Control method and system for automatic opening and closing of hydropower station gate

Abstract

The invention provides a control method and system for automatic opening and closing of a hydropower station gate, and the method comprises the steps: obtaining a gate discharge curve table and a reservoir level and storage capacity relation table of a current hydropower station, and collecting the reservoir level of the hydropower station in real time; when the reservoir water level of the hydropower station is larger than the preset maximum safe water level, the gate is controlled to be fully opened, and an alarm signal is sent; when the reservoir water level of the hydropower station is smaller than the preset safe water level minimum value, the gate is controlled to be fully closed; when the reservoir water level of the hydropower station is smaller than or equal to the preset safety water level maximum value and larger than or equal to the preset safety water level minimum value, the opening degree reference value of the gate is determined according to the reservoir water level, the reservoir inlet flow and the reservoir outlet flow; and then the current opening degree of the gate is adjusted through a PLC control system based on the opening degree reference value, and opening degree control over the gate is achieved. According to the technical scheme, the water level of the reservoir can be monitored in real time, the gate opening degree can be automatically adjusted, and the reservoir dispatching efficiency and safety are improved.

Description

Technical Field

[0001] The present application relates to the technical field of automatic control of water conservancy projects, and in particular to a control method and system for automatic opening and closing of gates in hydropower stations. Background Art

[0002] At present, the gate control system of the hydropower station dam has been connected to the monitoring system. Although the gate opening and closing can be operated remotely with one button through the host computer, it is also based on the operation staff observing the dam water level in real time through industrial television. Especially in the flood season, when the rainfall increases and the discharge flow of the upstream power station increases, considering that some reservoirs have small storage capacity, frequent opening of the gate for flood discharge operations is not only inefficient and has certain operational risks, but also increases the burden on staff. In addition, traditional control is difficult to achieve precise scheduling when dealing with complex hydrological changes. There is an urgent need for an intelligent and highly automated gate control solution to achieve real-time and efficient automatic opening and closing of the gate. Summary of the invention

[0003] The present application provides a control method and system for automatic opening and closing of a hydropower station gate, so as to at least solve the technical problem of low efficiency and precision of existing gate control.

[0004] The first embodiment of the present application provides a control method for automatic opening and closing of a gate of a hydropower station, the method comprising:

[0005] Obtain the gate discharge curve table of the current hydropower station, the relationship table between the reservoir water level and storage capacity, and use a high-frequency radar water level meter to collect the reservoir water level of the hydropower station in real time;

[0006] When the water level of the reservoir of the hydropower station is greater than the preset maximum safe water level, the gate is controlled to be fully opened and an alarm signal is sent;

[0007] When the reservoir water level of the hydropower station is lower than the preset minimum safe water level, the gates are controlled to be fully closed;

[0008] When the reservoir water level of the hydropower station is less than or equal to the preset maximum safety water level and greater than or equal to the preset minimum safety water level, the gate opening reference value is determined according to the reservoir water level, inflow and outflow, and then the current opening of the gate is adjusted based on the opening reference value and using a PLC control system to achieve gate opening control.

[0009] Preferably, the determining of the gate opening reference value according to the reservoir water level, inflow and outflow comprises:

[0010] Find the maximum flood discharge flow rate corresponding to the reservoir water level in the gate discharge curve table;

[0011] Determine the change in reservoir capacity within a preset time period based on the reservoir water level and reservoir capacity relationship table;

[0012] Determining an initial flood discharge flow rate according to the inflow flow rate, the outflow flow rate and the change in the reservoir capacity;

[0013] Determine a target flood discharge flow rate according to the initial flood discharge flow rate and the maximum flood discharge flow rate corresponding to the reservoir water level;

[0014] The gate opening reference value is determined according to the maximum flood discharge flow rate and the target flood discharge flow rate.

[0015] Furthermore, the calculation formula of the initial flood discharge is as follows:

[0016]

[0017] In the formula, Q required is the initial flood discharge, Q inflow is the inflow flow, Q outflow is the outflow flow, Δv is the change in reservoir capacity within the preset time period, and Δt is the preset time period.

[0018] Furthermore, the target flood discharge flow is calculated as follows:

[0019] Q target =min(Q required ,Q max )

[0020] In the formula, Q target is the target flood discharge, Q max is the maximum flood discharge value.

[0021] Furthermore, the calculation formula of the gate opening reference value is as follows:

[0022]

[0023] Where G is the reference value of the gate opening, G max is the maximum gate opening.

[0024] Furthermore, the method further comprises:

[0025] The PID control algorithm is used to perform gate opening error feedback control on the gate opening.

[0026] Furthermore, the method further comprises:

[0027] The reservoir water level of the hydropower station collected in real time by the high-frequency radar water level meter is displayed.

[0028] The second embodiment of the present application proposes a control system for automatic opening and closing of a gate of a hydropower station, comprising:

[0029] The acquisition module is used to obtain the gate discharge curve table of the current hydropower station, the relationship table between the reservoir water level and storage capacity, and use a high-frequency radar water level meter to collect the reservoir water level of the hydropower station in real time;

[0030] A control module, used to control the gate to fully open and send an alarm signal when the reservoir water level of the hydropower station is greater than a preset maximum safe water level;

[0031] The control module is also used to control the gate to be fully closed when the reservoir water level of the hydropower station is lower than the preset minimum safe water level;

[0032] The control module is also used to determine the opening reference value of the gate according to the reservoir water level, inflow and outflow when the reservoir water level of the hydropower station is less than or equal to the preset maximum safety water level and greater than or equal to the preset minimum safety water level, and then adjust the current opening of the gate based on the opening reference value and using the PLC control system to achieve gate opening control.

[0033] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method described in the first aspect is implemented.

[0034] A fourth aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described in the first aspect of the present application.

[0035] The technical solution provided by the embodiments of the present application brings at least the following beneficial effects:

[0036] The present application proposes a control method and system for automatic opening and closing of a hydropower station gate, the method comprising: obtaining a gate discharge curve table and a reservoir water level and storage capacity relationship table of the current hydropower station, and using a high-frequency radar water level gauge to collect the reservoir water level of the hydropower station in real time; when the reservoir water level of the hydropower station is greater than the preset maximum safety water level, the gate is controlled to be fully opened and an alarm signal is sent; when the reservoir water level of the hydropower station is less than the preset minimum safety water level, the gate is controlled to be fully closed; when the reservoir water level of the hydropower station is less than or equal to the preset maximum safety water level, and greater than or equal to the preset minimum safety water level, the gate opening reference value is determined according to the reservoir water level, the inflow flow, and the outflow flow, and then the current gate opening is adjusted based on the opening reference value and using a PLC control system to realize gate opening control. The technical solution proposed in the present application can monitor the reservoir water level in real time and automatically adjust the gate opening, thereby improving the efficiency and safety of reservoir scheduling.

[0037] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0039] Figure 1 A flow chart of a control method for automatic opening and closing of a gate of a hydropower station provided according to an embodiment of the present application;

[0040] Figure 2 A first structural diagram of a control system for automatic opening and closing of a gate of a hydropower station provided according to an embodiment of the present application;

[0041] Figure 3 This is a second structural diagram of a control system for automatic opening and closing of a gate in a hydropower station provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0042] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0043] The present application proposes a control method and system for automatic opening and closing of a hydropower station gate, the method comprising: obtaining a gate discharge curve table and a reservoir water level and storage capacity relationship table of the current hydropower station, and using a high-frequency radar water level gauge to collect the reservoir water level of the hydropower station in real time; when the reservoir water level of the hydropower station is greater than the preset maximum safety water level, the gate is controlled to be fully opened and an alarm signal is sent; when the reservoir water level of the hydropower station is less than the preset minimum safety water level, the gate is controlled to be fully closed; when the reservoir water level of the hydropower station is less than or equal to the preset maximum safety water level, and greater than or equal to the preset minimum safety water level, the gate opening reference value is determined according to the reservoir water level, the inflow flow, and the outflow flow, and then the current gate opening is adjusted based on the opening reference value and using a PLC control system to realize gate opening control. The technical solution proposed in the present application can monitor the reservoir water level in real time and automatically adjust the gate opening, thereby improving the efficiency and safety of reservoir scheduling.

[0044] A control method and system for automatic opening and closing of a gate in a hydropower station according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0045] Embodiment 1

[0046] Figure 1 Flow chart of a control method for automatic opening and closing of a hydropower station gate provided according to one embodiment of the present application, such as Figure 1 As shown, the method includes:

[0047] Step 1: Obtain the gate discharge curve table of the current hydropower station, the relationship table between the reservoir water level and storage capacity, and use a high-frequency radar water level meter to collect the reservoir water level of the hydropower station in real time;

[0048] It should be noted that high-frequency radar water level gauges are installed at key locations of the dam to monitor water level changes in real time. Radar water level gauges use the principle of electromagnetic wave reflection and are not affected by interference factors such as water quality and temperature. They are suitable for various harsh environments. When installing a high-frequency radar water level gauge, ensure that it is perpendicular to the water surface and the installation position is stable to avoid water flow impact and interference from debris.

[0049] High frequency radar water level meter parameter settings:

[0050] Configure communication parameters: According to the instruction manual of the radar water level meter, set its communication parameters, such as baud rate, data bit, stop bit, check bit, etc., to ensure that it is consistent with the communication parameters of the PLC control system. The default baud rate is generally 9600bps.

[0051] Set device address: Set a unique device address for the radar water level meter so that the PLC can identify different devices. This can usually be set through the buttons on the water level meter or the supporting software.

[0052] High frequency radar water level meter hardware connection:

[0053] Connect the communication cable, use the RS485 communication cable to connect the RS485 interface of the radar water level meter to the RS485 communication module or expansion interface of the PLC, and upload the water level data in real time. Note that when connecting, make sure that the cable sequence corresponds correctly to avoid reverse connection.

[0054] Connect the power supply to provide the radar water level meter with a suitable power supply, generally DC24V. Connect according to the specific requirements of the water level meter to ensure that the power supply voltage is stable to ensure the normal operation of the water level meter.

[0055] It should be noted that the gate opening is controlled by the PLC control system, wherein the PLC control system is set as follows:

[0056] Configure the communication module: In the PLC programming software, configure the RS485 communication module connected to the radar water level meter, and set the same communication parameters as the radar water level meter in terms of baud rate, data bit, stop bit, and check bit.

[0057] Write a communication program: According to the communication protocol of the radar water level meter, write a corresponding communication program in the PLC to realize data exchange with the radar water level meter.

[0058] Data analysis: After the PLC receives the data sent by the radar water level meter, it needs to analyze the data according to the communication protocol to extract valid information such as the water level value. For the Modbus RTU protocol, the data is usually transmitted in the form of a byte array, which needs to be analyzed according to the format specified by the protocol to convert the byte array into the actual water level value.

[0059] It should be noted that the gate discharge curve table and the relationship table between reservoir water level and storage capacity are all obtained in advance. Table 1-5 shows the gate discharge curve table of a water station at different openings.

[0060] Table 1 Discharge curve (opening 16m)

[0061] Water level (m) 711 712 713 714 715 716 717 718 719 720 <![CDATA[Flow rate (m 3 / s)]]> 46.7 92.7 139 208 277 345 414 500 586 688 Water level (m) 721 722 723 724 725 726 727 728 729 730 <![CDATA[Flow rate (m 3 / s)]]> 790 902 1013 1133 1253 1378 1503 1633 1763 1899 Water level (m) 731 732 732.79 733 734 <![CDATA[Flow rate (m 3 / s)]]> 2035 2171 2278 2306 2440

[0062] Table 2 Discharge curve (opening 12.8m)

[0063] Water level (m) 711 712 713 714 715 716 717 718 719 720 <![CDATA[Flow rate (m 3 / s)]]> 45.7 90.35 135 193.5 252 322 392 472 551 643 Water level (m) 721 722 723 724 725 726 727 728 729 730 <![CDATA[Flow rate (m 3 / s)]]> 735 833 930 1036 1142 1255 1368 1488 1608 1731 Water level (m) 731 732 732.79 733 734 <![CDATA[Flow rate (m 3 / s)]]> 1853 1976 2072 2105 2261

[0064] Table 3 Discharge curve (opening 9.6m)

[0065] Water level (m) 711 712 713 714 715 716 717 718 719 720 <![CDATA[Flow rate (m 3 / s)]]> 42 81 119 169 218 277 336 403 470 544 Water level (m) 721 722 723 724 725 726 727 728 729 730 <![CDATA[Flow rate (m 3 / s)]]> 617 698 778 864 950 1042 1134 1231 1328 1432 Water level (m) 731 732 732.79 733 734 <![CDATA[Flow rate (m 3 / s)]]> 1536 1641 1722 1746 1856

[0066] Table 4 Discharge curve (opening 6.4m)

[0067]

[0068]

[0069] Table 5 Discharge curve (opening 3.2m)

[0070] Water level (m) 711 712 713 714 715 716 717 718 719 720 <![CDATA[Flow rate (m 3 / s)]]> 16.7 32 47.2 67 86.8 110 134 161 187 217 Water level (m) 721 722 723 724 725 726 727 728 729 730 <![CDATA[Flow rate (m 3 / s)]]> 246 278 309 344 378 415 451 490 528 569 Water level (m) 731 732 732.79 733 734 <![CDATA[Flow rate (m 3 / s)]]> 611 652 685 694 738

[0071] Table 6 shows the relationship between reservoir water level and storage capacity:

[0072] Table 6 Relationship between water level and storage capacity of hydropower station reservoir

[0073] Water level (m) 692.94 693.00 694.00 695.00 696.00 697.00 698.00 699.00 <![CDATA[Storage capacity (10 4 m 3 )]]> 0.00 0.06 1.00 1.94 2.88 3.82 4.76 5.70 Water level (m) 700.00 701.00 702.00 703.00 704.00 705.00 706.00 707.00 <![CDATA[Storage capacity (10 4 m 3 )]]> 6.64 11.60 16.55 21.51 26.46 31.42 45.35 59.28 Water level (m) 708.00 709.00 710.00 711.00 712.00 713.00 714.00 715.00 <![CDATA[Storage capacity (10 4 m 3 )]]> 73.21 87.14 101.07 136.75 172.42 208.10 243.77 279.45 Water level (m) 716.00 717.00 718.00 719.00 720.00 721.00 722.00 723.00 <![CDATA[Storage capacity (10 4 m 3 )]]> 348.23 417.01 485.78 554.56 623.34 727.42 831.50 935.57 Water level (m) 724.00 725.00 726.00 727.00 728.00 729.00 730.00 731.00 <![CDATA[Storage capacity (10 4 m 3 )]]> 1039.65 1143.73 1288.16 1432.59 1577.03 1721.46 1865.89 2061.76 Water level (m) 732.00 733.00 734.00 735.00 736.00 737.00 738.00 739.00 <![CDATA[Storage capacity (10 4 m 3 )]]> 2257.63 2453.50 2649.37 2845.24 3184.50 3523.76 3863.01 4202.27 Water level (m) 740.00 <![CDATA[Storage capacity (10 4 m 3 )]]> 4541.53

[0074] Step 2: When the reservoir water level of the hydropower station is greater than the preset maximum safe water level, the gate is controlled to be fully opened and an alarm signal is sent;

[0075] When the reservoir water level of the hydropower station is lower than the preset minimum safe water level, the gates are controlled to be fully closed;

[0076] When the reservoir water level of the hydropower station is less than or equal to the preset maximum safety water level and greater than or equal to the preset minimum safety water level, the gate opening reference value is determined according to the reservoir water level, inflow and outflow, and then the current opening of the gate is adjusted based on the opening reference value and using a PLC control system to achieve gate opening control.

[0077] It should be noted that the PLC is used to output control signals to the gate electrical switch cabinet, and the gate opening and closing actions are realized by controlling the relay. At the same time, the current state of the gate is monitored in real time through the feedback device and uploaded to the PLC.

[0078] In the embodiment of the present disclosure, the determining of the gate opening reference value according to the reservoir water level, the inflow flow, and the outflow flow includes:

[0079] Find the maximum flood discharge flow rate corresponding to the reservoir water level in the gate discharge curve table, that is, the flow rate value in the table;

[0080] Determine the change in reservoir capacity within a preset time period based on the reservoir water level and reservoir capacity relationship table;

[0081] Determining an initial flood discharge flow rate according to the inflow flow rate, the outflow flow rate and the change in the reservoir capacity;

[0082] Determine a target flood discharge flow rate according to the initial flood discharge flow rate and the maximum flood discharge flow rate corresponding to the reservoir water level;

[0083] The gate opening reference value is determined according to the maximum flood discharge flow rate and the target flood discharge flow rate.

[0084] The calculation formula of the initial flood discharge is as follows:

[0085]

[0086] In the formula, Q required is the initial flood discharge, Q inflow is the inflow flow, Q outflow is the outflow flow, Δv is the change in reservoir capacity within the preset time period, and Δt is the preset time period.

[0087] The target flood discharge flow is calculated as follows:

[0088] Q target =min(Q required ,Q max )

[0089] In the formula, Q target is the target flood discharge, Q max is the maximum flood discharge value.

[0090] The calculation formula of the gate opening reference value is as follows:

[0091]

[0092] Where G is the reference value of the gate opening, G max is the maximum gate opening.

[0093] Furthermore, the method further comprises:

[0094] The PID control algorithm is used to perform gate opening error feedback control on the gate opening.

[0095] It should be noted that error feedback control is to adjust the gate opening by monitoring the difference between the current water level and the target water level to achieve precise control. The PID control algorithm is used to optimize gate adjustment and reduce fluctuations caused by water level prediction errors. The specific calculation formula is as follows:

[0096] G 1 =G_0+k_p*ΔH+k_i*∫ΔHdt+k_d*d(ΔH) / dt

[0097] In the formula, G 1 is the current gate opening; G_0: the gate opening at the previous moment; k_p: proportional coefficient, used for linear amplification of deviation; k_i: integral coefficient, used to eliminate long-term deviation; k_d: differential coefficient, used to predict the deviation change trend and provide rapid response; ΔH: water level deviation, which is the difference between the current real-time monitoring water level (obtained by high-frequency radar water level gauge) and the target water level (water level threshold set according to scheduling requirements, such as flood season control water level or safety water level). The formula is: ΔH = H1-H2, H1 is the real-time monitoring water level; H2 is the target water level.

[0098] Furthermore, the method further comprises:

[0099] The reservoir water level of the hydropower station collected in real time by the high-frequency radar water level meter is displayed.

[0100] It should be noted that when the water level exceeds the preset safety range or the system is abnormal, the alarm function is activated. At the same time, this embodiment supports manual operation mode, and the on-duty personnel can observe the dam water level in real time through the industrial TV and use the host computer to directly control the opening and closing of the gate.

[0101] It should be noted that the high-frequency radar water level meter collects water level data at a frequency of once per second and uploads it to the PLC control system through the RS485 communication interface; the PLC parses and screens the received data, filters out noise and saves valid water level information; the data is synchronized to the host computer monitoring interface in real time, allowing the on-duty personnel to intuitively understand the water level changes.

[0102] The flood discharge and gate opening are adjusted dynamically according to the deviation between the real-time water level and the set threshold. During the adjustment process, the proportional integral differential (PID) control algorithm is used to compensate for the water level deviation to ensure the stability and accuracy of the regulation process. When the water level approaches the flood season control level, the system increases the frequency of data collection and strengthens the adjustment to avoid water level exceeding the limit.

[0103] In summary, the control method for automatic opening and closing of a hydropower station gate proposed in this embodiment can monitor the reservoir water level in real time and automatically adjust the gate opening, thereby improving the reservoir scheduling efficiency and safety.

[0104] Embodiment 2

[0105] Figure 2 FIG. 1 is a structural diagram of a control system for automatic opening and closing of a gate of a hydropower station according to an embodiment of the present application, such as Figure 2 As shown, the system comprises:

[0106] The acquisition module 100 is used to obtain the gate discharge curve table of the current hydropower station, the relationship table between the reservoir water level and the storage capacity, and use a high-frequency radar water level meter to collect the reservoir water level of the hydropower station in real time;

[0107] The control module 200 is used to control the gate to fully open and send an alarm signal when the reservoir water level of the hydropower station is greater than the preset maximum safe water level;

[0108] The control module 200 is also used to control the gate to be fully closed when the reservoir water level of the hydropower station is lower than the preset minimum safe water level;

[0109] The control module 200 is also used to determine the opening reference value of the gate according to the reservoir water level, inflow and outflow when the reservoir water level of the hydropower station is less than or equal to the preset maximum safety water level and greater than or equal to the preset minimum safety water level, and then adjust the current opening of the gate based on the opening reference value and using the PLC control system to achieve gate opening control.

[0110] In the embodiment of the present disclosure, the control module 200 is also used for:

[0111] Find the maximum flood discharge flow rate corresponding to the reservoir water level in the gate discharge curve table;

[0112] Determine the change in reservoir capacity within a preset time period based on the reservoir water level and reservoir capacity relationship table;

[0113] Determining an initial flood discharge flow rate according to the inflow flow rate, the outflow flow rate and the change in the reservoir capacity;

[0114] Determine a target flood discharge flow rate according to the initial flood discharge flow rate and the maximum flood discharge flow rate corresponding to the reservoir water level;

[0115] The gate opening reference value is determined according to the maximum flood discharge flow rate and the target flood discharge flow rate.

[0116] The calculation formula of the initial flood discharge is as follows:

[0117]

[0118] In the formula, Q required is the initial flood discharge, Q inflow is the inflow flow, Q outflow is the outflow flow, Δv is the change in reservoir capacity within the preset time period, and Δt is the preset time period.

[0119] The target flood discharge flow is calculated as follows:

[0120] Q target =min(Q required ,Q max )

[0121] In the formula, Q target is the target flood discharge, Q max is the maximum flood discharge value.

[0122] The calculation formula of the gate opening reference value is as follows:

[0123]

[0124] Where G is the reference value of the gate opening, G max is the maximum gate opening.

[0125] In the embodiments of the present disclosure, Figure 3 As shown, the system also includes:

[0126] The error adjustment module 300 is used to perform gate opening error feedback control on the gate opening by using a PID control algorithm.

[0127] In the embodiments of the present disclosure, Figure 3 As shown, the system also includes:

[0128] The display module 400 is used to display the reservoir water level of the hydropower station collected in real time by the high-frequency radar water level meter.

[0129] In summary, the control system for automatic opening and closing of a hydropower station gate proposed in this embodiment can monitor the reservoir water level in real time and automatically adjust the gate opening, thereby improving the reservoir scheduling efficiency and safety.

[0130] Embodiment 3

[0131] In order to implement the above embodiments, the present disclosure further proposes an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method described in Embodiment 1 is implemented.

[0132] Embodiment 4

[0133] In order to implement the above embodiments, the present disclosure further proposes a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method described in the first embodiment is implemented.

[0134] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0135] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0136] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A control method for automatic opening and closing of a hydropower station gate, characterized in that: The method comprises: Obtain the gate discharge curve table of the current hydropower station, the relationship table between the reservoir water level and storage capacity, and use a high-frequency radar water level meter to collect the reservoir water level of the hydropower station in real time; When the water level of the reservoir of the hydropower station is greater than the preset maximum safe water level, the gate is controlled to be fully opened and an alarm signal is sent; When the reservoir water level of the hydropower station is lower than the preset minimum safe water level, the gates are controlled to be fully closed; When the reservoir water level of the hydropower station is less than or equal to the preset maximum safety water level and greater than or equal to the preset minimum safety water level, the gate opening reference value is determined according to the reservoir water level, inflow and outflow, and then the current opening of the gate is adjusted based on the opening reference value and using a PLC control system to achieve gate opening control.

2. The method according to claim 1, characterized in that Determining the gate opening reference value according to the reservoir water level, the inflow flow, and the outflow flow includes: Find the maximum flood discharge flow rate corresponding to the reservoir water level in the gate discharge curve table; Determine the change in reservoir capacity within a preset time period based on the reservoir water level and reservoir capacity relationship table; Determining an initial flood discharge flow rate according to the inflow flow rate, the outflow flow rate and the change in the reservoir capacity; Determine a target flood discharge flow rate according to the initial flood discharge flow rate and the maximum flood discharge flow rate corresponding to the reservoir water level; The gate opening reference value is determined according to the maximum flood discharge flow rate and the target flood discharge flow rate.

3. The method according to claim 2, characterized in that The calculation formula of the initial flood discharge is as follows: In the formula, Q required is the initial flood discharge, Q inflow is the inflow flow, Q outflow is the outflow flow, Δv is the change in reservoir capacity within the preset time period, and Δt is the preset time period.

4. The method according to claim 3, characterized in that The target flood discharge flow rate is calculated as follows: Q target =min(Q required ,Q max ) In the formula, Q target is the target flood discharge, Q max is the maximum flood discharge value.

5. The method according to claim 4, characterized in that The calculation formula of the gate opening reference value is as follows: Where G is the reference value of the gate opening, G max is the maximum gate opening.

6. The method according to claim 5, characterized in that The method further comprises: The PID control algorithm is used to perform gate opening error feedback control on the gate opening.

7. The method according to claim 6, characterized in that The method further comprises: The reservoir water level of the hydropower station collected in real time by the high-frequency radar water level meter is displayed.

8. A control system for automatic opening and closing of gates in a hydropower station, characterized in that: The system comprises: The acquisition module is used to obtain the gate discharge curve table of the current hydropower station, the relationship table between the reservoir water level and storage capacity, and use a high-frequency radar water level meter to collect the reservoir water level of the hydropower station in real time; A control module, used to control the gate to fully open and send an alarm signal when the reservoir water level of the hydropower station is greater than a preset maximum safe water level; The control module is also used to control the gate to be fully closed when the reservoir water level of the hydropower station is lower than the preset minimum safe water level; The control module is also used to determine the opening reference value of the gate according to the reservoir water level, inflow and outflow when the reservoir water level of the hydropower station is less than or equal to the preset maximum safety water level and greater than or equal to the preset minimum safety water level, and then adjust the current opening of the gate based on the opening reference value and using the PLC control system to achieve gate opening control.

9. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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