .

[0042] The voltage interface of the voltage test channel is connected to the three-phase cable, the neutral line and the grounding line through the voltage test line. Specifically, the voltage test line is connected to the incoming terminals of the ABC three-phase cable and the N neutral line on the incoming side of the distribution box circuit breaker.

[0043] Among them, U 2A It is the difference between the test voltages of the two voltage test wires connected to the A-phase cable and the N-phase neutral wire respectively. 2B It is the difference between the test voltages of the two voltage test wires connected to the B-phase cable and the N-phase neutral wire respectively. 2C It is the difference between the test voltages of the two voltage test wires connected to the C-phase cable and the N-phase neutral wire respectively. NG It is the difference between the test voltages of the two voltage test lines of the N phase neutral line and the G phase grounding line.

[0044] 2) Current test channel, used to obtain three-phase current I a ,I b ,I c .

[0045] The current interface of the current test channel is connected to one end of the current test line, and the other end of the current test line is respectively connected to the three-phase cable through the current sensor. Specifically, the three current sensors are sheathed outside the ABC three-phase cable on the incoming line side of the distribution box circuit breaker.

[0046] 3) Temperature test channel, used to obtain the temperature of the ABC three-phase cable and the N-phase neutral line at the base station end.

[0047] The temperature interface of the temperature test channel is connected to one end of the temperature test line, and the temperature sensor connected to the other end of the temperature test line is respectively fixed on the ABC three-phase cable and the neutral line. Specifically, the three temperature sensors are fixed on the ABC three-phase cable and the N-phase neutral line on the incoming side of the distribution box circuit breaker through fixing belts.

[0048] The voltage test channel mainly includes some voltage signal processing circuits, such as amplification, filtering circuits, etc. Similarly, the current test channel mainly includes some current signal processing circuits. The temperature test channel mainly includes some temperature signal processing circuits.

[0049] refer to Figure 3 The second monitoring terminal, namely, the B terminal, includes:

[0050] 1) Voltage test channel, used to obtain three-phase voltage U 1A , U 1B , U 1C And the neutral voltage U N .

[0051] The voltage interface of the voltage test channel is connected to the three-phase cable, the neutral wire and the ground wire respectively through the voltage test wire. Specifically, the voltage test wire is connected to the outgoing terminals of the ABC three-phase cable and the N-phase neutral wire on the outgoing side of the distribution box circuit breaker respectively.

[0052] Among them, U 1A It is the difference between the test voltages of the two voltage test wires connected to the A-phase cable and the N-phase neutral wire respectively. 1B It is the difference between the test voltages of the two voltage test wires connected to the B-phase cable and the N-phase neutral wire respectively. 1C It is the difference between the test voltages of the two voltage test wires connected to the C-phase cable and the N-phase neutral wire respectively. N It is the neutral line voltage of the N phase neutral line. Because the voltage of the N phase neutral line and the G grounding line are consistent at the distribution room end, there is no need to connect the G grounding line to the B machine like the A machine.

[0053] 2) Current test channel, used to obtain the neutral current I n .

[0054] The current interface of the current test channel is connected to one end of the current test line, and the other end of the current test line is connected to the neutral line through a current sensor. Specifically, the current sensor is sleeved outside the N-phase neutral line on the outgoing side of the distribution box circuit breaker.

[0055] It should be noted that the current of the same cable at the base station end and the distribution room end is the same, so in theory, in order to obtain all the currents I of the three-phase four-wire a ,I b ,I c ,I n , only the current I a ,I b ,I c ,I n The monitoring task can be assigned to either machine A or machine B. In this embodiment, considering the convenience of wiring, the assigned machine A obtains the three-phase current Ia ,I b ,I c , machine B obtains the neutral current I n .

[0056] 3) Temperature test channel, used to obtain the temperature of the ABC three-phase cable at the distribution room end.

[0057] It is connected to one end of the temperature interface of the temperature test line, and the temperature sensor connected to the other end of the temperature test line is fixed on the ABC three-phase cable respectively. The temperature sensor is fixed on the ABC three-phase cable on the outgoing side of the distribution box circuit breaker through a fixing belt.

[0058] After obtaining the monitoring data, the server mainly analyzes the following four indicators:

[0059] 1) Cable voltage drop

[0060] First, based on the three-phase current I of the three-phase cable monitored by the first monitoring terminal a ,I b ,I c , calculate the current phase angle of the neutral line Specific:

[0061]

[0062] Among them, K1, K2, and K3 are coefficients, and it is recommended to take 0.5, 0.5, and 0.866 respectively.

[0063] Then, based on the current phase angle And the neutral line to ground voltage U monitored by the first monitoring terminal NG And three-phase voltage U 2A , U 2B , U 2c , calculate the voltage U of the three-phase cable to ground at the base station end AG , U BG , U CG . Specifically:

[0064]

[0065] Finally, calculate the three-phase voltage U monitored by the second monitoring terminal 1A , U 1B , U 1C The voltage U of the three-phase cable to ground at the base station AG , U BG , U CG The difference between the three-phase cable voltage drop ΔU A , ΔU B , ΔU C ,Right now:

[0066]

[0067] 2) Cable impedance

[0068] First, calculate the neutral line to ground voltage U monitored by the first monitoring terminal NG The neutral line voltage U monitored by the second monitoring terminal N The difference between the zero line drift voltage ΔU N ,Right now:

[0069] ΔU N =U NG -U N (4)

[0070] Then, calculate the cable voltage drop ΔU for the three-phase cable A , ΔU B , ΔU C and drift voltage ΔU N The corresponding monitored three-phase current I a ,I b ,I c and neutral current I n The ratio of the three-phase cable and the neutral line impedance Z is obtained. A , Z B , Z C , Z N ,Right now:

[0071]

[0072] Finally, calculate the impedance Z of the three-phase cable and the neutral line A , Z B , Z C , Z N The rated resistance R of the three-phase cable and the neutral line calculated correspondingly A , R B , R C , R N The ratio of the three-phase cable and the neutral line is obtained. A , η B , η C , η N ,Right now:

[0073]

[0074] The present invention fully considers the zero point drift caused by the load at the base station end, adopts the ground voltage method to calculate the voltage drop from the power distribution room end to the base station end of the cable, and solves the monitoring deviation caused by the zero point drift.

[0075] 3) Cable load factor

[0076] Specifically, calculate the monitored three-phase current I a ,I b ,I c and neutral current I n The rated current I of the corresponding three-phase cable and neutral line A ,I B ,I C and neutral current I N The ratio of the three-phase cable and the neutral line is obtained. A , δ B , δ C , δ N ,Right now:

[0077]

[0078] It should be noted that the I used in the above calculations a ,I b ,I c ,I n , U 1A , U 1B , U 1C , U N , U 2A , U 2B , U 2C , U NG All calculations are performed using effective values.

[0079] Preferably, the server can first determine whether the cable is overloaded based on the cable temperature, and then analyze and calculate the cable voltage drop, cable impedance, and cable load rate to determine whether the cable is overloaded.

[0080] Preferably, the server obtains the cable overload condition according to the analysis result, specifically including:

[0081] If any line in a three-phase four-wire cable has a cable voltage drop (ΔU A , ΔU B , ΔU C ), cable impedance (η A , η B , η C , η N ), cable load factor (δ A , δ B , δ C , δ N ) and cable temperature. When any of them exceeds the corresponding upper limit, it is judged as a serious overload, a serious alarm is issued and an immediate processing is notified. For example, the upper limits of cable voltage drop, cable impedance, cable load rate and cable temperature are: 20V, 150%, 150%, 60℃;

[0082] If any line in a three-phase four-wire cable has a cable voltage drop (ΔU A , ΔU B , ΔU C ), cable impedance (η A , η B , η C , η N ), cable load factor (δ A , δ B , δ C , δ N ) and cable temperature. When any of them exceeds the corresponding middle limit, it is judged as general overload, a general warning is issued, and a notification is given for recommended treatment. The middle limits of cable voltage drop, cable impedance, cable load factor, and cable temperature are: 15V, 120%, 120%, 50℃.

[0083] It can be understood that in this embodiment, temperature sensors are fixed on the ABC phase cables in the base station and the distribution room. When performing the above-mentioned overload analysis, as long as the temperature monitored by any temperature sensor exceeds the middle limit or the upper limit, it is considered that the cable is overloaded and the above-mentioned warning will be activated.

[0084] In summary, this embodiment can solve the cable safety problem caused by load fluctuations after the current existing base stations are transformed into 5G. By installing monitoring terminals at both ends of the cable distribution room and the base station, and taking full account of the N-phase zero drift caused by the base station load, the voltage-to-ground method is used to calculate the voltage drop from the distribution room end to the base station end of the cable. The temperature of the cable at the base station end is monitored in real time to effectively prevent the cable from catching fire. The degree of cable overload is judged by calculating the line voltage drop and the current compliance rate, providing a data basis for further load allocation.

[0085] Embodiment 2

[0086] refer to Figure 4 The present invention provides a method for monitoring cable overload in a communication base station, the execution subject is a server, and the method comprises:

[0087] S101: Acquire at least one monitoring data of voltage, current, and temperature at both ends of a three-phase four-wire cable monitored by two monitoring terminals respectively installed in a distribution box of a base station and a distribution box of a distribution room;

[0088] S102: Analyze at least one of the cable voltage drop, the cable impedance, the cable load rate, and the cable temperature according to the acquired monitoring data, and obtain the cable overload condition according to the analysis result.

[0089] In this embodiment, step S102 preferably analyzes the cable voltage drop, the cable impedance, the cable load rate and the cable temperature according to the acquired monitoring data.

[0090] Among them, the analysis of cable voltage drop includes:

[0091] Based on the three-phase current I of the three-phase cable monitored by the first monitoring terminal a ,I b ,I c , calculate the current phase angle of the neutral line Refer to the above calculation formula (1);

[0092] Based on the current phase angle And the neutral line to ground voltage U monitored by the first monitoring terminal NG And three-phase voltage U 2A , U 2B , U 2C , calculate the voltage U of the three-phase cable to ground at the base station end AG , U BG , U CG ; Refer to the above calculation formula (2);

[0093] Calculate the three-phase voltage U monitored by the second monitoring terminal 1A , U 1B , U 1C The voltage U of the three-phase cable to ground at the base station AG , U BG , U CG The difference between the three-phase cable voltage drop ΔU A , ΔU B , ΔU C , refer to the above calculation formula (3).

[0094] Among them, the analysis of cable impedance includes:

[0095] Calculate the neutral line to ground voltage U monitored by the first monitoring terminal NG The neutral line voltage U monitored by the second monitoring terminal N The difference between the zero line drift voltage ΔU N , refer to the above calculation formula (4);

[0096] Calculation of the cable voltage drop ΔU for three-phase cables A , ΔU B , ΔU C and drift voltage ΔU N The corresponding monitored three-phase current I a ,I b ,I c and neutral current I n The ratio of the three-phase cable and the neutral line impedance Z is obtained.A , Z B , Z C , Z N , refer to the above calculation formula (5);

[0097] Calculate the impedance Z of the three-phase cable and the neutral line A , Z B , Z C , Z N The rated resistance R of the three-phase cable and the neutral line calculated correspondingly A , R B , R C , R N The ratio of the three-phase cable and the neutral line is obtained. A , η B , η C , η N , refer to the above calculation formula (6).

[0098] The analysis of cable load rate includes: calculating the monitored three-phase current I a ,I b ,I c and neutral current I n The rated current I of the corresponding three-phase cable and neutral line A ,I B ,I C and neutral current I N The ratio of the three-phase cable and the neutral line is obtained. A , δ B , δ C , δ N , refer to the above calculation formula (7).

[0099] Preferably, obtaining the cable overload condition according to the analysis result specifically includes:

[0100] If any line in a three-phase four-wire cable has a cable voltage drop (ΔU A , ΔU B , ΔU C ), cable impedance (η A , η B , η C , η N ), cable load factor (δ A , δ B , δ C , δ N ) and cable temperature. When any of them exceeds the corresponding upper limit, it is judged as a serious overload, a serious alarm is issued and an immediate processing is notified. For example, the upper limits of cable voltage drop, cable impedance, cable load rate and cable temperature are: 20V, 150%, 150%, 60℃;

[0101] If any line in a three-phase four-wire cable has a cable voltage drop (ΔU A , ΔU B , ΔU C ), cable impedance (η A , η B , η C , η N ), cable load factor (δ A , δ B , δ C , δ N ) and cable temperature. When any of them exceeds the corresponding middle limit, it is judged as general overload, a general warning is issued, and a notification is given for recommended treatment. The middle limits of cable voltage drop, cable impedance, cable load factor, and cable temperature are: 15V, 120%, 120%, 50℃.

[0102] For more details, please refer to the above-mentioned embodiments, which will not be described in detail here.

[0103] Embodiment 3

[0104] This embodiment discloses a server, including a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the steps of the method described in Embodiment 2 are implemented. The specific implementation process can be referred to the description of the above method embodiment, which will not be repeated here.

[0105] Embodiment 4

[0106] This embodiment discloses a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the method described in Embodiment 2. The specific implementation process can be found in the description of the above method embodiment, which will not be repeated here.

[0107] In summary, the communication base station cable overload monitoring method and system, server, and storage medium of the present invention have the following beneficial effects: the present invention can monitor at least one of the voltage, current, and temperature at both ends of the three-phase four-wire cable in real time through two monitoring terminals installed in the distribution box of the base station and the distribution box of the distribution room. The server can analyze at least one of the cable voltage drop, cable impedance rate, cable load rate, and cable temperature according to the monitoring data obtained by the two monitoring terminals, and obtain the cable overload condition according to the analysis result, so as to facilitate the prediction of the occurrence of overload that may cause safety hazards, so that the load equipment can be managed in advance to avoid burning and fire accidents caused by overload and heating of the cable; moreover, on the one hand, the present invention can monitor the temperature of the cable at the base station end and the distribution room end, and can reflect the heating condition of the monitored cable in real time and intuitively, so as to effectively prevent the safety warning of cable fire, and on the other hand, through the calculation of the indicators of cable voltage drop, impedance rate, and cable load rate, the degree of cable overload can be judged, and a data basis can be provided for further load allocation.

[0108] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A method for monitoring cable overload in a communication base station, characterized in that: The method comprises: Acquire monitoring data of voltage and current at both ends of a three-phase four-wire cable monitored by a first monitoring terminal installed in a distribution box of a base station and a second monitoring terminal installed in a distribution box of a distribution room; According to the acquired monitoring data, the cable voltage drop and cable impedance are analyzed, and the cable overload situation is obtained according to the analysis results; The analysis of the cable impedance ratio specifically includes: calculating the neutral line to ground voltage U monitored by the first monitoring terminal NG The neutral line voltage U monitored by the second monitoring terminal N The difference between the zero line drift voltage ΔU N ; Calculate the cable voltage drop ΔU for three-phase cables A , ΔU B , ΔU C and drift voltage ΔU N The corresponding monitored three-phase current I a ,I b ,I c and neutral current I n The ratio of the three-phase cable and the neutral line impedance Z is obtained. A , Z B , Z C , Z N ; Calculate the impedance Z of the three-phase cable and the neutral line A , Z B , Z C , Z N The rated resistance R of the three-phase cable and the neutral line calculated correspondingly A , R B , R C , R N The ratio of the three-phase cable and the neutral line is obtained. A , η B , η C , η N .

2. The method according to claim 1, characterized in that The analysis of cable voltage drop specifically includes: Based on the three-phase current I of the three-phase cable monitored by the first monitoring terminal a ,I b ,I c , calculate the current phase angle of the neutral line Based on the current phase angle And the neutral line to ground voltage U monitored by the first monitoring terminal NG And three-phase voltage U 2A , U 2B , U 2C , calculate the voltage U of the three-phase cable to ground at the base station end AG , U BG , U CG ; Calculate the three-phase voltage U monitored by the second monitoring terminal 1A , U 1B , U 1C The voltage U of the three-phase cable to ground at the base station AG , U BG , U CG The difference between the three-phase cable voltage drop ΔU A , ΔU B , ΔU C .

3. The method according to claim 1, characterized in that The method further comprises: The cable load rate is analyzed according to the acquired monitoring data, and the cable load rate analysis includes: calculating the monitored three-phase current I a ,I b ,I c and neutral current I n The rated current I of the corresponding three-phase cable and neutral line A ,I B ,I C and neutral current I N The ratio of the three-phase cable and the neutral line is obtained. A ,δ B ,δ C ,δ N .

4. The method according to claim 1, characterized in that: The method further includes: acquiring monitoring data of the temperature of the three-phase four-wire cable monitored by a first monitoring terminal installed in a distribution box of the base station and a second monitoring terminal installed in a distribution box of a distribution room; The obtaining of the cable overload condition according to the analysis result specifically includes: If any of the cable voltage drop, cable impedance, cable load rate and cable temperature in any of the three-phase four-wire cables exceeds the corresponding upper limit, it is judged to be severely overloaded, a severe alarm is issued and a notification is given for immediate processing; If any one of the cable voltage drop, cable impedance, cable load rate and cable temperature in any line of the three-phase four-wire cable exceeds the corresponding middle limit value, it is judged as a general overload, a general warning is issued and a notification is given for recommended processing.

5. A server, characterized in that: The method comprises a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 4 are implemented.

6. A storage medium, characterized in that: A computer program is stored, and when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

7. A communication base station cable overload monitoring system, characterized in that: It includes a server and a first monitoring terminal installed in a distribution box of a base station and a second monitoring terminal installed in a distribution box of a distribution room, respectively. The first monitoring terminal and the second monitoring terminal both include a voltage test channel and a current test channel. The first monitoring terminal and the second monitoring terminal are used to monitor the voltage and current at both ends of a three-phase four-wire cable and send the monitoring data to the server. The server is used to execute the steps of the method described in any one of claims 1 to 4.

8. The system according to claim 7, characterized in that A communication connection is established between the first monitoring terminal and the second monitoring terminal via a power line carrier communication method. The second monitoring terminal sends monitoring data to the first monitoring terminal based on the power line carrier communication method. The first monitoring terminal includes a wireless communication module for communicating with the server. The wireless communication module is used to send the monitoring data of the first monitoring terminal and the second monitoring terminal to the server together.

9. The system according to claim 7, characterized in that The first monitoring terminal and the second monitoring terminal both include a temperature test channel; the first monitoring terminal and the second monitoring terminal are also used to monitor the temperature of the three-phase four-wire cable and send the monitoring data to the server, so that the server can obtain the cable overload condition according to the analysis result; The first monitoring terminal includes: a voltage test channel, which is connected to the three-phase cable, the neutral line and the ground line through the voltage test line, and is used to obtain the three-phase voltage U 2A , U 2B , U 2C And the neutral line to ground voltage U NG ; Current test channel, which is connected to one end of the current test line, and the other end of the current test line is connected to the three-phase cable through the current sensor to obtain the three-phase current I a ,I b ,I c A temperature test channel is connected to one end of the temperature test line. The temperature sensor connected to the other end of the temperature test line is fixed on the three-phase cable and the neutral line respectively, so as to obtain the temperature of the three-phase cable and the neutral line at the base station end. The second monitoring terminal includes: a voltage test channel, which is connected to the three-phase cable, the neutral line and the ground line through the voltage test line, and is used to obtain the three-phase voltage U 1A , U 1B , U 1C And the neutral voltage U N ; Current test channel, which is connected to one end of the current test line, and the other end of the current test line is connected to the neutral line through the current sensor to obtain the neutral line current I n A temperature test channel is connected to one end of a temperature test line. The temperature sensors connected to the other end of the temperature test line are fixed on the three-phase cables and are used to obtain the temperature of the three-phase cables at the distribution room end.

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