Generator excitation side fire prevention system

Abstract

The embodiment of the utility model discloses a generator excitation side fireproof system, and relates to the technical field of power generation safety, and the method comprises the steps: obtaining the hydrogen content data and the temperature data of a generator chamber in which a target generator is located; comparing the hydrogen content data with a preset hydrogen content threshold value to obtain a first comparison result, and comparing the temperature data with a preset temperature threshold value to obtain a second comparison result; if the first comparison result is used for representing that the hydrogen content data is greater than or equal to a preset hydrogen content threshold value and / or the second comparison result is used for representing that the temperature data is greater than or equal to a preset temperature threshold value, acquiring image data of the generator room, and judging whether a person exists in the generator room based on the image data through an image recognition technology; if yes, alarm information is generated, and the alarm information is sent to a generator room; and if not, controlling a gas spraying device in the generator chamber to release the flame-retardant gas to fill the generator chamber.

Description

Technical Field

[0001] The utility model relates to the technical field of power generation safety, in particular to a fire protection system for the excitation side of a generator. Background Art

[0002] In the power industry, especially during the power generation process of thermal power plants, the excitation side of the generator is a critical area. Here, hydrogen is used as a cooling medium to cool the generator's rotor and stator. However, hydrogen is an extremely flammable and explosive gas, and a leak can have serious consequences.

[0003] Existing solutions for preventing hydrogen leaks primarily rely on regular inspection and maintenance of equipment in the generator excitation area. Fire-fighting equipment is also available to extinguish hydrogen leaks. However, these devices typically require manual operation, have slow response times, and lack real-time monitoring and automated fire extinguishing capabilities. Utility Model Content

[0004] In view of this, the utility model provides a generator excitation side fire protection system to solve the problems in the prior art that on-site operation by personnel is required, the response speed is slow, and real-time monitoring and automatic fire extinguishing cannot be achieved.

[0005] In a first aspect, an embodiment of the present invention provides a generator excitation side fire protection system, the system comprising:

[0006] Target generator, hydrogen content sensor, gas spray device, visual pan / tilt / infrared temperature measurement device and control unit;

[0007] The gas nozzle of the gas spray device is arranged at the top of the generator room where the target generator is located, and the gas spray device is used to release flame-retardant gas to fill the generator room;

[0008] The hydrogen content sensor is arranged in the generator where the target generator is located;

[0009] The visual PTZ / infrared temperature measuring device is arranged at the top of the generator room, and is used to obtain temperature data of the generator room, and is also used to obtain image data of the generator room;

[0010] The control unit is respectively connected to the hydrogen content sensor, the gas spray device, and the visual pan / infrared temperature measuring device.

[0011] Optionally, the gas spray device includes at least two gas nozzles, and the gas nozzles are symmetrically arranged on both sides of the target generator.

[0012] Optionally, the gas nozzle is arranged at the top of the generator room where the target generator is located through a steering structure.

[0013] Optionally, the generator excitation side fire protection system includes at least two hydrogen content sensors, wherein a first hydrogen content sensor is provided on the target generator, and the second hydrogen content sensor is provided on a base of the target generator.

[0014] Optionally, the flame-retardant gas is carbon dioxide gas.

[0015] Optionally, the control unit is respectively connected to the hydrogen content sensor, the gas spray device, and the visual pan / tilt / infrared temperature measuring device in a wireless connection manner.

[0016] The technical solution of the embodiment of the utility model uses a hydrogen content sensor and a visual pan-tilt / infrared temperature measurement device to obtain hydrogen content data and temperature data of the generator room where the target generator is located, and sends the hydrogen content data and temperature data of the generator room to a control unit. The control unit compares the hydrogen content data with a preset hydrogen content threshold to obtain a first comparison result, and compares the temperature data with a preset temperature threshold to obtain a second comparison result. If the first comparison result indicates that the hydrogen content data is greater than or equal to the preset hydrogen content threshold and / or the second comparison result indicates that the temperature data is greater than or equal to the preset temperature threshold, image data of the generator room is obtained and, based on the image data, image recognition technology is used to determine whether there is a person in the generator room. If there is a person in the generator room, an alarm message is generated. If there is no person in the generator room, a gas spray device in the generator room is controlled to release a flame-retardant gas to fill the generator room. By real-time monitoring of hydrogen content and temperature changes in the generator excitation side area, timely and effective fire prevention warnings are ensured when there are no people present, thereby effectively preventing and addressing safety hazards caused by hydrogen leaks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] in:

[0019] Figure 1 Schematic diagram of the structure of a fire protection system on the excitation side of a generator in one embodiment;

[0020] Figure 2 The figure is a flow chart of a method for preventing fire on the excitation side of a generator in one embodiment. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] like Figure 1 As shown, the present application provides a generator excitation side fire protection system, the system comprising:

[0023] Target generator 3, hydrogen content sensor, gas spray device 6, visual pan / tilt / infrared temperature measuring device 7 and control unit 2;

[0024] The gas nozzle of the gas spray device 6 is arranged at the top of the discharge machine room 1 where the target generator 3 is located, and the gas spray device 6 is used to release flame-retardant gas to fill the generator room 1;

[0025] The hydrogen content sensor is arranged in the generator room 1 where the target generator 3 is located;

[0026] The visual PTZ / infrared temperature measuring device 7 is provided at the top of the generator room 1. The visual PTZ / infrared temperature measuring device 7 is used to obtain temperature data of the generator room 1. The visual PTZ / infrared temperature measuring device 7 is also used to obtain image data of the generator room 1.

[0027] The control unit 2 is data-connected to the hydrogen content sensor, the gas spray device 6 , and the visual pan / tilt / infrared temperature measuring device 7 , respectively.

[0028] In a possible implementation manner, the gas spray device includes at least two gas spray heads, and the gas spray heads are symmetrically arranged on both sides of the target generator.

[0029] For example, by symmetrically arranging the gas nozzles on both sides of the target generator, the problem that the flame-retardant gas ejected from a single gas nozzle is difficult to quickly reach the other side of the target generator when the target generator is blocked can be avoided.

[0030] In a possible implementation, the generator excitation side fire protection system includes at least two hydrogen content sensors, wherein the first hydrogen content sensor 4 is provided on the target generator, and the second hydrogen content sensor 5 is provided on the base of the target generator.

[0031] In a possible implementation manner, the gas nozzle is disposed at the top of the generator chamber where the target generator is located through a steering structure.

[0032] For example, by controlling the direction of the gas nozzle through the steering structure, the flame-retardant gas ejected by the gas nozzle can be directly sprayed to a predetermined area, such as the combustion area, and the flame-retardant gas can also be more evenly filled in the generator chamber.

[0033] In a possible implementation manner, the flame-retardant gas is carbon dioxide gas.

[0034] For example, carbon dioxide gas is used as the flame retardant gas, and the low pollution and low cost characteristics of carbon dioxide gas are utilized to reduce costs and avoid pollution while ensuring the flame retardant effect.

[0035] In a possible embodiment, the control unit is connected to the hydrogen content sensor, the gas spray device, and the visual pan / infrared temperature measuring device by wireless connection.

[0036] For example, wireless connection is used to avoid burning wires during combustion, making the system more reliable.

[0037] In one embodiment, the present invention provides a method for preventing fires on the excitation side of a generator. The method can be implemented by a generator excitation side fire prevention device. The generator excitation side fire prevention device can be implemented by software and / or hardware.

[0038] like Figure 2 As shown, the fire prevention method for the generator excitation side of the embodiment of the utility model specifically includes the following steps:

[0039] S110, obtaining hydrogen content data in a generator room where a target generator is located and temperature data of the generator room;

[0040] For example, by using a variety of data to evaluate the safety status of the generator room where the target generator is located, more scenarios can be addressed. That is, this method can be applied to scenarios of hydrogen leakage as well as scenarios of fire in the generator room.

[0041] S120: Compare the hydrogen content data with a preset hydrogen content threshold to obtain a first comparison result, and compare the temperature data with a preset temperature threshold to obtain a second comparison result;

[0042] S130: If the first comparison result indicates that the hydrogen content data is greater than or equal to a preset hydrogen content threshold and / or the second comparison result indicates that the temperature data is greater than or equal to a preset temperature threshold, acquiring image data of the generator room, and determining whether there is a person in the generator room based on the image data using image recognition technology;

[0043] Exemplarily, the hydrogen content data and the temperature data are first judged. If the first comparison result is used to characterize that the hydrogen content data is greater than or equal to a preset hydrogen content threshold and / or the second comparison result is used to characterize that the temperature data is greater than or equal to a preset temperature threshold, the image data of the generator room is then obtained. When both the hydrogen content data and the temperature data exceed the corresponding thresholds, it is proved that the generator room is safe, that is, there is no need to determine whether there is anyone in the generator room, and there is no need to obtain the image data of the generator room, thereby avoiding the data storage pressure caused by real-time acquisition of the image data of the generator room.

[0044] S140: If there is a person in the generator room, generate an alarm message;

[0045] S150: If there is no person in the generator room, control the gas spray device in the generator room to release flame-retardant gas to fill the generator room.

[0046] The system obtains hydrogen content data and temperature data of the generator room where the target generator is located; compares the hydrogen content data with a preset hydrogen content threshold to obtain a first comparison result, and compares the temperature data with a preset temperature threshold to obtain a second comparison result; if the first comparison result indicates that the hydrogen content data is greater than or equal to the preset hydrogen content threshold and / or the second comparison result indicates that the temperature data is greater than or equal to the preset temperature threshold, image data of the generator room is obtained, and image recognition technology is used to determine whether there is a person in the generator room based on the image data; if there is a person in the generator room, an alarm is generated; if there is no person in the generator room, the gas spray device in the generator room is controlled to release a flame-retardant gas to fill the generator room. By real-time monitoring of hydrogen content and temperature changes in the generator excitation side area, timely and effective fire prevention warnings are ensured when it is safe and unoccupied, thereby effectively preventing and addressing safety hazards caused by hydrogen leaks.

[0047] In a possible implementation manner, the step of obtaining hydrogen content data in a generator room where a target generator is located includes:

[0048] Acquiring initial hydrogen content data at different locations within the generator room to obtain an initial hydrogen content set;

[0049] The maximum value in the initial hydrogen content set is selected as the hydrogen content data in the generator room where the target generator is located.

[0050] Exemplarily, by obtaining initial hydrogen content data at different locations in the generator room and selecting the maximum value as the hydrogen content data in the generator room where the target generator is located, inaccurate detection results caused by uneven hydrogen distribution can be avoided, and failure in hydrogen leakage detection can be more reliably avoided.

[0051] In a possible implementation manner, the step of obtaining hydrogen content data in the generator room where the target generator is located further includes:

[0052] The average hydrogen content at different locations in the generator room is calculated based on the initial hydrogen content set, and the average hydrogen content is used as the hydrogen content data in the generator room where the target generator is located.

[0053] For example, when the generator room is large, in order to reduce the cost pressure brought by adding sensors, the average hydrogen content at different positions in the generator room is calculated as the hydrogen content data in the generator room where the target generator is located, thereby saving costs while ensuring reliable hydrogen leak detection.

[0054] In a possible implementation manner, the step of generating an alarm message if there is a person in the generator room includes:

[0055] If there is a person in the generator room, identifying the person's posture information based on the image data and a preset posture recognition model;

[0056] Alarm information is generated according to the posture information and preset alarm rules.

[0057] For example, different alarm information is generated for people in different postures, which is conducive to being applicable to more specific scenarios. Different alarm information is used for different specific scenarios, which helps staff to understand the safety status of the generator room in a timely manner.

[0058] In a possible implementation manner, the step of generating alarm information according to the posture information and preset alarm rules includes:

[0059] The posture information is matched with the preset posture information in the preset alarm rule. If the posture information is consistent with the preset posture information, an alarm message is generated according to a preset alarm mode corresponding to the preset posture information in the preset alarm rule.

[0060] Exemplarily, when the posture information of the person represents a lying posture, and the preset posture information in the preset alarm rule is also a lying posture, the alarm information is generated according to the preset alarm method corresponding to the lying posture in the preset alarm rule.

[0061] In a possible implementation manner, the step of generating alarm information according to a preset alarm mode corresponding to the preset posture information in the preset alarm rule includes:

[0062] generating an alarm instruction based on a warning mode in the preset alarm mode, wherein the warning mode includes at least one of a light warning and a sound warning;

[0063] The alarm information is generated according to the identification information of the preset alarm target in the preset alarm mode and the alarm instruction.

[0064] Exemplarily, when the posture information of a person represents a lying posture, the preset posture information in the preset alarm rule is also a lying posture, and the warning method in the preset alarm method adopts light warning and sound warning to wake up the person by light and sound. Since the alarm information may not be obtained when the posture information of the person represents a lying posture, and other people's help is needed, a preset alarm target is set. For example, the preset alarm target is set to a doctor, management personnel, etc., and the alarm information is generated according to the identification information of the preset alarm target and the alarm instruction, so that the alarm information is sent to the preset alarm target.

[0065] In a possible implementation manner, the method further includes:

[0066] When the hydrogen content data is less than a preset hydrogen content threshold and the temperature data is less than a preset temperature threshold, the gas spray device is controlled to be closed.

[0067] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A fire protection system for the excitation side of a generator, characterized in that: The system comprises: Target generator, hydrogen content sensor, gas spray device, visual pan / tilt / infrared temperature measurement device and control unit; The gas nozzle of the gas spray device is arranged at the top of the generator room where the target generator is located, and the gas spray device is used to release flame-retardant gas to fill the generator room; The hydrogen content sensor is arranged in the generator where the target generator is located; The visual PTZ / infrared temperature measuring device is arranged at the top of the generator room, and is used to obtain temperature data of the generator room, and is also used to obtain image data of the generator room; The control unit is respectively connected to the hydrogen content sensor, the gas spray device, and the visual pan / infrared temperature measuring device.

2. A generator excitation side fire protection system according to claim 1, characterized in that: The gas spray device includes at least two gas spray heads, and the gas spray heads are symmetrically arranged on both sides of the target generator.

3. A generator excitation side fire protection system according to claim 1, characterized in that: The gas nozzle is arranged at the top of the generator room where the target generator is located through a steering structure.

4. A generator excitation side fire protection system according to claim 1, characterized in that: The generator excitation side fire protection system includes at least two hydrogen content sensors, wherein a first hydrogen content sensor is arranged on the target generator, and a second hydrogen content sensor is arranged on a base of the target generator.

5. The generator excitation side fire protection system according to claim 1, characterized in that: The flame retardant gas is carbon dioxide gas.

6. A generator excitation side fire protection system according to claim 1, characterized in that: The control unit is connected to the hydrogen content sensor, the gas spray device, and the visual pan / tilt / infrared temperature measuring device respectively through wireless connection.

Images