Hydraulic control system for stable operation of ocean thermal energy conversion in full working condition

Abstract

The application discloses a hydraulic control system for stable operation of an ocean temperature difference energy power generation full working condition, and belongs to the technical field of ocean temperature difference energy power generation. The hydraulic control system comprises a temperature difference energy power generation assembly and an intelligent hydraulic stability control assembly. The intelligent hydraulic stability control assembly comprises a monitoring unit, a hydraulic valve, an electric control valve and an intelligent valve control unit. The monitoring unit is used for monitoring multiple types of information data, feeding back a circulating operation working condition of a turbine device, and transmitting the monitored information data to the intelligent valve control unit. The real-time circulating operation working condition of the turbine device is compared with an optimal operation working condition to determine the opening and closing states of the electric control valve. The electric control valve is electrically connected with the intelligent valve control unit to control the opening and closing and the opening degree of the electric control valve, so as to control the flow size of each branch of the system. The electric control valve comprises an electric valve and a pneumatic tee electric ball valve. The electric control valve is connected with a hydraulic cylinder to control the flow size of the hydraulic cylinder, so that the pressure of the whole system is kept stable.

Description

Technical fields:

[0001] This invention relates to a hydraulic control system for stable operation of ocean thermal energy conversion under all operating conditions. Background technology:

[0002] Ocean thermal energy conversion (OTEC) is a type of energy generation that utilizes the thermal energy contained in the temperature difference between warm surface water and cold deep water. OTEC is a stable resource with abundant reserves, high energy density, is green and renewable, and has high comprehensive utilization value. It is the most valuable and promising resource in the ocean for development and utilization. The development and utilization of OTEC is of great significance for improving the energy structure, alleviating energy pressure, and developing island resources.

[0003] For existing ocean thermal energy conversion (OTEC) power generation systems, the circulating working fluid must be superheated to operate; otherwise, there is a risk of liquefaction, leading to turbine impeller corrosion. Overheating of the working fluid also requires the OTEC system to absorb more heat from seawater, affecting power generation efficiency. When high-pressure and low-pressure turbines operate simultaneously, the working fluid before the low-pressure turbine may liquefy after the high-pressure turbine has been operating, causing corrosion to the low-pressure turbine. Furthermore, the variable temperature and climate of the ocean cause unstable turbine efficiency, preventing the turbine from reaching its optimal operating efficiency and thus damaging the turbine equipment. Summary of the Invention:

[0004] This invention provides a hydraulic control system for stable operation of ocean thermal energy conversion (OTEC) power generation under all operating conditions. The system features a rational structural design and, based on the coordinated operation of various electrical components, real-time monitoring and comparison of data transmitted from sensors and transmitters. This allows for timely and precise adjustment of the opening and closing of corresponding valves, balancing normal operating condition control with extreme condition protection. This ensures the power generation system can maintain stable circulation over extended periods, and that the turbine equipment remains in optimal operating conditions. Furthermore, it prevents impeller corrosion caused by liquefaction of the circulating working fluid in both high-pressure and low-pressure turbines during actual operation, thereby improving the overall power generation efficiency of OTEC, preventing turbine equipment damage and motor overload, and solving problems existing in the prior art.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] A hydraulic control system for stable operation of ocean thermal energy conversion under all working conditions. The hydraulic control system includes: an ocean thermal energy conversion component and an intelligent hydraulic stabilization component. The intelligent hydraulic stabilization component is connected to the ocean thermal energy conversion component through a pneumatic three-way electric ball valve to ensure that the ocean thermal energy conversion component can generate electricity continuously and stably.

[0007] The intelligent hydraulic stability control component includes a monitoring unit, hydraulic valves, electrically controlled valves, and an intelligent valve control unit. The monitoring unit monitors various types of information data, provides feedback on the cyclic operating conditions of the turbine equipment, and transmits the monitored information data to the intelligent valve control unit. The unit compares the real-time cyclic operating conditions of the turbine equipment with the optimal operating conditions to determine the opening and closing status of the electrically controlled valves. The electrically controlled valves are electrically connected to the intelligent valve control unit, controlling their opening, closing, and degree of opening to control the flow rate of each branch of the system. The electrically controlled valves include electric valves and pneumatic three-way electric ball valves. The electrically controlled valves are connected to the hydraulic cylinders, controlling the flow rate into the hydraulic cylinders to maintain stable pressure throughout the system.

[0008] The intelligent hydraulic stability control component monitors the temperature, pressure, flow rate of steam at the inlet of the high-pressure turbine and the low-pressure turbine, as well as the liquid level changes of the working hydraulic cylinder, through a monitoring unit, an intelligent valve control unit, an electric control valve, and a check valve. It sets the corresponding information data for the high-pressure turbine and the low-pressure turbine under optimal operating conditions and compares it with the real-time information data transmitted by the monitoring unit. The intelligent valve control unit then controls the opening and closing of the valves to adjust the working pressure and flow rate at both ends of the turbine to maintain optimal operating conditions.

[0009] The monitoring unit includes a level transmitter, a temperature sensor, a pressure sensor, and a flow sensor. The temperature sensor, pressure sensor, and flow sensor monitor the temperature, pressure, and flow parameters of the steam at the inlet of the high-pressure turbine and the low-pressure turbine, respectively, and transmit them to the intelligent valve control unit. The intelligent valve control unit analyzes the operating conditions at both ends of the high-pressure turbine and the low-pressure turbine, and compares them with the optimal operating conditions of the high-pressure turbine and the low-pressure turbine, respectively. It then controls the opening and closing status, opening and closing sequence, and opening degree of two pneumatic three-way electric ball valves to achieve gas working fluid diversion, regulate the flow and pressure of the thermoelectric power generation system, and ensure that the high-pressure turbine and the low-pressure turbine operate stably under optimal conditions.

[0010] The intelligent hydraulic stability control component's level transmitter monitors the level change parameters of the two hydraulic cylinders and transmits these parameters to the intelligent valve control component. Based on the specific level requirements of the two hydraulic cylinders, it controls the opening or closing of eight electric valves to achieve cyclic operation of the two hydraulic cylinders, absorbing excess flow and pressure, and keeping the system in a stable cycle.

[0011] The intelligent valve control unit includes a host computer, a PLC control cabinet, and a frequency converter cabinet. It receives monitoring information data transmitted by the monitoring unit and compares and analyzes it with the monitoring information data corresponding to the optimal operating conditions stored in the intelligent valve control unit, thereby realizing individual control of electric valves and pneumatic three-way electric ball valves.

[0012] The real-time monitoring information acquired by the monitoring unit is transmitted to the intelligent valve control unit and compared with the monitoring information data corresponding to the high-pressure turbine and low-pressure turbine under optimal operating conditions. When the high-pressure turbine and low-pressure turbine are under optimal operating conditions, the two pneumatic three-way electric ball valves remain closed; when the high-pressure turbine and low-pressure turbine are under extreme operating conditions, the two pneumatic three-way electric ball valves are quickly opened to prevent the generator from overloading.

[0013] When the intelligent valve control unit receives a significant increase in the pressure parameter before the low-pressure turbine from the monitoring unit, there is a risk of liquefaction of the working fluid before the low-pressure turbine. At this time, the pneumatic three-way electric ball valve before the high-pressure turbine should be kept closed, and the pneumatic three-way electric ball valve before the low-pressure turbine should be quickly evacuated to prevent the working fluid from liquefying and corroding the low-pressure turbine impeller.

[0014] Two check valves are installed on the solenoid valve to prevent gas backflow when the solenoid valve is opened and closed to change the pressure, thus ensuring the continuous and stable operation of the system.

[0015] This invention employs the aforementioned structure, connecting the thermoelectric power generation component and the intelligent hydraulic stabilization component via a pneumatic three-way electric ball valve to ensure continuous and stable power generation. A monitoring unit monitors various types of data, providing feedback on the turbine's cyclic operating conditions. This data is then transmitted to the intelligent valve control unit, which compares the turbine's real-time cyclic operating conditions with the optimal operating conditions to determine the opening and closing status of the electrically controlled valve. The electrically controlled valve is electrically connected to the intelligent valve control unit, controlling its opening and closing and degree to regulate the flow rate in each branch of the system. The electrically controlled valve is also connected to the hydraulic cylinder, controlling the flow rate into the cylinder to maintain stable system pressure. If the sensor before the low-pressure turbine detects a potential risk of liquefaction in the working fluid, the pneumatic three-way electric ball valve before the low-pressure turbine is quickly opened to rapidly pump out air, preventing liquefaction and corrosion of the low-pressure turbine impeller. This design offers advantages of stability, high efficiency, safety, and practicality. Attached image description:

[0016] Figure 1 This is a system schematic diagram of the present invention.

[0017] Figure 2 This is a system schematic diagram of the intelligent hydraulic temperature control component of the present invention.

[0018] In the diagram, 1. Warm seawater pump; 2. Evaporator; 3. Gas-liquid separator; 4. High-pressure turbine; 5. Low-pressure turbine; 6. Absorber; 7. Condenser; 8. Cold seawater pump; 9. Liquid ammonia storage tank; 10. Working fluid pump; 11. Regenerator 1; 12. Regenerator 2; 13. Regenerator 3; 14. Intelligent valve control unit; 15. Hydraulic cylinder 1; 16. Hydraulic cylinder 2; 17. Hydraulic turbine; 18. Pressure sensor; 19. Temperature sensor; 20. Flow sensor; 21. Pneumatic three-way electric ball valve; 22. Check valve; 23. Pressure sensor; 24. Temperature sensor; 25. Flow sensor; 26. Pneumatic three-way electric ball valve; 27. Check valve; 28, 29, 30, 31, 32, 33, 34, 35. Electric valve; 36, 37. Level transmitter. Detailed implementation method:

[0019] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0020] like Figure 1-2 As shown, the hydraulic control system for stable operation of ocean thermal energy conversion under all working conditions includes: an ocean thermal energy conversion component and an intelligent hydraulic stabilization component. The intelligent hydraulic stabilization component is connected to the ocean thermal energy conversion component through a pneumatic three-way electric ball valve to ensure that the ocean thermal energy conversion component can generate electricity continuously and stably.

[0021] The intelligent hydraulic stability control component includes a monitoring unit, hydraulic valves, electrically controlled valves, and an intelligent valve control unit. The monitoring unit monitors various types of information data, provides feedback on the cyclic operating conditions of the turbine equipment, and transmits the monitored information data to the intelligent valve control unit. The unit compares the real-time cyclic operating conditions of the turbine equipment with the optimal operating conditions to determine the opening and closing status of the electrically controlled valves. The electrically controlled valves are electrically connected to the intelligent valve control unit, controlling their opening, closing, and degree of opening to control the flow rate of each branch of the system. The electrically controlled valves include electric valves and pneumatic three-way electric ball valves. The electrically controlled valves are connected to the hydraulic cylinders, controlling the flow rate into the hydraulic cylinders to maintain stable pressure throughout the system.

[0022] The intelligent hydraulic stability control component monitors the temperature, pressure, flow rate of steam at the inlet of the high-pressure turbine and the low-pressure turbine, as well as the liquid level changes of the working hydraulic cylinder, through a monitoring unit, an intelligent valve control unit, an electric control valve, and a check valve. It sets the corresponding information data for the high-pressure turbine and the low-pressure turbine under optimal operating conditions and compares it with the real-time information data transmitted by the monitoring unit. The intelligent valve control unit then controls the opening and closing of the valves to adjust the working pressure and flow rate at both ends of the turbine to maintain optimal operating conditions.

[0023] The monitoring unit includes a level transmitter, a temperature sensor, a pressure sensor, and a flow sensor. The temperature sensor, pressure sensor, and flow sensor monitor the temperature, pressure, and flow parameters of the steam at the inlet of the high-pressure turbine and the low-pressure turbine, respectively, and transmit them to the intelligent valve control unit. The intelligent valve control unit analyzes the operating conditions at both ends of the high-pressure turbine and the low-pressure turbine, and compares them with the optimal operating conditions of the high-pressure turbine and the low-pressure turbine, respectively. It then controls the opening and closing status, opening and closing sequence, and opening degree of two pneumatic three-way electric ball valves to achieve gas working fluid diversion, regulate the flow and pressure of the thermoelectric power generation system, and ensure that the high-pressure turbine and the low-pressure turbine operate stably under optimal conditions.

[0024] The intelligent hydraulic stability control component's level transmitter monitors the level change parameters of the two hydraulic cylinders and transmits these parameters to the intelligent valve control component. Based on the specific level requirements of the two hydraulic cylinders, it controls the opening or closing of eight electric valves to achieve cyclic operation of the two hydraulic cylinders, absorbing excess flow and pressure, and keeping the system in a stable cycle.

[0025] The intelligent valve control unit includes a host computer, a PLC control cabinet, and a frequency converter cabinet. It receives monitoring information data transmitted by the monitoring unit and compares and analyzes it with the monitoring information data corresponding to the optimal operating conditions stored in the intelligent valve control unit, thereby realizing individual control of electric valves and pneumatic three-way electric ball valves.

[0026] The real-time monitoring information acquired by the monitoring unit is transmitted to the intelligent valve control unit and compared with the monitoring information data corresponding to the high-pressure turbine and low-pressure turbine under optimal operating conditions. When the high-pressure turbine and low-pressure turbine are under optimal operating conditions, the two pneumatic three-way electric ball valves remain closed; when the high-pressure turbine and low-pressure turbine are under extreme operating conditions, the two pneumatic three-way electric ball valves are quickly opened to prevent the generator from overloading.

[0027] When the intelligent valve control unit receives a significant increase in the pressure parameter before the low-pressure turbine from the monitoring unit, there is a risk of liquefaction of the working fluid before the low-pressure turbine. At this time, the pneumatic three-way electric ball valve before the high-pressure turbine should be kept closed, and the pneumatic three-way electric ball valve before the low-pressure turbine should be quickly evacuated to prevent the working fluid from liquefying and corroding the low-pressure turbine impeller.

[0028] Two check valves are installed on the solenoid valve to prevent gas backflow when the solenoid valve is opened and closed to change the pressure, thus ensuring the continuous and stable operation of the system.

[0029] The working principle of the hydraulic control system for stable operation of ocean thermal energy conversion (OTEC) power generation under all operating conditions in this embodiment of the invention is as follows: Based on the interaction of multiple types of electrical components, through real-time monitoring and comparison of data transmitted by sensors and transmitters, the opening and closing of corresponding valves can be adjusted in a timely and accurate manner, taking into account both normal operating condition control and extreme operating condition protection, maintaining the power generation system in stable circulation for a long time, and ensuring that the turbine equipment is always in optimal operating condition. This prevents impeller corrosion caused by liquefaction of the circulating working fluid in the high-pressure and low-pressure turbines during actual operation, improves the overall power generation efficiency of OTEC power generation, and avoids damage to turbine equipment and motor overload.

[0030] Due to the complex and variable nature of ocean temperature and climate, it is difficult to ensure that turbines operate at high efficiency and stability. Therefore, existing control systems cannot meet the needs of practical applications, resulting in low conversion and utilization rates of ocean thermal energy.

[0031] To address the problems existing in the prior art, the hydraulic control system in this application can maintain a stable cycle and operate under optimal conditions while avoiding impeller corrosion. Specifically, it mainly includes a thermoelectric power generation component and an intelligent hydraulic control component. The intelligent hydraulic control component is connected to the thermoelectric power generation component via a pneumatic three-way electric ball valve to ensure continuous and stable power generation. The intelligent hydraulic control component includes a monitoring unit, hydraulic valves, electrically controlled valves, and an intelligent valve control unit. The monitoring unit monitors various types of information data, provides feedback on the cyclic operating conditions of the turbine equipment, and transmits the monitored information data to the intelligent valve control unit. The unit compares the real-time cyclic operating conditions of the turbine equipment with the optimal operating conditions to determine the opening and closing status of the electrically controlled valves. The electrically controlled valves are electrically connected to the intelligent valve control unit, controlling their opening and closing and degree of opening to control the flow rate of each branch of the system. The electrically controlled valves include electric valves and pneumatic three-way electric ball valves. The electrically controlled valves are connected to the hydraulic cylinders to control the flow rate into the hydraulic cylinders, keeping the overall system pressure stable.

[0032] In actual use, the warm seawater pump 1 pumps the surface warm seawater into the evaporator 2. The surface warm seawater in the evaporator 2 heats the mixed working fluid into a gas-liquid two-phase mixed working fluid. The gas-liquid two-phase mixed working fluid is separated into ammonia gas and lean ammonia solution in the gas-liquid separator 3. The ammonia gas is regulated to a stable flow rate by the pneumatic three-way electric ball valve 21 and then enters the high-pressure turbine 4 to do work. The lean ammonia solution enters the heat recovery branch, passes through the regenerator 11, and drives the turbine 14 to do work. Part of the exhaust gas after the ammonia gas has done work in the high-pressure turbine 4 is extracted and enters the exhaust heat recovery branch. At the same time, it enters the pressure energy utilization system and drives the turbine 17 to do work through the hydraulic cylinder 16. The remaining exhaust gas enters the low-pressure turbine 5 to do work.

[0033] In absorber 6, the working fluid from the two heat recovery branches mixes with the exhaust gas discharged from low-pressure turbine 5 and enters condenser 7. Deep cold seawater cools the mixed working fluid into a liquid state, and then the working fluid is pumped by working fluid pump 10 to the regenerator 13 of the heat recovery branch for preheating, and then enters evaporator 2 to enter the next cycle.

[0034] Furthermore, the high-pressure ammonia gas from the gas-liquid separator 3 passes through sensors 18, 19, and 20. The sensors transmit the monitored signals to the intelligent valve control unit 14. If the monitored flow rate and pressure transmitted by the sensors are higher than the optimal operating conditions of the high-pressure turbine stored in the intelligent valve control unit 14, the pneumatic three-way electric ball valve 21 will open. The opening degree of the pneumatic three-way electric ball valve 21 will be adjusted according to the actual operating conditions to make the high-pressure turbine work under the optimal operating conditions.

[0035] If the pneumatic three-way electric ball valve 21 is opened, some ammonia gas enters the hydraulic system through the one-way valve 22. The other part of the ammonia gas coming out of the pneumatic three-way electric ball valve 21 performs work through the high-pressure turbine 4 and passes through sensors 23, 24, and 25. The sensors transmit the monitored signals to the intelligent valve control unit 14. If the monitored flow rate and pressure transmitted by the sensors are higher than the optimal operating conditions of the low-pressure turbine stored in the intelligent valve control unit 14, the pneumatic three-way electric ball valve 26 is opened, and the opening degree of the pneumatic three-way electric ball valve 26 is adjusted according to the actual operating conditions to make the low-pressure turbine work under the optimal operating conditions. If the pneumatic three-way electric ball valve 26 is opened, some ammonia gas enters the hydraulic stabilization system through the one-way valve 27. The ammonia gas passing through the one-way valves 22 and 27 mixes in the pipeline and then enters the hydraulic system.

[0036] After the gas enters the hydraulic system, the intelligent valve control unit 14 opens the electric valves 31, 35, 32, and 28, and the ammonia gas flows into the hydraulic cylinder 16, where it pushes the transmission fluid downward. The hydraulic fluid does work through the turbine 17 to consume excess pressure in the system and ensure stable operation of the system.

[0037] When the level transmitter 36 monitors the fluid in the hydraulic cylinder 15 and it reaches a certain level, it transmits the monitoring signal to the intelligent valve control unit 14. Electric valves 31, 35, 32, and 28 close, while electric valves 29, 34, 33, and 30 open. Ammonia gas flows into the hydraulic cylinder 15, pushing the fluid downwards. The hydraulic fluid then performs work through the turbine 17.

[0038] When the level transmitter 37 detects that the liquid in the hydraulic cylinder 16 has reached a certain level, it transmits the monitoring signal to the intelligent valve control unit 14, and the electric valves 29, 34, 33, and 30 close, while the electric valves 31, 35, 32, and 28 open. At this time, the system repeats the above process.

[0039] During operation, the actual working conditions can be divided into several scenarios: If the data transmitted by sensors 18, 19, 20, 23, 24, and 25 in the intelligent valve control unit 14 are compared and it is found that the high-pressure turbine 4 and the low-pressure turbine 5 are working under optimal conditions, then the two pneumatic three-way electric ball valves 21 and 26 remain closed.

[0040] If the data transmitted by sensors 18, 19, 20, 23, 24, and 25 in the intelligent valve control unit are compared in the intelligent valve control unit 14 and it is found that turbines 4 and 5 are operating within the working range, then according to the comparison of the optimal operating conditions stored in the intelligent valve control unit 14, the air extraction ratio is adjusted by changing the opening of the two pneumatic three-way ball valves 21 and 26, so that the high-pressure turbine 4 and the low-pressure turbine 5 can work stably under the optimal operating conditions.

[0041] Preferably, the intelligent hydraulic stability control component monitors the temperature, pressure, flow rate of steam at the inlet of the high-pressure turbine and the low-pressure turbine, as well as the liquid level changes of the working hydraulic cylinder, through a monitoring unit, an intelligent valve control unit, an electric control valve, and a check valve. It sets the corresponding information data for the high-pressure turbine and the low-pressure turbine under optimal operating conditions, compares it with the real-time information data transmitted by the monitoring unit, and controls the opening and closing of the valves through the intelligent valve control unit, thereby adjusting the working pressure and flow rate at both ends of the turbine to maintain it under optimal operating conditions.

[0042] The monitoring unit includes a level transmitter, a temperature sensor, a pressure sensor, and a flow sensor. The temperature sensor, pressure sensor, and flow sensor monitor the temperature, pressure, and flow parameters of the steam at the inlet of the high-pressure turbine and the low-pressure turbine, respectively, and transmit them to the intelligent valve control unit. The intelligent valve control unit analyzes the operating conditions at both ends of the high-pressure turbine and the low-pressure turbine, and compares them with the optimal operating conditions of the high-pressure turbine and the low-pressure turbine, respectively. It then controls the opening and closing status, opening and closing sequence, and opening degree of two pneumatic three-way electric ball valves to achieve gas working fluid diversion, regulate the flow and pressure of the thermoelectric power generation system, and ensure that the high-pressure turbine and the low-pressure turbine operate stably under optimal conditions.

[0043] The level transmitter monitors the level change parameters of the two hydraulic cylinders and transmits the level change parameters to the intelligent valve control component. Based on the specific level requirements of the two hydraulic cylinders, it controls the opening or closing of eight electric valves to realize the cyclic operation of the two hydraulic cylinders, absorb excess flow and pressure, and keep the system in a stable cycle.

[0044] The real-time monitoring information acquired by the monitoring unit is transmitted to the intelligent valve control unit and compared with the monitoring information data corresponding to the high-pressure turbine and low-pressure turbine under optimal operating conditions. When the high-pressure turbine and low-pressure turbine are under optimal operating conditions, the two pneumatic three-way electric ball valves remain closed; when the high-pressure turbine and low-pressure turbine are under extreme operating conditions, the two pneumatic three-way electric ball valves are quickly opened to prevent the generator from overloading.

[0045] It should be noted that if the pressure monitored by the pressure sensor 25 before the low-pressure turbine 5 is significantly increased in the intelligent valve control unit 14, there may be a risk of liquefaction of the working fluid before the low-pressure turbine 5. Therefore, the pneumatic three-way electric ball valve 21 before the high-pressure turbine 4 should be kept closed, while the pneumatic three-way electric ball valve 26 before the low-pressure turbine 5 should be quickly evacuated to prevent the working fluid from liquefying and corroding the impeller of the low-pressure turbine 5.

[0046] In summary, the hydraulic control system for stable operation of ocean thermal energy conversion (OTEC) power generation under all operating conditions in this embodiment of the invention is based on the coordinated action of multiple types of electrical components. Through real-time monitoring and comparison of data transmitted by sensors and transmitters, it can promptly and accurately adjust the opening and closing of corresponding valves and their degrees of opening, taking into account both normal operating condition control and extreme operating condition protection. This ensures that the power generation system can maintain stable circulation for a long time, and that the turbine equipment is always in optimal operating condition. This prevents impeller corrosion caused by liquefaction of the circulating working fluid in both high-pressure and low-pressure turbines during actual operation, thereby improving the overall power generation efficiency of OTEC and avoiding damage to turbine equipment and motor overload.

[0047] The above specific embodiments should not be construed as limiting the scope of protection of the present invention. For those skilled in the art, any alternative improvements or modifications made to the embodiments of the present invention shall fall within the scope of protection of the present invention.

[0048] Any aspects of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A hydraulic control system for stable operation under all operating conditions in ocean thermal energy conversion power generation, characterized in that: The hydraulic control system includes a thermoelectric power generation component and an intelligent hydraulic stabilization component. The intelligent hydraulic stabilization component is connected to the thermoelectric power generation component through a pneumatic three-way electric ball valve to ensure that the thermoelectric power generation component can generate electricity continuously and stably. The intelligent hydraulic stability control component includes a monitoring unit, hydraulic valves, electrically controlled valves, and an intelligent valve control unit. The monitoring unit monitors various types of information data, provides feedback on the cyclic operating conditions of the turbine equipment, and transmits the monitored information data to the intelligent valve control unit. The unit compares the real-time cyclic operating conditions of the turbine equipment with the optimal operating conditions to determine the opening and closing status of the electrically controlled valves. The electrically controlled valves are electrically connected to the intelligent valve control unit, controlling their opening, closing, and degree of opening to control the flow rate of each branch of the system. The electrically controlled valves include electric valves and pneumatic three-way electric ball valves. The electrically controlled valves are connected to the hydraulic cylinders, controlling the flow rate into the hydraulic cylinders to maintain stable pressure throughout the system. The monitoring unit includes a level transmitter, a temperature sensor, a pressure sensor, and a flow sensor. The temperature sensor, pressure sensor, and flow sensor monitor the temperature, pressure, and flow parameters of the steam at the inlet of the high-pressure turbine and the low-pressure turbine, respectively, and transmit them to the intelligent valve control unit. The intelligent valve control unit analyzes the operating conditions at both ends of the high-pressure turbine and the low-pressure turbine, and compares them with the optimal operating conditions of the high-pressure turbine and the low-pressure turbine, respectively. It controls the opening and closing status, opening and closing sequence, and opening degree of two pneumatic three-way electric ball valves to achieve gas working fluid diversion, regulate the flow and pressure of the thermoelectric power generation system, and enable the high-pressure turbine and the low-pressure turbine to operate stably under the optimal operating conditions. The level transmitter of the intelligent hydraulic stability control component monitors the level change parameters of the two hydraulic cylinders and transmits the level change parameters to the intelligent valve control component. According to the specific level requirements of the two hydraulic cylinders, it controls the opening or closing of eight electric valves to realize the cyclic operation of the two hydraulic cylinders, absorb excess flow and pressure, and keep the system in a stable cycle. The real-time monitoring information acquired by the monitoring unit is transmitted to the intelligent valve control unit and compared with the monitoring information data corresponding to the high-pressure turbine and low-pressure turbine under optimal operating conditions. When the high-pressure turbine and low-pressure turbine are under optimal operating conditions, the two pneumatic three-way electric ball valves remain closed; when the high-pressure turbine and low-pressure turbine are under extreme operating conditions, the two pneumatic three-way electric ball valves are quickly opened to prevent generator overload. The hydraulic valve includes a check valve; two pneumatic three-way electric ball valves are respectively installed at the high-pressure turbine inlet and between the high-pressure turbine and the low-pressure turbine, and the other outlets of the two pneumatic three-way electric ball valves are respectively connected to the same heat exchanger through check valves and then enter the intelligent hydraulic stability control component.

2. The hydraulic control system for stable operation under all operating conditions of ocean thermal energy conversion as described in claim 1, characterized in that: The intelligent hydraulic stability control component monitors the temperature, pressure, flow rate of steam at the inlet of the high-pressure turbine and the low-pressure turbine, as well as the liquid level changes of the working hydraulic cylinder, through a monitoring unit, an intelligent valve control unit, an electric control valve, and a check valve. It sets the corresponding information data for the high-pressure turbine and the low-pressure turbine under optimal operating conditions and compares it with the real-time information data transmitted by the monitoring unit. The intelligent valve control unit then controls the opening and closing of the valves to adjust the working pressure and flow rate at both ends of the turbine to maintain optimal operating conditions.

3. The hydraulic control system for stable operation under all operating conditions of ocean thermal energy conversion as described in claim 1, characterized in that: The intelligent valve control unit includes a host computer, a PLC control cabinet, and a frequency converter cabinet. It receives monitoring information data transmitted by the monitoring unit and compares and analyzes it with the monitoring information data corresponding to the optimal operating conditions stored in the intelligent valve control unit, thereby realizing individual control of electric valves and pneumatic three-way electric ball valves.

4. The hydraulic control system for stable operation under all operating conditions of ocean thermal energy conversion as described in claim 3, characterized in that: When the intelligent valve control unit receives a significant increase in the pressure parameter before the low-pressure turbine from the monitoring unit, there is a risk of liquefaction of the working fluid before the low-pressure turbine. At this time, the pneumatic three-way electric ball valve before the high-pressure turbine should be kept closed, and the pneumatic three-way electric ball valve before the low-pressure turbine should be quickly evacuated to prevent the working fluid from liquefying and corroding the low-pressure turbine impeller.

5. The hydraulic control system for stable operation under all operating conditions of ocean thermal energy conversion as described in claim 1, characterized in that: Two check valves are installed on the solenoid valve to prevent gas backflow when the solenoid valve is opened and closed to change the pressure, thus ensuring the continuous and stable operation of the system.

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