Electric valve flow control system and method for main shaft sealing pressure difference feedback

Abstract

The invention discloses an electric valve flow control system and method for main shaft sealing pressure difference feedback. The system comprises a pressure difference sensor installed at a main shaft sealing position of a hydroelectric generating set. The electric valve is arranged on a fluid transmission pipeline of the hydroelectric generation system; the processing unit is used for receiving the pressure difference signal transmitted by the pressure difference sensor and comparing the pressure difference signal with a preset pressure difference range; the executing mechanism is used for receiving the control instruction of the processing unit and driving the electric valve to execute the corresponding opening degree adjusting action; the differential pressure sensor is electrically connected with the processing unit, and the processing unit and the electric valve are electrically connected with the executing mechanism. Accurate flow control is achieved through real-time monitoring and automatic adjustment, the operation efficiency and stability of the hydroelectric generating set are improved, resource waste and environmental pollution are reduced, and remarkable economic benefits and social benefits are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of hydropower generation control, and relates to an electric valve flow control system and method with spindle seal pressure difference feedback. Background Art

[0002] In a hydropower generation system, maintaining the pressure difference stability at the main shaft seal of a hydropower generator set is crucial to ensure the safe operation and efficiency of the unit. Traditional flow control methods, such as adding throttle holes or manually adjusting the valve opening, are difficult to respond to system changes in real time according to preset pressure difference parameters, resulting in large pressure difference fluctuations and inaccurate flow control. This not only wastes water resources, but may also affect the stability and life of the unit.

[0003] The control valve of the main shaft seal water supply pipeline is generally in the fully open state. This operation mode causes the water supply flow rate to far exceed its design range, often several times the design flow rate. This excessive flow rate has a significant adverse effect on the water supply hose, accelerating its wear and aging process, thereby shortening the service life of the hose. More seriously, when the flow rate is too large to a certain extent, it may also cause the branch pipe to break, making the main shaft seal unable to play a normal sealing role or causing the main shaft seal to throw water, affecting the normal operation of the unit. The control electric or manual valves of the main shaft seal water supply pipeline are all in the fully open or fully closed state, and the flow rate cannot be dynamically adjusted according to the real-time pressure difference. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an electric valve flow control system and method with main shaft seal pressure difference feedback, which can realize precise flow control through real-time monitoring and automatic adjustment, improve the operating efficiency and stability of the hydropower generating set, reduce resource waste and environmental pollution, and have significant economic and social benefits.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an electric valve flow control system with main shaft seal differential pressure feedback, which includes a differential pressure sensor installed at the main shaft seal of a hydroelectric generator set; an electric valve installed on a fluid transmission pipeline of a hydroelectric power generation system; a processing unit that receives the differential pressure signal transmitted by the differential pressure sensor and compares it with a preset differential pressure range; an actuator that receives a control instruction from the processing unit and drives the electric valve to perform a corresponding opening adjustment action; the differential pressure sensor is electrically connected to the processing unit, and the processing unit and the electric valve are electrically connected to the actuator.

[0006] The differential pressure sensor monitors the differential pressure at the main shaft seal of the hydropower generator set in real time and transmits the data to the processing unit; after receiving the differential pressure data, the processing unit compares it with the preset differential pressure range. If the current differential pressure exceeds the preset range, the opening value that needs to be adjusted for the electric valve is calculated based on the intelligent algorithm.

[0007] The processing unit sends a control instruction to the actuator according to the calculation result; after receiving the control instruction, the actuator drives the electric valve to perform the opening adjustment action to change the fluid flow entering the hydropower generator set.

[0008] The intelligent algorithm of the electric valve flow control system with spindle seal pressure differential feedback as above includes the following steps: S1, algorithm input, real-time differential pressure data from the differential pressure sensor, reflecting the current differential pressure state at the main shaft seal of the hydropower generator set; preset upper and lower limit parameters of the differential pressure, used to determine whether the current differential pressure is within the normal range; S2, algorithm processing, S2-1, data receiving, receiving the differential pressure data from the differential pressure sensor in real time; S2-2, data verification, verify the received data to ensure the accuracy and completeness of the data; S2-3, data filtering, uses filtering algorithms to process raw data to eliminate noise and interference and improve data reliability; S2-4, pressure difference comparison and judgment, comparing the real-time pressure difference data with the preset pressure difference parameters to determine whether the current pressure difference exceeds the normal range; S2-5, state identification, based on the comparison results, identifying whether the current system state is normal, whether the pressure difference is too high or too low; S3, valve opening calculation, S3-1, intelligent algorithm, according to the current system status and real-time pressure difference data, use intelligent algorithm PID control, fuzzy control or neural network control to calculate the opening value that the electric valve needs to adjust; S3-2, PID control, through the adjustment of three parameters: proportional P, integral I, differential D, the system can quickly and accurately reach the preset pressure difference range; S3-3, fuzzy control, uses fuzzy logic to deal with uncertainty and nonlinear problems, and outputs the corresponding valve opening adjustment according to the preset fuzzy rule table; S3-4, neural network control, by training the neural network model, it can automatically adjust the valve opening according to the input data to adapt to the complex and changeable hydropower generation environment; the input data includes real-time pressure difference and historical pressure difference; S3-4, optimization strategy, considers the dynamic characteristics and environmental factors of the system, optimizes the algorithm, and improves control accuracy and response speed; dynamic characteristics and environmental factors include water temperature and water flow rate.

[0009] The flow control method of the electric valve flow control system with spindle seal pressure difference feedback as above comprises the following steps: SA1, initialize the system, set the monitoring parameters of the differential pressure sensor, the initial opening of the electric valve and the preset differential pressure range; SA2, real-time monitoring and recording of differential pressure data at the main shaft seal of the hydropower generator set; SA3, compare the monitored pressure difference data with the preset pressure difference range to determine whether the current pressure difference is in a stable state; SA4, based on the comparison results, uses intelligent algorithms to calculate the opening value that the electric valve needs to adjust, and sends control instructions to the actuator; SA5, the actuator drives the electric valve to perform the opening adjustment action to change the fluid flow entering the hydropower generator unit until the pressure difference at the main shaft seal returns to the preset range; SA6, continuously monitors and adjusts to keep the differential pressure at the main shaft seal stable within the design range, ensuring the normal operation of the hydropower generating unit and the energy-saving and emission-reduction effects.

[0010] The main beneficial effects of the present invention are: Accurate flow control is achieved by real-time monitoring of the pressure difference at the main shaft seal and automatically adjusting the opening of the electric valve according to the preset pressure difference parameters.

[0011] The system and method improve the operating efficiency and stability of the hydroelectric generating set, reduce the waste of water resources, and achieve the purpose of energy conservation and emission reduction.

[0012] At the same time, the system also reduces the cost and difficulty of manual intervention, improves the level of automation, and has significant economic and social benefits.

[0013] The intelligent algorithm is the core part of the spindle seal pressure differential feedback electric valve flow control system. It is responsible for automatically adjusting the opening of the electric valve based on the real-time monitored pressure differential data through a series of calculations and analyses to achieve precise flow control. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0016] like Figure 1In the invention, an electric valve flow control system with main shaft seal pressure differential feedback comprises a pressure differential sensor installed at the main shaft seal of a hydroelectric generator set; an electric valve installed on a fluid transmission pipeline of a hydroelectric power generation system; a processing unit for receiving a pressure differential signal transmitted by the pressure differential sensor and comparing it with a preset pressure differential range; an actuator for receiving a control instruction of the processing unit and driving the electric valve to perform a corresponding opening adjustment action; the pressure differential sensor is electrically connected to the processing unit, and the processing unit and the electric valve are electrically connected to the actuator.

[0017] Preferably, the electric valve automatically adjusts its opening according to the control instruction sent by the processing unit, thereby changing the fluid flow entering the hydroelectric generator set and achieving precise control of the pressure difference at the main shaft seal.

[0018] Preferably, when the actuator drives the electric valve to perform the corresponding opening adjustment action, the accuracy and timeliness of the action are ensured.

[0019] Preferably, the intelligent algorithm should have a certain degree of adaptive capability and be able to automatically adjust parameters under different working conditions to adapt to complex and changing environments.

[0020] In the preferred solution, the pressure difference sensor monitors the pressure difference at the main shaft seal of the hydropower generator set in real time and transmits the data to the processing unit; after receiving the pressure difference data, the processing unit compares it with the preset pressure difference range. If the current pressure difference exceeds the preset range, the opening value that needs to be adjusted for the electric valve is calculated according to the intelligent algorithm.

[0021] Preferably, the differential pressure sensor is used to monitor and record the differential pressure data at the main shaft seal of the hydroelectric generator set in real time to ensure the accuracy and real-time nature of the data.

[0022] In a preferred solution, the processing unit sends a control instruction to the actuator according to the calculation result; after receiving the control instruction, the actuator drives the electric valve to perform an opening adjustment action to change the fluid flow entering the hydroelectric generator set.

[0023] Preferably, the processing unit uses an intelligent algorithm to calculate the opening value of the electric valve that needs to be adjusted based on the comparison result, and sends a control instruction to the actuator.

[0024] In a preferred solution, the intelligent algorithm of the electric valve flow control system with spindle seal pressure difference feedback as described above comprises the following steps: S1, algorithm input, real-time differential pressure data from the differential pressure sensor, reflecting the current differential pressure state at the main shaft seal of the hydropower generator set; preset upper and lower limit parameters of the differential pressure, used to determine whether the current differential pressure is within the normal range; S2, algorithm processing, S2-1, data receiving, receiving the differential pressure data from the differential pressure sensor in real time; S2-2, data verification, verify the received data to ensure the accuracy and completeness of the data; S2-3, data filtering, uses filtering algorithms to process raw data to eliminate noise and interference and improve data reliability; S2-4, pressure difference comparison and judgment, comparing the real-time pressure difference data with the preset pressure difference parameters to determine whether the current pressure difference exceeds the normal range; S2-5, state identification, based on the comparison results, identifying whether the current system state is normal, whether the pressure difference is too high or too low; S3, valve opening calculation, S3-1, intelligent algorithm, according to the current system status and real-time pressure difference data, use intelligent algorithm PID control, fuzzy control or neural network control to calculate the opening value that the electric valve needs to adjust; S3-2, PID control, through the adjustment of three parameters: proportional P, integral I, differential D, the system can quickly and accurately reach the preset pressure difference range; S3-3, fuzzy control, uses fuzzy logic to deal with uncertainty and nonlinear problems, and outputs the corresponding valve opening adjustment according to the preset fuzzy rule table; S3-4, neural network control, by training the neural network model, it can automatically adjust the valve opening according to the input data to adapt to the complex and changeable hydropower generation environment; the input data includes real-time pressure difference and historical pressure difference; S3-4, optimization strategy, considers the dynamic characteristics and environmental factors of the system, optimizes the algorithm, and improves control accuracy and response speed; dynamic characteristics and environmental factors include water temperature and water flow rate.

[0025] The above method is the core part of the spindle seal pressure differential feedback electric valve flow control system. It is responsible for automatically adjusting the opening of the electric valve through a series of calculations and analyses based on the real-time monitored pressure differential data to achieve precise flow control.

[0026] The flow control method of the electric valve flow control system with spindle seal pressure difference feedback as described above comprises the following steps: SA1, initialize the system, set the monitoring parameters of the differential pressure sensor, the initial opening of the electric valve and the preset differential pressure range; SA2, real-time monitoring and recording of differential pressure data at the main shaft seal of the hydropower generator set; SA3, compare the monitored pressure difference data with the preset pressure difference range to determine whether the current pressure difference is in a stable state; SA4, based on the comparison results, uses intelligent algorithms to calculate the opening value that the electric valve needs to adjust, and sends control instructions to the actuator; SA5, the actuator drives the electric valve to perform the opening adjustment action to change the fluid flow entering the hydropower generator unit until the pressure difference at the main shaft seal returns to the preset range; SA6, continuously monitors and adjusts to keep the differential pressure at the main shaft seal stable within the design range, ensuring the normal operation of the hydropower generating unit and the energy-saving and emission-reduction effects.

[0027] The above method realizes precise flow control by real-time monitoring of the pressure difference at the main shaft seal and automatically adjusting the opening of the electric valve according to the preset pressure difference parameters.

[0028] The system and method improve the operating efficiency and stability of the hydroelectric generating set, reduce the waste of water resources, and achieve the purpose of energy conservation and emission reduction.

[0029] At the same time, the system also reduces the cost and difficulty of manual intervention, improves the level of automation, and has significant economic and social benefits.

[0030] The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An electric valve flow control system with spindle seal pressure differential feedback, characterized by: It includes a differential pressure sensor installed at the main shaft seal of the hydroelectric generator set; An electric valve installed on a fluid transmission pipeline of a hydroelectric power generation system; a processing unit that receives a pressure difference signal transmitted by a pressure difference sensor and compares it with a preset pressure difference range; an actuator that receives a control instruction from the processing unit and drives the electric valve to perform a corresponding opening adjustment action; the pressure difference sensor is electrically connected to the processing unit, and the processing unit and the electric valve are electrically connected to the actuator.

2. The electric valve flow control system with spindle seal pressure difference feedback according to claim 1 is characterized in that: The pressure difference sensor monitors the pressure difference at the main shaft seal of the hydroelectric generator set in real time and transmits the data to the processing unit; After receiving the pressure difference data, the processing unit compares it with the preset pressure difference range. If the current pressure difference exceeds the preset range, the opening value that needs to be adjusted for the electric valve is calculated based on the intelligent algorithm.

3. The electric valve flow control system with spindle seal pressure difference feedback according to claim 1 is characterized in that: The processing unit sends a control instruction to the actuator according to the calculation result; after receiving the control instruction, the actuator drives the electric valve to perform an opening adjustment action to change the fluid flow entering the hydroelectric generator set.

4. The intelligent algorithm of the electric valve flow control system with spindle seal pressure difference feedback according to any one of claims 1 to 3 is characterized in that: The steps include: S1, algorithm input, real-time differential pressure data from the differential pressure sensor, reflecting the current differential pressure state at the main shaft seal of the hydropower generator set; preset upper and lower limit parameters of the differential pressure, used to determine whether the current differential pressure is within the normal range; S2, algorithm processing, S2-1, data receiving, receiving the differential pressure data from the differential pressure sensor in real time; S2-2, data verification, verify the received data to ensure the accuracy and completeness of the data; S2-3, data filtering, uses filtering algorithms to process raw data to eliminate noise and interference and improve data reliability; S2-4, pressure difference comparison and judgment, comparing the real-time pressure difference data with the preset pressure difference parameters to determine whether the current pressure difference exceeds the normal range; S2-5, state identification, based on the comparison results, identifying whether the current system state is normal, whether the pressure difference is too high or too low; S3, valve opening calculation, S3-1, intelligent algorithm, according to the current system status and real-time pressure difference data, use intelligent algorithm PID control, fuzzy control or neural network control to calculate the opening value that the electric valve needs to adjust; S3-2, PID control, through the adjustment of three parameters: proportional P, integral I, differential D, the system can quickly and accurately reach the preset pressure difference range; S3-3, fuzzy control, uses fuzzy logic to deal with uncertainty and nonlinear problems, and outputs the corresponding valve opening adjustment according to the preset fuzzy rule table; S3-4, neural network control, by training the neural network model, it can automatically adjust the valve opening according to the input data to adapt to the complex and changeable hydropower generation environment; the input data includes real-time pressure difference and historical pressure difference; S3-4, optimization strategy, considers the dynamic characteristics and environmental factors of the system, optimizes the algorithm, and improves control accuracy and response speed; dynamic characteristics and environmental factors include water temperature and water flow rate.

5. The flow control method of the electric valve flow control system with spindle seal pressure difference feedback according to any one of claims 1 to 3, characterized in that: The steps include: SA1, initialize the system, set the monitoring parameters of the differential pressure sensor, the initial opening of the electric valve and the preset differential pressure range; SA2, real-time monitoring and recording of differential pressure data at the main shaft seal of the hydropower generator set; SA3, compare the monitored pressure difference data with the preset pressure difference range to determine whether the current pressure difference is in a stable state; SA4, based on the comparison results, uses intelligent algorithms to calculate the opening value that the electric valve needs to adjust, and sends control instructions to the actuator; SA5, the actuator drives the electric valve to perform the opening adjustment action to change the fluid flow entering the hydropower generator unit until the pressure difference at the main shaft seal returns to the preset range; SA6, continuously monitors and adjusts to keep the differential pressure at the main shaft seal stable within the design range, ensuring the normal operation of the hydropower generating unit and the energy-saving and emission-reduction effects.

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