100MW steam turbine generator stator winding inserting method

Abstract

The invention belongs to the technical field of stator windings, and discloses a 100MW turbonator stator winding inserting method, which comprises the following steps: S1, a pre-preparation stage; s2, a disassembly preparation stage; s3, a stator winding dismounting stage; s4, performing subsequent inspection and maintenance; the pre-preparation stage comprises shutdown and electrical isolation, environment preparation and tool and equipment preparation. Good external conditions and reliable equipment support are provided for dismounting work, the stability and suitability of the dismounting environment are ensured through temperature and humidity control, and the influence of environment change on the winding performance is reduced; a working area is thoroughly cleaned, so that potential pollution sources are eliminated, the smooth operation of the dismounting work, the use of a special dismounting tool and the inspection of the sharpness of a cutter are guaranteed, the surface of the winding is prevented from being scratched, and the completeness of the winding is protected; and the use of the insulation detector ensures that the insulation performance of the winding is good before the winding is disassembled, and provides a powerful guarantee for subsequent reinstallation.

Description

Technical Field

[0001] The invention belongs to the technical field of stator windings, and in particular relates to a method for winding off a stator winding of a 100MW steam turbine generator. Background Art

[0002] Stator winding removal is a key step in steam turbine generator maintenance, which usually needs to be completed safely, accurately and efficiently. However, the conventional stator winding removal method still has certain problems. For example, although shutting down and cutting off the power supply is a standard safety measure, in actual operation, some operators may ignore the relevant safety isolation requirements, especially in some old units or equipment. The electrical isolation measures are incomplete or unclear, which may lead to electrical accidents. If the special tools are not used correctly during the disassembly process, or the traction force is not properly controlled, it is easy to cause winding damage, especially for aging or fragile windings, which may cause the winding coil to break, fall off or damage the insulation material.

[0003] At the same time, when using traction tools, if the equipment is improperly selected (such as excessive or insufficient pulling force), it may cause local damage to the winding. Excessive pulling force may cause damage to the winding insulation layer, and excessive pulling force may cause the offline process to be slow and difficult. If the protective material at the end of the stator winding is not completely removed, it may affect the reinstallation process of the winding. At the same time, if the stator slots are not thoroughly cleaned during the offline process, residual debris, oil stains, iron filings, etc. may cause secondary damage to the stator winding and even affect the insulation of the winding during reinstallation. Summary of the invention

[0004] The object of the present invention is to provide a method for removing stator windings of a 100MW steam turbine generator to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention provides the following technical solution: a 100MW steam turbine generator stator winding offline method, comprising the following steps:

[0006] S1: Pre-preparation stage;

[0007] S2: Disassembly preparation stage;

[0008] S3: stator winding disassembly stage;

[0009] S4: Subsequent inspection and maintenance;

[0010] The pre-preparation stage includes shutdown and electrical isolation, environmental preparation, tool and equipment preparation; the disassembly preparation stage includes winding marking and inspection, winding disassembly tool preparation, and safety facility inspection; the stator winding disassembly stage includes dismantling sequence, traction disassembly, and winding offline; the subsequent inspection and maintenance includes stator winding inspection and stator slot cleaning.

[0011] As a further technical solution of the present invention, the shutdown and electrical inspection include shutdown operation and electrical isolation. The shutdown operation includes closing the main circuit breaker of the steam turbine generator and ensuring that the generator is disconnected from the power grid, closing all related control systems, confirming that the generator stops running, using a circuit breaker operating tool to ensure that the circuit breaker is operated without resistance and moves smoothly, and using a voltage tester to confirm that the generator is completely disconnected from the power grid and the voltage drops to zero. The electrical isolation includes completely isolating the terminal of the stator winding of the generator from the external power supply, using an isolating switch to disconnect the current loop, and using a grounding device to ground the cable, using a grounding rod and an isolating switch to ensure electrical isolation of the winding, and using an ammeter to ensure that no current flows in the isolation circuit, and the grounding resistance value should be no greater than 1Ω.

[0012] As a further technical solution of the present invention, the environmental preparation includes temperature and humidity control and work area cleaning. The temperature and humidity control includes confirming the temperature and humidity of the working environment, ensuring that the indoor temperature is between 20°C and 30°C, and the humidity is controlled between 40% and 60%, and using a digital thermometer and hygrometer EXTECH 445706 to measure and adjust the environmental conditions. The work area cleaning includes cleaning the work area, removing ground debris, metal chips, and oil stains, and using an industrial vacuum cleaner to clean up debris around and below the work area.

[0013] As a further technical solution of the present invention, the tools and equipment prepared include an electric traction machine, a hoist and a bracket, and an insulation tester. The electric traction machine includes preparing and checking the electric traction machine to ensure that it can provide the required traction force and run smoothly and without faults, and using the electric traction machine to connect to the winding traction point. The hoist and the bracket include checking the strength and stability of the hoist and the bracket to ensure that the stator winding can be safely lifted, and using high-strength steel slings and adjustment brackets. The insulation tester uses a digital insulation tester to perform a winding insulation resistance test, and performs an insulation check on the stator winding before disassembly to ensure that the winding resistance value is higher than the standard value.

[0014] As a further technical solution of the present invention, the winding marking and inspection includes marking the winding and insulation layer inspection. The marking of the winding includes using a high-temperature resistant marking pen to mark the number or position on the stator winding terminal to ensure that the disassembled winding can be reinstalled correctly. The insulation layer inspection includes using a Fluke1555 insulation tester to perform a preliminary insulation resistance test on the winding to ensure that the insulation performance of the winding is qualified and the resistance value is not less than 100MΩ.

[0015] As a further technical solution of the present invention, the winding disassembly tool preparation includes preparing a special winding disassembly tool, checking the sharpness of the tool to ensure that the winding surface will not be scratched, using a polyester woven traction belt, checking the condition of the traction belt to ensure that the traction belt is not worn or broken, and ensuring sufficient tension, and the safety facility inspection includes checking the operator's safety equipment, laying anti-slip mats in the disassembly area, ensuring that the ground is free of oil or moisture, and reducing injuries caused by the operator's slipping.

[0016] As a further technical solution of the present invention, the disassembly sequence includes using a torque wrench to loosen the terminal, ensuring that the torque of each disassembly does not exceed 30 Nm, using a polyester traction belt to connect with the U-shaped hook, ensuring that the connection point does not slip, connecting the traction belt to the traction point of the winding, ensuring a firm connection, avoiding damage to the winding due to unstable traction, and gradually disassembling the winding of each stator slot in a "top-down" order to avoid excessive tension causing winding breakage.

[0017] As a further technical solution of the present invention, the traction and disassembly includes starting the electric traction machine, setting the traction force to 2000N, setting the traction speed to 1m / min, slowly pulling the winding to ensure smooth disassembly, and stopping to check the traction belt tension every 1 meter of traction to ensure that there is no abnormality. If a jam occurs during the disassembly process, the process should be paused and checked, and the operation should be continued after the jam problem is eliminated.

[0018] As a further technical solution of the present invention, the winding offline includes using high-strength slings and pulleys to ensure that the winding is stably and smoothly lifted and moved. After disassembly, the stator winding is carefully lifted and moved to a designated storage area to ensure that the winding is not damaged.

[0019] As a further technical solution of the present invention, the stator winding inspection includes checking whether the disassembled winding is damaged or worn, performing a comprehensive insulation resistance test, using a Fluke1555 insulation tester to inspect the winding to ensure that the resistance value is greater than 100MΩ, and using a pneumatic cleaner to thoroughly remove dirt and metal chips inside the stator slot to ensure that the slot is clean and free of impurities.

[0020] The beneficial effects of the present invention are as follows:

[0021] (1) The present invention ensures the safety of the generator before disassembly through strict shutdown and electrical isolation measures. The shutdown operation not only includes turning off the main circuit breaker and related control systems, but also uses a voltage tester and an ammeter to double-confirm the electrical isolation state. The control of the grounding resistance value reduces the safety hazards to a minimum. These measures effectively avoid the occurrence of electrical accidents and ensure the life safety of operators. At the same time, the refinement of environmental preparation and tool and equipment preparation, such as temperature and humidity control, work area cleaning, and the preparation of special disassembly tools and insulation testers, provides good external conditions and reliable equipment support for the disassembly work. Temperature and humidity control ensures the stability and suitability of the disassembly environment and reduces the impact of environmental changes on winding performance; thorough cleaning of the work area eliminates potential pollution sources and ensures the smooth progress of the disassembly work. The use of special disassembly tools and the inspection of the sharpness of the tool avoid scratches on the winding surface and protect the integrity of the winding; the use of the insulation tester ensures that the insulation performance of the winding is good before disassembly, providing a strong guarantee for subsequent reinstallation.

[0022] (2) The present invention ensures that the winding can be accurately reinstalled after disassembly through the implementation of winding marking and inspection, avoiding performance degradation or failure caused by installation errors. At the same time, the insulation layer inspection further ensures the insulation performance of the winding before disassembly, effectively preventing the occurrence of electrical failures. In terms of the disassembly sequence, the present invention adopts a "top-down" step-by-step disassembly method to avoid damage to the winding caused by excessive tension and ensure the smooth progress of the disassembly process. During the traction and disassembly process, by setting a reasonable traction force and speed, and pausing for inspection after each traction distance, the safety and reliability of the disassembly process are further improved. When the winding is offline, the use of high-strength slings and pulleys ensures that the winding is stably and smoothly lifted and moved, avoiding winding damage caused by improper operation. After disassembly, a comprehensive inspection and cleaning of the stator winding and stator slots not only ensures the safety and integrity of the winding during storage, but also provides strong support for the subsequent reinstallation of the winding and the stable operation of the generator. These measures jointly improve the quality and efficiency of the disassembly work and reduce the maintenance cost and downtime caused by winding damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the overall system block diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of the process of the preparatory stage of the present invention;

[0025] Figure 3 It is a schematic diagram of the process of the disassembly preparation stage of the present invention;

[0026] Figure 4It is a schematic diagram of the process of the stator winding disassembly structure of the present invention;

[0027] Figure 5 It is a flowchart of the subsequent inspection and maintenance of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figures 1 to 5 As shown, in an embodiment of the present invention, a method for removing stator windings of a 100MW steam turbine generator comprises the following steps:

[0030] S1: Pre-preparation stage;

[0031] S2: Disassembly preparation stage;

[0032] S3: stator winding disassembly stage;

[0033] S4: Subsequent inspection and maintenance;

[0034] The pre-preparation stage includes shutdown and electrical isolation, environmental preparation, tool and equipment preparation. The disassembly preparation stage includes winding marking and inspection, winding disassembly tool preparation, and safety facility inspection. The stator winding disassembly stage includes dismantling sequence, traction disassembly, and winding offline. Subsequent inspection and maintenance include stator winding inspection and stator slot cleaning.

[0035] The integrity of the generator components was ensured during the disassembly process, avoiding damage caused by improper operation; through strict pre-preparation and disassembly preparation stages, work efficiency was improved and unnecessary downtime was reduced; meticulous operation during the stator winding disassembly stage ensured that the winding could be removed from the line smoothly and without damage; subsequent detailed inspections and maintenance provided a solid guarantee for the re-operation of the generator, extended the service life of the equipment, and improved the overall safety and stability of operation.

[0036] Among them, shutdown and electrical inspection include shutdown operation and electrical isolation. The shutdown operation includes turning off the main circuit breaker of the steam turbine generator and ensuring that the generator is disconnected from the power grid, turning off all related control systems, confirming that the generator stops running, using circuit breaker operating tools to ensure that there is no resistance and the operation is smooth, and using a voltage tester to confirm that the generator is completely disconnected from the power grid and the voltage drops to zero. Electrical isolation includes completely isolating the terminal blocks of the generator stator winding from the external power supply, using an isolating switch to disconnect the current loop, and using a grounding device to ground the cable. Use grounding rods and isolating switches to ensure that the windings are electrically isolated, and use an ammeter to ensure that no current flows in the isolation circuit. The grounding resistance value should be no greater than 1Ω.

[0037] The safe shutdown of the generator before disassembly is ensured, avoiding grid fluctuations or equipment damage caused by misoperation. The electrical isolation measures effectively cut off the connection between the generator and the external power supply, preventing accidental current flow and ensuring the safety of the disassembly personnel. At the same time, the grounding treatment reduces the risk of static electricity and lightning strikes, ensuring the safety and reliability of the entire disassembly process. These measures together provide a solid guarantee for the efficient and lossless disassembly of the stator winding, improving overall work efficiency and safety.

[0038] Among them, environmental preparation includes temperature and humidity control and work area cleaning. Temperature and humidity control includes confirming the temperature and humidity of the working environment, ensuring that the indoor temperature is between 20℃ and 30℃, and the humidity is controlled between 40% and 60%. Use the digital thermometer and hygrometer EXTECH 445706 to measure and adjust environmental conditions. Work area cleaning includes cleaning the work area, removing ground debris, metal chips, and oil stains, and using an industrial vacuum cleaner to clean up debris around and under the work area.

[0039] By precisely controlling the temperature and humidity of the working environment, not only the comfort and efficiency of the disassembly work are ensured, but also the performance degradation or damage of the equipment caused by environmental changes is avoided. At the same time, thorough cleaning of the working area eliminates potential debris and pollution sources, ensures the smooth progress of the disassembly work, and reduces errors or accidents caused by interference from impurities. These measures jointly improve the overall quality of the stator winding disassembly work and ensure the safety and reliability of the disassembly process.

[0040] Among them, the preparation of tools and equipment includes electric traction machine, hoisting equipment and bracket, insulation tester. The electric traction machine includes preparing and checking the electric traction machine to ensure that it can provide the required traction force and run smoothly and without faults, and use the electric traction machine to connect to the winding traction point. The hoisting equipment and bracket include checking the strength and stability of the hoisting equipment and bracket to ensure that the stator winding can be safely lifted, and use high-strength steel slings and adjustment brackets. The insulation tester uses a digital insulation tester to perform winding insulation resistance test, and performs insulation inspection on the stator winding before disassembly to ensure that the winding resistance value is higher than the standard value.

[0041] The smooth progress of the dismantling work was ensured by carefully preparing the electric traction machine, hoisting equipment, bracket and insulation tester. The electric traction machine provided stable traction force, the hoisting equipment and bracket ensured the safe lifting of the winding, and the insulation tester ensured that the insulation performance of the winding was good before dismantling. These measures jointly improved the efficiency and safety of the dismantling work and avoided accidents and losses caused by equipment failure or poor performance.

[0042] Among them, winding marking and inspection include marking winding and insulation layer inspection. Winding marking includes using a high-temperature resistant marking pen to mark the number or position on the stator winding terminal to ensure that the disassembled winding can be reinstalled correctly. Insulation layer inspection includes using a Fluke1555 insulation tester to perform a preliminary insulation resistance test on the winding to ensure that the insulation performance of the winding is qualified and the resistance value is not less than 100MΩ.

[0043] By carefully marking the windings, it is ensured that the windings can be reinstalled accurately after removal, avoiding performance degradation or failures caused by installation errors. At the same time, the insulation layer inspection ensures that the insulation performance of the windings is good before removal, effectively preventing electrical failures caused by poor insulation. These measures have jointly improved the accuracy and safety of the disassembly work, provided a strong guarantee for the stable operation of the generator, and reduced the subsequent maintenance costs and risks.

[0044] Among them, the preparation of winding disassembly tools includes preparing special winding disassembly tools, checking the sharpness of the tool to ensure that it will not scratch the winding surface, using polyester woven traction belts, checking the condition of the traction belts, ensuring that the traction belts are not worn or broken, and ensuring sufficient pulling force. The safety facility inspection includes checking the safety equipment of the operators, laying anti-slip mats in the disassembly area, ensuring that the ground is free of oil or moisture, and reducing injuries caused by operator slips.

[0045] The use of special tools and the inspection of the sharpness of the tools avoid scratches on the surface of the windings and protect the integrity of the windings. The inspection of the polyester braided traction belt ensures the stability and safety of the traction process. At the same time, the inspection of safety facilities, such as the safety equipment of the operators and the laying of anti-slip mats, effectively reduces the safety risks during the operation and ensures the safety of the personnel. These measures together improve the quality and efficiency of the disassembly work.

[0046] The disassembly sequence includes using a torque wrench to loosen the terminal block, ensuring that the torque for each disassembly does not exceed 30 Nm, using a polyester traction belt to connect with the U-shaped hook to ensure that the connection point does not slip, connecting the traction belt to the traction point of the winding to ensure a firm connection to avoid damage to the winding due to unstable traction, and gradually disassembling the winding of each stator slot in a "top-down" order to avoid excessive tension causing winding breakage.

[0047] The use of a torque wrench ensures safe loosening of the terminal blocks, avoiding damage caused by excessive torque. The firm connection of the polyester traction belt and the U-hook, as well as the gradual disassembly in a "top-down" order, effectively protects the winding from damage by excessive tension and prevents the risk of winding breakage. These measures not only improve the safety and accuracy of the disassembly work, but also ensure the integrity of the winding during the disassembly process.

[0048] Among them, traction and disassembly include starting the electric traction machine, setting the traction force to 2000N, setting the traction speed to 1m / min, slowly pulling the winding to ensure smooth disassembly, and stopping to check the traction belt tension every 1 meter to ensure that there is no abnormality. If a jam occurs during the disassembly process, pause and check, and continue the operation after eliminating the jam problem.

[0049] By setting reasonable traction force and speed, the disassembly process is ensured to proceed smoothly, and winding damage caused by excessive traction force or too fast speed is effectively avoided. The pause inspection after each traction distance, as well as the timely pause and inspection when encountering jams, further improve the safety and reliability of the disassembly process. These measures jointly ensure the integrity of the winding during the disassembly process and reduce the risk of accidental damage.

[0050] Among them, the winding offline process includes the use of high-strength slings and pulleys to ensure that the winding is lifted and moved stably and smoothly. After disassembly, the stator winding is carefully lifted and moved to the designated storage area to ensure that the winding is not damaged.

[0051] By using high-strength lifting belts and pulleys, the winding can be stably and smoothly lifted and moved, avoiding damage to the winding caused by improper operation. After disassembly, the winding is carefully lifted and moved to the designated storage area to ensure the safety and integrity of the winding during storage. These measures not only improve the efficiency of the disassembly work, but also provide strong guarantees for the subsequent reinstallation of the winding and the stable operation of the generator, reducing the maintenance cost and downtime caused by winding damage.

[0052] Among them, the stator winding inspection includes checking whether the disassembled winding is damaged or worn, conducting a comprehensive insulation resistance test, using a Fluke1555 insulation tester to check the winding to ensure that the resistance value is greater than 100MΩ, and using a pneumatic cleaner to thoroughly remove dirt and metal chips inside the stator slot to ensure that the slot is clean and free of impurities.

[0053] By carefully inspecting the disassembled windings, potential damage or wear is discovered and dealt with in a timely manner, ensuring the reliability and service life of the windings. Comprehensive insulation resistance testing ensures good insulation performance of the windings and prevents the occurrence of electrical failures. The use of pneumatic cleaners thoroughly removes dirt and metal chips in the stator slots, providing a clean environment for the reinstallation of the windings. These measures together improve the overall performance of the generator, reduce the failure rate, and ensure the efficient and stable operation of the generator.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for removing stator windings from a 100MW steam turbine generator, characterized in that: The following steps are involved: S1: Pre-preparation stage; S2: Disassembly preparation stage; S3: stator winding disassembly stage; S4: Subsequent inspection and maintenance; The pre-preparation stage includes shutdown and electrical isolation, environmental preparation, tool and equipment preparation; the disassembly preparation stage includes winding marking and inspection, winding disassembly tool preparation, and safety facility inspection; the stator winding disassembly stage includes dismantling sequence, traction disassembly, and winding offline; the subsequent inspection and maintenance includes stator winding inspection and stator slot cleaning.

2. A 100MW steam turbine generator stator winding offline method according to claim 1, characterized in that: The shutdown and electrical inspection include shutdown operation and electrical isolation. The shutdown operation includes closing the main circuit breaker of the steam turbine generator and ensuring that the generator is disconnected from the power grid, shutting down all related control systems, confirming that the generator stops running, using a circuit breaker operating tool to ensure that the circuit breaker is operated without resistance and moves smoothly, and using a voltage tester to confirm that the generator is completely disconnected from the power grid and the voltage drops to zero. The electrical isolation includes completely isolating the terminal of the generator stator winding from the external power supply, using an isolating switch to disconnect the current loop, and using a grounding device to ground the cable, using a grounding rod and an isolating switch to ensure that the winding is electrically isolated, and using an ammeter to ensure that no current flows in the isolation circuit. The grounding resistance value should be no greater than 1Ω.

3. A 100MW steam turbine generator stator winding offline method according to claim 1, characterized in that: The environmental preparation includes temperature and humidity control and work area cleaning. The temperature and humidity control includes confirming the temperature and humidity of the working environment, ensuring that the indoor temperature is between 20°C and 30°C, and the humidity is controlled between 40% and 60%. The digital thermometer and hygrometer EXTECH445706 is used to measure and adjust the environmental conditions. The work area cleaning includes cleaning the work area, removing ground debris, metal chips, and oil stains, and using an industrial vacuum cleaner to clean up the debris around and under the work area.

4. A 100MW steam turbine generator stator winding offline method according to claim 1, characterized in that: The tools and equipment preparation include electric traction machine, hoist and bracket, insulation tester. The electric traction machine includes preparing and checking the electric traction machine to ensure that it can provide the required traction force and run smoothly and without faults, and using the electric traction machine to connect to the winding traction point. The hoist and bracket include checking the strength and stability of the hoist and bracket to ensure that the stator winding can be safely lifted, and using high-strength steel slings and adjustment brackets. The insulation tester uses a digital insulation tester to perform winding insulation resistance testing, and performs insulation inspection on the stator winding before disassembly to ensure that the winding resistance value is higher than the standard value.

5. The method for removing stator windings of a 100MW steam turbine generator according to claim 1 is characterized in that: The winding marking and inspection includes marking the winding and insulation layer inspection. The winding marking includes using a high-temperature resistant marking pen to mark the number or position on the stator winding terminal to ensure that the disassembled winding can be reinstalled correctly. The insulation layer inspection includes using a Fluke1555 insulation tester to perform a preliminary insulation resistance test on the winding to ensure that the insulation performance of the winding is qualified and the resistance value is not less than 100MΩ.

6. A 100MW steam turbine generator stator winding offline method according to claim 1, characterized in that: The winding disassembly tool preparation includes preparing special winding disassembly tools, checking the sharpness of the tool to ensure that the winding surface will not be scratched, using a polyester woven traction belt, checking the condition of the traction belt to ensure that the traction belt is not worn or broken, and ensuring sufficient tension. The safety facility inspection includes checking the operator's safety equipment, laying anti-slip mats in the disassembly area, ensuring that the ground is free of oil or moisture, and reducing injuries caused by operator slips.

7. A 100MW steam turbine generator stator winding offline method according to claim 1, characterized in that: The disassembly sequence includes using a torque wrench to loosen the terminal, ensuring that the torque of each disassembly does not exceed 30Nm, using a polyester traction belt to connect with the U-shaped hook, ensuring that the connection point does not slip, connecting the traction belt to the traction point of the winding, ensuring a firm connection, avoiding damage to the winding due to unstable traction, and gradually disassembling the winding of each stator slot in a "top-to-bottom" order to avoid excessive tension causing winding breakage.

8. The method for removing stator windings of a 100MW steam turbine generator according to claim 1, characterized in that: The traction and disassembly include starting the electric traction machine, setting the traction force to 2000N, setting the traction speed to 1m / min, slowly pulling the winding to ensure smooth disassembly, and stopping to check the traction belt tension every 1 meter of traction to ensure that there is no abnormality. If a jam occurs during the disassembly process, pause and check, and continue the operation after eliminating the jam problem.

9. A 100MW steam turbine generator stator winding offline method according to claim 1, characterized in that: The winding unloading process includes using high-strength lifting belts and pulleys to ensure that the winding is stably and smoothly lifted and moved. After disassembly, the stator winding is carefully lifted and moved to a designated storage area to ensure that the winding is not damaged.

10. A 100MW steam turbine generator stator winding offline method according to claim 1, characterized in that: The stator winding inspection includes checking whether the disassembled winding is damaged or worn, performing a comprehensive insulation resistance test, using a Fluke1555 insulation tester to inspect the winding to ensure that the resistance value is greater than 100MΩ, and using a pneumatic cleaner to thoroughly remove dirt and metal chips inside the stator slot to ensure that the slot is clean and free of impurities.

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