Chuangyou QFSN-600-2 Hydrogen Hydrogen 600MW Turbine Generator

2 The manufacturer installed the company's design institute power plant research institute and other units sincere cooperation, work together, unite the machine, so far the generator is in good condition, no failure. Its smooth operation has marked a new milestone in the design and manufacturing capabilities of Shanghai power station equipment.

As the Shanghai Turbine Generator Co., Ltd., which is responsible for the 600MW steam turbine generator set of the main equipment of the project, it has been cultivating the technology from the optimization design to the scientific verification process to the elaborate manufacturing, from the in-plant test to the on-site installation. The hard work of the workers and the workers. Its successful trial production has made important contributions to China's electric power industry and the development of the national economy.

Shanghai Turbine Generator Co., Ltd. actively carried out the work of equipment excellence and standardization in the trial production process, plastic products, creating famous brands throughout the design and manufacturing process of the 600MW generator set. This will not only be successful for the first stage, but also lay a solid foundation for the company to provide the same high-quality machine products to the power sector in the future.

Type 2 Hydrogen Hydrogen 600 Turbine Generator is Haiqiu Steam Turbine Co., Ltd. Based on the design of the Westinghouse 60051 Turbine Generator Evaluation Unit, combined with the design experience of our company's products, the manufacturing process characteristics and a lot of scientific research work. Innovative design of new products. The purpose is to optimize the main technical and economic indicators under the premise of ensuring reliability. Improve the maximum continuous output of the generator; improve the efficiency of the generator; increase the forced excitation top voltage multiplier and the excitation growth rate to reach the international advanced level to meet the needs of domestic and foreign markets.

Through the actual operation test of the Wusongtai unit, it is proved that the generator has the advantages of well-designed advanced structure, reasonable performance, stable operation and high reliability. It has high comprehensive economic and technical performance, the maximum continuous output is up to 68, the elbow evaluation generator efficiency is up to 98.94 and the strong excitation multiple is more than 2 times, etc., which meets and exceeds the requirements of the original hydropower department for the introduction of the unit. Moreover, the localization rate of this type of generator reaches 85 or more, and the product quality and price are low, reaching the international advanced level. This type of product has been contracted to include 2 Jiaxing Power Plants, 2 Taishan Power Plants, 2 sets of Dingqu Power Plant, Liaocheng Power Plant.

The design optimization requirements proposed by the generator, that is, the maximum continuous output with the turbine is greater than 650 MW, the generator efficiency is trial-produced 988, the excitation excitation top value is greater than 2 times, and the excitation growth response speed is greater than 2.

Adopting the calculation method of imported technology, following the mature structure of imported technology, the imported technology 60 and the original design of the product are targeted and optimized. The optimization plan is considered by Westinghouse experts and domestic experts.

Optimized design The rated hydrogen pressure at rated conditions is set at 4 MPa. The reduction of rated hydrogen pressure is beneficial to reduce wind friction loss and improve generator efficiency. It will also contribute to hydrogen leakage when the sealing structure is unchanged. cut back.

The design is considered for 40 years of generator life. During the life cycle, it suffered 10,000 shutdowns and the forced shutdown rate was less than 600. The optimized design of the generator was optimized on the basis of the introduction of the technical evaluation unit of the West Company. Its characteristic capacity meets the maximum output requirement matching with the turbine of 6001 Jia Nuclear Power Plant, while the maximum temperature of the rotor is reduced, and the efficiency of the generator is increased by more than 98.9.

Compared with the introduction of Westinghouse's 600-inch generator, its main size, the rotor diameter is increased from 1092 to 30. On the basis of ensuring the mechanical strength, the rotor copper area is increased, the copper content of the rotor is increased, and the copper consumption of the rotor is reduced to improve the efficiency. .

Compared with the introduction of Westinghouse Technology Pingyi Power Plant 6001, the main improvement of the optimized design has increased the maximum continuous output. The rated capacity is 6001 Jia, the maximum continuous output can reach 680 cubits.

Increased efficiency of the generator. From the Pingyi Power Plant assessment unit generator 98.67 to 98.94.

The excitation top voltage and the excitation growth speed are increased. The excitation top voltage is 2. times times that of the Pingyi Power Plant evaluation unit. Improve the dynamic performance of the excitation system control system.

Simplify structure and manufacturing process. It is arranged at the two ends of the steam excitation, each fan has only 29 moving blades and 20 static guiding vane single-stage fans to replace the original 5th moving blades of the Pingyi power plant evaluation unit. There are 530 moving blades and 968 stationary blades. .

The rotor replaces the semi-opening groove of the original evaluation unit with an open slot, which simplifies the variety of milling cutters and reduces the processing time, and reduces the variety specifications of the rotor copper wire.

Improve operational reliability. The hydrogen pressure of the motor is reduced, and the running hydrogen pressure is reduced from 0.51 MPa to 0.4 MPa.

Improve the number of low cycle fatigue of the rotor. The design is calculated according to the requirements of 10,000 times of starting and stopping, which meets the requirements of the peaking operation of the class.

The improved rotor damping structure improves the negative sequence capability of the negative sequence and the transient negative sequence capability reaches 122 with a reasonably advanced structure. The magnetic pole lead adopts the advanced tongue-shaped fixing structure of our factory to replace the radial screw fixing structure of Westinghouse; the anti-aging air gap partition is selected, and the distribution of the wind passages of the stator and rotor is more reasonable; the current of the shielded light structure is adopted. The transformer is easy to install and reduce the vibration of the outlet box. The new rotor slot wedge structure reduces the wind consumption. The double-layer insulation is used on the bearing seat seal to make the bearing ground insulation can be measured at any time during the whole use of the generator. situation.

Convenient transportation 3 set the maximum transport width from the assessment unit 4.5 to 4 overall stator transport weight does not exceed 32, 1. For remote land transport, the development of the segment base, the maximum transport weight of the stator does not exceed 26,1 = Shanghai steamship Generator Co., Ltd. Shanghai Electric Machinery Factory 圩6, Jia's different structure and China's power grid analysis and verification of generators. In combination with Shanghai's scientific research combined with the production of key industrial conferences and the Ministry of Machinery's nine localization research, a total of more than 20 scientific research projects have been completed, several of which directly guide the design of construction paper for steam turbine generators in Shanghai Optimization 600. Some have been tested and verified, and the main items are as follows:

the study.

Research on strength and vibration of 600MW generator horizontal cooler and base.

Optimized design of the hydrogen cooler for the 6001 Jia turbine generator.

Dynamic simulation study on the interaction between large motor and large power grid.

End field electric field and anti-halation research calculation.

The stator of the 6001 steam turbine generator is studied with internal and external bases.

2 rotor coil hurricane drilling oblique hole and deburring technology, this is a 600 turbine generator using air gap to take the air ventilation technology, the rotor coil is inclined vent hole structure, because the vent hole in the entire 7 long The accuracy of the hole spacing between the two requires an island of ±0.7, and the number of the whole set is 70,000 holes. Therefore, the processing of the coil is performed from all sides of the equipment tool and the tool is finally tested to ensure that the design sample has various dimensions of the inclined hole. The roughness requirement eliminates the burrs caused by machining, effectively prevents the occurrence of short circuit between the turns of the coil, and ensures the manufacturing quality of the rotor coil.

3 rotor groove wedge machining research Because the rotor adopts the air gap to take the ventilation method, the air inlet hole of the rotor is designed to be abutting the oblique waist hole, and the smooth transition is required, and the air outlet hole is a diagonal waist hole. Compared with the previous slot wedge ventilation structure, it is quite difficult to increase, and the workload is large. Through the adjustment of the processing technology to improve the fixtures and other aspects to take a series of measures, and finally explore the processing technology of 6001 rotor wedge and its processing points.

46001ç–‹ stator coil assembly is the key process in the whole manufacturing process. In this process, the end interlayer support tube filling resin is the key technology in the assembly, and the technical requirements are high, the difficulty is reflected in the resin. The vacuum state is filled and effective and does not leak and cannot be reworked.

Such a project is not listed, it laid the foundation for the success of our 600MW generator.

Carrying out all-round quality control, carefully manufacturing the company to participate in the quality commitment meeting of the plastics brand created by the Shanghai Economic Commission and Shanghai Electric Group Co., Ltd., and the quality of life is the education of all the staff. According to the process of measuring the key parts of the generator by 60051, 38 working groups were established, and the quality commitment signing activities of the grade-level relegation were carried out extensively, which made the products of 600 liters deep and popular, because the posts were taken seriously in the whole process of production. Quality Commitment, so far, in the 600MW generator manufacturing process, through the total quality control, the user participated in 27 monitoring and verification points, and established a complete manufacturing record and inspection record for all key processes, detailing the quality of the manufacturing process. The situation, signed by the operator and the inspector, forms a product file.

2 elaborately manufactured.

In the 600 manufacturing process, all employees adhered to the quality of the careful operation and careful processing, strictly in accordance with the inspection, so that the critical process inspection in the manufacturing process, such as the stator core iron loss test stator airtight test stator coil air flow test AC and DC resistance Pressure test Hydrostatic test potential Extrapolation test The inter-turn test of the rotor The withstand voltage test Impedance balance test The lead gas tightness test is passed uniformly.

3 Grasp the quality of the key components.

The product quality of the accessory kit is also the key to the quality of the company's products. For this reason, our company carefully selects qualified manufacturers to carry out the matching, and actively cooperates with the owner of Wujing Power Plant for supervision and acceptance. The main supporting equipment is hydrogen oil water system and subcontracting. The manufacturer also established a large-scale on-site quality assurance project for 24 items. The hydrogen cooler outlet bushing current transformer and other external parts are jointly accepted by the owners to participate in the acceptance of domestic and foreign manufacturers' products.

After the above equipment was put into our company, the final assembly test was carried out to reorganize the paint and then leave the factory.

VI. Conclusion The QFSN600MW turbine generator designed and manufactured by Shanghai Turbine Generator Co., Ltd. has been tested in the manufacturing plant and the installation and operation of Wujing Power Plant. The generator has excellent performance, high efficiency, low temperature rise of various components, various parameters and design. The value is close, the amount of hydrogen leakage is small, and the rotor vibration is small. This is inseparable from the design's thoroughness and the strictness of manufacturing and inspection. From the test data and the technical data of 600MW steam turbine generators at home and abroad, it can be seen that the optimized design of 6-water-hydrogen-cooled steam turbine generator not only fully meets the performance requirements of the optimized design of the Ministry of Water and Electricity, but also improves the degree of localization and reaches The current international advanced level is no worse than the performance of generators manufactured by any generator manufacturer in the world. The main advantages are a large margin of 1 rated power and maximum continuous capacity.

The power department requires that the maximum continuous capacity of the 600 generators be 654 MW, 0.9 power factor at a cooling water temperature of 20 pm to match the maximum power of the turbine. When the joint optimization design was carried out in 1987, the nuclear power department proposed that the rated power should be 650 and the maximum continuous capacity was 680 MW. Therefore, the optimized design tried to reduce the excitation loss and improve the ventilation. The rated hydrogen pressure of the optimized design 600 was reduced from the 518 pressure of the evaluation unit to 0.413. The maximum temperature rise and average temperature rise of the rotor winding are 53.8 and 40.4 design values ​​respectively, and the short-circuit and no-load temperature rise test is calculated. The average temperature rise of the rotor is 40. The stator winding cooling water temperature rises to 21 when the inlet water temperature is 50, the stator The maximum temperature of the winding is 92.7. When the hydrogen pressure is 0.413 and the capacity is 6501疋, the temperature of the stator cooling water rises to 25. The maximum temperature of the stator winding is 10. The highest temperature rise and the average temperature rise of the rotor winding are 60.5 and 45, respectively. There is still a margin, the 0.51 reduction capacity is 680MW temperature rise test, the stator winding water temperature rises 25.1, the rotor winding average temperature rises 47.6 to the standard 6th, the stator core temperature rises 41. The standard 矣7 reaches and exceeds the power section 600 of the optimized design efficiency turbogenerator knowledge, the requirements of 98.8, more efficient than 600MW turbine generator imports are slightly more efficient assessment of 600MW generator 98.67 0.27, which In the generator design is more difficult to do.

3 and the excitation field current capacity is small; co-magnetic high ceiling voltage and magnetic Le reaction rate. , 600MW assessment generator load excitation voltage to the rotor copper losses are reduced from the machine to the evaluation 5898478,2816 Comment 40400, 1608, and stomach. This not only improves the efficiency and reduce the temperature rise of the rotor winding, and can use assessment unit 600 Original toggle Jia brushless exciter field can be achieved ceiling voltage Ministry made by Ishigaki twice resistive load into account and the reaction speed is greater than each of the excitation seconds in claim 2 times the rated excitation voltage. During rated load operation, the electrical load of the brushless exciter and its rectifying components is greatly reduced, and the reliability and life are improved. If static excitation is used, the friction of the carbon brush slider is also easy to solve due to the small excitation current.

4 peaking ability.

The generator has a life expectancy of 40 years and can meet the peaking shift operation design. During the operation life of the generator, the unit is allowed to start and stop once. The geometry of the root and the slot die of the rotor is designed to avoid stress concentration. The mechanical stress is calculated using the material's yield strength of 50 as the design limit. The stress concentration does not exceed the yield strength of the material. The insulating bracket fixed in the end of the stator winding is fixed on the end structure of the stator core through the anti-magnetic spring plate. When the copper or iron expands differently when the opening or stopping or the operating temperature changes, the winding end can be freely extended and contracted in the axial direction, effectively Reduce the mechanical force generated in the winding insulation. The inner groove of the rotor slot insulation is under the copper wire side rotor retaining ring. The inner circumference of the insulating cylinder and the inner part of the insulating coil are attached with a polyvinyl chloride sliding layer, so that the rotor winding can be compared during the start-stop and load change. Free thermal expansion and contraction to prevent winding deformation and insulation damage.

5 forward phase operation and high negative sequence capacity.

The stator end of the generator adopts a magnetic shielding block platen structure, and the additional loss test has proved that the generator can be operated with a phase power factor of 95. At this time, there is no overheating of the stator end. The Wuyi Power Plant has a large unbalanced load due to the nearby power supply. The maximum negative current of the negative sequence current is 121 seconds, which is higher than the national standard, 81700461996 and positive 43. Scientific research calculations, the damper groove is added to the large teeth, and the smear-cobalt copper wedge material is used to achieve 121=10,1221 6 stator winding end fixed structure reliable vibration small 1 engineering test, stator end Winding vibration measurement results, 2 times stator rated current short-circuit amplitude plus rated no-load amplitude, maximum point amplitude is radial 741 tangential 68, axial 32 are peak-to-peak, which is less than Westinghouse standard 254, stator end winding mode The frequency of the elliptical mode is tested, the terminal is 68.6, and the excitation end is 64.9, which is far away from the frequency. The large cone ring fixed at the end of the stator winding directly extends to the slot of the stator bar, and the winding is less damaged when it encounters a sudden short circuit and a large current impact.

7 generator rotor has good dynamic characteristics.

The 6001B turbo generator rotor and exciter rotor optimized by Shanghai Turbine Generator Co., Ltd., through rotor dynamic analysis, the single rotor critical speed is away from the working speed, avoiding the working speed 15 and the rotor vibration is not sensitive. Convenient for installation balance. In the generator exciter single rotor balance has reached the set high standards, the generator exciter connected to the small shaft system test, the absolute vibration of each small shaft of each small shaft system is less than 40+ to meet the promised requirements.

8 generator stator vibration characteristics are good.

After the generator stator is assembled, all components such as the rotor cooler are included. The modal test of the base, the elliptical natural frequency of 130 strands 132 avoids the grid frequency multiplier frequency 100, and the load distribution of the stator base of the generator is installed in the field. The stress-strain method is used to measure the load at the foot of the sub-seat to make it reasonably distributed to the foundation, which greatly improves the stator vibration during field installation. The first Wusong Power Plant measures the stator frame vibration to be less than 2 wires.

9 The generator has a small amount of hydrogen leakage.

Because the generator rotor adopts the double-flow double-ring seal with advanced introduction technology, the stator seal structure and sealing material and adopts the latest imported technology structure and materials, it is optimized for the 600-site address. , 忏, 绯Ф 001 evaluation of the hydrogen charge of the generator measured 7.7524 hydrogen reduction rate of 1.4, less than the standard value.

The generator has a low voice.

The measured values ​​of the on-site noise of Unit 1 of Wujing Power Plant are all less than 8738, which is lower than the requirements of Wusong Power Plant Technical Agreement 9.

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