CN111001115A - Fire protection judgment method and system for fire-fighting linkage transformer - Google Patents
Fire protection judgment method and system for fire-fighting linkage transformer Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000000523 sample Substances 0.000 claims description 7
- 239000006260 foam Substances 0.000 description 4
- 230000000875 corresponding effect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/005—Delivery of fire-extinguishing material using nozzles
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
- A62C37/40—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with electric connection between sensor and actuator
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Abstract
A fire protection judgment method and a fire protection judgment system for a fire-fighting linkage transformer are provided, wherein the method comprises the following steps: acquiring a monitoring signal output by a fire sensor in the range of a transformer, and judging whether a fire disaster exists or not; acquiring and judging whether a state signal of a switch connected with a transformer is a sub-position state signal or not, wherein the switch is used for connecting and disconnecting the transformer and a power grid; acquiring and judging whether the voltage quantity and the current quantity of the transformer are both 0 or not; if a fire exists, the state signal of the switch is a position-separating state signal, the voltage quantity and the current quantity are both 0, an action permission signal of the fire fighting equipment is output, and otherwise, the fire fighting equipment is forbidden to act. According to the invention, by adopting the logic judgment of combining a fire signal, a position-separating state signal, a voltage quantity, a current quantity and other signals, a protection action signal is output only under the condition that four conditions are simultaneously met, namely an action-allowing signal of the fire-fighting equipment, so that the logic judgment is more accurate, and the anti-misoperation capability is improved.
Description
Technical Field
The invention relates to the field of electric fire protection, in particular to a method and a system for judging fire protection of a transformer for fire protection linkage.
Background
The transformer is an extremely important electrical equipment in a power transmission and distribution system, as the insulating liner and the support in the transformer are mostly made of organic combustible substances such as paperboards, cotton yarns, cloth, wood and the like, and a large amount of combustible insulating oil is also contained in the transformer, once the transformer is seriously overloaded and short-circuited, the combustible substances can be decomposed and expanded to be gasified under the action of high temperature or electric arc, so that the internal pressure of the transformer is increased suddenly, the transformer leaks out to cause fire, the transformer can explode to cause a case to cause explosion, a large amount of oil is sprayed, and the oil flow generated by combustion further expands the harm of the fire, therefore, the fire protection of the transformer is an extremely important work.
At present, the judgment logic of transformer fire protection is relatively simple, and generally, the alarm signal of a fire sensor and the transformer switching value signal are only used as the judgment logic of fire protection action, so as to determine the input signal of the fire protection action. However, the alarm signal of the fire sensor and the transformer switching value signal are relatively easy to be interfered, so that the malfunction of the fire fighting equipment is easily caused, and further, the main and auxiliary equipment is stopped, and unnecessary economic loss is caused.
Therefore, it is very necessary to further improve the fire protection judgment logic of the transformer to improve the malfunction prevention capability.
Disclosure of Invention
The invention provides a method and a system for judging fire protection of a transformer for fire protection linkage, aiming at solving the technical problems that the judgment logic of the existing transformer fire protection is relatively simple and the misoperation of fire-fighting equipment is easily caused.
In order to achieve the purpose, the invention provides a fire protection judgment method for a fire-fighting linkage transformer, which comprises the following steps:
acquiring a monitoring signal output by a fire sensor in the range of a transformer, and judging whether a fire disaster exists or not;
acquiring and judging whether a state signal of a switch connected with a transformer is a sub-position state signal or not, wherein the switch is used for connecting and disconnecting the transformer and a power grid;
acquiring and judging whether the voltage quantity and the current quantity of the transformer are both 0 or not;
if a fire exists, the state signal of the switch is a position-separating state signal, the voltage quantity and the current quantity are both 0, an action permission signal of the fire fighting equipment is output, and otherwise, the fire fighting equipment is forbidden to act.
As a further preferable technical solution of the present invention, the acquiring a monitoring signal output by a fire sensor within a range in which the transformer is located, and determining whether a fire disaster exists specifically includes:
the fire sensor is provided with X fire sensors within the range of the transformer, if the detection signal output by any one fire sensor is '1', the fire sensor outputs a fire alarm signal, otherwise, the fire sensor outputs '0';
if at least n fire sensors in the X fire sensors output 1 at the same time, judging that a fire disaster exists in the range of the transformer;
wherein X is an integer not less than 3, and n is a preset positive integer less than or equal to X.
As a further preferable technical scheme of the invention, the fire-fighting sensor is a fire-fighting temperature-sensing transformer, an infrared probe or an ultraviolet flame UV detector.
As a further preferable technical solution of the present invention, the acquiring and determining whether the state signal of the switch connected to the transformer is a tap state signal specifically includes:
acquiring a state signal of the switch, and acquiring a position division state signal of which the signal output by the switch is 1 if the switch is in a position division state; the switch is a circuit breaker.
As a further preferable technical solution of the present invention, the obtaining and determining whether the voltage amount and the current amount of the transformer are both 0 specifically includes:
acquiring the voltage of the transformer through a voltage transformer, and obtaining the voltage quantity through analog-to-digital conversion and effective value calculation;
obtaining the current of the transformer through a current transformer, and obtaining the current magnitude through analog-to-digital conversion and effective value calculation;
it is determined whether or not both the voltage amount and the current amount are 0.
According to another aspect of the present invention, the present invention further provides a system for fire protection judgment method of a fire-fighting linkage transformer, the system comprising:
the fire detection module is used for acquiring a monitoring signal output by the fire sensor in the range of the transformer and judging whether a fire exists or not;
the switch state detection module is used for acquiring and judging whether a state signal of a switch connected with the transformer is a position division state signal or not, and the switch is used for on-off connection of the transformer and a power grid;
the voltage and current detection module is used for acquiring and judging whether the voltage quantity and the current quantity of the transformer are both 0 or not;
and the fire-fighting linkage judging module is used for outputting an action permission signal of the fire-fighting equipment if a fire disaster exists, the state signal of the switch is a position division state signal, and the voltage quantity and the current quantity are both 0, otherwise, the fire-fighting equipment prohibits action.
As a further preferable technical scheme of the present invention, the fire sensor is provided with X number of the fire sensors within the range of the transformer, if the detection signal output by any one of the fire sensors is "1", the fire sensor outputs a fire alarm signal, otherwise, the fire sensor outputs "0"; if at least n fire sensors in the X fire sensors output 1 at the same time, judging that a fire disaster exists in the range of the transformer; wherein X is an integer not less than 3, and n is a preset positive integer less than or equal to X.
As a further preferable technical scheme of the invention, the fire-fighting sensor is a fire-fighting temperature-sensing transformer, an infrared probe or an ultraviolet flame UV detector.
In a further preferred embodiment of the present invention, the switch is a circuit breaker, and if the signal output by the circuit breaker in the open state is "1", the state signal output by the circuit breaker is a tap state signal.
As a further preferable aspect of the present invention, the voltage current detection module includes:
the voltage quantity acquisition unit is used for acquiring the voltage of the transformer through the voltage transformer and obtaining the voltage quantity through analog-to-digital conversion and effective value calculation;
the current quantity obtaining unit is used for obtaining the current of the transformer through the current transformer and obtaining the current quantity through analog-to-digital conversion and effective value calculation;
and the judging unit is used for judging whether the voltage quantity and the current quantity are both 0 or not.
According to the fire protection judgment method and the fire protection judgment system for the fire-fighting linkage transformer, the technical scheme is adopted, so that the fire protection judgment logic of the transformer is further improved compared with the traditional scheme, and the fire signal, the sublevel state signal, the voltage magnitude, the current magnitude and other signals are combined to judge the logic, so that the protection action signal is output only under the condition that four conditions are met simultaneously, namely the action allowable signal of the fire-fighting equipment, the logic judgment is more accurate, and the anti-misoperation capacity is improved.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a flowchart of a method of an embodiment of the present invention for fire protection of a transformer for fire protection linkage;
fig. 2 is a system block diagram of an example provided by the fire protection and judgment system for the fire-fighting linkage transformer of the present invention.
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments. In the preferred embodiments, the terms "upper", "lower", "left", "right", "middle" and "a" are used for clarity of description only, and are not used to limit the scope of the invention, and the relative relationship between the terms and the terms is not changed or modified substantially without changing the technical content of the invention.
As shown in fig. 1, the invention provides a fire protection judgment method for a fire-fighting linkage transformer, which comprises the following steps:
s101, acquiring a monitoring signal output by a fire sensor in the range of a transformer, and judging whether a fire disaster exists or not;
in specific implementation, the fire sensor is provided with X fire sensors within the range of the transformer, and detects a detection signal (also called as an action signal of the fire sensor) output by any one of the fire sensors and is a switching value, the action signal output by the fire sensor is an alarm signal output by the fire sensor after the fire sensor detects an environmental anomaly, if the output of the fire sensor is '1', the corresponding fire sensor detects the environmental anomaly, otherwise, the output is '0';
if at least n fire sensors in the X fire sensors output 1 at the same time, namely at least n fire sensors in the transformer coverage area detect environmental abnormality, so that a fire is judged to exist, and the fire condition of the same area is detected through a plurality of fire sensors to ensure the accuracy of fire alarm (namely fire signals);
wherein X is an integer not less than 3, n is a preset positive integer less than or equal to X, a plurality of fire sensors are introduced for logic judgment at the same time, and n is a minimum threshold value for judging the existence of fire and can be specifically set by designers according to specific requirements so as to prevent a single fire sensor from sending out an error signal to distinguish a true fire or a false fire.
In the concrete implementation, the fire sensors are fire-fighting temperature-sensing transformers, infrared probes or ultraviolet flame UV detectors, namely X fire sensors selected in the range of the same transformer can be one or more combinations, if 2 fire-fighting temperature-sensing transformers, 1 infrared probe and 1 ultraviolet flame UV detector are adopted in the same transformer coverage area, the selection is carried out according to different application environments, and therefore the accuracy of fire alarm detection is ensured. Of course, other types of fire sensors may be used, and are not limited thereto.
Step S102, acquiring and judging whether a state signal of a switch connected with a transformer is a position division state signal or not, wherein the switch is used for on-off connection of the transformer and a power grid;
in a specific implementation, the acquiring and determining whether the state signal of the switch connected to the transformer is a tap state signal specifically includes:
acquiring a state signal of a switch, wherein the state signal of the switch is a switching value signal, if the switch is in a position division state, acquiring a position division state signal of which the signal output by the switch is '1', at the moment, the switch is in an off state, otherwise, the signal output by the switch is '0', and the switch is in an on state;
the switch is used for on-off connection of the transformer and a power supply grid, and the power supply of the transformer is cut off by switching to a separated state, and the switch can be a breaker, and can also be other types of switches, which are not limited herein.
The purpose of the switch state detection is to ensure that the transformer in the area of the fire has been powered down before the fire protection system is activated.
Step S103, acquiring and judging whether the voltage quantity and the current quantity of the transformer are both 0;
in specific implementation, the obtaining and determining whether the voltage amount and the current amount of the transformer are both 0 specifically includes:
acquiring the voltage of the transformer through a voltage transformer, and obtaining the voltage quantity through analog-to-digital conversion and effective value calculation;
obtaining the current of the transformer through a current transformer, and obtaining the current magnitude through analog-to-digital conversion and effective value calculation;
it is determined whether or not both the voltage amount and the current amount are 0.
Wherein, the voltage and the current are calculated with effective values, and the effective values are used for measuring the amplitude of the voltage or the current so as to compare the voltage quantity and the current quantity.
And step S104, if a fire disaster exists, the state signal of the switch is a position division state signal, and the voltage quantity and the current quantity are both 0, outputting an action permission signal of the fire fighting equipment, otherwise, prohibiting the action of the fire fighting equipment.
Specifically, when it is determined that a fire disaster exists in the range of the transformer, the fire extinguishing system needs to be started to extinguish the fire when the fire disaster occurs, however, in the actual process, the fire extinguishing system is not allowed to be directly started under the condition that the transformer is not powered off, namely, water spraying is not allowed to extinguish the fire under the power-on state. Therefore, when a fire disaster is judged, the position division state signal of the switch in the transformer, the voltage quantity and the current quantity of the transformer are also judged, only when the switch in the transformer is in a position division (disconnection) state and no voltage and current exist in the transformer, namely under the condition that the four conditions are met simultaneously, the protection action signal can be output, namely the action permission signal of the fire fighting equipment, the fire fighting system executes corresponding action after obtaining the action permission signal, and if the foam spraying system sprays foam to extinguish the fire after being started, the method is more accurate in logic judgment of fire disaster linkage, and improves the misoperation prevention capability.
As shown in fig. 2, based on the same inventive concept, the present invention further provides a fire protection and determination system for a fire protection linkage transformer, comprising:
the fire detection module 201 is used for acquiring a monitoring signal output by the fire sensor in the range of the transformer and judging whether a fire exists;
the switch state detection module 202 is configured to acquire and judge whether a state signal of a switch connected to the transformer is a tap state signal, where the switch is used for on-off connection between the transformer and a power grid;
the voltage and current detection module 203 is used for acquiring and judging whether the voltage quantity and the current quantity of the transformer are both 0;
and the fire-fighting linkage judging module 204 is used for outputting an action permission signal of the fire-fighting equipment if a fire exists, the state signal of the switch is a position division state signal, and the voltage quantity and the current quantity are both 0, or else, the fire-fighting equipment prohibits action.
Specifically, after the fire detection module 201 detects the fire, it is determined that a fire exists in the range of the transformer, and when the fire occurs, the fire protection system needs to be started to extinguish the fire. Therefore, when a fire disaster is judged, the position division state signal of the switch in the transformer, the voltage quantity and the current quantity of the transformer are also judged, and only when the switch in the transformer is in a position division (disconnection) state and no voltage and current exist in the transformer, and under the condition that the four conditions are simultaneously met, a protection action signal can be output, namely an action allowing signal of fire fighting equipment, a fire fighting system executes corresponding action after obtaining the action allowing signal, and if the foam spraying system sprays foam to extinguish the fire after being started, the method is more accurate in logic judgment of fire disaster linkage, and improves the misoperation prevention capability.
In specific implementation, the number of the fire sensors is X in the range of the transformer, if a detection signal output by any one fire sensor is '1', the fire sensor outputs a fire alarm signal, otherwise, the fire sensor outputs '0';
if at least n fire sensors in the X fire sensors output 1 at the same time, judging that a fire disaster exists in the range of the transformer;
wherein X is an integer not less than 3, and n is a preset positive integer less than or equal to X.
In specific implementation, the fire sensor is a fire-fighting temperature-sensing transformer, an infrared probe or an ultraviolet flame UV detector, namely one or a plurality of fire sensors can be selected from X fire sensors in the range of the same transformer, and of course, other types of fire sensors can also be adopted.
In a specific implementation, the switch is a circuit breaker, and if a signal output by the circuit breaker in an off state is "1", a state signal output by the circuit breaker is a stepping state signal.
In a specific implementation, the voltage and current detection module 203 includes:
the voltage quantity acquisition unit is used for acquiring the voltage of the transformer through the voltage transformer and obtaining the voltage quantity through analog-to-digital conversion and effective value calculation;
the current quantity obtaining unit is used for obtaining the current of the transformer through the current transformer and obtaining the current quantity through analog-to-digital conversion and effective value calculation;
and the judging unit is used for judging whether the voltage quantity and the current quantity are both 0 or not.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many variations or modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.
Claims (10)
1. A fire protection judgment method for a fire-fighting linkage transformer is characterized by comprising the following steps:
acquiring a monitoring signal output by a fire sensor in the range of a transformer, and judging whether a fire disaster exists or not;
acquiring and judging whether a state signal of a switch connected with a transformer is a sub-position state signal or not, wherein the switch is used for connecting and disconnecting the transformer and a power grid;
acquiring and judging whether the voltage quantity and the current quantity of the transformer are both 0 or not;
if a fire exists, the state signal of the switch is a position-separating state signal, the voltage quantity and the current quantity are both 0, an action permission signal of the fire fighting equipment is output, and otherwise, the fire fighting equipment is forbidden to act.
2. The fire protection and judgment method for the fire-fighting linkage transformer according to claim 1, wherein the step of acquiring the monitoring signal output by the fire sensor in the range of the transformer and judging whether a fire exists specifically comprises the steps of:
the fire sensor is provided with X fire sensors within the range of the transformer, if the detection signal output by any one fire sensor is '1', the fire sensor outputs a fire alarm signal, otherwise, the fire sensor outputs '0';
if at least n fire sensors in the X fire sensors output 1 at the same time, judging that a fire disaster exists in the range of the transformer;
wherein X is an integer not less than 3, and n is a preset positive integer less than or equal to X.
3. The fire protection and judgment method for the fire-fighting linkage transformer according to claim 2, wherein the fire-fighting sensor is a fire-fighting temperature-sensing transformer, an infrared probe or an ultraviolet flame UV detector.
4. The fire protection and judgment method for the fire-fighting linkage transformer according to claim 3, wherein the acquiring and judging whether the status signal of the switch connected to the transformer is the quantile status signal specifically comprises:
acquiring a state signal of the switch, and acquiring a position division state signal of which the signal output by the switch is 1 if the switch is in a position division state; the switch is a circuit breaker.
5. The fire protection judgment method for the fire-fighting linkage transformer according to any one of claims 1 to 4, wherein the obtaining and judging whether the voltage amount and the current amount of the transformer are both 0 specifically comprises:
acquiring the voltage of the transformer through a voltage transformer, and obtaining the voltage quantity through analog-to-digital conversion and effective value calculation;
obtaining the current of the transformer through a current transformer, and obtaining the current magnitude through analog-to-digital conversion and effective value calculation;
it is determined whether or not both the voltage amount and the current amount are 0.
6. A system for fire protection judgment method of transformer for fire protection linkage is characterized by comprising the following steps:
the fire detection module is used for acquiring a monitoring signal output by the fire sensor in the range of the transformer and judging whether a fire exists or not;
the switch state detection module is used for acquiring and judging whether a state signal of a switch connected with the transformer is a position division state signal or not, and the switch is used for on-off connection of the transformer and a power grid;
the voltage and current detection module is used for acquiring and judging whether the voltage quantity and the current quantity of the transformer are both 0 or not;
and the fire-fighting linkage judging module is used for outputting an action permission signal of the fire-fighting equipment if a fire disaster exists, the state signal of the switch is a position division state signal, and the voltage quantity and the current quantity are both 0, otherwise, the fire-fighting equipment prohibits action.
7. The fire protection and judgment system for the fire-fighting linkage transformer according to claim 6, wherein the number of the fire sensors is X within the range of the transformer, if the detection signal output by any one of the fire sensors is "1", the fire sensor outputs a fire alarm signal, otherwise, the fire sensor outputs "0";
if at least n fire sensors in the X fire sensors output 1 at the same time, judging that a fire disaster exists in the range of the transformer;
wherein X is an integer not less than 3, and n is a preset positive integer less than or equal to X.
8. The fire protection and judgment system for the fire-fighting ganged transformer according to claim 7, wherein the fire-fighting sensor is a fire-fighting temperature-sensing transformer, an infrared probe or an ultraviolet flame UV detector.
9. The fire protection and fire protection system for a fire-fighting ganged transformer according to claim 8, wherein the switch is a circuit breaker, and if the signal output by the circuit breaker in the off state is "1", the state signal output by the circuit breaker is a tap state signal.
10. The fire protection and judgment system for the transformer of the fire protection linkage according to any one of claims 6 to 9, wherein the voltage and current detection module comprises:
the voltage quantity acquisition unit is used for acquiring the voltage of the transformer through the voltage transformer and obtaining the voltage quantity through analog-to-digital conversion and effective value calculation;
the current quantity obtaining unit is used for obtaining the current of the transformer through the current transformer and obtaining the current quantity through analog-to-digital conversion and effective value calculation;
and the judging unit is used for judging whether the voltage quantity and the current quantity are both 0 or not.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911247939.7A CN111001115A (en) | 2019-12-09 | 2019-12-09 | Fire protection judgment method and system for fire-fighting linkage transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911247939.7A CN111001115A (en) | 2019-12-09 | 2019-12-09 | Fire protection judgment method and system for fire-fighting linkage transformer |
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| CN111001115A true CN111001115A (en) | 2020-04-14 |
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| CN201337778Y (en) * | 2009-02-12 | 2009-11-04 | 保定天威集团有限公司 | Control circuit for transformer fire extinguisher with maloperation prevention |
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2019
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