Experimental platform for thermal fault simulation and diagnosis of generator

Abstract

The utility model relates to the technical field of generators, and discloses a generator thermal fault simulation and diagnosis experiment platform, a water circulation system comprises a stainless steel bucket, a valve, a water pump and a water pipe, a flow control system comprises a flow meter, a flow valve and a water pipe, and a heating temperature control system comprises a temperature sensor and a heating belt. The water pipe comprises a metal hose, a stainless steel pipe and a stainless steel header pipe, a stainless steel connector and a flowmeter are arranged at the two ends of the metal hose respectively, the flowmeter is connected with a flow valve through a stainless steel branch connector, and the flow valve is located at one end of the stainless steel pipe. The other end of the stainless steel pipe is connected with the stainless steel bucket. The experimental platform can accurately simulate various working conditions, including temperature, water flow velocity, water flow and the like, of a large-scale generator, collects a large amount of experimental data through a sensor and monitoring equipment, covers a plurality of key parameters, simulates the thermal fault phenomenon of the generator, and diagnoses the thermal fault phenomenon.

Description

Technical Field

[0001] The utility model relates to the technical field of generators, in particular to an experimental platform for simulating and diagnosing thermal faults of generators. Background Technique

[0002] In the core field of the power industry, as a key device for electric energy conversion, the efficient and stable operation of large generators is crucial for ensuring the continuity and reliability of power supply. However, with the continuous increase in the capacity of generators and the extension of operation time, the problem of internal thermal faults has become increasingly prominent, becoming an important factor affecting the safe operation of generators.

[0003] Generator thermal faults, especially those in the stator region, often result from local overheating caused by factors such as a decline in the efficiency of the cooling system or the aging of the stator winding insulation. These thermal faults may initially manifest as abnormal local temperature rises. If not detected and addressed in a timely manner, they will quickly spread to the entire system, leading to serious equipment damage and even system shutdown. This situation will not only result in high maintenance and replacement costs but also pose a serious threat to the stable operation of the power grid, affecting the power supply to a large number of users.

[0004] Given the significant hazards of thermal faults to generators and power systems, it is particularly important to carry out research on online monitoring and diagnosis technologies for thermal faults of large generators. By building a dedicated test platform to simulate various operating conditions and fault scenarios of generators during actual operation, the occurrence mechanism, evolution law, and early warning characteristics of thermal faults can be studied in depth. In this process, the valuable experimental data accumulated not only helps to verify the effectiveness and accuracy of existing monitoring technologies but also provides strong support for the development of new monitoring and diagnosis technologies.

[0005] Currently, although some monitoring technologies have been applied to the prevention and diagnosis of generator thermal faults, such as temperature monitoring, these technologies often focus on the monitoring of single parameters and are difficult to comprehensively reflect the multi-factor coupling characteristics of generator thermal faults. Therefore, the development of an integrated monitoring system that combines multi-parameter monitoring, intelligent analysis, and early warning functions has become an important direction for future technological development.

[0006] In Document CN201921159737, a fault diagnosis and troubleshooting test bench for a wind turbine generator is disclosed, which includes a motor, coupling I, sensor I, coupling II, gearbox, coupling III, sensor II, coupling IV, magnetic powder brake, and a test platform arranged at the bottom of the above-mentioned devices in sequence from left to right. One end of the motor and the gearbox is connected through coupling I and coupling II, and the magnetic powder brake and the other end of the gearbox are connected through coupling III and coupling IV. Sensor I is arranged between coupling I and coupling II, and sensor II is arranged between coupling III and coupling IV. The motor, sensor I, gearbox, sensor II, and magnetic powder brake are fixed on the test platform through their corresponding brackets. This structure has relatively few troubleshooting situations and has quite large limitations in practical applications.

[0007] Therefore, a new technical solution is needed to solve the above technical problems. Summary of the Invention

[0008] In order to solve the above problems, the utility model discloses an experimental platform for simulating and diagnosing thermal faults of a generator. By the combined use of devices such as a high-precision flowmeter, flow valve, temperature sensor, and heating tape, the simulation and control of the motor working environment can be realized. This precise control helps to reproduce various thermal fault scenarios that the motor may encounter during actual operation under laboratory conditions, providing reliable experimental data support for fault diagnosis.

[0009] The technical solution of the utility model is: an experimental platform for simulating and diagnosing thermal faults of a generator, including a water circulation system, a process control system, a flow control system, and a temperature control and heating system connected to each other. The water circulation system includes a stainless steel water bucket, a valve, a water pump, and a water pipe. The flow control system includes a flowmeter, a flow valve, and a water pipe. The temperature control and heating system includes a temperature sensor and a heating tape. The water pipe includes a metal hose, a stainless steel pipe, and a stainless steel main pipe. Stainless steel joints and a flowmeter are respectively arranged at both ends of the metal hose. The flowmeter is connected to the flow valve through a stainless steel branch joint. The flow valve is located at one end of the stainless steel pipe. A temperature sensor and a heating tape are arranged on the stainless steel pipe. The other end of the stainless steel pipe is connected to the stainless steel water bucket through the stainless steel main pipe.

[0010] By adopting the above technical solution, the working state of the generator at different flow rates and temperatures can be simulated, and various thermal fault scenarios that the motor may encounter during actual operation can be reproduced, providing reliable experimental data support for fault diagnosis.

[0011] Preferably, the stainless steel joint is connected to the stainless steel main pipe through a tee joint, and the stainless steel main pipe is connected to the valve joint on the water pump through a stainless steel elbow.

[0012] By adopting the above technical solution, the water pump pumps water into the stainless-steel main pipe, and then the stainless-steel main pipe is respectively input to the corresponding metal hoses through three-way pipe joints for experiments.

[0013] Preferably, there are several three-way joints on the stainless-steel main pipe, and the three-way joints are connected in sequence. Each three-way joint is connected to the metal hose through a stainless-steel joint.

[0014] By adopting the above technical solution, the required number of three-way joints can be connected and set on the stainless-steel main pipe according to actual needs, and each three-way joint is connected to the metal hose through a corresponding stainless-steel joint.

[0015] Preferably, the stainless-steel branch joint is used to connect the metal hose and the stainless-steel pipe. The flow meter is located between the metal hose and the stainless-steel branch joint, and the flow valve is located between the stainless-steel branch joint and the stainless-steel pipe.

[0016] By adopting the above technical solution, the flow meter is used to detect the flow velocity of the water flowing through from the metal hose to the stainless-steel pipe, and transmits it to the flow controller, and then determines the opening degree of the flow valve according to the preset value.

[0017] Preferably, the flow meters are connected in sequence, the flow valves are connected in sequence, and both the flow meters and the flow valves are connected to the flow controller.

[0018] By adopting the above technical solution, a flow meter and a flow valve are provided between each metal hose and the stainless-steel pipe, and the water flow in each pipeline can be monitored and controlled in real time, and the conditions under different flow velocities can be simulated.

[0019] Preferably, there are more than two lengths of the stainless-steel pipes. The stainless-steel pipes are wrapped with heating tapes, and temperature sensors are respectively arranged at the water inlet end and the water outlet end of the stainless-steel pipes. The temperature sensors are located on the stainless-steel pipes not covered by the heating tapes.

[0020] By adopting the above technical solution, different lengths of stainless-steel pipes can simulate the conditions of different generator water pipes. There is a temperature sensor at each end of the stainless-steel pipe, which can detect the temperature of the water at the water inlet end of the stainless-steel pipe, and then transmit the data to the temperature controller. When the temperature does not meet the standard, the temperature sensor controls the heating tape to heat the stainless-steel pipe, so as to heat the water inside the stainless-steel pipe. The temperature sensor at the water outlet end can detect the temperature of the heated water to see if it meets the standard. If it does not meet the standard, the heating tape continues to heat. If it meets the standard, the heating stops. The state of the generator at different temperatures can be simulated.

[0021] Preferably, the temperature sensors at both ends of the stainless-steel pipe and the heating tapes are all connected to the temperature controller, the temperature controller is connected to the data processing and forwarding device, and the data processing and forwarding device is all connected to the industrial control integrated machine.

[0022] By adopting the above technical solution, through the heating conditions of the heating tapes in different pipelines, various thermal fault scenarios can be simulated, providing reliable experimental data support for fault diagnosis.

[0023] Preferably, the ends of the stainless steel pipes are sequentially connected to the stainless steel main pipe, the stainless steel main pipe is connected to the stainless steel water bucket, the stainless steel water buckets are connected through the stainless steel main pipe joints, and the stainless steel main pipe joints are connected through valves.

[0024] By adopting the above technical solution, the water flowing through the stainless steel pipes in each pipeline is all collected into the stainless steel water bucket through the stainless steel main pipe, which can enable the recycled use of the water and realize the water circulation of the whole device.

[0025] Preferably, the water pump is connected to the valve through a valve joint, and the valve is connected to the stainless steel water bucket through a stainless steel main pipe joint.

[0026] Advantages of the present utility model: 1. By the combined use of devices such as a high-precision flowmeter, flow valve, temperature sensor, and heating tape in the present utility model, the working environment of the motor, such as the flow rate and temperature of the cooling water, can be accurately simulated and controlled. This precise control helps to reproduce various thermal fault scenarios that the motor may encounter during actual operation under laboratory conditions, providing reliable experimental data support for fault diagnosis.

[0027] 2. By arranging temperature sensors at both ends of the stainless steel pipe in the present utility model, the temperatures at the inlet and outlet of the water can be clearly known, thus facilitating the control of the heating tape, facilitating the heating of the stainless steel pipe by the heating tape, and further heating the water in the stainless steel pipe.

[0028] 3. The present utility model integrates multiple subsystems such as a water circulation system, a flow control system, and a heating and temperature control system. The systems are closely coordinated through connecting parts such as stainless steel pipes and water pipes, realizing the full automation and intelligence from water circulation, flow regulation, temperature control to data acquisition, processing, and display. This modular design not only facilitates the construction and maintenance of the system but also improves the flexibility and expandability of the experiment, having profound practical significance and broad application prospects for enhancing the operation reliability of the generator and ensuring the safe and stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of the present utility model;

[0030] Figure 2 is a schematic structural diagram of each component of the present utility model;

[0031] Figure 3 is a schematic structural diagram of the control system of the present utility model;

[0032] Figure 4 This is a schematic structural diagram of the stainless steel pipe of the present utility model.

[0033] Among them: 1. Three-way joint; 2. Stainless steel main pipe; 3. Stainless steel elbow; 4. Stainless steel joint; 5. Metal hose; 6. Flowmeter; 7. Stainless steel branch joint; 8. Flow valve; 9. Temperature sensor; 10. Heating tape; 11. Stainless steel pipe; 12. Stainless steel water bucket; 13. Stainless steel main pipe joint; 14. Valve; 15. Valve joint; 16. Water pump.

[0034] 21. Flow controller; 22. Temperature controller; 23. Data processing and forwarding device; 24. Industrial control integrated machine. Specific implementation mode

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0036] As Figures 1-4 shown, an experimental platform for simulating and diagnosing thermal faults of a generator includes a water circulation system, a process control system, a flow control system, and a heating and temperature control system connected to each other. The water circulation system includes a stainless steel water bucket 12, a valve 14, a water pump 16, and a water pipe. The flow control system includes a flowmeter 6, a flow valve 8, and a water pipe. The heating and temperature control system includes a temperature sensor 9 and a heating tape 10. The water pipe includes a metal hose 5, a stainless steel pipe 11, and a stainless steel main pipe 2. Stainless steel joints 4 and a flowmeter 6 are respectively provided at both ends of the metal hose 5. The flowmeter 6 is connected to the flow valve 8 through a stainless steel branch joint 7. The flow valve 8 is located at one end of the stainless steel pipe 11. A temperature sensor 9 and a heating tape 10 are provided on the stainless steel pipe 11. The other end of the stainless steel pipe 11 is connected to the stainless steel water bucket 12 through the stainless steel main pipe 2, which can simulate the working state of the generator at different flow rates and different temperatures, reproduce various thermal fault scenarios that the motor may encounter during actual operation, and provide reliable experimental data support for fault diagnosis.

[0037] The stainless steel joint 4 is connected to the stainless steel main pipe 2 through a three-way joint 1. The stainless steel main pipe 2 is connected to the valve joint 15 on the water pump 16 through a stainless steel elbow 3. The water pump 16 pumps water into the stainless steel main pipe 2, and then the stainless steel main pipe 2 respectively inputs to the corresponding metal hoses 5 through the three-way joint 1 for experiments.

[0038] A number of three-way joints 1 are provided on the stainless steel main pipe 2. The three-way joints 1 are connected in sequence. Each three-way joint 1 is connected to the metal hose 5 through a stainless steel joint 3. The required number of three-way joints 1 can be connected and set on the stainless steel main pipe 2 according to actual needs. Each three-way joint 1 is connected to the metal hose 5 through a corresponding stainless steel joint 4.

[0039] The stainless-steel branch joint 7 is used to connect the metal hose 5 and the stainless-steel pipe 11. The flowmeter is located between the metal hose 5 and the stainless-steel branch joint 7, and the flow valve 8 is located between the stainless-steel branch joint 7 and the stainless-steel pipe 11. The flowmeter 6 is used to detect the flow velocity of the water flowing through from the metal hose 5 to the stainless-steel pipe 11, and transmit it to the flow controller 21, and then determine the opening degree of the flow valve 8 according to the preset value.

[0040] The flowmeters 6 are connected in sequence, and the flow valves 8 are connected in sequence. Both the flowmeter 6 and the flow valve 8 are connected to the flow controller 22. A flowmeter 6 and a flow valve 8 are provided between each metal hose 5 and the stainless-steel pipe 11, enabling real-time monitoring and control of the water flow in each pipeline, and can simulate the situation under different flow velocities.

[0041] There are more than two types of lengths for the stainless-steel pipes 11. The stainless-steel pipes 11 are wrapped with heating tapes 10. The temperature sensors 9 are respectively arranged at the water inlet end and the water outlet end of the stainless-steel pipes 11. The temperature sensors 9 are located on the stainless-steel pipes 11 that are not covered by the heating tapes 10. Different lengths of the stainless-steel pipes 11 can simulate the situations of different generator water pipes. There is a temperature sensor 9 at each end of the stainless-steel pipes 11, which can detect the temperature of the water at the water inlet end of the stainless-steel pipes 11, and then transmit the data to the temperature controller 22. When the temperature does not meet the standard, the temperature sensor 9 controls the heating tape to heat the stainless-steel pipes 11, thereby heating the water inside the stainless-steel pipes 11. The temperature sensor 9 at the water outlet end can detect the temperature of the heated water to see if it meets the standard. If it does not meet the standard, the heating tape continues to heat; if it meets the standard, the heating stops. It can simulate the states of generators at different temperatures.

[0042] The temperature sensors 9 at both ends of the stainless-steel pipes 11 and the heating tapes 10 are all connected to the temperature controller 22. The temperature controller 22 is connected to the data processing and forwarding device 23, and the data processing and forwarding device 23 is connected to the industrial control computer 24. Through the heating conditions of the heating tapes 10 in different pipelines, various thermal fault scenarios can be simulated, providing reliable experimental data support for fault diagnosis.

[0043] The ends of the stainless-steel pipes 11 are sequentially connected to the stainless-steel main pipe 2. The stainless-steel main pipe 2 is connected to the stainless-steel water bucket 12. The stainless-steel water buckets 12 are connected through the stainless-steel main pipe joint 13. The stainless-steel main pipe joints 13 are connected through the valve 14. The water flowing through the stainless-steel pipes 11 in each pipeline is all collected into the stainless-steel water bucket 12 through the stainless-steel main pipe 2, enabling the recycled use of the used water and realizing the water circulation of the entire device.

[0044] The water pump 16 is connected to the valve 14 through the valve joint 15. The valve 14 is connected to the stainless-steel water bucket 12 through the stainless-steel main pipe joint 13.

[0045] The flowmeter 6 detects the water flow velocity between the metal hose 5 and the stainless steel pipe 11, and is used to simulate the flow velocity of the cooling system of the generator under different scenarios. When the flow velocity under the same conditions is less than or greater than the simulation result, it is necessary to check where there is a problem with the cooling system of the generator. The temperature sensor 9 detects the water temperature at the inlet end of the stainless steel pipe 11, and then detects the water heated by the heating tape through the temperature sensor 9 at the outlet end, so as to simulate the water temperature at a certain flow velocity. If the water temperature of the cooling system of the generator is different from the simulated water temperature, a fault is detected and investigated. For stainless steel pipes 11 of different lengths, the length of the water pipes in the generator cooling system can be simulated, and the fault is compared and investigated according to the comparison between the temperature at the outlet and the temperature of the precipitation device.

[0046] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and described in the embodiments. Without departing from the said principles, the embodiments of the present invention can have any deformation or modification.

Claims

1. An experimental platform for simulation and diagnosis of thermal faults of generators, comprising a water circulation system, a process control system, a flow control system, and a heating and temperature control system connected to each other, wherein the water circulation system comprises a stainless steel bucket, a valve, a water pump and a water pipe, the flow control system comprises a flow meter, a flow valve and a water pipe, and the heating and temperature control system comprises a temperature sensor and a heating belt, characterized in that: The water pipe includes a metal hose, a stainless steel pipe and a stainless steel main pipe. Stainless steel joints and flow meters are respectively provided at both ends of the metal hose. The flow meter is connected to a flow valve through a stainless steel branch joint. The flow valve is located at one end of the stainless steel pipe. A temperature sensor and a heating belt are provided on the stainless steel pipe. The other end of the stainless steel pipe is connected to a stainless steel water bucket through a stainless steel main pipe.

2. The experimental platform for generator thermal fault simulation and diagnosis according to claim 1, characterized in that: The stainless steel joint is connected to the stainless steel main pipe through a three-way joint, and the stainless steel main pipe is connected to the valve joint on the water pump through a stainless steel elbow.

3. The experimental platform for generator thermal fault simulation and diagnosis according to claim 1, characterized in that: There are a plurality of three-way joints on the stainless steel main pipe, and the three-way joints are connected in sequence, and each three-way joint is connected through a stainless steel joint and a metal hose.

4. The experimental platform for generator thermal fault simulation and diagnosis according to claim 1, characterized in that: The stainless steel branch joint is used to connect the metal hose and the stainless steel pipe, the flow meter is located between the metal hose and the stainless steel branch joint, and the flow valve is located between the stainless steel branch joint and the stainless steel pipe.

5. The experimental platform for generator thermal fault simulation and diagnosis according to claim 1, characterized in that: The flow meters are connected in sequence, the flow valves are connected in sequence, and both the flow meters and the flow valves are connected to a flow controller.

6. The experimental platform for generator thermal fault simulation and diagnosis according to claim 1, characterized in that: The stainless steel pipe has two or more lengths, and a heating belt is wrapped on the stainless steel pipe. The temperature sensors are respectively arranged at the water inlet and water outlet of the stainless steel pipe, and the temperature sensors are located on the stainless steel pipe that is not wrapped by the heating belt.

7. The experimental platform for generator thermal fault simulation and diagnosis according to claim 5, characterized in that: The temperature sensors at both ends of the stainless steel pipe and the heating belt are connected to the temperature controller, the temperature controller is connected to the data processing transponder, and the data processing transponder is connected to the industrial control integrated machine.

8. The experimental platform for generator thermal fault simulation and diagnosis according to claim 1, characterized in that: The ends of the stainless steel pipes are connected to the stainless steel main pipe in turn, the stainless steel pipe main pipe is connected to the stainless steel bucket, the stainless steel buckets are connected through stainless steel main pipe joints, and the stainless steel main pipe joints are connected through valves.

9. The experimental platform for generator thermal fault simulation and diagnosis according to claim 2, characterized in that: The water pump is connected to the valve through a valve joint, and the valve is connected to the stainless steel water bucket through a stainless steel main pipe joint.

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