CN109389797A - A kind of fire early-warning system and method for photovoltaic plant - Google Patents
A kind of fire early-warning system and method for photovoltaic plant Download PDFInfo
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- CN109389797A CN109389797A CN201710680093.0A CN201710680093A CN109389797A CN 109389797 A CN109389797 A CN 109389797A CN 201710680093 A CN201710680093 A CN 201710680093A CN 109389797 A CN109389797 A CN 109389797A
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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
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
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Abstract
The invention discloses a kind of fire early-warning system for photovoltaic plant, which has: configuring a plurality of temperature sensing optical fiber in photovoltaic plant, demarcates all monitoring points in this optical fiber, output optical fibre scattered signal using included rice device for mark；More thermometric hosts, every thermometric host is connect with several temperature sensing optical fibers, in the fibre scattering signal for the temperature sensing optical fiber output that interval preset time period acquisition is attached thereto, and the position data, scene temperature and temperature grade of each monitoring point are calculated, export the monitoring point temperature data group under all monitoring points；Monitoring host computer is connect with more thermometric hosts, monitors all thermometric hosts, receives and parses through monitoring point temperature data group, is carried out Data Analysis Services to parsing result, is exported warning message.The present invention has perfect fire alarm mechanism, and monitoring point registration, monitoring distance is long, and flexibility is high, strong antijamming capability, and all settings are completed in terminal, and whole system is simple and reliable.
Description
Technical field
The present invention relates to photovoltaic plant alarm monitoring technical fields, pre- more particularly, to a kind of fire for photovoltaic plant
Alert system.
Background technique
With the intensification of energy crisis, photovoltaic industry enters the fast-developing phase in recent years, will necessarily while fast-developing
More and more security risks are brought, wherein the fire problem of photovoltaic plant, the fire of especially distributed roof photovoltaic power station,
Once occurring, it is likely to result in the person that can not be estimated, property loss, in order to reduce the generation of fire incident, on the one hand should be mentioned
On the other hand high yield quality should increase precautionary measures.
Photovoltaic plant fire alarm is mostly using the temperature monitoring technique of cable mode at present, in cable by two or
Multiple conducting wires composition, when variation of ambient temperature, leads line resistance and changes, reach the alarm threshold value of setting in resistance variations
When, detector issues fire alarm signal.But photovoltaic plant field condition is complicated, and especially distributed roof photovoltaic power station is adopted
Carrying out temperature monitoring with the method, there are the following problems:
1) precision is low, can only can not be accurately positioned alarm point using a certain local line segment as alarm unit；
2) monitoring range is small, and general alarm unit upper length limit is 200m；
3) it vulnerable to electromagnetic interference, is often reported by mistake in forceful electric power environment.The interference of light current environment can be resisted, but can not be strong
Not by any interference in the environment of electromagnetic field；
4) alarm temperature cannot be modified arbitrarily, can only alarm the temperature of setting, can not judge in not alarm condition
Under temperature regime and temperature development trend, flexibility is poor, though for more expensive 4 core cable formula heat detector of analog quantity
Right alarm temperature is adjustable, but precision is not high；
5) temperature-sensitive insulating materials is used, often the sensitive characteristic of insulating materials destroys after alarm, and at short-circuit condition, it is difficult to
Restore, can not reuse, can only re-replace, maintenance workload is big；
6) due to using electric signal, when insulating very fragile between conducting wire, high current or short circuit are easy to produce to shape
At electric spark and fire is generated, is easy in this way due to temperature-sensitive especially in the high-tension cable tunnel for having strong-electromagnetic field
The quality problems of itself and form fire, therefore, prior art itself can also cause the safe operation of on-site cable system hidden
Suffer from.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of fire early-warning systems for photovoltaic plant, this is
System has: configuring a plurality of temperature sensing optical fiber in photovoltaic plant, demarcates all prisons in this optical fiber using included rice device for mark
Measuring point, output optical fibre scattered signal；More thermometric hosts, the temperature sensing optical fiber output that preset time period acquisition in interval is attached thereto
The fibre scattering signal, using to temperature effect principle, calculating each monitoring point after optical time domain reflection and optical fiber
Monitoring point temperature information, and according to preset temperature grade sets of threshold values, the monitoring point temperature grade of each monitoring point is obtained,
Export the monitoring point temperature data group under all monitoring points, wherein the monitoring point temperature data group includes: under the monitoring point
The monitoring point temperature information and the monitoring point temperature grade；Monitoring host computer is connect with more thermometric hosts, monitors institute
Have the thermometric host, receive and parse through the monitoring point temperature data group that the thermometric host is sent, to parsing result into
Row Data Analysis Services export warning message.
Preferably, the monitoring host computer is configured to the host equipment being separately provided or integrated for any thermometric host
The host equipment of the monitoring host computer function.
Preferably, the monitoring host computer is connect by optical fiber ring network with more thermometric hosts, and the optical fiber ring network has
Several optical fiber switch and optical fiber are connected adjacent optical fiber switch by the optical fiber, constitute an annular local
Net；Every optical fiber switch is connect with a host equipment, and the host equipment includes the thermometric host or described
Monitoring host computer.
Preferably, the monitoring point temperature information includes that monitoring location data under same monitoring point and monitoring point are existing
Field temperature, the monitoring point includes solar panel or cable.
Preferably, further, the monitoring host computer utilizes the quantity of the thermometric host, and according to the thermometric master
The monitoring region of the monitoring host computer is divided into several level-ones monitoring region, wherein any described one by the monitoring range of machine
Grade monitoring region is the monitoring region of the corresponding thermometric host.
Preferably, further, the thermometric host is stored with one group of temperature grade sets of threshold values, new based on input
The temperature grade sets of threshold values is updated the corresponding data of the machine；The monitoring host computer, to any thermometric host
The temperature grade sets of threshold values under corresponding level-one monitoring region is set.
Preferably, the temperature grade sets of threshold values includes report corresponding with early warning and at least two grade of fire alarm
Alert temperature threshold and/or alarm temperature rise rate threshold value, further, the thermometric host will be described in each monitoring point
Monitoring point scene temperature be compared respectively with multiple alarm temperature threshold values in same group or by it is adjacent measure twice it is same
The heating rate of the monitoring point scene temperature of monitoring point is compared with multiple alarm heating rate threshold values, obtains the monitoring
The monitoring temperature grade of point.
Preferably, the monitoring host computer further utilizes the monitoring point temperature information, the monitoring point temperature grade
With the temperature grade sets of threshold values under all level-ones monitorings regions, count all monitoring points warning message and
The temperature curve of every temperature sensing optical fiber, wherein the warning message includes: to be respectively at warning grade and fire alarm etc.
Monitoring point quantity, monitoring location and the alarm alert signal of grade.
Preferably, further, the monitoring host computer has the database for being stored with monitoring point temperature data group；The thermometric
Host sends the query context information about the machine to the monitoring host computer, and receives the prison in corresponding query context
Measuring point temperature data group；The monitoring host computer is transferred satisfaction from database described in the machine and is looked into according to the query context of input
Ask the monitoring point temperature data group of range.
On the other hand, a kind of fire alarm method for photovoltaic plant is provided, the photovoltaic plant has institute as above
The fire early-warning system stated, this method comprises the following steps: temperature information acquisition step: temperature sensing optical fiber is demarcated in this optical fiber
All monitoring points, output optical fibre scattered signal, thermometric host interval preset time period acquire the institute connecting with the thermometric host
Fibre scattering signal is stated, using to temperature effect principle, calculating the monitoring of each monitoring point after optical time domain reflection and optical fiber
Point temperature information, the monitoring point temperature information include monitoring location data and monitoring point scene temperature under same monitoring point
Degree, further, the monitoring point includes solar panel or cable；Temperature grade determination step: the thermometric host according to
Preset temperature grade sets of threshold values obtains the monitoring point temperature etc. of each monitoring point using the monitoring point temperature information
Grade, exports the monitoring point temperature data group under all monitoring points, wherein the monitoring point temperature data group includes: the monitoring
The monitoring point temperature information and the monitoring point temperature grade under point；Warning message exports step: the monitoring host computer connects
The monitoring point temperature data group that all thermometric hosts are sent is received and parsed, parsing result is carried out at data analysis
Reason exports warning message.
Compared with prior art, one or more embodiments in above scheme can have following advantage or beneficial to effect
Fruit:
The present invention provides a kind of fire early-warning system for photovoltaic plant based on temperature sensing optical fiber, real-time monitoring photovoltaic group
The temperature of part or cable everywhere achievees the purpose that the early warning ahead of time before fire occurs, and registration, monitoring distance is long, flexibly
Property high, strong antijamming capability, all settings complete in terminal, and whole system is simple and reliable.
Although describing the present invention, those skilled in the art hereinafter in connection with some exemplary implementations and application method
Member is it should be appreciated that be not intended to limit the invention to these embodiments.It is on the contrary, it is intended to which that covering is included in appended right and wants
Seek all substitutes, amendment and the equivalent in spirit and scope of the invention defined in book.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.Target and other advantages of the invention can be wanted by following specification, right
Specifically noted structure is sought in book and attached drawing to be achieved and obtained.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example and is used together to explain the present invention, be not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the network topological diagram of the photovoltaic plant fire early-warning system of the embodiment of the present application；
Fig. 2 is the data and signal flow figure of the photovoltaic plant fire early-warning system of the embodiment of the present application；
Fig. 3 is the implementation flow chart of the photovoltaic plant fire early-warning system of the embodiment of the present application；
Fig. 4 is network topological diagram (the thermometric host integrated monitoring of the photovoltaic plant fire early-warning system of the embodiment of the present application
Host function).
Specific embodiment
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, how to apply to the present invention whereby
Technological means solves technical problem, and the realization process for reaching technical effect can fully understand and implement.It needs to illustrate
As long as not constituting conflict, each feature in each embodiment and each embodiment in the present invention can be combined with each other,
It is within the scope of the present invention to be formed by technical solution.
In order to overcome the deficiencies in the prior art described above, the present embodiment proposes a kind of photovoltaic plant based on temperature sensing optical fiber
Fire early-warning system, using the attribute of temperature sensing optical fiber and fiber plant, construct fire early-warning system network topology structure and
The new embodiment of the whole network perforation, the network structure is simple and strong antijamming capability, has high-precision monitoring data, perfect
Fire alarm mechanism, TOCOM total communication inquiry and personal settings early-warning parameters function.
Fig. 1 is the network topological diagram of the photovoltaic plant fire early-warning system of the embodiment of the present application.As shown in Figure 1, the early warning
System has such as lower component: monitoring host computer, thermometric subsystem, optical fiber ring network including thermometric host and several temperature sensing optical fibers.Under
Face is described in detail for the connection type of the network topology structure.
Firstly, optical fiber ring network has several optical fiber switch and optical fiber, all adjacent optical fiber are handed over by optical fiber
It changes planes and connects one by one, constitute a ring local-area network, every optical fiber switch is connect with a host equipment, wherein
Host equipment includes thermometric host or monitoring host computer, and monitoring host computer is connect by optical fiber ring network with more thermometric hosts.
With reference to Fig. 1, specifically, in the embodiment of the present application, optical fiber ring network is by three optical fiber ring network interchangers and optical fiber group
At monitoring host computer is connect with 1# ring exchanger by cable, and 1# thermometric host and 2# optical fiber ring network interchanger are connected by cable
It connects, 2# thermometric host is connect with 3# optical fiber ring network interchanger by cable；1# optical fiber ring network interchanger, 2# optical fiber ring network interchanger
It is connect two-by-two between 3# optical fiber ring network interchanger using optical fiber.Wherein, 1# optical fiber ring network interchanger, 2# optical fiber ring network interchanger
With 3# optical fiber ring network group of switches at optical fiber ring network, monitoring host computer, 1# thermometric host and 2# thermometric host are formed into an annular
Local area network.It should be noted that the application is not especially limited for the optical fiber switch quantity in optical fiber ring network, the application is real
The personnel of applying can carry out adjustment appropriate according to the actual situation；In addition, the application is not especially limited also directed to the type of interchanger,
The present invention can also be realized by forming common loop network using general switch.
Referring again to FIGS. 1, every thermometric host can be connect with several temperature sensing optical fibers.In the embodiment of the present application,
The system has 2 thermometric hosts, and every thermometric host has four optical-fibre channels, and 1 temperature sensing optical fiber is accessed in each channel.Tool
Body, referring again to FIGS. 1,1# thermometric host includes 4 optical-fibre channels, it is respectively connected to 4 temperature sensing optical fibers, wherein 1 temperature-sensitive of channel
Optical fiber grows 3 kms, after the roof 1# surround laying along solar panel bottom or cable testing bridge, is linked into 1# thermometric host
Channel 1, measure the temperature of 1# roof solar solar panel or cable；2 temperature sensing optical fiber of channel grows 3 kms, on the roof 2# along too
In positive energy solar panel bottom or cable testing bridge after laying, it is linked into the channel 2 of 1# thermometric host, measures 2# roof solar
The temperature of solar panel or cable；3 temperature sensing optical fiber of channel grows 3 kms, on the roof 3# along solar panel bottom or cable testing bridge
It is interior to be linked into the channel 3 of 1# thermometric host after laying, measure the temperature of 3# roof solar solar panel or cable；Channel 4
Temperature sensing optical fiber grows 3 kms, after the roof 4# surround laying along solar panel bottom or cable testing bridge, is linked into 1# thermometric
The channel 4 of host measures the temperature of 4# roof solar solar panel or cable.In addition, 2# thermometric host includes that 4 optical fiber are logical
Road is respectively connected to 4 temperature sensing optical fibers, wherein long 3 kms of 1 temperature sensing optical fiber of channel, the roof 5# along solar panel bottom or
In cable testing bridge after laying, it is linked into the channel 1 of 2# thermometric host, measures the temperature of 5# roof solar solar panel or cable
Degree；2 temperature sensing optical fiber of channel grows 3 kms, after the roof 6# surround laying along solar panel bottom or cable testing bridge, access
To the channel 2 of 2# thermometric host, the temperature of 6# roof solar solar panel or cable is measured；3 temperature sensing optical fiber of channel grows 3 kms,
It is linked into the channel 3 of 2# thermometric host, measurement after laying along solar panel bottom or cable testing bridge on the roof 7#
The temperature of 7# roof solar solar panel or cable；4 temperature sensing optical fiber of channel grows 3 kms, on the roof 8# along solar battery board bottom
The channel 4 of 2# thermometric host is linked into portion or cable testing bridge after laying, measures 8# roof solar solar panel or cable
Temperature.It should be noted that in the embodiment of the present application, the length of temperature sensing optical fiber is 3 kms, and each thermometric host has four
A channel is separately connected four temperature sensing optical fibers, but the application is for the length of temperature sensing optical fiber and the channel of every thermometric host
Quantity is not especially limited, and the application, which implements personnel, to be set according to the actual situation.
In the field-mounted process of photovoltaic plant, it is monitored a little first, temperature sensing optical fiber carries rice marking device using it
The calibration of position；Second, temperature sensing optical fiber needs to select paving location according to actual monitoring equipment, for example, when needing to measure the sun
When energy plate temperature, the surrounding by temperature sensing optical fiber in solar panel backboard is laid；It, will when if desired measuring cable temperature
Temperature sensing optical fiber is laid in cable trough.It should be noted that monitoring site is setting in solar cell backboard in photovoltaic plant
Or on cable, further say, the shortest distance of two adjacent temperature sensing optical fiber monitoring points can be 0.25 meter.
It should be noted that temperature sensing optical fiber is directly accessed thermometric host, thermometric host sends laser arteries and veins into temperature sensing optical fiber
Punching, to be monitored the calculating and positioning of a scene temperature.Specifically, quartz medium of the temperature sensing optical fiber inside, a branch of
Under the action of the laser pulse sent by the thermometric host being attached thereto, the fibre scattering signal output it is sent to be connected with it
In the thermometric host connect.Thermometric host has the test point temperature based on optical time domain reflectometer and the building of fiber optic temperature effect principle
The fibre scattering signal received can be carried out signal analysis and processing, export the position of each monitoring point by collection model, the model
Set data and the scene temperature data under the monitoring point.In turn, temperature sensing optical fiber is completed for solar energy backboard or cable
Temperature acquisition process.
It further says, temperature sensing optical fiber temperature monitoring technique has the property that 1) registration, and monitoring distance is long, can
To clearly display the real-time temperature values of each monitoring point on detection route；2) flexibility is high, can arbitrarily be set by software
Alarm temperature value can set the Multi-stage alarmings mode such as low-temperature warning, early warning and fire alarm, can also be according to temperature rise rate report
It is alert, and alarming value is adjusted according to on-site actual situations, use is very flexible；3) strong antijamming capability is to carry with optical signal
Body can resist electromagnetic interference, reduce wrong report.
In the embodiment of the present application, several points need to illustrate for the acquisition effect of temperature sensing optical fiber.First, in the system
In, the minimum interval of the adjacent monitoring point of every temperature sensing optical fiber is 0.25 meter.Second, the signal acquisition periods of thermometric host are small
In or be equal to 5 seconds, a temperature data can be updated less than 5S.Third, the temperature measurement accuracy of temperature sensing optical fiber is ± 1 DEG C, temperature
Resolution ratio is 0.1 DEG C.
In addition, being said below for temperature sensing optical fiber for the location information of monitoring point and the acquisition principle of temperature information
It is bright.It is that scattering phenomenon has occurred since laser pulse is with after optical fiber interaction of molecules in the completion of the above process.Scattering has more
Kind, such as: Rayleigh (Rayleigh) scattering, Brillouin (Brillouin) scattering and Raman (Raman) scattering etc..Wherein, Raman
Scattering is the thermal vibration due to optical fiber molecule, it can generate a light longer than optical source wavelength, claims Stokes (Stokes) light,
With a light shorter than optical source wavelength, referred to as anti-Stokes (Anti-Stokes) light.Optical fiber is made light by the modulation of external temperature
Anti-Stokes (Anti-Stokes) light intensity in fibre changes, and the ratio of Anti-Stokes and Stokes provide temperature
Absolute instruction, may be implemented using this principle to the distributed measurement along fiber optic temperature field.
Secondly, optical fiber distributed temperature monitoring mainly utilizes optical time domain reflection (OTDR) technology and the backward loudspeaker of optical fiber
The temperature effect of graceful scattering (Raman Scattering) is realized.If from thermometric host to a branch of pulsed light of fibre optical transmission,
The pulsed light can be propagated forward along optical fiber, since there are microcosmic inhomogeneities, transmitting scatters light around simultaneously in optical fiber.
The a part for scattering light can return to incidence end along optical fiber again, measure the time difference T between incident light and reflected light, then transmitting dissipates
Penetrate distance X of the position away from incidence end of light are as follows:
Wherein, C indicates the light velocity in optical fiber；N indicates optical fibre refractivity.It is achievable to all monitoring locations as a result,
Calculating process, i.e. OTDR technique.
Fig. 2 is the data and signal flow figure of the photovoltaic plant fire early-warning system of the embodiment of the present application.As shown in Fig. 2,
In above topology structure implementation process, all parts carry out the interaction of data and signal using such as under type.
It needs to be laid with 8 temperature-sensitives respectively in the solar energy backboard or cable trough on the roof 1#~8# firstly, implementing personnel
Optical fiber (one temperature sensing optical fiber of each roofing, every temperature sensing optical fiber monitoring region is that second level monitors region), completion system is answered
With preceding preparation.1# thermometric host passes through the impulse semiconductor laser temperature-sensitive into the channel 1~4 being attached thereto respectively
Optical fiber sends laser pulse, meanwhile, 2# thermometric host is by impulse semiconductor laser respectively to the channel 1~4 being attached thereto
In temperature sensing optical fiber send laser pulse.Temperature sensing optical fiber is responsible for the temperature acquisition at scene, demarcates using its included rice device for mark
Behind all monitoring points in this optical fiber, by inside of optical fibre quartz medium, the collection result (fibre scattering of each optical fiber is returned to
Signal), and be delivered in corresponding thermometric host.Then, thermometric host interval preset time period acquires the temperature-sensitive being attached thereto
The fibre scattering signal of optical fiber output, using, to temperature effect principle, calculating each monitoring point after optical time domain reflection and optical fiber
Monitoring point temperature information, wherein monitoring point temperature information includes monitoring location data and monitoring point under same monitoring point
Scene temperature.Further, thermometric host obtains monitoring point temperature of each monitoring point etc. according to preset temperature grade sets of threshold values
Grade, exports the monitoring point temperature data group under all monitoring points, wherein the monitoring point temperature data group includes: all described
The monitoring point temperature information and the monitoring point temperature grade under monitoring point.
In the embodiment of the present application, thermometric host can monitor the region that all temperature sensing optical fibers being attached thereto are monitored,
According to the quantity of temperature sensing optical fiber quantity and thermometric host under temperature sensing optical fiber position, thermometric host, and according to thermometric master
The monitoring region of monitoring host computer arbitrarily can be divided into several level-ones monitoring region by the monitoring range of machine.The present invention is using every
The monitoring region of platform thermometric host is that the monitoring region of level-one monitoring region and every temperature sensing optical fiber is a second level prison
The region division mode in region is surveyed, the monitoring region of all thermometric hosts constitutes monitoring host supervision region, i.e. monitoring host can
Monitor whole monitoring point regions.One group of preset temperature grade sets of threshold values, temperature etc. are provided in every thermometric host
Grade sets of threshold values includes alarm temperature threshold value corresponding with warning grade and at least two grade of fire alarm grade and/or report
Alert temperature rise rate threshold value, by the monitoring point scene temperature of each monitoring point respectively with same group in multiple alarm temperature threshold values
It is compared or rises the heating rate of the monitoring point scene temperature of the adjacent same monitoring point measured twice and multiple alarms
Warm rate-valve value is compared, and obtains the monitoring temperature grade of the monitoring point.It should be noted that two kinds of hairs can be used in the present invention
Method calculates the temperature grade of monitoring point, first, utilizing alarm temperature threshold value corresponding to preset temperature grade；Second, utilizing
Alarm temperature rise threshold value corresponding to preset temperature grade, the application do not make specifically for the temperature grade calculation method of monitoring point
It limits, one of above two mode can be used and calculated, other methods also can be used, the application implements personnel can be according to scene
Application environment is designed.
(example)
If the temperature range of fire early-warning system is -40 DEG C~120 DEG C, by -30 DEG C, 70 DEG C and 95 DEG C (three alarms
Temperature threshold) temperature range of 1# thermometric host is divided into low temperature, normal, four grades of early warning and fire alarm, in 1#
In thermometric host, if the temperature of any temperature monitoring point is lower than -30 DEG C, the monitoring point temperature grade of the monitoring point is low temperature
Grade；If the temperature of any temperature monitoring point is lower than 70 DEG C and when being greater than or equal to -30 DEG C, the monitoring point temperature of the monitoring point
Grade is normal level；If the temperature of any temperature monitoring point is lower than 95 DEG C and is greater than or equal to 70 DEG C, the monitoring point
Monitoring point temperature grade is warning grade；If the temperature of any temperature monitoring point is greater than or equal to 95 DEG C, the monitoring point
Monitoring point temperature grade is fire alarm grade.Meanwhile the temperature range of the system is -40 DEG C~120 DEG C, by -20 DEG C, 75
DEG C and 100 DEG C (three alarm temperature threshold values) temperature range of 2# thermometric host is divided into low temperature, normal, early warning and fire
It alarms four grades, in 2# thermometric host, if the temperature of any temperature monitoring point is lower than -20 DEG C, the prison of the monitoring point
Measuring point temperature grade is low-temperature grade；If the temperature of any temperature monitoring point, should lower than 75 DEG C and when being greater than or equal to -20 DEG C
The monitoring point temperature grade of monitoring point is normal level；If the temperature of any temperature monitoring point is lower than 100 DEG C and is greater than or equal to
At 75 DEG C, then the monitoring point temperature grade of the monitoring point is warning grade；If the temperature of any temperature monitoring point is greater than or equal to
At 100 DEG C, then the monitoring point temperature grade of the monitoring point is fire alarm grade.
In the embodiment of the present application, thermometric host is stored with one group of temperature grade sets of threshold values, the new temperature based on input
Grade threshold group sets alarm temperature threshold value and/or alarm temperature rise rate threshold value that region is monitored belonging to the machine in real time
And change；Monitoring host computer can monitor region for different level-ones, set respectively to thermometric host belonging to each level-one monitoring region
Set different temperature grade sets of threshold values.It should be noted that the application is for the quantity of alarm level and its temperature of each grade
Degree range is not especially limited, and the application implements personnel can be according to photovoltaic plant position, annual temperature branch situation, institute
Locate alarm temperature threshold value corresponding to quantity and the grade of the material elements such as environment for alarm level and alarm temperature rise rate
Threshold value is adjusted in time or is set in real time.
After 1# thermometric host and 2# thermometric host obtain the temperature grade of each monitoring point, export under all monitoring points
Monitoring point temperature data group is into monitoring host computer, wherein each monitoring point temperature data group includes: the monitoring under all monitoring points
Point temperature information and monitoring point temperature grade.
Then, monitoring host computer receives and parses through the monitoring point temperature data group that 1# thermometric host and 2# thermometric host are sent,
Parsing result is executed respectively data analysis, data shows and data storage processing, output warning message, wherein monitoring host computer
Has the database for being stored with monitoring point temperature data group.Specifically, when monitoring host computer parses the monitoring of each monitoring point
After temperature grade belonging to point temperature information and the monitoring point, above-mentioned data are shown on monitoring host screen, and will be above-mentioned
Data automatically to be stored in monitoring host computer database as historical data timing, again using all monitoring point temperature datas and
Temperature grade sets of threshold values under all level-one monitorings region, counts the warning message and every temperature sensing optical fiber of all monitoring points
Temperature curve.Wherein, warning message includes: the monitoring point quantity for being respectively at warning grade and fire alarm grade, monitoring
Point position and alarm alert signal.(example) is if it is detected that the monitoring point quantity in warning grade is 40, in fire
When the monitoring point quantity of calamity alarm level is 10, monitoring host should show the monitoring point under the grade under early warning signal
Quantity and position, meanwhile, the monitoring point quantity of grade and position where being shown under fire disaster signal, to prompt operator
Site inspection is carried out, the subsequent operations such as put out a fire or alarmed in time.It should be noted that the embodiment of the present invention stores data
The time interval of movement is set as 1 minute, i.e. temperature number of the monitoring host computer every the primary all temperature monitoring points of storage in 1 minute
According to the application is not specifically limited for storage time interval, and the application, which implements personnel, to be adjusted according to the actual situation.
In addition, operator can initiate querying command from either host equipment, and open inquiry mechanism, wherein any
Thermometric host sends the query context information about the machine to monitoring host computer, and monitoring host computer issues the monitoring point for meeting query context
Temperature data group, finally, above-mentioned data are received and shown by thermometric host；In addition, inquiry of the monitoring host computer according to input
Range transfers the correspondence monitoring point temperature data group for meeting query context from native database.(example) works as operator
When the temperature data of each monitoring point that member is 17:00~17:10 with the time on inquiry 1# thermometric host from monitoring host computer, input
After query context, monitoring host transfers the monitoring point temperature data group for meeting query context information from native database, and shows
Show on monitoring host screen；(another example) sends inquiry about 2# thermometric host as operator on 2# thermometric host
In the temperature data for each monitoring point that the time is 16:20~16:30, after input inquiry range, 2# thermometric host is led to monitoring
Machine transmission inquery command signal simultaneously sends query context information, and monitoring host is according to above-mentioned query context information from its database
The monitoring point temperature data group for meeting query context information is transferred, and the query result met is fed back into 2# thermometric host, and
Query result is shown on its screen.
Fig. 3 is the system implementation flow chart of the photovoltaic plant fire early-warning system of the embodiment of the present application.As shown in figure 3, first
First, temperature data acquisition, and output optical fibre scattered signal are carried out by temperature sensing optical fiber；Later, the light that will be collected by thermometric host
Fine scattered signal carries out temperature data processing, obtains including monitoring location, monitoring point temperature and monitoring point temperature grade
Monitoring point temperature data group, and above-mentioned data group is sent to monitoring host computer；Finally, receiving all thermometric masters by monitoring host computer
The monitoring point temperature data group received is carried out data parsing, the temperature after parsing by the monitoring point temperature data group that machine is sent
Data display data respectively, the statistical decision of data storage and data, on the one hand, the temperature data of storage is for subsequent reality
The inquiry mechanism applied is called, and on the other hand, the statistical decision of temperature data is according to the temperature under each thermometric host supervision region
The setting value for spending grade threshold group, counts temperature data, exports early warning and the monitoring point quantity of fire alarm grade, position
It sets and corresponding standby signal.
It should be noted that the topological structure for the application monitoring host computer can be separately provided (such as Fig. 1 institute
Show), any thermometric host can also be integrated monitoring host computer function.Fig. 4 is the photovoltaic plant fire alarm of the embodiment of the present application
The network topological diagram (thermometric host integrates monitoring host computer function) of system, as shown in figure 4, wherein master will be used as a thermometric host
Control thermometric host, wherein master control thermometric host is any thermometric host, and the institute of integrated monitoring host is functional.Further
It says, the present invention is not especially limited for the position of monitoring host computer, can be separately provided, also be can integrate in any thermometric master
In machine.
The present invention is a kind of photovoltaic plant fire early-warning system based on temperature sensing optical fiber, on the one hand, optical fiber temperature-measurement precision height,
Reaction is fast, accident point is accurately positioned, and system can reflect the cable of full factory or the temperature of solar panels, real-time capture fire behavior, rapidly
Alarm is issued, has very strong effect for early warning；It on the other hand, can be arbitrarily quilt using the setting of multistage early warning temperature
It surveys region division and at several regions and alarm temperature is respectively set, realize human-based management；In addition, the addition of looped network equipment makes
The system of obtaining can carry out data query on any one computer in netting and data are arranged with interior LAN connection of standing.From
To control room transmission line all using quartz as working media, essence insulation, the interference of anti-electromagnetic microwave are corrosion-resistant, resistance to old at scene
Change, an optical cable can complete detection and signal transmission, and all settings are completed in terminal, without numerous intermediate links and turn
Component is changed, the probability and maintenance cost in the future of failure are greatly reduced.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope disclosed by the invention, any changes or substitutions that can be easily thought of by any those skilled in the art, should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Although disclosed herein embodiment it is as above, the content is only to facilitate understanding the present invention and adopting
Embodiment is not intended to limit the invention.Any those skilled in the art to which this invention pertains are not departing from this
Under the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But scope of patent protection of the invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of fire early-warning system for photovoltaic plant, which is characterized in that the system has:
The a plurality of temperature sensing optical fiber in photovoltaic plant is configured, demarcates all monitorings in this optical fiber using included rice device for mark
Point, output optical fibre scattered signal；
More thermometric hosts, the fibre scattering letter for the temperature sensing optical fiber output that preset time period acquisition in interval is attached thereto
Number, using to temperature effect principle, calculating the monitoring point temperature information of each monitoring point after optical time domain reflection and optical fiber, and
According to preset temperature grade sets of threshold values, the monitoring point temperature grade of each monitoring point is obtained, is exported under all monitoring points
Monitoring point temperature data group, wherein the monitoring point temperature data group includes: the monitoring point temperature under the monitoring point
Information and the monitoring point temperature grade；
Monitoring host computer is connect with more thermometric hosts, is monitored all thermometric hosts, is received and parsed through the thermometric host
The monitoring point temperature data group sent carries out Data Analysis Services to parsing result, exports warning message.
2. early warning system according to claim 1, which is characterized in that
The monitoring host computer is configured to the host equipment being separately provided or integrates the monitoring master for any thermometric host
The host equipment of machine function.
3. early warning system according to claim 1 or 2, which is characterized in that
The monitoring host computer is connect by optical fiber ring network with more thermometric hosts,
The optical fiber ring network has several optical fiber switch and optical fiber, is exchanged adjacent optical fiber by the optical fiber
Machine connection, constitutes a ring local-area network；
Every optical fiber switch is connect with a host equipment, and the host equipment includes the thermometric host or described
Monitoring host computer.
4. early warning system described in any one of claim 1 to 3, which is characterized in that the monitoring point temperature information packet
Include the monitoring location data and monitoring point scene temperature under same monitoring point, the monitoring point include solar panel or
Cable.
5. early warning system according to any one of claims 1 to 4, which is characterized in that further,
The monitoring host computer utilizes the quantity of the thermometric host, and according to the monitoring range of the thermometric host, will be described
The monitoring region of monitoring host computer is divided into several level-ones monitoring region, wherein any level-one monitoring region is corresponding institute
State the monitoring region of thermometric host.
6. early warning system according to any one of claims 1 to 5, which is characterized in that further,
The thermometric host is stored with one group of temperature grade sets of threshold values, the new temperature grade sets of threshold values based on input,
The corresponding data of the machine are updated；
The monitoring host computer, the temperature grade under any corresponding level-one monitoring region of thermometric host setting
Sets of threshold values.
7. early warning system described according to claim 1~any one of 6, which is characterized in that
The temperature grade sets of threshold values includes alarm temperature threshold value corresponding with early warning and at least two grade of fire alarm
And/or alarm temperature rise rate threshold value, further,
The thermometric host, by the monitoring point scene temperature of each monitoring point respectively with same group in multiple alarms
Temperature threshold is compared or by the heating rate of the monitoring point scene temperature of the adjacent same monitoring point measured twice
It is compared with multiple alarm heating rate threshold values, obtains the monitoring temperature grade of the monitoring point.
8. early warning system according to claim 7, which is characterized in that
The monitoring host computer further utilizes the monitoring point temperature information, the monitoring point temperature grade and all described
Level-one monitors the temperature grade sets of threshold values under region, the warning message of all monitoring points of statistics and every sense
The temperature curve of warm optical fiber, wherein the warning message includes: the monitoring point for being respectively at warning grade and fire alarm grade
Quantity, monitoring location and alarm alert signal.
9. early warning system described according to claim 1~any one of 8, which is characterized in that further,
The monitoring host computer has the database for being stored with monitoring point temperature data group；
The thermometric host sends the query context information about the machine to the monitoring host computer, and receives corresponding inquiry model
Enclose the interior monitoring point temperature data group；
The monitoring host computer transfers the institute for meeting query context according to the query context of input from database described in the machine
State monitoring point temperature data group.
10. a kind of fire alarm method for photovoltaic plant, the photovoltaic plant have such as any one of claim 1~9
The fire early-warning system, this method comprises the following steps:
Temperature information acquisition step: temperature sensing optical fiber demarcates all monitoring points in this optical fiber, output optical fibre scattered signal, thermometric
Host interval preset time period acquires the fibre scattering signal connecting with the thermometric host, utilizes optical time domain reflection and light
Fine backward temperature effect principle, calculates the monitoring point temperature information of each monitoring point, the monitoring point temperature information includes
Monitoring location data and monitoring point scene temperature under same monitoring point, further, the monitoring point includes solar-electricity
Pond plate or cable；
Temperature grade determination step: the thermometric host utilizes the monitoring point temperature according to preset temperature grade sets of threshold values
Information obtains the monitoring point temperature grade of each monitoring point, exports the monitoring point temperature data group under all monitoring points,
In, the monitoring point temperature data group includes: the monitoring point temperature information and the monitoring point temperature under the monitoring point
Grade；
Warning message exports step: the monitoring host computer receives and parses through the monitoring point temperature that all thermometric hosts are sent
Data group is spent, Data Analysis Services are carried out to parsing result, export warning message.
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