Water diversion type cascade series hydropower station pipeline valve linkage joint debugging system and method

Abstract

The invention provides a water diversion type cascade series hydropower station pipeline valve linkage joint debugging system and method. The lower portion of a water diversion tunnel is communicated with a flow balance discharge hole, the tail end of the water diversion tunnel is connected with a plurality of water diversion branch holes, the other ends of the water diversion branch holes are connected with a unit through unit ball valves, and the unit is connected with a regulating reservoir through a tail water tunnel; the flow balance discharge hole is connected with the regulating valve through the discharge ball valve; the release ball valve adopts an electromagnetic valve and is connected with the regulating valve control system through a first signal line; the regulating valve adopts an electric regulating valve and is connected with the regulating valve control system through a second signal line; a plurality of water level gauges are arranged in the regulating tank and are connected with the regulating valve control system through a third signal line. The system adopts an intelligent regulating valve control system and a regulating valve control system, wherein the regulating valve control system is mainly responsible for collecting the water level of a regulating tank, analyzing water level data, calculating the opening change of a regulating valve and issuing an instruction.

Description

Technical Field

[0001] The invention belongs to the technical field of hydropower station construction and hydropower station operation and maintenance, and in particular designs a water diversion type cascade series hydropower station pipeline valve linkage joint adjustment system and method. Background Art

[0002] The diversion cascade hydropower station is usually a multiple hydropower station connected in series by multiple diversion tunnels with gentle slopes in the river sections with large slopes and concentrated drop, which are not convenient for damming. However, in the process of hydropower station operation and maintenance, the failure or maintenance of individual units is inevitable. When the unit fails or is under maintenance, the diversion cascade hydropower station will close the ball valve of the unit. Since the tailwater tunnel of the upper level of the tunnel diversion cascade hydropower station is directly connected to the diversion tunnel of the lower level, the closing of the ball valve of the unit will cause the water to be unable to discharge, and then the units of the upstream and downstream hydropower stations connected to the unit must also close the ball valves to avoid water overflow and safety accidents.

[0003] In order to solve the above problems, a flow balancing discharge hole is connected to the water diversion tunnel to ensure that the flow is discharged from the flow balancing discharge hole to the regulating tank during unit maintenance. After the flow enters the regulating tank, the water level in the regulating tank will change drastically, which will affect the power generation of the lower hydropower station. At this time, the water level of the regulating tank needs to be adjusted. The traditional adjustment method is mainly adjusted manually. The traditional method of manually adjusting the flow balancing spillway valve can restore the water level of the regulating tank to the normal water level, but it is time-consuming, unstable and inefficient. Summary of the invention

[0004] In order to solve the current technical problems, the main purpose of the present invention is to provide a water diversion cascade series hydropower station pipeline valve linkage and adjustment system and method. This system adopts an intelligent regulating valve control system and a regulating valve control system. The regulating valve control system is mainly responsible for collecting the water level of the regulating pool, analyzing the water level data, calculating the change of the regulating valve opening and issuing instructions; the regulating valve control system is mainly responsible for receiving the instructions of the regulating valve control system and controlling the change of the regulating valve opening.

[0005] In order to realize the above technical features, the object of the present invention is achieved as follows: a water diversion type cascade series hydropower station pipeline valve linkage and joint adjustment system, including a water diversion tunnel, a flow balance discharge tunnel is connected below the water diversion tunnel, the end of the water diversion tunnel is connected to a plurality of water diversion branch tunnels, the other end of the water diversion branch tunnel is connected to the unit through the unit ball valve, and the unit is connected to the regulating tank through the tailwater tunnel; The flow balance discharge hole is connected to the regulating valve through the discharge ball valve; The discharge ball valve adopts a solenoid valve and is connected to the regulating valve control system through a first signal line, and the regulating valve adopts an electric regulating valve and is connected to the regulating valve control system through a second signal line; A water level gauge is arranged inside the regulating tank, and the water level gauge is connected to the regulating valve control system through a third signal line.

[0006] The flow balance discharge hole is connected with the water diversion tunnel through the first bifurcation pipe.

[0007] The water diversion branch tunnel is connected with the water diversion tunnel through a second bifurcated pipe.

[0008] The ball valve and the unit are both arranged inside the factory building.

[0009] The pipeline after the regulating valve is connected to the regulating tank through the energy dissipation facility.

[0010] The discharge ball valve and the regulating valve are both arranged inside the valve chamber.

[0011] The regulating pool is connected to a water diversion tunnel via a lower-level water inlet, and a pressure regulating chamber is arranged on the water diversion tunnel.

[0012] A method for adjusting a water diversion type cascade series hydropower station pipeline valve linkage and adjustment system, comprising the following steps: Step 1: When the water level in the regulating pool changes, the water level meter records the water level and feeds it back to the regulating valve control system; Step 2: After the regulating valve control system obtains the water level change information, if the water level change difference is greater than the allowable height difference, the unit ball valve is opened to the maximum according to the actual water level change, and the regulating valve should be in the maximum opening state; Step 3: The regulating valve adopts a piston regulating valve, and the manufacturer tests and determines the flow rate and opening relationship curve of the regulating valve itself; when the discharge ball valve is opened to the maximum, the water level of the regulating pool will reach a value, and the water level meter records the water level and feeds it back to the regulating valve control system; Step 4: The regulating valve control system obtains the water level fed back by the water level meter and compares it with the original water level, and calculates the change relationship of the regulating valve opening degree with time according to the input flow-opening relationship of the regulating valve and the regulating tank parameters; Step 5: After the regulating valve control system calculates the opening change data, the command is issued to the regulating valve transmission device, and the regulating valve transmission device controls the regulating valve according to the obtained opening change data. The change in the opening size of the regulating valve will cause the change in the flow rate, and finally the water level of the regulating tank is restored to the normal water level; Step 6: After the opening of the regulating valve is adjusted, the opening is stabilized at a suitable value. Under this opening, the flow rate of the regulating valve is consistent with the outlet flow rate; Step 7: After the regulating valve is stable, the water level meter records the water level again and feeds the information back to the regulating valve control system; Step 8. The regulating valve control system obtains the water level feedback from the water level gauge and compares it with the normal water level. If the error is within the allowable range, the water level in the regulating tank is normal. If the water level is too high or too low, return to step 4 for calculation and follow steps 4 to 8 until the water level is normal.

[0013] The step 1 specifically includes: After a unit fails, the water level in the regulating pool will drop because the outflow of water is greater than the inflow. There are multiple water level gauges arranged around the regulating pool. The water level gauges record the water level data at a certain time interval. The water level data is transmitted to the regulating valve control system through the third signal line. The step 2 specifically includes: The regulating valve control system obtains the water level data transmitted by the water level gauge, comprehensively analyzes the data of multiple water level gauges, calculates the average value and compares it with the normal water level data; if the error is within the control range, no response is made; if the recorded water level is lower than the normal water level and the difference is greater than the controllable error, the regulating valve control system is adjusted according to the state: if the discharge ball valve is in the ball valve closed state, the regulating valve control system sends a valve opening command to the discharge ball valve, which is transmitted to the ball valve motor through the data line; if the discharge ball valve is in the fully open state, an adjustment command is sent to the motor of the regulating valve, and at the same time, the regulating valve control system will no longer compare the water level information fed back by the water level gauge with the normal water level until the regulating valve feeds back information.

[0014] The step 3 specifically includes: The water inlet flow valve is divided into two parts. First, the water flows through the discharge ball valve. The discharge ball valve only determines whether the water flows through or not. Its opening has only two options: 0 and 1. After passing through the discharge ball valve, the water flows through the regulating valve. The regulating valve adopts a piston valve. The flow and opening curve relationship of the valve is provided by the manufacturer. The data provided is divided into two forms: the first type, the flow-opening relationship can be expressed by one or more existing mathematical functions. , where Q represents the flow rate, N represents the number of functions, and A represents the opening, then the function relationship can be directly input into the computer to record it; the second type can only get a flow-opening curve relationship, and there is no specific one or more functions to describe the function. Then the opening is divided into M parts from 0 to 1 in an average way of differentiation. There are M+1 opening values ​​in the opening from 0 to 1. The larger M is, the more accurate the calculation is. After the opening is divided into M parts, the flow corresponding to the M+1 opening values ​​is recorded in the computer in a one-to-one correspondence according to the flow opening curve; The regulating valve is at the maximum opening when the regulating valve control system is not started. When the regulating valve control system issues an instruction to start the discharge ball valve to determine the machine, the discharge ball valve begins to open at the maximum rate. When the opening of the discharge ball valve is 1, its motor feeds back a value to the regulating valve control system.

[0015] Specifically included in step 4 is as follows: After the regulating valve control system obtains the information fed back by the ball valve motor, it shuts down the ball valve motor and feeds back the shutdown information to the regulating valve control system. At the same time, the regulating valve control system starts the water level information comparison process again, compares the real-time water level fed back by the water level gauge with the normal water level of the regulating pond, calculates based on the real water level and the target water level, the opening of the regulating valve is controlled by the motor, the motor has the property of uniform rotation, the relationship between the opening and time is provided by the manufacturer and is represented by the function g(x). The specific calculation process is as follows: (1) According to the real water level being lower than the normal water level: Denote the normal flow rate as Q0, the corresponding normal opening as A0, the normal water level as 0, the actual water level as H. If the water level is lower than the normal water level, then H is negative, otherwise it is positive. The bottom area of the regulating pond is S, then calculate the amount of water W required to reach the normal water level: ; Calculate the cumulative water volume W1 in the regulating pond when the opening of the regulating valve is adjusted from the maximum to the normal opening A0: ; In the formula, M0 and T0 represent the opening position and the corresponding time point stored in the computer at the normal opening; M and T are the maximum opening storage position and the corresponding time; A i and t i represent the opening and time at a certain position; Q 进 , Q 出 are respectively the flow rate entering the regulating pond and the flow rate flowing out of the regulating pond; Δt is the unit time, determined according to the accuracy; After calculating the cumulative water volume W1 in the regulating pond when the opening of the regulating valve is adjusted from the maximum to the normal opening A0, the regulating valve control system compares W1 and W and issues commands in the following three cases: ① If W1 = W, the analysis system issues a command to make the regulating valve motor adjust the opening of the regulating valve from the maximum to A0; ② If W1 < W, the analysis system makes the following calculations: ; In the formula: T1 is the duration when the regulating valve is at the maximum opening, Q 进max is the inlet flow rate when the opening is the largest,.

[0016] The regulating valve control system issues a command to make the regulating valve motor start after T1 time and adjust the regulating valve to the normal opening; ③ If W1 > W, the following recalculation is required: ; Comparison of Control Valve Control Systems and ; In the first case, if , then calculate as follows: ; Where: T x is the motor rotation stop time, T x >0; Find T x The above equation needs to be solved. The binary method is used to solve the above equation, that is, first calculate The accumulated water volume to T0 is Compare, if greater than , then calculate The accumulated water volume to T0, and vice versa The accumulated water volume to T0; and so on, until T x ; The control valve control system issues a command to make the control valve motor rotate T x Then rotate in the opposite direction to return to the normal opening position; In the second case, if , then calculate according to the following formula: ; Where: Indicates the time it takes for the valve to open to the minimum; The control valve control system issues a command to make the control valve motor adjust the valve opening to the minimum and then continue time, and then return to normal opening; (2) According to the actual water level higher than the normal water level: When the regulating valve control system obtains that the actual water level is higher than the normal water level, it directly issues a command to the regulating valve motor to adjust the regulating valve opening to the normal opening. At the same time, the water level gauge records the water level h2 again and feeds it back to the regulating valve control system. The surplus water in the regulating tank is calculated as W3=Sh2. At this time, it returns to the state ③ in (1). W3 is W1-W. The calculation is performed and the command is issued according to the above steps.

[0017] The present invention has the following beneficial effects: 1. This system adopts intelligent regulating valve control system and regulating valve control system. The regulating valve control system is mainly responsible for collecting the water level of the regulating pool, analyzing the water level data, calculating the change of the regulating valve opening and issuing instructions; the regulating valve control system is mainly responsible for receiving instructions from the regulating valve control system and controlling the change of the regulating valve opening.

[0018] 2. The first bifurcated pipe mentioned above facilitates reliable connection between the flow balance discharge hole and the water diversion tunnel.

[0019] 3. Through the above-mentioned second bifurcated pipe, a reliable connection between the water diversion branch tunnel and the water diversion tunnel can be achieved.

[0020] 4. The above arrangement makes it easier to control the unit inside the plant later.

[0021] 5. Energy dissipation is facilitated by the above-mentioned energy dissipation facilities.

[0022] 6. The above-mentioned valve chamber facilitates the subsequent control of the discharge ball valve.

[0023] 7. The above arrangement facilitates the subsequent water supply to the lower-level power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a system diagram of the present invention.

[0026] Figure 2 It is a water level adjustment process diagram of the present invention.

[0027] Figure 3 It is a schematic diagram of the change of water level in the upstream regulating tank after the shutdown of the present invention.

[0028] Figure 4 It is a schematic diagram of the change in water level in the downstream regulating tank after the present invention is shut down.

[0029] In the figure: diversion tunnel 1, first bifurcation pipe 2, second bifurcation pipe 3, diversion branch tunnel 4, powerhouse 5, valve 6, unit 7, tailwater tunnel 8, regulating tank 9, lower water inlet 10, diversion tunnel 11, surge chamber 12, flow balance discharge hole 13, valve chamber 14, discharge ball valve 15, first signal line 16, regulating valve 17, second signal line 18, regulating valve control system 19, water level gauge 20, energy dissipation facility 21, third signal line 22. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0031] See also Figure 1-4A water diversion type cascade series hydropower station pipeline valve linkage and joint adjustment system, including a water diversion tunnel 1, a flow balance discharge hole 13 is connected below the water diversion tunnel 1, and the end of the water diversion tunnel 1 is connected to multiple water diversion branch holes 4, and the other end of the water diversion branch hole 4 is connected to the unit 7 through the unit ball valve 6, and the unit 7 is connected to the regulating tank 9 through the tailwater tunnel 8; the flow balance discharge hole 13 is connected to the regulating valve 17 through the discharge ball valve 15; the discharge ball valve 15 adopts an electromagnetic valve and is connected to the regulating valve control system 19 through a first signal line 16, and the regulating valve 17 adopts an electric regulating valve and is connected to the regulating valve control system 19 through a second signal line 18; a water level meter 20 is arranged inside the regulating tank 9, and the water level meter 20 is connected to the regulating valve control system 19 through a third signal line 22. This system uses an intelligent regulating valve control system and a regulating valve control system. The regulating valve control system is mainly responsible for collecting the water level of the regulating pool, analyzing the water level data, calculating the change in the opening of the regulating valve, and issuing instructions; the regulating valve control system is mainly responsible for receiving instructions from the regulating valve control system and controlling the change in the opening of the regulating valve. In the specific scheduling process, when a unit fails and needs to be repaired, it is only necessary to close the corresponding unit ball valve 6, then open the discharge ball valve 15, and control the regulating valve 17 according to the required water level, and then control the flow through the regulating valve 17.

[0032] Furthermore, the flow balance discharge hole 13 is connected to the water diversion tunnel 1 through the first bifurcated pipe 2. The first bifurcated pipe 2 facilitates reliable connection between the flow balance discharge hole 13 and the water diversion tunnel 1.

[0033] Furthermore, the water diversion branch tunnel 4 is connected to the water diversion tunnel 1 through the second bifurcated pipe 3. Through the second bifurcated pipe 3, a reliable connection between the water diversion branch tunnel 4 and the water diversion tunnel 1 can be achieved.

[0034] Furthermore, the ball valve 6 and the unit 7 are both arranged inside the plant 5. Through the above arrangement, it is convenient to control the unit 7 inside the plant 5 later.

[0035] Furthermore, the pipeline after the regulating valve 17 is connected to the regulating tank 9 through the energy dissipation facility 21. The energy dissipation facility 21 facilitates energy dissipation.

[0036] Furthermore, the discharge ball valve 15 and the regulating valve 17 are both arranged inside the valve chamber 14. Through the valve chamber 14, it is convenient to control the discharge ball valve 15 later.

[0037] Furthermore, the regulating pool 9 is connected to a water diversion tunnel 11 through a lower water inlet 10, and a pressure regulating chamber 12 is provided on the water diversion tunnel 11. The above arrangement facilitates subsequent water supply to the lower power station.

[0038] Embodiment 2: A method for adjusting a water diversion type cascade series hydropower station pipeline valve linkage and adjustment system, comprising the following steps: Step 1: When the water level in the regulating tank 9 changes, the water level meter 20 records the water level and feeds it back to the regulating valve control system 19; The specific process is as follows: after a unit 7 fails, the water level in the regulating tank 9 will drop because the outflow of water is greater than the inflow. A plurality of water level gauges 20 are arranged around the regulating tank 9. The water level gauges 20 record water level data at a certain time interval. The water level data is transmitted to the regulating valve control system 19 via the third signal line 22. Step 2: After the regulating valve control system 19 obtains the water level change information, it opens the unit ball valve 6 to the maximum according to the water level, wherein the regulating valve 17 should be in the maximum opening state; The specific process is as follows: the regulating valve control system 19 obtains the water level data transmitted by the water level meter, comprehensively analyzes the data of multiple water level meters 20, calculates the average value and then compares it with the normal water level data; if the error is within the control range, no response is made; if the recorded water level is lower than the normal water level and the difference is greater than the controllable error, the regulating valve control system 19 is adjusted according to its state: if the discharge ball valve 15 is in the ball valve closed state, the regulating valve control system 19 issues a valve opening command to the discharge ball valve 15, which is transmitted to the ball valve motor through the data line; if the discharge ball valve 15 is in the fully open state, the motor of the regulating valve 17 issues a command, and at the same time, the regulating valve control system will no longer compare the water level information fed back by the water level meter with the normal water level until the regulating valve control system feeds back information.

[0039] Step 3, the regulating valve 17 adopts a piston regulating valve, and according to the flow rate and opening relationship curve given by the regulating valve itself, when the discharge ball valve is opened to the maximum, the water level of the regulating tank 9 will reach a value, and the water level meter 20 records the water level and feeds it back to the regulating valve control system 19; The specific process is as follows: the water inlet flow valve is divided into two parts. First, the water flows through the discharge ball valve 15. The discharge ball valve 15 only determines whether the water flows through or not. Its opening has only two options: 0 and 1. After passing through the discharge ball valve 15, the water flows through the regulating valve 17. The regulating valve 17 adopts a piston valve. The flow and opening curve relationship of the valve is provided by the manufacturer. The provided data is divided into two forms: the first type, the flow-opening relationship can be expressed by one or more existing mathematical functions. , where Q represents the flow rate, N represents the number of functions, and A represents the opening, then the function relationship can be directly input into the computer to record it; the second type can only get a flow-opening curve relationship, and there is no specific one or more functions to describe the function. Then the opening is divided into M parts from 0 to 1 in an average way of differentiation. There are M+1 opening values ​​in the opening from 0 to 1. The larger M is, the more accurate the calculation is. After the opening is divided into M parts, the flow corresponding to the M+1 opening values ​​is recorded in the computer in a one-to-one correspondence according to the flow opening curve; The regulating valve 17 is at the maximum opening when the regulating valve control system 19 is not started. When the regulating valve control system 19 issues an instruction to start the discharge ball valve 15 to determine the machine, the discharge ball valve 15 begins to open at the maximum rate. When the opening of the discharge ball valve 15 is 1, the motor feeds back a value to the regulating valve control system 19.

[0040] Step 4, the regulating valve control system 19 obtains the water level fed back by the water level meter and compares it with the original water level, and calculates the relationship between the opening of the regulating valve 17 and the time according to the input flow-opening relationship of the regulating valve 17 and the regulating tank parameters; The specific process is as follows: after the regulating valve control system obtains the feedback information from the ball valve motor, it closes the ball valve motor and feeds back to the regulating valve control system. At the same time, the regulating valve control system starts the water level information comparison process again, compares the real-time feedback water level of the water level meter with the normal water level of the regulating tank, and calculates based on the actual water level and the target water level. The opening of the regulating valve is controlled by the motor, which has the property of uniform rotation. The relationship between the opening and time is provided by the manufacturer and is expressed by the function g(x). The specific calculation process is as follows: (1) If the actual water level is lower than the normal water level: Let the normal flow be Q0, the corresponding normal opening be A0, the normal water level be 0, the actual water level be H, if the water level is lower than the normal water level, H is a negative number, otherwise it is a positive number, the bottom area of ​​the regulating pool is S, then calculate the amount of water W required to reach the normal water level: ; Calculate the cumulative water volume W1 in the regulating tank when the opening of the regulating valve 17 is adjusted from the maximum to the normal opening A0: ; Where, M0 and T0 represent the opening position and corresponding time point stored in the computer at normal opening; M and T represent the maximum opening storage position and corresponding time; A i and t i Indicates the opening and time of a certain position; Q 进 , Q 出 are the flow rate entering the regulating pool and the flow rate flowing out of the regulating pool respectively; Δt is the unit time, which is determined according to the accuracy; Calculate the cumulative water volume W1 in the regulating tank when the opening of the regulating valve 17 is adjusted from the maximum to the normal opening A0. The regulating valve control system compares W1 with W and issues commands in the following three cases: ① If W1 = W, the analysis system issues a command to make the regulating valve motor adjust the opening of the regulating valve 17 from the maximum to A0; ② If W1 < W, the analysis system makes the following calculations: ; Where: T1 is the duration when the regulating valve is at the maximum opening, Q 进max is the inlet flow rate when the opening is the largest,.

[0041] The regulating valve control system issues a command to make the regulating valve motor start after T1 time and adjust the regulating valve to the normal opening; ③ If W1 > W, the following recalculations are needed: ; The regulating valve control system compares and ; In the first case, if , then calculate according to the following formula: ; Where: T x is the motor rotation stop time, T x > 0; Obtain T x The above equation needs to be solved. Use the bisection method to solve the above equation, that is, first calculate the cumulative water volume to T0 and compare it with . If it is greater than , then calculate the cumulative water volume to T0, otherwise calculate the cumulative water volume to T0; and so on until T x is calculated; then the regulating valve control system issues a command to make the regulating valve motor rotate for T x and then rotate backward to the normal opening position; In the second case, if , then calculate according to the following formula: ; Where: represents the time that needs to be maintained after the valve opening reaches the minimum; Then the regulating valve control system issues a command to make the regulating valve motor adjust the valve opening to the minimum and maintain it for time, and then return to the normal opening; (2)According to the actual water level being higher than the normal water level: When the regulating valve control system obtains that the actual water level is higher than the normal water level, it directly issues a command to the regulating valve motor to adjust the regulating valve opening to the normal opening. At the same time, the water level gauge records the water level h2 again and feeds it back to the regulating valve control system. The surplus water in the regulating tank is calculated as W3=Sh2. At this time, it returns to the state ③ in (1). W3 is W1-W. The calculation is performed and the command is issued according to the above steps.

[0042] Step 5: After the regulating valve control system 19 calculates the opening change data, it issues a command to the regulating valve transmission device, and the regulating valve transmission device controls the regulating valve 17 according to the obtained opening change data. The change in the opening size of the regulating valve 17 will cause the flow rate to change, and finally the water level of the regulating tank is restored to the normal water level; Step 6: After the opening adjustment of the regulating valve 17 is completed, the opening is stabilized at a suitable value, at which the flow rate of the regulating valve 17 is consistent with the outlet flow rate; Step 7: After the regulating valve 17 is stable, the water level meter records the water level again and feeds the information back to the regulating valve control system 19; Step 8, the regulating valve control system 19 obtains the water level feedback from the water level meter and compares it with the normal water level. If the error is within the allowable range, it shows that the water level in the regulating tank is normal. If the water level is too high or too low, it returns to step 4 for calculation and proceeds according to steps 4 to 8 until the water level is normal.

Claims

1. A water diversion type cascade series hydropower station pipeline valve linkage and adjustment system, characterized by: It comprises a water diversion tunnel (1), the lower part of the water diversion tunnel (1) is connected to a flow balance discharge tunnel (13), the end of the water diversion tunnel (1) is connected to a plurality of water diversion branch tunnels (4), the other end of the water diversion branch tunnel (4) is connected to a unit (7) through a unit ball valve (6), and the unit (7) is connected to a regulating tank (9) through a tailwater tunnel (8); The flow balance discharge hole (13) is connected to the regulating valve (17) via the discharge ball valve (15); The discharge ball valve (15) adopts a solenoid valve and is connected to the regulating valve control system (19) via a first signal line (16); the regulating valve (17) adopts an electric regulating valve and is connected to the regulating valve control system (19) via a second signal line (18); A water level meter (20) is provided inside the regulating tank (9), and the water level meter (20) is connected to the regulating valve control system (19) via a third signal line (22).

2. According to claim 1, a water diversion type cascade series hydropower station pipeline valve linkage and adjustment system is characterized by: The flow balance discharge hole (13) is connected to the water diversion tunnel (1) via the first bifurcated pipe (2).

3. According to claim 1, a water diversion type cascade series hydropower station pipeline valve linkage and adjustment system is characterized by: The water diversion branch tunnel (4) is connected to the water diversion tunnel (1) via a second bifurcated pipe (3).

4. According to claim 1, a water diversion type cascade series hydropower station pipeline valve linkage and adjustment system is characterized by: The ball valve (6) and the unit (7) are both arranged inside the plant (5).

5. According to claim 1, a water diversion type cascade series hydropower station pipeline valve linkage and adjustment system is characterized by: The pipeline after the regulating valve (17) is connected to the regulating tank (9) via an energy dissipation facility (21).

6. According to claim 1, a water diversion type cascade series hydropower station pipeline valve linkage and adjustment system is characterized by: The discharge ball valve (15) and the regulating valve (17) are both arranged inside the valve chamber (14).

7. According to claim 1, a water diversion type cascade series hydropower station pipeline valve linkage and adjustment system is characterized by: The regulating pool (9) is connected to a water diversion tunnel (11) via a lower-level water inlet (10), and a pressure regulating chamber (12) is provided on the water diversion tunnel (11).

8. A method for adjusting the linkage and joint adjustment system of pipeline valves in a water diversion cascade series hydropower station, characterized in that: The following steps are involved: Step 1: When the water level in the regulating tank (9) changes, the water level meter (20) records the water level and feeds it back to the regulating valve control system (19); Step 2: After the regulating valve control system (19) obtains the water level change information, if the water level change difference is greater than the allowable height difference, the unit ball valve (6) is opened to the maximum according to the actual water level change, wherein the regulating valve (17) should be in the maximum opening state; Step 3: The regulating valve (17) adopts a piston regulating valve, and the flow rate and opening relationship curve of the regulating valve itself is determined by the manufacturer through experiments; when the discharge ball valve is opened to the maximum, the water level of the regulating tank (9) reaches a value, and the water level meter (20) records the water level and feeds it back to the regulating valve control system (19); Step 4, the regulating valve control system (19) obtains the water level fed back by the water level meter and compares it with the original water level, and calculates the relationship between the flow rate and the opening of the regulating valve (17) and the parameters of the regulating tank to obtain the relationship between the opening of the regulating valve (17) and time that should be achieved; Step 5: After the regulating valve control system (19) calculates the opening change data, it issues a command to the regulating valve transmission device, and the regulating valve transmission device controls the regulating valve (17) according to the obtained opening change data. The change in the opening size of the regulating valve (17) will cause the flow rate to change, and finally the water level of the regulating tank is restored to a normal water level. Step 6: After the opening of the regulating valve (17) is adjusted, the opening is stabilized at a suitable value, at which the flow rate of the regulating valve (17) is consistent with the outlet flow rate; Step 7: After the regulating valve (17) is stable, the water level meter records the water level again and feeds the information back to the regulating valve control system (19); Step 8: The regulating valve control system (19) obtains the water level fed back by the water level gauge and compares it with the normal water level. If the error is within the allowable range, it indicates that the water level in the regulating tank is normal. If the water level is too high or too low, it returns to step 4 for calculation and proceeds according to steps 4 to 8 until the water level is normal.

9. The method for adjusting the linkage and joint adjustment system of pipeline valves in a water diversion cascade series hydropower station according to claim 8, characterized in that: The step 1 specifically includes: When a unit (7) fails, the water level of the regulating tank (9) will drop because the outflow of water is greater than the inflow. A plurality of water level gauges (20) are arranged around the regulating tank (9). The water level gauges (20) record water level data at regular time intervals. The water level data is transmitted to the regulating valve control system (19) via a third signal line (22). The step 2 specifically includes: The regulating valve control system (19) obtains the water level data transmitted by the water level meter, comprehensively analyzes the data of multiple water level meters (20), calculates the average value and compares it with the normal water level data; if the error is within the control range, no response is made; if the recorded water level is lower than the normal water level and the difference is greater than the controllable error, the regulating valve control system (19) is adjusted according to its state: if the discharge ball valve (15) is in the ball valve closed state, the regulating valve control system (19) issues a valve opening instruction to the discharge ball valve (15) and transmits it to the ball valve motor through the data line; if the discharge ball valve (15) is in the fully open state, an adjustment instruction is issued to the motor of the regulating valve (17), and at the same time, the regulating valve control system will no longer compare the water level information fed back by the water level meter with the normal water level until the regulating valve feeds back the information.

10. The method for adjusting the linkage and joint adjustment system of pipeline valves in a water diversion cascade series hydropower station according to claim 9, characterized in that: The step 3 specifically includes: The water inlet flow valve is divided into two parts. First, the water flows through the discharge ball valve (15). The discharge ball valve (15) only determines whether the water flows through. Its opening has only two options: 0 and 1. After passing through the discharge ball valve (15), the water flows through the regulating valve (17). The regulating valve (17) adopts a piston valve. The relationship between the flow and opening curve of the valve is provided by the manufacturer. The provided data is divided into two forms: the first type, the flow-opening relationship can be expressed by one or more existing mathematical functions. , where Q represents the flow rate, N represents the number of functions, and A represents the opening, then the function relationship can be directly input into the computer to record it; the second type can only get a flow-opening curve relationship, and there is no specific one or more functions to describe the function. Then the opening is divided into M parts from 0 to 1 in an average way of differentiation. There are M+1 opening values ​​in the opening from 0 to 1. The larger M is, the more accurate the calculation is. After the opening is divided into M parts, the flow corresponding to the M+1 opening values ​​is recorded in the computer in a one-to-one correspondence according to the flow opening curve; The regulating valve (17) is at the maximum opening when the regulating valve control system (19) is not started. When the regulating valve control system (19) issues an instruction to start the discharge ball valve (15) to determine the machine, the discharge ball valve (15) begins to open at the maximum rate. When the opening of the discharge ball valve (15) is 1, its motor feeds back a value to the regulating valve control system (19).

11. The method for adjusting the linkage and joint adjustment system of pipeline valves in a water diversion cascade series hydropower station according to claim 9, characterized in that: The step 4 specifically includes: After the regulating valve control system obtains the feedback information from the ball valve motor, it turns off the ball valve motor and feeds back the shutdown information to the regulating valve control system. At the same time, the regulating valve control system starts the water level information comparison process again, compares the real-time feedback water level of the water level meter with the normal water level of the regulating tank, and calculates based on the actual water level and the target water level. The opening of the regulating valve is controlled by the motor, which has the property of uniform rotation. The relationship between the opening and time is provided by the manufacturer and is expressed by the function g(x). The specific calculation process is as follows: (1) If the actual water level is lower than the normal water level: Let the normal flow be Q0, the corresponding normal opening be A0, the normal water level be 0, the actual water level be H, if the water level is lower than the normal water level, H is a negative number, otherwise it is a positive number, the bottom area of ​​the regulating pool is S, then calculate the amount of water W required to reach the normal water level: ； Calculate the cumulative water volume W1 in the regulating tank when the opening of the regulating valve (17) is adjusted from the maximum opening to the normal opening A0: ； Where, M0 and T0 represent the opening position and corresponding time point stored in the computer at normal opening; M and T represent the maximum opening storage position and corresponding time; A i and t i Indicates the opening and time of a certain position; Q 进 , Q 出 are the flow rate entering the regulating pool and the flow rate flowing out of the regulating pool respectively; Δt is the unit time, which is determined according to the accuracy; Calculate the cumulative water volume W1 in the regulating tank when the opening of the regulating valve (17) is adjusted from the maximum to the normal opening A0. The regulating valve control system compares W1 with W and issues instructions in the following three cases: ① If W1 = W, the analysis system issues an instruction to make the regulating valve motor adjust the opening of the regulating valve (17) from the maximum to A0; ② If W1 < W, the analysis system performs the following calculations: ； Where: T1 is the duration of the regulating valve at the maximum opening, Q 进max is the inlet flow rate when the opening is maximum. The regulating valve control system issues an instruction to make the regulating valve motor start after a time T1 and adjust the regulating valve to the normal opening; ③ If W1 > W, the following recalculations are required: ； Comparison of Control Valve Control Systems and ; In the first case, if , then calculate as follows: ； Where: T x is the motor rotation stop time, T x >0; Find T x The above equation needs to be solved. The binary method is used to solve the above equation, that is, first calculate The accumulated water volume to T0 is Compare, if greater than , then calculate The accumulated water volume to T0, and vice versa The accumulated water volume to T0; and so on, until T x ; The control valve control system issues a command to make the control valve motor rotate T x Then rotate in the opposite direction to return to the normal opening position; In the second case, if , then calculate according to the following formula: ； Where: Indicates the time it takes for the valve to open to the minimum; The control valve control system issues a command to make the control valve motor adjust the valve opening to the minimum and then continue time, and then return to normal opening; (2) According to the actual water level being higher than the normal water level: When the regulating valve control system obtains that the actual water level is higher than the normal water level, it directly issues an instruction to make the regulating valve motor adjust the opening of the regulating valve to the normal opening. At the same time, the water level gauge records the water level h2 again and feeds it back to the regulating valve control system. Calculate the surplus water volume in the regulating tank as W3 = Sh2. At this time, it returns to the state of ③ in (1), and W3 is W1 - W. Calculate and issue instructions according to the above steps.

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