CN112991658B - Fire early warning method and uninterrupted power supply - Google Patents
Fire early warning method and uninterrupted power supply Download PDFInfo
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
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- G—PHYSICS
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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- G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
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- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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Abstract
The invention provides a fire early warning method and an uninterruptible power supply, wherein the method comprises the following steps executed according to a preset period: under the current working condition of the uninterruptible power supply, adjusting the working state of the uninterruptible power supply according to a preset mode; generating a first accumulation factor according to the actual temperature parameter in the cabinet and a prestored reference temperature parameter under the same working condition before and after the adjustment of the working state of the uninterruptible power supply; and generating a fire early warning index according to the first accumulation factor, and outputting an alarm signal when the fire early warning index reaches a preset value. According to the invention, the working state of the uninterruptible power supply is actively adjusted, the first accumulation factor is generated according to the comparison between the actual temperature change parameters before and after adjustment and the prestored reference temperature change parameters, and the fire early warning index is generated according to the first accumulation factor to carry out fire early warning, so that the accuracy and timeliness of fire prediction can be greatly improved.
Description
Technical Field
The invention relates to the field of uninterruptible power supplies, in particular to a fire early warning method and an uninterruptible power supply.
Background
An Uninterruptible Power Supply (UPS) is a backup protection power supply for power supply and distribution equipment which is widely used at present. The uninterrupted power supply rectifies the commercial power and then charges the commercial power to the storage battery, and when the commercial power is abnormal, the commercial power is switched to the storage battery for power supply, and is inverted to the load for use. When the mains supply is input normally, the uninterrupted power supply is used as an alternating current mains supply voltage stabilizer to stabilize the mains supply and then supply the regulated mains supply to a load for use, and meanwhile, the uninterrupted power supply charges a built-in battery.
In the existing uninterrupted power supply, the application of a high-frequency module machine is more and more extensive, the power density of the high-frequency module machine is high, the layout of devices is compact, after a semiconductor device is abnormally damaged, secondary faults can be caused by electric arc discharge and conductive debris splashed around, and fire disasters can be caused in serious cases.
In order to avoid fire hazard of an uninterruptible power supply, the current main method is to perform temperature protection on main heating high-power components (such as an IGBT power tube, an SCR power tube, a MOSFET power tube, an inductor, a transformer and the like for power electronic power conversion) in the uninterruptible power supply according to temperature detection or temperature control signals in the uninterruptible power supply, and when the temperature exceeds a protection point of the power components, the operation of the uninterruptible power supply is stopped immediately to avoid further failure due to overhigh temperature.
Due to the complexity of the uninterruptible power supply, the overtemperature signal obtained only by a temperature detection mode can be very delayed, a fire is very likely to be out of control at the moment, and according to statistics, in the fire accidents caused by the uninterruptible power supply in the market at present, a great part of the overtemperature signals are passively stopped to work instead of being stopped to work due to overtemperature signal protection after the internal electrical fault of the uninterruptible power supply is caused by fire
Disclosure of Invention
The invention aims to solve the technical problem that a fire disaster caused by uninterrupted power supply protection cannot be effectively avoided due to over-temperature signal lag, and provides a fire disaster early warning method and an uninterrupted power supply.
The technical scheme for solving the technical problems is to provide a fire early warning method, which is applied to an uninterruptible power supply, wherein the uninterruptible power supply comprises a cabinet and an electronic element, the cabinet comprises an air inlet, an air outlet and a working area positioned between the air inlet and the air outlet, the electronic element is arranged in the working area, and the method comprises the following steps executed according to a preset period:
under the current working condition of the uninterruptible power supply, adjusting the working state of the uninterruptible power supply in a preset mode;
generating a first accumulation factor according to the actual temperature parameter in the cabinet and a prestored reference temperature parameter under the same working condition before and after the adjustment of the working state of the uninterruptible power supply;
and generating a fire early warning index according to the first accumulation factor, and outputting an alarm signal when the fire early warning index reaches a preset value.
As a further improvement of the present invention, the uninterruptible power supply includes a heat dissipation fan located in the cabinet, and the operating conditions include a load factor, an ambient temperature, and a rotation speed of the heat dissipation fan;
adjusting the working state of the uninterruptible power supply according to a preset mode comprises the following steps: adjusting the rotating speed of the cooling fan according to a preset mode;
the reference temperature parameter comprises a reference temperature rate of change, the actual temperature parameter comprises an actual temperature rate of change, and the first accumulation factor decreases as a ratio of the actual temperature rate of change to the reference temperature rate of change increases; alternatively, the first and second liquid crystal display panels may be,
the reference temperature parameter includes a reference temperature variation value, the actual temperature parameter includes an actual temperature variation value, and the first accumulation factor increases as a ratio of the actual temperature variation value to the reference temperature variation value increases.
As a further improvement of the present invention, the electronic component includes a magnetic component, a semiconductor component, and a filter capacitor, the working area includes a magnetic component area, a semiconductor component area, and a filter capacitor area, and the magnetic component is mounted in the magnetic component area, the semiconductor component is mounted in the semiconductor component area, and the filter capacitor is mounted in the filter capacitor area;
the pre-stored reference temperature parameters comprise reference temperature parameters of the magnetic element area, reference temperature parameters of the semiconductor element area and reference temperature parameters of the filter capacitor area;
according to before the operating condition adjustment of uninterrupted power source, the actual temperature parameter in the rack and the reference temperature parameter of prestoring under the same operating mode generate first accumulation factor, include:
generating a first temperature variation component by the actual temperature parameter in the magnetic element area and a prestored reference temperature parameter of the magnetic element area under the same working condition before and after the adjustment of the working state of the uninterruptible power supply;
generating a second temperature variation component by the actual temperature parameter in the semiconductor element area and a prestored reference temperature parameter of the semiconductor element area under the same working condition before and after the adjustment of the working state of the uninterruptible power supply;
generating a third temperature-variable component by the actual temperature parameter in the filter capacitor area and a prestored reference temperature parameter of the filter capacitor area under the same working condition before and after the adjustment of the working state of the uninterruptible power supply;
and generating the first accumulation factor according to the weighted sum of the first temperature-variable component, the second temperature-variable component and the third temperature-variable component.
As a further improvement of the present invention, the magnetic element region is provided with a first temperature control unit, the semiconductor element region is provided with a second temperature control unit, and the filter capacitor region is provided with a third temperature control unit; the method further comprises the following steps:
generating a first temperature control component when the first temperature control unit generates an effective temperature control signal;
generating a second temperature control component when the second temperature control unit generates an effective temperature control signal;
generating a third temperature control component when the third temperature control unit generates an effective temperature control signal;
generating a second accumulation factor according to the weighted sum of the first temperature control component, the second temperature control component and the third temperature control component;
generating a fire warning index according to the first accumulation factor includes: and generating the fire early warning index according to the weighted sum of the first accumulation factor and the second accumulation factor.
As a further improvement of the present invention, the method further comprises:
generating a first temperature difference component according to the temperature difference between the magnetic element area and the air inlet;
generating a second temperature difference component according to the temperature difference between the semiconductor element area and the air inlet;
generating a third temperature difference component according to the temperature difference between the filter element area and the air inlet;
generating a third accumulation factor according to the first temperature difference component, the second temperature difference component and the third temperature difference component;
generating a fire warning index according to the first accumulation factor includes: and generating the fire early warning index according to the weighted sum of the first accumulation factor and the third accumulation factor.
As a further improvement of the present invention, the method further comprises;
generating a fourth accumulation factor according to the temperature difference between the air outlet and the air inlet;
generating a fire warning index according to the first accumulation factor includes: and generating the fire early warning index according to the weighted sum of the first accumulation factor and the fourth accumulation factor.
As a further improvement of the invention, the electronic component comprises a transformer, and the method further comprises:
detecting actual primary side electrical parameters and actual secondary side electrical parameters of the transformer, and generating an actual transformer transformation ratio according to the actual primary side electrical parameters and the actual secondary side electrical parameters, wherein the actual primary side electrical parameters comprise actual primary side voltage and/or current of the transformer, and the actual secondary side electrical parameters comprise actual secondary side voltage and/or current of the transformer;
generating a fifth accumulation factor according to the actual transformer transformation ratio and a designed transformer transformation ratio, wherein the fifth accumulation factor increases with the increase of the difference between the actual transformer transformation ratio and the designed transformer transformation ratio;
generating a fire warning index according to the first accumulation factor includes: and generating the fire early warning index according to the weighted sum of the first accumulation factor and the fifth accumulation factor.
As a further improvement of the present invention, the method further comprises:
detecting humidity data of a humidity sensor in the working area;
generating a sixth accumulation factor from the humidity data, the sixth accumulation factor increasing as the humidity data decreases;
the generating of the fire early warning index according to the first accumulation factor comprises: and generating the fire early warning index according to the weighted sum of the first accumulation factor and the sixth accumulation factor.
As a further improvement of the present invention, the method comprises:
detecting a state of a smoke sensor within the work area;
and when the smoke sensor is triggered to be effective, enabling the fire early warning index to reach a maximum value.
The embodiment of the invention also provides an uninterruptible power supply, which comprises a memory and a processor, wherein the memory stores a computer program executable in the processor, and the processor implements the fire early warning method when executing the computer program.
The implementation of the fire early warning method and the uninterrupted power supply has the following beneficial effects: through the active adjustment uninterrupted power source's operating condition to actual temperature change parameter before and after will adjusting and the reference temperature change parameter contrast that prestores generate first accumulation factor, and generate the conflagration early warning index according to first accumulation factor and carry out the conflagration early warning, can improve the precision and the promptness of conflagration prediction greatly.
Drawings
Fig. 1 is a schematic flow chart of a fire early warning method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a process of generating a first accumulation factor in a fire warning method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a process of generating a second accumulation factor in a fire warning method according to another embodiment of the present invention;
fig. 4 is a flowchart illustrating a process of generating a third accumulation factor in a fire alarm according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Fig. 1 is a schematic flow chart of a fire early warning method according to an embodiment of the present invention, and the method is applied to an uninterruptible power supply, and improves the accuracy of fire early warning by adopting an active control mode according to an operating state of the uninterruptible power supply. The uninterruptible power supply comprises a cabinet and electronic elements, wherein the cabinet comprises an air inlet, an air outlet and a working area positioned between the air inlet and the air outlet, the electronic elements are arranged in the working area, and the uninterruptible power supply realizes the rectifier processing from input alternating current to direct current and the inverter processing from the direct current to the alternating current through the electronic elements. Specifically, the method of the embodiment includes the following steps executed according to a preset period (the period can be set in advance according to the application occasion, the fire-protection level requirement and the like of the uninterruptible power supply):
step S11: and under the current working condition of the uninterrupted power supply, adjusting the working state of the uninterrupted power supply according to a preset mode.
The current working condition of the uninterruptible power supply is the working condition at each detection moment, and the working condition of the uninterruptible power supply specifically comprises ambient temperature, load rate, rotating speed of a cooling fan and the like.
The working state may specifically include the rotation speed of the cooling fan or other states. For example, when the ups includes a cooling fan, adjusting the operating state of the ups in a preset manner may specifically be: the current rotating speed of the cooling fan is increased or reduced by a certain percentage, the specific proportion of adjustment can be set in advance according to the application place, the grade requirement and the like of the uninterrupted power supply, and the normal work of the uninterrupted power supply is not influenced.
Step S12: and before and after the adjustment of the working state of the uninterruptible power supply, generating a first accumulation factor by the actual temperature parameter in the cabinet of the uninterruptible power supply and the prestored reference temperature parameter under the same working condition. The temperature can be obtained through a temperature sensor in the cabinet, and the actual temperature parameter can be obtained through calculation according to the temperature obtained through the temperature sensor.
The reference temperature parameter can be obtained by experiment and theoretical calculation before the uninterruptible power supply leaves a factory, and is stored in a data storage chip of the uninterruptible power supply.
Specifically, the reference temperature parameter includes a reference temperature change rate and a reference temperature change value (both of which are obtained by experimental and theoretical calculation before the uninterruptible power supply leaves a factory); the actual temperature parameter includes an actual temperature change rate and an actual temperature change value, for example, the actual temperature change rate may be: the value obtained by dividing the temperature difference in the cabinet before and after the adjustment of the working state by the time is as follows: the temperature difference between the front cabinet and the rear cabinet is adjusted under the working state. The first accumulation factor is reduced along with the increase of the ratio of the actual temperature change rate to the reference temperature change rate, namely the smaller the ratio of the actual temperature change rate to the reference temperature change rate is, the larger the first accumulation factor is; and the first accumulation factor increases with the increase of the ratio of the actual temperature change value to the reference temperature change value, i.e. the larger the ratio of the actual temperature change value to the reference temperature change value, the larger the first accumulation factor. In practical applications, the first accumulation factor may be determined according to any one of or both of a ratio of the actual temperature change rate to the reference temperature change rate and a ratio of the actual temperature change value to the reference temperature change value.
Step S13: and generating a fire early warning index according to the first accumulation factor, and outputting an alarm signal when the fire early warning index reaches a preset value. Specifically, the fire alarm index may be formed by only the first accumulation factor, or may be obtained by calculating the first accumulation factor and other influencing factors.
The fire early warning index indicates the index of possible fire occurrence of the uninterruptible power supply in operation, and the higher the fire early warning index value is, the higher the corresponding fire occurrence possibility is. In addition, in the step S13, different fire early warning levels can be divided according to the value of the fire early warning index, and corresponding protection is triggered according to the levels, so that fire-fighting linkage is achieved. For example, the fire level may be classified into 4 levels, low risk levels (corresponding to fire early warning index values 0-30), medium risk levels (corresponding to fire early warning index values (30-60), early warning levels (corresponding to fire early warning index values 60-80), and protection levels (corresponding to fire early warning index values 80-100) according to the fire early warning index, which generate the following corresponding actions:
low risk grade: the uninterrupted power supply has no action, namely the uninterrupted power supply operates normally, and has no alarm and no buzzing;
intermediate risk level: the uninterrupted power supply does not act, but the display interface prompts that general alarm exists and intermittent buzzing early warning is performed;
early warning stage: the uninterrupted power supply does not act, but the display interface thereof prompts that serious alarm exists and continuous buzzing early warning;
protection level: the uninterrupted power source closes output and inside all power modules, and its display interface suggestion has serious warning to continuously buzzing the early warning, through exporting the dry contact, start outside fire control linkage simultaneously, like fire sprinkler, automatic fire extinguishing device, autoalarm etc..
According to the fire early warning method, the working state of the uninterrupted power supply is actively adjusted, the actual temperature change parameters before and after adjustment are compared with the prestored reference temperature change parameters to generate the first accumulation factor, and the fire early warning index is generated according to the first accumulation factor to carry out fire early warning, so that the accuracy and timeliness of fire prediction can be greatly improved. And, present conflagration risk level of uninterrupted power source is represented through using the conflagration early warning index for can take measures in advance according to this conflagration early warning index, prevent the emergence and the fire control linkage of conflagration, accomplish early warning in advance and take measures of answering automatically, avoid taking place conflagration or conflagration further expansion.
Referring to fig. 2, in an embodiment of the present invention, the electronic components of the uninterruptible power supply include a magnetic component (e.g., a transformer), a semiconductor component (e.g., a rectifier and an inverter), and a filter capacitor (e.g., a bus capacitor), and accordingly, the working area in the cabinet includes a magnetic component area, a semiconductor component area, and a filter capacitor area, where the magnetic component area, the semiconductor component area, and the filter capacitor area are respectively provided with a temperature sensor, and the magnetic component is installed in the magnetic component area, the semiconductor component is installed in the semiconductor component area, and the filter capacitor is installed in the filter capacitor area. Correspondingly, the pre-stored reference temperature parameters comprise reference temperature parameters of the magnetic element area, reference temperature parameters of the semiconductor element area and reference temperature parameters of the filter capacitor area.
At this time, step S12 in fig. 1, namely before and after the adjustment of the working state of the uninterruptible power supply (taking the adjustment of the rotation speed of the cooling fan as an example below), the generating of the first accumulation factor by the actual temperature parameter in the cabinet and the prestored reference temperature parameter under the same working condition may specifically include:
step S121: and generating a first temperature variation component by the actual temperature parameter in the magnetic element area and a prestored reference temperature parameter of the magnetic element area under the same working condition according to the rotation speed of the cooling fan before and after adjustment.
Step S122: and generating a second temperature variation component according to the actual temperature parameter in the semiconductor element area and a prestored reference temperature parameter of the semiconductor element area under the same working condition before and after the adjustment of the rotating speed of the cooling fan.
Step S123: and generating a third temperature-variable component by the actual temperature parameter in the filter capacitor area and a prestored reference temperature parameter of the filter capacitor area under the same working condition before and after the adjustment of the rotating speed of the cooling fan.
Step S124: and generating a first accumulation factor according to the weighted sum of the first temperature-varying component, the second temperature-varying component and the third temperature-varying component. The weights of the first temperature-varying component, the second temperature-varying component, and the third temperature-varying component may be set in advance according to an experimental result.
The first temperature variation component, the second temperature variation component and the third temperature variation component are obtained through detecting the temperature variation of different areas in the cabinet before and after the adjustment of the working state of the uninterruptible power supply, and the first accumulation factor is obtained through calculation according to the first temperature variation component, the second temperature variation component and the third temperature variation component, so that whether the heat dissipation conditions of different areas are good or not can be effectively judged, whether each component of the uninterruptible power supply works normally or not can be effectively judged, and the accuracy of fire early warning is further improved.
In another embodiment of the present invention, as shown in fig. 3, the magnetic element area of the ups is provided with a first temperature control unit, the semiconductor element area is provided with a second temperature control unit, and the filter capacitor area is provided with a third temperature control unit, wherein the first temperature control unit, the second temperature control unit, and the third temperature control unit respectively generate an effective signal when the temperature of the respective area exceeds the respective preset value, for example, the output signal is a low level (corresponding to the digital signal "0") when the temperature of the area does not exceed the preset value, and the output signal is a high level (corresponding to the digital signal "1") when the temperature of the area exceeds the preset value. Correspondingly, the fire early warning method comprises the steps of S11 to S13;
step S141: the first temperature control component is generated when the first temperature control unit generates an active temperature control signal (i.e., high level). The first temperature control component may be a fixed value, and the value may be set in advance.
Step S142: the second temperature control component is generated when the second temperature control unit generates an active temperature control signal (i.e., high level). The second temperature control component may be a fixed value, and the value may be set in advance.
Step S143: the third temperature control component is generated when the third temperature control unit generates an active temperature control signal (i.e., high level). Wherein the third temperature control component may be a constant value, and the value may be set in advance.
Step S144: and generating a second accumulation factor according to the weighted sum of the first temperature control component, the second temperature control component and the third temperature control component. The weights of the first temperature control component, the second temperature control component and the third temperature control component can be set in advance according to an experimental result.
At this time, step S13 in fig. 1, namely, generating the fire alarm index according to the first accumulation factor, may specifically include: and generating a fire early warning index according to the weighted sum of the first accumulation factor and the second accumulation factor. The weights of the first accumulation factor and the second accumulation factor may be set in advance according to the experimental result.
Referring to fig. 4, in another embodiment of the present invention, the fire early warning method includes steps S11 to S13, in addition to the above steps;
step S151: and generating a first temperature difference component according to the temperature difference between the magnetic element area and the air inlet. The temperatures of the magnetic element area and the air inlet can be respectively obtained through detection of the temperature sensors, and the larger the temperature difference between the magnetic element area and the air inlet is, the larger the first temperature difference component is.
Step S152: and generating a second temperature difference component according to the temperature difference between the semiconductor element area and the air inlet. The temperatures of the semiconductor element area and the air inlet can be respectively obtained through detection of the temperature sensors, and the larger the temperature difference between the semiconductor element area and the air inlet is, the larger the second temperature difference component is.
Step S153: and generating a third temperature difference component according to the temperature difference between the filter element area and the air inlet. The temperatures of the filter element area and the air inlet can be respectively obtained through detection of the temperature sensors, and the larger the temperature difference between the filter element area and the air inlet is, the larger the third temperature difference component is.
Step S154: a third accumulation factor is generated based on the first temperature difference component, the second temperature difference component, and the third temperature difference component. The weights of the first temperature difference component, the second temperature difference component and the third temperature difference component may be set in advance according to the experimental result.
At this time, step S13 in fig. 1, namely, generating the fire alarm index according to the first accumulation factor, may specifically include: and generating a fire early warning index according to the weighted sum of the first accumulation factor and the third accumulation factor. The weights of the first accumulation factor and the third accumulation factor may be set in advance according to the experimental result.
In another embodiment of the present invention, the fire early warning method further includes, in addition to the above steps S11 to S13; and generating a fourth accumulation factor according to the temperature difference between the air outlet and the air inlet, wherein the temperatures of the air outlet and the air inlet can be respectively obtained by detecting through a temperature sensor, and the larger the temperature difference between the air outlet and the air inlet is, the larger the fourth accumulation factor is. In addition, step S13 in fig. 1, namely, generating the fire alarm index according to the first accumulation factor may specifically include: and generating a fire early warning index according to the weighted sum of the first accumulation factor and the fourth accumulation factor. The weights of the first accumulation factor and the fourth accumulation factor may be set in advance according to the experimental result.
The electronic components of the uninterruptible power supply include a transformer, and the design transformation ratio of the transformer is usually determined, but in the operation process of the uninterruptible power supply, part of turn-to-turn short circuit of the transformer or breakage of silicon steel sheets may be caused due to the design defects, the service life, the working environment and the like of the transformer, which may not cause the uninterruptible power supply to fail to operate, but may greatly increase the risk of the operation of the uninterruptible power supply, and may also bring about fire hazard.
For this reason, in another embodiment of the present invention, the fire early warning method further includes, in addition to the above steps S11 to S13: detecting actual primary side electrical parameters (such as voltage and/or current) and actual secondary side electrical parameters (such as voltage and/or current) of the transformer, and generating an actual transformer transformation ratio according to the actual primary side electrical parameters and the actual secondary side electrical parameters; and generating a fifth accumulation factor according to the actual transformer transformation ratio and the design transformer transformation ratio (the design transformer transformation ratio can be stored in a data storage chip of the uninterruptible power supply before the uninterruptible power supply leaves a factory), wherein the fifth accumulation factor is increased along with the increase of the difference between the actual transformer transformation ratio and the design transformer transformation ratio, namely the fifth accumulation factor is increased when the deviation of the actual transformer transformation ratio and the design transformer transformation ratio is larger. In addition, step S13 in fig. 1, namely, generating the fire early warning index according to the first accumulation factor may specifically include: and generating a fire early warning index according to the weighted sum of the first accumulation factor and the fifth accumulation factor. The weights of the first accumulation factor and the fifth accumulation factor may be set in advance according to the experimental result.
In another embodiment of the present invention, a humidity sensor may be further disposed in the working area of the cabinet, and accordingly, the fire early warning method further includes, in addition to the above steps S11 to S13: and detecting humidity data of a humidity sensor in the working area, and generating a sixth accumulation factor according to the humidity data, wherein the sixth accumulation factor is increased along with the reduction of the humidity data. In addition, step S13 in fig. 1, namely, generating the fire alarm index according to the first accumulation factor may specifically include: and generating a fire early warning index according to the weighted sum of the first accumulation factor and the sixth accumulation factor. The weights of the first accumulation factor and the sixth accumulation factor may be set in advance according to the experimental result.
Particularly, in an embodiment of the present invention, the first accumulation factor, the second accumulation factor, the third accumulation factor, the fourth accumulation factor, the fifth accumulation factor, and the sixth accumulation factor may be obtained simultaneously, and the fire early warning index is formed by a weighted sum of the first accumulation factor, the second accumulation factor, the third accumulation factor, the fourth accumulation factor, the fifth accumulation factor, and the sixth accumulation factor, that is, a fire is predicted according to a method of mutually combining a temperature, a humidity, a voltage, a current, a temperature control signal, and the like in a current operation state of the uninterruptible power supply, so as to greatly improve accuracy and timeliness of fire early warning. In practical application, of course, multiple first accumulation factors, multiple second accumulation factors, multiple third accumulation factors, multiple fourth accumulation factors, multiple fifth accumulation factors, and multiple sixth accumulation factors may be selected according to the use situation and fire-protection level requirements of the uninterruptible power supply to obtain the fire alarm warning index, and corresponding warning actions may be executed according to the fire alarm warning index.
In addition, a smoke sensor can be arranged in the working area of the cabinet, and accordingly, the fire early warning method comprises the following steps in addition to the steps S11 to S13: detecting the state of a smoke sensor in a working area; when the smoke sensor is triggered to be effective, the fire early warning index reaches the maximum value, namely the uninterrupted power supply is directly turned off and all power modules in the uninterrupted power supply are turned off, a display interface prompts a serious alarm, and the honey early warning is continued.
The embodiment of the invention also provides the uninterruptible power supply which comprises a memory and a processor, wherein the processor can be a main controller of the uninterruptible power supply and can also be formed by a chip independent of the main controller. Wherein a computer program executable in a processor is stored in the memory and the processor implements the fire early warning method as described above when executing the computer program.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A fire early warning method is applied to an uninterruptible power supply, the uninterruptible power supply comprises a cabinet and electronic elements, the cabinet comprises an air inlet, an air outlet and a working area located between the air inlet and the air outlet, and the electronic elements are installed in the working area, and the method is characterized by comprising the following steps executed according to a preset period:
under the current working condition of the uninterruptible power supply, adjusting the working state of the uninterruptible power supply according to a preset mode;
generating a first accumulation factor according to the actual temperature parameter in the cabinet and a prestored reference temperature parameter under the same working condition before and after the adjustment of the working state of the uninterruptible power supply;
generating a fire early warning index according to the first accumulation factor, and outputting an alarm signal when the fire early warning index reaches a preset value;
the uninterruptible power supply comprises a cooling fan positioned in the cabinet, and the working conditions comprise a load factor, an ambient temperature and a rotating speed of the cooling fan;
adjusting the working state of the uninterruptible power supply according to a preset mode comprises the following steps: adjusting the rotating speed of the cooling fan according to a preset mode;
the reference temperature parameter comprises a reference temperature rate of change, the actual temperature parameter comprises an actual temperature rate of change, and the first accumulation factor decreases as a ratio of the actual temperature rate of change to the reference temperature rate of change increases; alternatively, the first and second electrodes may be,
the reference temperature parameter comprises a reference temperature change value, the actual temperature parameter comprises an actual temperature change value, and the first accumulation factor increases as a ratio of the actual temperature change value to the reference temperature change value increases;
the electronic element comprises a magnetic element, a semiconductor element and a filter capacitor, the working area comprises a magnetic element area, a semiconductor element area and a filter capacitor area, the magnetic element is arranged in the magnetic element area, the semiconductor element is arranged in the semiconductor element area, and the filter capacitor is arranged in the filter capacitor area;
the pre-stored reference temperature parameters comprise reference temperature parameters of the magnetic element area, reference temperature parameters of the semiconductor element area and reference temperature parameters of the filter capacitor area;
according to before the operating condition adjustment of uninterrupted power source, the actual temperature parameter in the rack and the reference temperature parameter of prestoring under the same operating mode generate first accumulation factor, include:
generating a first temperature variation component by the actual temperature parameter in the magnetic element area and a prestored reference temperature parameter of the magnetic element area under the same working condition before and after the adjustment of the working state of the uninterruptible power supply;
generating a second temperature variation component by the actual temperature parameter in the semiconductor element area and a prestored reference temperature parameter of the semiconductor element area under the same working condition before and after the adjustment of the working state of the uninterruptible power supply;
generating a third temperature-variable component by the actual temperature parameter in the filter capacitor area and a prestored reference temperature parameter of the filter capacitor area under the same working condition before and after the adjustment of the working state of the uninterruptible power supply;
and generating the first accumulation factor according to the weighted sum of the first temperature-variable component, the second temperature-variable component and the third temperature-variable component.
2. A fire early warning method according to claim 1, wherein the magnetic element region is provided with a first temperature control unit, the semiconductor element region is provided with a second temperature control unit, and the filter capacitor region is provided with a third temperature control unit; the method further comprises the following steps:
generating a first temperature control component when the first temperature control unit generates an effective temperature control signal;
generating a second temperature control component when the second temperature control unit generates an effective temperature control signal;
generating a third temperature control component when the third temperature control unit generates an effective temperature control signal;
generating a second accumulation factor according to the weighted sum of the first temperature control component, the second temperature control component and the third temperature control component;
the generating of the fire early warning index according to the first accumulation factor comprises: and generating the fire early warning index according to the weighted sum of the first accumulation factor and the second accumulation factor.
3. A fire early warning method as recited in claim 2, further comprising:
generating a first temperature difference component according to the temperature difference between the magnetic element area and the air inlet;
generating a second temperature difference component according to the temperature difference between the semiconductor element area and the air inlet;
generating a third temperature difference component according to the temperature difference between the filter element area and the air inlet;
generating a third accumulation factor according to the first temperature difference component, the second temperature difference component and the third temperature difference component;
generating a fire warning index according to the first accumulation factor includes: and generating the fire early warning index according to the weighted sum of the first accumulation factor and the third accumulation factor.
4. A fire early warning method according to claim 1, wherein the method further comprises;
generating a fourth accumulation factor according to the temperature difference between the air outlet and the air inlet;
the generating of the fire early warning index according to the first accumulation factor comprises: and generating the fire early warning index according to the weighted sum of the first accumulation factor and the fourth accumulation factor.
5. A fire early warning method as recited in claim 1 wherein the electronic component comprises a transformer, the method further comprising:
detecting actual primary side electrical parameters and actual secondary side electrical parameters of the transformer, and generating an actual transformer transformation ratio according to the actual primary side electrical parameters and the actual secondary side electrical parameters, wherein the actual primary side electrical parameters comprise actual primary side voltage and/or current of the transformer, and the actual secondary side electrical parameters comprise actual secondary side voltage and/or current of the transformer;
generating a fifth accumulation factor according to the actual transformer transformation ratio and a designed transformer transformation ratio, wherein the fifth accumulation factor increases with the increase of the difference between the actual transformer transformation ratio and the designed transformer transformation ratio;
generating a fire warning index according to the first accumulation factor includes: and generating the fire early warning index according to the weighted sum of the first accumulation factor and the fifth accumulation factor.
6. A fire early warning method as recited in claim 1, further comprising:
detecting humidity data of a humidity sensor in the working area;
generating a sixth accumulation factor from the humidity data, the sixth accumulation factor increasing as the humidity data decreases;
generating a fire warning index according to the first accumulation factor includes: and generating the fire early warning index according to the weighted sum of the first accumulation factor and the sixth accumulation factor.
7. A fire early warning method according to any one of claims 1 to 6, wherein the method comprises:
detecting a state of a smoke sensor within the work area;
and when the smoke sensor is triggered to be effective, enabling the fire early warning index to reach a maximum value.
8. An uninterruptible power supply comprising a memory and a processor, wherein the memory stores a computer program executable in the processor, and the processor executes the computer program to implement the fire warning method according to any one of claims 1 to 7.
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