A hydropower station temperature control method, system, terminal and medium

Abstract

The application discloses a kind of hydroelectric station temperature control method, system, terminal and medium, it is related to hydroelectric station temperature control technical field.The main technical scheme thereof: when axial flow fan is not operated, the first data and first temperature of heat generating node are collected;First data is processed to obtain temperature theoretical value;Determine whether temperature theoretical value is greater than temperature threshold value;If so, run axial flow fan;When the running time of axial flow fan satisfies length threshold value, the second temperature of heat generating node is collected;Determine whether second temperature is less than first temperature;If so, make axial flow fan maintain operating state;If not, make axial flow fan maintain operating state, and run the refrigeration fin of axial flow fan air inlet.To realize the temperature rise trend of heat generating node is judged in advance, and then achieve to start cooling before heat generating node temperature reaches dangerous value, to reduce the risk of equipment long-term in high temperature marginal state, reduce insulation aging, material fatigue and other hidden danger purpose.At the same time, it is expected to achieve the purpose of reducing energy waste.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydropower station temperature control, and particularly relates to a hydropower station temperature control method, system, terminal and medium. BACKGROUND

[0002] In the process of generating electricity by a hydropower generator set, the temperature in some areas gradually increases due to rotating parts and internal current. If the temperature exceeds a certain safety threshold, it may cause equipment failure or even shutdown accidents. With the continuous development of science and technology, the temperature monitoring system of the hydropower generator set is gradually upgraded and improved.

[0003] In the current power station monitoring system, temperature sensors are usually installed at corresponding parts of the generator set to monitor the temperature of the equipment. An alarm upper limit and a shutdown upper limit are generally set in the temperature table. When the temperature exceeds the alarm upper limit, the monitoring system generates an alarm signal; when the temperature exceeds the shutdown upper limit, the monitoring system issues a shutdown instruction to protect the generator set. However, the action of the existing power station monitoring system usually occurs when the temperature exceeds the safety threshold, greatly increasing the risk of potential failure or performance degradation. SUMMARY

[0004] The purpose of the present application is to provide a hydropower station temperature control method, system, terminal and medium, which solves the problem that the action of the existing power station monitoring system usually occurs when the temperature exceeds the safety threshold, greatly increasing the risk of potential failure or performance degradation.

[0005] To solve the above technical problems, the present application adopts the following technical solutions:

[0006] In a first aspect, a hydropower station temperature control method is provided, comprising the following operations:

[0007] S1, when the axial flow fan is not running, collecting the working condition data and temperature of the heat generating node, and recording the collected working condition data and temperature as first data and first temperature respectively;

[0008] S2, processing the first data to obtain a temperature theoretical value of the heat generating node;

[0009] S3, determining whether the temperature theoretical value is greater than a temperature threshold; if yes, jumping to S4; if no, jumping to S1;

[0010] S4, running the axial flow fan to cool the heat generating node;

[0011] S5, when the running time of the axial flow fan meets a time threshold, collecting the temperature of the heat generating node, and recording the collected node temperature as second temperature;

[0012] S6, judging whether the second temperature is less than the first temperature; if yes, maintaining the operation state of the axial flow fan; if no, maintaining the operation state of the axial flow fan and operating the refrigeration fin of the air inlet of the axial flow fan.

[0013] Further, the process of obtaining the temperature theoretical value of the heat-generating node comprises:

[0014] According to the first data, a corresponding temperature curve is extracted from a temperature curve data set, and the extracted temperature curve is recorded as a first curve; wherein the temperature curve data set contains temperature curves of the temperature of the heat-generating node changing with time under different working condition data;

[0015] The maximum temperature on the first curve is obtained, and the obtained maximum temperature is recorded as a temperature theoretical value.

[0016] Further, before S4, further comprising:

[0017] S00, obtaining a temperature timestamp corresponding to the first temperature;

[0018] S01, judging whether the first temperature is less than or equal to a temperature threshold; if yes, jumping to S02; if no, jumping to S4;

[0019] S02, calculating a temperature rise duration required for the heat-generating node to rise from the first temperature to the temperature threshold along the first curve;

[0020] S03, obtaining a start-up duration of the axial flow fan and a running duration of the axial flow fan from air outlet operation to the heat-generating node; wherein the start-up duration is the required time from the temperature timestamp to the start-up of the axial flow fan;

[0021] S04, calculating a start-up timestamp of the axial flow fan according to the temperature timestamp, the temperature rise duration, the start-up duration and the running duration;

[0022] S05, operating the axial flow fan at the start-up timestamp.

[0023] Further, in step S6, when the second temperature is greater than or equal to the first temperature, further comprising:

[0024] When the running duration of the axial flow fan meets a duration threshold, working condition data of the heat-generating node is collected, and the collected working condition data is recorded as second data;

[0025] According to the second data, a corresponding temperature curve is extracted from a temperature curve data set, and the extracted temperature curve is recorded as a second curve;

[0026] The maximum temperature on the second curve is obtained, and the obtained maximum temperature is recorded as a target temperature value.

[0027] determining whether the target temperature value is greater than the temperature threshold; if yes, maintaining the operation state of the axial flow fan and operating the refrigerating fin of the air inlet of the axial flow fan; if no, maintaining the operation state of the axial flow fan.

[0028] Further, the working condition data comprises an ambient temperature and a unit operation parameter.

[0029] In a second aspect, a temperature control system for a hydropower station is provided, which is applicable to the temperature control method of the first aspect, and comprises:

[0030] an axial flow fan, which is arranged in the hydropower station and corresponds to a heat generating node in the hydropower station;

[0031] a refrigerating fin, which is arranged at the air inlet of the axial flow fan;

[0032] a first collecting module, which is configured to execute S1 to collect working condition data and a temperature of the heat generating node when the axial flow fan is not operating, and record the collected working condition data and temperature as first data and a first temperature respectively;

[0033] a first processing module, which is configured to execute S2 to process the first data to obtain a temperature theoretical value of the heat generating node;

[0034] a first determining module, which is configured to execute S3 to determine whether the temperature theoretical value is greater than a temperature threshold; if yes, jump to S4; if no, jump to S1;

[0035] a first executing module, which is configured to execute S4 to operate the axial flow fan to cool the heat generating node;

[0036] a second collecting module, which is configured to execute S5 to collect a temperature of the heat generating node when the operation time of the axial flow fan satisfies a time threshold, and record the collected node temperature as a second temperature;

[0037] a second determining module, which is configured to execute S6 to determine whether the second temperature is less than the first temperature;

[0038] a second executing module, which is configured to maintain the operation state of the axial flow fan when the second temperature is less than the first temperature;

[0039] a third executing module, which is configured to maintain the operation state of the axial flow fan and operate the refrigerating fin of the air inlet of the axial flow fan when the second temperature is greater than or equal to the first temperature.

[0040] In a third aspect, a terminal is provided, comprising a processor and a memory for storing processor-executable instructions; wherein the processor is configured to invoke the instructions stored in the memory to perform the temperature control method according to the first aspect.

[0041] In a fourth aspect, a computer-readable storage medium is provided, having stored thereon computer program instructions, wherein the computer program instructions, when executed by a processor, implement the temperature control method according to the first aspect.

[0042] Compared with the prior art, the present application has the following beneficial effects:

[0043] On the one hand, the first data is processed to obtain a temperature theoretical value of the heat generating node, and when the temperature theoretical value is greater than a temperature threshold value, the axial flow fan is operated to cool the heat generating node. This can realize early judgment of the temperature rising trend of the heat generating node, and further achieve the purpose of starting cooling before the temperature of the heat generating node reaches a dangerous value, so as to reduce the risk of long-term high-temperature edge state of the equipment, and reduce hidden dangers such as insulation aging and material fatigue. On the other hand, the refrigerating fin of the air inlet of the axial flow fan is only operated when the second temperature is greater than or equal to the first temperature. This can achieve the purpose of reducing energy waste. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 FIG. 1 is a flowchart of a water power station temperature control method according to an embodiment of the present application. DETAILED DESCRIPTION

[0045] The present application will be further described below in conjunction with the accompanying drawings.

[0046] Embodiment 1: The present embodiment provides a water power station temperature control method, as shown in FIG. 1, comprising the following operations: Figure 1

[0047] S10, when the axial flow fan is not running, collecting the working condition data and temperature of the heat generating node, and marking the collected working condition data and temperature as first data and first temperature respectively;

[0048] In the present embodiment, the working condition data includes environmental temperature and unit operation parameters.

[0049] For example, in the implementation process, when the axial flow fan is not running, i.e. the heat generating node is in a natural cooling state, the working condition data and temperature of the heat generating node are collected, and the collected working condition data of the heat generating node is marked as first data, and the collected temperature of the heat generating node is marked as first temperature. The heat generating node includes stator winding, bearing, cooler, etc. The working condition data includes environmental temperature and unit operation parameters, and the unit operation parameters include load current, voltage, speed, etc. ​

[0050] S20, processing the first data to obtain a temperature theoretical value of the heat-generating node;

[0051] In this embodiment, the process of obtaining the temperature theoretical value of the heat-generating node comprises:

[0052] According to the first data, a corresponding temperature curve is extracted from a temperature curve data set, and the extracted temperature curve is recorded as a first curve; wherein the temperature curve data set contains temperature curves of the temperature of the heat-generating node changing with time under different working condition data.

[0053] For example, in the implementation process, the temperature curve of the temperature of the heat-generating node changing with time under each working condition data is constructed by historical operation records, experimental tests or simulation modeling, and a temperature curve data set containing each temperature curve is established.

[0054] From the temperature curve data set, the temperature curve corresponding to the first data is matched, and the matched temperature curve is recorded as the first curve. For example, similarity matching is performed in the temperature curve data set to find one or more temperature curves closest to the working condition data represented by the first data. In one embodiment, the Euclidean distance between the first data vector and the working condition data vector in the temperature curve data set can be calculated, and the temperature curve with the smallest Euclidean distance is marked as the first curve. On the other hand, a fitting curve can be obtained by weighted interpolation of the similar working condition curve of the first data, and the fitting curve is marked as the first curve.

[0055] The maximum temperature on the first curve is obtained, and the obtained maximum temperature is recorded as the temperature theoretical value.

[0056] For example, in the implementation process, the maximum temperature on the first curve is extracted, and the extracted maximum temperature is marked as the temperature theoretical value. Wherein, the maximum temperature represents the highest temperature that the heat-generating node may reach under the first data without taking additional cooling measures.

[0057] S30, judging whether the temperature theoretical value is greater than a temperature threshold value; if yes, jumping to S40; if no, jumping to S10;

[0058] In this embodiment, before S4, it further comprises:

[0059] S000, obtaining a temperature timestamp corresponding to the first temperature;

[0060] Exemplarily, in the implementation process, it is judged whether the temperature theoretical value is greater than the temperature threshold value. The temperature threshold value can be the maximum temperature that can be reached when the heat-generating node is allowed to normally operate, which is set according to historical data, historical experience, and industry standards. When the theoretical temperature value is less than or equal to the temperature threshold value, the foregoing step S10 is performed. When the theoretical temperature is greater than the temperature threshold value, the time stamp when the first temperature is collected is obtained, and the time stamp of the first temperature is marked as the temperature time stamp.

[0061] S001, it is judged whether the first temperature is less than or equal to the temperature threshold value; if yes, it is jumped to S002; if no, it is jumped to S40;

[0062] S002, the temperature rise duration required for the heat-generating node to rise from the first temperature to the temperature threshold value along the first curve is calculated;

[0063] Exemplarily, in the implementation process, the time required for rising from the first temperature to the temperature threshold value along the first curve is found, and the found time is marked as the temperature rise duration.

[0064] S003, the starting duration of the axial flow fan and the running duration of the air outlet of the axial flow fan to the heat-generating node are obtained; wherein the starting duration is the time required from the temperature time stamp to the starting of the axial flow fan;

[0065] Exemplarily, in the implementation process, the starting duration and the running duration of the axial flow fan are obtained. The starting duration refers to the time required from the temperature time stamp to the starting of the axial flow fan and the starting of the air outlet. The starting duration can be obtained from historical data, and the starting duration includes control signal transmission time, PLC response time, motor starting acceleration time, etc. The running duration refers to the time required for the cold air to reach the surface of the heat-generating node from the outlet of the fan after the fan starts to blow air.

[0066] S004, the starting time stamp of the axial flow fan is calculated according to the temperature time stamp, the temperature rise duration, the starting duration, and the running duration;

[0067] Exemplarily, in the implementation process, the starting time stamp of the axial flow fan is calculated according to the temperature time stamp, the temperature rise duration, the starting duration, and the running duration. The starting time stamp is the latest starting time of the axial flow fan.

[0068] S005, the axial flow fan is started at the starting time stamp.

[0069] Exemplarily, in the implementation process, when the system collects that the current time is consistent with the starting time stamp, the axial flow fan is immediately started. According to thermal inertia and system delay, the starting time is accurately arranged to achieve the purpose of improving the starting timeliness, thereby reducing the risk of wasting energy caused by starting too early or the risk of poor cooling effect caused by starting too late.

[0070] S40, running the axial flow fan to cool the heat-generating node;

[0071] Exemplarily, in the implementation process, the axial flow fan can cool the heat-generating node when the axial flow fan is running.

[0072] S50, when the running time of the axial flow fan meets the time threshold, collecting the temperature of the heat-generating node, and marking the collected node temperature as the second temperature;

[0073] Exemplarily, in the implementation process, the running time of the axial flow fan is collected in real time, and when the running time meets the time threshold, the temperature of the heat-generating node is collected, and the collected temperature is marked as the second temperature. The time threshold is set according to the heat-generating characteristics of the heat-generating node, combined with historical data and historical experience.

[0074] S60, judging whether the second temperature is less than the first temperature; if yes, maintaining the running state of the axial flow fan; if no, maintaining the running state of the axial flow fan, and running the refrigeration fin of the air inlet of the axial flow fan.

[0075] In this embodiment, in step S6, when the second temperature is greater than or equal to the first temperature, it further includes:

[0076] When the running time of the axial flow fan meets the time threshold, the working condition data of the heat-generating node is collected, and the collected working condition data is marked as the second data;

[0077] Exemplarily, in the implementation process, it is judged whether the second temperature is less than the first temperature. When the second temperature is less than the first temperature, it indicates that the cooling effect of the axial flow fan on the heat-generating node is relatively obvious, and additional cooling equipment is not needed. At this time, the axial flow fan is maintained in the running state.

[0078] When the second temperature is greater than or equal to the first temperature, it indicates that the cooling effect of the axial flow fan on the heat-generating node is low. At this time, the working condition data of the heat-generating node is collected, and the collected working condition data is marked as the second data.

[0079] According to the second data, the corresponding temperature curve is extracted from the temperature curve data set, and the extracted temperature curve is marked as the second curve;

[0080] Exemplarily, in the implementation process, a temperature curve corresponding to the second data is matched from the temperature curve data set, and the matched temperature curve is recorded as the second curve. For example, similarity matching is performed in the temperature curve data set to find one or more temperature curves closest to the working condition data represented by the second data. In one embodiment, the Euclidean distance of the second data vector to each working condition data vector in the temperature curve data set can be calculated, and the temperature curve with the smallest Euclidean distance is marked as the second curve. On the other hand, a fitting curve can be obtained by weighted interpolation of the working condition curve close to the second data, and the fitting curve is marked as the second curve.

[0081] The maximum temperature on the second curve is obtained, and the obtained maximum temperature is recorded as a target temperature value.

[0082] Exemplarily, in the implementation process, the maximum temperature on the second curve is extracted, and the extracted maximum temperature is marked as the target temperature value. Wherein, the maximum temperature represents the highest temperature that the heat generating node can reach under the second data without taking additional cooling measures.

[0083] It is judged whether the target temperature value is greater than a temperature threshold value; if yes, the axial flow fan is maintained in a running state, and the refrigerating fin of the air inlet of the axial flow fan is operated; if not, the axial flow fan is maintained in a running state.

[0084] Exemplarily, in the implementation process, it is judged whether the target temperature value is greater than a temperature threshold value. When the target temperature value is greater than the temperature threshold value, it indicates that the heat generating node will have a risk of excessively high temperature under the second data without taking additional cooling measures. At this time, the axial flow fan is maintained in a running state, and the refrigerating fin of the air inlet of the axial flow fan is operated. When the target temperature value is less than or equal to the temperature threshold value, it indicates that the heat generating node will not have a risk of excessively high temperature under the second data even without taking additional cooling measures. At this time, the axial flow fan is maintained in a running state. By capturing the latest working condition (second data) in real time, the temperature rise risk is re-evaluated, so as to achieve the purpose of reducing the risk of misjudgment caused by the difference between the working conditions before and after starting the fan.

[0085] The water power station temperature control method in the embodiment: on the one hand, the first data is processed to obtain a temperature theoretical value of the heat generating node, and when the temperature theoretical value is greater than a temperature threshold value, the axial flow fan is operated to cool the heat generating node. To realize the purpose of judging the temperature rise trend of the heat generating node in advance, and then starting cooling before the temperature of the heat generating node reaches a dangerous value, so as to reduce the risk of the equipment being in a high temperature edge state for a long time, and reduce the hidden dangers such as insulation aging and material fatigue. On the other hand, only when the second temperature is greater than or equal to the first temperature, the refrigerating fin of the air inlet of the axial flow fan is operated. To achieve the purpose of reducing energy waste.

[0086] Embodiment 2: The present embodiment provides a hydropower station temperature control system, which is suitable for the temperature control method as described in Embodiment 1, and comprises an axial flow fan, a refrigeration fin, a first acquisition module, a first processing module, a first judgment module, a first execution module, a second acquisition module, a second judgment module, a second execution module, and a third execution module.

[0087] The axial flow fan is arranged in the hydropower station and corresponds to a heat generating node in the hydropower station; the refrigeration fin is arranged at an air inlet of the axial flow fan; the first acquisition module is configured to perform S10 to acquire working condition data and a temperature of the heat generating node when the axial flow fan is not running, and record the acquired working condition data and temperature as first data and a first temperature respectively; the first processing module is configured to perform S20 to process the first data to obtain a temperature theoretical value of the heat generating node; the first judgment module is configured to perform S30 to determine whether the temperature theoretical value is greater than a temperature threshold value; if yes, jump to S40; if no, jump to S10; the first execution module is configured to perform S40 to run the axial flow fan to cool the heat generating node; the second acquisition module is configured to perform S50 to acquire a temperature of the heat generating node when a running time of the axial flow fan satisfies a time threshold value, and record the acquired node temperature as a second temperature; the second judgment module is configured to perform S60 to determine whether the second temperature is less than the first temperature; the second execution module is configured to maintain a running state of the axial flow fan when the second temperature is less than the first temperature; and the third execution module is configured to maintain the running state of the axial flow fan and run the refrigeration fin at the air inlet of the axial flow fan when the second temperature is greater than or equal to the first temperature.

[0088] The hydropower station temperature control system in the present embodiment: on the one hand, the first data is processed to obtain a temperature theoretical value of the heat generating node, and when the temperature theoretical value is greater than a temperature threshold value, the axial flow fan is run to cool the heat generating node. This can realize early determination of the temperature rising trend of the heat generating node, and thus achieve the purpose of starting cooling before the temperature of the heat generating node reaches a dangerous value, so as to reduce the risk of the equipment being in a high-temperature marginal state for a long time, and reduce hidden dangers such as insulation aging and material fatigue. On the other hand, only when the second temperature is greater than or equal to the first temperature, the refrigeration fin at the air inlet of the axial flow fan is run. This can achieve the purpose of reducing energy waste.

[0089] In the present embodiment, a terminal is also provided, which comprises a processor and a memory, the memory being configured to store processor-executable instructions; wherein the processor is configured to invoke the instructions stored in the memory to perform the temperature control method as described in Embodiment 1.

[0090] In the embodiment, a computer readable storage medium is also provided, and computer program instructions are stored on the computer readable storage medium, wherein the computer program instructions are executed by a processor to implement the temperature control method according to the embodiment 1.

[0091] While the application has been described with reference to the exemplary embodiments thereof, it is to be understood that the application is not limited to the embodiments disclosed, but is intended to cover numerous other modifications thereof that will be apparent to those skilled in the art in view of the disclosure herein. More particularly, various modifications to the components and / or layouts of the subject combination layout will be apparent to those of ordinary skill in the art, within the scope of the disclosure, drawings and claims. Other uses will also become apparent from consideration of the specification as a whole.

Claims

1. A method for temperature control in a hydropower station, characterized in that, Includes the following operations: S1. When the axial flow fan is not running, collect the operating condition data and temperature of the heat-generating node, and record the collected operating condition data and temperature as the first data and the first temperature, respectively. S2, process the first data to obtain the theoretical temperature value of the heating node; S3, determine whether the theoretical temperature value is greater than the temperature threshold; if yes, proceed to S4; if no, proceed to S1. S4, run the axial flow fan to cool down the heat-generating node; S5, when the running time of the axial flow fan meets the time threshold, the temperature of the heat-generating node is collected, and the collected node temperature is recorded as the second temperature; S6, determine whether the second temperature is lower than the first temperature; if yes, keep the axial fan running; if no, keep the axial fan running and operate the cooling element at the air inlet of the axial fan. In step S6, when the second temperature is greater than or equal to the first temperature, the process further includes: When the running time of the axial flow fan meets the time threshold, the operating condition data of the heat-generating node is collected, and the collected operating condition data is recorded as the second data. Based on the second data, the corresponding temperature curve is extracted from the temperature curve dataset; and the extracted temperature curve is recorded as the second curve; wherein, the temperature curve dataset contains temperature curves showing the temperature change of the heating node over time under different operating conditions; Obtain the maximum temperature value on the second curve and record the obtained maximum temperature value as the target temperature value; Determine whether the target temperature value is greater than the temperature threshold; if so, keep the axial flow fan running and operate the cooling element at the air inlet of the axial flow fan; if not, keep the axial flow fan running.

2. The temperature control method according to claim 1, characterized in that, The process of obtaining the theoretical temperature value of the heating node includes: Based on the first data, extract the corresponding temperature curve from the temperature curve dataset; and record the extracted temperature curve as the first curve; Obtain the maximum temperature value on the first curve and record the obtained maximum temperature value as the theoretical temperature value.

3. The temperature control method according to claim 2, characterized in that, Before S4, it also includes: S00, obtain the temperature timestamp corresponding to the first temperature; S01, determine whether the first temperature is less than or equal to the temperature threshold; if yes, proceed to S02; if no, proceed to S4. S02, calculate the time required for the temperature rise of the heating node to rise from the first temperature to the temperature threshold along the first curve; S03, obtain the start-up time of the axial flow fan and the running time of the axial flow fan from the outlet to the heating node; wherein, the start-up time is the time required from the temperature timestamp to the start-up of the axial flow fan; S04. Calculate the start-up timestamp of the axial flow fan based on the temperature timestamp, temperature rise duration, start-up duration, and running duration. S05, start the axial flow fan at the start timestamp.

4. The temperature control method according to claim 1, characterized in that, The operating data includes ambient temperature and unit operating parameters.

5. A temperature control system for a hydropower station, characterized in that, The temperature control system is applicable to the temperature control method as described in any one of claims 1-4, and the temperature control system comprises: An axial flow fan is installed inside a hydropower station, and the axial flow fan corresponds to a heat-generating node within the hydropower station. A cooling element is disposed at the air inlet of the axial flow fan; The first acquisition module is used to execute S1 to acquire the operating condition data and temperature of the heat-generating node when the axial flow fan is not running, and to record the acquired operating condition data and temperature as the first data and the first temperature, respectively. The first processing module is used to execute S2 to process the first data and obtain the theoretical temperature value of the heating node. The first judgment module is used to execute S3 to determine whether the theoretical temperature value is greater than the temperature threshold; if yes, it jumps to S4; if no, it jumps to S1. The first execution module is used to execute S4 to run the axial flow fan to cool down the heat-generating node; The second acquisition module is used to execute S5, so as to acquire the temperature of the heating node when the running time of the axial flow fan meets the time threshold, and record the acquired node temperature as the second temperature; The second judgment module is used to execute S6 to determine whether the second temperature is lower than the first temperature; The second execution module is used to keep the axial flow fan running when the second temperature is lower than the first temperature. The third execution module is used to maintain the axial flow fan in operation and operate the cooling plate at the air inlet of the axial flow fan when the second temperature is greater than or equal to the first temperature.

6. A terminal, characterized in that, include: A processor and a memory, wherein the memory is used to store processor-executable instructions; The processor is configured to invoke instructions stored in the memory to execute the temperature control method as described in any one of claims 1-4.

7. A computer-readable storage medium having computer program instructions stored thereon, characterized in that, When the computer program instructions are executed by the processor, they implement the temperature control method as described in any one of claims 1-4.

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