Generator excitation side monitoring fire prevention system and control method thereof

Abstract

The invention discloses a generator excitation side monitoring fire prevention system and a control method thereof. The generator excitation side monitoring fire prevention system comprises a generator chamber, a generator device, a hydrogen sensor, a temperature measuring device, a carbon dioxide injection device, a monitoring background and a controller. A cooling medium of a cooling assembly of the hydrogen-cooled generator device is hydrogen; the at least one hydrogen sensor, the temperature measuring device and the carbon dioxide spraying device are arranged in the generator chamber; the controller is electrically connected with the hydrogen sensor, the temperature measuring device and the carbon dioxide injection device, and the controller is used for controlling the carbon dioxide injection device according to the detection result of the hydrogen sensor and / or the temperature measuring device. According to the generator excitation side monitoring fire prevention system provided by the embodiment of the invention, the hydrogen concentration and temperature in the generator chamber can be detected, whether a fire hazard occurs or not can be more accurately judged, and danger and loss caused by untimely fire extinguishing can be avoided; and automatic fire extinguishing is carried out, the manual monitoring pressure is reduced, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of generator fire prevention, and in particular to a generator excitation side monitoring fire prevention system and a control method thereof. Background Art

[0002] The temperature of the generator is high during operation. In order to make the generator work more stably and safely, the hydrogen cooling unit uses hydrogen as the cooling medium to cool the generator. However, hydrogen may leak on the excitation side of the generator, causing fire or explosion hazards, resulting in casualties and property losses. The generator fire protection system in the related technology cannot detect hydrogen leakage in time; and the fire extinguishing equipment requires manual operation, and the fire may not be extinguished in time. When there is no personnel monitoring, the fire extinguishing operation cannot be performed, which may delay the fire extinguishing time and increase safety hazards. Therefore, there is room for improvement. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to propose a generator excitation side monitoring fire protection system, which can detect the hydrogen concentration and temperature in the generator room by making the generator excitation side monitoring fire protection system include at least one hydrogen sensor and a temperature measuring device; by making the controller be used to monitor the two conditions of hydrogen concentration and temperature according to the detection results of the hydrogen sensor and / or the temperature measuring device, it can more accurately judge whether there is a fire hazard, avoiding danger and loss caused by untimely fire extinguishing; by making the controller able to control the carbon dioxide injection device, the controller can automatically extinguish the fire in dangerous situations, reduce the pressure of manual monitoring, and automatically and timely extinguish the fire without human monitoring, reducing safety hazards.

[0004] The present invention also proposes a control method for the generator excitation side monitoring fire protection system.

[0005] According to the first aspect of the present invention, the generator excitation side monitoring fire protection system comprises: a generator room; a generator device, which is arranged in the generator room and comprises a generator body and a cooling assembly, wherein the cooling assembly is arranged in the generator body for cooling the generator body, and the cooling medium of the cooling assembly is hydrogen; at least one hydrogen sensor, which is arranged in the generator room and is used to detect the hydrogen concentration in the generator room; a temperature measuring device, which is arranged in the generator room and is used to detect the temperature in the generator room; a carbon dioxide injection device, which is arranged in the generator room and is used to release carbon dioxide into the generator room; a controller, which is electrically connected to the hydrogen sensor, the temperature measuring device and the carbon dioxide injection device, and the controller is used to control the carbon dioxide injection device according to the detection results of the hydrogen sensor and / or the temperature measuring device; a monitoring background, which is connected to the controller and is used to display the equipment status of the generator excitation side monitoring fire protection system.

[0006] According to the generator excitation side monitoring fire protection system of the embodiment of the present invention, by making the generator excitation side monitoring fire protection system include at least one hydrogen sensor and a temperature measuring device, the system can detect the hydrogen concentration and temperature in the generator room; by making the controller be used to monitor the two conditions of hydrogen concentration and temperature according to the detection results of the hydrogen sensor and / or the temperature measuring device, it can more accurately judge whether there is a fire hazard, thereby avoiding danger and loss caused by untimely fire extinguishing; by making the controller able to control the carbon dioxide injection device, the controller can automatically extinguish the fire in dangerous situations, reducing the pressure of manual monitoring, and automatically and timely extinguish the fire without personnel monitoring, thereby reducing safety hazards.

[0007] According to some embodiments of the present invention, at least one of the hydrogen sensors comprises a first hydrogen sensor, and the first hydrogen sensor is mounted on the generator body and is located outside the generator body.

[0008] According to some embodiments of the present invention, the first hydrogen sensor is installed at the upper end of the generator body; and / or, a base is provided in the generator room, the generator body is installed on the base, there are two hydrogen sensors, the two hydrogen sensors include the first hydrogen sensor and the second hydrogen sensor, and the second hydrogen sensor is installed on the base.

[0009] According to some embodiments of the present invention, the generator excitation side monitoring fire protection system also includes a fire extinguishing alarm device, which is electrically connected to the controller and is used to issue an alarm when the hydrogen concentration and / or temperature in the generator room reaches preset conditions.

[0010] According to some embodiments of the present invention, the carbon dioxide injection device includes a plurality of injection heads, wherein the plurality of injection heads are arranged at the top of the generator chamber and are located obliquely above the generator body, and the plurality of injection heads are arranged at intervals along the circumference of the generator body to inject carbon dioxide in the direction of the generator body; and / or the temperature measuring device is arranged at the top of the generator chamber and is located directly above the generator body.

[0011] According to some embodiments of the present invention, a human body detection device is further included. The human body detection device is disposed in the generator room and is used to detect whether there is a person in the generator room. The human body detection device is connected to the controller. The controller is used to control the carbon dioxide injection device according to the detection results of the hydrogen sensor and / or the temperature measuring device, and according to the detection results of the human body detection device.

[0012] According to some embodiments of the present invention, a reminder alarm device 22 is further included. The reminder alarm device 22 is arranged in the generator room and electrically connected to the controller. The reminder alarm device 22 is used to issue a generator room fire alarm in the main control room when the hydrogen concentration and / or temperature in the generator room meets the activation condition of the carbon dioxide injection device; when the activation condition is met and the human body detection device detects that there is someone in the generator room, a reminder alarm sound is issued.

[0013] According to some embodiments of the present invention, the monitoring background includes a control panel, and the generator excitation side monitoring fire protection system has a manual control state and an automatic control state, and the priority of the manual control state is higher than the priority of the automatic control state.

[0014] According to the control method of the generator excitation side monitoring fire protection system of the second aspect of the present invention, the automatic start condition of the carbon dioxide injection device includes: the hydrogen concentration in the generator room is greater than 2%, or it is confirmed that the hydrogen concentration in the generator room is greater than 0.2% and the temperature in the generator room is greater than 130°C; the automatic stop condition of the carbon dioxide injection device includes: the hydrogen concentration in the generator room is lower than 0.2%.

[0015] According to the control method of the generator excitation side monitoring fire protection system of the embodiment of the present invention, by making the automatic start condition include that the hydrogen concentration in the generator room is greater than 2%, it is possible to avoid explosions caused by excessive hydrogen concentration and to extinguish the fire more promptly; by making the automatic start condition include that the hydrogen concentration in the generator room is greater than 0.2% and the temperature in the generator room is greater than 130°C, it is judged whether carbon dioxide needs to be injected into the generator room based on the two conditions, so that the method makes a more accurate judgment on whether fire extinguishing is needed and can extinguish the fire more promptly; by making the automatic stop condition of the carbon dioxide injection device include that the hydrogen concentration in the generator room is lower than 0.2%, it is possible to reduce the use of carbon dioxide, a fire extinguishing agent, and avoid wasting carbon dioxide while fully ensuring the safety of the generator room.

[0016] According to some embodiments of the present invention, the automatic start-up condition of the carbon dioxide injection device includes: confirming that there is no one in the power generation room.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a generator excitation side monitoring fire protection system according to some embodiments of the present invention;

[0020] Figure 2 A control method for a generator excitation side monitoring fire protection system according to some embodiments of the present invention.

[0021] Reference numerals:

[0022] 100. Generator excitation side monitoring fire protection system;

[0023] 10. Generator room; 11. Generator device; 12. Generator body; 13. Hydrogen sensor; 14. First hydrogen sensor; 15. Second hydrogen sensor; 16. Temperature measuring device; 17. Carbon dioxide injection device; 18. Injection head; 19. Human body detection device; 20. Door; 21. Base; 22. Reminder alarm device. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] Reference below Figure 1-Figure 2 A generator excitation side monitoring fire protection system 100 according to an embodiment of the present invention is described.

[0026] According to the first embodiment of the present invention, the generator excitation side monitoring fire protection system 100 includes: a generator room 10, a generator device 11, at least one hydrogen sensor 13, a temperature measuring device 16, a carbon dioxide injection device 17, a controller and a monitoring background.

[0027] The generator room 10 is used to accommodate the generator device 11. For example, the generator room 10 includes at least one door 20, and the door 20 is in a normally closed state. When relevant personnel need to maintain or repair the generator device 11, the relevant personnel can open the door 20, enter the generator room 10 through the door 20 and close the door 20.

[0028] Reference Figure 1 The generator device 11 is arranged in the generator room 10 and includes a generator body 12 and a cooling assembly. The cooling assembly is arranged in the generator body 12 to cool the generator body 12. The cooling medium of the cooling assembly is hydrogen. At least one hydrogen sensor 13 is arranged in the generator room 10 and is used to detect the hydrogen concentration in the generator room 10. Since an excessively high concentration of hydrogen may cause dangers such as explosion, by having at least one hydrogen sensor 13 in the generator room 10, the hydrogen concentration in the generator room 10 can be detected and monitored, and whether there are safety hazards in the generator room 10 can be judged more timely.

[0029] For example, there may be one or two hydrogen sensors 13 in the generator room 10. By providing a plurality of hydrogen sensors 13 in the generator room 10, the hydrogen concentration in the generator room 10 can be measured more accurately.

[0030] The temperature measuring device 16 is disposed in the generator room 10 and is used to detect the temperature in the generator room 10. Since the generator device 11 uses hydrogen as a cooling medium, when the temperature in the generator room 10 is too high, the hydrogen is likely to cause explosion and other dangers. By providing the temperature measuring device 16 in the generator room 10, the temperature in the generator room 10 can be detected and monitored, and whether there are safety hazards in the generator room 10 can be determined more promptly. For example, the temperature measuring device 16 can be an infrared temperature measuring device 16.

[0031] The carbon dioxide injection device 17 is provided in the generator room 10 and is used to release carbon dioxide into the generator room. By providing the carbon dioxide injection device 17 in the generator room 10, carbon dioxide has a fire extinguishing effect, and the generator excitation side monitoring fire protection system 100 can extinguish the fire in the generator room 10, avoiding danger caused by personnel entering the generator room 10 to handle the fire extinguishing.

[0032] The controller is electrically connected to the hydrogen sensor 13, the temperature measuring device 16 and the carbon dioxide injection device 17, and the controller is used to control the carbon dioxide injection device 17 according to the detection results of the hydrogen sensor 13 and / or the temperature measuring device 16. By making the generator excitation side monitoring fire protection system 100 include a controller, and the controller is used to control the carbon dioxide injection device 17 according to the detection results of the hydrogen sensor 13 and / or the temperature measuring device 16, it is possible to more accurately judge whether there is a fire hazard in the generator room 10 according to the detection results of the hydrogen sensor 13 and / or the temperature measuring device 16, thereby avoiding danger caused by untimely fire extinguishing operation; and it is possible to reduce the pressure of manual monitoring, and timely monitoring can be performed when there is no relevant personnel to monitor the indoor hydrogen concentration or temperature, and fire extinguishing can be performed in dangerous situations, thereby reducing safety hazards.

[0033] For example, the controller controls the carbon dioxide injection device 17 according to the detection results of the hydrogen sensor 13; for example, the controller controls the carbon dioxide injection device 17 according to the detection results of the temperature measuring device 16; for another example, the controller is used to control the carbon dioxide injection device 17 according to the detection results of the hydrogen sensor 13 and the temperature measuring device 16.

[0034] The monitoring background monitors the equipment status display of the fire protection system 100 through the generator excitation side. The monitoring background is connected to the controller, and the monitoring background can be implemented by programming logic through the DCS control system. For example, the monitoring background can display whether there is a fire hazard in the generator room 10; for example, the monitoring background can include a manual switch, and the relevant personnel can turn on or off the carbon dioxide injection device 17 through the manual switch.

[0035] According to the generator excitation side monitoring fire protection system 100 of the embodiment of the present invention, by making the generator excitation side monitoring fire protection system 100 include at least one hydrogen sensor 13 and a temperature measuring device 16, the system can detect the hydrogen concentration and temperature in the generator room 10; by making the controller used to monitor the two conditions of hydrogen concentration and temperature according to the detection results of the hydrogen sensor 13 and / or the temperature measuring device 16, it can more accurately judge whether there is a fire hazard, and avoid danger and loss caused by untimely fire extinguishing; by making the controller able to control the carbon dioxide injection device 17, the controller is allowed to automatically extinguish the fire in dangerous situations, reducing the pressure of manual monitoring, and automatically and timely extinguish the fire without personnel monitoring, thereby reducing safety hazards.

[0036] According to some embodiments of the present invention, referring to Figure 1, at least one hydrogen sensor 13 includes a first hydrogen sensor 14, and the first hydrogen sensor 14 is installed on the generator body 12 and is located outside the generator body 12. By installing the first hydrogen sensor 14 on the generator body 12, the first hydrogen sensor 14 can be close to the generator body 12, and the danger can be discovered more quickly and timely when hydrogen leaks in the generator cooling assembly; by locating the first hydrogen sensor 14 outside the generator body 12, the electrical connection of the first hydrogen sensor 14 can be facilitated, and the first hydrogen sensor 14 can be prevented from interfering with the components in the generator body 12.

[0037] According to some embodiments of the present invention, referring to Figure 1 The first hydrogen sensor 14 is installed at the upper end of the generator body 12. The density of hydrogen is lighter than that of air. When hydrogen in the generator cooling assembly leaks, the hydrogen moves upward in the generator chamber 10. By installing the first hydrogen sensor 14 at the upper end of the generator body 12, the hydrogen concentration can be detected more timely and accurately, and the danger of hydrogen leakage can be discovered more quickly.

[0038] According to some embodiments of the present invention, referring to Figure 1 A base 21 is provided in the generator room 10, the generator body 12 is mounted on the base 21, and there are two hydrogen sensors 13, including a first hydrogen sensor 14 and a second hydrogen sensor 15, and the second hydrogen sensor 15 is mounted on the base 21. By having two hydrogen sensors 13, when one of the hydrogen sensors 13 is damaged, the other hydrogen sensor 13 can be used to detect and monitor the hydrogen concentration in the generator room 10, thereby improving the safety of the monitoring fire protection system 100 on the excitation side of the generator; by mounting the second hydrogen sensor 15 on the base 21, the second hydrogen sensor 15 can be positioned lower, so that the hydrogen leakage in the generator room 10 can be evaluated.

[0039] For example, when hydrogen in the generator cooling assembly leaks, the hydrogen moves upward in the generator room 10. At this time, the first hydrogen sensor 14 preliminarily detects that hydrogen has leaked. When the amount of hydrogen leakage is large, the second hydrogen sensor 15 measures that the hydrogen concentration has increased. At this time, there is danger in the generator room 10, and the controller controls the carbon dioxide injection device 17 to inject carbon dioxide for fire extinguishing.

[0040] According to some embodiments of the present invention, the generator excitation side monitoring fire protection system 100 also includes a fire extinguishing alarm device, which is electrically connected to the controller, and the fire extinguishing alarm device is used to sound an alarm when the hydrogen concentration and / or temperature in the generator room 10 reaches a preset condition. Wherein, the hydrogen concentration in the generator room 10 reaches the preset condition, including: the hydrogen concentration in the generator room 10 is greater than 2%, or it is confirmed that the hydrogen concentration in the generator room 10 is greater than 0.2% and the temperature in the generator room 10 is greater than 130°C. By making the fire extinguishing alarm device sound an alarm when the hydrogen concentration and / or temperature in the generator room 10 reaches the preset condition, relevant personnel can be promptly reminded that danger occurs in the generator room 10, thereby reducing safety hazards.

[0041] According to some embodiments of the present invention, referring to Figure 1 The carbon dioxide injection device 17 includes a plurality of injection heads 18, which are arranged at the top of the generator room 10 and obliquely above the generator body 12. The plurality of injection heads 18 are arranged at intervals along the circumference of the generator body 12 to inject carbon dioxide in the direction of the generator body 12. By making the carbon dioxide injection device 17 include a plurality of injection heads 18, and the plurality of injection heads 18 are arranged at intervals along the circumference of the generator body 12, the ejected carbon dioxide can be evenly distributed along the circumference of the generator body 12 in the room, ensuring that the carbon dioxide extinguishes the fire more fully. By making the plurality of injection heads 18 arranged at the top of the generator room 10 and obliquely above the generator body 12, the carbon dioxide ejected by the injection heads 18 can move downward under the action of its own gravity, so that the distribution of carbon dioxide in the generator room 10 is relatively uniform, and the fire extinguishing effect of carbon dioxide is better.

[0042] According to some embodiments of the present invention, referring to Figure 1 The temperature measuring device 16 is disposed on the top of the generator room 10 and is located directly above the generator body 12. By disposing the temperature measuring device 16 on the top of the generator room 10 and being located directly above the generator body 12, the temperature in the generator room 10 can be measured more accurately to determine whether there is danger in the generator room 10.

[0043] According to some embodiments of the present invention, referring to Figure 1The generator excitation side monitoring fire protection system 100 also includes a human body detection device 19, which is arranged in the generator room 10 and is used to detect whether there is anyone in the generator room 10. The human body detection device 19 is connected to the controller, and the controller is used to control the carbon dioxide injection device 17 according to the detection results of the hydrogen sensor 13 and / or the temperature measuring device 16, and according to the detection results of the human body detection device 19. By making the generator excitation side monitoring fire protection system 100 also include the human body detection device 19, the generator excitation side monitoring fire protection system 100 can always detect whether there is anyone in the generator room 10, so as to determine whether releasing the carbon dioxide injection device 17 will cause the person in the generator room 10 to suffocate to death.

[0044] For example, when the human body detection device 19 detects that there is someone in the generator room 10, no matter what the detection results of the hydrogen sensor 13 and the temperature measuring device 16 are, the controller prohibits the carbon dioxide injection device 17 from injecting carbon dioxide to prevent the person in the generator room 10 from inhaling too much carbon dioxide and suffocating to death.

[0045] For example, the human body detection device 19 may include an image acquisition device; for another example, the human body detection device 19 may include a visual pan-tilt platform.

[0046] According to some embodiments of the present invention, referring to Figure 2 The generator excitation side monitoring fire protection system 100 also includes a reminder alarm device 22, which is arranged in the generator room 10 and electrically connected to the controller. The reminder alarm device 22 is used to issue a reminder alarm sound when the hydrogen concentration and / or temperature in the generator room 10 meets the opening conditions of the carbon dioxide injection device 17 and the human body detection device 19 detects that there is someone in the generator room 10. By making the generator excitation side monitoring fire protection system 100 include the reminder alarm device 22, when there is a safety hazard in the generator room 10, a reminder alarm sound is issued, so that the personnel in the generator room 10 can receive the alarm information in time and evacuate the generator room 10, so as to avoid people being affected by the fire and explosion in the generator room 10, and also avoid people from suffocating to death by inhaling too much fire extinguishing agent carbon dioxide, so as to more fully ensure the safety of the people in the generator room 10.

[0047] For example, the reminder alarm device 22 may be located above the door 20 .

[0048] For example, the warning alarm device 22 is used to sound a warning alarm when the hydrogen concentration or temperature in the generator room 10 meets the activation condition of the carbon dioxide injection device 17 and the human body detection device 19 detects that there is someone in the generator room 10.

[0049] According to some embodiments of the present invention, the monitoring background and the controller are both implemented by programming the DCS control system used by the unit, the monitoring background includes a control panel, and the generator excitation side monitoring fire protection system 100 has a manual control state and an automatic control state, and the priority of the manual control state is higher than the priority of the automatic control state. By making the generator excitation side monitoring fire protection system 100 have a manual control state, and the priority of the manual control state is higher than the priority of the automatic control state, when relevant personnel receive a fire alarm signal and monitor the situation in the generator room 10, they can turn on the manual mode and manually extinguish the fire or stop the fire extinguishing operation according to the monitoring situation, so as to deal with different emergencies, and they can also stop the fire extinguishing in time to avoid the waste of fire extinguishing agent.

[0050] According to the control method of the generator excitation side monitoring fire protection system 100 of the second embodiment of the present invention, refer to Figure 2 The automatic start conditions of the carbon dioxide injection device 17 include: the hydrogen concentration in the generator room 10 is greater than 2%, or it is confirmed that the hydrogen concentration in the generator room 10 is greater than 0.2% and the temperature in the generator room 10 is greater than 130°C; the automatic stop conditions of the carbon dioxide injection device 17 include: the hydrogen concentration in the generator room 10 is lower than 0.2%.

[0051] According to the control method of the generator excitation side monitoring fire protection system 100 of the embodiment of the present invention, by making the automatic start condition include the hydrogen concentration in the generator room 10 being greater than 2%, it is possible to avoid explosions caused by excessive hydrogen concentration and to extinguish the fire more promptly; by making the automatic start condition include the hydrogen concentration in the generator room 10 being greater than 0.2% and the temperature in the generator room 10 being greater than 130°C, it is judged whether carbon dioxide needs to be injected into the generator room 10 based on the two conditions, so that the method makes a more accurate judgment on whether fire extinguishing is needed and can extinguish the fire more promptly; by making the automatic stop condition of the carbon dioxide injection device 17 include the hydrogen concentration in the generator room 10 being lower than 0.2%, it is possible to reduce the use of the fire extinguishing agent carbon dioxide and avoid wasting carbon dioxide while fully ensuring the safety of the generator room 10.

[0052] According to some embodiments of the present invention, referring to Figure 2 The automatic start condition of the carbon dioxide injection device 17 includes: confirming that no one is in the power generation room. By making the automatic start condition of the carbon dioxide injection device 17 include confirming that no one is in the power generation room, it is possible to prevent people in the power generation room 10 from inhaling too much fire extinguishing agent carbon dioxide and suffocating to death, and the safety of people in the power generation room 10 is more fully guaranteed.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0055] In the description of the present invention, "plurality" means two or more.

[0056] In the description of the present invention, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0057] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0059] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A generator excitation side monitoring fire protection system, characterized in that: include: Generator room; A generator device is arranged in the generator room and comprises a generator body and a cooling assembly, wherein the cooling assembly is arranged in the generator body to cool the generator body, and the cooling medium of the cooling assembly is hydrogen; at least one hydrogen sensor disposed in the generator chamber and used to detect the hydrogen concentration in the generator chamber; A temperature measuring device, disposed in the generator room and used to detect the temperature in the generator room; A carbon dioxide injection device is disposed in the generator room and is used to release carbon dioxide into the generator room; a controller, electrically connected to the hydrogen sensor, the temperature measuring device and the carbon dioxide injection device, the controller being used to control the carbon dioxide injection device according to the detection results of the hydrogen sensor and / or the temperature measuring device; A monitoring background, the monitoring background is connected to the controller, and the monitoring background is used to display the equipment status of the fire protection system on the generator excitation side.

2. The generator excitation side monitoring fire protection system according to claim 1, characterized in that: At least one of the hydrogen sensors includes a first hydrogen sensor mounted on the generator body and located outside the generator body.

3. The generator excitation side monitoring fire protection system according to claim 2, characterized in that: The first hydrogen sensor is installed at the upper end of the generator body; And / or, a base is provided in the generator room, the generator body is mounted on the base, there are two hydrogen sensors, the two hydrogen sensors include the first hydrogen sensor and the second hydrogen sensor, and the second hydrogen sensor is mounted on the base.

4. The generator excitation side monitoring fire protection system according to claim 1, characterized in that: It also includes a fire extinguishing alarm device, which is electrically connected to the controller and is used to issue an alarm when the hydrogen concentration and / or temperature in the generator room reaches a preset condition.

5. The generator excitation side monitoring fire protection system according to claim 1, characterized in that: The carbon dioxide injection device comprises a plurality of injection heads, which are arranged at the top of the generator chamber and obliquely above the generator body, and are arranged at intervals along the circumference of the generator body to inject carbon dioxide in the direction of the generator body; And / or, the temperature measuring device is arranged on the top of the generator room and is located directly above the generator body.

6. The generator excitation side monitoring fire protection system according to claim 1, characterized in that: It also includes a human body detection device, which is arranged in the generator room and is used to detect whether there is a person in the generator room. The human body detection device is connected to the controller. The controller is used to control the carbon dioxide injection device according to the detection results of the hydrogen sensor and / or the temperature measuring device and the detection results of the human body detection device.

7. The generator excitation side monitoring fire protection system according to claim 6, characterized in that: It also includes a reminder alarm device, which is arranged in the generator room and electrically connected to the controller. The reminder alarm device is used to issue a reminder alarm sound when the hydrogen concentration and / or temperature in the generator room meets the activation condition of the carbon dioxide injection device and the human body detection device detects that there is someone in the generator room.

8. The generator excitation side monitoring fire protection system according to any one of claims 1 to 7, characterized in that: The monitoring background includes a control panel and an alarm status display. The generator excitation side monitoring fire protection system has a manual control state and an automatic control state. The priority of the manual control state is higher than the priority of the automatic control state.

9. A control method for a generator excitation side monitoring fire protection system according to any one of claims 1 to 8, characterized in that: The automatic start-up conditions of the carbon dioxide injection device include: the hydrogen concentration in the generator room is greater than 2%, or it is confirmed that the hydrogen concentration in the generator room is greater than 0.2% and the temperature in the generator room is greater than 130° C.; The automatic stopping condition of the carbon dioxide injection device includes: the hydrogen concentration in the generator room is lower than 0.2%.

10. The control method of the generator excitation side monitoring fire protection system according to claim 9, characterized in that: The automatic start condition of the carbon dioxide injection device includes: confirming that there is no one in the power generation room.

Images