阅读说明：本技术 一种模块化多电平换流器温度在线监测系统 (Temperature online monitoring system of modular multilevel converter ) 是由 李渊 于 2019-10-28 设计创作，主要内容包括：本发明公开了一种模块化多电平换流器温度在线监测系统,包括监测主体与总控箱,所述监测主体与总控箱通信连接,所述监测主体的上端外表面插接有顶盖,所述监测主体的前端外表面固定安装有散热箱；所述散热箱的前端外表面设置有第一风扇、第二风扇与第三风扇,所述第一风扇设置在散热箱的前端外表面靠近一侧的位置,所述第三风扇设置在散热箱的前端外表面靠近另一侧的位置,所述第二风扇设置在散热箱的前端外表面中间位置；所述监测主体的一侧外表面开设有辅助散热口；本发明的有益效果是,具备了更好的监测效果,可以更好的保护模块化多电平换流器,并且让该系统具备了更多功能。(The invention discloses a temperature online monitoring system of a modular multilevel converter, which comprises a monitoring main body and a master control box, wherein the monitoring main body is in communication connection with the master control box; the first fan is arranged at the position, close to one side, of the outer surface of the front end of the heat dissipation box, the third fan is arranged at the position, close to the other side, of the outer surface of the front end of the heat dissipation box, and the second fan is arranged in the middle of the outer surface of the front end of the heat dissipation box; an auxiliary heat dissipation port is formed in the outer surface of one side of the monitoring main body; the invention has the advantages of better monitoring effect, better protection of the modular multilevel converter and more functions of the system.)

1. The temperature online monitoring system of the modular multilevel converter comprises a monitoring main body (1) and a master control box, and is characterized in that the monitoring main body (1) is in communication connection with the master control box, a top cover (2) is inserted into the outer surface of the upper end of the monitoring main body (1), and a heat dissipation box (3) is fixedly installed on the outer surface of the front end of the monitoring main body (1);

a first fan (4), a second fan (5) and a third fan (6) are arranged on the outer surface of the front end of the heat dissipation box (3), the first fan (4) is arranged at a position, close to one side, of the outer surface of the front end of the heat dissipation box (3), the third fan (6) is arranged at a position, close to the other side, of the outer surface of the front end of the heat dissipation box (3), and the second fan (5) is arranged in the middle of the outer surface of the front end of the heat dissipation box (3);

an auxiliary heat dissipation port (7) is formed in the outer surface of one side of the monitoring main body (1), a motor box (8) is fixedly installed at the position, close to the lower end, of the outer surface of one side of the monitoring main body (1), a sealing plate (9) is arranged between every two adjacent groups of motor boxes (8), a motor (801) is arranged inside each motor box (8), and a braking shaft of each motor (801) is fixedly connected with each sealing plate (9);

the monitoring device is characterized in that a wiring hole (10) is formed in the outer surface of the rear end of the monitoring main body (1), a voltage sensor (18) is arranged in the wiring hole (10), and an electronic switch (11) is fixedly mounted at a position, close to one side, of the outer surface of the rear end of the monitoring main body (1);

a first temperature sensor (12) is fixedly mounted on the outer surface of the lower end of the top cover (2), a second temperature sensor (13) is fixedly mounted at a position, close to one side, inside the monitoring main body (1), a third temperature sensor (14) is fixedly mounted at a position, close to the other side, inside the monitoring main body (1), a tray (15) is arranged at the bottom end inside the monitoring main body (1), a lifting rod (16) is welded at the middle position of the outer surface of the upper end of the tray (15), and a sealing block (17) is arranged on the outer surface of the upper end of the top cover (2);

the master control box comprises a data receiving module, a data processing module, a master control module and an information sending module;

the data receiving module is used for receiving first temperature information acquired by a first temperature sensor (12), second temperature information acquired by a second temperature sensor (13), third temperature information acquired by a third temperature sensor (14) and voltage information acquired by a voltage sensor (18);

the data processing module is used for processing the first temperature information, the second temperature information and the third temperature into first temperature control information, second temperature control information, third temperature control information, total temperature control information and alarm information, and processing the voltage information into power failure information;

the total control module is used for controlling the information sending module to convert first temperature control information into a first temperature control instruction to be sent to the first fan (4), convert second temperature control information into a second temperature control instruction to be sent to the second fan (5), convert the third temperature control information into a second temperature control instruction to be sent to the third fan (6), convert alarm information into an alarm instruction to be sent to an intelligent mobile terminal of a user, convert total temperature control information into a total control instruction to be sent to the first fan (4), the second fan (5), the third fan (6) and the motor (801), and convert power failure information into a power failure instruction to the electronic switch (11).

2. The modular multilevel converter temperature online monitoring system according to claim 1, characterized in that a threaded hole (201) is formed in the middle position of the outer surface of the upper end of the top cover (2), an auxiliary rod (202) is bolted to the inside of the threaded hole (201), and the auxiliary rod (202) penetrates through one end of the threaded hole (201) and is in threaded connection with the top end of the lifting rod (16).

3. The on-line temperature monitoring system for the modular multilevel converter according to claim 1, wherein the number of the first fan (4), the second fan (5) and the third fan (6) is two, the first fan (4), the second fan (5) and the third fan (6) are symmetrically arranged, and the second fan (5) is arranged between the first fan (4) and the third fan (6).

4. The modular multilevel converter temperature online monitoring system according to claim 1, wherein auxiliary sealing blocks (901) are fixedly installed on the outer surface of the upper end of the sealing plate (9), the number of the auxiliary sealing blocks (901) and the number of the auxiliary heat dissipation ports (7) are four, the auxiliary sealing blocks (901) and the auxiliary heat dissipation ports (7) are arranged in parallel at equal intervals, and the auxiliary sealing blocks (901) and the auxiliary heat dissipation ports (7) are matched with each other.

5. The modular multilevel converter temperature online monitoring system according to claim 1, wherein a first connecting groove (101) is formed in an outer surface of an upper end of the monitoring body (1), a first clamping groove (102) is formed in a bottom end of the first connecting groove (101), a first connecting block (171) is inserted into the first connecting groove (101), a first clamping block (172) is inserted into the first clamping groove (102), the first clamping block (172) is welded to a lower end of the first connecting block (171), and an upper end of the first connecting block (171) is welded to the sealing block (17).

6. The modular multilevel converter temperature online monitoring system according to claim 1, wherein a second connecting groove (203) is formed in an inner surface of the top cover (2), a second clamping groove (204) is formed at a bottom end of the second connecting groove (203), a second connecting block (173) is inserted into the second connecting groove (203), a second clamping block (174) is inserted into the second clamping groove (204), the second clamping block (174) is welded to a lower end of the second connecting block (173), and an upper end of the second connecting block (173) is welded to the sealing block (17).

7. The modular multilevel converter temperature online monitoring system according to claim 1, wherein the specific processing procedure of the first temperature control information is as follows: setting a preset first threshold A1, marking temperature information collected by a first temperature sensor (12) as Wt1, and generating first temperature control information when Wt1 is greater than a first threshold A1;

the specific processing procedure of the second temperature control information is as follows: setting a preset second threshold A2, marking the temperature information collected by the second temperature sensor (13) as Wt2, and generating second temperature control information when Wt2 is greater than the second threshold A2;

the specific processing procedure of the third temperature control information is as follows: setting a preset third threshold A3, marking the temperature information collected by the second temperature sensor (13) as Wt3, and generating third temperature control information when Wt3 is greater than the third threshold A3;

the specific processing process of the total control information is as follows: when the real-time acquired Wt1 is greater than a first threshold A1, the real-time acquired Wt2 is greater than a second threshold A2 and the real-time acquired Wt3 is greater than a third threshold A3, the generated first temperature control information, the generated second temperature control information and the generated third temperature control information are simultaneously converted into total control information;

the specific processing procedure of the alarm information is as follows: after the first fan (4), the second fan (5) and the third fan (6) run for a preset time, the first temperature sensor (12), the second temperature sensor (13) and the third temperature sensor (14) acquire temperature information of the modular multilevel converter in the monitoring device again, the temperature information is marked as B1, B2 and B3, a difference Ba1 between B1 and a first threshold A1, a difference Ba2 between B2 and a second threshold A2 and a difference Ba3 between B3 and a third threshold A3 are calculated, and when any one of Ba1, Ba2 and Ba3 exceeds a preset value, alarm information is generated.

8. The system according to claim 1, wherein the specific processing procedure of the power failure information is as follows: (ii) a

The method comprises the following steps: marking the voltage information collected by the voltage sensor (18) as Bt;

step two: the voltage sensor (18) can continuously acquire X times of voltage within a preset time period, wherein X is more than 3 and less than or equal to K, and K is 4 … … n;

step three: when BtX continuous M times is larger than the preset value, the power-off information is generated, M is more than 2 and less than or equal to K-1, and K is 4 … … n.

Technical Field

The invention relates to a monitoring system, in particular to a temperature online monitoring system of a modular multilevel converter, and belongs to the technical field of temperature monitoring application.

Background

The Chinese patent with publication number CN105146703A discloses a heating control and temperature monitoring system for a natural gas tobacco flue-curing house, wherein the tobacco flue-curing house comprises a hot air chamber provided with a heating device and a tobacco flue-curing chamber provided with a tobacco hanging frame, a circulating flue is formed between the tobacco flue-curing chamber and the hot air chamber through an air inlet and an air return port, and the heating device is connected with a heat exchange tube; the heating device is a natural gas fuel heating device; the heating device comprises a natural gas storage tank, a first gas transmission pipeline, a second gas transmission pipeline, an electromagnetic valve and a heater, the heater is connected with the heat exchange tube, and the natural gas storage tank is connected with the heater through the first gas transmission pipeline, the electromagnetic valve and the second gas transmission pipeline; the heating control and temperature monitoring system comprises a component communication element, a control element and a terminal, wherein the terminal is electrically connected with the control element through the component communication element, and the control element is electrically connected with a control end of the electromagnetic valve; the heating control and temperature monitoring system also comprises a temperature data acquisition element arranged in the tobacco flue-curing house, and the temperature data acquisition element is connected with the control element; but its monitoring effect is not good enough, and the function is comparatively single.

The existing temperature online monitoring system is single in acquired data, the acquired data during monitoring are not accurate enough, the monitoring effect of the system is poor, the existing temperature online monitoring system only has the monitoring temperature function, the single function cannot meet the use requirement of a user, and certain influence is brought to the use of the temperature online monitoring system.

Disclosure of Invention

The invention aims to solve the problems that the existing temperature online monitoring system only has the function of monitoring temperature, the single function cannot meet the use requirement of a user, and certain influence is brought to the use of the temperature online monitoring system.

The purpose of the invention can be realized by the following technical scheme: a temperature online monitoring system of a modular multilevel converter comprises a monitoring main body and a master control box, wherein the monitoring main body is in communication connection with the master control box, a top cover is inserted into the outer surface of the upper end of the monitoring main body, and a heat dissipation box is fixedly installed on the outer surface of the front end of the monitoring main body;

the first fan is arranged at the position, close to one side, of the outer surface of the front end of the heat dissipation box, the third fan is arranged at the position, close to the other side, of the outer surface of the front end of the heat dissipation box, and the second fan is arranged in the middle of the outer surface of the front end of the heat dissipation box;

an auxiliary heat dissipation port is formed in the outer surface of one side of the monitoring main body, a motor box is fixedly mounted at a position, close to the lower end, of the outer surface of one side of the monitoring main body, a sealing plate is arranged between every two adjacent groups of motor boxes, a motor is arranged inside each motor box, and a braking shaft of each motor is fixedly connected with the sealing plate;

the monitoring device comprises a monitoring main body, a voltage sensor, a wiring hole, an electronic switch and a control circuit, wherein the outer surface of the rear end of the monitoring main body is provided with the wiring hole, the voltage sensor is arranged in the wiring hole, and the position, close to one side, of the outer surface of the rear end of the monitoring main body is fixedly provided with the electronic switch;

a first temperature sensor is fixedly arranged on the outer surface of the lower end of the top cover, a second temperature sensor is fixedly arranged at a position, close to one side, inside the monitoring main body, a third temperature sensor is fixedly arranged at a position, close to the other side, inside the monitoring main body, a tray is arranged at the bottom end inside the monitoring main body, a lifting rod is welded at the middle position of the outer surface of the upper end of the tray, and a sealing block is arranged on the outer surface of the upper end of the top cover;

the master control box comprises a data receiving module, a data processing module, a master control module and an information sending module;

the data receiving module is used for receiving first temperature information acquired by the first temperature sensor, second temperature information acquired by the second temperature sensor, third temperature information acquired by the third temperature sensor and voltage information acquired by the voltage sensor;

the data processing module is used for processing the first temperature information, the second temperature information and the third temperature into first temperature control information, second temperature control information, third temperature control information, total temperature control information and alarm information, and processing the voltage information into power failure information;

the master control module is used for controlling the information sending module to convert first temperature control information into a first temperature control instruction to be sent to the first fan, convert second temperature control information into a second temperature control instruction to be sent to the second fan, convert third temperature control information into a second temperature control instruction to be sent to the third fan, convert alarm information into an alarm instruction to be sent to an intelligent mobile terminal of a user, convert total temperature control information into a master control instruction to be sent to the first fan, the second fan, the third fan and the motor, and convert power failure information into a power failure instruction to the electronic switch.

The lifting rod is characterized in that a threaded hole is formed in the middle of the outer surface of the upper end of the top cover, an auxiliary rod is connected to the inner portion of the threaded hole through a bolt, and one end of the auxiliary rod penetrating through the threaded hole is in threaded connection with the top end of the lifting rod.

The fan structure is characterized in that the number of the first fan, the second fan and the third fan is two, the first fan, the second fan and the third fan are symmetrically arranged, and the second fan is arranged between the first fan and the third fan.

Further, the outer surface of the upper end of the sealing plate is fixedly provided with auxiliary sealing blocks, the auxiliary sealing blocks and the auxiliary radiating holes are four in number, the auxiliary sealing blocks and the auxiliary radiating holes are arranged in parallel at equal intervals, and the auxiliary sealing blocks are matched with the auxiliary radiating holes.

The monitoring device is characterized in that a first connecting groove is formed in the outer surface of the upper end of the monitoring main body, a first clamping groove is formed in the bottom end of the first connecting groove, a first connecting block is inserted into the first connecting groove, a first clamping block is inserted into the first clamping groove, the first clamping block is welded to the lower end of the first connecting block, and the upper end of the first connecting block is welded to the sealing block.

The inner surface of the top cover is provided with a second connecting groove, the bottom end of the second connecting groove is provided with a second clamping groove, a second connecting block is inserted into the second connecting groove, a second clamping block is inserted into the second clamping groove, the second clamping block is welded with the lower end of the second connecting block, and the upper end of the second connecting block is welded with the sealing block.

Further, the specific processing procedure of the first temperature control information is as follows: setting a preset first threshold A1, marking temperature information collected by a first temperature sensor as Wt1, and generating first temperature control information when Wt1 is greater than the first threshold A1;

the specific processing procedure of the second temperature control information is as follows: setting a preset second threshold A2, marking the temperature information collected by the second temperature sensor as Wt2, and generating second temperature control information when Wt2 is greater than the second threshold A2;

the specific processing procedure of the third temperature control information is as follows: setting a preset third threshold A3, marking the temperature information collected by the second temperature sensor as Wt3, and generating third temperature control information when Wt3 is greater than the third threshold A3;

the specific processing process of the total control information is as follows: when the real-time acquired Wt1 is greater than a first threshold A1, the real-time acquired Wt2 is greater than a second threshold A2 and the real-time acquired Wt3 is greater than a third threshold A3, the generated first temperature control information, the generated second temperature control information and the generated third temperature control information are simultaneously converted into total control information;

the specific processing procedure of the alarm information is as follows: after the first fan, the second fan and the third fan are operated for a preset time, the first temperature sensor, the second temperature sensor and the third temperature sensor acquire the temperature information of the modular multilevel converter in the monitoring device again, the temperature information is marked as B1, B2 and B3, the difference between B1 and the first threshold A1, Ba1 between B2 and the difference between B2 and Ba2 between B3 and the difference between B3 and the third threshold A3 are calculated, and when any one of Ba1, Ba2 and Ba3 exceeds a preset value, alarm information is generated.

Further, the specific processing procedure of the power-off information is as follows: (ii) a

The method comprises the following steps: marking the voltage information collected by the voltage sensor as Bt;

step two: the voltage sensor can continuously acquire X times of voltage within a preset time period, wherein X is more than 3 and less than or equal to K, and K is 4 … … n;

step three: when BtX continuous M times is larger than the preset value, the power-off information is generated, M is more than 2 and less than or equal to K-1, and K is 4 … … n.

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

1. in the using process of the invention, a user installs the modular multilevel converter on a tray in a monitoring main body, and after the modular multilevel converter is installed, the temperature of the modular multilevel converter during operation can be monitored by the first temperature sensor, the second temperature sensor and the third temperature sensor in real time, and first temperature control information, second temperature control information, third temperature control information, master control information and alarm information are generated, wherein the specific processing process of the first temperature control information is as follows: the method comprises the steps of setting a preset first threshold A1, marking temperature information acquired by a first temperature sensor with Wt1, generating first temperature control information when Wt1 is larger than the first threshold A1, enabling a first fan 4 to operate after receiving the first temperature control information to cool a modular multilevel converter in a heat dissipation mode, and enabling the specific processing process of second temperature control information to be as follows: the preset second threshold value A2 is set, the temperature information collected by the second temperature sensor is marked Wt2, second temperature control information is generated when Wt2 is larger than the second threshold value A2, the second fan 5 operates to cool the modular multilevel converter after receiving the second temperature control information, and the specific processing process of the third temperature control information is as follows: the third threshold value A3 is preset, the temperature information collected by the second temperature sensor is marked Wt3, third temperature control information is generated when Wt3 is larger than the third threshold value A3, the third fan 6 operates after receiving the third temperature control information to cool the modular multilevel converter, and the specific processing process of the total control information is as follows: when Wt1 acquired in real time is greater than the first threshold a1, Wt2 is greater than the second threshold a2 and Wt3 is greater than the third threshold A3, the first temperature control information, the second temperature control center and the third temperature control information are generated and are simultaneously converted into the total control information, the total control information is converted into a total control instruction and is sent out, the first fan, the second fan and the third fan operate simultaneously to cool the modular multilevel converter, meanwhile, the motor receives the operation of the master control instruction to drive the sealing plate to rotate, so that the auxiliary sealing block on the sealing plate is separated from the auxiliary heat dissipation port, the air flow speed in the monitoring main body is accelerated, the arrangement can ensure that the temperature monitoring effect of the system is better, and the modular multilevel converter can be timely cooled and protected when the temperature is too high, so that the monitoring effect of the system is ensured, and the protection of the system to the modular multilevel converter is improved;

2. the system can also issue an alarm when the temperature of the modular multilevel converter is too high, and the specific processing process of the alarm information is as follows: the first temperature sensor, the second temperature sensor and the third temperature sensor can acquire the temperature information of the modular multilevel converter in the monitoring device again after the first fan, the second fan and the third fan run for a preset time, the temperature information is marked as B1, B2 and B3, the difference between B1 and the first threshold A1, the difference between B1 and B2 and the second threshold A2, the difference between Ba2 and B3 and the difference between Ba3 and the third threshold A3 are calculated, when any one of Ba1, Ba2 and Ba3 exceeds a preset value, alarm information is generated and converted into an alarm instruction to be sent to an intelligent mobile terminal of a user to remind the user of overhauling and maintaining the system, so that the condition that the modular multilevel converter is damaged due to overhigh temperature is effectively avoided, the system can monitor the voltage input to the modular multilevel converter, and a power-off instruction can be generated when the voltage is abnormal, the specific processing procedure of the power failure information is as follows: the voltage information mark that gathers voltage sensor is Bt, voltage sensor can gather X time voltage in the time quantum of predetermineeing in succession, 3 < X be less than or equal to K, when BtX continuous M times is greater than predetermineeing, generate outage information promptly, 2 < M be less than or equal to K-1 outage information be handled into outage instruction and sent electronic switch, afterwards, electronic switch blocks the power supply promptly, thereby more effectual the guard effect who promotes this system, when letting the monitoring effect of this system better, the function that has possessed safety protection.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of the overall structure of the monitoring body according to the present invention;

FIG. 2 is a view of the monitoring body of the present invention in combination with a wire connection port;

FIG. 3 is an internal view of the monitoring body of the present invention;

FIG. 4 is an enlarged view at A of FIG. 3 of the present invention;

FIG. 5 is a view of the connection structure of the motor box and the closing plate of the present invention;

fig. 6 is a block diagram of the system of the present invention.

In the figure: 1. monitoring the subject; 101. a first connecting groove; 102. a first card slot; 2. a top cover; 201. a threaded hole; 202. an auxiliary lever; 203. a second connecting groove; 204. a second card slot; 3. a heat dissipation box; 4. a first fan; 5. a second fan; 6. a third fan; 7. an auxiliary heat dissipation port; 8. a motor case; 801. a motor; 9. closing the plate; 901. auxiliary sealing blocks; 10. a wiring hole; 11. an electronic switch; 12. a first temperature sensor; 13. a second temperature sensor; 14. a third temperature sensor; 15. a tray; 16. lifting a rod; 17. a sealing block; 171. a first connection block; 172. a first clamping block; 173. a second connecting block; 174. a second fixture block; 18. a voltage sensor.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

Referring to fig. 1-6, an on-line temperature monitoring system for a modular multilevel converter comprises a monitoring main body 1 and a master control box, wherein the monitoring main body 1 is in communication connection with the master control box, a top cover 2 is inserted into the outer surface of the upper end of the monitoring main body 1, and a heat dissipation box 3 is fixedly installed on the outer surface of the front end of the monitoring main body 1;

the outer surface of the front end of the heat dissipation box 3 is provided with a first fan 4, a second fan 5 and a third fan 6, the first fan 4, the second fan 5 and the third fan 6 play a role in heat dissipation, the first fan 4 is arranged at a position, close to one side, of the outer surface of the front end of the heat dissipation box 3, the third fan 6 is arranged at a position, close to the other side, of the outer surface of the front end of the heat dissipation box 3, and the second fan 5 is arranged in the middle of the outer surface of the front end of the heat dissipation box 3;

an auxiliary heat dissipation port 7 is formed in the outer surface of one side of the monitoring main body 1, motor boxes 8 are fixedly mounted at positions, close to the lower end, of the outer surface of one side of the monitoring main body 1, a sealing plate 9 is arranged between every two adjacent groups of motor boxes 8, a motor 801 is arranged inside each motor box 8, and a braking shaft of each motor 801 is fixedly connected with the sealing plate 9;

the outer surface of the rear end of the monitoring main body 1 is provided with a wiring hole 10, the wiring hole 10 is used for connecting a cable, a voltage sensor 18 is arranged inside the wiring hole 10, the voltage sensor 18 is used for monitoring voltage, and an electronic switch 11 is fixedly arranged at a position, close to one side, of the outer surface of the rear end of the monitoring main body 1;

a first temperature sensor 12 is fixedly arranged on the outer surface of the lower end of the top cover 2, a second temperature sensor 13 is fixedly arranged at a position, close to one side, inside the monitoring main body 1, a third temperature sensor 14 is fixedly arranged at a position, close to the other side, inside the monitoring main body 1, a tray 15 is arranged at the bottom end inside the monitoring main body 1, a lifting rod 16 is welded at the middle position of the outer surface of the upper end of the tray 15, a sealing block 17 is arranged on the outer surface of the upper end of the top cover 2, and the sealing block 17 plays a role in sealing;

the master control box comprises a data receiving module, a data processing module, a master control module and an information sending module;

the data receiving module is used for receiving first temperature information acquired by the first temperature sensor 12, second temperature information acquired by the second temperature sensor 13, third temperature information acquired by the third temperature sensor 14 and voltage information acquired by the voltage sensor 18;

the data processing module is used for processing the first temperature information, the second temperature information and the third temperature into first temperature control information, second temperature control information, third temperature control information, total temperature control information and alarm information, and processing the voltage information into power failure information;

the master control module is used for converting first temperature control information into a first temperature control instruction and sending the first temperature control instruction to the first fan 4 by the control information sending module, converting second temperature control information into a second temperature control instruction and sending the second temperature control instruction to the second fan 5, converting third temperature control information into a second temperature control instruction and sending the second temperature control instruction to the third fan 6, converting alarm information into an alarm instruction and sending the alarm instruction to the intelligent mobile terminal of a user, converting total temperature control information into a master control instruction and sending the master control instruction to the first fan 4, the second fan 5, the third fan 6 and the motor 801, and converting power failure information into a power failure instruction to the electronic switch 11.

The threaded hole 201 is formed in the middle of the outer surface of the upper end of the top cover 2, the auxiliary rod 202 is connected to the threaded hole 201 through a bolt, one end of the auxiliary rod 202 penetrating through the threaded hole 201 is in threaded connection with the top end of the lifting rod 16, when a user needs to take out the modular multilevel converter, the auxiliary rod 202 is screwed into the threaded hole 201 and then the auxiliary rod 202 is rotated continuously, so that the auxiliary rod 202 is connected with the lifting rod 16, and then the user can use the auxiliary rod 202 to take out the modular multilevel converter conveniently.

The number of the first fan 4, the second fan 5 and the third fan 6 is two, the first fan 4, the second fan 5 and the third fan 6 are symmetrically arranged, and the second fan 5 is arranged between the first fan 4 and the third fan 6.

The outer surface of the upper end of the sealing plate 9 is fixedly provided with auxiliary sealing blocks 901, the auxiliary sealing blocks 901 and the auxiliary heat dissipation ports 7 are four in number, the auxiliary sealing blocks 901 and the auxiliary heat dissipation ports 7 are arranged in parallel at equal intervals, the auxiliary sealing blocks 901 are matched with the auxiliary heat dissipation ports 7, and the auxiliary sealing blocks 901 are used for sealing the auxiliary heat dissipation ports.

First connecting groove 101 has been seted up to the upper end surface of monitoring main part 1, first draw-in groove 102 has been seted up to the bottom of first connecting groove 101, the inside grafting of first connecting groove 101 has first connecting block 171, the inside grafting of first draw-in groove 102 has first fixture block 172, the lower extreme welding with first connecting block 171 of first fixture block 172, the upper end and the sealed block 17 welding of first connecting block 171, second connecting groove 203 has been seted up to the internal surface of top cap 2, second draw-in groove 204 has been seted up to the bottom of second connecting groove 203, the inside grafting of second connecting groove 203 has second connecting block 173, the inside grafting of second draw-in groove 204 has second fixture block 174, second fixture block 174 welds with the lower extreme of second connecting block 173, the upper end and the sealed block 17 welding of second connecting block 173, the setting up of this kind of structure has made things convenient for the installation and the dismantlement of sealed block 17, sealed block 17 has played the effect of sealed gap simultaneously.

The specific processing procedure of the first temperature control information is as follows: setting a preset first threshold A1, marking the temperature information collected by the first temperature sensor 12 as Wt1, and generating first temperature control information when Wt1 is greater than the first threshold A1;

the specific processing procedure of the second temperature control information is as follows: setting a preset second threshold A2, marking the temperature information collected by the second temperature sensor 13 as Wt2, and generating second temperature control information when Wt2 is greater than the second threshold A2;

the specific processing procedure of the third temperature control information is as follows: setting a preset third threshold A3, marking the temperature information collected by the second temperature sensor 13 as Wt3, and generating third temperature control information when Wt3 is greater than the third threshold A3;

the specific processing process of the master control information is as follows: when the real-time acquired Wt1 is greater than a first threshold A1, the real-time acquired Wt2 is greater than a second threshold A2 and the real-time acquired Wt3 is greater than a third threshold A3, the generated first temperature control information, the generated second temperature control information and the generated third temperature control information are simultaneously converted into total control information;

the specific processing procedure of the alarm information is as follows: after the first fan 4, the second fan 5 and the third fan 6 operate for a preset time, the first temperature sensor 12, the second temperature sensor 13 and the third temperature sensor 14 collect the temperature information of the modular multilevel converter in the monitoring device again, the temperature information is respectively marked as B1, B2 and B3, the difference Ba1 between B1 and the first threshold a1, the difference Ba2 between B2 and the second threshold a2, and the difference Ba3 between B3 and the third threshold A3 are calculated, and when any one of Ba1, Ba2 and Ba 35 3 exceeds a preset value, alarm information is generated.

The specific processing procedure of the power failure information is as follows: (ii) a

The method comprises the following steps: marking the voltage information collected by the voltage sensor 18 as Bt;

step two: the voltage sensor 18 continuously collects the voltage for X times within a preset time period, wherein X is more than 3 and less than or equal to K, and K is 4 … … n;

step three: when BtX continuous M times is larger than the preset value, the power-off information is generated, M is more than 2 and less than or equal to K-1, and K is 4 … … n.

When the modular multilevel converter is used, a user installs the modular multilevel converter on a tray 15 in a monitoring main body 1, the first temperature sensor 12, the second temperature sensor 13 and the third temperature sensor 14 can monitor the temperature of the modular multilevel converter in real time when the modular multilevel converter starts to operate after the modular multilevel converter is installed, and first temperature control information, second temperature control information, third temperature control information, master control information and alarm information are generated, wherein the specific processing process of the first temperature control information is as follows: the method comprises the steps of setting a preset first threshold A1, marking temperature information acquired by a first temperature sensor 12 with Wt1, generating first temperature control information when Wt1 is larger than a first threshold A1, enabling a first fan 4 to operate after receiving the first temperature control information to cool a modular multilevel converter in a heat dissipation mode, and specifically processing second temperature control information as follows: a preset second threshold value A2 is set, the temperature information collected by the second temperature sensor 13 is marked Wt2, second temperature control information is generated when Wt2 is larger than the second threshold value A2, the second fan 5 operates after receiving the second temperature control information to cool the modular multilevel converter, and the specific processing process of the third temperature control information is as follows: a preset third threshold value A3 is set, the temperature information collected by the second temperature sensor 13 is marked with Wt3, third temperature control information is generated when Wt3 is larger than the third threshold value A3, the third fan 6 operates after receiving the third temperature control information to cool the modular multilevel converter, and the specific processing process of the total control information is as follows: when the real-time collected Wt1 is greater than the first threshold a1, Wt2 is greater than the second threshold a2, and Wt3 is greater than the third threshold A3, the generated first temperature control information, the second temperature control center and the third temperature control information are simultaneously converted into total control information, the total control information is converted into a total control command and is sent out, the first fan 4, the second fan 5 and the third fan 6 are simultaneously operated to cool the modular multilevel converter, and the motor 801 receives the total control command to operate to drive the closing plate 9 to rotate, so that the auxiliary sealing block 901 on the closing plate 9 is separated from the auxiliary heat dissipation port 7, thereby increasing the air flow speed in the monitoring main body 1, i.e. increasing the heat dissipation efficiency, and by the arrangement, the temperature monitoring effect of the system is better, and the modular multilevel converter can be protected by heat dissipation in time when the temperature is too high, thereby ensuring the monitoring effect of the system, the protection performance of the system to the modular multilevel converter is improved, the system can also issue an alarm when the temperature of the modular multilevel converter is too high, and the specific processing process of the alarm information is as follows: after the first fan 4, the second fan 5 and the third fan 6 operate for a preset time, the first temperature sensor 12, the second temperature sensor 13 and the third temperature sensor 14 collect temperature information of the modular multilevel converter in the monitoring device again, the temperature information is respectively marked as B1, B2 and B3, a difference Ba1 between B1 and a first threshold a1, a difference Ba2 between B2 and a second threshold a2, and a difference Ba3 between B3 and a third threshold A3 are calculated, when any one of Ba1, Ba2 and Ba3 exceeds a preset value, alarm information is generated and converted into an alarm command to be sent to an intelligent mobile terminal of a user to remind the user of performing maintenance on the system, so that the condition that the modular multilevel converter is damaged due to overhigh temperature of the modular multilevel converter is effectively avoided, and the system can monitor the voltage input to the modular multilevel converter, when the voltage is abnormal, a power-off instruction is sent out, and the specific processing process of the power-off information is as follows: the voltage information mark that will gather voltage sensor 18 is Bt, voltage sensor 18 can gather X voltage in the time quantum of predetermineeing in succession, 3 < X be less than or equal to K, when BtX continuous M is greater than predetermineeing, generate outage information promptly, 2 < M be less than or equal to K-1 outage information is handled into outage instruction and is sent electronic switch 11, afterwards, electronic switch 11 cuts off the power supply promptly, thereby more effectual protective effect who promotes this system, when making the monitoring effect of this system better, the function that has possessed safety protection has been possessed.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.