System applied to electrical equipment and having extremely-early fire early warning function

Abstract

The invention relates to the technical field of fire alarm, in particular to a system applied to electrical equipment and having an extremely early fire early warning function. The system comprises a pre-disaster signal acquisition module and a response signal transmission mode planning module. According to the invention, pre-disaster information in a narrow electrical space is monitored in real time through the pre-disaster signal acquisition module, timely response processing is carried out in cooperation with distributed and controlled external equipment, different detection signals are transmitted to corresponding targets through the response signal transmission mode planning module in combination with classified detection signals, and the detection signals are transmitted to the corresponding targets according to the state change of the electrical space. According to the method, the corresponding targets are responded, so that multi-target classification processing is realized, pre-disaster signals with rapid development trend can be timely processed through the external equipment, pre-disaster signals with slow development can be responded, manual processing is performed, action execution conditions are acquired in real time, whether secondary starting of the external equipment needs to be performed or not is judged, and the operation efficiency is improved. The flexibility of the whole system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire alarm, and in particular to a system for providing extremely early fire warning for electrical equipment. Background Art

[0002] In recent years, fire accidents in power systems have occurred frequently and have been increasing year by year, causing huge economic losses and serious social impacts to enterprises. Fires in power systems are different from other fires. They are highly destructive and spread quickly. After a fire, power equipment may still be energized. Due to damage to electrical insulation or the grounding of live cables, there are step voltages and contact pressures within a certain range, which can easily cause electric shock accidents. In addition, some electrical equipment is filled with a large amount of oil (such as transformers, voltage transformers, etc.), and because the internal space of these electrical equipment is small, if the pre-disaster signals cannot be monitored in advance, oil spraying and explosions may occur after the fire. Once the power system catches fire, it is extremely difficult to extinguish the fire and may cause large-scale power outages, production stoppages, and chaos in life, endangering social public safety.

[0003] At the same time, during the startup process of electrical equipment, its internal temperature will continue to increase as it runs. For existing monitoring equipment, its monitoring item is the internal temperature of the electrical equipment, and the external equipment is responded to through abnormal temperature alarm. This can easily cause false alarms due to the high temperature generated by the operation of the equipment itself, causing the external equipment to start prematurely. The internal space of the electrical equipment is small, and the external equipment after startup will cause the space to be filled with impurities, making it more difficult to clean up later, and may even directly damage the internal components of the entire electrical equipment.

[0004] In order to address the above problems, there is an urgent need for a system that can provide extremely early fire warning for electrical equipment. Summary of the invention

[0005] The purpose of the present invention is to provide a system for electrical equipment with extremely early fire warning to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, a system for extremely early fire warning applied to electrical equipment is provided, comprising an electrical fire monitoring point control module, a pre-disaster signal acquisition module, an acquisition signal classification processing module, a response signal transmission mode planning module and an alarm signal response module; The electrical fire monitoring point control module is used to obtain the distribution of each electrical device in the electrical area to be tested, and plan the location of the detection equipment and external equipment; The pre-disaster signal acquisition module acquires the detection signal of the detection equipment in real time through the signal transmission channel built by the Internet of Things, and feeds the detection signal back to the acquisition signal classification processing module; The acquisition signal classification processing module classifies and processes the detection signal in combination with the detection signal content; The response signal transmission mode planning module combines the classified detection signals to establish a response signal transmission strategy, and builds different signal transmission routes according to the response signal transmission strategy to transmit the response signal to the corresponding target; The alarm signal response module obtains the action execution status after the target receives the response signal and the detection signal obtained by the detection device in real time, and sends the response signal to the external device for secondary control startup.

[0007] As a further improvement of the present technical solution, the detection device in the electrical fire monitoring point control module is a wireless pyrolytic particle detector, which obtains pre-disaster information changes in the electrical space by monitoring the pyrolytic particles in the electrical space. The external device in the electrical fire monitoring point control module is a small space automatic external device, which includes a signal response device, a fire extinguishing patch, a fire extinguishing tape and a thermistor, wherein the fire extinguishing patch is adhered to the corresponding position point by the fire extinguishing tape, and microcapsule particles containing perfluorohexanone are placed inside the fire extinguishing patch.

[0008] As a further improvement of the technical solution, the method for planning the location points of the detection equipment and the external equipment in the electrical fire monitoring point control module includes the following steps: S1. Obtain the arrangement of components and circuits in the electrical space to be tested; S2. Locate the free area in the electrical space to be tested; S3, obtaining the air flow effect of each free area position point, and taking the free area position point with the best air flow effect as the detection device position point; S4. Obtain the coverage status of each free area location point, and use the free area location point with the widest coverage of components and lines as the external device location point.

[0009] As a further improvement of the technical solution, the detection signal in the acquisition signal classification processing module includes a temperature change signal and a pyrolysis particle concentration change signal; The temperature change signal is the temperature change rate in the electrical space per unit time. , real-time sensing through thermistor wire; The pyrolysis particle concentration change signal is the pyrolysis particle concentration change rate in the electrical space per unit time. , real-time monitoring is performed through a wireless pyrolysis particle detector.

[0010] As a further improvement of the technical solution, the method for establishing a response signal transmission strategy in the response signal transmission mode planning module comprises the following steps: S10. Establish unit monitoring time , get the interval unit monitoring time Temperature change rate within and the change rate of pyrolysis particle concentration ; S20. Collect fire change information in electrical spaces, obtain the temperature change range and pyrolysis particle concentration change range under normal operation and pre-disaster operation conditions, and establish a temperature change rate threshold And the threshold value of pyrolysis particle concentration change ; S30, using a threshold comparison algorithm to determine whether the current temperature variation range and the pyrolysis particle concentration variation range have reached the pre-disaster operating state; S40, obtain the currently monitored abnormal change rate , and predict the pyrolysis particle concentration response value Or temperature response value Reserved manual response time ; S50: Collect the actual emergency time of manual operation and obtain the regular response time , determine the response status of manual operation or automatic startup of external equipment.

[0011] As a further improvement of the present technical solution, the threshold comparison algorithm in S30 is as follows: when ≤ and ≤ , it means that the current electrical space is in normal operation; when ≤ and > When the wireless pyrolysis particle detector is detected, the abnormal change rate is obtained. , and predict the concentration of pyrolytic particles monitored by the current wireless pyrolytic particle detector according to the current abnormal change rate The time it takes to reach the starting concentration of pyrolysis particles is marked as the interval time ; when > and ≤ When the abnormal change rate detected by the current thermistor is obtained , and predict the temperature monitored by the current thermistor according to the current abnormal change rate The time taken to reach the temperature response start, marked as the interval time ; when > and When, compare the interval time With interval time , select the interval with the smallest value as the reserved manual response time .

[0012] As a further improvement of the technical solution, the method for determining the response state of manual operation or automatic startup of an external device in S50 includes the following steps: S51. Obtaining the determined reserved manual response time under different states ; S52, compare the normal response time Reserved human response time with real-time prediction ; when ≤ When the abnormal change rate is Transmitted to the operation and maintenance personnel, and the pyrolysis particle concentration and the temperature in the electrical space are obtained in real time. When the pyrolysis particle concentration threshold or temperature threshold is reached, the external device responds and starts; when When the pyrolysis particle concentration and the temperature in the electrical space are obtained in real time, when the pyrolysis particle concentration threshold or the temperature threshold is reached, the external device responds and starts.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This is applied to systems where electrical equipment has extremely early fire warning. The pre-disaster signal acquisition module monitors pre-disaster information in a small electrical space in real time, cooperates with the deployed external equipment for timely response processing, and transmits different detection signals to corresponding targets through the response signal transmission mode planning module in combination with the classified detection signals. According to the state changes of the electrical space, the corresponding targets are responded to, thereby realizing multi-target classification processing, which ensures that pre-disaster signals with rapid development trends can be processed by external equipment in a timely manner, and at the same time can respond to pre-disaster signals with slow development, process them manually, and obtain the action execution status in real time to determine whether the external equipment needs to be restarted again, thereby improving the flexibility of the overall system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall system structure block diagram of the present invention; Figure 2 This is a simulation diagram of actual monitoring of the present invention.

[0015] The meaning of each number in the figure is: 10. Electrical fire monitoring point control module; 20. Pre-disaster signal acquisition module; 30. Acquisition signal classification processing module; 40. Response signal transmission mode planning module; 50. Alarm signal response module. DETAILED DESCRIPTION

[0016] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1 As shown, a system for early warning of fire in electrical equipment is provided, including an electrical fire monitoring point control module 10, a pre-disaster signal acquisition module 20, an acquisition signal classification processing module 30, a response signal transmission mode planning module 40 and an alarm signal response module 50; Among them, the electrical fire monitoring point control module 10 is used to obtain the distribution of each electrical equipment in the electrical area to be tested, and plan the location points of the detection equipment and external equipment; The pre-disaster signal collection module 20 acquires the detection signal of the detection equipment in real time through the signal transmission channel built by the Internet of Things, and feeds the detection signal back to the collection signal classification processing module 30; The acquisition signal classification processing module 30 classifies and processes the detection signal in combination with the detection signal content; The response signal transmission mode planning module 40 combines the classified detection signals to establish a response signal transmission strategy, and builds different signal transmission routes according to the response signal transmission strategy to transmit the response signal to the corresponding target; The alarm signal response module 50 obtains the action execution status after the target receives the response signal and the detection signal obtained by the detection device in real time, and sends the response signal to the external device for secondary control startup.

[0018] When used specifically, during the early monitoring of fires in narrow electrical spaces, firstly, due to the complex distribution of circuits and components in the electrical space, in order to ensure accurate monitoring and later fire extinguishing efficiency, it is necessary to obtain the distribution of each electrical device in the electrical area to be tested through the electrical fire monitoring point control module 10, plan the location points of the detection equipment and external devices, and ensure that the detection equipment can fully monitor the electrical space; During the actual monitoring process, the pre-disaster signal acquisition module 20 obtains the detection signal of the detection device in real time through the signal transmission channel built by the Internet of Things, and feeds the detection signal back to the acquisition signal classification processing module 30. At this time, the acquisition signal classification processing module 30 classifies the detection signal in combination with the detection signal content. This step is to distinguish between temperature anomalies caused by fire and temperature rise during the operation of the electrical components themselves. At the same time, the pre-disaster change state is classified and processed. By distinguishing the pre-disaster state change frequency, and cooperating with the response signal transmission mode planning module 40 to combine the classified detection signal, a response signal transmission strategy is established, and different signal transmission routes are built according to the response signal transmission strategy to transmit the response signal to the corresponding target. For the case where the fire development trend is slow, it is processed manually. For the fire development trend is rapid, it is automatically responded through the external device. Finally, when the manual processing fails to be timely, it is necessary to obtain the action execution status after the target receives the response signal and the detection signal obtained by the detection device in real time through the alarm signal response module 50, and send the response signal to the external device for secondary control startup, that is, the operation and maintenance personnel fail to respond and process in time, resulting in the pyrolysis particle concentration threshold or temperature threshold in the electrical space. At this time, the control external device is started.

[0019] In addition, the detection equipment in the electrical fire monitoring point control module 10 is a wireless pyrolytic particle detector, which obtains pre-disaster information changes in the electrical space by monitoring the pyrolytic particles in the electrical space. The external equipment in the electrical fire monitoring point control module 10 is a small space automatic external equipment, wherein the small space automatic external equipment includes a signal response device, a fire extinguishing patch, a fire extinguishing tape and a thermistor, wherein the fire extinguishing patch is attached to the corresponding position point by the fire extinguishing tape, and microcapsule particles containing perfluorohexanone are placed inside the fire extinguishing patch. The signal response device responds to pre-disaster information changes in the electrical space, and at the same time, the configured thermistor senses the temperature changes in the electrical space in real time, and responds to the temperature change state in the electrical space through the set temperature threshold. When the temperature in the electrical space exceeds the temperature threshold, the signal response device automatically responds to control.

[0020] Furthermore, the method for planning the location points of the detection equipment and the external equipment in the electrical fire monitoring point control module 10 includes the following steps: S1. Obtain the arrangement of components and circuits in the electrical space to be tested; S2. Locate the free area in the electrical space to be tested; S3, obtaining the air flow effect of each free area position point, and taking the free area position point with the best air flow effect as the detection device position point; S4. Obtain the coverage status of each free area location point, and use the free area location point with the widest coverage of components and lines as the external device location point.

[0021] In specific use, during the pre-disaster monitoring process, due to the small space on the inner wall of the electrical equipment and the dense distribution of electrical components and connecting lines, the detection equipment needs to respond in time to ensure that it can be processed before the fire occurs. The wireless pyrolytic particle detector adopted by the present invention responds by capturing the concentration of pyrolytic particles in the electrical space. Therefore, during the capture process, it is necessary to avoid the obstruction of electrical components and connecting lines as much as possible to ensure air flow. When deploying the control, it is first necessary to obtain the arrangement of each component and line in the electrical space to be tested, locate the position points of the spare area in the electrical space to be tested, avoid contact with the components and lines, and affect their normal use. These spare area position points are in different states, and the corresponding air flow speeds are also different. Air flow is the key to ensure the reception of pyrolytic particle flow. Therefore, the next step is to obtain the air flow effect of each spare area position point, and through the air flow effect of different spare area position points of the gas capture device, the spare area position point with the best air flow effect is used as the detection device position point.

[0022] Furthermore, the detection signals in the acquisition signal classification processing module 30 include temperature change signals and pyrolysis particle concentration change signals; Among them, the temperature change signal is the temperature change rate in the electrical space per unit time , real-time sensing through thermistor wire; The pyrolysis particle concentration change signal is the pyrolysis particle concentration change rate in the electrical space per unit time. , real-time monitoring is performed through a wireless pyrolysis particle detector.

[0023] The method for establishing a response signal transmission strategy in the response signal transmission mode planning module 40 includes the following steps: S10. Establish unit monitoring time , get the interval unit monitoring time Temperature change rate within and the change rate of pyrolysis particle concentration ; S20. Collect fire change information in electrical spaces, obtain the temperature change range and pyrolysis particle concentration change range under normal operation and pre-disaster operation conditions, and establish a temperature change rate threshold And the threshold value of pyrolysis particle concentration change ; S30, using a threshold comparison algorithm to determine whether the current temperature variation range and the pyrolysis particle concentration variation range have reached the pre-disaster operating state; S40, obtain the currently monitored abnormal change rate , and predict the pyrolysis particle concentration response value Or temperature response value Reserved manual response time ; S50: Collect the actual emergency time of manual operation and obtain the regular response time , determine the response status of manual operation or automatic startup of external equipment.

[0024] The threshold comparison algorithm in S30 is as follows: when ≤ and ≤ , it means that the current electrical space is in normal operation; when ≤ and > When the wireless pyrolysis particle detector is detected, the abnormal change rate is obtained. , and predict the concentration of pyrolytic particles monitored by the current wireless pyrolytic particle detector according to the current abnormal change rate The time it takes to reach the starting concentration of pyrolysis particles is marked as the interval time ; when > and ≤ When the abnormal change rate detected by the current thermistor is obtained , and predict the temperature monitored by the current thermistor according to the current abnormal change rate The time taken to reach the temperature response start, marked as the interval time ; when > and When, compare the interval time With interval time , select the interval with the smallest value as the reserved manual response time

[0025] The method for determining the response state of manual operation or automatic startup of an external device in S50 includes the following steps: S51. Obtaining the determined reserved manual response time under different states ; S52, compare the normal response time Reserved human response time with real-time prediction ; when ≤ When the abnormal change rate is Transmitted to the operation and maintenance personnel, and the pyrolysis particle concentration and the temperature in the electrical space are obtained in real time. When the pyrolysis particle concentration threshold or temperature threshold is reached, the external device responds and starts; when When the pyrolysis particle concentration and the temperature in the electrical space are obtained in real time, when the pyrolysis particle concentration threshold or the temperature threshold is reached, the external device responds and starts.

[0026] In specific use, during the process of monitoring signal transmission, in some cases, timely manual processing can effectively control the further spread of the disaster, avoid triggering external devices and reduce losses. Therefore, in actual monitoring, such as Figure 2 As shown, first you need to set the unit monitoring time , get the interval unit monitoring time Temperature change rate within and the change rate of pyrolysis particle concentration ; However, in the actual operation process, there are differences in the temperature change and the change in the concentration of pyrolysis particles between the pre-disaster state and the normal operation state. and the change rate of pyrolysis particle concentration It is much higher than the normal operating state, so it is necessary to collect fire change information in the electrical space, obtain the temperature change range and pyrolysis particle concentration change range under the normal operating state and the pre-disaster operating state, and formulate a temperature change rate threshold And the threshold value of pyrolysis particle concentration change , and perform real-time comparison: when ≤ and ≤ , it means that the current electrical space is in normal operation and no processing is required; when ≤ and > When , it indicates that the temperature change in the electrical space is abnormal at this time, and the abnormal change rate monitored by the current wireless pyrolysis particle detector is obtained. , and predict the concentration of pyrolytic particles monitored by the current wireless pyrolytic particle detector according to the current abnormal change rate The time it takes to reach the starting concentration of pyrolysis particles is marked as the interval time ; when > and ≤ When , it indicates that the temperature and pyrolysis particle concentration in the electrical space are abnormal, and the abnormal change rate monitored by the current thermistor line is obtained. , and predict the temperature monitored by the current thermistor according to the current abnormal change rate The time taken to reach the temperature response start, marked as the interval time ; when > and When, compare the interval time With interval time Since the time consumed is the key to determine whether the operation and maintenance personnel can respond before the disaster, the shortest interval time is used as the comparison basis, so the interval time with the smallest value is selected as the reserved manual response time. ; Predict and reserve manual response time After that, it is necessary to collect the actual manual operation time to handle the emergency and obtain the regular response time. , it is necessary to determine the response status of manual operation or automatic startup of external equipment; when ≤ When the abnormal change rate is Transmitted to the operation and maintenance personnel, and the pyrolysis particle concentration and the temperature in the electrical space are obtained in real time. When the pyrolysis particle concentration threshold or temperature threshold is reached, the external device responds and starts, indicating the predicted reserved manual response time at this time It is sufficient for operation and maintenance personnel to react and handle, and control will be performed before the pyrolysis particle concentration threshold or temperature threshold is reached in the electrical space, thereby preventing external equipment from starting; when When the pyrolysis particle concentration and the temperature in the electrical space are obtained in real time, when the pyrolysis particle concentration threshold or temperature threshold is reached, the external device responds and starts. It takes a certain amount of time to transmit the information to the operation and maintenance personnel, so when the predicted reserved manual response time is determined If the situation is not sufficient for the operation and maintenance personnel to respond and handle the situation, there is no need to transmit the signal, so as to avoid missing the best time to start the external control equipment, which will affect the subsequent fire extinguishing effect.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only preferred examples of the present invention, and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A system for early warning of fire in electrical equipment, characterized in that: It comprises an electrical fire monitoring point control module (10), a pre-disaster signal collection module (20), a collection signal classification processing module (30), a response signal transmission mode planning module (40) and an alarm signal response module (50); The electrical fire monitoring point control module (10) is used to obtain the distribution of each electrical device in the electrical area to be tested, and plan the location of the detection equipment and the external equipment; The pre-disaster signal collection module (20) acquires the detection signal of the detection equipment in real time through the signal transmission channel established by the Internet of Things, and feeds the detection signal back to the collected signal classification processing module (30); The acquisition signal classification processing module (30) classifies the detection signal in combination with the detection signal content; The response signal transmission mode planning module (40) combines the classified detection signals to establish a response signal transmission strategy, and builds different signal transmission routes according to the response signal transmission strategy to transmit the response signal to the corresponding target; The alarm signal response module (50) obtains the action execution status after the target receives the response signal and the detection signal obtained in real time by the detection device, and sends the response signal to the external device for secondary control startup.

2. The system for early warning of fire in electrical equipment according to claim 1, characterized in that: The detection device in the electrical fire monitoring point control module (10) is a wireless pyrolytic particle detector, which obtains pre-disaster information changes in the electrical space by monitoring pyrolytic particles in the electrical space. The external device in the electrical fire monitoring point control module (10) is a small space automatic external device, which includes a signal response device, a fire extinguishing patch, a fire extinguishing tape, and a thermal line, wherein the fire extinguishing patch is attached to a corresponding position point by means of the fire extinguishing tape, and microcapsule particles containing perfluorohexanone are placed inside the fire extinguishing patch.

3. The system for early warning of fire in electrical equipment according to claim 2, characterized in that: The method for planning the location points of detection equipment and external equipment in the electrical fire monitoring point control module (10) comprises the following steps: S1. Obtain the arrangement of components and circuits in the electrical space to be tested; S2. Locate the free area in the electrical space to be tested; S3, obtaining the air flow effect of each free area position point, and taking the free area position point with the best air flow effect as the detection device position point; S4. Obtain the coverage status of each free area location point, and use the free area location point with the widest coverage of components and lines as the external device location point.

4. The system for early warning of fire in electrical equipment according to claim 1, characterized in that: The detection signals in the acquisition signal classification processing module (30) include temperature change signals and pyrolysis particle concentration change signals; The temperature change signal is the temperature change rate in the electrical space per unit time. , real-time sensing through thermistor wire; The pyrolysis particle concentration change signal is the pyrolysis particle concentration change rate in the electrical space per unit time. , real-time monitoring is performed through a wireless pyrolysis particle detector.

5. The system for early warning of fire in electrical equipment according to claim 4 is characterized in that: The method for establishing a response signal transmission strategy in the response signal transmission mode planning module (40) comprises the following steps: S10. Establish unit monitoring time , get the interval unit monitoring time Temperature change rate within and the change rate of pyrolysis particle concentration ; S20. Collect fire change information in electrical spaces, obtain the temperature change range and pyrolysis particle concentration change range under normal operation and pre-disaster operation conditions, and establish a temperature change rate threshold And the threshold value of pyrolysis particle concentration change ; S30, using a threshold comparison algorithm to determine whether the current temperature variation range and the pyrolysis particle concentration variation range have reached the pre-disaster operating state; S40, obtain the currently monitored abnormal change rate , and predict the pyrolysis particle concentration response value Or temperature response value Reserved manual response time ; S50: Collect the actual emergency time of manual operation and obtain the regular response time , determine the response status of manual operation or automatic startup of external equipment.

6. The system for early warning of fire in electrical equipment according to claim 5, characterized in that: The threshold comparison algorithm in S30 is as follows: when ≤ and ≤ , it means that the current electrical space is in normal operation; when ≤ and > When the wireless pyrolysis particle detector is detected, the abnormal change rate is obtained. , and predict the concentration of pyrolytic particles monitored by the current wireless pyrolytic particle detector according to the current abnormal change rate The time it takes to reach the starting concentration of pyrolysis particles is marked as the interval time ; when > and ≤ When the abnormal change rate detected by the current thermistor is obtained , and predict the temperature monitored by the current thermistor according to the current abnormal change rate The time taken to reach the temperature response start, marked as the interval time ; when > and When, compare the interval time With interval time , select the interval with the smallest value as the reserved manual response time .

7. The system for early warning of fire in electrical equipment according to claim 5, characterized in that: The method for determining the response state of manual operation or automatic startup of an external device in S50 comprises the following steps: S51. Obtaining the determined reserved manual response time under different states ; S52, compare the normal response time Reserved human response time with real-time prediction ; when ≤ When the abnormal change rate is Transmitted to the operation and maintenance personnel, and the pyrolysis particle concentration and the temperature in the electrical space are obtained in real time. When the pyrolysis particle concentration threshold or temperature threshold is reached, the external device responds and starts; when When the pyrolysis particle concentration and the temperature in the electrical space are obtained in real time, when the pyrolysis particle concentration threshold or the temperature threshold is reached, the external device responds and starts.

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