An automatic water supply control system for a hydropower plant

Abstract

This utility model discloses an automatic water supply control system for a hydropower plant, including a sedimentation tank, a filtration tank, a polyaluminum chloride (PAC) stirring tank, a clear water tank, a sodium hypochlorite generator, a dam crest water tank, a first water source pump, a first metering pump, a second metering pump, a booster pump, a water level sensor, and a control terminal. The inlet of the sedimentation tank is connected to the water intake via a pipe, and the first water source pump is installed on this pipe. The inlet of the filtration tank is connected to the outlet of the sedimentation tank via a pipe, and the outlet of the filtration tank is connected to the inlet of the clear water tank via a pipe. The PAC stirring tank contains PAC solution, and its outlet is connected to the inlet of the sedimentation tank via a pipe, where the first metering pump is installed. The sodium hypochlorite generator produces sodium hypochlorite solution, and its outlet is connected to the inlet of the clear water tank via a pipe. This utility model has automatic dosing and automatic pumping functions, reducing labor costs and improving work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of industrial automation control technology, specifically to an automatic water supply control system for a hydropower plant. Background Technology

[0002] Hydropower plant water supply systems must maintain a 24-hour uninterrupted supply of water for production, fire fighting, and domestic use. If the water supply is interrupted, it will cause accidents such as water shortage and shutdown of equipment systems such as cooling water and lubricating water for the units, threatening the safety of fire fighting water. However, the existing water supply systems are basically controlled manually, that is, manually starting water pumping, manually adding chemicals (polyaluminum chloride solution (which is used for coagulation and sedimentation to purify water quality) and sodium hypochlorite solution (which is used to sterilize and disinfect water)), and manually checking the water supply. This work is inefficient and involves long exposure to chemicals, which affects occupational health. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an automatic water supply control system for hydropower plants, which has the functions of automatic chemical dosing and automatic water pumping, thereby reducing labor costs and improving work efficiency.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An automatic water supply control system for a hydropower plant includes a sedimentation tank, a filtration tank, a polyaluminum chloride (PAC) mixing tank, a clear water tank, a sodium hypochlorite generator, a dam crest water tank, a first water source pump, a first metering pump, a second metering pump, a booster pump, a water level sensor, and a control terminal. The inlet of the sedimentation tank is connected to the water intake via a pipeline, and the first water source pump is installed on this pipeline. The inlet of the filtration tank is connected to the outlet of the sedimentation tank via a pipeline, and the outlet of the filtration tank is connected to the inlet of the clear water tank via a pipeline. The PAC mixing tank contains a PAC solution, and its outlet is connected to the inlet of the sedimentation tank via a pipeline. The pipeline is equipped with a first metering pump; a sodium hypochlorite generator is used to produce sodium hypochlorite solution, and its outlet is connected to the inlet of the clear water tank via a pipeline, which is equipped with a second metering pump; the outlet of the clear water tank is connected to the inlet of the dam crest water tank via a pipeline, which is equipped with a booster pump; the outlet of the dam crest water tank is used to supply water for domestic, industrial, and fire-fighting purposes; water level sensors are installed in the polyaluminum chloride mixing tank, the clear water tank, and the dam crest water tank; the control terminal is located in the plant building and is electrically connected to the sodium hypochlorite generator, the first water source pump, the first metering pump, the second metering pump, the booster pump, and the water level sensors.

[0006] Furthermore, the control terminal includes a PLC controller and multiple remote control buttons. The sodium hypochlorite generator, the first water source pump, the first metering pump, the second metering pump, the booster pump, the water level sensor, and the multiple remote control buttons are electrically connected to the PLC controller. The sodium hypochlorite generator, the first water source pump, the first metering pump, the second metering pump, and the booster pump are each controlled by a remote control button.

[0007] Furthermore, relays are installed between the sodium hypochlorite generator, the first water source pump, the first metering pump, the second metering pump, and the booster pump and the PLC controller.

[0008] Furthermore, the inlet and outlet of the polyaluminum chloride mixing tank are connected by a pipe. A second water source pump and a first solenoid valve, which are electrically connected to the PLC controller, are installed on the pipe. The second water source pump and the first solenoid valve are controlled by a remote control button, and relays are installed between the second water source pump and the first solenoid valve and the PLC controller.

[0009] Furthermore, current sensors are installed between the first water source pump, the second water source pump, and the booster pump and the relay, and the signal output terminal of the current sensor is electrically connected to the PLC controller.

[0010] Furthermore, the polyaluminum chloride mixing tank is equipped with a mixer electrically connected to the PLC controller. The mixer is controlled by a remote control button, and a relay is installed between the mixer and the PLC controller.

[0011] Furthermore, the inlet of the sodium hypochlorite generator is connected to the outlet of the filter tank via a pipe. A second solenoid valve electrically connected to the PLC controller is installed on the pipe. The second solenoid valve is controlled by a remote control button, and a relay is installed between the second solenoid valve and the PLC controller.

[0012] Furthermore, the system also includes a power supply module, which includes a 220V AC mains power supply and a switching power supply. The L and N terminals of the input of the switching power supply are electrically connected to the L and N terminals of the 220V AC mains power supply, respectively. The output of the switching power supply can output 24V DC voltage and 5V DC voltage.

[0013] Furthermore, the system also includes network cameras, network modules, and monitoring terminals; network cameras are installed on the tops of the sedimentation tank, clear water tank, and dam top water tank, and the network modules are respectively connected to the PLC controller, network cameras, and monitoring terminals; the monitoring terminals include PCs and smartphones.

[0014] Furthermore, the system also includes a touchscreen and indicator lights that are electrically connected to the PLC controller.

[0015] The beneficial effects of this utility model are:

[0016] The automatic water supply control system for hydropower plants provided by this utility model has a water level sensor in the dam crest pool that feeds back the water level in real time to the control terminal. When the water level is lower than a set threshold, the control terminal controls the booster pump to operate and draw water from the clear water pool to the dam crest pool for production, domestic use, and fire fighting. At the same time, the water level sensor in the clear water pool feeds back the water level to the control terminal. After the booster pump stops operating, the control terminal controls the first water source pump to operate and draw water to the sedimentation tank. Simultaneously, the control terminal controls the first metering pump to operate and draw polyaluminum chloride solution to the sedimentation tank for water purification. The water in the sedimentation tank is filtered by a filter and then enters the clear water pool. The control terminal controls the sodium hypochlorite generator to operate and produce sodium hypochlorite. Then, the control terminal controls the second metering pump to operate and draw sodium hypochlorite solution to the clear water pool for disinfection. The entire water pumping and chemical dosing process does not require manual operation, realizing automated processing, reducing labor costs, and improving work efficiency. Attached Figure Description

[0017] Figure 1 This is a structural block diagram of an embodiment of the present utility model.

[0018] Figure 2 This is a circuit block diagram of an embodiment of the present invention.

[0019] Figure 3 This is a circuit diagram of the power module according to an embodiment of the present invention.

[0020] Figure 4 This is a circuit diagram of the PLC controller according to an embodiment of the present invention.

[0021] Figure 5 This is a circuit diagram of the first water source pump and the second water source pump according to an embodiment of the present utility model.

[0022] Figure 6 This is a circuit diagram of the first metering pump and the second metering pump according to an embodiment of the present invention.

[0023] Figure 7 This is a circuit diagram of the booster pump according to an embodiment of the present invention.

[0024] Figure 8 This is a circuit diagram of the sodium hypochlorite generator and the mixer according to an embodiment of the present invention.

[0025] Figure 9 This is a circuit diagram of the first and second solenoid valves according to an embodiment of the present invention.

[0026] Figure 10 This is a circuit diagram of the three water level sensors in an embodiment of this utility model.

[0027] Figure 11 This is a circuit diagram of the remote control switch according to an embodiment of the present invention.

[0028] Figure 12 This is a circuit diagram of the signal indicator light according to an embodiment of the present invention.

[0029] Figure 13 This is a wiring diagram of the PLC controller, touch screen, and router according to an embodiment of this utility model. Detailed Implementation

[0030] The present invention will now be described in conjunction with the accompanying drawings. The specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. Various modifications and improvements to the technical solutions of the present invention made by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope of the present invention.

[0031] like Figures 1 to 13 As shown, the automatic water supply control system for the hydropower plant in this embodiment includes a sedimentation tank, a filtration tank, a polyaluminum chloride stirring tank, a clear water tank, a sodium hypochlorite generator, a dam crest water tank, a first water source pump, a first metering pump, a second metering pump, a booster pump, a water level sensor, and a control terminal.

[0032] In this embodiment, the inlet of the sedimentation tank is connected to the water intake via a pipe. A first water source pump is installed on this pipe to draw water (river water) into the sedimentation tank. The inlet of the sedimentation tank in this embodiment is connected to two pipes, each equipped with a first water source pump. Figure 1 In the middle, the two primary water source pumps are No. 1 and No. 2 water source pumps.

[0033] The polyaluminum chloride (PAC) stirring tank contains a PAC solution. Its outlet is connected to the inlet of a sedimentation tank via a pipe. A first metering pump is installed on this pipe to draw the PAC solution from the stirring tank into the sedimentation tank for water purification. In this embodiment, two pipes connect the outlet of the PAC stirring tank to the inlet of the sedimentation tank, each pipe equipped with a first metering pump. Figure 1 In this embodiment, the two first metering pumps are labeled as metering pump No. 1 and metering pump No. 2, respectively. The polyaluminum chloride (PAC) mixing tank in this embodiment is equipped with a mixer and a water level sensor to measure the solution level in the tank. The inlet and outlet of the PAC mixing tank are connected by a pipe, which is equipped with a second water source pump and a first solenoid valve. By activating the second water source pump and the first solenoid valve, water is drawn into the tank. Then, PAC (powder) is added, and the mixer is started to mix the PAC with water to form a PAC solution. Figure 1In the middle, the second water source pump is marked as water source pump No. 3, and the first solenoid valve is marked as solenoid valve No. 1.

[0034] The inlet of the filtration tank is connected to the outlet of the sedimentation tank via a pipe, and the outlet of the filtration tank is connected to the inlet of the clear water tank via a pipe. The purified water enters the clear water tank after being filtered by the filtration tank.

[0035] The sodium hypochlorite generator is used to produce sodium hypochlorite solution. Its outlet is connected to the inlet of a clear water tank via a pipeline. A second metering pump is installed on this pipeline to draw the sodium hypochlorite solution into the clear water tank for disinfection. In this embodiment, two pipelines connect the outlet of the sodium hypochlorite generator to the inlet of the sedimentation tank, each pipeline equipped with a second metering pump. Figure 1 In this embodiment, the two second metering pumps are labeled as metering pump No. 3 and metering pump No. 4, respectively. The inlet of the sodium hypochlorite generator in this embodiment is connected to the outlet of the filter tank via a pipeline. A second solenoid valve is installed on this pipeline. Opening the second solenoid valve allows water from the filter tank to flow into the sodium hypochlorite generator to dissolve the (industrial) salt in the device, turning it into a salt solution. The sodium hypochlorite generator then electrolyzes the salt solution into a sodium hypochlorite solution.

[0036] The outlet of the clear water pool is connected to the inlet of the dam crest pool via a pipeline. A booster pump is installed on this pipeline to draw water from the clear water pool to the dam crest pool. A water level sensor is installed in the clear water pool to detect the water level.

[0037] The outlet of the dam crest water tank is used to supply water for domestic, industrial and fire fighting purposes. A water level sensor is installed in the dam crest water tank to detect the water level in the tank.

[0038] The control terminal is located in the plant and is electrically connected to the sodium hypochlorite generator, two first water source pumps, two second water source pumps, two first metering pumps, two second metering pumps, a booster pump, three water level sensors, a first solenoid valve, a second solenoid valve, and a mixer. In this embodiment, the control terminal includes a PLC controller and multiple remote control buttons. The sodium hypochlorite generator, two first water source pumps, two second water source pumps, two first metering pumps, two second metering pumps, the booster pump, three water level sensors, the first solenoid valve, the second solenoid valve, the mixer, and the multiple remote control buttons are electrically connected to the PLC controller. Each of the sodium hypochlorite generator, two first water source pumps, two first metering pumps, two second metering pumps, the booster pump, the second solenoid valve, and the mixer is controlled by a remote control button, and the second water source pump and the first solenoid valve are controlled by a single remote control button.

[0039] like Figure 3As shown, the automatic water supply control system for the hydropower plant in this embodiment also includes a power supply module. The power supply module includes a 220V AC mains power supply and a switching power supply. The L and N terminals of the input of the switching power supply are electrically connected to the L and N terminals of the 220V AC mains power supply, respectively. The output of the switching power supply can output 24V DC voltage and 5V DC voltage. The sodium hypochlorite generator, two first water source pumps, a second water source pump, two first metering pumps, two second metering pumps, a booster pump, and a mixer are powered by the 220V AC mains power supply. The remaining components are powered by the output of the switching power supply. The power supply module also includes a rocker switch and a fuse FU20. The rocker switch is used to connect and disconnect the power supply, and the fuse FU20 is used to protect the circuit.

[0040] like Figures 4 to 10 As shown, in this embodiment, the sodium hypochlorite generator, two first water source pumps, a second water source pump, two first metering pumps, two second metering pumps, a booster pump, a first solenoid valve, a second solenoid valve, and a mixer are all electrically connected to the PLC controller via relays, which drive their operation. In the circuit, the sodium hypochlorite generator is represented by G, the two first water source pumps are represented by D1 and D2 respectively, the second water source pump is represented by D3, the two first metering pumps are represented by D4 and D5 respectively, the two second metering pumps are represented by D6 and D7 respectively, the booster pump is represented by D8, the water level sensor in the polyaluminum chloride mixing tank is represented by J1, the water level sensor in the clear water tank is represented by J2, the water level sensor in the dam crest water tank is represented by J3, the first solenoid valve is represented by M1, the second solenoid valve is represented by M2, the mixer is represented by B, and the relays are represented by KA1, KA2...KAn.

[0041] Taking the first water source pump D1 as an example, the output terminal Q0.0 of the PLC controller is electrically connected to the positive terminal of the coil of relay KA1, the negative terminal of the coil of relay KA1 is electrically connected to the GND terminal, the normally open terminal of relay KA1 is electrically connected to the L terminal of the 220V mains power supply, the common terminal is electrically connected to the L terminal of the power supply of the first water source pump D1, and the N terminal of the power supply of the first water source pump D1 is electrically connected to the L terminal of the 220V mains power supply. When the output terminal Q1.0 of the PLC controller outputs a signal, the coil of relay KA1 is energized, and the normally open terminal of relay KA1 closes. At this time, the power supply of the first water source pump D1 is turned on and it starts to work. When the PLC controller does not output a signal, relay KA1 is not turned on, and the first water source pump D1 does not work. The circuit connection methods of the remaining first water source pump, second water source pump, two first metering pumps, two second metering pumps, booster pump, sodium hypochlorite generator, and mixer are the same as those of the first water source pump D1.

[0042] Taking the first solenoid valve M1 as an example, the output terminal Q1.2 of the PLC controller is electrically connected to the positive terminal of the coil of relay KA11, the negative terminal of the coil of relay KA11 is electrically connected to the GND terminal, the normally open terminal of relay KA11 is electrically connected to the positive terminal of the 24V DC output of the switching power supply, and the common terminal is electrically connected to the positive terminal of the power supply of the first solenoid valve M1. The negative terminal of the power supply of the first solenoid valve M1 is electrically connected to the GND terminal. When the output terminal Q1.2 of the PLC controller outputs a signal, the coil of relay KA11 is energized, and the normally open terminal of relay KA11 closes. At this time, the first solenoid valve M1 conducts, and the pipeline it is in is connected. When the PLC controller does not output a signal, the first solenoid valve M1 does not conduct. The circuit connection method of the second solenoid valve M2 is the same as that of the first solenoid valve M1.

[0043] In the circuit, the remote control switches corresponding to the first water source pump D1, the first water source pump D2, the second water source pump D3, the first solenoid valve M1, the first metering pump D4, the first metering pump D5, the second metering pump D6, the second metering pump D7, the booster pump D8, the second solenoid valve M2, the mixer G, and the sodium hypochlorite generator J are KD1, KD2, KD3, KD4, KD5, KD6, KD7, KD8, KD9, KD10, and KD11, respectively. Taking the remote control switch KD1 as an example, closing KD1 inputs a control command to the PLC controller. After the PLC controller receives the command, its output terminal Q1.0 outputs a signal, energizing the coil of relay KA1. The normally open terminal of relay KA1 closes, at which point the power supply terminal of the first water source pump D1 is turned on and starts working. Disconnecting KD1 stops the PLC controller from outputting a signal, relay KA1 is de-energized, and the first water source pump D1 stops working, thus achieving the purpose of remote manual control.

[0044] To monitor whether the two primary water pumps, the secondary water pump, and the booster pump have malfunctioned, the PLC controller is electrically connected to the touch screen and signal indicator lights. Current sensors are installed between the two primary water pumps, the secondary water pump, and the booster pump and the relay. The current sensors are connected in series between the common terminal of the relay and the L terminal of the power supply of the primary water pump, the secondary water pump, and the booster pump. Their signal output terminals are electrically connected to the signal input terminals of the PLC controller. The PLC controller is used to convert the detection signals of the current sensors into current values. The current sensors are represented by PA1, PA2, ..., PAn in the circuit. Two primary water pumps, a secondary water pump, and a booster pump each correspond to two indicator lights. In the circuit, the two indicator lights corresponding to the primary water pump D1 are LD1 and LD2; those corresponding to the primary water pump D2 are LD3 and LD4; those corresponding to the secondary water pump D2 are LD5 and LD6; and those corresponding to the booster pump D8 are LD7 and LD8. Taking the primary water pump D1 as an example, when the value detected by the current sensor PA1 is abnormal, the PLC controller will control indicator light LD2 to illuminate and simultaneously control the primary water pump D1 to stop working; when the value is normal, the PLC controller will control indicator light LD1 to illuminate. Of course, current sensors and indicator lights indicating whether they are working properly can also be added to the circuits of other devices. The current sensor and water level sensor in this embodiment are common sensors in the prior art.

[0045] The PLC controller and the touch screen are connected via an RJ45 interface. The touch screen can send commands to the PLC controller and display the values ​​detected by each sensor. When the sensor values ​​are abnormal, the touch screen will issue an alarm.

[0046] In addition, the sodium hypochlorite generator, the two first water source pumps, the second water source pump, the two first metering pumps, the two second metering pumps, the booster pump, the first solenoid valve, the second solenoid valve, and the relays connected to the mixer are all connected in parallel with local manual switches, which are represented by K1, K2...Kn in the circuit. Taking the first water source pump D1 as an example, its corresponding local manual switch is K1. One end of switch K1 is connected to the normally open terminal of relay KA1, and the other end is electrically connected to the power supply terminal L of the first water source pump D1. Closing switch K1 can energize the first water source pump D1 and start working. Opening switch K1 will stop the first water source pump D1 from working, thereby realizing the purpose of on-site control of the equipment.

[0047] The sodium hypochlorite generator, two first water source pumps, two second water source pumps, two first metering pumps, two second metering pumps, booster pump, the power supply terminal L of the sodium hypochlorite generator and the mixer, and the common terminal of the relay are all equipped with fuses for circuit protection, denoted as FU11, FU12...FU1n.

[0048] Furthermore, the automatic water supply control system for the hydropower plant in this embodiment also includes network cameras, network modules, and a monitoring terminal. Network cameras are installed on the tops of the sedimentation tank, clear water tank, and dam crest water tank to monitor the water levels and the safety of the surrounding environment. The network modules are communicatively connected to the PLC controller, network cameras, and monitoring terminal. In this embodiment, the network module is a router. A network is deployed in the sedimentation tank, clear water tank, and dam crest water tank. After being powered on, the router can connect to the network and generate a WiFi signal. The monitoring terminal in this embodiment is a PC or a smartphone, where the PC can be a laptop. The network port of the PLC controller is connected to the router via a network cable, enabling the PLC controller to connect to the network and achieve wireless communication with the monitoring terminal. The operator can send commands to the PLC controller via the wireless network through the monitoring terminal, thereby achieving remote operation of the PLC controller.

[0049] The network camera in this embodiment is a new generation product combining traditional cameras with network video technology. In addition to possessing all the image capture functions of a typical traditional camera, it also incorporates a built-in digital compression controller and a web-based operating system. This allows video data to be compressed and encrypted before being transmitted to the end user via a local area network, the internet, or a wireless network. The network camera can connect to the Wi-Fi signal generated by a router to achieve network connectivity. The monitoring terminal has a corresponding monitoring client installed. The operator adds the device and performs the necessary settings in the client management interface, thus establishing a wireless connection between the monitoring terminal and the network camera. The operator can then monitor the network camera's output and oversee the security of the surrounding environment of the pool where the network camera is located by opening the client.

[0050] In this embodiment of the hydropower plant's automatic water supply control system, the water level sensor in the dam crest pool feeds back the water level to the PLC controller in real time. When the water level is below a set threshold, the PLC controller controls the booster pump to operate and draw water from the clear water pool to the dam crest pool for production, domestic use, and fire fighting. When the water level in the dam crest pool reaches the set threshold, the PLC controller controls the booster pump to stop operating. Simultaneously, the water level sensor in the clear water pool feeds back the water level to the control terminal. After the booster pump stops operating, the PLC controller controls two first water source pumps to operate, drawing water to the sedimentation tank. Simultaneously, it controls two first metering pumps to operate, drawing polyaluminum chloride solution to the sedimentation tank for water purification. The water in the sedimentation tank is filtered through a filter tank before entering the clear water pool. The LC controller controls the second solenoid valve to allow water from the filtration tank to flow into the sodium hypochlorite generator to dissolve the industrial salt in the generator. Simultaneously, the PLC controller controls the sodium hypochlorite generator to produce sodium hypochlorite solution. When the water level sensor in the clear water tank detects that the water level has reached the set threshold, the PLC controller controls the two first water source pumps and the second solenoid valve to stop working. Then, the PLC controller controls the second metering pump to draw the sodium hypochlorite solution into the clear water tank for disinfection. When the water level in the dam crest pool is low, the PLC controller controls the booster pump to draw water from the clear water tank. This process is repeated, thus eliminating the need for manual operation in the entire pumping and dosing process, achieving automated processing, reducing labor costs, and improving work efficiency.

[0051] When the water level sensor in the polyaluminum chloride (PAC) mixing tank detects a low water level, the touchscreen will issue an alarm. Personnel must then go to the site to add PAC to the tank, followed by closing the corresponding local switch to activate the second water pump and the first solenoid valve. Water will be drawn into the tank, PAC will be added, and then the mixer will be started to mix the added PAC and water to form a PAC solution for later use. Alternatively, personnel can also control the second water pump, the first solenoid valve, and the mixer remotely, depending on the situation.

Claims

1. An automatic water supply control system for a hydroelectric plant, characterized by It includes a sedimentation tank, a filtration tank, a polyaluminum chloride mixing tank, a clear water tank, a sodium hypochlorite generator, a dam crest water tank, a first water source pump, a first metering pump, a second metering pump, a booster pump, a water level sensor, and a control terminal; The inlet of the sedimentation tank is connected to the water intake via a pipe, and a first water source pump is installed on the pipe. The inlet of the filter tank is connected to the outlet of the sedimentation tank via a pipe, and the outlet of the filter tank is connected to the inlet of the clear water tank via a pipe. The polyaluminum chloride stirring tank contains a polyaluminum chloride solution, and its outlet is connected to the inlet of the sedimentation tank through a pipeline. A first metering pump is installed on the pipeline. The sodium hypochlorite generator is used to produce sodium hypochlorite solution. Its outlet is connected to the inlet of the clear water tank through a pipeline, and a second metering pump is installed on the pipeline. The outlet of the clear water pool is connected to the inlet of the water pool on the top of the dam via a pipeline, which is equipped with a booster pump. The outlet of the dam crest pool is used to supply water for domestic, industrial, and fire-fighting purposes; Water level sensors are installed in the polyaluminum chloride mixing tank, clear water tank, and dam top water tank; The control unit is located in the plant building and is electrically connected to the sodium hypochlorite generator, the first water source pump, the first metering pump, the second metering pump, the booster pump, and the water level sensor.

2. The automatic water supply control system for hydropower plants according to claim 1, characterized in that, The control terminal includes a PLC controller and multiple remote control buttons. The sodium hypochlorite generator, the first water source pump, the first metering pump, the second metering pump, the booster pump, the water level sensor, and the multiple remote control buttons are electrically connected to the PLC controller. The sodium hypochlorite generator, the first water source pump, the first metering pump, the second metering pump, and the booster pump are each controlled by a remote control button.

3. The automatic water supply control system for hydropower plants according to claim 2, characterized in that, Relays are installed between the sodium hypochlorite generator, the first water source pump, the first metering pump, the second metering pump, the booster pump, and the PLC controller.

4. The automatic water supply control system for a hydropower plant according to claim 3, characterized in that, The inlet and outlet of the polyaluminum chloride mixing tank are connected by a pipe. A second water source pump and a first solenoid valve are installed on the pipe and electrically connected to the PLC controller. The second water source pump and the first solenoid valve are controlled by a remote control button, and relays are installed between the second water source pump and the first solenoid valve and the PLC controller.

5. The automatic water supply control system for a hydropower plant according to claim 4, characterized in that, A current sensor is installed between the first water source pump, the second water source pump, and the booster pump and the relay. The signal output terminal of the current sensor is electrically connected to the PLC controller.

6. The automatic water supply control system for a hydropower plant according to claim 2, characterized in that, The polyaluminum chloride mixing tank is equipped with a mixer electrically connected to a PLC controller. The mixer is controlled by a remote control button, and a relay is installed between the mixer and the PLC controller.

7. The automatic water supply control system for a hydropower plant according to claim 2, characterized in that, The inlet of the sodium hypochlorite generator is connected to the outlet of the filter tank via a pipe. A second solenoid valve, which is electrically connected to the PLC controller, is installed on the pipe. The second solenoid valve is controlled by a remote control button. A relay is installed between the second solenoid valve and the PLC controller.

8. The automatic water supply control system for a hydropower plant according to claim 2, characterized in that, It also includes a power supply module, which includes a 220V AC mains power supply and a switching power supply. The L and N terminals of the input of the switching power supply are electrically connected to the L and N terminals of the 220V AC mains power supply, respectively. The output of the switching power supply can output 24V DC voltage and 5V DC voltage.

9. The automatic water supply control system for a hydropower plant according to claim 2, characterized in that, It also includes network cameras, network modules, and monitoring terminals; network cameras are installed on the tops of sedimentation tanks, clear water tanks, and dam top water tanks, and the network modules are respectively connected to the PLC controller, network cameras, and monitoring terminals; the monitoring terminals include PCs and smartphones.

10. The automatic water supply control system for a hydropower plant according to claim 2, characterized in that, It also includes a touchscreen and indicator lights that are electrically connected to the PLC controller.

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