Oil quality on-line monitoring system for speed regulation equipment of hydroelectric power plant

Abstract

The utility model relates to an on-line monitoring system for oil quality of speed regulation equipment of a hydroelectric power plant. An oil outlet guide pipe, an oil inlet guide pipe and a motor pump electrically connected with the oil outlet guide pipe are arranged on a system pipeline or an oil tank of the speed regulation equipment; the motor pump is used for extracting oil in a system pipeline or an oil tank of the speed regulation equipment from the oil outlet guide pipe and returning the oil back from the oil inlet guide pipe; the front-end monitoring sensor is arranged between the oil outlet guide pipe and the oil inlet guide pipe and used for collecting oil quality hardware indexes of the oil quality in real time; the display terminal is electrically connected with the front-end monitoring sensor and used for displaying monitoring data corresponding to the oil quality hardware indexes, and the data server is in communication connection with the display terminal and used for receiving the oil quality hardware indexes sent by the display terminal and determining the operation working condition and state of the speed regulation equipment according to the oil quality hardware indexes. According to the invention, the oil quality hardware index of the oil quality can be detected in real time under the condition of continuous operation of the equipment, so that the sampling period duration of monitoring can be reduced, the collected data volume can be increased, the monitoring timeliness can be improved, and accidents can be avoided and reduced.

Description

Technical Field

[0001] The present application relates to the technical field of water conservancy power generation data monitoring, and in particular to an online monitoring system for oil quality of speed regulating equipment in a hydropower plant. Background Art

[0002] During the operation of a hydropower station, the normal operation of speed regulating equipment such as turbines and auxiliary equipment is crucial to the production of electricity.

[0003] In actual operation, it is common for turbine units to be forced to shut down due to excessive lubricating oil pollution (particle size), and non-shutdown or output reduction events caused by auxiliary machine lubrication account for 26.7% of non-shutdown events throughout the year, which brings great losses to power generation companies.

[0004] In the related art, the method for monitoring the oil quality of speed control equipment is usually to manually collect oil quality hardware indicators such as viscosity, moisture and other parameters on a regular basis, and then use a computer to judge or predict the operating conditions and status of the speed control equipment based on the changes in parameters such as viscosity and moisture.

[0005] However, the monitoring methods in related technologies have long sampling cycles, limited data volumes, and insufficient real-time information. Utility Model Content

[0006] In order to solve or partially solve the problems existing in the related technology, the present application provides an online monitoring system for oil quality of speed regulating equipment in a hydroelectric power plant, which can solve the technical problems of long sampling cycle, limited data volume and insufficient real-time information in the monitoring method in the related technology.

[0007] The first aspect of the present application provides an online monitoring system for oil quality of a speed regulating equipment in a hydropower plant, comprising:

[0008] An oil outlet conduit, an oil inlet conduit and a motor pump electrically connected to the oil outlet conduit are arranged on the system pipeline or oil tank of the speed regulating device; the motor pump is used to extract the oil in the system pipeline or oil tank of the speed regulating device from the oil outlet conduit and return it through the oil inlet conduit;

[0009] A front-end monitoring sensor is disposed between the oil outlet conduit and the oil inlet conduit and is used to collect oil quality hardware indicators of the oil in real time;

[0010] The display terminal is electrically connected to the front-end monitoring sensor and is used to display the monitoring data corresponding to the oil quality hardware indicators:

[0011] The data server is connected to the display terminal for receiving the oil quality hardware index sent by the display terminal and determining the operating condition and status of the speed regulating device according to the oil quality hardware index.

[0012] In some embodiments, a remote monitoring module is also included, and the remote monitoring module is communicatively connected to the data server; the data server is also used to generate early warning information according to the set standard value of the oil quality hardware indicator and send it to the remote monitoring module, so that the display device of the remote monitoring module displays the early warning information.

[0013] In some embodiments, the front-end monitoring sensor specifically includes an oil moisture monitoring sensor, an oil quality monitoring sensor, an oil cleanliness sensor, and / or an acid value sensor.

[0014] In some embodiments, the front-end monitoring sensor also includes a sensing device wear sensor.

[0015] In some embodiments, a data gateway is provided between the display terminal and the data server, and the data server is communicatively connected with the display terminal via the data gateway.

[0016] In some embodiments, a sampling stop valve is provided between the oil outlet conduit and the front-end monitoring sensor.

[0017] In some embodiments, an oil return stop valve is provided between the oil inlet conduit and the front-end monitoring sensor.

[0018] The technical solution provided by this application may have the following beneficial effects:

[0019] The present application provides an online monitoring system for oil quality of speed regulating equipment in a hydroelectric power plant. Through a front-end monitoring sensor between an oil outlet conduit and an oil inlet conduit arranged on a system pipeline or oil tank of the speed regulating equipment, the oil quality hardware indicators of the oil can be detected in real time while the equipment is continuously running, thereby reducing the duration of the monitoring sampling cycle, increasing the amount of collected data, and improving the timeliness of monitoring, thereby avoiding and reducing the occurrence of accidents.

[0020] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0022] Figure 1 It is a structural schematic diagram of an online oil quality monitoring system for speed regulating equipment in a hydropower plant shown in an embodiment of the present application;

[0023] Figure 2It is a schematic diagram of the system architecture of an online oil quality monitoring system for speed regulating equipment in a hydroelectric power plant shown in an embodiment of the present application.

[0024] Reference numerals:

[0025] Speed ​​regulating device 1, oil tank 10, oil outlet conduit 11, oil inlet conduit 12, motor pump 13, front-end monitoring sensor 2, display terminal 3 and data server 4. DETAILED DESCRIPTION

[0026] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0027] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0028] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] There are some problems with oil quality analysis of turbines, the speed regulating equipment of hydropower stations. The main problems include long sampling cycles, limited data volume, and insufficient real-time information, which leads to single evaluation and operation and maintenance information, making it difficult to evaluate the status of equipment in real time and accurately predict its life. In addition, there is a lack of an effective data sharing platform, and monitoring data is limited to fault diagnosis and operation and maintenance, making it difficult to make forward-looking recommendations for production equipment. Turbines usually use high-performance lubricants to reduce wear, reduce friction, and cool and seal key components. These oils need to be monitored in real time and replaced in a timely manner to ensure that their performance is not affected.

[0031] Among them, moisture: Moisture will reduce the performance of lubricating oil and may cause corrosion and oxidation.

[0032] Contaminants: Contaminants in the oil, such as solid particles, metal fragments, chemicals, etc., need to be monitored and controlled in real time. These contaminants may come from mechanical wear, chemical reactions or external pollution sources.

[0033] Temperature: Controlling the temperature of the oil is critical to maintaining lubrication performance. High oil temperatures may cause oil breakdown and degradation.

[0034] During the operation of a hydropower station, the normal operation of the turbine is crucial to the production of electricity. Due to the high safety requirements of hydropower stations for equipment, it is necessary to monitor the operating status of the turbine and the relevant parameters of the lubricating oil in real time to ensure the availability of the equipment and reduce the potential risk of failure.

[0035] In actual operation, it is common for turbines to be forced to shut down due to excessive lubricating oil pollution (particle size), which brings great losses to power generation companies. As for auxiliary lubrication, in the statistics of non-stop shutdowns of domestic hydropower units in 2013, non-stop shutdowns or output reductions due to auxiliary lubrication accounted for 26.7% of the non-stop events throughout the year. Therefore, strengthening the management and monitoring of the oil system of turbines and their important auxiliary machines can prevent problems before they occur.

[0036] In order to solve these problems, the method of manual collection and analysis is obviously not applicable. Therefore, it is necessary to provide an online intelligent oil monitoring system with multiple parameters, high reliability and long life operation. This system can extend the oil change cycle, thereby saving time and economic costs for oil procurement, construction and waste oil treatment. In order to ensure the safe operation of the hydropower station and meet environmental requirements, the embodiment of the present application proposes an online monitoring system for oil quality of the speed regulating equipment of the hydropower plant.

[0037] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0038] Figure 1 It is a structural schematic diagram of an online oil quality monitoring system for speed regulating equipment in a hydroelectric power plant shown in an embodiment of the present application. Figure 2It is a schematic diagram of the system architecture of an online oil quality monitoring system for speed regulating equipment in a hydroelectric power plant shown in an embodiment of the present application.

[0039] See also Figure 1 , Figure 2 The present application discloses an online monitoring system for oil quality of a speed regulating device in a hydropower plant, comprising a speed regulating device 1, an oil tank 10, an oil outlet conduit 11, an oil inlet conduit 12, a motor pump 13, a front-end monitoring sensor 2, a display terminal 3 and a data server 4.

[0040] Two conduits can be provided on the system pipeline or oil tank of the speed control device 1, such as a turbine and auxiliary machine. One is an oil outlet conduit 11, which is used to extract oil, such as hydraulic oil, air compressor oil and turbine oil, and of course lubricating oil, from the above-mentioned system pipeline or oil tank; and the other is an oil inlet conduit 12, which is used to return the extracted oil to the above-mentioned system pipeline or oil tank.

[0041] Among them, lubricating oil is the "blood" of mechanical equipment. It plays an important role in sealing, lubricating, reducing friction, cooling, cleaning, reducing vibration and anti-corrosion in mechanical equipment. 80% of hidden dangers come from lubrication, and wear failure is the main cause of failure of large equipment. Based on the system of the embodiment of the present application, it is possible to timely grasp the early signs of abnormal operation or failure of the equipment, timely analyze the cause of the failure, take corresponding measures, eliminate the failure in the bud, and avoid and reduce the occurrence of major accidents.

[0042] The lubricating oil in use contains a wealth of information about the tribological state of the moving surface of the machine. Analysis of its performance and the wear-based products it carries can effectively evaluate the wear state of the machine. Monitoring the hardware indicators of oil quality is like "drawing blood" for the unit equipment. Using the most scientific and intuitive data can help the staff to find certain fault signals early, so as to perform maintenance in time, avoid failures, and extend the service life.

[0043] Based on this, the embodiment of the present application can improve the oil tank storing lubricating oil to monitor various hardware indicators of the lubricating oil in real time.

[0044] The motor pump 13 can pump the oil out of the oil inlet conduit and return it to the oil tank from the oil return conduit. A sampling stop valve is provided between the oil outlet conduit and the front-end monitoring sensor. A return oil stop valve is provided between the oil inlet conduit and the front-end monitoring sensor. The flow of the oil and the opening and closing of the conduit can be controlled.

[0045] In the embodiment of the present application, the monitoring system also has a housing, in which the front-end monitoring sensor can be arranged, and the housing can be arranged between the oil outlet conduit 11 and the oil inlet conduit 12, the first opening of the housing is connected to the oil outlet conduit 11, the second opening is connected to the oil inlet conduit 12, and a channel is arranged between the two openings, in which the front-end monitoring sensor is arranged. The oil quality hardware indicators of the oil quality can be collected in real time. The oil quality hardware indicators can include the water content of the oil, the quality of the oil, and the number of oil contamination particles.

[0046] The front-end monitoring sensor 2 may be an oil moisture monitoring sensor, an oil quality monitoring sensor, an oil cleanliness sensor, and / or an acid value sensor.

[0047] Among them, the oil tank is prone to water contamination due to breathing or pipeline seal failure, causing oil emulsification and oxidation, affecting the establishment of bearing oil film, and causing system corrosion. Therefore, the oil water monitoring sensor can use a sensor with thin film capacitance sensing technology, so that it can collect the water content in the oil in real time and monitor the change of water content in the turbine oil; the oil quality monitoring sensor can use a sensor with tuning fork resonance sensing technology, so as to monitor the viscosity change of the lubricating oil in real time during the operation of the equipment. The increase in oil viscosity can easily lead to difficulties in low-temperature starting of the unit and increased power loss; too low viscosity will cause the piston ring to be poorly sealed and the cylinder liner oil film thickness to be easily damaged, resulting in excessive wear. The oil cleanliness sensor can use the shading method to count the number of particles in different channels. It can directly reflect the cleanliness of the oil. Excessive pollution generally causes valve jamming, speed regulation effectiveness, inaccurate work and other adverse consequences.

[0048] The front-end monitoring sensor may also include an acid value sensor, which may monitor current oil acid value data.

[0049] The display terminal 3 in the embodiment of the present application can display the oil quality hardware indicators collected by the sensor in real time, so that the oil quality hardware indicators of the current oil quality of the debugging equipment can be checked at the equipment site.

[0050] The data server in the embodiment of the present application can be connected to the display terminal in communication. The data server can have the same functions as the computer in the related art, and can automatically analyze the oil quality hardware indicators to determine the operating conditions and status of the speed regulating equipment. The data server can be set up remotely, such as in a central control room, and can receive relevant monitoring data sent by the monitoring systems of multiple speed regulating equipment.

[0051] In the embodiment of the present application, a data gateway 5 is also provided, and the data gateway is used to realize the communication connection between the data server and the display terminal, and the IPV6 protocol can be adopted.

[0052] Since the embodiment of the present application can monitor online in real time through a front-end monitoring sensor between an oil outlet conduit and an oil inlet conduit arranged on the system pipeline or oil tank of the speed control device, the oil quality hardware indicators of the oil quality can be detected in real time while the equipment is continuously running, thereby reducing the monitoring sampling cycle duration, increasing the amount of collected data, and improving the timeliness of monitoring, thereby avoiding and reducing the occurrence of accidents.

[0053] In the embodiment of the present application, the monitoring system can be predictive maintenance and precise proactive maintenance. Instead of reducing the failure to "0", it detects the precursors of failure and proactively maintains it, thereby reducing equipment downtime and spare parts loss, and more importantly, saving labor losses and accelerated equipment scrapping due to downtime. More than 50% of equipment failures are caused by poor lubrication and equipment wear. Through reasonable oil testing and oil maintenance, nearly 40% of the replacement parts budget and 85% of the uncontrollable costs caused by downtime can be saved.

[0054] The embodiment of the present application may also include a remote monitoring module 6, which is connected to the data server in communication and can display the warning information after the data server generates the warning information. The threshold value can be manually set in the data server to set the standard value of the oil quality hardware index. When the oil quality hardware index collected in real time is higher than the standard value, the warning information can be automatically generated. The process of generating the warning information can refer to the mature technology in the prior art, which is not within the scope of protection of the present application.

[0055] In order to further monitor the operating status of the debugging equipment, an equipment wear sensor can also be provided to display the current wear condition of the equipment.

[0056] Of course, the wear sensor of the sensing device can be set in the above-mentioned front-end monitoring sensor to monitor the wear of the sensor and replace the sensor in time.

[0057] It can be seen that the present application installs the monitoring sensor directly on the system pipeline or oil tank while the equipment is continuously running, monitors the oil in real time during the working process, omits cumbersome operating procedures, avoids additional external pollution, and continuously and uninterruptedly monitors the viscosity, moisture, cleanliness and other parameters of the oil in use. The operating conditions and status of the system or equipment are determined or predicted based on the monitored parameters and changes of the lubricating oil, and abnormal components of the system or equipment are diagnosed, providing a basis for targeted maintenance and repairs. Therefore, it has important practical significance.

[0058] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of the various embodiments have their own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily required for the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application can be adjusted in order, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0059] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An online monitoring system for oil quality of speed regulating equipment in a hydropower plant, characterized in that: include: An oil outlet conduit, an oil inlet conduit and a motor pump electrically connected to the oil outlet conduit are arranged on the system pipeline or oil tank of the speed regulating device; the motor pump is used to extract the oil in the system pipeline or oil tank of the speed regulating device from the oil outlet conduit and return it through the oil inlet conduit; A front-end monitoring sensor, located between the oil outlet conduit and the oil inlet conduit, is used to collect oil quality hardware indicators of the oil in real time; The display terminal is electrically connected to the front-end monitoring sensor and is used to display the monitoring data corresponding to the oil quality hardware indicators: The data server is connected to the display terminal for receiving the oil quality hardware index sent by the display terminal and determining the operating condition and status of the speed regulating device according to the oil quality hardware index.

2. The system according to claim 1, characterized in that It also includes a remote monitoring module, which is in communication with the data server; the data server is also used to generate early warning information according to the set standard value of the oil quality hardware indicator and send it to the remote monitoring module, so that the display device of the remote monitoring module displays the early warning information.

3. The system according to claim 1 or 2, characterized in that: The front-end monitoring sensor specifically includes an oil moisture monitoring sensor, an oil quality monitoring sensor, an oil cleanliness sensor, and / or an acid value sensor.

4. The system according to claim 1 or 2, characterized in that: It also includes an equipment wear sensor, which is arranged on the speed regulating device and is electrically connected to the display terminal.

5. The system according to claim 1, characterized in that A data gateway is provided between the display terminal and the data server, and the data server is communicatively connected with the display terminal via the data gateway.

6. The system according to claim 1, characterized in that A sampling stop valve is arranged between the oil outlet conduit and the front-end monitoring sensor.

7. The system according to claim 1, characterized in that An oil return stop valve is arranged between the oil inlet conduit and the front end monitoring sensor.

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