阅读说明：本技术 一种扑灭输电线路山火的灭火介质试验装置及试验方法 (Fire extinguishing medium test device and test method for extinguishing forest fire of power transmission line ) 是由 张佳庆 叶良鹏 孙韬 严波 操松元 方登洲 章彬彬 程宜风 于 2021-07-27 设计创作，主要内容包括：本发明公开了一种扑灭输电线路山火的灭火介质试验装置及试验方法,包括箱体、测试导线、耐张绝缘子串、悬垂绝缘子串、短接导线、高压系统、测试接地线、支柱绝缘子、燃烧盘、鼓风系统、喷雾系统、通风系统以及监测控制系统；测试导线通过耐张绝缘子串和悬垂绝缘子串连接在箱体内部,耐张绝缘子串一端为接地端并伸出箱体接地,耐张绝缘子串和悬垂绝缘子串上均设有短接导线,测试导线连接高压系统,测试接地线通过支柱绝缘子设置在箱体内；箱体内设有燃烧盘；箱体上固定鼓风系统、喷雾系统和通风系统。本发明的优点在于,该实验装置实现了灭火水剂在山火条件下对输电线路影响的试验。(The invention discloses a fire extinguishing medium test device and a fire extinguishing medium test method for extinguishing forest fire of a power transmission line, wherein the fire extinguishing medium test device comprises a box body, a test lead, a strain insulator string, a suspension insulator string, a short-circuit lead, a high-voltage system, a test ground wire, a post insulator, a combustion disc, a blowing system, a spraying system, a ventilation system and a monitoring control system; the test lead is connected to the interior of the box body through a strain insulator string and a suspension insulator string, one end of the strain insulator string is a grounding end and extends out of the box body to be grounded, short-circuit leads are arranged on the strain insulator string and the suspension insulator string, the test lead is connected with a high-voltage system, and the test ground lead is arranged in the box body through a post insulator; a burning disc is arranged in the box body; and the box body is fixedly provided with a blowing system, a spraying system and a ventilation system. The experiment device has the advantage that the experiment device realizes the experiment of the influence of the fire extinguishing water agent on the power transmission line under the condition of the mountain fire.)

1. The utility model provides a put out a fire medium test device of transmission line mountain fire which characterized in that: the device comprises a box body, a test lead, a strain insulator string, a suspension insulator string, a short-circuit lead, a high-voltage system, a test grounding wire, a post insulator, a combustion disc, a blowing system, a spraying system, a ventilation system and a monitoring control system;

the testing lead is connected to the interior of the box body through a strain insulator string and a suspension insulator string, one end of the strain insulator string, which is far away from the testing lead, is a grounding end and extends out of the box body to be grounded, short-circuit leads are arranged on the strain insulator string and the suspension insulator string, one end of each short-circuit lead is reliably grounded, and the other end of each short-circuit lead is connected with any insulator steel cap on the insulator string;

the test lead is also connected with a high-voltage system;

the test grounding wire is arranged in the box body through a post insulator capable of vertically lifting, and a grounding end of the test grounding wire extends out of the box body and is grounded;

a combustion disc is also arranged in the box body;

a blowing system, a spraying system and a ventilation system are fixed on the box body;

monitoring control system includes temperature monitoring system, the filthy monitoring system of insulator, spraying laser granularity monitoring system, breakdown current monitoring system and computer control system, temperature monitoring system vertically distributes in the box with horizontal array, the filthy monitoring system of insulator fixes respectively on strain insulator string and the insulator string that dangles, spraying laser granularity monitoring system fixes in the box, breakdown current monitoring system fixes respectively at strain insulator string and test earth connection's earthing terminal, high-voltage system, blower system, spraying system, ventilation system, temperature monitoring system, the filthy monitoring system of insulator, spraying laser granularity monitoring system and breakdown current monitoring system all with the outside computer control system communication connection of box.

2. The fire extinguishing medium test device for extinguishing mountain fire of power transmission line according to claim 1, characterized in that: the spraying system comprises a fire extinguishing medium storage mechanism, a driving mechanism and a sprayer, one end of the fire extinguishing medium storage mechanism is connected with the driving mechanism, the other end of the fire extinguishing medium storage mechanism extends into the box body for the output end and is connected with the sprayer, the spraying laser granularity monitoring system is fixed on the inner walls of the box bodies on two sides of a spraying path of the sprayer, the driving mechanism is in communication connection with the computer control system and drives the driving mechanism to enable the fire extinguishing medium of the fire extinguishing medium storage mechanism to be sprayed out from the sprayer.

3. The fire extinguishing medium test device for extinguishing mountain fire of the power transmission line according to claim 2, characterized in that: the spray head is a rotatable spray head.

4. The fire extinguishing medium test device for extinguishing mountain fire of power transmission line according to claim 1, characterized in that: the high-voltage system is a high-voltage generator.

5. The fire extinguishing medium test device for extinguishing mountain fire of power transmission line according to claim 1, characterized in that: the air blowing system comprises two air blowers which are respectively fixed on two sides of the box body.

6. The fire extinguishing medium test device for extinguishing mountain fire of power transmission line according to claim 1, characterized in that: the ventilation system is fixed on the top of the box body.

7. The fire extinguishing medium test device for extinguishing mountain fire of power transmission line according to claim 1, characterized in that: an observation window is arranged on the box body.

8. The fire extinguishing medium test device for extinguishing mountain fire of power transmission line according to claim 1, characterized in that: the post insulator is fixed in the box body through a lifting cylinder.

9. An experimental method adopting the fire extinguishing medium test device for extinguishing the forest fire of the power transmission line as claimed in any one of claims 1 to 8, is characterized in that: the method is used for testing the influence of fire extinguishing medium on the breakdown of the test lead on the test grounding wire, and specifically comprises the following steps:

step 1: removing short-circuit leads on the strain insulator string and the suspension insulator string, and adjusting the lifting of the post insulator to enable the test ground wire to meet the test height;

step 2: igniting combustible materials in the combustion disc, and starting and adjusting a blast system to meet the test wind speed through a computer control system;

and step 3: starting and adjusting the high-voltage system to meet the test voltage grade through the computer control system until the test lead performs breakdown discharge on the test grounding wire, recording breakdown voltage, breakdown current, breakdown distance, wind speed and temperature distribution signals inside the box body through the high-voltage system, the temperature monitoring system and the breakdown current monitoring system, and transmitting the distribution signals to the computer control system;

and 4, step 4: after the computer control system receives the recorded distribution signals, the computer control system starts a ventilation system to exhaust the smoke in the box body;

and 5: after the steps 1 to 4 are repeated, starting the spraying system through the computer control system, recording the insulator pollution degree and the fog drop parameters through the insulator pollution monitoring system and the spraying laser granularity monitoring system, and transmitting the distribution signals to the computer control system;

step 6: and (5) repeating the steps 1 to 5 by adjusting the spraying parameters, the spraying direction, the type of the fire extinguishing medium and the temperature in the box body when the spraying is started, and performing a plurality of groups of comparison tests.

10. An experimental method adopting the fire extinguishing medium test device for extinguishing the forest fire of the power transmission line as claimed in any one of claims 1 to 8, is characterized in that: the method is used for testing the influence of fire extinguishing medium on insulator flashover breakdown, and specifically comprises the following steps:

step 1: adjusting the connecting positions of the short-circuit lead and the insulator steel caps on the strain insulator string and the suspension insulator string respectively until the testing positions are met, and adjusting the lifting of the post insulator to enable the testing ground wire to meet the testing height;

step 2: igniting combustible materials in the combustion disc, and starting and adjusting a blast system to meet the test wind speed through a computer control system;

and step 3: starting and adjusting the high-voltage system to meet the test voltage grade through the computer control system until the test lead performs breakdown discharge on the test ground wire, recording breakdown voltage, breakdown current, the number of breakdown insulator pieces, wind speed and a temperature distribution signal in the box body through the high-voltage system, the temperature monitoring system and the breakdown current monitoring system, and transmitting the distribution signal to the computer control system;

and 4, step 4: after the computer control system receives the recorded distribution signals, the computer control system starts a ventilation system to exhaust the smoke in the box body;

and 5: after the steps 1 to 4 are repeated, starting the spraying system through the computer control system, recording the insulator pollution degree and the fog drop parameters through the insulator pollution monitoring system and the spraying laser granularity monitoring system, and transmitting the distribution signals to the computer control system;

step 6: and (5) repeating the steps 1 to 5 by adjusting the spraying parameters, the spraying direction, the type of the fire extinguishing medium and the temperature in the box body when the spraying is started, and performing a plurality of groups of comparison tests.

Technical Field

The invention relates to the technical field of electrical fire, in particular to a fire extinguishing medium test device and a test method for extinguishing forest fire of a power transmission line.

Background

The economic development leads to the continuous increase of power demand, the corresponding rapid development of power construction, the gradual improvement of voltage grade and the continuous increase of power transmission capacity, and China becomes one of the countries with the highest alternating current and direct current transmission voltage grade in the world.

The number of times of mountain fire outbreak caused by seasonal climate problems is in an increasing trend, mountain fire is easily caused by habitually putting off a large number of fireworks and crackers or burning paper money in periodic traditional festivals such as spring festival, clearness festival and winter solstice, the mountain fire is easy to occur due to continuous drought, large-area straw burning in crop harvesting season can cause tripping if the mountain fire or straw burning fire spreads to the vicinity of an overhead transmission line, most of the mountain fire or straw burning fire can cause power failure accidents due to reclosure failure, the recovery difficulty is high, huge economic loss and social negative effects are caused, and therefore, the mountain fire of the transmission line is extinguished by using water or other fire extinguishing media, and the method is a necessary means for avoiding the electric transmission line from tripping due to discharge of the mountain fire.

The Chinese invention patent publication No. CN103432700A discloses a method for quickly extinguishing mountain fire along a power transmission line, which adopts a mode that a high-pressure water mist fire extinguisher carries a commercial fire extinguishing agent to extinguish the mountain fire along the power transmission line, and has the advantages of strong maneuverability and high fire extinguishing efficiency; the Chinese patent publication No. CN110639147A discloses a power transmission line forest fire aviation fire extinguishing device, which adopts a fire extinguishing water agent carried on a helicopter body to extinguish fire, and has large carrying capacity and flexible use. Although the water-spraying fire extinguishing agent is a fire extinguishing mode with high mountain fire extinguishing efficiency, the application of the electrified water fire extinguishing technology needs to firstly study the influence of a fire extinguishing agent on a power transmission line under the condition of mountain fire, whether the water mist generated by spraying mixes hot smoke and hot free air and further causes ground discharge tripping and insulator wet pollution flashover tripping in a transmission line or not, and how to select a proper fire extinguishing medium, so that the problem needs to be considered emphatically when the mountain fire of the power transmission line is extinguished.

Disclosure of Invention

The invention aims to solve the technical problem of how to provide a test device for testing the influence of a fire extinguishing water agent on a power transmission line under a mountain fire condition.

In order to solve the technical problems, the invention provides the following technical scheme:

a fire extinguishing medium test device for extinguishing forest fire of a power transmission line comprises a box body, a test lead, a strain insulator string, a suspension insulator string, a short-circuit lead, a high-voltage system, a test grounding wire, a post insulator, a combustion disc, a blast system, a spraying system, a ventilation system and a monitoring control system;

the testing lead is connected to the interior of the box body through a strain insulator string and a suspension insulator string, one end of the strain insulator string, which is far away from the testing lead, is a grounding end and extends out of the box body to be grounded, short-circuit leads are arranged on the strain insulator string and the suspension insulator string, one end of each short-circuit lead is reliably grounded, and the other end of each short-circuit lead is connected with any insulator steel cap on the insulator string;

the test lead is also connected with a high-voltage system;

the test grounding wire is arranged in the box body through a post insulator capable of vertically lifting, and a grounding end of the test grounding wire extends out of the box body and is grounded;

a combustion disc is also arranged in the box body;

a blowing system, a spraying system and a ventilation system are fixed on the box body;

monitoring control system includes temperature monitoring system, the filthy monitoring system of insulator, spraying laser granularity monitoring system, breakdown current monitoring system and computer control system, temperature monitoring system vertically distributes in the box with horizontal array, the filthy monitoring system of insulator fixes respectively on strain insulator string and the insulator string that dangles, spraying laser granularity monitoring system fixes in the box, breakdown current monitoring system fixes respectively at strain insulator string and test earth connection's earthing terminal, high-voltage system, blower system, spraying system, ventilation system, temperature monitoring system, the filthy monitoring system of insulator, spraying laser granularity monitoring system and breakdown current monitoring system all with the outside computer control system communication connection of box.

The device comprises a high-voltage system, a combustion disc, a blowing system, a spray system, a temperature monitoring system, an insulator pollution monitoring system, a spray laser granularity monitoring system and a breakdown current monitoring system, wherein the high-voltage system is used for simulating voltages of different levels when a line runs, the combustion disc is used for simulating the influence of combustible combustion on a power transmission line, the blowing system is used for simulating the influence of wind speed on combustion under a natural environment, the spray system is used for testing the tripping influence of a fire extinguishing medium on the power transmission line under the condition of a fire scene, the spraying system can be used for testing the wet pollution flashover condition of an insulator string, and the temperature monitoring system, the insulator pollution monitoring system, the spray laser granularity monitoring system and the breakdown current monitoring system are used for recording breakdown voltage, breakdown current, breakdown distance, the number of breakdown insulator pieces, wind speed, insulator pollution degree, droplet parameters and box body internal temperature distribution signals, so that the fire extinguishing agent can realize the test on the influence of the power transmission line under the condition of mountain fire.

Preferably, the spraying system comprises a fire extinguishing medium storage mechanism, a driving mechanism and a nozzle, one end of the fire extinguishing medium storage mechanism is connected with the driving mechanism, the other end of the fire extinguishing medium storage mechanism extends into the box body for the output end and is connected with the nozzle, the spraying laser granularity monitoring system is fixed on the inner walls of the box body at two sides of the spraying path of the nozzle, the driving mechanism is in communication connection with a computer control system and drives the driving mechanism to enable the fire extinguishing medium of the fire extinguishing medium storage mechanism to be sprayed out from the nozzle.

Preferably, the spray head is a rotatable spray head.

Preferably, the high voltage system is a high voltage generator.

Preferably, the blower system is two blowers, and the two blowers are respectively fixed on two sides of the box body.

Preferably, the ventilation system is fixed to the top of the cabinet.

Preferably, an observation window is arranged on the box body.

Preferably, the post insulator is fixed in the box body through a lifting cylinder.

Preferably, the invention also provides an experimental method of the fire extinguishing medium test device for extinguishing the forest fire of the power transmission line, which is used for testing the influence of the fire extinguishing medium on the breakdown of the test lead on the test ground wire, and the experimental method specifically comprises the following steps:

step 1: removing short-circuit leads on the strain insulator string and the suspension insulator string, and adjusting the lifting of the post insulator to enable the test ground wire to meet the test height;

step 2: igniting combustible materials in the combustion disc, and starting and adjusting a blast system to meet the test wind speed through a computer control system;

and step 3: starting and adjusting the high-voltage system to meet the test voltage grade through the computer control system until the test lead performs breakdown discharge on the test grounding wire, recording breakdown voltage, breakdown current, breakdown distance, wind speed and temperature distribution signals inside the box body through the high-voltage system, the temperature monitoring system and the breakdown current monitoring system, and transmitting the distribution signals to the computer control system;

and 4, step 4: after the computer control system receives the recorded distribution signals, the computer control system starts a ventilation system to exhaust the smoke in the box body;

and 5: after the steps 1 to 4 are repeated, starting the spraying system through the computer control system, recording the insulator pollution degree and the fog drop parameters through the insulator pollution monitoring system and the spraying laser granularity monitoring system, and transmitting the distribution signals to the computer control system;

step 6: and (5) repeating the steps 1 to 5 by adjusting the spraying parameters, the spraying direction, the type of the fire extinguishing medium and the temperature in the box body when the spraying is started, and performing a plurality of groups of comparison tests.

Preferably, the invention also provides an experimental method of the fire extinguishing medium test device for extinguishing the forest fire of the power transmission line, which is used for testing the influence of the fire extinguishing medium on the flashover breakdown of the insulator, and specifically comprises the following steps:

step 1: adjusting the connecting positions of the short-circuit lead and the insulator steel caps on the strain insulator string and the suspension insulator string respectively until the testing positions are met, and adjusting the lifting of the post insulator to enable the testing ground wire to meet the testing height;

step 2: igniting combustible materials in the combustion disc, and starting and adjusting a blast system to meet the test wind speed through a computer control system;

and step 3: starting and adjusting the high-voltage system to meet the test voltage grade through the computer control system until the test lead performs breakdown discharge on the test ground wire, recording breakdown voltage, breakdown current, the number of breakdown insulator pieces, wind speed and a temperature distribution signal in the box body through the high-voltage system, the temperature monitoring system and the breakdown current monitoring system, and transmitting the distribution signal to the computer control system;

and 4, step 4: after the computer control system receives the recorded distribution signals, the computer control system starts a ventilation system to exhaust the smoke in the box body;

and 5: after the steps 1 to 4 are repeated, starting the spraying system through the computer control system, recording the insulator pollution degree and the fog drop parameters through the insulator pollution monitoring system and the spraying laser granularity monitoring system, and transmitting the distribution signals to the computer control system;

step 6: and (5) repeating the steps 1 to 5 by adjusting the spraying parameters, the spraying direction, the type of the fire extinguishing medium and the temperature in the box body when the spraying is started, and performing a plurality of groups of comparison tests.

Compared with the prior art, the invention has the beneficial effects that:

the device comprises a high-voltage system, a combustion disc, a blowing system, a spray system, a temperature monitoring system, an insulator pollution monitoring system, a spray laser granularity monitoring system and a breakdown current monitoring system, wherein the high-voltage system is used for simulating voltages of different levels when a line runs, the combustion disc is used for simulating the influence of combustible combustion on a power transmission line, the blowing system is used for simulating the influence of wind speed on combustion under a natural environment, the spray system is used for testing the tripping influence of a fire extinguishing medium on the power transmission line under the condition of a fire scene, the spraying system can be used for testing the wet pollution flashover condition of an insulator string, and the temperature monitoring system, the insulator pollution monitoring system, the spray laser granularity monitoring system and the breakdown current monitoring system are used for recording breakdown voltage, breakdown current, breakdown distance, the number of breakdown insulator pieces, wind speed, insulator pollution degree, droplet parameters and box body internal temperature distribution signals, so that the fire extinguishing agent can realize the test on the influence of the power transmission line under the condition of mountain fire.

Drawings

Fig. 1 is a schematic structural diagram of a fire extinguishing medium test device for extinguishing a mountain fire of a power transmission line according to an embodiment of the invention.

Detailed Description

In order to facilitate the understanding of the technical solutions of the present invention for those skilled in the art, the technical solutions of the present invention will be further described with reference to the drawings attached to the specification.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless explicitly stated or limited otherwise, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1, the embodiment discloses a fire extinguishing medium test device for extinguishing a mountain fire of a power transmission line, which comprises a box body 1, a test lead 2, a strain insulator string 3, a suspension insulator string 4, a short-circuit lead 5, a high-voltage system 6, a test grounding wire 7, a post insulator 8, a combustion disc 9, a blower system 10, a spraying system 11, a ventilation system 12 and a monitoring control system.

The test lead 2 is connected to the inside of the box body 1 through a strain insulator string 3 and a suspension insulator string 4, one end of the strain insulator string 3, which is far away from the test lead 2, is a grounding end and extends out of the box body 1 to be grounded, in the embodiment, the test lead 2 adopts a JL/G2A-400/35 steel-cored aluminum strand; and the strain insulator string 3 and the suspension insulator string 4 are respectively provided with a short circuit lead 5, one end of the short circuit lead 5 is reliably grounded, and the other end of the short circuit lead is connected with any one insulator steel cap on the insulator string and used for adjusting the effective length of the insulator string.

The test lead 2 is also connected with a high-voltage system 6 arranged outside the box body 1; in this embodiment, the high voltage system 6 is a high voltage generator, has a voltage adjustment range of 0-500kV and a current adjustment range of 0-10A, and is used for simulating different levels of voltages when a line runs.

The test grounding wire 7 is arranged in the box body 1 through a post insulator 8 capable of vertically lifting, a grounding end of the test grounding wire 7 extends out of the box body 1 to be grounded, and in the embodiment, the short-circuit lead 5 and the test grounding wire 7 both adopt JL/G1A-240/30 steel-cored aluminum stranded wires.

Specifically, in the present embodiment, the post insulator 8 is fixed in the box 1 by the lifting cylinder 14, and the distance between the test ground wire 7 and the test lead 2 is adjusted by the lifting of the lifting cylinder 14.

And a combustion disc 9 is further fixed at the bottom in the box body 1 and used for simulating the influence of combustible combustion on the power transmission line.

The box body 1 is fixed with a blowing system 10, a spraying system 11 and a ventilation system 12.

The air blowing system 10 is composed of two air blowers which are respectively fixed on two sides of the box body 1, and the air speed and the air direction can be adjusted, the maximum air speed is 20m/s, and the air blowing system is used for simulating the influence of the air speed on combustion in a natural environment.

The spraying system 11 comprises a fire extinguishing medium storage mechanism 1101, a driving mechanism 1102 and a spray head 1103, one end of the fire extinguishing medium storage mechanism 1101 is connected with the driving mechanism 1102, the other end of the fire extinguishing medium storage mechanism 1101 is an output end which extends into the box body 1 and is connected with the spray head 1103, the driving mechanism 1102 is in communication connection with a monitoring control system and drives the driving mechanism 1102, and fire extinguishing medium of the fire extinguishing medium storage mechanism 1101 is sprayed out from the spray head 1103. Further, the extinguishing medium accessible experiment demand in the extinguishing medium storage mechanism 1101 is adjusted, realizes the arbitrary form combination that can spray water and different fire extinguishing agents, shower nozzle 1103 is rotatable shower nozzle to adjustable spraying direction and extinguishing medium atomizing degree for extinguishing medium is to transmission line tripping operation influence under the test scene of a fire condition, and can be used to test insulator chain wet pollution flashover condition.

Further, the ventilation system 12 is fixed on the top of the box body 1 and used for ventilation and smoke exhaust of the box body 1 during a test; in the embodiment, the ventilation system 12 has a diameter of 320mm and a maximum ventilation volume of 1200m³A/h exhaust fan.

Still further, an observation window 101 is provided on the box body 1, and a high-speed camera (not shown) is further fixed on the observation window 101.

The monitoring control system comprises a temperature monitoring system 1301, an insulator contamination monitoring system 1302, a spray laser granularity monitoring system 1303, a breakdown current monitoring system 1304 and a computer control system 1305, wherein the temperature monitoring system 1301 is longitudinally and transversely distributed in the box body in an array manner, and in the embodiment, the temperature monitoring system 1301 is a thermocouple; insulator filth monitoring system 1302 is fixed respectively on strain insulator string 34 and the insulator string 4 that dangles, spraying laser particle size monitoring system 1303 is fixed on the spraying route both sides box 1 inner wall of shower nozzle 1103, breakdown current monitoring system 1304 is fixed respectively at strain insulator string 3 and the earthing terminal of test earth connection 7, high voltage system 6, blower system 10, actuating mechanism 1102, ventilation system 12, temperature monitoring system 1301, insulator filth monitoring system 1302, spraying laser particle size monitoring system 1303 and breakdown current monitoring system 1304 all with box 1 outside computer control system 1304 communication connection.

The high-voltage system 6 is used for simulating voltages of different levels when a line runs, the combustion disc 9 is used for simulating the influence of combustible combustion on a power transmission line, the air blowing system 10 is used for simulating the influence of wind speed on combustion under natural environment, the spraying system 11 is used for testing the influence of a fire extinguishing medium on the tripping of the power transmission line under the condition of a fire scene, the high-voltage system can be used for testing the wet pollution flashover condition of an insulator string, and the temperature monitoring system 1301, the insulator pollution monitoring system 1302, the spraying laser granularity monitoring system 1303 and the breakdown current monitoring system 1304 are used for recording breakdown voltage, breakdown current, breakdown distance, the number of breakdown insulator pieces, wind speed, the insulator pollution degree, fog drop parameters and box internal temperature distribution signals, so that the test of the influence of a fire extinguishing agent on the power transmission line under the condition of mountain fire is realized.

Specifically, this embodiment also discloses an experimental method for testing the influence of fire extinguishing medium on the test lead 2 to the breakdown of the test ground wire 7, and specifically includes the following steps:

step 1: removing the short-circuit lead 5 on the strain insulator string 3 and the suspension insulator string 4, and adjusting the lifting of the post insulator 8 to enable the distance between the test grounding wire 7 and the test lead 2 to be 2 m;

step 2: igniting the combustible in the combustion disc 9 to enable the average temperature in the box body 1 to reach 400 ℃, and starting and adjusting the air blowing system 10 through the computer control system 1305 to enable the air speed to be 8 m/h;

and step 3: starting and adjusting the high-voltage system 6 to meet the test voltage level through the computer control system 1305 until the test lead 2 breaks down and discharges the test grounding wire 7, recording breakdown voltage, breakdown current, breakdown distance, wind speed and temperature distribution signals in the box body 1 through the high-voltage system 6, the temperature monitoring system 1301 and the breakdown current monitoring system 1304, and transmitting the distribution signals to the computer control system 1305;

and 4, step 4: after the computer control system 1305 receives the recorded distribution signal, the ventilation system 12 is started through the computer control system 13305 to exhaust the smoke in the box body 1;

and 5: after repeating the steps 1 to 4, starting the spraying system 11 through the computer control system 1305, recording the pollution degree and the droplet parameters of the insulator through the insulator pollution monitoring system 1302 and the spraying laser granularity monitoring system 1303, and transmitting the distribution signals to the computer control system 1305;

step 6: and repeating the steps 1 to 5 by adjusting the spraying parameters, the spraying direction, the type of the fire extinguishing medium and the temperature in the box body 1 at the beginning of spraying, and performing a plurality of groups of comparison tests.

Based on the steps, the embodiment further discloses an experimental method for testing the influence of the fire extinguishing medium on the insulator flashover breakdown, which specifically comprises the following steps:

step 1: respectively adjusting the connecting positions of the short-circuit lead 5 and the insulator steel caps on the strain insulator string 3 and the suspension insulator string 4 until the testing positions are met, and adjusting the lifting of the post insulator 8 to enable the distance between the testing ground lead 7 and the testing lead 2 to be 2 m;

step 2: igniting the combustible in the combustion disc 9 to enable the average temperature in the box body 1 to reach 400 ℃, and starting and adjusting the air blowing system 10 through the computer control system 1305 to enable the air speed to be 8 m/h;

and step 3: starting and adjusting the high-voltage system 6 to meet the test voltage level through the computer control system 1305 until the test lead 2 breaks down and discharges the test grounding wire 7, recording breakdown voltage, breakdown current, the number of broken-down insulator pieces, wind speed and the distribution signal of the internal temperature of the box body through the high-voltage system 6, the temperature monitoring system 1301 and the breakdown current monitoring system 1304, and transmitting the distribution signal to the computer control system 1305;

and 4, step 4: after the computer control system 1305 receives the recorded distribution signal, the ventilation system 12 is started through the computer control system 13305 to exhaust the smoke in the box body 1;

and 5: after repeating the steps 1 to 4, starting the spraying system 11 through the computer control system 1305, recording the pollution degree and the droplet parameters of the insulator through the insulator pollution monitoring system 1302 and the spraying laser granularity monitoring system 1303, and transmitting the distribution signals to the computer control system 1305;

step 6: and repeating the steps 1 to 5 by adjusting the spraying parameters, the spraying direction, the type of the fire extinguishing medium and the temperature in the box body 1 at the beginning of spraying, and performing a plurality of groups of comparison tests.

Through the steps, the experiment for testing the influence of the fire extinguishing medium on the breakdown of the test grounding wire 7 by the test lead 2 and the influence of the fire extinguishing medium on the flashover breakdown of the insulator is realized, and further, the experiment for testing the influence of the fire extinguishing water agent on the power transmission line under the condition of mountain fire is realized.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

The above-mentioned embodiments only represent embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the concept of the present invention, and these embodiments are all within the protection scope of the present invention.