A method and system for early warning of air cooler opening of a hydro-generator set

Abstract

The present invention discloses a method and system for warning the opening of an air cooler of a hydro-turbine generator set, belonging to the technical field of detection of hydro-turbine generator sets. First, a shutter opening warning analysis model is constructed based on the air cooler shutter opening values ​​under various operating conditions of the hydro-turbine generator set, and a temperature warning analysis model is constructed based on the temperature values ​​of the gas before passing through the air cooler and the temperature values ​​of the gas after cooling through the air cooler under various operating conditions of the hydro-turbine generator set; then, the temperature values ​​of the gas before and after passing through the air cooler are collected in real time, and the established temperature warning analysis model is used for judgment. Due to the error problem of temperature sensor collection, the temperature warning information at this time may contain erroneous warnings, so it is necessary to introduce an air cooler shutter warning analysis on the basis of the temperature warning analysis, and finally realize the warning of the air cooler shutter opening. The present invention effectively avoids the problems of inaccurate monitoring and false alarms in the existing technology, and ensures the safe operation of the hydro-turbine generator set.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydro-generator set detection, and in particular relates to a hydro-generator set air cooler opening degree early warning method and system. Background Art

[0002] With the continuous adjustment of the energy structure, hydropower energy has become an important part of building a modern multifunctional, complementary, supply-demand coordinated smart energy system. Vigorously developing hydropower energy plays a great strategic role in promoting green and low-carbon energy development, improving energy supply capacity and optimizing energy layout. As the core equipment for energy conversion in hydropower stations, hydropower generator sets are developing towards gigantism, complexity and intelligence.

[0003] An air cooler (AC) is a crucial heat exchange device in the operation of a hydro-turbine generator set and a vital component for ensuring its safe operation. It primarily consists of a tube bundle, tube box, fan, louvers, and a frame. Its operating principle is to use ambient air as the cooling medium, passing across the finned tubes to cool or condense the high-temperature process fluid within.

[0004] In the existing technology, the monitoring of the operating temperature of the air cooler is mainly achieved by using sensor probes, which mainly have problems such as inaccurate monitoring and false alarms, thereby affecting the working control of the air cooler and even threatening the safe operation of the hydro-generator set, causing damage to the hydro-generator set. Summary of the Invention

[0005] In order to solve the defects existing in the above-mentioned prior art, the purpose of the present invention is to provide a method and system for early warning of the opening of an air cooler of a hydro-turbine generator set, which realizes an early warning of the opening of the shutters based on the temperature warning, effectively avoiding the problems of inaccurate monitoring and false alarms existing in the prior art, which threaten the safe operation of the hydro-turbine generator set and cause damage to the hydro-turbine generator set.

[0006] The present invention is achieved through the following technical solutions:

[0007] A method for early warning of the opening degree of an air cooler of a hydro-generator unit, comprising:

[0008] S1: Obtain the shutter opening value of the air cooler under various operating conditions of the hydro-generator unit and build a shutter opening early warning analysis model;

[0009] S2: Obtain the temperature values ​​of the gas before and after passing through the air cooler under various operating conditions of the hydro-generator set, and construct a temperature early warning analysis model;

[0010] S3: The temperature values ​​of the gas before and after passing through the air cooler are collected in real time and input into the temperature warning analysis model. If the collected temperature value is greater than the temperature warning threshold preset by the temperature warning analysis model, a temperature warning message is output and S4 is executed. If the collected temperature value is not greater than the temperature warning threshold preset by the temperature warning analysis model, S5 is executed.

[0011] S4: Adjust the air cooler shutter opening and execute S5;

[0012] S5: Collect the shutter opening value in real time, input the shutter opening value into the shutter opening warning analysis model, and output the shutter opening warning information if the collected shutter opening value is greater than the opening warning threshold preset by the shutter opening warning analysis model.

[0013] Preferably, in S1, the air cooler shutter opening value is historical data stored in a database.

[0014] Preferably, in S2, the temperature value of the gas before passing through the air cooler and the temperature value of the gas after being cooled by the air cooler are historical data stored in the database.

[0015] Preferably, in S3, the temperature values ​​of the gas before and after passing through the air cooler are collected by a temperature sensor.

[0016] Preferably, in S5, the air cooler shutter opening is collected by an opening sensor.

[0017] The present invention discloses an air cooler opening warning system for a hydro-generator set, comprising:

[0018] A database module stores the air cooler shutter opening value, the temperature value of the gas before passing through the air cooler, and the temperature value of the gas after being cooled by the air cooler under various operating conditions of the hydro-generator set;

[0019] Model building module, building shutter opening warning analysis model and temperature warning analysis model;

[0020] Real-time signal acquisition module, real-time acquisition of temperature signal value and shutter opening value;

[0021] Central processing unit, information processing, program running;

[0022] Early warning information module, outputs early warning information.

[0023] Preferably, a data processing module is further provided between the real-time signal acquisition module and the central processing unit, and the data processing module is used to process the real-time acquired signal.

[0024] Preferably, the real-time signal acquisition module includes a first temperature sensor for collecting the temperature of the gas before being cooled by the air cooler, a second temperature sensor for collecting the temperature of the gas after being cooled by the air cooler, and an opening sensor for collecting the opening value of the air cooler shutter.

[0025] Preferably, the early warning information module issues an early warning via text message, phone call, email and / or sound and light alarm.

[0026] Preferably, the central processing unit is a PLC or a DCS.

[0027] Compared with the prior art, the present invention has the following beneficial technical effects:

[0028] The present invention discloses a method for early warning of the opening degree of an air cooler of a hydro-turbine generator set. First, a shutter opening early warning analysis model is constructed based on the air cooler shutter opening values ​​under various operating conditions of the hydro-turbine generator set. A temperature early warning analysis model is constructed based on the temperature values ​​of the gas before and after passing through the air cooler under various operating conditions of the hydro-turbine generator set. Then, the temperature values ​​of the gas before and after passing through the air cooler are collected in real time and judged using the established temperature early warning analysis model. Due to the error problem of temperature sensor collection, the temperature early warning information at this time may contain erroneous warnings. Therefore, it is necessary to introduce an early warning analysis of the air cooler shutter on the basis of the temperature early warning analysis, and finally achieve early warning of the air cooler shutter opening. The method combines the shutter opening early warning analysis model and the temperature early warning analysis model. Based on historical data under various operating conditions of the hydro-turbine generator set, the two models provide early warnings of the operating conditions of the air cooler through the two dimensions of temperature and shutter opening. The method achieves early warning of the shutter opening on the basis of the temperature early warning, effectively avoiding the problems of inaccurate monitoring and false alarms in the prior art and ensuring the safe operation of the hydro-turbine generator set.

[0029] The hydraulic generator set air cooler opening warning system disclosed by the present invention has simple construction, high automation, compatibility with existing system hardware, and wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the method flow of the present invention;

[0031] Figure 2 This is a system structure diagram of the present invention. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, which are intended to explain the present invention rather than to limit it.

[0033] like Figure 2The air cooler opening warning system for a hydro-turbine generator set of the present invention mainly includes a central processing unit, a database module, a model construction module, a real-time signal acquisition module, a warning information module and a data processing module. Through the above functional modules, an early warning system with a shutter opening warning analysis model and a temperature warning analysis model as the core is constructed, thereby effectively avoiding the inaccurate monitoring and false alarms existing in the prior art, which threaten the safe operation of the hydro-turbine generator set.

[0034] The central processing unit is mainly used for information processing, program running, etc. The collected or stored data is processed and retrieved by the central processing unit.

[0035] The database module is used to store the air cooler shutter opening value, the temperature value of the gas before passing through the air cooler, and the temperature value of the gas after cooling through the air cooler under various operating conditions of the hydro-generator set; in addition, the database module also stores the collected real-time data and identifies and classifies these data in the database.

[0036] The model building module is primarily used to construct a shutter opening warning analysis model and a temperature warning analysis model. The data used to construct these models comes from a database containing historical data on the air cooler shutter opening values, the gas temperature before and after the air cooler, and the various operating conditions of the hydro-generator set. Both the shutter opening warning analysis model and the temperature warning analysis model can utilize conventional data analysis models, differing in their data sources and warning analysis objectives. Conventional data analysis models, based on raw data, are well known to those skilled in the art, from dataset construction and splitting, model training, model evaluation, to model output and release, and are therefore not detailed here.

[0037] A real-time signal acquisition module is used to collect temperature signal values ​​and shutter opening values. The collected real-time signal values ​​are input into the above-mentioned early warning analysis model to output early warning analysis results. In this embodiment, the real-time signal acquisition module includes a first temperature sensor for collecting the gas temperature before cooling by the air cooler, a second temperature sensor for collecting the gas temperature after cooling by the air cooler, and an opening sensor for collecting the air cooler shutter opening value.

[0038] The data processing module is used to process the real-time collected signals to ensure the accuracy of subsequent early warning analysis, including amplifiers, digital filters, A / D converters, etc.

[0039] The warning information module is primarily used to output warning information. Real-time collected signals are analyzed by the blinds opening warning analysis model and the temperature warning analysis model. If a warning condition is triggered, the warning information module outputs a warning message. In this embodiment, the warning information module issues warnings via text message, phone call, email, and / or audible and visual alarms.

[0040] like Figure 1 As shown, this embodiment provides a method for early warning of the opening degree of an air cooler of a hydro-generator set, comprising the following steps:

[0041] Step 1: Obtain the shutter opening value of the air cooler under various operating conditions of the hydro-generator set and build a shutter opening early warning analysis model;

[0042] Step 2: Obtain the temperature value of the gas before passing through the air cooler and the temperature value of the gas after being cooled by the air cooler under various operating conditions of the hydro-generator set, and construct a temperature early warning analysis model; the above-mentioned air cooler shutter opening value and the temperature value of the gas before passing through the air cooler and the temperature value of the gas after being cooled by the air cooler are all historical data values ​​stored in the database, and the data values ​​can be theoretical data values ​​required for the technical indicators of the air cooler when the hydro-generator set is designed, or they can be values ​​collected during the operation of the hydro-generator set and then corrected;

[0043] Step 3: Real-time collection of the temperature values ​​of the gas before and after passing through the air cooler and input into the temperature warning analysis model. If the collected temperature value is greater than the temperature warning threshold preset by the temperature warning analysis model, the temperature warning information is output and step 4 is executed. Otherwise, step 5 is executed. The temperature values ​​before and after the air cooler are collected by the temperature sensor. Due to the error problem of temperature sensor collection, the temperature warning information at this time may contain erroneous warnings. Therefore, it is necessary to introduce the warning analysis of the air cooler shutter on the basis of the temperature warning analysis, and the two are implemented in combination. The warning information is output through SMS, phone, email and / or sound and light alarms.

[0044] Step 4: If a temperature warning occurs (not a false alarm), it indicates that the cooling effect of the air cooler on the hydro-generator set is out of balance. At this time, adjust the air cooler shutter opening and execute step 5;

[0045] Step 5 has two scenarios. First, after executing step 4, executing step 5 again, collects the shutter opening value in real time and inputs it into the shutter opening warning analysis model. If the collected shutter opening value does not reach the warning value, it indicates that the air cooler shutter is at a normal opening and the temperature warning is false (e.g., due to temperature sensor damage, inaccurate detection value, etc.). If the collected shutter opening value exceeds the opening warning threshold preset by the shutter opening warning analysis model, a shutter opening warning message is output. Second, after executing step 3, executing step 5 again, if the temperature warning message is not triggered, if the collected shutter opening value does not reach the warning value, it indicates that the air cooler shutter is at a normal opening and the equipment is operating normally. If the collected shutter opening value exceeds the opening warning threshold preset by the shutter opening warning analysis model, a shutter opening warning message is output. The warning message is output via text message, phone call, email, and / or audible and visual alarm.

[0046] It should be noted that the above is only part of the embodiments of the present invention. Equivalent changes made to the system described in the present invention are all included in the scope of protection of the present invention. Those skilled in the art of the present invention may make similar substitutions for the specific examples described, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, and all such substitutions are within the scope of protection of the present invention.

Claims

1. A method for early warning of the opening degree of an air cooler of a hydro-generator set, characterized in that: include: S1: Obtain the shutter opening value of the air cooler under various operating conditions of the hydro-generator unit and build a shutter opening early warning analysis model; S2: Obtain the temperature values ​​of the gas before and after passing through the air cooler under various operating conditions of the hydro-generator set, and construct a temperature early warning analysis model; S3: The temperature values ​​of the gas before and after passing through the air cooler are collected in real time and input into the temperature warning analysis model. If the collected temperature value is greater than the temperature warning threshold preset by the temperature warning analysis model, a temperature warning message is output and S4 is executed. If the collected temperature value is not greater than the temperature warning threshold preset by the temperature warning analysis model, S5 is executed. S4: Adjust the air cooler shutter opening and execute S5; S5: Collect the shutter opening value in real time, input the shutter opening value into the shutter opening warning analysis model, and output the shutter opening warning information if the collected shutter opening value is greater than the opening warning threshold preset by the shutter opening warning analysis model.

2. The method for early warning of the opening degree of the air cooler of a hydro-generator set according to claim 1, characterized in that: In S1, the air cooler shutter opening value is the historical data stored in the database.

3. The method for early warning of the opening degree of the air cooler of a hydro-generator set according to claim 1, characterized in that: In S2, the temperature value of the gas before passing through the air cooler and the temperature value of the gas after being cooled by the air cooler are historical data stored in the database.

4. The method for early warning of the opening degree of the air cooler of a hydro-generator set according to claim 1, characterized in that: In S3, the temperature values ​​of the gas before and after passing through the air cooler are collected by the temperature sensor.

5. The method for early warning of the opening degree of the air cooler of a hydro-generator set according to claim 1, characterized in that: In S5, the air cooler shutter opening is collected by the opening sensor.

6. A water turbine generator air cooler opening warning system, characterized in that: include: A database module stores the air cooler shutter opening value, the temperature value of the gas before passing through the air cooler, and the temperature value of the gas after being cooled by the air cooler under various operating conditions of the hydro-generator set; Model building module, building shutter opening warning analysis model and temperature warning analysis model; Real-time signal acquisition module, real-time acquisition of temperature signal value and shutter opening value; Central processing unit, information processing, program running; Early warning information module, outputs early warning information.

7. The hydro-generator air cooler opening warning system according to claim 6, characterized in that: A data processing module is also provided between the real-time signal acquisition module and the central processing unit, and the data processing module is used to process the real-time acquired signals.

8. The hydro-generator air cooler opening warning system according to claim 6, characterized in that: The real-time signal acquisition module includes a first temperature sensor for collecting the temperature of the gas before being cooled by the air cooler, a second temperature sensor for collecting the temperature of the gas after being cooled by the air cooler, and an opening sensor for collecting the opening value of the air cooler shutter.

9. The hydro-generator air cooler opening warning system according to claim 6, characterized in that: The early warning information module issues early warnings via text messages, phone calls, emails, and / or sound and light alarms.

10. The hydro-generator air cooler opening warning system according to claim 6, characterized in that: The central processing unit is PLC or DCS.

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