CN113982808A - System and method for monitoring running state of mixed-flow hydraulic generator - Google Patents
System and method for monitoring running state of mixed-flow hydraulic generator Download PDFInfo
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- CN113982808A CN113982808A CN202111240030.6A CN202111240030A CN113982808A CN 113982808 A CN113982808 A CN 113982808A CN 202111240030 A CN202111240030 A CN 202111240030A CN 113982808 A CN113982808 A CN 113982808A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000004891 communication Methods 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000013307 optical fiber Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 abstract description 5
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 239000003550 marker Substances 0.000 description 12
- 238000012545 processing Methods 0.000 description 5
- 239000013589 supplement Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/008—Measuring or testing arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention discloses a system for monitoring the running state of a mixed-flow hydraulic generator, which comprises a data communication unit, wherein the data communication unit is respectively connected with an image acquisition unit, a server and a user side. The invention also discloses a monitoring method for monitoring the running state of the mixed-flow hydraulic generator, which can acquire the running image of the main shaft of the mixed-flow hydraulic generator and the liquid level image of the water collecting well on line in real time and detect the rotating speed of the main shaft and the oil leakage condition of the generator, thereby realizing the monitoring of the running state of the hydraulic generator. The invention provides an effective method for ensuring the safe and stable operation of the generator and timely discovering the abnormal operation state of the generator set.
Description
Technical Field
The invention belongs to the technical field of hydroelectric power generation detection, relates to a system for monitoring the running state of a mixed-flow hydraulic generator, and further relates to a monitoring method of the monitoring system.
Background
With the steady increase of the economy of China, the demand of the whole society on electric power is gradually enlarged, and the stable operation of the life of the social economy is directly influenced by guaranteeing the safety of the electric power. The hydroelectric generating set is used as main equipment for generating electric energy of a hydropower station, and has important significance for ensuring safe and stable operation of the hydroelectric generating set, timely finding abnormal operation state of the hydroelectric generating set and the like to ensure continuous and stable power generation of the hydropower station.
The method for guaranteeing the safe and stable operation of the hydraulic turbine unit is an important link of the safe production work of electric power, the current method for monitoring the running state of the hydraulic turbine unit is based on manual field observation and subjective judgment, the judgment method is low in efficiency, and omission easily occurs. The monitoring method based on the non-image technology needs to additionally install various auxiliary devices on the unit, and the method is complex in implementation and influences the normal operation of the unit. In order to improve the detection efficiency and detect the operation state of the unit more comprehensively and efficiently, a new monitoring method is urgently needed.
Disclosure of Invention
The invention aims to provide a system for monitoring the running state of a mixed-flow hydraulic generator, which can acquire images of the main shaft of the mixed-flow hydraulic generator and the liquid level of a water collecting well in real time on line and monitor the running state of the hydraulic generator.
The invention also provides a method for monitoring the running state of the mixed-flow hydraulic generator.
The invention adopts a first technical scheme that the system for monitoring the running state of the mixed-flow hydraulic generator comprises a data communication unit, wherein the data communication unit is respectively connected with an image acquisition unit, a server and a user side.
The first technical scheme of the invention is also characterized in that:
the number of the image acquisition units is three, wherein two image acquisition units are used for acquiring images of the hydraulic turbine generator set; and the other image acquisition unit is used for acquiring a water surface image of the water collecting well.
The three image acquisition units have the same structure and respectively comprise a camera module, the camera module is respectively connected with the control module and the power module, and the control module is also connected with the power module.
The camera module includes the cloud platform, is equipped with the camera on the cloud platform, and the below of cloud platform is equipped with the light filling lamp.
The data communication unit comprises a photoelectric conversion module A, a photoelectric conversion module B and a switch which are sequentially connected, the photoelectric conversion module A is respectively connected with the three image acquisition units, and the switch is connected with the server.
The invention adopts a second technical scheme that the method for monitoring the running state of the mixed-flow hydraulic generator specifically comprises the following steps:
step 2, installing another image acquisition unit at the upper end edge wall of the water collecting well, leading the data transmission line to a photoelectric conversion module A by the image acquisition unit through an rj45 interface by using a twisted pair, and connecting the image acquisition unit with an external power supply by using a 220V circuit through a power supply module of the image acquisition unit to supply power for the whole image acquisition unit;
The invention has the beneficial effects that: the invention provides a system and a method for monitoring the running state of a mixed-flow hydraulic generator, which firstly realize the automatic acquisition of the real-time running image of a main shaft of the hydraulic generator on the running site, measure the running speed of the main shaft, judge the running state (static, rotating and abnormal rotating speed) of the main shaft, analyze and detect whether oil stains exist by acquiring the liquid level image of a water collecting well, and further judge whether an oil leakage occurs in a generator set. Compared with the traditional manual monitoring scheme, the real-time online monitoring and automatic alarming functions are realized. For other rotation speed detection schemes without image recognition, if a laser characteristic reflection mode is adopted, a specific material needs to be implanted into a moving object to serve as a difference reflection element so as to realize rotation speed detection. The image recognition scheme adopted by the invention reduces the implanted interference to the unit by means of an AI technology, thereby realizing less or no modification to the unit or additional installation of other auxiliary equipment.
Drawings
FIG. 1 is a schematic structural diagram of a system for monitoring the operating condition of a mixed-flow hydraulic generator according to the present invention;
FIG. 2 is a schematic structural diagram of an image acquisition unit in the system for monitoring the running state of the mixed-flow hydraulic generator according to the invention;
fig. 3 is a schematic structural diagram of a camera module in the system for monitoring the running state of the mixed-flow hydraulic generator according to the invention;
fig. 4 is a schematic structural diagram of a data communication unit in the system for monitoring the running state of the mixed-flow hydraulic generator.
In the figure, 1, an image acquisition unit, 1-1, a camera module, 1-1-1, a holder, 1-1-2, a camera, 1-1-3, a light supplement lamp, 1-1-4, a waterproof fog structure and 1-1-5, a wall;
1-2, a control module, 1-3, a power module,
2. the system comprises a data communication unit, 2-1 photoelectric conversion modules A, 2-2 photoelectric conversion modules B, 2-3 switches;
3. and 4, a server and a user side.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses a system for monitoring the running state of a mixed-flow hydraulic generator, and the overall structure of the system is shown in figure 1. Firstly, the monitored objects are the main shaft of the mixed-flow type hydraulic generator set and the water surface of the water collecting well. The monitoring system is composed of an image acquisition unit 1, a data communication unit 2, a server 3 and a user terminal 4.
The system comprises three image acquisition units 1, wherein two image acquisition units are used for acquiring images of a main shaft of a hydraulic generator set, and the other image acquisition unit 1 is used for acquiring images of the water surface of a water collecting well;
the three image capturing units 1 have the same structure, and as shown in fig. 2, each image capturing unit has the structure: the camera module comprises a camera module 1-1, wherein the camera module 1-1 is respectively connected with a control module 1-2 and a power module 1-3, and the control module 1-2 is also connected with the power module 1-3.
As shown in fig. 3, the camera module 1-1 includes a cradle head 1-1-1, the cradle head 1-1-1 is provided with a camera 1-1-2, a light supplement lamp 1-1-3 is arranged below the cradle head 1-1-1, and the cradle head 1-1-1 and the light supplement lamp 1-1-3 are both mounted on a wall 1-1-5;
the camera 1-1-2 is provided with a waterproof fog structure 1-1-4;
as shown in fig. 4, the data communication unit 2 is composed of a communication line, a photoelectric conversion module, and a switch, and establishes a communication connection between the server host and the image acquisition unit to realize transmission of field image data.
The photoelectric conversion module comprises a photoelectric conversion module A2-1 and a photoelectric conversion module B2-2, wherein the photoelectric conversion module A2-1 is connected with a camera 1-1-2 in the image acquisition unit 1 through a twisted pair by an rj45, and the photoelectric conversion module A2-1 is connected with the photoelectric conversion module B2-2 through an optical fiber interface by using an optical fiber circuit;
the photoelectric conversion module B2-2 is connected with the switch 2-3 through an rj45 interface by a twisted pair;
the switch 2-3 is connected with the host computer of the server 3 through an rj45 interface by a twisted pair;
the photoelectric conversion module A2-1, the photoelectric conversion module B2-2 and the switch 2-3 are all connected with an external power supply.
The image acquisition unit 1 is connected with a photoelectric conversion module A2-1 and a photoelectric conversion module B2-2 in the data communication unit 2 through a rj45 interface by a twisted pair, so that data transmission between the image acquisition unit 1 and the data communication unit 2 is realized; the power supply module 1-3 is connected with an external power supply system to provide power for the image acquisition unit 1; the camera 1-1-2 is used for acquiring a field real-time image of the main shaft of the mixed flow type hydraulic generator set and the liquid level of the water collection well.
The server 3 is divided into a database server and a set running state monitoring system Web server, and is composed of a server host, a data storage device and software (program) loaded on the server, wherein the software is the server program. The server host is connected with the image acquisition unit through the communication unit to acquire the on-site real-time image information of the main shaft of the unit and the water surface of the water collection well, the image data information is processed by using a loaded algorithm program, and the acquired real-time image data and the processing result are stored in a database. The database is divided into a unit information database, a main shaft rotating speed database, a main shaft image screen database, an oil level monitoring database, a historical database, a rotating speed abnormity alarm database, an oil leakage alarm database and other databases.
The user end 4 is composed of a plurality of computer users, and is composed of a computer host, a display and user software loaded on the computer host, and the software is a man-machine interaction interface program. The interactive interface consists of a user login interface, a certain hydropower plant interface, a generator plant interface, a monitored generator unit interface, a real-time alarm interface, a historical data interface, various report interfaces, a video monitoring interface, a parameter setting interface and other interfaces.
The invention discloses a monitoring method of a system for monitoring the running state of a mixed-flow hydraulic generator, which comprises the following specific processes:
the system monitors the running state of the mixed-flow hydraulic generator by using an intelligent image recognition technology, and the specific implementation method is to install the system. The method comprises the following steps that two image acquisition units 1 for acquiring the main shaft images of the mixed-flow hydraulic generator set are respectively arranged on walls 1-1-5 in a water guide bearing chamber and are used for acquiring the main shaft images of the mixed-flow hydraulic generator set;
the mounting height and the angle of the two image acquisition units 1 can enable the main shaft of the mixed-flow hydraulic generator set to be within the shooting angle range, the cameras 1-1-2 in the two image acquisition units 1 are distributed at two ends of a radial line along the diameter direction of the main shaft of the mixed-flow hydraulic generator set, and the included angle is 180 degrees.
Indoor light is weaker, indoor brightness is enhanced by installing the light supplement lamp 1-1-3, and meanwhile, in order to avoid metal reflection on the surface of a main shaft body of the mixed-flow hydraulic generator unit from interfering with image acquisition of the camera, the light supplement lamp 1-1-3 and the camera 1-1-2 are required to form a 30-60 degree angle when being installed.
The humidity of the main shaft chamber is high, water vapor condensation is easily formed on the surface of the camera lens, and the waterproof fog structure 1-1-4 is installed to eliminate influence.
The third image acquisition unit 1 is used for acquiring water surface images of the water collecting well and is arranged on the upper end edge wall of the water collecting well.
The single image acquisition unit 1 respectively leads a data transmission line to the photoelectric conversion module A2-1 through an rj45 interface by using a twisted pair, and a power supply module 1-3 in the image acquisition unit 1 is connected with an external power supply by using a 220V circuit to supply power to the whole image acquisition unit 1.
The server 3 is installed in a main control room for running of the unit, the server 3 is connected with the three image acquisition units 1 through optical fibers, and working power supplies of the server 3 are all provided by external power supplies.
The computer of the user terminal 4 is connected with the server 3, and the resources of the server 3 are accessed through the software of the user terminal 4, so that the running information of the unit can be mastered.
After the external power supply is connected, the system starts to operate. Firstly, computers in the image acquisition unit 1, the server 3 and the user terminal 4 complete self-starting and initialization work, detect whether each device of the system is in a normal working state or not, and then the image acquisition unit 1 and the server 3 establish communication connection.
The three image acquisition units 1 start to acquire real-time images of a main shaft of the on-site mixed-flow hydraulic generator set, wherein two image acquisition units 1 acquire the images of the main shaft of the mixed-flow hydraulic generator set, and the other image acquisition unit 1 acquires water surface images of a water collecting well and uploads the real-time image data to the server 3;
the server 3 firstly stores the real-time data into corresponding databases respectively, namely stores the main shaft image data of the mixed-flow hydraulic generator set, which are acquired by the two image acquisition units 1, into a main shaft image view screen library, and stores the water surface image of the acquired water collecting well, which is acquired by the other image acquisition unit 1, into an oil surface monitoring database; then processing the image data respectively, firstly, dynamically capturing the marker (the dynamic capturing process is that firstly, a model of the marker is established, the model is used for finding the region with the highest similarity in the image and determining the region as the target region, thus completing the positioning of the marker, secondly, the target is separated from the background image, the position of the marker is determined, after the initial position and size of the marker are determined, the position and size of the subsequent target can be predicted by utilizing a depth learning algorithm after training a sample, thereby realizing the accurate dynamic capturing of the marker), then counting, timing and speed measuring are carried out, (the continuous operation image of the main shaft rotation is collected, the moving images shot at two different moments are processed, and the position where the marker appears is calculated, determining the distance the marker moves over the image during the two time intervals, thereby determining the speed at which the image moves; the method specifically comprises the following steps: a main shaft operation image acquisition unit can shoot a video image of a main shaft half cycle (namely, a half of the main shaft, the visual angle is 180 degrees), a marker disappears from a picture at any moment, namely, the main shaft rotates for a half cycle, the number p of images shot by the acquisition unit from the appearance moment to the disappearance moment of the marker can be obtained by carrying out frame analysis on continuous video images, and the sampling frequency fs of the image acquisition unit 1 is known, and the reciprocal of the sampling frequency is the time t1 used for shooting a single image. The time taken for the marker to disappear from appearance (i.e., the time taken for the marker to rotate half a cycle) t2 ═ pt1 can then be determined; the time of one rotation is t2 which is twice, the rotation speed n of the main shaft is 1/t2 multiplied by 60, the operation speed of the main shaft of the mixed flow type hydraulic generator set is accessed in real time, and the operation state of the main shaft of the mixed flow type hydraulic generator set is judged (the judgment is carried out according to the measured rotation speed of the main shaft). Different states correspond to different rotating speed values, for example, when the rotating speed is 0, the main shaft is in a static state; and when the rotating speed exceeds a set threshold value, the abnormal state is determined. ) Storing the result into a rotating speed database; the method comprises the steps of sequentially carrying out image filtering and image processing on a water surface image of a water collecting well (carrying out frame analysis on a collected video screen image, and then carrying out graying, equalization, filtering, contrast enhancement, binarization processing and binary image filtering processing in sequence), carrying out feature extraction on the basis of the above steps, judging whether oil stains exist on the water surface (the gray value (brightness) of pixel points at the oil stain position in the collected water collecting well liquid surface image is different from other water surface positions (namely an oil stain-free coverage area), and the pixel point number of the oil stain position is increased along with the increase of oil leakage amount).
A worker logs in through software of the user terminal 4 to obtain related information of the operation of the mixed-flow hydraulic generator set, and after the system successfully logs in, different interfaces can be accessed according to requirements to obtain corresponding information.
Claims (6)
1. The utility model provides a system for be used for mixed flow hydraulic generator running state to monitor which characterized in that: the system comprises a data communication unit, wherein the data communication unit is respectively connected with an image acquisition unit, a server and a user side.
2. The system for monitoring the operating condition of the mixed-flow hydraulic generator according to claim 1, wherein: the number of the image acquisition units is three, wherein two image acquisition units are used for acquiring images of the hydraulic turbine generator set; and the other image acquisition unit is used for acquiring a water surface image of the water collecting well.
3. The system for monitoring the operating condition of the mixed-flow hydraulic generator according to claim 2, wherein: the three image acquisition units have the same structure and respectively comprise a camera module, the camera module is respectively connected with the control module and the power module, and the control module is also connected with the power module.
4. The system for monitoring the operating condition of the mixed-flow hydraulic generator according to claim 3, wherein: the camera module includes the cloud platform, is equipped with the camera on the cloud platform, and the below of cloud platform is equipped with the light filling lamp.
5. The system for monitoring the operating condition of the mixed-flow hydraulic generator according to claim 3, wherein: the data communication unit comprises a photoelectric conversion module A, a photoelectric conversion module B and a switch which are sequentially connected, the photoelectric conversion module A is respectively connected with the three image acquisition units, and the switch is connected with the server.
6. The monitoring method for the system for monitoring the running state of the mixed-flow hydraulic generator according to any one of claims 1 to 5, wherein the monitoring method comprises the following steps: the method specifically comprises the following steps:
step 1, respectively installing two image acquisition units on a wall in a water guide bearing chamber to acquire images of a main shaft of a mixed-flow hydraulic generator set, wherein cameras in the two image acquisition units are distributed at two ends of a radial line along the diameter direction of the main shaft of the mixed-flow hydraulic generator set, and an included angle is 180 degrees;
step 2, installing another image acquisition unit at the upper end edge wall of the water collecting well, leading the data transmission line to a photoelectric conversion module A by the image acquisition unit through an rj45 interface by using a twisted pair, and connecting the image acquisition unit with an external power supply by using a 220V circuit through a power supply module of the image acquisition unit to supply power for the whole image acquisition unit;
step 3, installing a server in a main control room for running of the mixed-flow hydraulic generator set, wherein the server is connected with the image acquisition unit through an optical fiber; and the computer of the user side is connected with the server, and the server resources are accessed through user side software, so that the running information of the mixed-flow hydraulic generator set is obtained.
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| CN202111240030.6A CN113982808A (en) | 2021-10-25 | 2021-10-25 | System and method for monitoring running state of mixed-flow hydraulic generator |
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