CN111834110A - Ultrahigh-voltage converter emergency oil discharge and fire-fighting medium injection device, method and system - Google Patents
Ultrahigh-voltage converter emergency oil discharge and fire-fighting medium injection device, method and system Download PDFInfo
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- 238000002347 injection Methods 0.000 title claims abstract description 30
- 239000007924 injection Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 29
- 238000004891 communication Methods 0.000 claims description 18
- 238000000926 separation method Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims 4
- 238000002485 combustion reaction Methods 0.000 abstract description 7
- 239000011810 insulating material Substances 0.000 abstract description 6
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 238000007599 discharging Methods 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/18—Arrangements for supervising or controlling working operations for measuring the quantity of conveyed product
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Water Supply & Treatment (AREA)
- Housings And Mounting Of Transformers (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The invention discloses an extra-high voltage converter transformer emergency oil discharge and fire-fighting medium injection device, method and system, wherein a control valve and a flowmeter are respectively arranged on oil discharge pipelines of a body and an oil conservator, so that the oil discharge speed of the two pipelines can be independently controlled; simultaneously, cavities are prevented from being formed in the body and the oil storage cabinet, high-heat oil gas and insulating materials in the body and the oil storage cabinet are cooled, the potential safety hazard of re-combustion is reduced, safety guarantee and rescue favorable conditions are provided for rescuers, and the fire-fighting capacity of the converter transformer is improved.
Description
Technical Field
The invention relates to the technical field of fire protection of an extra-high voltage converter station, in particular to an extra-high voltage converter emergency oil discharge and fire protection medium injection device, method and system.
Background
In recent years, with the continuous improvement of the voltage grade of the high-voltage direct-current transmission, the number and the capacity of electric equipment in a direct-current converter station are increased, and the fire protection risk is increased. The converter transformer is core primary equipment of a converter station, a large amount of insulating oil is contained in the converter transformer, the fire risk is extremely high, the weight of single-phase oil of a 1100kV low-end converter transformer reaches about 166 tons, the weight of single-phase oil of a 1100kV high-end converter transformer reaches about 285 tons, the flash point of the used insulating oil is 135-150 ℃, the ignition point is 165-195 ℃, the self-ignition point is about 32 ℃, the oil can generally and quickly enter a comprehensive development stage after a fire occurs, the damage to adjacent equipment is great, and even a large-area power failure accident can be caused.
In a common voltage class transformer substation, a 220kv transformer extinguishes the transformer by installing an oil discharging and nitrogen injecting device, so that a fixed extinguishing system is not separately arranged around the transformer. The working principle of the oil discharging and nitrogen injecting device is that when a low-voltage transformer catches fire, oil reaching the combustion temperature is only limited to upper surface oil. Compressed nitrogen with stable chemical properties is injected from the bottom of the transformer to stir oil in the tank body from bottom to top, so that the circulation of the oil in the oil tank is accelerated. This allows the oil on the upper surface, which has reached combustion temperature, to be cooled by a significant amount of the oil on the lower part, which lowers the temperature of the oil below its flash point to slow combustion. Although this oil extraction nitrogen injection device can slow down the burning to a certain extent, the malfunction rate is high, at extra-high voltage converter station, if because the oil extraction nitrogen injection malfunction tripping operation, can cause very serious consequence, and when extra-high voltage converter transformer oil mass is big, it is long to fill nitrogen stirring time at the converter transformer bottom, and the cooling effect is not obvious.
In the field of extra-high voltage, when a converter transformer generates a fire, an oil discharge mode is often adopted for flame retardance in order to avoid fire spreading. The high-temperature flame-retardant combined valve control system for the accident oil drainage pipeline of the extra-high voltage transformer disclosed as 201810646985.3 is used for blocking an oil drainage pipe at a low oil level by arranging a pipeline comprehensive control mechanism and a one-way valve, and preventing fire from spreading to an oil pit by opening the pipeline at a high oil level for oil drainage. However, after the ultrahigh voltage converter transformer discharges high-temperature oil, high-temperature oil gas and insulating materials are still arranged in the oil tank, after the high-temperature oil gas and the insulating materials contact air, re-combustion is likely to occur, and very large potential safety hazards still exist.
Disclosure of Invention
The invention aims to solve the technical problem of how to improve the oil discharge, temperature reduction and flame retardance combined control effect of the extra-high voltage converter transformer.
The invention solves the technical problems through the following technical means:
an ultrahigh-voltage converter transformer emergency oil discharge and fire-fighting medium injection device comprises a converter transformer body (1) and an oil storage cabinet (2), wherein an oil outlet of the oil storage cabinet (2) is communicated with an oil inlet of the body (1); the device comprises
An oil pit (17) located below the converter transformer;
an oil discharge pipeline of the body (1) is connected with an oil outlet of the body (1) and an oil inlet of the oil pit (17) at two ends respectively;
an oil discharge pipeline of the oil storage cabinet (2) is connected with the two ends of the oil discharge pipeline respectively, and the two ends of the oil discharge pipeline are connected with an oil outlet of the oil storage cabinet (2) and an oil inlet of the oil pit (17);
the two ends of the fire-fighting medium pipeline of the body are respectively connected with the outlet of the medium generating equipment (28) and the medium inlet of the body (1);
the fire-fighting medium pipeline of the oil conservator (2) is connected with the outlet of the medium generating equipment (28) and the medium inlet of the oil conservator (2) at two ends respectively;
an oil inlet of the accident oil pool (20) is communicated with an oil outlet of the oil pit (17);
a connecting pipeline between the oil conservator (2) and the body is sequentially provided with a separating electromagnetic valve (3) and a gas relay (4) according to the flow direction of oil;
the oil discharge pipeline of the body (1) is sequentially provided with a body oil discharge control valve (11), a body oil discharge flowmeter (12) and a body oil-submersible pump (13) according to the flow direction of oil; an oil discharge pipeline of the oil conservator (2) is sequentially provided with an oil conservator oil discharge control valve (14), an oil conservator oil discharge flowmeter (15) and an oil conservator submersible pump (16) according to the flow direction of oil; the fire-fighting medium pipeline of the body is sequentially provided with a body medium control valve (21), a body medium flowmeter (22) and a body medium check valve (23) according to the medium flow direction; the fire-fighting medium pipeline of the oil conservator (2) is sequentially provided with an oil conservator medium control valve (24), an oil conservator medium flowmeter (25) and an oil conservator medium check valve (26) according to the medium flow direction; the inlet ends of the fire-fighting medium pipeline of the body and the fire-fighting medium pipeline of the oil storage cabinet (2) are connected with the outlet of the medium generating equipment (28) through a supercharger (27);
an oil discharge outlet check valve (18) and an oil discharge outlet flowmeter (19) are sequentially arranged on a pipeline between the oil pit (17) and the accident oil pool (20) according to the oil flow direction;
the central control room (6) is used for receiving a fire alarm signal; the gas relay (4) and the main controller (5) are respectively in communication connection with the central control room (6);
the main controller (5) is in communication connection with the body oil discharge control valve (11), the body oil discharge flow meter (12), the body oil-submersible pump (13), the oil storage cabinet oil discharge control valve (14), the oil storage cabinet oil discharge flow meter (15), the oil storage cabinet oil-submersible pump (16), the body medium control valve (21), the body medium flow meter (22), the oil storage cabinet medium control valve (24), the oil storage cabinet medium flow meter (25), the supercharger (27), the separation electromagnetic valve (3) and the oil discharge outlet flow meter (19).
The control valves and the flow meters are respectively arranged on the oil discharge pipelines of the body and the oil conservator, so that the independent control of the oil discharge speed of the two pipelines can be realized, similarly, the fire-fighting medium injection speeds of the body and the oil conservator can also be independently controlled, the matching of the oil discharge quantity and the medium injection quantity is realized, the vacancy after the oil level is reduced is timely filled, the fire disaster is inhibited from entering the converter transformer body, and the fire disaster scale expansion risk is reduced; simultaneously, cavities are prevented from being formed in the body and the oil storage cabinet, high-heat oil gas and insulating materials in the body and the oil storage cabinet are cooled, the potential safety hazard of re-combustion is reduced, safety guarantee and rescue favorable conditions are provided for rescuers, and the fire-fighting capacity of the converter transformer is improved.
Further, an oil outlet of the body (1) is positioned at the bottom of the body (1), and a medium inlet is positioned at the top of the body (1); the oil outlet of the oil storage cabinet (2) is positioned at the bottom of the oil storage cabinet (2), and the medium inlet is positioned at the top of the oil storage cabinet (2).
Furthermore, the body (1), the oil storage cabinet (2), the accident oil pool (20) and the medium generating equipment (28) are respectively provided with a liquid level meter; the 4 liquid level meters are in communication connection with the main controller (5).
The invention also provides a control method based on the device, which comprises the following steps:
the background server of the central control room (6) receives the heavy gas signal, the fire alarm signal and the current conversion transformer power-off signal which are sent by the gas conversion relay (4) through the data gateway and carries out logic judgment, and sends a starting signal to the main controller (5) after the logic is met, and the main controller (5) controls all the components to start to operate: the separation electromagnetic valve (3) is closed, the oil discharge submersible pump (13), the oil storage cabinet submersible pump (16) and the supercharger (27) are started to operate, and the oil discharge control valve (11), the oil storage cabinet oil discharge control valve (14), the medium control valve (21) and the medium control valve (24) of the oil storage cabinet are started to operate according to preset parameters; in the operation process, signals fed back by an oil discharge outlet flowmeter (19), a body oil discharge flowmeter (12) and an oil conservator oil discharge flowmeter (15) are calculated in real time to a main controller (5), and when flow rate mismatch occurs, an early warning signal is sent out and a control signal is sent to a body oil discharge control valve (11) and an oil conservator oil discharge control valve (14) to dynamically adjust the flow rate; the main body medium flow meter (22) feeds back signals to the main controller (5) in real time to perform real-time calculation with data of the main body oil drainage flow meter (12), and sends control signals to the main body medium control valve (21) to perform flow dynamic adjustment; the oil conservator medium flow meter (25) feeds back signals to the main controller (5) in real time and data of the oil conservator oil discharge flow meter (15) are calculated in real time, and control signals are sent to the oil conservator medium control valve (24) to dynamically adjust the flow.
Further, also comprises
The device comprises a body (1), a liquid level meter, an oil storage cabinet (2), an accident oil pool (20), a liquid level meter and a medium generation device (28), wherein the liquid level meter feeds back signals to a main controller (5) in real time for judgment, when the oil level of the body (1) is too low, a control signal is sent to close a body submersible pump (13) and a body oil discharge control valve (11), and when the oil level of the oil storage cabinet (2) is too low, a control signal is sent to close an oil storage cabinet submersible pump (16) and an oil storage cabinet oil discharge control valve (14); when the oil level of the accident oil pool (20) is overhigh, a control signal is sent to close a body submersible pump (13), a body oil discharge control valve (11), an oil storage cabinet submersible pump (16) and an oil storage cabinet oil discharge control valve (14); when the liquid level of the medium generating equipment (28) is too low, a control signal is sent to close the medium control valve (21) of the body, the medium control valve (24) of the oil storage cabinet and the supercharger (27); after the fire is eliminated, the device stops running and all the components reset.
Further, the control principle of the oil discharge and medium injection of the body (1) and the oil storage cabinet (2) and the oil discharge of the oil pit (17) is as follows:
oil sump volume and oil storage cabinet volume
Oil conservator medium injection amount is equal to oil conservator oil drainage amount
When any equation is not satisfied, the main controller (5) controls the corresponding control valve and the submersible pump to adjust.
The invention also provides a control system applying the device, which comprises
The gas collection module comprises a gas relay (4) arranged on a connecting pipeline between the oil conservator (2) and the body;
the oil cut-off module comprises a separation electromagnetic valve (3) arranged on a connecting pipeline between the oil conservator (2) and the body;
the oil drainage control module of the body comprises an oil drainage control valve (11), an oil drainage flowmeter (12) and an oil submersible pump (13) which are sequentially arranged on an oil drainage pipeline of the body (1) according to the flow direction of oil;
the oil discharge control module of the oil conservator (2) comprises an oil discharge control valve (14), an oil discharge flowmeter (15) and an oil conservator submersible pump (16) which are sequentially arranged on an oil discharge pipeline of the oil conservator (2) according to the flow direction of oil;
the fire fighting medium pipeline is sequentially provided with a body medium control valve (21), a body medium flowmeter (22) and a body medium check valve (23) according to the medium flow direction;
the medium flushing control module of the oil conservator (2) comprises an oil conservator medium control valve (24), an oil conservator medium flow meter (25) and an oil conservator medium check valve (26) which are sequentially arranged on a fire-fighting medium pipeline according to the medium flow direction;
the medium pressurization module comprises a pressurizer (27) arranged between the inlet ends of the fire-fighting medium pipeline of the body and the oil storage cabinet (2) and the outlet of the medium generation equipment (28);
the oil drain control module of the oil pit (17) comprises an oil drain outlet check valve (18) and an oil drain outlet flowmeter (19) which are sequentially arranged on a pipeline between the oil pit (17) and the accident oil pool (20) according to the oil flow direction;
the central control room (6) is used for receiving a fire alarm signal; the gas relay (4) and the main controller (5) are respectively in communication connection with the central control room (6);
the main controller (5) is in communication connection with the body oil discharge control valve (11), the body oil discharge flow meter (12), the body oil-submersible pump (13), the oil storage cabinet oil discharge control valve (14), the oil storage cabinet oil discharge flow meter (15), the oil storage cabinet oil-submersible pump (16), the body medium control valve (21), the body medium flow meter (22), the oil storage cabinet medium control valve (24), the oil storage cabinet medium flow meter (25), the supercharger (27), the separation electromagnetic valve (3) and the oil discharge outlet flow meter (19).
Further, an oil outlet of the body (1) is positioned at the bottom of the body, and a medium inlet is positioned at the top of the body; the oil outlet of the oil storage cabinet (2) is located at the bottom of the oil storage cabinet (2), and the medium inlet is located at the top of the oil storage cabinet (2).
Further, the control system also comprises
The liquid level acquisition module comprises a body (1), an oil storage cabinet (2), an accident oil pool (20) and medium generation equipment which are respectively provided with a liquid level meter; the 4 liquid level meters are in communication connection with the main controller (5).
Further, the control principle of the oil discharge and medium injection of the body and the oil storage cabinet (2) and the oil discharge of the oil pit (17) is as follows:
oil sump volume and oil storage cabinet volume
Oil conservator medium injection amount is equal to oil conservator oil drainage amount
When any equation is not satisfied, the main controller (5) controls the corresponding control valve and the submersible pump to adjust.
The invention has the advantages that:
1. the control valves and the flow meters are respectively arranged on the oil discharge pipelines of the body and the oil conservator, so that the independent control of the oil discharge speed of the two pipelines can be realized, similarly, the fire-fighting medium injection speeds of the body and the oil conservator can also be independently controlled, the matching of the oil discharge quantity and the medium injection quantity is realized, the vacancy after the oil level is reduced is timely filled, the fire disaster is inhibited from entering the converter transformer body, and the fire disaster scale expansion risk is reduced; meanwhile, cavities in the body and the oil storage cabinet are prevented from being formed, high-heat oil gas and insulating materials in the body and the oil storage cabinet are cooled, the potential safety hazard of reburning is reduced, safety guarantee and rescue favorable conditions are provided for rescuers, and the fire-fighting capacity of the converter transformer is improved;
2. the emergency oil discharge and fire-fighting medium linkage control is realized, the matching efficiency of the emergency oil discharge and the fire-fighting medium charging is improved, the accuracy and the stability of system operation are improved, and the safe discharge of the converter transformer oil is ensured, so that oil fire is prevented from entering a valve hall through the converter transformer valve side, and the emergency treatment level of the converter transformer fire-fighting is improved.
Drawings
FIG. 1 is a schematic structural diagram of an extra-high voltage commutation emergency oil discharge and fire-fighting medium injection device in an embodiment of the invention;
FIG. 2 is a simplified schematic diagram of the structure of FIG. 1;
FIG. 3 is a control logic block diagram of the extra-high voltage converter emergency oil discharge and fire-fighting medium injection device in the implementation of the invention;
FIG. 4 is a logic diagram of the control and start of the extra-high voltage converter emergency oil discharge and fire-fighting medium injection device in the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, the extra-high voltage converter transformer emergency oil discharge and fire-fighting medium injection device comprises a converter transformer body 1 and an oil storage cabinet 2, wherein an oil outlet of the oil storage cabinet 2 is communicated with an oil inlet of the body 1; the device comprises
The oil sump 17 is located below the converter transformer body 1, and is generally located underground. Accelerating oil discharge by using gravity;
the two ends of the body oil drainage pipeline are respectively connected with an oil outlet of the body and an oil inlet of the oil pit 17;
an oil discharge pipeline of the oil storage cabinet 2 is connected with the oil outlet of the oil storage cabinet 2 and the oil inlet of the oil pit 17 at two ends respectively;
a fire-fighting medium pipeline of the body, two ends of which are respectively connected with the outlet of the medium generating equipment 28 and the medium inlet of the body;
the two ends of the fire-fighting medium pipeline of the oil conservator 2 are respectively connected with the outlet of the medium generating equipment 28 and the medium inlet of the oil conservator 2;
the emergency oil pool 20 is typically located underground. An oil inlet of the accident oil pool 20 is communicated with an oil outlet of the oil pit 17;
a connecting pipeline between the oil conservator 2 and the body 1 is sequentially provided with a separating electromagnetic valve 3 and a gas relay 4 according to the flow direction of oil; the separating electromagnetic valve 3 is used for controlling the on-off of a connecting pipeline of the oil conservator 2 and the body 1, and the gas relay 4 is used for detecting gas in oil;
the oil discharging pipeline of the body is sequentially provided with an oil discharging control valve 11 of the body, an oil discharging flowmeter 12 of the body and an oil submersible pump 13 of the body according to the flow direction of oil, and is used for controlling the oil discharging speed of the body 1; the oil discharge pipeline of the oil conservator 2 is sequentially provided with an oil conservator oil discharge control valve 14, an oil conservator oil discharge flowmeter 15 and an oil conservator oil-submersible pump 16 according to the flow direction of oil, and is used for controlling the oil discharge speed of the oil conservator 2; the body fire-fighting medium pipeline is sequentially provided with a body medium control valve 21, a body medium flowmeter 22 and a body medium check valve 23 according to the medium flow direction, and is used for controlling the fire-fighting medium injection speed of the body 1 and preventing the fire-fighting medium from flowing back; the fire-fighting medium pipeline of the oil conservator 2 is sequentially provided with an oil conservator medium control valve 24, an oil conservator medium flowmeter 25 and an oil conservator medium check valve 26 according to the medium flow direction, and is used for controlling the fire-fighting medium injection speed of the oil conservator 2 and preventing the fire-fighting medium from flowing back; the inlet ends of the fire-fighting medium pipeline of the body and the fire-fighting medium pipeline of the oil conservator 2 are connected with the outlet of the medium generating device 28 through a supercharger 27;
an oil discharge outlet check valve 18 and an oil discharge outlet flowmeter 19 are sequentially arranged on a pipeline between the oil pit 17 and the accident oil pool 20 according to the oil flow direction, and are used for calculating the oil discharge amount of the oil pit 17 and preventing backflow;
the central control room 6 is used for receiving a fire alarm signal; the gas relay 4 and the main controller are respectively in communication connection with a central control room;
and the main controller 5 is in communication connection with the body oil discharge control valve 11, the body oil discharge flow meter 12, the body oil-submersible pump 13, the oil storage cabinet oil discharge control valve 14, the oil storage cabinet oil discharge flow meter 15, the oil storage cabinet oil-submersible pump 16, the body medium control valve 21, the body medium flow meter 22, the oil storage cabinet medium control valve 24, the oil storage cabinet medium flow meter 25, the supercharger 27, the separation electromagnetic valve 3 and the oil discharge outlet flow meter 19.
The body 1, the oil conservator 2, the accident oil pool 20 and the medium generating equipment are respectively provided with a liquid level meter; the 4 liquid level meters are all in communication connection with the main controller 5.
In the embodiment, the oil outlet of the body 1 is positioned at the bottom of the body 1, and the fire-fighting medium inlet is positioned at the top of the body 1; the oil outlet of the oil conservator 2 is positioned at the bottom of the oil conservator 2, and the medium inlet is positioned at the top of the oil conservator 2. The fire-fighting medium injected in the embodiment is compressed air foam, so that the fire-fighting medium is flame-retardant and is cooled.
As shown in fig. 3, the working principle of this embodiment is as follows: when a fire occurs, a background server of the central control room 6 receives a heavy gas signal, a fire alarm signal (external system signal) and a converter transformer outage signal (external system signal) sent by the gas-changing relay 4 through the data gateway and carries out logic judgment, the judgment logic is as shown in fig. 4, the gas signal adopts a two-out-of-three logic, and a start signal is sent to the main controller 5 after the logic is met by combining the fire alarm signal and the converter transformer outage signal, and the main controller 5 controls all components to start to operate: the separation electromagnetic valve 3 is closed, the body oil discharge submersible pump 13, the oil storage cabinet submersible pump 16 and the supercharger 27 are opened for operation, and the body oil discharge control valve 11, the oil storage cabinet oil discharge control valve 14, the body medium control valve 21 and the oil storage cabinet medium control valve 24 are opened for operation according to preset parameters; in the operation process, signals are fed back to a processor of the main controller 5 by the oil discharge outlet flow meter 19, the body oil discharge flow meter 12 and the oil conservator oil discharge flow meter 15 to be calculated in real time, and when flow rate mismatch occurs, an early warning signal is sent out and a control signal is sent to the body oil discharge control valve 11 and the oil conservator oil discharge control valve 14 to carry out flow rate dynamic adjustment; the body medium flow meter 22 feeds back a signal in real time to the processor of the main controller 5 to perform real-time calculation with the data of the body oil drainage flow meter 12, and sends a control signal to the body medium control valve 21 to perform flow dynamic adjustment; the flow meter 25 feeds back signals to the main controller 5 processor in real time and the data of the oil drain flow meter 15 of the oil conservator in real time for calculation, and sends control signals to the medium control valve 24 of the oil conservator for flow dynamic adjustment.
Through arranging the control valve and the flow meter on the oil discharge pipelines of the body 1 and the oil conservator 2 respectively, the independent control of the oil discharge speed of the two pipelines can be realized, and similarly, the fire-fighting medium injection speed of the body and the oil conservator can also be controlled independently, so that the matching of the oil discharge quantity and the medium flush quantity is realized, the vacancy after the oil level is reduced is filled in time, the fire disaster is inhibited from entering the converter transformer body, and the fire disaster scale expansion risk is reduced; simultaneously, cavities are prevented from being formed in the body and the oil storage cabinet, high-heat oil gas and insulating materials in the body and the oil storage cabinet are cooled, the potential safety hazard of re-combustion is reduced, safety guarantee and rescue favorable conditions are provided for rescuers, and the fire-fighting capacity of the converter transformer is improved.
A liquid level meter of a body 1, a liquid level meter of an oil storage cabinet 2, a liquid level meter of an emergency oil pool 20 and a liquid level meter of a medium generation device 28 (the liquid level meter of the medium generation device 28 is arranged in a liquid storage tank) feed back signals to a processor of a main controller 5 in real time for judgment, when the oil level of the body 1 is too low, a control signal is sent to close a body submersible pump 13 and a body oil discharge control valve 11, and when the oil level of the oil storage cabinet 2 is too low, a control signal is sent to close an oil storage cabinet submersible pump 16 and an oil storage cabinet oil; when the oil level of the accident oil pool 20 is overhigh, a control signal is sent to close the body submersible pump 13, the body oil discharge control valve 11, the oil storage cabinet submersible pump 16 and the oil storage cabinet oil discharge control valve 14; when the liquid level of the medium generating equipment 28 is too low, a control signal is sent to close the body medium control valve 21, the oil storage cabinet medium control valve 24 and the supercharger 27; after the fire is eliminated, the system stops running and all the components are reset.
Wherein, the linkage control principle that the oil extraction and the medium of body, oil conservator 2 pour into and oil pit 17 oil extraction into is:
oil sump volume and oil storage cabinet volume
Oil conservator medium injection amount is equal to oil conservator oil drainage amount
When any equation is not satisfied, the main controller 5 controls the corresponding control valve and the submersible pump to adjust in real time until the 3 equations are satisfied simultaneously.
Based on the above device, the present embodiment further provides a control system, which includes
The gas collection module comprises a gas relay 4 arranged on a connecting pipeline between the oil conservator 2 and the body;
the oil cut-off module comprises a separation electromagnetic valve 3 arranged on a connecting pipeline between the oil conservator 2 and the body;
the body oil discharge control module comprises a body oil discharge control valve 11, a body oil discharge flowmeter 12 and a body oil-submersible pump 13 which are sequentially arranged on a body oil discharge pipeline according to the flow direction of oil;
the oil discharge control module of the oil conservator 2 comprises an oil discharge control valve 14, an oil drain flowmeter 15 and an oil conservator submersible pump 16 which are sequentially arranged on an oil discharge pipeline of the oil conservator 2 according to the flow direction of oil;
the fire fighting medium pipeline is sequentially provided with a body medium control valve 21, a body medium flowmeter 22 and a body medium check valve 23 according to the medium flow direction;
the medium flushing control module of the oil conservator 2 comprises an oil conservator medium control valve 24, an oil conservator medium flowmeter 25 and an oil conservator medium check valve 26 which are sequentially arranged on a fire-fighting medium pipeline according to the medium flow direction;
the medium pressurizing module comprises a pressurizer 27 arranged between the inlet ends of the fire-fighting medium pipeline of the body fire-fighting medium pipeline and the oil storage cabinet 2 and the outlet of the medium generating equipment 28;
the oil drain control module of the oil sump 17 comprises an oil drain outlet check valve 18 and an oil drain outlet flowmeter 19 which are sequentially arranged on a pipeline between the oil sump 17 and the accident oil pool 20 according to the oil flow direction;
the central control room 6 is used for receiving a fire alarm signal; the gas relay 4 and the main controller 5 are respectively in communication connection with a central control room;
the main controller 5 is in communication connection with the body oil discharge control valve 11, the body oil discharge flow meter 12, the body oil-submerged pump 13, the oil storage cabinet oil discharge control valve 14, the oil storage cabinet oil discharge flow meter 15, the oil storage cabinet oil-submerged pump 16, the body medium control valve 21, the body medium flow meter 22, the oil storage cabinet medium control valve 24, the oil storage cabinet medium flow meter 25, the supercharger 27, the separation electromagnetic valve 3 and the oil discharge outlet flow meter 19;
the liquid level acquisition module comprises a body 1, an oil storage cabinet 2, an accident oil pool 20 and medium generation equipment which are respectively provided with a liquid level meter; the 4 liquid level meters are all in communication connection with the main controller 5.
In the embodiment, the oil outlet of the body is positioned at the bottom of the body, and the medium inlet is positioned at the top of the body; the oil outlet of the oil conservator 2 is positioned at the bottom of the oil conservator 2, and the medium inlet is positioned at the top of the body.
In this embodiment, the control principle of the oil discharge and medium injection of the body and the oil conservator 2 and the oil discharge of the oil sump 17 is as follows:
oil sump volume and oil storage cabinet volume
Oil conservator medium injection amount is equal to oil conservator oil drainage amount
When either equation is not satisfied, the main controller 5 controls the corresponding control valve and submersible pump to make adjustments.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An ultrahigh-voltage converter transformer emergency oil discharge and fire-fighting medium injection device comprises a converter transformer body (1) and an oil storage cabinet (2), wherein an oil outlet of the oil storage cabinet (2) is communicated with an oil inlet of the body (1); the method is characterized in that: the device comprises
An oil pit (17) located below the converter transformer;
an oil discharge pipeline of the body (1) is connected with an oil outlet of the body (1) and an oil inlet of the oil pit (17) at two ends respectively;
an oil discharge pipeline of the oil storage cabinet (2) is connected with the two ends of the oil discharge pipeline respectively, and the two ends of the oil discharge pipeline are connected with an oil outlet of the oil storage cabinet (2) and an oil inlet of the oil pit (17);
the two ends of the fire-fighting medium pipeline of the body are respectively connected with the outlet of the medium generating equipment (28) and the medium inlet of the body (1);
the two ends of the fire-fighting medium pipeline of the oil conservator (2) are respectively connected with the outlet of the medium generating equipment and the medium inlet of the oil conservator (2);
an oil inlet of the accident oil pool (20) is communicated with an oil outlet of the oil pit (17);
a connecting pipeline between the oil conservator (2) and the body is sequentially provided with a separating electromagnetic valve (3) and a gas relay (4) according to the flow direction of oil;
the oil discharge pipeline of the body (1) is sequentially provided with a body oil discharge control valve (11), a body oil discharge flowmeter (12) and a body oil-submersible pump (13) according to the flow direction of oil; an oil discharge pipeline of the oil conservator (2) is sequentially provided with an oil conservator oil discharge control valve (14), an oil conservator oil discharge flowmeter (15) and an oil conservator submersible pump (16) according to the flow direction of oil; the fire-fighting medium pipeline of the body is sequentially provided with a body medium control valve (21), a body medium flowmeter (22) and a body medium check valve (23) according to the medium flow direction; the fire-fighting medium pipeline of the oil conservator (2) is sequentially provided with an oil conservator medium control valve (24), an oil conservator medium flowmeter (25) and an oil conservator medium check valve (26) according to the medium flow direction; the inlet ends of the fire-fighting medium pipeline of the body and the fire-fighting medium pipeline of the oil storage cabinet (2) are connected with the outlet of the medium generating equipment (28) through a supercharger (27);
an oil discharge outlet check valve (18) and an oil discharge outlet flowmeter (19) are sequentially arranged on a pipeline between the oil pit (17) and the accident oil pool (20) according to the oil flow direction;
the central control room (6) is used for receiving a fire alarm signal; the gas relay (4) and the main controller (5) are respectively in communication connection with a central control room;
the main controller (5) is in communication connection with the body oil discharge control valve (11), the body oil discharge flow meter (12), the body oil-submersible pump (13), the oil storage cabinet oil discharge control valve (14), the oil storage cabinet oil discharge flow meter (15), the oil storage cabinet oil-submersible pump (16), the body medium control valve (21), the body medium flow meter (22), the oil storage cabinet medium control valve (24), the oil storage cabinet medium flow meter (25), the supercharger (27), the separation electromagnetic valve (3) and the oil discharge outlet flow meter (19).
2. The apparatus of claim 1, wherein: the oil outlet of the body (1) is positioned at the bottom of the body (1), and the medium inlet is positioned at the top of the body (1); the oil outlet of the oil storage cabinet (2) is positioned at the bottom of the oil storage cabinet (2), and the medium inlet is positioned at the top of the oil storage cabinet (2).
3. The apparatus of claim 1 or 2, wherein: the body (1), the oil storage cabinet (2), the accident oil pool (20) and the medium generating equipment are respectively provided with a liquid level meter; the 4 liquid level meters are in communication connection with the main controller (5).
4. A control method based on the apparatus of any one of claims 1 to 3, characterized in that: the control method comprises the following steps:
the background server of the central control room (6) receives the heavy gas signal, the fire alarm signal and the current conversion transformer power-off signal which are sent by the gas conversion relay (4) through the data gateway and carries out logic judgment, and sends a starting signal to the main controller (5) after the logic is met, and the main controller (5) controls all the components to start to operate: the separation electromagnetic valve (3) is closed, the oil discharge submersible pump (13), the oil storage cabinet submersible pump (16) and the supercharger (27) are started to operate, and the oil discharge control valve (11), the oil storage cabinet oil discharge control valve (14), the medium control valve (21) and the medium control valve (24) of the oil storage cabinet are started to operate according to preset parameters; in the operation process, signals fed back by an oil discharge outlet flowmeter (19), a body oil discharge flowmeter (12) and an oil conservator oil discharge flowmeter (15) are calculated in real time to a main controller (5), and when flow rate mismatch occurs, an early warning signal is sent out and a control signal is sent to a body oil discharge control valve (11) and an oil conservator oil discharge control valve (14) to dynamically adjust the flow rate; the main body medium flow meter (22) feeds back signals to the main controller (5) in real time to perform real-time calculation with data of the main body oil drainage flow meter (12), and sends control signals to the main body medium control valve (21) to perform flow dynamic adjustment; the oil conservator medium flow meter (25) feeds back signals to the main controller (5) in real time and data of the oil conservator oil discharge flow meter (15) are calculated in real time, and control signals are sent to the oil conservator medium control valve (24) to dynamically adjust the flow.
5. The control method according to claim 4, characterized in that: also comprises
The device comprises a body (1), a liquid level meter, an oil storage cabinet (2), an accident oil pool (20), a liquid level meter and a medium generation device (28), wherein the liquid level meter feeds back signals to a main controller (5) in real time for judgment, when the oil level of the body (1) is too low, a control signal is sent to close a body submersible pump (13) and a body oil discharge control valve (11), and when the oil level of the oil storage cabinet (2) is too low, a control signal is sent to close an oil storage cabinet submersible pump (16) and an oil storage cabinet oil discharge control valve (14); when the oil level of the accident oil pool (20) is overhigh, a control signal is sent to close a body submersible pump (13), a body oil discharge control valve (11), an oil storage cabinet submersible pump (16) and an oil storage cabinet oil discharge control valve (14); when the oil level of the medium generating equipment (28) is too low, a control signal is sent to close the main body medium control valve (21), the oil storage cabinet medium control valve (24) and the supercharger (27); after the fire is eliminated, the device stops running and all the components reset.
6. The control method according to claim 5, characterized in that: the control principle of the oil discharge and medium injection of the body (1) and the oil storage cabinet (2) and the oil discharge of the oil pit (17) is as follows:
oil sump oil displacement as the sum of the oil displacement of the main body and the oil storage cabinet
The amount of the injected medium is equal to the amount of the discharged oil
Oil conservator medium injection amount is equal to oil conservator oil drainage amount
When any equation is not satisfied, the main controller (5) controls the corresponding control valve and the submersible pump to adjust.
7. A control system based on the device of any one of claims 1 to 3, characterized in that: the gas collection module comprises a gas relay (4) arranged on a connecting pipeline between the oil conservator (2) and the body;
the oil cut-off module comprises a separation electromagnetic valve (3) arranged on a connecting pipeline between the oil conservator (2) and the body;
the oil drainage control module of the body comprises an oil drainage control valve (11), an oil drainage flowmeter (12) and an oil submersible pump (13) which are sequentially arranged on an oil drainage pipeline of the body (1) according to the flow direction of oil;
the oil discharge control module of the oil conservator (2) comprises an oil discharge control valve (14), an oil discharge flowmeter (15) and an oil conservator submersible pump (16) which are sequentially arranged on an oil discharge pipeline of the oil conservator (2) according to the flow direction of oil;
the fire fighting medium pipeline is sequentially provided with a body medium control valve (21), a body medium flowmeter (22) and a body medium check valve (23) according to the medium flow direction;
the medium flushing control module of the oil conservator (2) comprises an oil conservator medium control valve (24), an oil conservator medium flow meter (25) and an oil conservator medium check valve (26) which are sequentially arranged on a fire-fighting medium pipeline according to the medium flow direction;
the medium pressurization module comprises a pressurizer (27) arranged between the inlet ends of the fire-fighting medium pipeline of the body and the oil storage cabinet (2) and the outlet of the medium generation equipment (28);
the oil drain control module of the oil pit (17) comprises an oil drain outlet check valve (18) and an oil drain outlet flowmeter (19) which are sequentially arranged on a pipeline between the oil pit (17) and the accident oil pool (20) according to the oil flow direction;
the central control room (6) is used for receiving a fire alarm signal; the gas relay (4) and the main controller (5) are respectively in communication connection with a central control room;
the main controller (5) is in communication connection with the body oil discharge control valve (11), the body oil discharge flow meter (12), the body oil-submersible pump (13), the oil storage cabinet oil discharge control valve (14), the oil storage cabinet oil discharge flow meter (15), the oil storage cabinet oil-submersible pump (16), the body medium control valve (21), the body medium flow meter (22), the oil storage cabinet medium control valve (24), the oil storage cabinet medium flow meter (25), the supercharger (27), the separation electromagnetic valve (3) and the oil discharge outlet flow meter (19).
8. The control system of claim 7, wherein: the oil outlet of the body (1) is positioned at the bottom of the body, and the medium inlet is positioned at the top of the body; the oil outlet of the oil storage cabinet (2) is located at the bottom of the oil storage cabinet (2), and the medium inlet is located at the top of the oil storage cabinet (2).
9. The control system according to claim 7 or 8, characterized in that: the control system further comprises
The liquid level acquisition module comprises a body (1), an oil storage cabinet (2), an accident oil pool (20) and medium generation equipment which are respectively provided with a liquid level meter; the 4 liquid level meters are in communication connection with the main controller (5).
10. The control system of claim 9, wherein: the control principle of the oil discharge and medium injection of the body and the oil storage cabinet (2) and the oil discharge of the oil pit (17) is as follows:
oil sump oil displacement as the sum of the oil displacement of the main body and the oil storage cabinet
The amount of the injected medium is equal to the amount of the discharged oil
Oil conservator medium injection amount is equal to oil conservator oil drainage amount
When any equation is not satisfied, the main controller (5) controls the corresponding control valve and the submersible pump to adjust.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112630637A (en) * | 2020-11-20 | 2021-04-09 | 国网山东省电力公司青岛供电公司 | Online checking system and method for gas relay of power transformer |
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