CN104727866B - The control method of the chaser accident that prevention Steam Flow Excited Vibration on Steam Turbine causes - Google Patents
The control method of the chaser accident that prevention Steam Flow Excited Vibration on Steam Turbine causes Download PDFInfo
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- CN104727866B CN104727866B CN201510051925.3A CN201510051925A CN104727866B CN 104727866 B CN104727866 B CN 104727866B CN 201510051925 A CN201510051925 A CN 201510051925A CN 104727866 B CN104727866 B CN 104727866B
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Abstract
The invention discloses the control method of a kind of chaser accident preventing Steam Flow Excited Vibration on Steam Turbine to cause, shake by monitoring the axle of steam turbine and each bearing of electromotor, when the high pressure rotor of steam turbine and the X of each bearing of High inter case exceed definite value to the amplitude that the arbitrary axle with Y-direction shakes, the flow instruction triggering unit is directly lowered, the pitch speed of unit closes certain amplitude, and reduce boiler load, thus suppress flow-induced vibration in time.This control method devises the recovery time of the protection definite value of two grades of flow-induced vibrations, ShiShimonoseki amplitude of flow instruction, flow instruction, can effectively suppress flow-induced vibration, it is to avoid the generation of unit chaser accident.
Description
Technical field
The present invention relates to the technical field of large-size steam turbine vibrating failure diagnosis and improvement, more particularly to the control method of a kind of chaser accident preventing Steam Flow Excited Vibration on Steam Turbine to cause.
Background technology
Adopting ultra-supereritical pressure is one of important channel improving turbine thermodynamic efficiency.Along with the structural adjustment of China's power industry, development, production and Development of Ultra-Supercritical pressure unit are that thermal power generation is saved the energy, improves environment, improves generating efficiency, reduced the inexorable trend of cost of electricity-generating.But the raising of turbine steam condition can cause high pressure cylinder to enter, and vapour density increases, flow velocity improves, vapor action tangential force on rotor is to dynamic and static gaps, the sensitivity improve sealing structure and rotor and cylinder alignment degree, increasing the exciting force acting on rotor, this makes the probability of supercritical turbine burst steam flow excitation be greatly increased.
Along with the Large-scale machine set of supercritical 600MW, ultra supercritical 1000MW grade puts into operation in a large number, steam flow excitation problem exposed day by day is out.Steam flow excitation belongs to self-excited vibration, is encouraged, by the internal Steam excited force of steam turbine, the vibration caused.Steam flow excitation can make shafting stability reduce, and can bring out rotor unstability time serious, produces very big low-frequency vibration, and steam flow excitation becomes one of the key factor affecting ultra supercritical steam turbine reliability and the subject matter faced.Steam flow excitation belongs to sudden vibration; the feature of its Unpredictability and initiation amplitude low-frequency vibration; when in running, steam flow excitation fault occurs; particularly in high load capacity, elevated steam conditions situation; the vibration that moment (several seconds time) excites can exceed turbine vibration supervision limit value; this will result directly in the big chaser accident of vibration, the safety of serious threat unit and economical operation.
Summary of the invention
The technical problem to be solved in the present invention is, the control method of a kind of chaser accident preventing Steam Flow Excited Vibration on Steam Turbine to cause is provided, can effectively suppress amplitude steam flow excitation fault by this control method, with reach steam turbine not because of steam flow excitation fault the purpose of chaser.
The technical solution of the present invention is to provide the control method of the chaser accident that a kind of prevention Steam Flow Excited Vibration on Steam Turbine having steps of causes, it is characterised in that: it comprises the following steps:
Step 1, when unit load is more than m value, start to start the defence program of chaser accident that prevention Steam Flow Excited Vibration on Steam Turbine causes；
Step 2, the axle that the vibration test system of axle system obtains steam turbine and each bearing of electromotor by steam turbine safety system and steam turbine fault diagnosis system shake；
Step 3, entering corresponding control model according to the high pressure rotor of obtained steam turbine and the X of each bearing of High inter case to the amplitude shaken with the axle of Y-direction, concrete control model is as follows:
1., when the amplitude that the high pressure rotor of steam turbine and the X of each bearing of High inter case shake to the arbitrary axle with Y-direction is more than A value, unit sends flow, and to lower instruction be a1 value, and unit pitch ShiShimonoseki amplitude is b1 value, while boiler load reduction c1 value；
2., when the amplitude that the high pressure rotor of steam turbine and the X of each bearing of High inter case shake to the arbitrary axle with Y-direction is more than B value, unit sends flow, and to lower instruction be a2 value, and unit pitch ShiShimonoseki amplitude is b2 value, while boiler load reduction c2 value；
3., when the high pressure rotor of steam turbine and the X of each bearing of High inter case are respectively less than C value to the amplitude that the axle with Y-direction shakes and after duration T 1, the flow instruction of unit recovers initial set value, and recovery time is T2.
After adopting above structure, the control method of the chaser accident that the prevention Steam Flow Excited Vibration on Steam Turbine of the present invention causes, compared with prior art, have the advantage that
The control method of chaser accident caused due to the prevention Steam Flow Excited Vibration on Steam Turbine of the present invention is shaken by the axle of monitoring steam turbine and each bearing of electromotor, when the high pressure rotor of steam turbine and the X of each bearing of High inter case exceed definite value to the amplitude that the arbitrary axle with Y-direction shakes, the flow instruction triggering unit is directly lowered, the pitch speed of unit closes certain amplitude, and reduce boiler load, thus suppress flow-induced vibration in time.This control method devises the recovery time of the protection definite value of two grades of flow-induced vibrations, ShiShimonoseki amplitude of flow instruction, flow instruction, can effectively suppress flow-induced vibration, it is to avoid the generation of unit chaser accident.
As the another kind of improvement of the present invention, described m value is 500～550MW.Described A value is 75～85 μm；Described a1 value is-2.5%～-3.5%；Described b1 value is 9%～11%；Described c1 value is 25～35MW.Described B value is 115～125 μm；Described a2 value is-4.5%～-5.5%；Described b2 value is 14%～16%；Described c2 value is 45～55MW.Described C value is 55～65 μm；Described T1 is 280～320 seconds；Described T2 is also 280～320 seconds.
Accompanying drawing explanation
Fig. 1 is the shaft system arrangement figure of the steam turbine of the control method of the chaser accident that the present invention prevents Steam Flow Excited Vibration on Steam Turbine to cause.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Referring to shown in Fig. 1, certain power plant #1 unit selects the impulsion condensing turbine N1030-24.36/600/600 of east vapour autonomous innovation first.Shaft system of unit is made up of high pressure rotor, middle pressure rotor, A low pressure rotor, B low pressure rotor, generator amature, and every roots rotor, by two bearings, is 1～No. 10 from steam turbine end to motor side number consecutively.Adopting rigidity that wheel is connected between every roots rotor, thrust bearing is between 2, No. 3 bearings, and work surface is in generator side.Wherein 1,2,3, No. 4 bearings are tilting-pad bearing, are respectively arranged with six pieces of tilting bush, and 5,6,7, No. 8 bearings adopt seat cylinder formula elliptic bearing, and 9, No. 10 bearings adopt end cover type elliptic bearing.
Unit vibration test system is furnished with the TDM system TN8000 of the TSI system of a set of Philip, a set of China Tech Tongan City company, can continuous acquisition shaft system of unit each bearing place axle shake, the parameter such as watt shake.Per pass bearing block 45 ° (angle with horizontal plane formation), 135 ° of (angle with horizontal plane formation) directions respectively configure an eddy current sensor, the vortex sensor measuring gained at bearing block 45 ° place be bearing X to axle amplitude, the vortex sensor measuring gained at bearing block 135 ° place is the axle amplitude of bearing Y-direction.
This machine is when on-load to 520MW, and high pressure rotor occurs in that sudden steam flow excitation, is administered by online steam flow excitation, and unit energy on-load is to operating mode at full capacity, but there is the low-frequency vibration of small magnitude all the time.One day 0:50, No. 1 unit runs 2 hours at 980MW stable conditions, and 1, No. 2 axles shake and sudden change again occur, and No. 1 bearing Y-direction and No. 2 bearing Y-direction axle amplitude moments respectively are reached for 250,362 μm, thus causing unit chaser.Adopt the chaser accident that the present invention prevents steam flow excitation to cause.
The control method of adopt the present invention to prevent chaser accident that Steam Flow Excited Vibration on Steam Turbine causes, it comprises the following steps:
Step 1, when unit load is more than 500MW, start to start the defence program of chaser accident that prevention Steam Flow Excited Vibration on Steam Turbine causes；
Step 2, the axle that the vibration test system of axle system obtains steam turbine and each bearing of electromotor by steam turbine safety system and steam turbine fault diagnosis system shake；
Step 3, entering corresponding control model according to the high pressure rotor of obtained steam turbine and the X of each bearing of High inter case to the amplitude shaken with the axle of Y-direction, concrete control model is as follows:
1., when the amplitude that the high pressure rotor of steam turbine and the X of each bearing of High inter case shake to the arbitrary axle with Y-direction is more than 80 μm, unit sends flow, and to lower instruction be-3%, and unit pitch ShiShimonoseki amplitude is 10%, the 30MW of boiler load reduction simultaneously；
2., when the amplitude that the high pressure rotor of steam turbine and the X of each bearing of High inter case shake to the arbitrary axle with Y-direction is more than 120 μm, unit sends flow, and to lower instruction be-5%, and unit pitch ShiShimonoseki amplitude is 15%, the 50WM of boiler load reduction simultaneously；
3., when the high pressure rotor of steam turbine and the X of each bearing of High inter case are respectively less than 60 μm to the amplitude that the axle with Y-direction shakes and after the persistent period 300, the flow instruction of unit recovers initial set value, and recovery time is 300.
After protecting control method above, flow-induced vibration is effectively suppressed, No. 1 bearing Y-direction and No. 2 bearing Y-direction axle amplitudes all recover to normal value, by unit allocation in safety and Health operational mode, it is to avoid the generation of unit chaser accident.
Claims (1)
1. the control method of the chaser accident that a kind is prevented Steam Flow Excited Vibration on Steam Turbine to cause, it is characterised in that: it comprises the following steps:
Step 1, when unit load is more than m value, start to start the defence program of chaser accident that prevention Steam Flow Excited Vibration on Steam Turbine causes；Described m value is 500MW；
Step 2, the axle that the vibration test system of axle system obtains steam turbine and each bearing of electromotor by steam turbine safety system and steam turbine fault diagnosis system shake；
Step 3, entering corresponding control model according to the high pressure rotor of obtained steam turbine and the X of each bearing of High inter case to the amplitude shaken with the axle of Y-direction, concrete control model is as follows:
1., when the amplitude that the high pressure rotor of steam turbine and the X of each bearing of High inter case shake to the arbitrary axle with Y-direction is more than A value, unit sends flow, and to lower instruction be a1 value, and unit pitch ShiShimonoseki amplitude is b1 value, while boiler load reduction c1 value；Described A value is 75～85 μm；Described a1 value is-2.5%～-3.5%；Described b1 value is 9%～11%；Described c1 value is 25～35MW；
2., when the amplitude that the high pressure rotor of steam turbine and the X of each bearing of High inter case shake to the arbitrary axle with Y-direction is more than B value, unit sends flow, and to lower instruction be a2 value, and unit pitch ShiShimonoseki amplitude is b2 value, while boiler load reduction c2 value；Described B value is 115～125 μm；Described a2 value is-4.5%～-5.5%；Described b2 value is 14%～16%；Described c2 value is 45～55MW；
3., when the high pressure rotor of steam turbine and the X of each bearing of High inter case are respectively less than C value to the amplitude that the axle with Y-direction shakes and after duration T 1, the flow instruction of unit recovers initial set value, and recovery time is T2；Described C value is 55～65 μm；Described T1 is 280～320 seconds；Described T2 is also 280～320 seconds.
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| CN105840250B (en) * | 2016-05-03 | 2017-11-03 | 大唐东北电力试验研究所有限公司 | Turbo-generator Set Vibration protection device and method |
| CN106569407B (en) * | 2016-09-11 | 2019-08-20 | 国网浙江省电力公司电力科学研究院 | A kind of online administering method of Steam Flow Excited Vibration on Steam Turbine based on vibration gradient control |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5859302A (en) * | 1981-10-02 | 1983-04-08 | Toshiba Corp | Monitor for steam turbine |
| JPS59170407A (en) * | 1983-03-17 | 1984-09-26 | Toshiba Corp | Vibration monitoring device for steam turbine |
| JPS6189912A (en) * | 1984-10-11 | 1986-05-08 | Toshiba Corp | Turbine vibration monitoring device |
| JPH10259704A (en) * | 1997-03-19 | 1998-09-29 | Toshiba Corp | Steam turbine control device |
| JP2000356107A (en) * | 1999-06-15 | 2000-12-26 | Mitsubishi Heavy Ind Ltd | Device for preventing vibration of rotor by regulating steam passage of steam turbine |
| US6505143B1 (en) * | 2000-01-20 | 2003-01-07 | General Electric Company | Machine protection system for rotating equipment and method |
| CN101403648A (en) * | 2008-11-20 | 2009-04-08 | 华北电力大学 | Steam flow excitation fault real-time diagnosis method for large steam turbine-generator |
| CN101586480A (en) * | 2009-06-18 | 2009-11-25 | 高利斌 | A kind of control technique that reduces abnormal vibrations in the steam turbine red switch process |
| CN102095564B (en) * | 2011-02-12 | 2012-05-09 | 华北电力大学 | Method for identifying fluctuation rub-impact fault of turbo generator set in real time |
| CN102680243A (en) * | 2012-05-14 | 2012-09-19 | 华北电力大学 | Online judgment method for steam flow shock excitation fault of steam turbine generator unit |
| CN203879555U (en) * | 2014-05-06 | 2014-10-15 | 大唐鲁北发电有限责任公司 | Steam turbine vibration protection device |
-
2015
- 2015-01-31 CN CN201510051925.3A patent/CN104727866B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5859302A (en) * | 1981-10-02 | 1983-04-08 | Toshiba Corp | Monitor for steam turbine |
| JPS59170407A (en) * | 1983-03-17 | 1984-09-26 | Toshiba Corp | Vibration monitoring device for steam turbine |
| JPS6189912A (en) * | 1984-10-11 | 1986-05-08 | Toshiba Corp | Turbine vibration monitoring device |
| JPH10259704A (en) * | 1997-03-19 | 1998-09-29 | Toshiba Corp | Steam turbine control device |
| JP2000356107A (en) * | 1999-06-15 | 2000-12-26 | Mitsubishi Heavy Ind Ltd | Device for preventing vibration of rotor by regulating steam passage of steam turbine |
| US6505143B1 (en) * | 2000-01-20 | 2003-01-07 | General Electric Company | Machine protection system for rotating equipment and method |
| CN101403648A (en) * | 2008-11-20 | 2009-04-08 | 华北电力大学 | Steam flow excitation fault real-time diagnosis method for large steam turbine-generator |
| CN101586480A (en) * | 2009-06-18 | 2009-11-25 | 高利斌 | A kind of control technique that reduces abnormal vibrations in the steam turbine red switch process |
| CN102095564B (en) * | 2011-02-12 | 2012-05-09 | 华北电力大学 | Method for identifying fluctuation rub-impact fault of turbo generator set in real time |
| CN102680243A (en) * | 2012-05-14 | 2012-09-19 | 华北电力大学 | Online judgment method for steam flow shock excitation fault of steam turbine generator unit |
| CN203879555U (en) * | 2014-05-06 | 2014-10-15 | 大唐鲁北发电有限责任公司 | Steam turbine vibration protection device |
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