CN111812389A - Communication base station cable overload monitoring method and system, server and storage medium - Google Patents
Communication base station cable overload monitoring method and system, server and storage medium Download PDFInfo
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- CN111812389A CN111812389A CN202010666407.3A CN202010666407A CN111812389A CN 111812389 A CN111812389 A CN 111812389A CN 202010666407 A CN202010666407 A CN 202010666407A CN 111812389 A CN111812389 A CN 111812389A
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Abstract
The invention discloses a method and a system for monitoring overload of a communication base station cable, a server and a storage medium, wherein the system comprises the server and two monitoring terminals, each monitoring terminal comprises at least one of a voltage testing channel, a current testing channel and a temperature testing channel, the two monitoring terminals are respectively arranged on a distribution box of a base station and a distribution box of a distribution room, the two monitoring terminals are used for monitoring at least one of voltage, current and temperature at two ends of a three-phase four-wire cable and sending monitoring data to the server, the server is used for analyzing at least one of cable voltage drop, cable impedance rate, cable load rate and cable temperature according to the obtained monitoring data and obtaining the overload condition of the cable according to an analysis result, so that the occurrence of overload which can possibly generate potential safety hazards can be pre-judged, and load equipment can be well controlled in advance, avoid the cable to appear the burning out and the fire accident that the overload generates heat and leads to.
Description
Technical Field
The invention relates to the field of communication, in particular to a method and a system for monitoring overload of a communication base station cable, a server and a storage medium.
Background
With the continuous promotion of the application of 5G communication technology, a considerable part of communication base stations need to be modified by 5G added with 5G equipment. Most base station ends are far away from the commercial power distribution room end by more than one hundred meters or even more than several hundred meters, and are basically buried underground, if commercial power cables are laid again, a pipe network needs to be excavated, the construction period is long, the cost is high, and therefore the power supply line is difficult to reform. Because the 5G equipment has extremely high power consumption, the average load and the load fluctuation of the power consumption of the base station are greatly increased, the original commercial power supply circuit is overwhelmed, the cable generates heat seriously, and even a fire accident occurs.
At present, the electric overload protection is almost realized by installing an overcurrent protection device (such as a fuse, an air switch and the like). However, the devices do not have an early warning mechanism, once the devices are in effect, the whole power supply circuit is cut off, the base station is powered off, communication equipment stops swinging, larger communication faults are caused, and the safety requirements of the base station operation are not met.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method and a system for monitoring overload of a cable of a communication base station, a server, and a storage medium, aiming at the defect of protection hysteresis that the above-mentioned overcurrent protection scheme in the prior art can only start protection when overcurrent occurs.
The technical scheme adopted by the invention for solving the technical problems is as follows:
in one aspect, a method for monitoring overload of a cable of a communication base station is constructed, and the method comprises the following steps:
acquiring at least one monitoring data of voltage, current and temperature at two ends of a three-phase four-wire cable monitored by a first monitoring terminal of a distribution box of a base station and a second monitoring terminal of the distribution box of a distribution room respectively;
and analyzing 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 obtaining the cable overload condition according to the analysis result.
Preferably, the analyzing at least one of a cable voltage drop, a cable impedance ratio, a cable load ratio, and a cable temperature according to the acquired monitoring data includes: analyzing the cable voltage drop according to the acquired monitoring data, and analyzing the cable voltage drop includes:
three-phase current I of three-phase cable monitored based on first monitoring terminala、Ib、IcCalculating the current phase angle of the zero line
Based on the current phase angle
And the voltage U of the zero line to the ground monitored by the first monitoring terminalNGAnd three phase voltage U2A、U2B、U2CCalculating the voltage U to ground of the three-phase cable at the base station endAG、UBG、UCG；
Calculating the three-phase voltage U monitored by the second monitoring terminal1A、U1B、U1CVoltage to ground U at base station end with three-phase cableAG、UBG、UCGTo obtain the cable voltage drop delta U of the three-phase cableA、ΔUB、ΔUC。
Preferably, the analyzing at least one of a cable voltage drop, a cable impedance ratio, a cable load ratio, and a cable temperature according to the acquired monitoring data includes: analyzing the cable resistivity from the acquired monitoring data, and analyzing the cable resistivity includes:
calculating the voltage U of the zero line to the ground monitored by the first monitoring terminalNGThe zero line voltage U monitored by the second monitoring terminalNTo obtain the zero line drift voltage delta UN；
Calculating the cable voltage drop delta U of a three-phase cableA、ΔUB、ΔUCAnd drift voltage DeltaUNWith corresponding monitored three-phase currents Ia、Ib、IcAnd zero line current InObtaining the impedance Z of the three-phase cable and the zero lineA、ZB、ZC、ZN；
Calculating the impedance Z of a three-phase cable and a neutral lineA、ZB、ZC、ZNRated resistance R of three-phase cable and zero line obtained by corresponding calculationA、RB、RC、RNObtaining the impedance ratio eta of the three-phase cable and the zero lineA、ηB、ηC、ηN。
Preferably, the analyzing at least one of a cable voltage drop, a cable impedance ratio, a cable load ratio, and a cable temperature according to the acquired monitoring data includes: analyzing the cable load rate according to the acquired monitoring data, wherein the analyzing the cable load rate comprises: calculating the monitored three-phase current Ia、Ib、IcAnd zero line current InRated current I corresponding to three-phase cable and zero lineA、IB、ICAnd zero line current INObtaining the load factor of the three-phase cable and the zero lineA、B、C、N。
Preferably, the obtaining of the cable overload condition according to the analysis result specifically includes:
if any one of the cable voltage drop, the cable impedance rate, the cable load rate and the cable temperature in any one of the three-phase four-wire cables exceeds the respective corresponding high limit value, the serious overload is judged, a serious alarm is sent out, and immediate processing is informed;
and if any one of the cable voltage drop, the cable impedance rate, the cable load rate and the cable temperature in any line of the three-phase four-wire cable exceeds the corresponding middle limit value, the general overload is judged, and a general warning is sent out to inform the suggestion processing.
In a second aspect, a server is provided, comprising a processor and a memory, said memory storing a computer program which, when executed by the processor, carries out the steps of the method as described above.
In three aspects, a storage medium is constructed storing a computer program which, when executed by a processor, implements the steps of the method as previously described.
In a fourth aspect, a communication base station cable overload monitoring system is constructed, and the system includes a server, and a first monitoring terminal and a second monitoring terminal respectively installed on a distribution box of a base station and a distribution box of a distribution room, where the first monitoring terminal and the second monitoring terminal each include at least one of a voltage testing channel, a current testing channel, and a temperature testing channel, the first monitoring terminal and the second monitoring terminal are configured to monitor at least one of voltage, current, and temperature at two ends of a three-phase four-wire cable and send monitoring data to the server, and the server is configured to execute the steps of the method.
Preferably, the first monitoring terminal and the second monitoring terminal are in communication connection through a power line carrier communication mode, the second monitoring terminal sends monitoring data to the first monitoring terminal based on the power line carrier communication mode, the first monitoring terminal comprises a wireless communication module communicated with the server, and the wireless communication module is used for sending the monitoring data of the first monitoring terminal and the monitoring data of the second monitoring terminal to the server.
Preferably, the first monitoring terminal includes: a voltage test channel connected with the three-phase cable, the zero line and the grounding wire through voltage test wires respectively for obtaining three-phase voltage U2A、U2B、U2CAnd zero line voltage to ground UNG(ii) a A current test channel connected with one end of the current test wire, the other end of the current test wire is respectively connected with the three-phase cable through a current sensor for obtaining a three-phase current Ia、Ib、Ic(ii) a The temperature testing channel is connected with one end of a temperature testing line, and temperature sensors connected with the other end of the temperature testing line are respectively fixed on the three-phase cable and the zero line and used for acquiring the temperature of the three-phase cable and the zero line at the base station end;
the second monitoring terminal includes: voltage testing deviceThe voltage test wires are respectively connected with the three-phase cable, the zero line and the grounding wire and are used for obtaining three-phase voltage U1A、U1B、U1CAnd zero line voltage UN(ii) a The current test channel is connected with one end of the current test wire, and the other end of the current test wire is connected to the zero line through the current sensor and used for obtaining zero line current In(ii) a And the temperature testing channel is connected with one end of the temperature testing line, and the temperature sensors connected with the other end of the temperature testing line are respectively fixed on the three-phase cable and used for acquiring the temperature of the three-phase cable at the power distribution room end.
The invention discloses a method and a system for monitoring overload of a communication base station cable, a server and a storage medium, and has the following beneficial effects: according to the invention, through the two monitoring terminals arranged on the distribution box of the base station and the distribution box of the distribution room, at least one of voltage, current and temperature at two ends of the three-phase four-wire cable can be monitored in real time, the server can analyze at least one of 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 that the overload occurrence of potential safety hazard can be pre-judged, the load equipment can be managed and controlled in advance, and the burning and fire accidents caused by overload heating of the cable can be avoided; in addition, the invention can intuitively reflect and monitor the heating condition of the cable in real time through monitoring the temperature of the cable at the base station end and the power distribution room end, effectively prevent the safety early warning of cable ignition, and judge the overload degree of the cable through the index calculation of the voltage drop, the impedance rate and the load rate of the cable, thereby providing data basis for further load allocation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts:
FIG. 1 is a schematic structural diagram of a cable overload monitoring system of a communication base station according to the present invention;
FIG. 2 is an installation schematic of a first monitoring terminal;
FIG. 3 is an installation schematic of a second monitoring terminal;
fig. 4 is a flow chart of the communication base station cable overload monitoring method of the invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Exemplary embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be understood that the embodiments and specific features in the embodiments of the present invention are described in detail in the present application, but not limited to the present application, and the features in the embodiments and specific features in the embodiments of the present invention may be combined with each other without conflict.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example one
Referring to fig. 1, the system for monitoring overload of a cable of a communication base station according to the present invention includes a server, and a first monitoring terminal and a second monitoring terminal. First monitor terminal, second monitor terminal all include at least one in voltage test passageway, current test passageway, the temperature test passageway, and first monitor terminal installs the block terminal at the basic station, and second monitor terminal installs the block terminal at the power distribution room, and first monitor terminal, second monitor terminal are used for monitoring at least one in voltage, electric current, the temperature at three-phase four-wire cable both ends and will monitor data transmission for the server, the server is used for according to the monitoring data who acquires, and analysis cable voltage drop, at least one in cable impedance rate, cable load rate and the cable temperature obtains the cable overload condition according to the analysis result.
Theoretically, the monitoring data of the first monitoring terminal and the second monitoring terminal can be sent to the server independently, and in order to ensure that the data are at the same time, timestamps can be added to the monitoring data respectively. In this embodiment, preferably, the first monitoring terminal and the second monitoring terminal communicate with each other, and upload data through one of the monitoring terminals. Specifically, the first monitoring terminal is configured as a master machine and is temporarily recorded as an a machine, and the second monitoring terminal is configured as a slave machine and is temporarily recorded as a B machine. The A machine and the B machine establish communication connection in a power line carrier communication (PLC) mode. And the B machine sends the monitoring data to the A machine based on a power line carrier communication mode. The machine a needs to upload data to the server, and therefore the machine a, that is, the first monitoring terminal, is configured to include a wireless communication module (such as a GPRS or 4G module) that communicates with the server, where the wireless communication module is configured to send the monitoring data of the first and second monitoring terminals to the server together. A. The machine B synchronizes time during initialization and adds a time stamp to the monitoring data, so that the time consistency of the data can be ensured, and the calculation reliability of the server is ensured.
The power supplies of the machine A and the machine B are respectively connected with any one of a zero line and an ABC three-phase cable so as to supply power to a one-phase alternating current power supply. For example, in this embodiment, the power supplies of the machine a and the machine B are both a phase 220V ac power.
Preferably, the machine a further comprises an RS232/485 communication interface for transmitting the monitoring data to the loop monitoring system via a base station intelligent dynamic loop monitoring Unit (FSU).
Referring to fig. 2, the first monitor terminal, i.e., a-machine, includes:
1) voltage test channel for obtaining three-phase voltage U2A、U2B、U2CAnd zero line voltage to ground UNG。
The voltage interface of the voltage testing channel is respectively connected with the three-phase cable, the zero line and the grounding wire through a voltage testing wire, and particularly, the voltage testing wire is respectively connected with the ABC three-phase cable on the wire inlet side of the distribution box circuit breaker and the wire inlet terminals of the N zero line.
Wherein, U2AThe difference between the test voltages of two voltage test lines connected to the A-phase cable and the N-phase zero line is shown. U shape2BThe difference between the test voltages of two voltage test lines connected with the B-phase cable and the N-phase zero line is respectively. U shape2CThe difference between the test voltages of the two voltage test lines connected with the C-phase cable and the N-phase zero line is respectively. U shapeNGIs the difference between the test voltage of the two voltage test wires of the N-phase zero line and the G grounding line.
2) Current test channel for obtaining three-phase current Ia、Ib、Ic。
The current interface of current test passageway is connected with the one end of current test line, and the other end of current test line passes through current sensor and inserts the three-phase cable respectively, and is specific, and three current sensor overlaps outside the ABC three-phase cable of block terminal circuit breaker's incoming line side.
3) And the temperature testing channel is used for obtaining the temperature of the ABC three-phase cable and the N-phase zero line at the base station end.
The temperature interface of temperature test passageway is connected with the one end of temperature test line, and the temperature sensor that the other end of temperature test line is connected is fixed respectively on ABC three-phase cable, zero line, specifically, three temperature sensor passes through the fixed band to be fixed on ABC three-phase cable, the N looks zero line of the incoming line side of block terminal circuit breaker.
The voltage test channel mainly comprises some voltage signal processing circuits, such as amplifying circuits, filtering circuits and the like. Similarly, the current test channel mainly comprises a plurality of current signal processing circuits. The temperature test channel mainly comprises a plurality of temperature signal processing circuits.
Referring to fig. 3, the second monitoring terminal, i.e., the B-machine, includes:
1) voltage test channel for obtaining three-phase voltage U1A、U1B、U1CAnd zero line voltage UN。
The voltage interface of the voltage test channel is respectively connected with the three-phase cable, the zero line and the grounding wire through a voltage test line, and particularly, the voltage test line is respectively connected with the ABC three-phase cable on the outgoing line side of the distribution box circuit breaker and the outgoing line terminal of the N-phase zero line.
Wherein, U1AThe difference between the test voltages of two voltage test lines connected to the A-phase cable and the N-phase zero line is shown. U shape1BThe difference between the test voltages of two voltage test lines connected with the B-phase cable and the N-phase zero line is respectively. U shape1CThe difference between the test voltages of the two voltage test lines connected with the C-phase cable and the N-phase zero line is respectively. U shapeNThe voltage of the zero line is consistent with that of the N-phase zero line, and the voltage of the N-phase zero line is consistent with that of the G grounding line at the power distribution room end, so that the B machine does not need to be connected with the G grounding line like the A machine.
2) A current test channel for obtaining zero line current In。
The current interface of current test passageway is connected with the one end of current test line, and the other end of current test line passes through current sensor access zero line, specifically, current sensor overlaps outside the N looks zero line of the outgoing line side of block terminal circuit breaker.
It should be noted that the currents of the same cable at the base station side and the distribution room side are identical, so in theory, in order to obtain all the currents I of the three-phase four-wirea、Ib、Ic、InOnly the current I needs to be adjusteda、Ib、Ic、InThe monitoring task of (2) is distributed to A, B machines. In the embodiment, considering the convenience of wiring, the distributed machine A obtains the three-phase current Ia、Ib、IcThe machine B obtains the current I of the zero linen。
3) And the temperature testing channel is used for acquiring the temperature of the ABC three-phase cable at the power distribution room end.
The temperature sensor is connected with one end of a temperature interface of a temperature test line, the temperature sensor connected with the other end of the temperature test line is fixed on the ABC three-phase cable respectively, and the temperature sensor is fixed on the ABC three-phase cable on the outgoing line side of the distribution box breaker through a fixing band.
After the server acquires the monitoring data, the following four indexes are mainly analyzed:
1) cable voltage drop
Firstly, based on the three-phase current I of the three-phase cable monitored by the first monitoring terminala、Ib、IcCalculating the current phase angle of the zero line
Specifically, the method comprises the following steps:
wherein K1, K2 and K3 are coefficients, and 0.5, 0.5 and 0.866 are suggested respectively.
Then, based on the current phase angle
And the voltage U of the zero line to the ground monitored by the first monitoring terminalNGAnd three phase voltage U2A、U2B、U2cCalculating the voltage U to ground of the three-phase cable at the base station endAG、UBG、UCG. Specifically, the method comprises the following steps:
finally, the three-phase voltage U monitored by the second monitoring terminal is calculated1A、U1B、U1CVoltage to ground U at base station end with three-phase cableAG、UBG、UCGTo obtain the cable voltage drop delta U of the three-phase cableA、ΔUB、ΔUCNamely:
2) impedance ratio of cable
Firstly, calculating the voltage to ground of the zero line monitored by a first monitoring terminalUNGThe zero line voltage U monitored by the second monitoring terminalNTo obtain the zero line drift voltage delta UNNamely:
ΔUN＝UNG-UN(4)
then, the cable voltage drop Δ U of the three-phase cable is calculatedA、ΔUB、ΔUCAnd drift voltage DeltaUNWith corresponding monitored three-phase currents Ia、Ib、IcAnd zero line current InObtaining the impedance Z of the three-phase cable and the zero lineA、ZB、ZC、ZNNamely:
finally, the impedance Z of the three-phase cable and the zero line is calculatedA、ZB、ZC、ZNRated resistance R of three-phase cable and zero line obtained by corresponding calculationA、RB、RC、RNObtaining the impedance ratio eta of the three-phase cable and the zero lineA、ηB、ηC、ηNNamely:
the invention fully considers zero drift caused by the load of the base station end, adopts a voltage-to-ground method to calculate the voltage drop from the power distribution room end of the cable to the base station end, and solves the monitoring deviation caused by the zero drift.
3) Rate of cable loading
In particular, the monitored three-phase current I is calculateda、Ib、IcAnd zero line current InRated current I corresponding to three-phase cable and zero lineA、IB、ICAnd zero line current INObtaining the load factor of the three-phase cable and the zero lineA、B、C、NNamely:
note that I used in the above calculationa、Ib、Ic、In、U1A、U1B、U1C、UN、U2A、U2B、U2C、UNGAll are calculated using the valid values.
Preferably, the server can preferentially judge whether the cable is overloaded according to the temperature of the cable, and then judge whether the cable is overloaded by matching with the voltage drop of the cable, the impedance rate of the cable and the load rate of the cable through analysis and calculation. In this embodiment, the server
Preferably, the server obtains the cable overload condition according to the analysis result, and specifically includes:
if the cable voltage drop (Δ U) is in any of the three-phase four-wire cablesA、ΔUB、ΔUC) Cable impedance ratio (eta)A、ηB、ηC、ηN) Cable load factor: (A、B、C、N) And cable temperature, either of which exceeds the respective corresponding high limit value to determine severe overload, issue a severe alarm and notify immediate processing. For example, the respective corresponding upper limit values of the cable voltage drop, the cable impedance ratio, the cable load ratio and the cable temperature are: 20V, 150%, 60 ℃;
if the cable voltage drop (Δ U) is in any of the three-phase four-wire cablesA、ΔUB、ΔUC) Cable impedance ratio (eta)A、ηB、ηC、ηN) Cable load factor: (A、B、C、N) And cable temperature, either of which exceeds the respective corresponding intermediate limit value to determine a general overload, issue a general warning and notify a recommended treatment. The medium limit values corresponding to the cable voltage drop, the cable impedance ratio, the cable load ratio and the cable temperature are as follows: 15V, 120%, 50 ℃.
It can be understood that in this embodiment, temperature sensors are fixed to the ABC phase cable at both the base station and the power distribution room, and when the overload analysis is performed, the early warning will be started as long as the temperature monitored by any one of the temperature sensors exceeds the middle limit value or the high limit value belongs to the cable overload.
To sum up, this embodiment can solve present basic station 5G and reform transform the back, and the load fluctuation causes the cable safety problem, through the room of distributing power at the cable both ends, base station both ends installation monitor terminal, and fully consider the N looks zero drift that base station end load caused, adopt the method to the ground voltage, calculate the voltage drop of distributing power room end to the base station end of cable, preferentially through the temperature monitoring at base station end cable, the real time monitoring cable condition of generating heat, accomplish the effectual safety precaution that takes precautions against the cable and catch fire. And judging the overload degree of the cable by calculating the line voltage drop and the current coincidence rate, and providing a data basis for further load allocation.
Example two
Referring to fig. 4, an execution subject of the method for monitoring overload of a communication base station cable according to the present invention is a server, and the method includes:
s101: acquiring at least one monitoring data of voltage, current and temperature at two ends of a three-phase four-wire cable, wherein the monitoring data are respectively arranged on two monitoring terminals of a distribution box of a base station and a distribution box of a distribution room;
s102: and analyzing 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 obtaining the cable overload condition according to the analysis result.
In this embodiment, step S102 preferably analyzes the cable voltage drop, the cable impedance ratio, the cable load ratio, and the cable temperature according to the acquired monitoring data.
Wherein analyzing the cable voltage drop comprises:
three-phase current I of three-phase cable monitored based on first monitoring terminala、Ib、IcCalculating the current phase angle of the zero line
Refer to the above equation (1);
based on the current phase angle
And the voltage U of the zero line to the ground monitored by the first monitoring terminalNGAnd three phase voltage U2A、U2B、U2CCalculating the voltage U to ground of the three-phase cable at the base station endAG、UBG、UCG(ii) a Refer to the above equation (2);
calculating the three-phase voltage U monitored by the second monitoring terminal1A、U1B、U1CVoltage to ground U at base station end with three-phase cableAG、UBG、UCGTo obtain the cable voltage drop delta U of the three-phase cableA、ΔUB、ΔUCRefer to the above equation (3).
Wherein analyzing the cable resistivity comprises:
calculating the voltage U of the zero line to the ground monitored by the first monitoring terminalNGThe zero line voltage U monitored by the second monitoring terminalNTo obtain the zero line drift voltage delta UNRefer to the above equation (4);
calculating the cable voltage drop delta U of a three-phase cableA、ΔUB、ΔUCAnd drift voltage DeltaUNWith corresponding monitored three-phase currents Ia、Ib、IcAnd zero line current InObtaining the impedance Z of the three-phase cable and the zero lineA、ZB、ZC、ZNRefer to the above equation (5);
calculating the impedance Z of a three-phase cable and a neutral lineA、ZB、ZC、ZNRated resistance R of three-phase cable and zero line obtained by corresponding calculationA、RB、RC、RNObtaining the impedance ratio eta of the three-phase cable and the zero lineA、ηB、ηC、ηNRefer to the above equation (6).
Wherein analyzing the cable load factor comprises: calculating the monitored three-phase current Ia、Ib、IcAnd zero line current InRated current I corresponding to three-phase cable and zero lineA、IB、ICAnd zero line current INObtaining the load factor of the three-phase cable and the zero lineA、B、C、NReference is made to the above equation (7).
Preferably, the obtaining of the cable overload condition according to the analysis result specifically includes:
if the cable voltage drop (Δ U) is in any of the three-phase four-wire cablesA、ΔUB、ΔUC) Cable impedance ratio (eta)A、ηB、ηC、ηN) Cable load factor: (A、B、C、N) And cable temperature, either of which exceeds the respective corresponding high limit value to determine severe overload, issue a severe alarm and notify immediate processing. For example, the respective corresponding upper limit values of the cable voltage drop, the cable impedance ratio, the cable load ratio and the cable temperature are: 20V, 150%, 60 ℃;
if the cable voltage drop (Δ U) is in any of the three-phase four-wire cablesA、ΔUB、ΔUC) Cable impedance ratio (eta)A、ηB、ηC、ηN) Cable load factor: (A、B、C、N) And cable temperature, either of which exceeds the respective corresponding intermediate limit value to determine a general overload, issue a general warning and notify a recommended treatment. The medium limit values corresponding to the cable voltage drop, the cable impedance ratio, the cable load ratio and the cable temperature are as follows: 15V, 120%, 50 ℃.
For more details, reference may be made to a part of the above embodiments, which are not described herein again.
EXAMPLE III
The present embodiment discloses a server comprising a processor and a memory, said memory storing a computer program which, when executed by the processor, performs the steps of the method according to embodiment two. The specific implementation process may refer to the description of the above method embodiment, and is not described herein again.
Example four
The present embodiment discloses a computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to embodiment two. The specific implementation process may refer to the description of the above method embodiment, and is not described herein again.
In summary, the method and system for monitoring overload of communication base station cable, the server, and the storage medium of the present invention have the following advantages: according to the invention, through the two monitoring terminals arranged on the distribution box of the base station and the distribution box of the distribution room, at least one of voltage, current and temperature at two ends of the three-phase four-wire cable can be monitored in real time, the server can analyze at least one of 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 that the overload occurrence of potential safety hazard can be pre-judged, the load equipment can be managed and controlled in advance, and the burning and fire accidents caused by overload heating of the cable can be avoided; in addition, the invention can intuitively reflect and monitor the heating condition of the cable in real time through monitoring the temperature of the cable at the base station end and the power distribution room end, effectively prevent the safety early warning of cable ignition, and judge the overload degree of the cable through the index calculation of the voltage drop, the impedance rate and the load rate of the cable, thereby providing data basis for further load allocation.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method for monitoring overload of a cable of a communication base station, the method comprising:
acquiring at least one monitoring data of voltage, current and temperature at two ends of a three-phase four-wire cable monitored by a first monitoring terminal of a distribution box of a base station and a second monitoring terminal of the distribution box of a distribution room respectively;
and analyzing 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 obtaining the cable overload condition according to the analysis result.
2. The method of claim 1, wherein analyzing at least one of a cable pressure drop, a cable impedance rate, a cable load rate, and a cable temperature from the acquired monitoring data comprises: analyzing the cable voltage drop according to the acquired monitoring data, and analyzing the cable voltage drop includes:
three-phase current I of three-phase cable monitored based on first monitoring terminala、Ib、IcCalculating the current phase angle of the zero line
Based on the current phase angle
And the voltage U of the zero line to the ground monitored by the first monitoring terminalNGAnd three phase voltage U2A、U2B、U2CCalculating the voltage U to ground of the three-phase cable at the base station endAG、UBG、UCG；
Calculating the three-phase voltage U monitored by the second monitoring terminal1A、U1B、U1CVoltage to ground U at base station end with three-phase cableAG、UBG、UCGTo obtain the cable voltage drop delta U of the three-phase cableA、ΔUB、ΔUC。
3. The method of claim 2, wherein analyzing at least one of a cable pressure drop, a cable impedance rate, a cable load rate, and a cable temperature from the acquired monitoring data comprises: analyzing the cable resistivity from the acquired monitoring data, and analyzing the cable resistivity includes:
calculating the voltage U of the zero line to the ground monitored by the first monitoring terminalNGThe zero line voltage U monitored by the second monitoring terminalNTo obtain the zero line drift voltage delta UN；
Calculating the cable voltage drop delta U of a three-phase cableA、ΔUB、ΔUCAnd drift voltage DeltaUNWith corresponding monitored three-phase currents Ia、Ib、IcAnd zero line current InObtaining the impedance Z of the three-phase cable and the zero lineA、ZB、ZC、ZN；
Calculating the impedance Z of a three-phase cable and a neutral lineA、ZB、ZC、ZNRated resistance R of three-phase cable and zero line obtained by corresponding calculationA、RB、RC、RNObtaining the impedance ratio eta of the three-phase cable and the zero lineA、ηB、ηC、ηN。
4. The method of claim 1, wherein analyzing at least one of a cable pressure drop, a cable impedance rate, a cable load rate, and a cable temperature from the acquired monitoring data comprises: analyzing the cable load rate according to the acquired monitoring data, wherein the analyzing the cable load rate comprises: calculating the monitored three-phase current Ia、Ib、IcAnd zero line current InRated current I corresponding to three-phase cable and zero lineA、IB、ICAnd zero line current INObtaining the load factor of the three-phase cable and the zero lineA、B、C、N。
5. The method according to claim 1, wherein obtaining the cable overload condition based on the analysis result specifically comprises:
if any one of the cable voltage drop, the cable impedance rate, the cable load rate and the cable temperature in any one of the three-phase four-wire cables exceeds the respective corresponding high limit value, the serious overload is judged, a serious alarm is sent out, and immediate processing is informed;
and if any one of the cable voltage drop, the cable impedance rate, the cable load rate and the cable temperature in any line of the three-phase four-wire cable exceeds the corresponding middle limit value, the general overload is judged, and a general warning is sent out to inform the suggestion processing.
6. A server, characterized by comprising a processor and a memory, said memory storing a computer program which, when executed by the processor, carries out the steps of the method according to any one of claims 1-5.
7. A storage medium, characterized in that a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1-5.
8. A communication base station cable overload monitoring system is characterized by comprising a server, and a first monitoring terminal and a second monitoring terminal which are respectively installed on a distribution box of a base station and a distribution box of a distribution room, wherein the first monitoring terminal and the second monitoring terminal respectively comprise at least one of a voltage testing channel, a current testing channel and a temperature testing channel, the first monitoring terminal and the second monitoring terminal are used for monitoring at least one of voltage, current and temperature at two ends of a three-phase four-wire cable and sending monitoring data to the server, and the server is used for executing the steps of the method according to any one of claims 1-5.
9. The system according to claim 8, wherein a communication connection is established between the first monitoring terminal and the second monitoring terminal through a power line carrier communication mode, the second monitoring terminal sends monitoring data to the first monitoring terminal based on the power line carrier communication mode, the first monitoring terminal comprises a wireless communication module which is communicated with the server, and the wireless communication module is used for sending the monitoring data of the first monitoring terminal and the second monitoring terminal to the server together.
10. The system of claim 8,
the first monitoring terminal includes: a voltage test channel connected with the three-phase cable, the zero line and the grounding wire through voltage test wires respectively for obtaining three-phase voltage U2A、U2B、U2CAnd zero line voltage to ground UNG(ii) a A current test channel connected with one end of the current test wire, the other end of the current test wire is respectively connected with the three-phase cable through a current sensor for obtaining a three-phase current Ia、Ib、Ic(ii) a The temperature testing channel is connected with one end of a temperature testing line, and temperature sensors connected with the other end of the temperature testing line are respectively fixed on the three-phase cable and the zero line and used for acquiring the temperature of the three-phase cable and the zero line at the base station end;
the second monitoring terminal includes: the voltage test channel is respectively connected with the three-phase cable, the zero line and the grounding wire through voltage test wires and is used for acquiring three-phase voltage U1A、U1B、U1CAnd zero line voltage UN(ii) a The current test channel is connected with one end of the current test wire, and the other end of the current test wire is connected to the zero line through the current sensor and used for obtaining zero line current In(ii) a And the temperature testing channel is connected with one end of the temperature testing line, and the temperature sensors connected with the other end of the temperature testing line are respectively fixed on the three-phase cable and used for acquiring the temperature of the three-phase cable at the power distribution room end.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156236A (en) * | 2021-03-18 | 2021-07-23 | 广西电网有限责任公司 | Method and system for judging line overload of stability control device based on temperature change |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156236A (en) * | 2021-03-18 | 2021-07-23 | 广西电网有限责任公司 | Method and system for judging line overload of stability control device based on temperature change |
| CN113156236B (en) * | 2021-03-18 | 2023-06-09 | 广西电网有限责任公司 | Method and system for judging overload of circuit of stability control device based on temperature change |
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