CN116665393A - Electrical fire monitoring method and system - Google Patents

Abstract

The present application relates to an electrical fire monitoring method and system, and relates to the technical field of electrical equipment. The method includes obtaining electrical parameter information of electrical equipment in real time; the electrical parameter information includes current information and voltage information; the current information includes the first Characteristic current value; judging whether the first characteristic current value is greater than the upper threshold of the preset interval; if yes, then within the preset first time length, the second time length is obtained based on the sum of the time lengths in which the first characteristic current value is greater than the upper threshold ; Obtaining an overload ratio based on the second duration and the first duration; and, judging whether the overload ratio is greater than a preset ratio, and if so, sending overload information to an external terminal. The present application has the effect of facilitating the monitoring of electric equipment and taking corresponding actions based on the monitoring data, thereby reducing the possibility of fire occurrence.

Description

Method and system for monitoring electrical fire

technical field

The present application relates to the field of fire alarm technology, in particular to an electrical fire monitoring method and system.

Background technique

Power equipment brings many conveniences to people's lives in modern society. With the continuous development and expansion of power equipment, the application range of power is getting wider and wider, and the resulting power safety issues have also begun to be paid attention to.

In order to reduce the possibility of fires during the operation of electrical equipment, it is necessary to monitor the operating data of electrical equipment and take corresponding actions based on the monitoring data.

Contents of the invention

In order to facilitate the monitoring of electrical equipment and take corresponding actions based on monitoring data to reduce the possibility of fire, the present application provides an electrical fire monitoring method and system.

In the first aspect, an electrical fire monitoring method provided by the present application adopts the following technical solutions.

A method for monitoring an electrical fire, comprising:

Acquiring electrical parameter information of the power equipment in real time; the electrical parameter information includes current information and voltage information; the current information includes a first characteristic current value;

Judging whether the first characteristic current value is greater than the upper threshold of the preset interval; if yes, then obtaining a second duration based on the sum of the duration of the first characteristic current value greater than the upper threshold within the preset first duration;

obtaining an overload ratio based on a ratio of the second duration to the first duration; and,

Judging whether the overload ratio is greater than a preset ratio, if yes, sending overload information to an external terminal.

By adopting the above technical solution, the electrical parameter information in the electric equipment is collected, and based on the collected electric parameter information, it is judged whether the electric equipment is in an abnormal state. At this time, the processor sends overload information to the external terminal, and then the electric equipment Monitor and take corresponding actions based on the monitored data.

Optionally, the voltage information includes a voltage phase, and the current information also includes a current phase; after obtaining the electrical parameter information of the power equipment, it also includes:

obtaining a first power factor based on the voltage phase and the current phase;

Judging whether the first power factor is within a preset power factor interval; if not, sending first prompt information to the external terminal.

Optionally, if it is determined that the first power factor is not located after the preset power factor interval, the method further includes: Step S301, sending a first control signal to the reactive power compensation capacitor module; the first control signal A preset number of capacitors used to trigger the reactive power compensation capacitor module to work; the reactive power compensation capacitor module is connected in parallel to the electric equipment; the reactive power compensation capacitor module includes several capacitors connected in parallel with each other;

Step S302, after the reactive power compensation capacitor module runs for a preset time period, obtain a second power factor based on the current current phase and voltage phase;

Step S303, judging whether the second power factor is within the preset power factor interval; if yes, execute step S304; if not, execute step S305;

Step S304, sending the second prompt message to the external terminal;

Step S305, sending a second control signal to the reactive power compensation capacitor module; the second control signal is used to trigger the reactive power compensation capacitor module to increase the number of capacitors connected in parallel to the electric equipment one by one, and repeat steps S302～ S303.

Optionally, after determining that the second power factor is within the preset power factor range, the method further includes:

Obtaining the temperatures of several detection points of the electric equipment to obtain several detection temperature values;

deriving a temperature characteristic value based on a number of detected temperature values; and,

Judging whether the temperature characteristic value is greater than a preset value; if yes, sending a third prompt message to the external terminal.

Optionally, after it is determined that the temperature characteristic value is greater than a preset value, it further includes:

re-collecting the electrical parameter information of the electrical equipment;

obtaining a harmonic component in the voltage based on the voltage information in the electrical parameter information; and,

judging whether the harmonic component in the voltage is greater than a preset amplitude; if so, sending a third control signal to the rectification device of the electric equipment, the third control signal being used to trigger the rectification device to increase the rectification phase Count or increase the number of rectified pulses.

In the second aspect, an electrical fire monitoring method provided by the present application adopts the following technical solutions.

An electrical fire monitoring system, said system comprising:

The acquisition module is configured to: acquire electrical parameter information of electric equipment in real time; the electrical parameter information includes current information and voltage information; the current information includes a first characteristic current value;

The first processing module is used for: judging whether the first characteristic current value is greater than the upper threshold of the preset interval; if yes, within the preset first time duration based on the sum of the time lengths in which the first characteristic current value is greater than the upper threshold get the second duration;

A second processing module, configured to: obtain an overload ratio based on the second duration and the first duration; and,

The third processing module is used to: judge whether the overload ratio is greater than a preset ratio, and if so, send overload information to the external terminal; the overload information is used to trigger the external terminal to generate fire risk warning information.

Optionally, the voltage information includes a voltage phase, and the current information also includes a current phase; the system further includes:

The fourth processing module is configured to: obtain the first power factor based on the voltage phase and the current phase after obtaining the electrical parameter information of the electric equipment; and,

A fifth processing module, configured to: judge whether the first power factor is within a preset power factor interval; if not, send first prompt information to the external terminal.

Optionally, the system further includes: a sixth processing module, the sixth processing module is used for:

After determining that the first power factor is not within the preset power factor range, the following steps are performed:

Step S301, sending a first control signal to the reactive power compensation capacitor module; the first control signal is used to trigger the operation of a preset number of capacitors in the reactive power compensation capacitor module; the reactive power compensation capacitor module is connected in parallel to the The power equipment; the reactive power compensation capacitor module includes a number of parallel capacitors;

Step S302, after the reactive power compensation capacitor module runs for a preset time period, obtain a second power factor based on the current current phase and voltage phase;

Step S303, judging whether the second power factor is within the preset power factor interval; if yes, execute step S304; if not, execute step S305;

Step S304, sending the second prompt message to the external terminal;

Step S305, sending a second control signal to the reactive power compensation capacitor module; the second control signal is used to trigger the reactive power compensation capacitor module to increase the number of capacitors connected in parallel to the electric equipment one by one, and repeat steps S302～ S303.

Optionally, the system further includes a seventh processing module, the seventh processing module is configured to: obtain several detections of the electric equipment after determining that the second power factor is within the preset power factor range Obtain a number of detected temperature values based on the temperature of the point; obtain a temperature characteristic value based on the detected temperature values; and judge whether the temperature characteristic value is greater than a preset value; if so, send a third prompt message to the external terminal.

Optionally, the system further includes an eighth processing module, the eighth processing module is configured to: after determining that the temperature characteristic value is greater than a preset value, further include: re-collecting the electrical parameter information of the electric device; Obtain the harmonic component in the voltage based on the voltage information in the electrical parameter information; and determine whether the harmonic component in the voltage is greater than a preset amplitude; if yes, send a third control signal to the rectifier of the electric device The third control signal is used to trigger the rectification device to increase the number of rectification phases or increase the number of rectification pulses.

Description of drawings

Fig. 1 is a method flowchart of one embodiment of an electrical fire monitoring method of the present application;

Fig. 2 is a method flowchart of another embodiment of an electrical fire monitoring method of the present application;

Fig. 3 is a method flowchart of another embodiment of an electrical fire monitoring method of the present application;

Fig. 4 is a method flowchart of another embodiment of an electrical fire monitoring method of the present application;

Fig. 5 is a method flowchart of another embodiment of an electrical fire monitoring method of the present application;

Fig. 6 is a system block diagram of an embodiment of an electrical fire monitoring system of the present application;

In the figure, 601, collection module; 602, first processing module; 603, second processing module; 604, third processing module; 605, fourth processing module; 606, fifth processing module; 607, sixth processing module; 608. The seventh processing module; 609. The eighth processing module.

Implementation

Below in conjunction with accompanying drawing and specific embodiment the application is further described:

The embodiment of the present application discloses an electrical fire monitoring method. Referring to Fig. 1, as an embodiment of an electrical fire monitoring method, an electrical fire monitoring method includes the following steps:

Step S101, acquiring electrical parameter information of electric equipment in real time.

The electrical parameter information includes current information and voltage information; the current information includes a first characteristic current value.

Specifically, the current information can be collected through the current transformer connected to the electric equipment, the voltage information can be collected through the voltage transformer connected to the electric equipment, and the electrical signal in the electric equipment can also be sampled and processed by an oscilloscope device, etc. Obtain the electrical parameter information of the electrical equipment. The first characteristic current value may be an average value of the current value of the electric device within a period of time, or an average value obtained after error processing of the current value within a period of time, and the first characteristic value represents the current magnitude of the electric device current.

Step S102 , judging whether the first characteristic current value is greater than the upper threshold of the preset interval; if yes, the second duration is obtained based on the sum of the time durations in which the first characteristic current value is greater than the upper threshold within the preset first duration.

Specifically, an excessive current value in the power equipment will cause the temperature of the cables of the power equipment to rise, which in turn will lead to softening of the cable insulation and reduce the service life of the cables. When the collected first characteristic current value is greater than the upper threshold value of the preset interval, it indicates that the electric equipment is in an abnormal state of overload, and at this time, the processor counts the sum of the time lengths during which the first characteristic current value is greater than the upper threshold value within the preset first time length, and then When the second duration is obtained, since the power equipment is in a fluctuating state in real time, if the first characteristic current value is greater than the upper threshold of the preset interval, a prompt will be issued immediately, which is prone to false alarms.

Step S103. Obtain an overload ratio based on the second duration and the first duration.

Step S104 , judging whether the overload ratio is greater than a preset ratio, and if so, sending overload information to the external terminal; the overload information is used to trigger the external terminal to generate fire risk warning information.

Specifically, when the overload ratio is greater than the preset ratio, it indicates that the current electrical equipment is overloaded, and the overload of the electrical equipment may easily lead to overheating of the electrical equipment, which in turn may easily cause a fire in the electrical equipment. At this time, the processor sends overload information to the external terminal, which can be a central control device or an external smart phone, etc., to remind corresponding staff. In this application, by collecting the electrical parameter information in the power equipment and processing the collected electrical parameter information, it is judged whether the power equipment is in an abnormal state. When the overload ratio is greater than the preset ratio, the processor sends the overload information at this time To the external terminal, there is a certain fire risk in the external middle end of the electric equipment, which is convenient for the staff to deal with it more quickly and reduces the possibility of fire in the electric equipment.

Referring to Figure 2, as one of the implementations of an electrical fire monitoring method, the voltage information includes the voltage phase, and the current information also includes the current phase; after obtaining the electrical parameter information of the electrical equipment, it also includes:

Step S201. Obtain a first power factor based on the voltage phase and the current phase.

Step S202, judging whether the first power factor is within a preset power factor interval; if not, sending a first prompt message to an external terminal.

Specifically, the cosine of the phase difference (Φ) between voltage and current is called the power factor, represented by the symbol cosΦ. In numerical terms, the power factor is the ratio of active power to apparent power, that is, cosΦ=P/S. Electric loads such as motors, transformers, fluorescent lamps, and electric arc furnaces are mostly inductive loads. These inductive devices not only need to absorb active power from the power system during operation, but also absorb reactive power at the same time. When most of the electrical loads are inductive loads or capacitive loads, a large amount of reactive power will be consumed, and large reactive power will lower the transmission efficiency of the entire power equipment and adversely affect the normal operation of the power equipment. Obtain the first power factor through the voltage phase and current phase, and judge whether the first power factor is in the preset power factor range. When the first power factor is not in the preset power factor range, it indicates that the electric equipment has delivered more useless work. The processor sends the first prompt signal to the external terminal to remind corresponding staff.

Referring to Figure 3, as one of the implementations of the electrical fire monitoring method, after determining that the first power factor is not within the preset power factor range, it further includes:

Step S301, sending the first control signal to the reactive power compensation capacitor module; the first control signal is used to trigger the operation of the preset number of capacitors in the reactive power compensation capacitor module; the reactive power compensation capacitor module is connected in parallel to the transmission line of the power equipment; The power compensation capacitor module includes several capacitors connected in parallel;

Step S302, after the reactive power compensation capacitor module runs for a preset period of time, obtain a second power factor based on the current current phase and voltage phase;

Step S303, judging whether the second power factor is within the preset power factor interval; if yes, execute step S304; if not, execute step S305;

Step S304, sending the second prompt message to the external terminal;

Step S305, sending a second control signal to the reactive power compensation capacitor module; the second control signal is used to trigger the reactive power compensation capacitor module to increase the number of capacitors connected in parallel to the transmission line of the electric equipment one by one, and repeat steps S302-S303.

Specifically, the reactive power compensation capacitor module includes several capacitors connected in parallel, and the reactive power compensation capacitor module is connected in parallel with the electric equipment. After determining that the first power factor is not within the preset power factor range, the processor sends a first control signal to the reactive power compensation capacitor module. When the reactive power compensation capacitor modules are connected in parallel and work on electric equipment, they can provide compensation for reactive power consumed by inductive loads, reducing the reactive power provided by electric equipment to inductive loads. The reactive power compensation capacitors connected in parallel to the power equipment will amplify the harmonics, and the harmonic current will cause local overheating of the transformer. Therefore, in this application, the number of capacitors connected in parallel to the transmission lines of the power equipment and working is increased one by one. Since the flow of reactive power in the electric equipment is reduced, the loss of electric energy is reduced, and the transmission efficiency of electric energy is improved.

Referring to Figure 4, as one of the implementations of an electrical fire monitoring method, if it is determined that the first power factor is not within the preset power factor range, the method further includes:

Step S401, obtaining the temperatures of several detection points of the electric equipment to obtain several detection temperature values;

Step S402, obtaining temperature characteristic values based on several detected temperature values; and,

Step S403, judging whether the temperature characteristic value is greater than a preset value; if yes, sending a third prompt message to the external terminal.

Specifically, the reactive power compensation capacitor connected in parallel to the power equipment will amplify the harmonics, and the harmonic currents will cause local overheating of the transformer. Several detection points are pre-set, and the temperature value of the detection point can be obtained through the temperature sensor set at the detection point. The processor communicates with the temperature sensor. The temperature sensor detects the temperature of the corresponding detection point and sends the temperature data to the processor. The processor obtains the temperature characteristic value based on the acquired temperature data. The temperature characteristic value can be summed and averaged for all temperature data. It can also be obtained by summing and averaging all the temperature data after error processing. When it is determined that the temperature characteristic value is greater than the preset value, the processor sends the third prompt information value to the external terminal to prompt the corresponding staff of.

Referring to Figure 5, as one of the implementations of the electrical fire monitoring method, after determining that the temperature characteristic value is greater than the preset, it also includes:

Step S501, re-collect the electrical parameter information of the electric equipment;

Step S502, obtaining the harmonic component in the voltage based on the voltage information in the electrical parameter information; and,

Step S503, determine whether the harmonic component in the voltage is greater than the preset amplitude; if so, send a third control signal to the rectifier device of the power equipment, and the third control signal is used to trigger the rectifier device to increase the number of rectification phases or increase the rectification phase Pulse count.

Specifically, the processor re-collects the electrical parameter information of the power equipment and obtains the harmonic component in the voltage based on the voltage information in the electrical parameter information. When it is determined that the harmonic component is greater than the preset amplitude, it indicates that the cause of heating is most likely due to caused by harmonics, at this time the processor sends a third control signal to the rectifier device of the power equipment to increase the number of rectification phases or increase the number of pulsations of rectification, thereby effectively suppressing the harmonics with a slightly lower frequency; when the number of rectification phases increases to one times, the harmonic current will drop by about four times, greatly reducing the number of harmonics, which in turn can reduce the temperature of the transformer, which is conducive to maintaining the normal operation of power equipment.

Referring to Figure 6, the present application also provides an electrical fire monitoring system, as one of the implementations of an electrical fire monitoring system, the system includes:

The acquisition module 601 is configured to: acquire electrical parameter information of electric equipment in real time; the electrical parameter information includes current information and voltage information; the current information includes a first characteristic current value;

The first processing module 602 is used to: determine whether the first characteristic current value is greater than the upper threshold of the preset interval; duration;

The second processing module 603 is configured to: obtain the overload ratio based on the ratio of the second duration to the first duration, that is, the second duration÷the first duration=the overload ratio; and,

The third processing module 604 is configured to: judge whether the overload ratio is greater than a preset ratio, and if so, send overload information to the external terminal; the overload information is used to trigger the external terminal to generate fire risk warning information.

As another implementation of the electrical fire monitoring system, the voltage information includes voltage phase, and the current information also includes current phase; the system also includes:

The fourth processing module 605 is configured to: obtain the first power factor based on the voltage phase and the current phase after obtaining the electrical parameter information of the electric equipment; and,

The fifth processing module 606 is configured to: judge whether the first power factor is within a preset power factor interval; if not, send first prompt information to an external terminal.

As another implementation of the electrical fire monitoring system, the system further includes: a sixth processing module 607, and the sixth processing module 607 is used for:

After determining that the first power factor is not within the preset power factor range, the following steps are performed:

Step S301, sending the first control signal to the reactive power compensation capacitor module; the first control signal is used to trigger the operation of the preset number of capacitors of the reactive power compensation capacitor module; the reactive power compensation capacitor module is connected in parallel to the power equipment; the reactive power compensation capacitor The module includes several capacitors connected in parallel;

Step S302, after the reactive power compensation capacitor module runs for a preset period of time, obtain a second power factor based on the current current phase and voltage phase;

Step S303, judging whether the second power factor is within the preset power factor interval; if yes, execute step S304; if not, execute step S305;

Step S304, sending the second prompt message to the external terminal;

Step S305, sending a second control signal to the reactive power compensation capacitor module; the second control signal is used to trigger the reactive power compensation capacitor module to increase the number of capacitors connected in parallel to the electric equipment one by one, and repeat steps S302-S303.

As another implementation of the electrical fire monitoring system, the system further includes a seventh processing module 608, which is used to: after determining that the second power factor is within the preset power factor range, obtain several A number of detection temperature values are obtained from the temperature of each detection point; temperature characteristic values are obtained based on the detection temperature values; and whether the temperature characteristic value is greater than a preset value is judged; if yes, a third prompt message is sent to the external terminal.

As another implementation of the electrical fire monitoring system, the system further includes an eighth processing module 609, and the eighth processing module 609 is configured to: after determining that the temperature characteristic value is greater than a preset value, further include: Electrical parameter information; obtain the harmonic component in the voltage based on the voltage information in the electrical parameter information; and determine whether the harmonic component in the voltage is greater than a preset amplitude; if so, send a third control signal to the rectifier of the electric device components, the third control signal is used to trigger the rectification device to increase the number of rectification phases or increase the number of rectification pulses.

The embodiment of the present application also discloses a computer device.

Specifically, the device includes a memory and a server, and the memory stores a computer program that can be loaded by the server and execute any one of the above electrical fire monitoring methods.

The embodiment of the present application also discloses a computer-readable storage medium.

Specifically, the computer-readable storage medium stores a computer program that can be loaded by the server and executes any one of the above-mentioned electrical fire monitoring methods. The computer-readable storage medium includes, for example: U disk, mobile hard disk, read-only Memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, and other media that can store program codes.

All of the above are preferred embodiments of the application, and are not intended to limit the scope of protection of the application. Any feature disclosed in this specification (including abstracts and drawings), unless specifically stated, can be used by other equivalent or similar Alternative features for the purpose are replaced. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

Claims (10)

1. An electrical fire monitoring method, characterized in that, comprising: Acquiring electrical parameter information of the power equipment in real time; the electrical parameter information includes current information and voltage information; the current information includes a first characteristic current value; Judging whether the first characteristic current value is greater than the upper threshold of the preset interval; if yes, then obtaining a second duration based on the sum of the duration of the first characteristic current value greater than the upper threshold within the preset first duration; obtaining an overload ratio based on a ratio of the second duration to the first duration; and, Judging whether the overload ratio is greater than a preset ratio, if so, sending overload information to the external terminal; the overload information is used to trigger the external terminal to generate fire risk prompt information. 2. A kind of electric fire monitoring method according to claim 1, is characterized in that, described voltage information comprises voltage phase, and described current information also comprises current phase; After obtaining the electrical parameter information of electrical equipment, also comprise: obtaining a first power factor based on the voltage phase and the current phase; Judging whether the first power factor is within a preset power factor interval; if not, sending first prompt information to the external terminal. 3. A method for monitoring electrical fires according to claim 2, wherein if it is determined that the first power factor is not within the preset power factor interval, the method further comprises: Step S301, sending a first control signal to the reactive power compensation capacitor module; the first control signal is used to trigger the operation of a preset number of capacitors in the reactive power compensation capacitor module; the reactive power compensation capacitor module is connected in parallel to the The power transmission line of the electric power equipment; the reactive power compensation capacitor module includes several capacitors connected in parallel; Step S302, after the reactive power compensation capacitor module runs for a preset time period, obtain a second power factor based on the current current phase and voltage phase; Step S303, judging whether the second power factor is within the preset power factor interval; if yes, execute step S304; if not, execute step S305; Step S304, sending the second prompt message to the external terminal; Step S305, sending a second control signal to the reactive power compensation capacitor module; the second control signal is used to trigger the reactive power compensation capacitor module to increase the number of capacitors connected in parallel to the transmission line of the power equipment one by one, repeat Steps S302-S303. 4. A kind of electrical fire monitoring method according to claim 3, it is characterized in that, after determining that the second power factor is located in the preset power factor interval, further comprising: Obtaining the temperatures of several detection points of the electric equipment to obtain several detection temperature values; deriving a temperature characteristic value based on a number of detected temperature values; and, Judging whether the temperature characteristic value is greater than a preset value; if yes, sending a third prompt message to the external terminal. 5. A kind of electrical fire monitoring method according to claim 4, is characterized in that, after determining that described temperature characteristic value is greater than preset value, also comprises: re-collecting the electrical parameter information of the electrical equipment; obtaining a harmonic component in the voltage based on the voltage information in the electrical parameter information; and, judging whether the harmonic component in the voltage is greater than a preset amplitude; if so, sending a third control signal to the rectification device of the electric equipment, the third control signal being used to trigger the rectification device to increase the rectification phase Count or increase the number of rectified pulses. 6. An electrical fire monitoring system, characterized in that the system comprises: The acquisition module is configured to: acquire electrical parameter information of electric equipment in real time; the electrical parameter information includes current information and voltage information; the current information includes a first characteristic current value; The first processing module is used for: judging whether the first characteristic current value is greater than the upper threshold of the preset interval; if yes, within the preset first time duration based on the sum of the time lengths in which the first characteristic current value is greater than the upper threshold get the second duration; A second processing module, configured to: obtain an overload ratio based on the second duration and the first duration; and, The third processing module is used to: judge whether the overload ratio is greater than a preset ratio, and if so, send overload information to the external terminal; the overload information is used to trigger the external terminal to generate fire risk warning information. 7. A kind of electrical fire monitoring system according to claim 1, is characterized in that, described voltage information comprises voltage phase, and described current information also comprises current phase; Described system also comprises: The fourth processing module is configured to: obtain the first power factor based on the voltage phase and the current phase after obtaining the electrical parameter information of the electric equipment; and, A fifth processing module, configured to: judge whether the first power factor is within a preset power factor interval; if not, send first prompt information to the external terminal. 8. A kind of electrical fire monitoring system according to claim 7, is characterized in that, described system also comprises: the sixth processing module, and described sixth processing module is used for: After determining that the first power factor is not within the preset power factor range, the following steps are performed: Step S301, sending a first control signal to the reactive power compensation capacitor module; the first control signal is used to trigger the operation of a preset number of capacitors in the reactive power compensation capacitor module; the reactive power compensation capacitor module is connected in parallel to the The power transmission line of the electric power equipment; the reactive power compensation capacitor module includes several capacitors connected in parallel; Step S302, after the reactive power compensation capacitor module runs for a preset time period, obtain a second power factor based on the current current phase and voltage phase; Step S303, judging whether the second power factor is within the preset power factor interval; if yes, execute step S304; if not, execute step S305; Step S304, sending the second prompt message to the external terminal; Step S305, sending a second control signal to the reactive power compensation capacitor module; the second control signal is used to trigger the reactive power compensation capacitor module to increase the number of capacitors connected in parallel to the transmission line of the power equipment one by one, repeat Steps S302-S303. 9. The electrical fire monitoring system according to claim 8, characterized in that, the system further comprises a seventh processing module, the seventh processing module is used for: when determining that the second power factor is within the After the power factor range is preset, acquire the temperatures of several detection points of the electrical equipment to obtain several detection temperature values; obtain temperature characteristic values based on the detection temperature values; and determine whether the temperature characteristic value is greater than a preset value; if If yes, send the third prompt information to the external terminal. 10. An electrical fire monitoring system according to claim 9, characterized in that, the system further comprises an eighth processing module, the eighth processing module is used to: determine that the temperature characteristic value is greater than a preset value After that, it also includes: re-collecting the electrical parameter information of the electric equipment; obtaining the harmonic component in the voltage based on the voltage information in the electrical parameter information; and judging whether the harmonic component in the voltage is greater than a preset amplitude; If yes, then send a third control signal to the rectification device of the power equipment, where the third control signal is used to trigger the rectification device to increase the number of rectification phases or increase the number of rectification pulses.