Intelligent regulation and monitoring system for ecological dispatching of hydropower station
By designing an intelligent control and monitoring system for ecological scheduling of hydropower stations combining PLC integrated automatic control system and remote real-time monitoring signal transmission device, the problem of complex ecological scheduling operation solutions of small hydropower stations and expensive existing solutions is solved, and high Sensitivity, fast and accurate ecological scheduling monitoring and regulation improves the scientificity and economic benefits of operation.
Patent Information
- Application Number
- CN202420408982.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-04
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-03-04
AI Technical Summary
The ecological scheduling and operation scheme of small hydropower stations is complex and relies on manual operations, and there is a risk of inaccurate or delayed execution. The existing commercial solutions are expensive, the equipment is highly integrated, making it difficult to flexibly adapt to different ecological sites, and user needs are difficult to achieve.
An intelligent control and monitoring system for ecological scheduling of hydropower stations was designed, using PLC integrated automatic control system and remote real-time monitoring signal transmission device, combined with radar level meter, electromagnetic flowmeter and double watt meter to achieve ecological flow and turbine units real-time monitoring and automatic regulation.
This system effectively improves the rationality, scientificity and operability of the ecological scheduling operation of small hydropower stations, ensures that the ecological flow discharge work is carried out as required, reduces the dehydration phenomenon between the factory and dams, maintains a good ecological environment, and improves the power generation economy. benefit.
Smart Images
Figure CN222514692U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an intelligent control and monitoring system in the field of smart water conservancy technology, and in particular to an intelligent control and monitoring system for ecological dispatching of a hydropower station. Background Art
[0002] Small hydropower stations are required to develop ecological dispatching and operation plans to provide a reliable monitoring basis and ensure the rational monitoring and regulation of ecological flows.
[0003] PLC automatic control is a real-time, intelligent monitoring technology with the advantages of high monitoring accuracy, high efficiency, and full coverage monitoring. It has been widely used in monitoring and regulation such as ecological scheduling.
[0004] There are differences in the traditional ecological dispatching and operation schemes of small hydropower stations, and their rationality, scientificity and operability are not the same. In the actual implementation process, these schemes involve many parameters and conditions, and the operation steps are complicated. Therefore, the current ecological dispatching and operation of small hydropower stations mainly rely on manual operation. Power station monitoring personnel need to invest a lot of manpower and material resources to implement these schemes, but due to the complexity of the schemes, the execution strength is general, and there is a risk of inaccurate or delayed execution, which may lead to certain economic losses or ecological impacts. The PLC integrated automatic control system is an intelligent control system that is arranged according to the actual site. Through wireless transmission technology, it can realize remote real-time data transmission, rapid execution according to expectations and other functions. While quickly detecting abnormalities, it can quickly issue instructions for ecological dispatching.
[0005] Currently, commercial solution systems on the market are expensive, the equipment's hardware and software are highly integrated, and it is difficult to flexibly set up on-site applications to adapt to different ecological sites. The user's customized needs are difficult to achieve, and the monitoring accuracy and efficiency are greatly reduced in different usage environments. Utility Model Content
[0006] In order to solve the deficiencies of the prior art and achieve the purpose of actively monitoring and regulating the ecological dispatch of small hydropower stations with high sensitivity, rapidity and accuracy, the utility model proposes an intelligent control and monitoring system for the ecological dispatch of hydropower stations.
[0007] The utility model adopts the following technical solutions:
[0008] The utility model includes a PLC integrated automatic control system and a remote real-time monitoring signal transmission device, which are connected to each other. The utility model is characterized in that the system also includes a radar level meter, which is installed in a reservoir and is connected to the PLC integrated automatic control system through the remote real-time monitoring signal transmission device; the PLC integrated automatic control system includes an air switch, a switching power supply, a power switch, a solenoid valve switch, an indicator light and a PLC integrated in a control box, the switching power supply is connected to the indicator light and the PLC through the power switch and the air switch, the PLC is electrically connected to the indicator light, the PLC integrated automatic control system also includes a solenoid valve, the remote real-time monitoring signal transmission device includes an intelligent terminal, the PLC is connected to the solenoid valve and a turbine unit in a hydropower station through the intelligent terminal, the remote real-time monitoring signal transmission device also includes a wireless bridge, the wireless bridge is connected to the intelligent terminal, and the intelligent terminal is connected to the PLC.
[0009] A fuse is also installed in the PLC integrated automatic control system.
[0010] The solenoid valve comprises a tailwater valve and a fire water valve, and both the tailwater valve and the fire water valve are connected to the PLC through an intelligent terminal.
[0011] The power switch is a two-position knob switch.
[0012] The solenoid valve switch is a three-position knob switch.
[0013] The system also includes an electromagnetic flowmeter placed at the ecological flow monitoring point and a dual wattmeter placed at the turbine unit, and both the electromagnetic flowmeter and the dual wattmeter are connected to the PLC through an intelligent terminal.
[0014] The indicator lights are a power indicator light, a first operation indicator light, a second operation indicator light, a first prohibition indicator light, and a second prohibition indicator light, which respectively correspond to the working status of the operating power supply, the tailwater valve, the fire water valve, the No. 1 turbine unit, and the No. 2 turbine unit.
[0015] The indicator light also includes a manual operation button corresponding to the indicator light.
[0016] The control box is made of 304 plate.
[0017] The control box is entirely spray-painted in RAL7035 off-white.
[0018] The beneficial effects of the utility model are:
[0019] The system proposed by the utility model can effectively improve the rationality, scientificity and operability of the ecological dispatching operation plan of the small hydropower station, and ensure that the water supply, irrigation and other functional water use undertaken by the supporting water storage project will not be affected during the production operation and ecological flow discharge of the small hydropower station; it can help to alleviate the dehydration between the plant and dam of the small hydropower station. The intelligent control technology of small hydropower ecological dispatching is helpful to the effective implementation of the ecological dispatching operation plan, thereby ensuring that the ecological flow discharge work is strictly carried out as required, minimizing the dehydration phenomenon between the plant and dam, and maintaining a good ecological environment in the river between the plant and dam; it can help the small hydropower station to discharge the ecological flow in strict accordance with the requirements of the ecological dispatching operation plan, while striving for as much economic benefit of power generation as possible for the small hydropower station. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the PLC integrated automatic control system of the utility model.
[0021] Figure 2 It is a schematic diagram of a remote real-time monitoring signal transmission device of the utility model.
[0022] Figure 3 It is a schematic diagram of the control cabinet structure of the utility model.
[0023] Figure 4 It is a diagram of indicator lights and control buttons of a control cabinet of the utility model.
[0024] Figure 5 It is a control flow diagram of the utility model.
[0025] In the figure: 1. PLC integrated automatic control system; 11. Air switch; 12. Switch power supply; 13. Fuse; 14. Two-position knob switch; 15. Three-position knob switch; 16. Indicator light; 17. PLC; 18. Solenoid valve; 19. Control cabinet; 191. Power indicator light; 192. First operation indicator light; 193. Second operation indicator light; 194. First prohibition indicator light; 195. Second prohibition indicator light; 196. Operating power supply; 197. Tailwater valve; 198. Fire water valve; 199. No. 1 turbine unit; 1910. No. 2 turbine unit; 2. Remote real-time monitoring signal transmission device; 21. Radar level meter; 22. Electromagnetic flowmeter; 23. Dual wattmeter; 24. Wireless bridge; 25. Intelligent terminal. DETAILED DESCRIPTION
[0026] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited to the scope of the embodiments.
[0027] like Figure 1 and Figure 2As shown, an ecological dispatching intelligent control and monitoring system for a hydropower station includes a PLC integrated automatic control system 1 and a remote real-time monitoring signal transmission device 2, the PLC integrated automatic control system 1 and the remote real-time monitoring signal transmission device 2 are connected, and the system also includes a radar level meter 21, the radar level meter 21 is installed in the reservoir (specifically, the bank of the reservoir or bridge piers and other places with good reflection effects), the radar level meter 21 is connected to the PLC integrated automatic control system 1 through the remote real-time monitoring signal transmission device 2, and realizes the function of monitoring the threshold value of the ecological waterproof minimum water level line; the system also includes an electromagnetic flowmeter 22 placed at the ecological flow monitoring point and a dual wattmeter 23 placed at the turbine unit, the electromagnetic flowmeter 22 and the dual wattmeter 23 are both connected to the PLC17 through the intelligent terminal 25, wherein the electromagnetic flowmeter 22 realizes the ecological flow threshold change control monitoring, and the dual wattmeter 23 realizes the turbine unit operation and control function. The PLC integrated automatic control system 1 includes an air switch 11, a switching power supply 12, a power switch, a solenoid valve switch, an indicator light 16 and a PLC 17 integrated in a control box 19. The switching power supply 12 is connected to the indicator light 16 and the PLC 17 via the power switch 196 and the air switch 11. The air switch 11 is responsible for opening and closing, the switching power supply 12 is responsible for power supply, the fuse 13 is responsible for protection, the two-position knob switch 14 and the three-position knob switch 15 are responsible for manual control, the indicator light 16 is responsible for displaying the status, the PLC 17 is responsible for controlling the program, and the solenoid valve 18 is responsible for protecting the circuit safety. The PLC 17 is electrically connected to the indicator light 16, the PLC integrated automatic control system 1 also includes a solenoid valve 18, the remote real-time monitoring signal transmission device 2 includes an intelligent terminal 25, the PLC 17 is connected to the solenoid valve 18 and the turbine unit in the hydropower station through the intelligent terminal 25, and the remote real-time monitoring signal transmission device 2 also includes a wireless bridge 24, the wireless bridge 24 is connected to the intelligent terminal 25, and the intelligent terminal 25 is connected to the PLC 17. A fuse 13 is also installed in the PLC integrated automatic control system 1. The PLC 17 and its components are integrated in the control cabinet 19, which can realize independent operation. The intelligent terminal 25 displays the operating status and control records of the ecosystem.
[0028] The solenoid valve 18 includes a tailwater valve 197 and a fire water valve 198, both of which are connected to the PLC 17 via the intelligent terminal 25. The power switch 196 is a two-position knob switch 14. The solenoid valve switch is a three-position knob switch 15.
[0029] like Figure 3 and Figure 4As shown, the number of indicator lights 16 is 5, namely, power indicator light 191, first operation indicator light 192, second operation indicator light 193, first prohibition indicator light 194, and second prohibition indicator light 195, which respectively correspond to the operating power supply 196 (function is to control the switch and stop of the control system), tailwater valve 197, fire water valve 198, No. 1 turbine unit 199 and No. 2 turbine unit 1910 (i.e., their switch and stop). Indicator light 16 also includes a manual operation button corresponding to the indicator light, that is, each indicator light has a corresponding manual operation button. When ecological water or fire water is temporarily added, it can be manually adjusted through the manual button of the control cabinet.
[0030] The control box 18 is 400×1600×300mm in size and is made of 304 sheet material to prevent corrosion. It is equipped with upper and lower doors. The upper door has a plexiglass perspective window. The upper door perspective glass can be used to observe the operating status of the PLC integrated automatic control system 1 at any time. It is equipped with a galvanized inner door and mounting plate. There is a horizontal galvanized mounting plate between the upper and lower doors. The lower door is equipped with the same inner door and mounting plate. The lower half is placed on the entire ecosystem operation 3 display. The control box 18 is sprayed with RAL7035 grayish white as a whole to prevent corrosion.
[0031] PLC17 is provided with an automatic control program, which can automatically control the operation of the spill valve and the turbine unit according to the remote signal feedback, and a manual adjustment knob is simultaneously provided, and the result is displayed on the intelligent terminal 25.
[0032] The remote real-time monitoring device monitors the liquid level through a radar level meter, monitors the ecological flow through an electromagnetic flow meter, and monitors the turbine unit through a dual wattmeter, and transmits the monitoring signal to the smart terminal 25 and the PLC integrated automatic control system through the 5G network.
[0033] The PLC integrated automatic control system can adjust parameters according to actual conditions, which greatly improves the flexibility of the system for installation in different hydropower stations and is suitable for hydropower stations of different sizes. The monitoring system is based on the combination of PLC technology and real-time transmission of remote signals to realize automatic monitoring and regulation of water level status, and can actively monitor and regulate the ecology of small hydropower stations with high sensitivity, rapidity and accuracy. When the water level in front of the dam is higher than the lowest water level for ecological waterproofing, the turbine unit can generate electricity normally, and the tail water of power generation is used as the ecological flow; when the water level in front of the dam is higher than the power generation limit water level and lower than the lowest water level for ecological water release, the ecological flow discharge valve is automatically closed, and the turbine unit needs to generate electricity as required; when the water level in front of the dam is lower than or drops to the power generation limit water level, the turbine unit stops generating electricity.
[0034] Furthermore, in an intelligent control and monitoring system for ecological dispatching of a hydropower station, the PLC is remotely connected to the turbine unit, the spill valve and the intelligent terminal through a wireless bridge. The intelligent terminal can display the system status. When the water level in front of the dam changes abnormally, the wireless bridge receives the level meter signal and sends it to the PLC integrated automatic control system for automatic control. At the same time, the PLC integrated automatic control system is equipped with a manual adjustment button, so that the operation of the ecosystem can be manually adjusted as needed.
[0035] like Figure 5 As shown, the control process includes: 1. Collecting water level data through a radar level gauge; 2. Transmitting the collected data to the PLC control center through a remote transmission device; 3. The PLC control center processes the data and issues execution instructions based on the set expected values; 4. The sensors of the unit and ecological flow receive the execution instructions in real time; 5. The sensors of the unit and ecological flow send operating status feedback to the PLC control center, so that the PCL control center can monitor the operation of the entire system in real time.
[0036] Specifically include:
[0037] (1) According to the ecological dispatching and operation requirements of small hydropower stations, after field investigation and confluence model establishment, the minimum water level for ecological water release and the water level limit for power generation are determined, and appropriate control system parameters are selected and input into the automatic control system.
[0038] (2) Remote real-time monitoring system monitoring. When the liquid level meter detects that the set liquid level is abnormal, a signal is transmitted to the alarm. On the one hand, the signal is transmitted to the smart terminal to inform the relevant staff. On the other hand, it is transmitted to the PLC integrated automatic control system for automatic regulation.
[0039] (3) Intelligent control. On the one hand, after the staff learns of the abnormality through the intelligent terminal, they can go to the control box to manually adjust the ecological flow and the turbine unit. On the other hand, after the PLC integrated intelligent control system receives the signal, the built-in control program will analyze it and perform ecological dispatch according to the principle. The specific control mechanism is: when the water level in front of the dam is higher than the lowest water level of ecological water release, the turbine unit can generate electricity normally, and the tailwater of power generation is used as the ecological flow; when the water level in front of the dam is higher than the power generation limit water level and lower than the lowest water level of ecological water release, the tailwater valve is automatically closed, and the turbine unit needs to generate electricity as required; when the water level in front of the dam is lower than the power generation limit water level, the turbine unit stops generating electricity. When the water level in front of the dam is higher than the lowest water level of ecological water release and the turbine unit is shut down, the fire valve is opened to discharge the ecological flow.
[0040] (4) Temporary application regulation. When temporary water is needed for domestic irrigation, fire fighting, etc., the ecological flow water can be increased by manually controlling the PLC integrated control system. This manual process can be achieved through the 5 switch stop buttons of the control cabinet. Then the PLC built-in program continues to regulate to ensure that the overall water level of the ecosystem is restored and operated stably.
[0041] (5) In all control processes, multiple parties are linked to perform feedback adjustment. When abnormal alarms occur in the liquid level, turbine unit, or spill valve, the PLC automatic control program will receive information remotely through the wireless bridge and issue instructions to open and close each part.
[0042] The utility model is not limited to the above-mentioned embodiments. Any changes in shape or structure are within the protection scope of the utility model. The protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the utility model, but these changes and modifications are within the protection scope of the utility model.
Claims
1. An ecological dispatching intelligent control and monitoring system for a hydropower station, comprising a PLC integrated automatic control system (1) and a remote real-time monitoring signal transmission device (2), wherein the PLC integrated automatic control system (1) and the remote real-time monitoring signal transmission device (2) are connected, and characterized in that: The system further comprises a radar level meter (21), which is installed in the reservoir. The radar level meter (21) is connected to the PLC integrated automatic control system (1) via a remote real-time monitoring signal transmission device (2). The PLC integrated automatic control system (1) comprises an air switch (11), a switching power supply (12), a power switch, a solenoid valve switch, an indicator light (16) and a PLC (17) integrated in a control cabinet (19). The switching power supply (12) is connected to the indicator light (16), the PLC via the power switch (196) and the air switch (11). The PLC (17) is electrically connected to the indicator light (16); the PLC integrated automatic control system (1) further comprises a solenoid valve (18); the remote real-time monitoring signal transmission device (2) comprises an intelligent terminal (25); the PLC (17) is connected to the solenoid valve (18) and a turbine unit in the hydropower station via the intelligent terminal (25); the remote real-time monitoring signal transmission device (2) further comprises a wireless bridge (24); the wireless bridge (24) is connected to the intelligent terminal (25); and the intelligent terminal (25) is connected to the PLC (17).
2. According to claim 1, the intelligent control and monitoring system for ecological dispatching of a hydropower station is characterized in that: A fuse (13) is also installed in the PLC integrated automatic control system (1).
3. The ecological dispatching intelligent control and monitoring system of a hydropower station according to claim 1 is characterized in that: The solenoid valve (18) comprises a tailwater valve (197) and a fire water valve (198), and both the tailwater valve (197) and the fire water valve (198) are connected to the PLC (17) via an intelligent terminal (25).
4. The ecological dispatching intelligent control and monitoring system of a hydropower station according to claim 1 is characterized in that: The power switch (196) is a two-position knob switch (14).
5. The ecological dispatching intelligent control and monitoring system of a hydropower station according to claim 1 is characterized in that: The solenoid valve switch is a three-position knob switch (15).
6. The ecological dispatching intelligent control and monitoring system of a hydropower station according to claim 1 is characterized in that: The system further comprises an electromagnetic flow meter (22) placed at an ecological flow monitoring point and a dual watt meter (23) placed at a water turbine unit, and both the electromagnetic flow meter (22) and the dual watt meter (23) are connected to the PLC (17) via an intelligent terminal (25).
7. The ecological dispatching intelligent control and monitoring system of a hydropower station according to claim 3 is characterized in that: The indicator lights (16) are a power indicator light (191), a first operation indicator light (192), a second operation indicator light (193), a first prohibition indicator light (194), and a second prohibition indicator light (195), which respectively correspond to the working states of the power switch (196), the tailwater valve (197), the fire water valve (198), the No. 1 turbine unit (199), and the No. 2 turbine unit (1910).
8. The ecological dispatching intelligent control and monitoring system of a hydropower station according to claim 1 or 7, characterized in that: The indicator light (16) also includes a manual operation button corresponding to the indicator light.
9. The ecological dispatching intelligent control and monitoring system of a hydropower station according to claim 1 is characterized in that: The control cabinet (19) is made of 304 sheet material.
10. The ecological dispatching intelligent control and monitoring system of a hydropower station according to claim 1 is characterized in that: The control cabinet (19) is entirely plastic-sprayed in RAL7035 off-white.