CN111870843A - Wireless fire fighting system for energy storage station and control method thereof - Google Patents

Wireless fire fighting system for energy storage station and control method thereof Download PDF

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Publication number
CN111870843A
CN111870843A CN202010755916.3A CN202010755916A CN111870843A CN 111870843 A CN111870843 A CN 111870843A CN 202010755916 A CN202010755916 A CN 202010755916A CN 111870843 A CN111870843 A CN 111870843A
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CN
China
Prior art keywords
wireless
fire
energy storage
storage station
detector
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Pending
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CN202010755916.3A
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Chinese (zh)
Inventor
施挺
赵雷
宋湘萍
肖杨
晏贵平
冯开锋
牟长玖
张�杰
姬生飞
鲁新意
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NR Electric Co Ltd
NR Engineering Co Ltd
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NR Electric Co Ltd
NR Engineering Co Ltd
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Application filed by NR Electric Co Ltd, NR Engineering Co Ltd filed Critical NR Electric Co Ltd
Priority to CN202010755916.3A priority Critical patent/CN111870843A/en
Publication of CN111870843A publication Critical patent/CN111870843A/en
Pending legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C3/00Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/16Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C31/00Delivery of fire-extinguishing material
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C31/00Delivery of fire-extinguishing material
    • A62C31/005Delivery of fire-extinguishing material using nozzles
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C37/00Control of fire-fighting equipment
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C37/00Control of fire-fighting equipment
    • A62C37/36Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00Fire alarms; Alarms responsive to explosion

Abstract

The application discloses a fire fighting system based on wireless technology for an energy storage station, which consists of all or part of equipment such as a wireless fire alarm controller, a wireless fire detector, a wireless manual fire alarm button, a wireless fire acousto-optic alarm, a wireless module, a wireless repeater and the like, wherein the LoRa wireless communication function of the system is realized by being compounded in each component in the system; based on the fire characteristics of the lithium battery, an online early warning decision system, a multi-combination high-sensitivity detection system, a full-flooding automatic fire extinguishing system, a long-time protection cooling system, a manual backup means and other all-around, multi-angle and comprehensive control schemes are adopted. The fire extinguishing system has the functions of real-time fire detection and automatic fire extinguishing of the energy storage station.

Description

Wireless fire fighting system for energy storage station and control method thereof
Technical Field
The application belongs to the field of power system fire protection, and mainly relates to a wireless fire protection system for an energy storage station and a control method of the wireless fire protection system.
Background
The battery energy storage system is composed of a battery pack, a battery management system BMS, an energy storage converter PCS, an air conditioner, a movable ring monitor, a frame and accessories. Except for the possible electrical safety of the energy storage converter PCS, the air conditioner, the moving loop monitoring and the like, the battery pack becomes the largest potential safety hazard point. The potential safety hazard characteristics in the energy storage system are as follows:
1) in a battery energy storage system, the battery capacity of a battery pack is often as high as MWH, and the energy density is extremely high in a container or a local space; in a local area, the capacity is as high as tens to hundreds of MWH. Once a safety problem occurs, a chain reaction of battery combustion is often caused, so that the situation is out of control and the loss is great.
2) In a battery energy storage system, the voltage of a battery pack is generally above 700V, and a high-voltage direct-current system puts extremely high requirements on system insulation and protection; the system has complicated wiring and structure, and once the cable is aged, air is moist, dust and the like can cause insulation reduction, so that electric leakage and ignition are caused, the contact resistance of the cable is increased, heat is generated and the like, and safety accidents are caused.
3) In a battery energy storage system on the side of a power grid, a complex system often generates a severe electromagnetic environment, which causes false alarm and false operation of the system, and unpredictable safety accidents are generated.
4) The battery overcharge, overdischarge, overcurrent, overtemperature, short circuit, thermal runaway and the like are the biggest potential safety hazards of the energy storage system.
The current situation of a fire alarm system of an energy storage station is as follows:
the method is lack of top-level design, low in standardization degree, mostly customized design and demonstration application, and lack of long-time running verification.
The integration design lacks the consideration of a system, and becomes the accumulation of a plurality of functional components, which lack the connection among each other and are mostly information isolated islands;
the operation method and the protection mechanism are imperfect, and a redundant safety protection and long-life management method is lacked;
the heat management and consistency management are rough, the comprehensive analysis and diagnosis of an energy storage system and a battery system are lacked, and the operation and maintenance support of the energy storage system is lacked;
the solution of system safety is lacked, and the design idea of building fire fighting is only directly used, so that the system is not suitable for fire fighting treatment of an energy storage system;
the energy storage system has high cost, low reliability, complex maintenance or difficult maintenance, high maintenance requirement and high requirement on operation and maintenance managers.
The existing fire alarm system still adopts an industrial bus in a communication mode through signal acquisition and control of fire extinguishing equipment by a module based on an industrial control platform, so that the transmission efficiency is low, and the field wiring is complex.
Disclosure of Invention
In view of the above-mentioned drawbacks of the background art, the present application aims to provide a wireless fire fighting system for an energy storage station, which has functions of detecting a fire in the energy storage station in real time and automatically extinguishing the fire.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
the invention provides a wireless fire fighting system for an energy storage station, which comprises:
the wireless detector covers the whole energy storage station and is used for acquiring the environmental information of the energy storage station in real time;
the wireless repeater is used for receiving the environmental information collected by the wireless detector;
the wireless acousto-optic alarm is used for sending out an alarm signal;
the automatic fire extinguishing system comprises a gas fire extinguishing device and a high-pressure water mist system, wherein the gas fire extinguishing device adopts heptafluoropropane as a fire extinguishing agent, and the high-pressure water mist system comprises a plurality of high-pressure water mist nozzles;
the wireless controller is used for receiving the environmental information transmitted by the wireless repeater, monitoring the fire condition of the whole energy storage station and starting the automatic fire extinguishing system;
and the online early warning decision-making system is used for monitoring the running state of the battery, giving out early warning signals and making fire extinguishing schemes according to different fire conditions.
Further, the energy storage station also comprises an outdoor fire hydrant system arranged outside the energy storage station.
Further, the wireless probe includes: the device comprises a wireless combustible gas detector, a wireless smoke detector and a wireless temperature-sensing detector.
Further, a manual alarm is also included.
Further, a control method for a wireless fire fighting system of a power storage station includes:
detecting fire alarm information existing in the whole energy storage station in real time through a wireless detector covering the energy storage station;
the wireless detector transmits the fire alarm area and the alarm information to the wireless controller through the wireless repeater, and triggers the wireless sound-light alarm and the automatic fire extinguishing system;
the wireless controller analyzes and processes the conditions of the detector nodes in different areas and completely monitors the fire alarm of the whole energy storage station;
the online early warning decision-making system monitors the running state of the battery, evaluates the risk level of the safety state of the battery, sends out early warning signals when the temperature of the battery is overhigh, and makes fire extinguishing schemes aiming at different fires;
when the energy storage station is on fire electrically, the gas fire extinguishing device is used for extinguishing the fire, and the high-pressure water mist system is used for spraying water mist to cool;
when the battery of the energy storage station is on fire, water mist is sprayed by the high-pressure water mist system to extinguish the fire.
Further, the automatic fire extinguishing system needs to be started up to meet one of the following 4 conditions:
the detection concentration of any two combustible gas detectors reaches 40% LEL;
any combustible gas detector detects that the concentration reaches 20% LEL and the smoke detector acts simultaneously;
any combustible gas detector detects LEL with the concentration reaching 20 percent and the temperature-sensitive detector acts simultaneously;
any combustible gas detector detects that the concentration reaches 20% LEL and the manual alarm button acts simultaneously.
The invention has the beneficial effects that:
1. the fire alarm system based on the LoRa wireless standard is adopted, the smoke sensing, temperature sensing, manual alarming and fire alarm detectors are wirelessly connected, the fire alarm system has long-distance wireless communication capacity, overcomes the defects that the traditional equipment cannot be networked and is troublesome in networking and wiring, has a comprehensive equipment state self-monitoring function, has alarm functions of preventing disassembly, low electric quantity, faults, offline and the like, supports remote detection and configuration of equipment parameters, and saves cables and construction cost;
2. the functions of real-time detection of the fire of the energy storage station and automatic extinguishing of the fire are realized by arranging a wireless detector and an automatic fire extinguishing system;
3. by arranging the online early warning decision system and optimizing the system operation control method, the safety control of the system is realized, strict time sequence control and safety redundancy setting are realized, and the safety control can still be executed when part of the system fails.
Drawings
Fig. 1 is a diagram of a wireless fire protection system network architecture.
FIG. 2 is a diagram of the arrangement of high pressure water mist nozzles in the energy storage tank.
FIG. 3 is a flow chart of the operation of the high pressure water mist system.
Detailed Description
The following detailed description of the present application, taken in conjunction with the accompanying drawings and examples, is provided to enable the aspects and advantages of the present application to be better understood. However, the specific embodiments and examples described below are for illustrative purposes only and are not limiting of the present application.
As shown in fig. 1, this embodiment configures 1 set of centralized linkage type fire fighting system based on LoRa wireless communication technology, including:
the wireless detector covers the whole energy storage station and is used for acquiring the environmental information of the energy storage station in real time;
the wireless repeater is used for receiving the environmental information collected by the wireless detector;
the wireless acousto-optic alarm is used for sending out an alarm signal;
the automatic fire extinguishing system comprises a gas fire extinguishing device and a high-pressure water mist system, wherein the gas fire extinguishing device adopts heptafluoropropane as a fire extinguishing agent, and the high-pressure water mist system comprises a plurality of high-pressure water mist nozzles;
the wireless controller is used for receiving the environmental information transmitted by the wireless repeater, monitoring the fire condition of the whole energy storage station and starting the automatic fire extinguishing system;
and the online early warning decision-making system is used for monitoring the running state of the battery, giving out early warning signals and making fire extinguishing schemes according to different fire conditions.
The LoRa wireless communication function of the system is implemented in a complex of components within the system.
The LoRa wireless communication system of this embodiment is based on distributed control system architecture, can survey the fire alarm information in the energy storage station in real time, according to the structure and the scale of energy storage station during the use, arrange suitable wireless detector and wireless reputation siren of figure in advance in its inside different regions, wireless detector gathers the environmental information of its monitoring area in real time and does corresponding judgement processing, send the alarm information or the operational aspect of its region to wireless controller through wireless repeater in real time, wireless controller carries out analysis processes through the wireless detector node situation of different regions inside, realize carrying out complete monitoring to the fire alarm and the operational aspect of whole energy storage station, send out evacuation alarm sound through fire detector and reputation siren when the conflagration breaks out according to predetermined evacuation method, remind personnel in the building to rescue and flee.
This embodiment adopts fire alarm system based on loRa wireless standard, with smoke detector, temperature sensing, hand newspaper, fire alarm detector adoption wireless access, possesses remote wireless communication ability, overcomes the unable networking of traditional equipment, the trouble shortcoming of networking wiring, possesses comprehensive equipment status from monitoring function, has alarm function such as prevent tearing open, low-power, trouble, off-line, supports remote detection and configuration equipment parameter, saves cable and construction cost.
Fire control automation system and fire alarm system based on loRa wireless technology are established to this embodiment, comprehensive perception fire-fighting equipment running state can realize under the not many circumstances of expense increase, promotes fire control safety level by a wide margin.
Every container is a fire control region in this embodiment container formula lithium cell energy storage system. A certain number of wireless point type fire detectors are arranged in each container, and on the basis, wireless combustible gas detectors are added, so that early warning can be realized, and warning signals in the area can be uniformly sent to a fire control center of an energy storage station.
According to the embodiment, the number of the wireless audible and visual alarms is increased by increasing the alarm signal acquisition and considering the processing mode of the acquired signals, the wireless audible and visual alarms are arranged in places where people often patrol and guard, and the alarm signals in the area are sent to a fire control center.
The present embodiment provides a gas fire extinguishing apparatus using non-conductive heptafluoropropane as a fire extinguishing agent, and the amount of the heptafluoropropane fire extinguishing agent is set according to the inerting design concentration. The automatic fire extinguishing system has the functions of automatic operation, automatic monitoring and automatic fire extinguishing. The spraying duration of the heptafluoropropane fire extinguishing agent is 10s, and the battery container is kept in a 10-min sealing state after the spraying is finished, so that the fire extinguishing agent is fully diffused and extinguishes.
In the embodiment, when the gas fire extinguishing device and the high-pressure water mist system in the lithium battery container cannot extinguish the fire in the container, a large amount of water is continuously sprayed, so that the method is the most effective fire extinguishing method for the lithium battery. An outdoor fire hydrant system is arranged around lithium battery container equipment, a common fire-fighting water supply facility of a transformer substation is utilized, when the total amount of fire-fighting water is ensured to reach the maximum by the water supply pressure, a water column filled by a water gun is not less than 13 m, and the water column can reach all parts in the box when the safe position at the end part of an outer container is ensured to spray water for fire extinguishing.
This embodiment adopts online early warning decision-making system to formulate the scheme of putting out a fire to the condition of a fire based on the conflagration characteristic analysis of lithium cell:
1) the battery storage is installed in an environment with an automatic fire suppression system. An air conditioning and ventilating device is arranged in the energy storage box, so that the temperature of the energy storage box is kept not to exceed the standard requirement for a long time, and the battery is prevented from overheating and spontaneous combustion. And a sensitive temperature sensing element is arranged in the box body, and the battery BMS is combined with a temperature sensing system of the battery BMS, so that the alarm can be given in time and the processing can be carried out as early as possible when the temperature in the battery and the box body is overheated.
2) The fire detection system comprises a wireless combustible gas detector, a wireless smoke detector and a wireless temperature detector, the electric quantity auxiliary criterion is added, the fire detection system is linked with a gas fire extinguishing device and a high-pressure water mist fire extinguishing system, a fire source is found as soon as possible, and a fire disaster is extinguished in time.
3) Aiming at different characteristics of electrical fire and battery fire in the energy storage box, different fire extinguishing systems are adopted for linkage in stages.
4) The gas fire extinguishing device is adopted to quickly extinguish fire for electrical fire, the high-pressure water mist system sprays water mist for long-time cooling, the initial reliable fire extinguishing is guaranteed, and the battery is not overheated to catch fire.
5) Aiming at the fire of the battery, a long-time high-pressure water mist system is directly adopted to spray water mist, so that the fire can be reliably extinguished, the battery pack is cooled, and the re-combustion is prevented.
6) And (3) long-time protection and cooling: the best method for extinguishing the fire of the lithium ion battery is to cool the burning material, and aiming at the characteristic that the lithium battery is easy to reburn, the high-pressure water mist system is provided with 1 set of water mist pump set, so that water is continuously sprayed for a long time, the temperature of the battery is continuously reduced, and the reburning is prevented.
The online early warning decision system of the embodiment realizes the following functions.
1) The method for optimizing the system operation control realizes the safety control of the system, has strict time sequence control and safety redundancy setting, and can ensure that the safety control can be still executed when partial systems fail.
2) The battery system early warning mechanism is provided, system early warning is carried out based on the health state, consistency state (voltage and temperature) and temperature change state of the battery, early warning is given to the battery system which runs with diseases, and operation and maintenance are facilitated.
3) And the battery safety state analysis SOS system is used for accurately evaluating the battery safety state and giving a safety risk level value. Through the early warning to SOS, avoid battery work in high-risk area, the emergence of prevention incident.
4) Based on H2, CO and other gas detection, battery monomer temperature, smoke, temperature, video and other comprehensive fire detection systems, the safety early warning and fire control linkage control of the battery system are executed.
The fire detection system comprises a wireless combustible gas detector, a wireless smoke detector and a wireless temperature detector, and is additionally provided with an electric quantity auxiliary criterion which is linked with a gas and water mist fire extinguishing system to discover a fire source as soon as possible and extinguish a fire in time.
Each energy storage battery box of the embodiment is an independent alarm and detection area. Each protection area is provided with 2 wireless smoke detectors, 2 wireless temperature detectors and 3 wireless combustible gas detectors, and the three detectors are alternately arranged.
In each battery compartment of the energy storage station, an audible and visual alarm and a manual automatic status lamp are arranged on the inner side of an access door, and a manual alarm, a gas start-stop button, an audible and visual alarm and a release indicator lamp are arranged on the outer side of the access door; the equipment is all installed at the access door end.
The application of wireless conflagration fire extinguishing system and Battery Management System (BMS) coordinated control, the conflagration type divide into initial stage, electric fire and battery conflagration: aiming at different types, sequentially opening ventilation, opening corresponding regional control valves and main pumps, spraying water mist, starting heptafluoropropane to extinguish fire, and automatically controlling the electric shutter to close; cutting off the air conditioner and the fan power supply in the fire area; cutting off the illumination of the common light and turning on the emergency illumination; the PCS breaker is switched off. If the mistaking is judged through the video, the remote pump stopping button can be pressed down through authorization, and the fine mist spraying is stopped.
1) The linkage method only adopts combustible gas but does not adopt fire:
when the storage battery of the energy storage system runs for a long time in the charging and discharging process and electrolyzed water can generate trace hydrogen, and when any wireless combustible gas detector in the battery box acts at a low threshold value and does not sense smoke or act at a temperature-sensing detector, the ventilation fan is started, the power supply of the air conditioner is cut off, and the cabin-level contactor is tripped. Combustible gas in the battery box is rapidly discharged out of the box body, and the battery temperature and the gas concentration in the battery box are monitored by combining the video linkage of the related cameras and the BMS. When the concentration of the combustible gas and the temperature of the battery are recovered to be normal, the fan is closed, the air conditioner is closed, and the contactor is closed, so that the temperature in the box body and the micro-positive pressure system are normal.
The automatic start should satisfy the following conditions:
when the concentration of the combustible gas reaches a first threshold value, any 1 wireless combustible gas detector acts.
After the fire alarm is automatically started, the following equipment is linked through a wireless controller:
the fire control room is informed to the operator on duty through multimedia alarms such as sound, light, voice, short messages, telephone and the like; pushing corresponding alarm site video and fire alarm information to monitoring personnel in real time;
automatically cutting off an air conditioner in a fire area and starting an accident ventilation fan;
automatically switching off a contactor of the cabin-level battery pack;
the related cameras are linked through videos, and the battery temperature and the gas concentration in the BMS monitoring box are combined;
when the concentration of the combustible gas and the temperature of the battery are recovered to be normal, the fan is closed, the air conditioner is closed, and the contactor is closed, so that the temperature in the box body and the micro-positive pressure system are normal.
2) When an electrical fire occurs, the gas fire extinguishing device and the high-pressure water mist system are automatically started;
because the temperature of the battery box is too high due to the electric fire, the battery needs to be cooled for a long time after the open fire is extinguished.
a) Automatic start logic of the gas fire extinguishing device:
the self-start should satisfy one of the following 2 conditions:
there are 2 or more independent wireless detectors (smoke or temperature) that signal simultaneously.
Or a wireless detector (smoke or temperature) and a hand-operated alarm.
After the fire alarm is automatically started, the following equipment is linked through a wireless controller:
the fire control room is informed to the operator on duty through multimedia alarms such as sound, light, voice, short messages, telephone and the like; automatically starting 119 fire alarm linkage; pushing corresponding alarm site video and fire alarm information to monitoring personnel in real time;
after the monitoring personnel confirm that fire occurs on the site, the monitoring personnel pass identity authentication and start a manual alarm button; sending a fire alarm confirmation signal to the integrated monitoring system;
the opening of the pressure relief opening is automatically controlled; automatically controlling the closing of a related access control system, and cutting off the air conditioner and the fan power supply in the fire area; cutting off the illumination of the common light and turning on the emergency illumination; the PCS breaker is switched off. When the cabin-level PCS circuit breaker refuses to jump, the fire disaster is judged through the manual remote video of the monitoring center, and the wireless fire fighting system is started for fire fighting through the fire fighting monitoring background for remote emergency.
The camera in the area is linked through communication with the auxiliary control server, and the picture is sent to a fire control room, so that the whole fire occurrence process is monitored in real time.
The gas spraying time of the gas fire extinguishing device is 10s, and the water mist spraying time of the high-pressure water mist system is 10 min. And starting the engine for 0s when no person exists, and starting the engine for 30s when the person exists in a time delay manner.
b) The high-pressure water mist system self-starting logic:
the self-starting condition should satisfy one of the following 2 conditions:
there are 2 or more independent wireless detectors (smoke or temperature) that signal simultaneously.
Or a wireless detector (smoke or temperature) and a manual alarm send out alarm signals.
After the action of the gas fire extinguishing device is judged by the wireless controller, the high-pressure water mist system is started after 10 minutes of delay.
The high-pressure water mist system sprays water mist for 30 minutes. And after the fire suppression and the temperature reduction of the battery are confirmed through video and monitoring, the water mist pump set of the high-pressure water mist system is disconnected.
3) The method is used for automatically starting the high-pressure water mist system when a battery fire disaster happens.
The fire caused by the battery in the energy storage system is large in harm and uncontrollable once the fire is started, the water mist automatic fire extinguishing mode is mainly used for the fire, the water mist spraying time is as long as 1 hour, and the battery can be effectively prevented from reburning.
The automatic start of the high-pressure water mist system meets one of the following 4 conditions:
the detection concentration of any two wireless combustible gas detectors reaches 40% LEL;
any wireless combustible gas detector detects that the concentration reaches 20% LEL and the wireless smoke detector acts simultaneously;
any wireless combustible gas detector detects LEL with the concentration reaching 20 percent and the wireless temperature-sensing detector acts simultaneously;
any wireless combustible gas detector detects that the concentration reaches 20% LEL and the manual alarm button acts simultaneously.
As shown in fig. 2, the high-pressure water mist system comprises a high-pressure water mist pump set, a high-pressure water mist nozzle, a zone control valve set, a stainless steel pipeline, a fire alarm system and the like; all protection areas adopt open type spray heads, the installation space of the spray heads is not more than 3.0m, not less than 1.5m and not more than 1.5m away from the wall. In order to ensure the cooling effect of the batteries, the spray heads adopt the design of total flooding and total coverage, 4 spray heads are arranged on the top of the energy storage battery box, and 3 spray heads are arranged on the side surface of each group of battery racks.
The high-pressure water mist system is characterized in that a regional control valve is opened by a wireless controller, the pressure of a system pipeline is reduced, a pressure stabilizing pump is started, when the pressure of the pressure stabilizing pump still does not reach the set 1.2MPa after the pressure stabilizing pump operates for 10s, a main pump is started and stops operating, the main pump supplies water to an open type spray head, and water mist is sprayed to extinguish fire.
As shown in figure 3, the high-pressure water mist system adopts three control modes of automatic control, manual control and emergency operation.
Automatic control: after the wireless detector (fire detector) in the relevant area sends out a signal, the wireless controller (fire alarm control system) starts the alarm bell and the audible and visual alarm in a linkage manner, opens the corresponding fire-extinguishing subarea control valve and supplies water to the water distribution pipe. When the pressure of the main pipeline is reduced and the pressure of the pressure stabilizing pump still cannot meet the requirement after the pressure stabilizing pump operates for more than 10 seconds, the main pump is started, and the pressure water is sprayed to extinguish fire through the high-pressure water mist spray nozzle. The pressure switch feedback system sends out a spraying signal, and the wireless controller (fire alarm control system) starts the spraying indicator lamp in a linkage manner.
Manual control: a wireless detector (fire detector) starts a video camera of a corresponding area, when a person on duty in a fire control remote place or a field person confirms a fire and automatic control does not act, a multi-line control panel of the fire control can be pressed to be started in a manual control mode, or a manual starting button of a field person on a control valve of the field area is used for starting a system to spray and discharge water mist to extinguish the fire.
Mechanical emergency operation: when the automatic control and the manual control fail, the control valve is opened by operating the handle of the area control valve, the system is started, and the water mist is sprayed for extinguishing fire.
The control scheme of the gas fire extinguishing device of the embodiment is as follows:
the gas fire extinguishing device adopts two starting modes of automatic control and manual control. And a controller for manually and automatically controlling the state is arranged at the door of the energy storage box and is used for displaying and switching between manual and automatic modes.
When the automatic control starting mode is adopted, the injection without delay is set. When a manual control mode is adopted, controllable delay spraying of not more than 30s is needed according to the requirement of personnel evacuation from a protection area;
when the maintainer enters the protection area, the gas fire extinguishing device is converted into a manual control mode; when the person leaves, the automatic control mode is recovered.
The energy storage container of the embodiment evacuates and gives an alarm:
emergency lighting and evacuation indication signs are required to be arranged at evacuation channels and outlets in the protective area. A fire sound alarm and a flash alarm are arranged in the protection area.
The entrance of the protection area is provided with a fire sound and light alarm, a fire extinguishing agent spraying indicator light and a permanent signboard of a corresponding gas fire extinguishing system adopted by the protection area.
The signal of the fire extinguishing agent discharge indicator lamp is kept until the protection area is ventilated and ventilated, and the fire extinguishing agent discharge indicator lamp is manually released. All the energy storage box doors are opened towards the evacuation direction and can be closed automatically.
The energy storage container of this embodiment ventilates:
a mechanical air exhaust device is arranged in each container.
When any wireless combustible gas detector in the battery box acts at a low threshold value and no smoke or temperature sensing detector acts, the ventilation fan is started, the power supply of the air conditioner is cut off, the combustible gas in the battery box is rapidly discharged out of the box body, and the battery temperature and the gas concentration in the battery box are monitored by combining the BMS through the video linkage related camera. When the concentration of the combustible gas and the temperature of the battery are recovered to be normal, the fan is closed, the air conditioner is closed, and the temperature in the box body and the micro-positive pressure system are guaranteed to be normal.
After fire is extinguished, all air exhaust equipment in the container is started to ventilate, and an air exhaust port is arranged at the lower part of the container room and is directly communicated with the outside.
Because the energy storage container is provided with the gas fire extinguishing device, the axial flow fan is arranged indoors, the exhaust is started after a disaster, and the exhaust frequency after the disaster is not lower than 5 times/h.
All indoor fans and air conditioners are linked with a fire alarm system, and all indoor fans and air conditioners are turned off in case of fire. After the disaster, all indoor air exhaust facilities are started to discharge smoke after the disaster.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (6)

1. A wireless fire protection system for a power storage station, comprising:
the wireless detector covers the whole energy storage station and is used for acquiring the environmental information of the energy storage station in real time;
the wireless repeater is used for receiving the environmental information collected by the wireless detector;
the wireless acousto-optic alarm is used for sending out an alarm signal;
the automatic fire extinguishing system comprises a gas fire extinguishing device and a high-pressure water mist system, wherein the gas fire extinguishing device adopts heptafluoropropane as a fire extinguishing agent, and the high-pressure water mist system comprises a plurality of high-pressure water mist nozzles;
the wireless controller is used for receiving the environmental information transmitted by the wireless repeater, monitoring the fire condition of the whole energy storage station and starting the automatic fire extinguishing system;
and the online early warning decision-making system is used for monitoring the running state of the battery, giving out early warning signals and making fire extinguishing schemes according to different fire conditions.
2. A wireless fire fighting system for a power storage station as defined in claim 1, further comprising an outdoor hydrant system disposed outside the power storage station.
3. A wireless fire fighting system for a power storage station as defined in claim 1, wherein the wireless detector comprises: the device comprises a wireless combustible gas detector, a wireless smoke detector and a wireless temperature-sensing detector.
4. A wireless fire protection system for a power storage station as defined in claim 1, further comprising a manual alarm.
5. The control method of the wireless fire fighting system for the energy storage station according to any one of claims 1 to 4, comprising:
detecting fire alarm information existing in the whole energy storage station in real time through a wireless detector covering the energy storage station;
the wireless detector transmits the fire alarm area and the alarm information to the wireless controller through the wireless repeater, and triggers the wireless sound-light alarm and the automatic fire extinguishing system;
the wireless controller analyzes and processes the conditions of the detector nodes in different areas, and completely monitors the fire alarm and the working condition of the whole energy storage station;
the online early warning decision-making system monitors the running state of the battery, evaluates the risk level of the safety state of the battery, sends out early warning signals when the temperature of the battery is overhigh, and makes fire extinguishing schemes aiming at different fires;
when the energy storage station is on fire electrically, the gas fire extinguishing device is used for extinguishing the fire, and the high-pressure water mist system is used for spraying water mist to cool;
when the battery of the energy storage station is on fire, water mist is sprayed by the high-pressure water mist system to extinguish the fire.
6. The control method of the wireless fire fighting system for the energy storage station according to claim 5, wherein the high-pressure water mist system is started up under one of the following 4 conditions:
the detection concentration of any two wireless combustible gas detectors reaches 40% LEL;
any wireless combustible gas detector detects that the concentration reaches 20% LEL and the wireless smoke detector acts simultaneously;
any wireless combustible gas detector detects LEL with the concentration reaching 20 percent and the wireless temperature-sensing detector acts simultaneously;
any wireless combustible gas detector detects that the concentration reaches 20% LEL and the manual alarm button acts simultaneously.
CN202010755916.3A 2020-07-31 2020-07-31 Wireless fire fighting system for energy storage station and control method thereof Pending CN111870843A (en)

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Application publication date: 20201103