CN111790089B

CN111790089B - Fire extinguishing system and method for in-operation extra-high voltage converter station and in-operation extra-high voltage converter station

Info

Publication number: CN111790089B
Application number: CN202010573962.1A
Authority: CN
Inventors: 王庆; 张佳庆; 黄玉彪; 张民; 谭静; 王刘芳; 程登峰; 田宇; 柯艳国; 罗沙; 谢佳; 范明豪; 李伟; 过羿; 尚峰举; 刘睿; 苏文
Original assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Anhui Electric Power Co Ltd; State Grid Economic and Technological Research Institute
Current assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Anhui Electric Power Co Ltd; State Grid Economic and Technological Research Institute
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-10-01
Anticipated expiration: 2040-06-22
Also published as: CN111790089A

Abstract

The invention discloses a fire extinguishing system and a method for transporting an extra-high voltage converter station and the extra-high voltage converter station, wherein the fire extinguishing system comprises a first foam fire monitor fire extinguishing system, a second foam fire monitor fire extinguishing system and a master control module, the first foam fire monitor fire extinguishing system comprises at least one first fire monitor, the second foam fire monitor fire extinguishing system comprises at least one second fire monitor, the master control module is respectively connected with the first foam fire monitor fire extinguishing system and the second foam fire monitor fire extinguishing system, a plurality of first fire monitors are arranged above a single-valve-set converter-transformer cornice of the extra-high voltage converter station in a linear array mode, one second fire monitor is arranged between every two first fire monitors, and one first fire monitor and one second fire monitor are arranged above every two converter transformers; the invention has the advantages that: the fire extinguishing system capable of completely covering the fire hazard range of the converter transformer is provided on the premise of not damaging the structure of the converter station, and is suitable for operating the ultrahigh voltage converter station.

Description

Fire extinguishing system and method for in-operation extra-high voltage converter station and in-operation extra-high voltage converter station

Technical Field

The invention relates to the technical field of fire extinguishing of an extra-high voltage converter station, in particular to a fire extinguishing system and method for operating the extra-high voltage converter station and the extra-high voltage converter station.

Background

The ultra-high voltage direct current transmission is one of the most advanced transmission technologies in the world, and China has become a world direct current transmission big country and led the development of the ultra-high voltage direct current transmission technology. In 2016, 11 days in 1 month, and the construction of +/-1100 kV extra-high voltage direct current transmission engineering in the east-Anhui south (Changji-Anhui Xuan city in Xinjiang). The method is an ultra-high voltage transmission project which has the highest voltage level, the largest transmission capacity, the farthest transmission distance and the most advanced technical level in the world at present.

The extra-high voltage converter station supports the task of electric power remote transmission, is an important infrastructure for transmitting electricity from west to east, has more than 40 converter stations which are put into operation (in transit) in China, and has important significance for social production and life. Converter transformers in the extra-high voltage converter station belong to large-scale oil-containing equipment, and the oil content of a single piece of equipment is about 200 tons. Once a converter transformer is in fire, phenomena such as explosion, deflagration and the like are often caused, and past accidents show that the converter transformer fire has the characteristics of large fire scale, complex fire form, explosiveness and the like.

Accidents in recent years also show that a fire extinguishing system configured in an operating extra-high voltage converter station is difficult to completely cover the special fire behavior of converter transformer, and the existing fire extinguishing system and the design scheme for hoisting in the operating extra-high voltage converter station converter transformer area have the following problems and difficulties: firstly, the original fire-fighting system is not enough to cover the converter transformer fire; secondly, as the nationwide power transmission task is carried out in the operation converter station, the annual power failure maintenance time period is short (about 10 to 14 days), and no design method suitable for the lifting of the fire-fighting system in the power failure period of the operation converter station exists; thirdly, the operation of the converter station is limited by practical factors and conditions, and a fire extinguishing system with only a single releasing device can be arranged, so that the reliability design of the fire extinguishing system with only a single releasing device is not provided; and the newly added fire extinguishing system needs to improve the capability of resisting the interference of severe external complex environment.

A series of related researches are carried out at home and abroad about the fire extinguishing mechanism of the transformer. The national standards for the United states (NFPA) specify various extinguishing means, the amount of fire suppressant used and the duration of the fire in the transformer. The explosion-proof and fire-extinguishing device of the oil immersed transformer is researched in detail by Shanxi Huaze aluminum Electricity Co., Ltd, journal document ' shallow precipitation oil immersed transformer explosion-proof and fire-extinguishing device ' J ', Chinese equipment engineering, 2005(4): 36-37. Journal literature on the discussion about the fire-fighting measures of oil-immersed transformers [ J ] published by Fujian electric power saving survey design institute, energy sources and environments, 2004(4), 59-62, which illustrate and compare the fire extinguishing mechanism and the working principle of two fire-fighting systems of water spray, oil discharge and nitrogen injection. The published journal literature, research on automatic fire extinguishing facilities of large oil immersed transformers, 2003,31(12):53-55, published by the fire department in Shanghai, analyzes and compares various automatic fire extinguishing facilities adopted by the existing transformers, and proposes a fire extinguishing mode suitable for large main transformers. A public security fire branch in the east of the sea in Qinghai province publishes a document 'trial-and-study large-scale oil-immersed transformer oil-discharge nitrogen-injection fire-extinguishing system' [ C ]// China science society of society for the New year.2008, researches and explains the mechanism of pressure reduction and explosion prevention and nitrogen injection cooling of a transformer by using an oil-discharge nitrogen-injection device. A transformer oil discharge and nitrogen injection device is considered to be an environment-friendly new technical product which is mainly used for prevention and combined prevention and elimination. The Baoding Tianwei Bao transformation gas company, Inc. publishes the document application of oil immersed transformer fire and fire extinguishing device [ J ] the transformer, 2006,43(10):40-42, analyzes the cause of the oil immersed transformer fire, and introduces the fire extinguishing mechanism, advantages and disadvantages and application of various fire extinguishing devices.

In summary, detailed argumentations for the applicability of the transformer fire extinguishing technology of the ultra-high voltage converter station do not exist at home and abroad, the effective fire extinguishing technology is related to fire disasters and structural characteristics of a protected area, currently, fire extinguishing research aiming at the transformer is mostly carried out independently aiming at typical fuels, or is simple, listed and compared with basic fire extinguishing technical means, and the fire extinguishing system and the fire extinguishing method thereof suitable for operating the ultra-high voltage converter station lack correlation analysis with the structure of the ultra-high voltage converter station.

Disclosure of Invention

The invention aims to solve the technical problem that a fire extinguishing system and a method suitable for operating an extra-high voltage converter station are lacked in the prior art.

The invention solves the technical problems through the following technical means: the utility model provides a fire extinguishing systems suitable for transporting extra-high voltage converter station, includes first foam fire monitor fire extinguishing systems, second foam fire monitor fire extinguishing systems and host system, first foam fire monitor fire extinguishing systems includes at least one first fire monitor, and second foam fire monitor fire extinguishing systems includes at least one second fire monitor, and host system is connected with first foam fire monitor fire extinguishing systems and second foam fire monitor fire extinguishing systems respectively, and a plurality of first fire monitor is linear array and arranges the top of the single valve group converter flow cornice of extra-high voltage converter station, arranges a second fire monitor between per two first fire monitors, and what per two converter change top correspond has a first fire monitor and a second fire monitor.

The invention is provided with two sets of fire extinguishing systems, fire guns of the two sets of fire extinguishing systems are linearly arranged above a single valve group converter transformer overhanging eave of an extra-high voltage converter station, a second fire gun is arranged between every two first fire guns, the two fire extinguishing systems respectively control the first fire gun and the second fire gun, the two sets of systems are independently controlled and simultaneously provide fire extinguishing media for a fire extinguishing area, the fire extinguishing efficiency is high, the first fire gun and the second fire gun are arranged above every two converter transformers, the fire extinguishing media released by a terminal can completely cover the converter transformer, the fire extinguishing effect is good, the fire extinguishing systems capable of completely covering the converter transformer fire range can not be damaged on the premise of transporting the structure of the converter station, and the invention is suitable for transporting the extra-high voltage converter station.

Further, first foam fire gun fire extinguishing systems still includes first compressed air foam and produces the subsystem, first fire gun produces the exit linkage of subsystem through first confession bubble pipeline and first compressed air foam, the exit linkage of second fire gun through second confession bubble pipeline and first compressed air foam production subsystem, first compressed air foam production subsystem is connected with the host system electricity.

Furthermore, the second foam fire monitor fire extinguishing system further comprises a second compressed air foam generation subsystem, the first fire monitor is connected with an outlet of the second compressed air foam generation subsystem through a first foam supply pipeline, the second fire monitor is connected with an outlet of the second compressed air foam generation subsystem through a second foam supply pipeline, and the second compressed air foam generation subsystem is electrically connected with the main control module.

Still further, the first compressed air foam generating subsystem and the second compressed air foam generating subsystem are disposed at locations remote from the area where the converter transformer is located.

Still further, the extra-high voltage converter station comprises a plurality of groups of single valve group converter transformers which are arranged in parallel, each single valve group converter transformer comprises a plurality of converter transformers which are arranged at equal intervals, adjacent converter transformers are separated by a firewall, a valve hall is arranged on the rear side of each single valve group converter transformer in parallel, the single valve group converter transformers and the corresponding valve hall integrally form a pole, the two poles are arranged into a group, each group of poles comprises a high-end valve group and a low-end valve group, two poles in the same group of poles are arranged in a mirror symmetry mode, the low-end valve groups between the adjacent groups of poles are arranged back to back or the high-end valve groups are arranged back to back, and a sleeve on the side of the valve hall of each converter transformer extends into the corresponding valve hall.

And furthermore, one end of each single-valve group converter transformer near the first compressed air foam generation subsystem and one end of each single-valve group converter transformer near the second compressed air foam generation subsystem are respectively provided with a first partition selection valve and a second partition selection valve, all first fire guns in the single-valve group converter transformers are connected with the first partition selection valves through pipelines, all first partition selection valves in the ultrahigh voltage converter station are connected with the first foam supply pipelines, all second fire guns in the single-valve group converter transformers are connected with the second partition selection valves through pipelines, all second partition selection valves in the ultrahigh voltage converter station are connected with the second foam supply pipelines, the first compressed air foam generation subsystem is respectively connected with the first foam supply pipelines and the second foam supply pipelines, and the second compressed air foam generation subsystem is respectively connected with the first foam supply pipelines and the second foam supply pipelines.

In an initial state, the valve connected with the first bubble supply pipeline of the first compressed air foam generation subsystem is in an open state, and the valve connected with the second bubble supply pipeline is in a closed state.

In an initial state, the valve of the second compressed air foam generation subsystem connected with the second foam supply pipeline is in an open state, and the valve connected with the first foam supply pipeline is in a closed state.

Still further, first fire gun and second fire gun are located the valve room cornice directly over preventing the hot wall, and first fire gun and second fire gun interval interlude are arranged, and every two changes flow corresponds a first fire gun and a second fire gun, and during putting out a fire, the medium release direction of putting out a fire of first fire gun and second fire gun all points to its corresponding central point that changes flow that catches fire to put on fire to put into a fire.

Further, fire extinguishing systems suitable for being in transporting extra-high voltage converter station still includes first redundant mouth and the redundant mouth of connecing of second, first redundant mouth of connecing is a redundant interface of first confession bubble pipeline, and this redundant interface extends to the wide field of converter flow region, the redundant mouth of connecing of second supplies a redundant interface of bubble pipeline for the second, and this redundant interface extends to the wide field region of converter flow region, first redundant mouth of connecing is the same with the redundant mouth interface size and shape homogeneous phase of connecing of second, and first redundant mouth of connecing is through a manual gate valve and external interface intercommunication, and the redundant interface of second is through another manual gate valve and external interface intercommunication.

Furthermore, the fire extinguishing system suitable for transporting the extra-high voltage converter station further comprises a movable fire-fighting robot, the movable fire-fighting robot is connected with a water hose, the water hose is provided with a bayonet matched with the first redundant connection port and the second redundant connection port, the bayonet is connected with an external interface in a clamping mode, a fire extinguishing medium is obtained through the first redundant connection port or the second redundant connection port, and the movable fire-fighting robot is moved to a preset area to conduct directional fire extinguishing.

The invention also provides a fire extinguishing method suitable for a fire extinguishing system operating the extra-high voltage converter station, which comprises the following steps:

when a certain converter transformer catches fire, start first foam fire gun fire extinguishing systems and second foam fire gun fire extinguishing systems simultaneously, the priority of the fire extinguishing systems that becomes nearer apart from the converter transformer that catches fire among first foam fire gun fire extinguishing systems of main control module control and the second foam fire gun fire extinguishing systems is to arranging that this converter transformer top becomes nearest fire gun to supply the bubble, the main control module control is apart from the fire extinguishing systems that the converter transformer far away in first foam fire gun fire extinguishing systems and the second foam fire gun fire extinguishing systems that catch fire to another fire gun of arranging above this converter transformer to supply the bubble.

Furthermore, the in-operation ultrahigh voltage converter station comprises a pole-1 high-end valve group, the first foam fire monitor fire extinguishing system comprises a first compressed air foam generating subsystem, the second foam fire monitor fire extinguishing system further comprises a second compressed air foam generating subsystem, one end of the pole-1 high-end valve group, which is close to the first compressed air foam generating subsystem and one end of the second compressed air foam generating subsystem, are provided with a first partition selecting valve and a second partition selecting valve, all the first fire monitors are connected with the first partition selecting valve through pipelines, and the second fire monitors are connected with the second partition selecting valve through pipelines;

the main control module judges that the fire disaster is the utmost point 1 high-end valve group, utmost point 1 high-end valve group and first compressed air foam generation subsystem both arrange in utmost point 1 square, so first compressed air foam generation subsystem is nearer from utmost point 1 high-end valve group, the first subregion selection valve that main control module control first compressed air foam generation subsystem is connected is opened, the first compressed air foam generation subsystem of automatic start, first compressed air foam generation subsystem supplies the bubble to first fire gun, make and put out a fire from a fire gun that the converter flow that catches fire is nearest.

Furthermore, the second compressed air foam generation subsystem is arranged on the 2 nd square, the second compressed air foam generation subsystem is far away from the 1 st high-end valve group, the main control module controls a second partition selection valve connected with the second compressed air foam generation subsystem to be opened, the second compressed air foam generation subsystem is started automatically, and the second compressed air foam generation subsystem supplies foam to the second fire monitor, so that the fire monitor close to the second position of the ignition converter is used for extinguishing fire.

Further, the method further comprises:

when a certain converter transformer catches fire, start first foam fire gun fire extinguishing systems and second foam fire gun fire extinguishing systems simultaneously, if one of them fire extinguishing systems breaks down, the fire extinguishing systems that can normally work in the first foam fire gun fire extinguishing systems of main control module control supplies the bubble to first fire gun and second fire gun that this converter transformer top corresponds simultaneously to the fire extinguishing systems of second foam fire gun fire extinguishing systems.

Furthermore, when a certain converter of the extreme-1 high-end valve group is ignited, the first foam fire monitor fire extinguishing system cannot work due to faults, the first compressed air foam generating subsystem cannot work, the main control module controls the second foam fire monitor fire extinguishing system to start, the second compressed air foam generating subsystem starts, the main control module controls the first partition selecting valve and the second partition selecting valve to be opened, and the second compressed air foam generating subsystem supplies foam to the first fire monitor and the second fire monitor simultaneously.

Furthermore, when a certain converter of the extreme-1 high-end valve group is on fire, the second foam fire monitor fire extinguishing system cannot work due to faults, the second compressed air foam generating subsystem cannot work, the main control module controls the first foam fire monitor fire extinguishing system to start, the first compressed air foam generating subsystem starts, the main control module controls the first partition selecting valve and the second partition selecting valve to be opened, and the first compressed air foam generating subsystem supplies foam to the first fire monitor and the second fire monitor simultaneously.

Further, the method further comprises:

when a certain fire monitor extinguishes fire, the spraying effect is not good or the fire extinguishing medium cannot be released due to the fact that the fire extinguishing is influenced by external environmental factors, the fire extinguishing medium is acquired through a redundant connecting port of a movable fire-fighting robot, which is connected with a first foam fire monitor fire extinguishing system or a second foam fire monitor fire extinguishing system, and the fire extinguishing medium is moved to a predetermined area to conduct directional fire extinguishing.

The invention also provides an in-operation ultrahigh voltage converter station with the fire extinguishing system, which comprises a plurality of groups of single valve group converter transformers which are arranged in parallel, each single valve group converter transformer comprises a plurality of converter transformers which are arranged at equal intervals, adjacent converter transformers are separated by a firewall, a valve hall is arranged on the rear side of each single valve group converter transformer in parallel, at least one compressed air foam generating subsystem and a control module are further included, the control module is respectively connected with all the compressed air foam generating subsystems, and the outlets of the compressed air foam generating subsystems are communicated with all the first fire-fighting cannons and all the second fire-fighting cannons.

The invention has the advantages that:

(1) the invention is provided with two sets of fire extinguishing systems, the fire guns of the two sets of fire extinguishing systems are linearly arranged above the single valve group converter transformer overhanging eave of the extra-high voltage converter station, a second fire gun is arranged between every two first fire guns, the first fire guns and the second fire guns are respectively controlled, the two sets of systems are independently controlled and simultaneously provide fire extinguishing medium for a fire extinguishing area, the fire extinguishing efficiency is high, the first fire guns and the second fire guns are correspondingly arranged above every two converter transformers, the fire extinguishing medium released by a terminal can completely cover each converter transformer of the single valve group without difference, the fire extinguishing effect is good, the fire extinguishing system capable of completely covering the fire hazard range of the converter transformer is provided on the premise of not damaging the grounding valve tower above the cornice, the cornice structure and the original facilities above the cornice of the converter station and meeting the requirement of a short power failure period of the converter station, and is suitable for the ultrahigh voltage converter station.

(2) The two sets of compressed air foam generating subsystems are arranged at the positions far away from the area where the converter transformer is located, so that the situation that the fire extinguishing medium generating subsystem is damaged due to fire and cannot supply foam is avoided, and the fire extinguishing medium generating subsystems still can generate the fire extinguishing medium and output the fire extinguishing medium to the vicinity of a fire point through a pipeline even if a fire monitor is damaged due to explosion.

(3) Setting a fire extinguishing priority principle, when a certain converter transformer is on fire, the main control module controls a fire extinguishing system which is closer to the converter transformer on fire to preferentially supply bubbles to a fire monitor which is arranged above the converter transformer and is closest to the converter transformer, and compressed air foam is provided at the fastest time and the closest transmission distance when a fire disaster occurs, so that the fire extinguishing speed is improved.

(4) Set up reserve fire extinguishing principle, first compressed air foam produces subsystem and second compressed air foam and produces the subsystem and all be connected with first fire gun and second fire gun, when certain fire extinguishing medium produces the subsystem and breaks down and can not produce the foam, make the fire extinguishing medium that can normally work produce the subsystem and supply the bubble for first fire gun and second fire gun simultaneously, avoid damaging because of single fire extinguishing medium subsystem, the fire gun that produces the subsystem and be connected with the fire extinguishing medium of this damage that leads to catching fire the converter flow top does not have the foam blowout, guarantee that the fire extinguishing medium covers the converter flow that catches fire completely.

(5) The movable fire-fighting robot has the advantages that the fixed-movable combined fire-fighting function is realized, the movable fire-fighting robot is arranged, when a fire disaster occurs, the spraying effect of a certain fire monitor is not good, a bayonet used for conveying compressed air foam of the movable robot can be connected with a first redundant connection port of a first foam fire-fighting monitor fire-fighting system or a second redundant connection port of a second foam fire-fighting monitor fire-fighting system, fire extinguishing media are obtained from a first compressed air foam generation subsystem or a second compressed air foam generation subsystem, and the movable fire-fighting robot is moved to a designated area to extinguish the fire.

Drawings

FIG. 1 is a diagram of a fire suppression system layout for a four-valve set extra-high voltage converter station in a fire suppression system for operating extra-high voltage converter stations, according to an embodiment of the present invention;

FIG. 2 is a YYA phase change converter fire extinguishing schematic diagram of the extreme 1 high-end valve set of FIG. 1;

FIG. 3 is a schematic diagram of the YDB phase converter transformer fire suppression of the extreme 2 low end valve bank of FIG. 1;

FIG. 4 is a YYC phase change converter fire extinguishing schematic diagram of the pole 1 high-end valve set of FIG. 1;

FIG. 5 is a fire extinguishing flow chart of a fire extinguishing system suitable for operating an extra-high voltage converter station according to an embodiment of the invention;

FIG. 6 is a detailed flow chart of a part A of a fire extinguishing process of a fire extinguishing system suitable for operating an extra-high voltage converter station, which is disclosed by the embodiment of the invention;

fig. 7 is a detailed flow chart of a part B of a fire extinguishing process of the fire extinguishing system suitable for operating the extra-high voltage converter station, which is disclosed by the embodiment of the invention.

Wherein, the parts represented by each reference number are as follows:

1. converter transformer 2, firewall 3, valve hall 4 and first fire monitor

5. A first compressed air foam generating subsystem 6 and a second fire monitor

7. A second compressed air foam generating subsystem 8, a main control module 9 and a first partition selecting valve

10. A second partition selection valve 11, a first bubble supply pipeline 12 and a second bubble supply pipeline

13. A first local control cabinet 14, a second local control cabinet 15 and an electric valve

16. Manual gate valve 17, external interface 18, portable fire-fighting robot

19. Water hose 100, single valve group converter 200 and extreme 1 high-end valve group

300. An extreme 1 low side valve block 400, an extreme 2 low side valve block 500, and an extreme 2 high side valve block.

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.

Example 1

As shown in fig. 1, the present invention is applied to an operating extra-high voltage converter station, a fire extinguishing system is arranged at the operating extra-high voltage converter station, the operating extra-high voltage converter station includes a plurality of sets of single-valve-set converter transformers 100 arranged in parallel, each single-valve-set converter transformer 100 includes a plurality of converter transformers 1 arranged at equal intervals, adjacent converter transformers 1 are separated by a firewall 2, a valve hall 3 is arranged in parallel at the rear side of each single-valve-set converter 100, the single-valve-set converter 100 and the corresponding valve hall 3 integrally form a pole, two poles form a set of poles, each pole includes a high-end valve set and a low-end valve set, two poles in the same set of poles are arranged in a mirror symmetry manner, the low-end valve sets between adjacent sets of poles are arranged back to back or the high-end valve sets are arranged back to back, and sleeves at the valve hall 3 side of each converter transformer 1 extend into the corresponding valve hall 3. As shown in fig. 1, in this embodiment, the extra-high voltage converter station includes four poles arranged in parallel in sequence, that is, an extreme 1 high-end valve group 200, an extreme 1 low-end valve group 300, an extreme 2 low-end valve group 400, and an extreme 2 high-end valve group 500, the extreme 1 high-end valve group 200 and the extreme 1 low-end valve group 300 are arranged in mirror symmetry, the extreme 2 high-end valve group and the extreme 2 low-end valve group 400 are arranged in mirror symmetry, the extreme 1 low-end valve group 300 and the extreme 2 low-end valve group 400 are arranged back to back, wherein each single-valve-group converter 100 has 6 converter transformers 1, adjacent converter transformers 1 are separated by a firewall 2, and are arranged at equal intervals.

With particular reference to fig. 1, the fire extinguishing system suitable for operating the extra-high voltage converter station comprises a first foam fire monitor fire extinguishing system, a second foam fire monitor fire extinguishing system and a main control module 8, wherein the first foam fire monitor fire extinguishing system comprises a first fire monitor 4 and a first compressed air foam generation subsystem 5, and the second foam fire monitor fire extinguishing system comprises a second fire monitor 6 and a second compressed air foam generation subsystem 7. The fire extinguishing medium output by the first compressed air foam generating subsystem 5 and the second compressed air foam generating subsystem 7 is compressed air foam.

First fire gun 4 and second fire gun 6 are located and prevent on the valve room 3 cornice directly over wall 2, and

first fire gun

4 and 6 intervals interlude of second fire gun are arranged, and every two change current 1 corresponds a first fire gun 4 and a second fire gun 6, and during putting out a fire, the medium direction of putting out a fire of first fire gun 4 and second fire gun 6 all points to its corresponding change current central point that changes 1 puts.

One end of each single valve group converter transformer substation 100, which is close to the first compressed air foam generating subsystem 5 and the second compressed air foam generating subsystem 7, is provided with a first partition selection valve 9 and a second partition selection valve 10, all the first fire guns 4 in the single valve group converter substation 100 are connected with the first partition selection valve 9 through pipelines, all the first partition selection valves 9 in the ultra-high voltage converter station are connected with a first foam supply pipeline 11, the second fire guns 6 in the single valve group converter substation 100 are connected with the second partition selection valve 10 through pipelines, all the second partition selection valves 10 in the ultra-high voltage converter station are connected with a second foam supply pipeline 12, the first compressed air foam generating subsystem 5 is respectively connected with the first foam supply pipeline 11 and the second foam supply pipeline 12 through electric valves 15, and in an initial state, the electric valves 15 of the first compressed air foam generating subsystem 5 and the first foam supply pipeline 11 are in an open state, the electric valves 15 of the first compressed air foam generating subsystem 5 and the second foam supplying pipeline 12 are in a closed state, and the first compressed air foam generating subsystem 5 is defaulted to preferentially supply foam to the first foam supplying pipeline 11. The second compressed air foam generating subsystem 7 is respectively connected with the first foam supplying pipeline 11 and the second foam supplying pipeline 12, in an initial state, valves of the second compressed air foam generating subsystem 7 and the second foam supplying pipeline 12 are in an open state, valves of the second compressed air foam generating subsystem 7 and the first foam supplying pipeline 11 are in a closed state, and foam is supplied to the second foam supplying pipeline 12 preferentially by the second compressed air foam generating subsystem 7 in a default state. The first compressed air foam generation subsystem 5 is electrically connected to the master control module 8 via a first local control cabinet 13, and the second compressed air foam generation subsystem 7 is electrically connected to the master control module 8 via a second local control cabinet 14.

When a certain fire extinguishing medium generating subsystem breaks down, the fire extinguishing medium generating subsystem capable of working normally supplies bubbles to the first fire monitor 4 and the second fire monitor 6 at the same time, and the all-dimensional coverage of the ignition converter transformer 1 is guaranteed. It should be noted that, under the condition that both the two fire extinguishing systems are normal, because the electric valves 15 of the first compressed air foam generating subsystem 5 and the first foam supplying pipeline 11 are in an open state, and the electric valves 15 of the second compressed air foam generating subsystem 7 and the second foam supplying pipeline 12 are in an open state, the first compressed air foam generating subsystem 5 supplies foam to the first fire monitor 4, the second compressed air foam generating subsystem 7 supplies foam to the second fire monitor 6, and the two fire extinguishing medium generating subsystems disperse the foam supply to ensure the foam amount of the compressed air foam to extinguish fire efficiently, but when a single fire extinguishing medium generating subsystem fails, the spray range covering the whole converter 1 is the most important, and the fire can be extinguished only covering the whole converter 1, and the requirement for the foam amount is secondary, so through the valve switching of the first partition selecting valve 9 and the second partition selecting valve 10, the first 4 and the second 6 fire monitor arranged above the firing converter flow 1 are simultaneously supplied with bubbles by a fire extinguishing medium generating subsystem capable of working properly.

As a further improvement, the first compressed air foam generating subsystem 5 and the second compressed air foam generating subsystem 7 are arranged at positions far from the area where the converter flow 1 is located. In the embodiment, the first compressed air foam generating subsystem 5 is arranged on the pole 1 square running the extra-high voltage converter station, the second compressed air foam generating subsystem 7 is arranged on the pole 2 square running the extra-high voltage converter station, both the pole 1 square and the pole 2 square are far away from the converter 1, the design aims at easily causing explosion to damage pipelines, fire guns and the like when the converter transformer 1 is ignited, if the fire extinguishing medium generating subsystem is close to the converter 1, which easily causes the fire extinguishing medium generating subsystem to be damaged and not to generate foam, the fire extinguishing medium generating subsystem is arranged at a position far away from the converter 1, even if explosion occurs, the fire monitor closest to the ignition converter transformer 1 is damaged, foam generated by the fire extinguishing medium generating subsystem can be supplied to the fire monitor far away from the ignition converter transformer 1 through the pipeline, and the purpose of fire extinguishing is achieved.

The working process of the invention is as follows: as shown in fig. 1, 4 fire-fighting cannons are arranged at intervals on a single-valve-group converter transformer 100, two fire-fighting cannons are correspondingly arranged above every two adjacent converter transformers 1, one fire-fighting cannon is supplied with bubbles through a first compressed air foam generating subsystem 5, the other fire-fighting cannon is supplied with bubbles through a second compressed air foam generating subsystem 7, for example, the first fire-fighting cannon 4 of each pole in fig. 1 is connected with the first compressed air foam generating subsystem 5, the second fire-fighting cannon 6 is connected with the second compressed air foam generating subsystem 7, and the fire-fighting cannons arranged on the cornice of the valve hall 3 can realize the non-differential coverage of each converter transformer 1; the two sets of fire extinguishing medium generating subsystems are respectively arranged on two-pole squares of the ultrahigh voltage converter station.

In order to more intuitively show the fire extinguishing process, as shown in fig. 2, a schematic diagram of the extreme 1 high-end valve group in fig. 1 is given, when the YYA phase change 1 at the end part of the extreme 1 high-end valve group is on fire, the main control module 8 controls and starts two sets of fire extinguishing medium generating subsystems, then, a selection valve chamber automatically opens a partition selection valve where a No. I fire monitor and a No. II fire monitor are located, the partition selection valve is closer to the YYA phase change 1, a first compressed air foam generating subsystem 5 located in the extreme 1 square preferentially provides compressed air foam for the No. I fire monitor right above the cornice of the YYA phase change 1, and a second compressed air foam generating subsystem 7 located in the extreme 2 square provides compressed air foam for the No. II fire monitor.

As shown in fig. 3, a schematic diagram of the pole 2 low-end valve set in fig. 1 is provided, and when the YDB phase converter of the pole 2 low-end valve set catches fire, the fire monitor of # three and # four nearest to the phase is started. The fire monitor is provided with compressed air foam by a second compressed air foam generating subsystem 7 positioned on the polar 2 square, and the fire monitor is provided with compressed air foam by a first compressed air foam generating subsystem 5 positioned on the polar 1 square with a longer distance.

By analogy, as shown in fig. 4, a schematic diagram of the extreme 2 low-end valve set in fig. 1 is given, and when YYC is on fire, the No. two fire monitor and the No. three fire monitor are correspondingly started.

In addition, the invention fully considers the special case of single system fault: for example, when the YDA phase-change flow 1 of the extreme-1 high-end valve group 200 catches fire, a single-system fault occurs when a fire extinguishing system is started or during a fire extinguishing process, and a single-set fire extinguishing medium generating subsystem can simultaneously provide compressed air foam for the # two and the # three fire monitor by opening a pipe valve of an emergency pipeline reserved between two sets of system pipe networks.

Through the technical scheme, the invention provides the fire extinguishing system suitable for operating the extra-high voltage converter station, through setting up two sets of fire extinguishing systems, two sets of fire extinguishing systems's fire gun is the linear arrangement in the single valve group converter transformer 100 top of transporting extra-high voltage converter station, arrange a second fire gun 6 between per two first fire guns 4, first fire gun 4 and second fire gun 6 are controlled respectively to two fire extinguishing systems, two sets of system independent control and provide the fire extinguishing medium for the region of putting out a fire simultaneously, high fire extinguishing efficiency, every two 1 tops of converter transformer correspond have a first fire gun 4 and a second fire gun 6, the fire extinguishing medium of terminal release can cover the converter transformer 1 that catches fire completely, it is effectual to put out a fire, can not destroy and provide the fire extinguishing system that can cover converter 1 fire hazard range completely under the prerequisite of transporting the structure of converter station, be applicable to transporting extra-high voltage converter station.

Example 2

The difference between embodiment 2 of the present invention and embodiment 1 is that:

fire extinguishing systems suitable for being in transporting extra-high voltage converter station still includes first redundant mouth of connecing (not mark in the figure) and the redundant mouth of connecing of second (not mark in the figure), first redundant mouth of connecing is a redundant interface of first confession bubble pipeline 11, and this redundant interface extends to converter flow 1 square region, the redundant mouth of connecing of second supplies bubble pipeline 12's a redundant interface, and this redundant interface extends to converter flow 1 square region, first redundant mouth of connecing is the same with the redundant mouth interface size of second and shape homogeneous phase, and first redundant mouth of connecing is through a manual gate valve 16 and external interface 17 intercommunication, and the redundant interface of second is through another manual gate valve 16 and external interface 17 intercommunication.

The fire extinguishing system suitable for transporting the extra-high voltage converter station further comprises a movable fire-fighting robot 18, the movable fire-fighting robot 18 is connected with a water hose 19, the water hose 19 is provided with a bayonet matched with a first redundant connection port and a second redundant connection port, the bayonet is connected with an external interface 17 in a clamped mode, fire extinguishing media are acquired through the first redundant connection port or the second redundant connection port, and the fire extinguishing system is moved to a preset area to conduct directional fire extinguishing.

As shown in fig. 5 to 7, when the fire monitor fails, the square reserved connection port and the mobile fire-fighting robot are connected through the fire hose, as shown in fig. 1 and 2. When the fire-fighting cannons in the single-valve-group converter 100 are influenced by factors such as external wind environment and the like, and the spraying effect of one cannon is poor, for example, YYA phase converter 1 of the extreme-1 high-end valve group is ignited, the spraying effect of No. I or No. II fire-fighting cannons is poor, the movable fire-fighting robot 18 is connected with a fire-fighting pipeline connection port reserved in the extreme-1 square, namely an external interface 17, and moves to a preset area, so that the YYA phase is extinguished; the YYA phase change current 1 of the extreme 2 high-end valve group is ignited, the spraying effect of the No. I or No. II fire monitor is poor, the movable fire-fighting robot 18 is connected with a fire-fighting pipeline connection port reserved in the extreme 2 square, namely an external interface 17, and moves to a preset area, so that the YYA phase change current 1 is extinguished; the specific effect is shown in fig. 2. The movable fire-fighting robot 18 is a model RXR-M40L-16CA robot manufactured by changtianship fire-fighting equipment limited, njiang.

Example 3

Corresponding to embodiment 2 of the present invention, embodiment 3 of the present invention further provides a fire extinguishing method for a fire extinguishing system for operating an extra-high voltage converter station, the method including:

when a certain converter transformer 1 catches fire, start first foam fire gun fire extinguishing systems and second foam fire gun fire extinguishing systems simultaneously, among first foam fire gun fire extinguishing systems of main control module 8 control and the second foam fire gun fire extinguishing systems apart from catching fire the nearer fire extinguishing systems of converter transformer 1 preferentially to arranging that the converter transformer 1 top supplies the bubble to the fire gun that is close to this converter transformer 1, among first foam fire gun fire extinguishing systems of main control module 8 control and the second foam fire gun fire extinguishing systems apart from catching fire the farther fire converter transformer 1 supplies the bubble to arranging another fire gun above this converter transformer 1. As shown in fig. 1, 4 fire-fighting cannons are arranged at intervals on a single valve group converter transformer 100, two fire-fighting cannons are correspondingly arranged above every two adjacent converter transformers 1, one fire-fighting cannon is supplied with bubbles through a first compressed air foam generation subsystem 5, the other fire-fighting cannon is supplied with bubbles through the first compressed air foam generation subsystem 5, for example, in fig. 1, the first fire-fighting cannon 4 is connected with the first compressed air foam generation subsystem 5, the second fire-fighting cannon 6 is connected with a second compressed air foam generation subsystem 7, and the fire-fighting cannons arranged on the cornice of a valve hall 3 can realize no-difference coverage on each converter transformer 1; the two sets of fire extinguishing medium generating subsystems are respectively arranged on two-pole squares of the ultrahigh voltage converter station.

As shown in fig. 3 and fig. 5 to fig. 7, which only schematically illustrate a fire detector, in practice, two cable-type temperature detectors (not shown) are independently arranged in parallel on a single-valve group converter transformer 100 body, a first temperature detector and a second temperature detector, and 2 flame detectors, namely a first flame detector and a second flame detector, are arranged on a firewall 2 around 1 of each converter. When the first flame detector sends an action signal and the first temperature-sensing detector sends an action signal simultaneously, and the condition of 'two out of three' is met, the combined alarm system sends an acousto-optic alarm signal. If only the flame detector or only the cable type temperature-sensing detector sends out an action signal, the combined alarm system does not give an alarm. Meanwhile, when a certain converter transformer 1 is abnormal, a breaker switch of the single-valve-group converter transformer 100 sends out a response action, the breaker switch is separated, and the valve group is powered off. Audible and visual alarm signals, alarm position signals and circuit breaker switch position division signals are transmitted to the main control module 8, and the main control module 8 starts a fire extinguishing system. The main control module 8 judges that the fire disaster is the high-end valve group 200 of the extreme 1, the main control module 8 controls the first partition selection valve 9 connected with the first compressed air foam generation subsystem 5 to be opened through the first local control cabinet 13, the first compressed air foam generation subsystem 5 is automatically started, and the first compressed air foam generation subsystem 5 supplies foam to the first fire monitor 4, so that the fire monitor closest to the fire-catching converter is used for extinguishing the fire. The activation of the partition selector valve and the activation of the first compressed air foam generating subsystem 5 can be either remotely manual or locally manual. The main control module 8 controls the second partition selection valve 10 connected with the second compressed air foam generation subsystem 7 to be opened through the second local control cabinet 14, the second compressed air foam generation subsystem 7 is automatically started, and the second compressed air foam generation subsystem 7 supplies foam to the second fire monitor 6, so that the fire monitor close to the second position of the ignition converter is used for extinguishing fire. Both the activation of the partition selection valve and the activation of the first extinguishing medium generating subsystem can be done manually remotely or locally. Similarly, the fire control process of the 2 nd high-low valve set is similar, and will not be described herein, and reference can be made to fig. 5 to 7.

When YYA phase change flow 1 of the extreme 1 high-end valve group catches fire, firstly two sets of fire extinguishing medium generating subsystems are started, secondly, a selection valve chamber is automatically opened, a partition selection valve where a first fire monitor and a second fire monitor are located is close to the YYA phase change flow 1, a first compressed air foam generating subsystem 5 located in an extreme 1 square preferentially provides compressed air foam for the second fire monitor right above a cornice of the YYA phase change flow 1, and a second compressed air foam generating subsystem 7 located in an extreme 2 square provides compressed air foam for the first fire monitor. Referring to fig. 1 and fig. 3, when the YDB phase change current 1 of the extreme 2 low end valve group is on fire, the fire monitor No. three and No. four nearest to the phase are started. The fire monitor is provided with compressed air foam by a second compressed air foam generating subsystem 7 positioned on the polar 2 square, and the fire monitor is provided with compressed air foam by a first compressed air foam generating subsystem 5 positioned on the polar 1 square with a longer distance.

By analogy, when YYC is on fire, the fire monitor No. II and No. III are correspondingly started by combining the figure 1 with the figure 4.

Example 4

The embodiment 4 of the present invention is different from the embodiment 3 in that:

when a certain converter transformer 1 catches fire, start first foam fire gun fire extinguishing systems and second foam fire gun fire extinguishing systems simultaneously, if one of them fire extinguishing systems breaks down, the fire extinguishing systems that can normally work in first foam fire gun fire extinguishing systems and the second foam fire gun fire extinguishing systems of master control module 8 control supplies the bubble to corresponding first fire gun 4 and the 6 confession bubble of second fire gun above this converter transformer 1 simultaneously.

As shown in fig. 1, when a certain converter 1 of the extreme-1 high-end valve group 200 is ignited and the first foam fire monitor fire extinguishing system cannot work due to a fault, the first compressed air foam generation subsystem 5 cannot work, the main control module 8 controls the second foam fire monitor fire extinguishing system to start, the second compressed air foam generation subsystem 7 starts, the main control module 8 controls the first partition selection valve 9 and the second partition selection valve 10 to open, and the second compressed air foam generation subsystem 7 supplies foam to the first fire monitor 4 and the second fire monitor 6 at the same time.

When a certain converter of the extreme 1 high-end valve group 200 is ignited, the second foam fire monitor fire extinguishing system cannot work due to faults, the second compressed air foam generation subsystem 7 cannot work, the main control module 8 controls the first foam fire monitor fire extinguishing system to start, the first compressed air foam generation subsystem 5 starts, the main control module 8 controls the first partition selection valve 9 and the second partition selection valve 10 to be opened, and the first compressed air foam generation subsystem 5 supplies foam to the first fire monitor 4 and the second fire monitor 6 simultaneously. For example, when the YDA phase converter 1 of the extreme-1 high-end valve group is on fire, a single-system fault occurs when a fire extinguishing system is started or in the fire extinguishing process, and a single set of fire extinguishing medium generating subsystem can simultaneously provide compressed air foam for No. two and No. three fire monitor by opening a pipe valve of an emergency pipeline reserved between two sets of system pipe networks.

Example 5

when a certain fire monitor extinguishes fire, the spraying effect is not good or the fire extinguishing medium cannot be released due to the fact that the fire extinguishing is affected by external environmental factors, the fire extinguishing medium is acquired through the redundant connecting port of the movable fire-fighting robot 18, which is connected with the first foam fire monitor fire extinguishing system or the second foam fire monitor fire extinguishing system, and the fire extinguishing medium is moved to a preset area to conduct directional fire extinguishing.

As shown in fig. 1 and fig. 2, when the first or second fire monitor in the single valve group converter 100 is affected by factors such as external wind environment, and the spraying effect of one of the fire monitors is not good, for example, the YYA phase converter 1 of the extreme 1 high-end valve group is on fire, the spraying effect of the first or second fire monitor is not good, the movable fire-fighting robot 18 is connected to the fire-fighting pipeline connection port reserved in the extreme 1 square, that is, the first redundant connection port, and moves to a predetermined area, so as to realize fire extinguishing of the YYA phase; the YYA phase change current 1 of the extreme 2 high-end valve group is ignited, the spraying effect of the No. I or No. II fire monitor is poor, the movable fire-fighting robot 18 is connected with a fire-fighting pipeline connection port reserved in the extreme 2 square, namely a second redundant connection port, and moves to a preset area, so that the YYA phase change current 1 is extinguished; the specific effect is shown in fig. 2. The movable fire-fighting robot 18 is a model RXR-M40L-16CA robot manufactured by changtianship fire-fighting equipment limited, njiang.

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

1. A fire extinguishing system suitable for an in-transit ultrahigh voltage converter station is characterized by comprising a first foam fire monitor fire extinguishing system, a second foam fire monitor fire extinguishing system and a master control module, wherein the first foam fire monitor fire extinguishing system comprises at least one first fire monitor and a first compressed air foam generation subsystem, the second foam fire monitor fire extinguishing system comprises at least one second fire monitor and a second compressed air foam generation subsystem, the master control module is respectively connected with the first foam fire monitor fire extinguishing system and the second foam fire monitor fire extinguishing system, a plurality of first fire monitors are arranged above a single-valve-set converter eave of the in-transit ultrahigh voltage converter station in a linear array mode, one second fire monitor is arranged between every two first fire monitors, and one first fire monitor and one second fire monitor correspond to the upper side of every two converter transformers;

the first fire monitor is respectively connected with the first compressed air foam generating subsystem and the second compressed air foam generating subsystem through a first foam supplying pipeline, and the second fire monitor is respectively connected with the first compressed air foam generating subsystem and the second compressed air foam generating subsystem through a second foam supplying pipeline;

when a certain converter transformer catches fire, start first foam fire gun fire extinguishing systems and second foam fire gun fire extinguishing systems simultaneously, the priority of the fire extinguishing systems that becomes nearer apart from the converter transformer that catches fire among first foam fire gun fire extinguishing systems of main control module control and the second foam fire gun fire extinguishing systems is to arranging that this converter transformer top supplies the bubble to the fire gun that becomes nearest apart from this converter transformer, the fire extinguishing systems that the converter transformer far away from catching fire among first foam fire gun fire extinguishing systems of main control module control and the second foam fire gun fire extinguishing systems supplies the bubble to arranging another fire gun above this converter transformer.

2. The fire suppression system for an in-service extra-high voltage converter station of claim 1, wherein the first compressed air foam generation subsystem is electrically connected to the master control module.

3. The fire suppression system for an in-service extra-high voltage converter station of claim 2, wherein the second compressed air foam generation subsystem is electrically connected to the master control module.

4. A fire suppression system suitable for use in an extra-high voltage converter station according to claim 3, wherein the first and second compressed air foam generating subsystems are located remotely from the area of the converter transformer.

5. A fire extinguishing system suitable for an in-service extra-high voltage converter station according to claim 3, wherein the extra-high voltage converter station comprises a plurality of sets of single valve group converter transformers arranged in parallel with each other, each single valve group converter transformer comprises a plurality of converter transformers arranged at equal intervals, adjacent converter transformers are separated by a fire wall, a valve hall is arranged on the rear side of each single valve group converter transformer in parallel, the single valve group converter transformers and the corresponding valve hall integrally form a pole, two poles form a group of poles, each group of poles comprises a high-end valve group and a low-end valve group, two poles in the same group of poles are arranged in mirror symmetry, the low-end valve groups between adjacent groups of poles are arranged back to back or the high-end valve groups are arranged back to back, and a sleeve on the valve hall side of each converter transformer extends into the corresponding valve hall.

6. A fire suppression system adapted for operation at an extra-high voltage converter station according to claim 5, it is characterized in that one end of each single valve group converter flow, which is close to the first compressed air foam generating subsystem and one end of each single valve group converter flow, which is close to the second compressed air foam generating subsystem, is provided with a first zone selection valve and a second zone selection valve, all first fire monitors in the single valve group converter flow are connected with the first zone selection valves through pipelines, all the first zone selection valves in the ultra-high voltage converter station are connected with the first bubble supply pipeline, the second fire monitor in the single-valve group converter is connected with the second zone selection valves through pipelines, all second partition selection valves in the extra-high voltage converter station are connected with the second foam supply pipeline, the first compressed air foam generation subsystem is respectively connected with the first foam supply pipeline and the second foam supply pipeline, and the second compressed air foam generation subsystem is respectively connected with the first foam supply pipeline and the second foam supply pipeline.

7. The fire extinguishing system suitable for operating an extra-high voltage converter station according to claim 6, wherein in an initial state, the valve connected with the first foam supply pipeline of the first compressed air foam generating subsystem is in an open state, and the valve connected with the second foam supply pipeline is in a closed state;

8. The fire extinguishing system suitable for the ultra-high voltage converter station, according to claim 6, wherein the first fire monitor and the second fire monitor are located on the cornice of the valve hall directly above the firewall, the first fire monitor and the second fire monitor are arranged alternately, every two converter transformers correspond to one first fire monitor and one second fire monitor, and when fire is extinguished, the fire extinguishing medium releasing directions of the first fire monitor and the second fire monitor both point to the central position of the corresponding converter transformer.

9. The fire extinguishing system suitable for transporting the extra-high voltage converter station according to claim 3, further comprising a first redundant connection port and a second redundant connection port, wherein the first redundant connection port is a redundant interface of the first bubble supply pipeline, the redundant interface extends to a wide field area of the converter transformer, the second redundant connection port is a redundant interface of the second bubble supply pipeline, the redundant interface extends to the wide field area of the converter transformer, the size and the shape of the first redundant connection port and the second redundant connection port are the same, the first redundant connection port is communicated with the external interface through a manual gate valve, and the second redundant interface is communicated with the external interface through another manual gate valve.

10. The fire extinguishing system suitable for the extra-high voltage converter station in operation according to claim 9, further comprising a movable robot, wherein the movable fire fighting robot is connected with a water hose, the water hose is provided with bayonets matched with the first redundant connection port and the second redundant connection port, the bayonets are clamped with an external interface, fire extinguishing media are obtained through the first redundant connection port or the second redundant connection port, and the movable fire fighting robot moves to a predetermined area to conduct directional fire extinguishing.

11. A method of extinguishing a fire in a fire suppression system operating an extra-high voltage converter station according to any one of claims 1 to 10, characterized in that the method comprises:

12. The fire extinguishing method of the fire extinguishing system suitable for the in-transit extra-high voltage converter station according to claim 11, wherein the in-transit extra-high voltage converter station comprises a pole-1 high-end valve group, the first foam fire monitor fire extinguishing system comprises a first compressed air foam generating subsystem, the second foam fire monitor fire extinguishing system further comprises a second compressed air foam generating subsystem, one end of the pole-1 high-end valve group, which is close to the first compressed air foam generating subsystem and one end of the second compressed air foam generating subsystem, are provided with a first partition selecting valve and a second partition selecting valve, all the first fire monitors are connected with the first partition selecting valve through pipelines, and the second fire monitors are connected with the second partition selecting valve through pipelines;

the main control module judges that the high-end valve group is in an extreme 1 high-end valve group fire, the extreme 1 high-end valve group and the first compressed air foam generating subsystem are both arranged in an extreme 1 square, so that the first compressed air foam generating subsystem is closer to the extreme 1 high-end valve group, the main control module controls a first partition selecting valve connected with the first compressed air foam generating subsystem to be opened, the first compressed air foam generating subsystem is automatically started, the first compressed air foam generating subsystem supplies foam to a first fire monitor, and a fire monitor closest to the firing converter is enabled to extinguish fire.

13. The fire extinguishing method applicable to the fire extinguishing system for operating the extra-high voltage converter station as recited in claim 12, wherein the second compressed air foam generating subsystem is arranged in an extreme 2 square, the second compressed air foam generating subsystem is far from the extreme 1 high-end valve group, the main control module controls a second partition selector valve connected with the second compressed air foam generating subsystem to open, the second compressed air foam generating subsystem is automatically started, and the second compressed air foam generating subsystem supplies foam to the second fire monitor, so that the fire monitor close to the second position of the firing converter is used for extinguishing fire.

14. A method of suppressing a fire in a fire suppression system adapted for operation in an extra-high voltage converter station according to claim 13, further comprising:

15. The fire extinguishing method for the fire extinguishing system of the extra-high voltage converter station according to claim 14, wherein when a converter of the extreme-1 high-end valve group is on fire and the first foam fire monitor fire extinguishing system fails to work due to a fault, the first compressed air foam generating subsystem fails to work, the main control module controls the second foam fire monitor fire extinguishing system to start, the second compressed air foam generating subsystem starts, the main control module controls the first partition selecting valve and the second partition selecting valve to open, and the second compressed air foam generating subsystem supplies foam to the first fire monitor and the second fire monitor simultaneously.

16. The fire extinguishing method for the fire extinguishing system of the extra-high voltage converter station according to claim 14, wherein when a converter of the extreme-1 high-end valve group is on fire and the second foam fire monitor fire extinguishing system is out of operation due to a fault, the second compressed air foam generating subsystem is out of operation, the main control module controls the first foam fire monitor fire extinguishing system to start, the first compressed air foam generating subsystem to start, the main control module controls the first partition selecting valve and the second partition selecting valve to open, and the first compressed air foam generating subsystem supplies foam to the first fire monitor and the second fire monitor simultaneously.

17. A method of suppressing a fire in a fire suppression system adapted for operation in an extra-high voltage converter station according to claim 11, further comprising:

when a certain fire monitor is poor in fire extinguishing effect or fails to release fire extinguishing media, the redundant connecting port for connecting the first foam fire monitor fire extinguishing system or the second foam fire monitor fire extinguishing system through the movable fire-fighting robot obtains the fire extinguishing media, and the movable fire monitor is moved to a preset area to conduct directional fire extinguishing.

18. An operating extra-high voltage converter station with a fire extinguishing system according to any one of claims 1 to 10, characterized by comprising a plurality of sets of single-valve-set converter transformers arranged in parallel with each other, each single-valve-set converter transformer comprises a plurality of converter transformers arranged at equal intervals, adjacent converter transformers are separated by a fire wall, a valve hall is arranged in parallel at the rear side of each single-valve-set converter transformer, at least one compressed air foam generating subsystem and a control module are included, the control module is respectively connected with all the compressed air foam generating subsystems, and the outlets of the compressed air foam generating subsystems are communicated with all the first fire monitor and all the second fire monitor.