CN101320259A - Important component service life management method and system for unit generator set main unit - Google Patents

Abstract

The present invention relates to a life management system of the important parts of the main units of an elementary generator set. The life management system is characterized in that a web server is respectively connected with a computation/application server and a database server, and the database server is connected with the data acquisition system and the parameter-measuring points of the main units of the elementary generator set through an external system interface. In the management method of the life management system, the transient service life expenditures of the important parts of the main units of the elementary generator set are calculated online, the residual low-cycle fatigue life and the residual creep life of the important parts of the main units of the elementary generator set are calculated, and the residual lives of generator rotors under the joint effect of creep deformation and low-cycle fatigue, the joint effect of low-cycle fatigue and torsional oscillation fatigue and the joint effect of erosion and abrasion are calculated. The present invention has the advantage that the present invention adopts the life management system to realize the online calculation and monitoring of the transient service life expenditures and the residual lives of the multiple important parts of the four main units of the elementary generator set.

Description

A kind of elementary generator group main frame vitals service life management method and system

Technical field

The present invention relates to a kind of elementary generator group main frame vitals service life management method and system, be applied to the equipment control of operation of elementary generator group and maintenance, belong to generation engineering and genset technical field.

Background technology

Four big main frames of generating plant genset are steam turbine, boiler, generator and transformer, vitals comprises: the rotor of steam turbine, cylinder and valve casing, the drum of boiler or steam-water separator, collection case, pipeline, superheater and reheater pipe, water-cooling wall and economizer pipe, the rotor of generator, stator winding insulation, the winding insulation of main-transformer.The generator set main vitals involves great expense, and damage sequence is serious.In order rationally to use the generator set main vitals life-span, the prior art of the generator set main vitals life-span management of open source literature report, all be that single vitals to a certain main frame of a genset carries out life-span management, be used for instructing operation, maintenance and equipment control.Because a generator set main has four host computer, a main frame has a plurality of vitals again, and these main frame vitals need carry out life-span management simultaneously.Adopt prior art to carry out life-span management two aspect deficiencies are arranged: the deficiency of first aspect is a vitals configuration one cover life span management system of an a certain main frame of genset, the life-span management of a plurality of vitals of genset multiple host need dispose tens cover life span management systems, investment is high, the O﹠M inconvenience; The second aspect deficiency is to instruct the operation or the scheme of arrangement maintenance of whole genset according to the life-span management result of a certain vitals of a certain main frame of genset, and considering a problem still can not be comprehensive.

Summary of the invention

The purpose of this invention is to provide a kind of method and system that adopt a cover life span management system to realize elementary generator group four host computer vitals life-span management.

For realizing above purpose, technical scheme of the present invention provides a kind of elementary generator group main frame vitals life span management system, it is characterized in that, by Calculation for life/application server and software, database server, external system interface, generator set main data acquisition system (DAS) DAS and parameter measuring point, web page server and user side browser are formed, web page server respectively with the calculated/applied server, database server is connected with the user side browser, the calculated/applied server is connected with database server, and database server is connected with the parameter measuring point with the generator set main data acquisition system (DAS) by external system interface.

Described parameter measuring point is: before the rotating speed of steam turbine, the power of the assembling unit, stop valve before vapour pressure, the stop valve behind steam temperature, the governing stage before vapor (steam) temperature, governing stage position high-pressure inner cylinder metal temperature, the middle pressure stop valve before vapour pressure, the middle pressure stop valve steam temperature, middle pressure inner casing metal temperature, middle steam discharge press or four draw gas pressure, middle steam discharge temperature or four draw gas temperature, mesolow cross over pipe temperature, condenser vacuums; Main-steam outlet flow, temperature and the pressure of boiler, flow, temperature and the pressure of the outlet of boiler reheated steam, boiler feedwater flow, temperature and pressure, reheated steam inlet flow rate, temperature and pressure, the wall temperature measuring point value of drum or steam-water separator and collection case and pipeline; The active power of generator, three-phase current and voltage, generator shaft are torsional vibration signals, the working temperature of stator winding insulation in generator.

The management method in a kind of elementary generator group main frame vitals life-span, it is characterized in that, the life consumption of the elementary generator group main frame vitals of employing C language compilation and the software for calculation of residual life operate on the calculated/applied server, be applied to elementary generator group main frame vitals life-span management, its method is: the first step: deposit online monitoring data in

By external system interface, minute measuring point datas such as the flow of generator set main data acquisition system (DAS) DAS system online acquisition, pressure, temperature, rotating speed, power, wall temperature, electric current, voltage, torsional vibration signals, working temperature are deposited in database server to 30 minutes every Δ τ=1;

Second step: input basic data

On the user side browser, in database server, imported the accumulative total hours of operation S of genset by web page server every Δ m=1 days to 7 days by maintenance department user side _h, accumulative total cold start frequency n _c, accumulative total warm starting frequency n _w, accumulative total hot starting, hot start frequency n _h, accumulative total very hot startup frequency n _r, accumulative total big load change frequency n ₁, accumulative total in the load change frequency n ₂, accumulative total little load change frequency n ₃After each scheduled overhaul finished, maintenance department imported the wall-thickness measurement δ of pipe in database server by web page server on the user side browser;

The 3rd step: the longevity assessment project of determining the main frame vitals

According to the experience of the life-span management accumulation of being engaged in genset for many years, definition unit generator set main vitals longevity assessment repertory is shown in table 1

[table 1]

The 4th step: the transient state life consumption d of online computing unit generator set main vitals _iAnd d _vApplication is installed in the Life Calculation machine software of generator set main vitals on the calculated/applied server, adopts the transient-state low-cycle fatigue life loss d of the online computing unit generator set main of prior art vitals _iWith transient state torsional oscillation loss fatigue lifetime d _v

The 5th step: propose elementary generator group optimization operation suggestion

The generator set main vitals is at the low-cycle fatigue life life consumption d of line computation _iWith torsional oscillation loss fatigue lifetime d _vRespectively with the low-cycle fatigue life loss boundary value [d] and the torsional oscillation loss fatigue lifetime [d of generator set main vitals _v] compare, if d _i≤ 0.8[d], the rate of change of generator set main main steam temperature and the rate of change of load are by the stated number Value Operations of " generator set main operating standard "; If d _v≤ [d _v], unit normally moves.At d _i＞0.8[d] under the situation, propose to optimize the operation suggestion by situation in following four: if 0.8[d]＜d _i≤ [d] reduces the rate of change of generator set main main steam temperature and the rate of change of load; [if d]＜d _i≤ 1.05[d], the rate of change of control generator set main main steam temperature and the rate of change of load are 0; If 1.05[d]＜d _i≤ 1.25[d], give the alarm tripping grinder after 30 minutes; If d _i＞1.25[d], give the alarm tripping grinder after 1 minute; At d _v＞0.8[d _v] under the situation, send warning;

The 6th step: computing unit generator set main vitals residue low-cycle fatigue life y _RlniThe technician of maintenance department user side browser sends instruction by web page server to the calculated/applied server, the calculated/applied server reads the needed accumulative total number of starts and accumulative total load change number of times from database server, utilize the cold conditions start and stop life-span N of the generator set main vitals that calculated in advance draws in the Life Calculation software in the calculated/applied server _Fc, warm attitude start and stop life-span N _Fw, hot start and stop life-span N _Fh, very hot attitude start and stop life-span N _Fr, big load change life-span N _F1, middle load change life-span N _F2With little load change life-span N _F3And average annual low-cycle fatigue life loss speed e _N, the low-cycle fatigue residual life y of calculating generator group main frame low pressure rotor, drum, steam-water separator, low temperature collection case and Low Temperature Steam pipeline _RlniFor:

$y_{r\ln i}=(D_{\mathrm{Ni}}-E_{\mathrm{Ni}})/e_{\mathrm{Ni}}$

$=[D_{\mathrm{Ni}}-(\frac{n_c}{N_{\mathrm{fc}}}+\frac{n_w}{N_{\mathrm{fw}}}+\frac{n_h}{N_{\mathrm{fh}}}+\frac{n_r}{N_{\mathrm{fr}}}+\frac{n_1}{{\mathrm{<figure-callout\; id="1"\; label="N\; f"\; filenames="A20071017227900191.png"\; state="\{\{state\}\}">N</figure-callout>}}_f}+\frac{n_2}{N_{f2}}+\frac{n_3}{N_{f3}})\&times;100\%]/e_{\mathrm{Ni}}$

In the formula, D _NiFor the desired value of loss entire life of generator set main vitals, according to being engaged in for many years

The experience of genset life-span management accumulation, definition D _NiSpan be D _Ni=75%-100%;

The 7th step: computing unit generator set main vitals residue y creep life _Rlti

The technician of maintenance department user side browser sends instruction by web page server to the calculated/applied server, and the calculated/applied server reads the accumulative total hours worked τ of needed high-temperature component at each temperature section from database _j, utilize design load τ creep life of the corresponding different temperatures section class mean that calculated in advance draws in the Life Calculation software in the calculated/applied server _RjAnd average annual creep life loss velocity e _Ti, residue y creep life of calculating boiler reheater pipe and superheater pipe _RltiFor:

$y_{\mathrm{rlti}}=(D_{\mathrm{ti}}-E_{\mathrm{ti}})/e_{\mathrm{ti}}=(D_{\mathrm{ti}}-\left(\mathrm{\&Sigma;}\frac{{\mathrm{\&tau;}}_i}{{\mathrm{\&tau;}}_{\mathrm{Rj}}}\right)\&times;100\%)/e_{\mathrm{ti}}$

In the formula, D _TiFor the desired value of the total creep life consumption of generator set main vitals, according to for many years

Be engaged in the experience of genset life-span management accumulation, definition D _TiSpan be D _Ti=75%-100%;

The 8th step: the residual life of computing unit generator set main vitals under creep and low-cycle fatigue acting in conjunction adopts prior art, the accumulation low-cycle fatigue life loss E of online calculating generator group high-temperature component _Ni, accumulation creep life consumption E _TiWith average annual life consumption speed e _Yi, the residual life y of the high pressure rotor of genset, high-pressure inner cylinder, middle pressure inner casing, high pressure main stop valve valve casing, middle pressure stop valve valve casing, high temperature collection case, high-temperature pipe _RlntiFor:

y _rlnti＝(D-E _Ni-E _ti)/e _yi

In the formula, D is the desired value of loss entire life of generator set main vitals, according to the experience of being engaged in the accumulation of genset life-span management for many years, and definition D=100%;

The 9th step: the residual life y of computing unit generator set main vitals under low-cycle fatigue and the tired acting in conjunction of torsional oscillation _Rlnvi

Adopt prior art, calculating generator rotor accumulation low-cycle fatigue life loss E _Ni, accumulation torsional oscillation loss fatigue lifetime E _ViWith average annual life consumption rate e _Zi, the residual life y of generator amature _RlnviFor:

y _rlnvi＝(D-E _Ni-E _vi)/e _zi

The tenth step: the residual life y of computing unit generator set main vitals under corrosion and wearing and tearing acting in conjunction _Rlai

In database, read the wall-thickness measurement δ of pipe, utilize the data of Life Calculation software design in the calculated/applied server, comprise pipe original wall thickness δ ₀, pipe original outer diameter D ₀, the creep limit σ of steel under serviceability temperature _c, pipe internal pressure P, the cigarette side corrosion of boiler water wall pipe and economizer pipe and the residual life y under the abrasive action _Rlai

$y_{\mathrm{rlai}}=\frac{\mathrm{\&delta;}({2\mathrm{\&sigma;}}_c-P)-P(D_0-2{\mathrm{\&delta;}}_0)}{v({2\mathrm{\&sigma;}}_c-P)}$

In the formula, v=(δ ₁-δ ₀)/S _H1, δ ₁Be the wall thickness of last time measurement, S _H1For recording δ ₁And δ ₀Between the accumulative total hours of operation;

The 11 step: the residue insulation life y of calculating generator group main frame vitals _Rlwi

At the accumulative total hours worked τ of line computation winding in each voltage section _EjWith accumulative total τ hours worked at each temperature section _Hj, utilize the winding insulation electricity aging life-span t of the different voltages of the pre-determined correspondence of life-span planning software in the calculated/applied server _EjWinding insulation thermal lifetime t with corresponding different operating temperature _HjAnd average annual insulation ag(e)ing life consumption e _Wi, the insulation ag(e)ing life-span y of generator unit stator winding and main-transformer winding _RlwiFor:

$y_{\mathrm{rlwi}}=(D_w-\mathrm{\&Sigma;}\frac{{\mathrm{\&tau;}}_{\mathrm{ej}}}{t_{\mathrm{ej}}}-\mathrm{\&Sigma;}\frac{{\mathrm{\&tau;}}_{\mathrm{hj}}}{t_{\mathrm{hj}}})/e_{\mathrm{wi}}$

In the formula, D _wBe winding loss entire life, according to the experience of being engaged in the accumulation of genset life-span management for many years, definition D _w=100%;

The 12 step: the recommendation unit genset is optimized maintenance measure

Residual life y according to each vitals of generator set main _Rlxi(y _Rlni, or y _Rlti, or y _Rlnti, or y _Rlnvi, or y _Rlnai, or y _Rlnwi) predict the outcome, recommend the optimization maintenance measure of generator set main in the scheduled overhaul to be:

1.y _Rlxi＜1.5 years, suggestion year interior scheme of arrangement maintenance was overhauled or is changed;

2.1.5 year≤y _Rlxi＜4.5 years, advise after 1 year but scheme of arrangement maintenance in 4 years is overhauled or changed;

3.4.5 year≤y _Rlxi＜8.5 years, advise next time in the scheduled overhaul mechanical part being given detailed defect detecting test, to the winding insulation design test that wears out;

4.y _Rlxi〉=8.5 years, the scheduled overhaul cycle and the scheduled overhaul project of elementary generator group arranged in suggestion according to power plant's " electricity power enterprise's overhaul of the equipments guide rule ";

The 13 step: print result

Output and print unit generator set main vitals transient state life consumption d _iAnd d _vOn-line monitoring result and the elementary generator group optimization operation suggestion that is proposed, and elementary generator group main frame vitals residual life y _RlxiThe optimization maintenance measure that predicts the outcome and recommend.

The present invention has following characteristics:

The present invention uses life span management system given above and method, according to elementary generator unit online monitoring data, operation statistics, maintenance measurement data and design data, the transient state life consumption of online computing unit generator set main vitals instructs operation; The residual life of online computing unit generator set main vitals instructs overhaul of the equipments.

Advantage of the present invention is the operational phase in the elementary generator group, adopt a cover life span management system, realized the transient state life consumption of a plurality of vitals of elementary generator group four host computer and residual life in line computation and monitoring, operation is instructed in transient-state low-cycle fatigue life loss and loss fatigue lifetime of transient state torsional oscillation according to monoblock main frame vitals, residual life according to elementary generator group main frame vitals comes the scheme of arrangement maintenance, can make the life-span of whole elementary generator group main frame vitals be in slave mode, both can avoid the designed life of unsuitable operation and too much loss monoblock main frame vitals, can fully use the residual life of generator set main vitals again, realized that employing life-span management technology comes administrative unit genset equipment, reach and both reduce generator set main vitals life consumption, rationally use the technique effect of genset vitals residual life again.

Description of drawings

Fig. 1 adopts the block scheme of vitals life span management system for the present invention;

Fig. 2 is the process flow diagram of method that life-span management of the present invention adopts;

Fig. 3 is the computer software block diagram of life-span management of the present invention;

Fig. 4 is the generator set main residual service life of components synoptic diagram that predicts the outcome.

Embodiment

As shown in Figure 1, for vapour elementary generator group main frame vitals life span management system, form by Calculation for life/application server and software 1, database server 2, external system interface 3, generator set main data acquisition system (DAS) DAS and parameter measuring point 4, web page server 5 and user side browser 6.Web page server 5 is connected with calculated/applied server 1, database server 2 and user side browser 6 respectively, calculated/applied server 1 is connected with database server 2, and database server 2 is connected with parameter measuring point 4 with the generator set main data acquisition system (DAS) by external system interface 3.

As shown in Figure 2, for the invention provides the process flow diagram of method, as shown in Figure 3, adopt the elementary generator group main frame vitals life-span management computer software block diagram of C language compilation for the present invention, this software is installed on the calculated/applied server of elementary generator group main frame vitals life-span management, is applicable to the life-span management of the different vitals of elementary generator group main frame.

The invention will be further described below in conjunction with drawings and Examples.

Embodiment

For certain model throttle (steam) temperature is the high pressure rotor of 566 ℃ overcritical 600MW generator set main, high-pressure inner cylinder, low pressure rotor, steam-water separator, the superheater pipe, superheater high temperature collection case, generator amature, stator winding insulation in generator, the main-transformer winding insulation, adopt life span management system shown in Figure 1, the computer software of the process flow diagram of the employing method that the invention provides as shown in Figure 2 and generator set main vitals life-span management shown in Figure 3, the predicting the outcome of residual life that calculates above generator set main vitals listed in Fig. 4.

The first step: every Δ τ=3 minute, by external system interface 3 the measuring point parameter of genset in the measuring point data of this 600MW steam turbine data acquisition system (DAS) DAS 4 is deposited in database server 2, these parameters are: the rotating speed of steam turbine, the power of the assembling unit, vapour pressure before the stop valve, steam temperature before the stop valve, vapor (steam) temperature behind the governing stage, governing stage position high-pressure inner cylinder metal temperature, the middle preceding vapour pressure of stop valve of pressing, the middle preceding steam temperature of stop valve of pressing, the middle inner casing metal temperature of pressing, in steam discharge press or four pressures of drawing gas, in steam discharge temperature or four temperature of drawing gas, mesolow cross over pipe temperature, condenser vacuum; Main-steam outlet flow, temperature and the pressure of boiler, flow, temperature and the pressure of the outlet of boiler reheated steam, boiler feedwater flow, temperature and pressure, reheated steam inlet flow rate, temperature and pressure, the wall temperature measuring point value of drum or steam-water separator and collection case and pipeline; The active power of generator, three-phase current and voltage, generator shaft are torsional vibration signals, the working temperature of stator winding insulation in generator;

Second step:, import this 600MW generator set main accumulative total hours of operation S every Δ m=1 days _h, accumulative total cold start frequency n _c, accumulative total warm starting frequency n _w, accumulative total hot starting, hot start frequency n _h, accumulative total very hot startup frequency n _r, accumulative total big load change frequency n ₁, accumulative total in the load change frequency n ₂, accumulative total little load change frequency n ₃After each scheduled overhaul finished, maintenance department was at the wall-thickness measurement δ that imports pipe on the user side browser 6 by web page server 5 in database server 2;

The 3rd step: the longevity assessment project of 8 vitals of this 600MW unit main frame is listed in table 2

[table 2]

The 4th step: measuring point data in the online reading database server 2, use a plurality of parts low-cycle fatigue life of monoblock main frame management software, calculate the transient-state low-cycle fatigue life loss d of this 600MW generator set main high pressure rotor, high-pressure inner cylinder, low pressure rotor, steam-water separator, high temperature superheater collection case, generator amature _iOr transient state torsional oscillation loss fatigue lifetime d _v, deposit database server in.

The 5th step: according to the experience of being engaged in generator set main component life administrative skill research work accumulation for many years, the boundary value [d] and [d of definition generator set main low cycle fatigue life consumption of components _v] be illustrated in table 3;

[table 3]

These nine parts of a certain moment in certain load change process of this 600MW genset all have d _i=＜0.8[d], optimize the operation suggestion and be the load up speed of the temperature rise rate and the steam turbine that do not need to adjust the steam turbine main steam temperature.

The 6th step to the 11 step: for this model 600MW unit main frame, the design calendar life of these nine parts and average life consumption rate are listed in table 4, and the online result of calculation of residual life is illustrated in table 5 and Fig. 4;

[table 4]

[table 5]

The 12 step: this 600MW generator set main used after 11.5, the residual life minimum of main-transformer winding insulation is 6.5 years, the maintenance treatment measures of recommending are for carrying out the aging design test of main-transformer winding insulation in the cycle at next scheduled overhaul, service parts planning is purchased in arrangement as a result according to design test; The maintenance treatment measures of other main frame vitals are the scheduled overhaul cycle and the scheduled overhaul project of arranging the elementary generator group according to " electricity power enterprise's overhaul of the equipments guide rule ".

Adopt the management method and the system in elementary generator group main frame vitals life-span provided by the invention, the transient state life consumption and the residual life of nine vitals that can this 600MW genset four host computer of online quantitative Analysis, propose to optimize the operation suggestion according to the online result of calculation of transient state life consumption, according to scheduled major overhaul cycle and the scheduled major overhaul project that the predicting residual useful life result arranges elementary generator group main frame vitals, make the life-span of nine vitals of this 600MW genset four host computer be in slave mode.Life-span management result according to nine parts of this 600MW genset four host computer takes to move control measure and scheme of arrangement maintenance, these nine the parts safe operations of this 600MW generator set main both can have been guaranteed, can rationally use residual life again, realize using a cover life span management system to manage the technique effect of nine component lifes of these 600MW genset four big main frames.

Claims (3)

1. elementary generator group main frame vitals life span management system, it is characterized in that, by Calculation for life/application server and software (1), database server (2), external system interface (3), generator set main data acquisition system (DAS) DAS and parameter measuring point (4), web page server (5) and user side browser (6) are formed, web page server (5) respectively with calculated/applied server (1), database server (2) is connected with user side browser (6), calculated/applied server (1) is connected with database server (2), and database server (2) is connected with parameter measuring point (4) with generator set main data acquisition system (DAS) DAS by external system interface (3).

2. a kind of elementary generator group main frame vitals life span management system according to claim 1, it is characterized in that described parameter measuring point is: before the rotating speed of steam turbine, the power of the assembling unit, stop valve before vapour pressure, the stop valve behind steam temperature, the governing stage before vapor (steam) temperature, governing stage position high-pressure inner cylinder metal temperature, the middle pressure stop valve before vapour pressure, the middle pressure stop valve steam temperature, middle pressure inner casing metal temperature, middle steam discharge press or four draw gas pressure, middle steam discharge temperature or four draw gas temperature, mesolow cross over pipe temperature, condenser vacuums; Main-steam outlet flow, temperature and the pressure of boiler, flow, temperature and the pressure of the outlet of boiler reheated steam, boiler feedwater flow, temperature and pressure, reheated steam inlet flow rate, temperature and pressure, the wall temperature measuring point value of drum or steam-water separator and collection case and pipeline; The active power of generator, three-phase current and voltage, generator shaft are torsional vibration signals, the working temperature of stator winding insulation in generator.

3. the management method in a kind of elementary generator group main frame vitals life-span according to claim 1, it is characterized in that, the life consumption of the elementary generator group main frame vitals of employing C language compilation and the software for calculation of residual life operate on the calculated/applied server (1), be applied to elementary generator group main frame vitals life-span management, its method is:

The first step: deposit online monitoring data in

By external system interface (3), minute measuring point datas such as the flow of generator set main data acquisition system (DAS) DAS system (4) online acquisition, pressure, temperature, rotating speed, power, wall temperature, electric current, voltage, torsional vibration signals, working temperature are deposited in database server (2) to 30 minutes every Δ τ=1;

Second step: input basic data

Upward in database server (2), imported the accumulative total hours of operation S of genset by web page server (5) at user side browser (6) every Δ m=1 days to 7 days by maintenance department user side _h, accumulative total cold start frequency n _c, accumulative total warm starting frequency n _w, accumulative total hot starting, hot start frequency n _h, accumulative total very hot startup frequency n _r, accumulative total big load change frequency n ₁, accumulative total in the load change frequency n ₂, accumulative total little load change frequency n ₃After each scheduled overhaul finished, the wall-thickness measurement δ that imports pipe by web page server (5) in database server (2) went up in maintenance department at user side browser (6);

The 3rd step: the longevity assessment project of determining the main frame vitals

According to the experience of the life-span management accumulation of being engaged in genset for many years, definition unit generator set main vitals longevity assessment repertory is shown in table 1

[table 1]

The 4th step: the transient state life consumption d of online computing unit generator set main vitals _iAnd d _vApplication is installed in the Life Calculation machine software of generator set main vitals on the calculated/applied server, adopts the transient-state low-cycle fatigue life loss d of the online computing unit generator set main of prior art vitals _iWith transient state torsional oscillation loss fatigue lifetime d _v

The 5th step: propose elementary generator group optimization operation suggestion

The generator set main vitals is at the low-cycle fatigue life life consumption d of line computation _iWith torsional oscillation loss fatigue lifetime d _vRespectively with the low-cycle fatigue life loss boundary value [d] and the torsional oscillation loss fatigue lifetime [d of generator set main vitals _v] compare, if d _i≤ 0.8[d], the rate of change of generator set main main steam temperature and the rate of change of load are by the stated number Value Operations of " generator set main operating standard "; If d _v≤ [d _v], unit normally moves.At d _i＞0.8[d] under the situation, propose to optimize the operation suggestion by following four kinds of situations: if 0.8[d]＜d _i≤ [d] reduces the rate of change of generator set main main steam temperature and the rate of change of load; [if d]＜d _i≤ 1.05[d], the rate of change of control generator set main main steam temperature and the rate of change of load are 0; If 1.05[d]＜d _i≤ 1.25[d], give the alarm tripping grinder after 30 minutes; If d _i＞1.25[d], give the alarm tripping grinder after 1 minute; At d _v＞0.8[d _v] under the situation, send warning;

The 6th step: computing unit generator set main vitals residue low-cycle fatigue life y _Rlni

The technician of maintenance department user side browser sends instruction by web page server (5) to calculated/applied server (1), calculated/applied server (1) reads the needed accumulative total number of starts and accumulative total load change number of times from database server (2), utilize the cold conditions start and stop life-span N of the generator set main vitals that calculated in advance draws in the Life Calculation software in the calculated/applied server (1) _Fc, warm attitude start and stop life-span N _Fw, hot start and stop life-span N _Fh, very hot attitude start and stop life-span N _Fr, big load change life-span N _F1, middle load change life-span N _F2With little load change life-span N _F3And average annual low-cycle fatigue life loss speed e _N, the low-cycle fatigue residual life y of calculating generator group main frame low pressure rotor, drum, steam-water separator, low temperature collection case and Low Temperature Steam pipeline _RlniFor

$y_{r\ln i}=(D_{\mathrm{Ni}}-E_{\mathrm{Ni}})/e_{\mathrm{Ni}}$

$=[D_{\mathrm{Ni}}-(\frac{n_c}{N_{\mathrm{fc}}}+\frac{n_w}{N_{\mathrm{fw}}}+\frac{n_h}{N_{\mathrm{fh}}}+\frac{n_r}{N_{\mathrm{fr}}}+\frac{n_1}{N_{f1}}+\frac{n_2}{N_{f2}}+\frac{n_3}{N_{f3}})\&times;100\%]/e_{\mathrm{Ni}}$

In the formula, D _NiBe the desired value of loss entire life of generator set main vitals, according to the experience of being engaged in the accumulation of genset life-span management for many years, definition D _NiSpan be D _Ni=75%-100%;

The 7th step: computing unit generator set main vitals residue y creep life _Rlti

The technician of maintenance department user side browser sends instruction by web page server (5) to calculated/applied server (1), and calculated/applied server (1) reads the accumulative total hours worked τ of needed high-temperature component at each temperature section from database _j, utilize design load τ creep life of the corresponding different temperatures section class mean that calculated in advance draws in the Life Calculation software in the calculated/applied server (1) _RjAnd average annual creep life loss velocity e _Ti, residue y creep life of calculating boiler reheater pipe and superheater pipe _RltiFor

$y_{\mathrm{rlti}}=(D_{\mathrm{ti}}-E_{\mathrm{ti}})/e_{\mathrm{ti}}=(D_{\mathrm{ti}}-\left(\mathrm{\&Sigma;}\frac{{\mathrm{\&tau;}}_j}{{\mathrm{\&tau;}}_{\mathrm{Rj}}}\right)\&times;100\%)/e_{\mathrm{ti}}$

In the formula, D _TiBe the desired value of the total creep life consumption of generator set main vitals, according to the experience of being engaged in the accumulation of genset life-span management for many years, definition D _TiSpan be D _Ti=75%-100%;

The 8th step: the residual life of computing unit generator set main vitals under creep and low-cycle fatigue acting in conjunction

Adopt prior art, the accumulation low-cycle fatigue life loss E of online calculating generator group high-temperature component _Ni, accumulation creep life consumption E _TiWith average annual life consumption speed e _Yi, the residual life y of the high pressure rotor of genset, high-pressure inner cylinder, middle pressure inner casing, high pressure main stop valve valve casing, middle pressure stop valve valve casing, high temperature collection case, high-temperature pipe _RlntiFor

y _rlnti＝(D-E _Ni-E _ti)/e _yi

In the formula, D is the desired value of loss entire life of generator set main vitals, according to the experience of being engaged in the accumulation of genset life-span management for many years, and definition D=100%;

The 9th step: the residual life y of computing unit generator set main vitals under low-cycle fatigue and the tired acting in conjunction of torsional oscillation _Rlnvi

Adopt prior art, calculating generator rotor accumulation low-cycle fatigue life loss E _Ni, accumulation torsional oscillation loss fatigue lifetime E _ViWith average annual life consumption rate e _Zi, the residual life y of generator amature _RlnviFor

y _rlnvi＝(D-E _Ni-E _vi)/e _zi

The tenth step: the residual life y of computing unit generator set main vitals under corrosion and wearing and tearing acting in conjunction _Rlai

In database, read the wall-thickness measurement δ of pipe, utilize the data of Life Calculation software design in the calculated/applied server (1), comprise pipe original wall thickness δ ₀, pipe original outer diameter D ₀, the creep limit σ of steel under serviceability temperature _c, pipe internal pressure P, the cigarette side corrosion of boiler water wall pipe and economizer pipe and the residual life y under the abrasive action _RlaiFor:

$y_{\mathrm{rlai}}=\frac{\mathrm{\&delta;}({2\mathrm{\&sigma;}}_c-P)-P(D_0-2{\mathrm{\&delta;}}_0)}{v({2\mathrm{\&sigma;}}_c-P)}$

In the formula, v=(δ ₁-δ ₀)/S _H1, δ ₁Be the wall thickness of last time measurement, S _H1For recording δ ₁And δ ₀Between the accumulative total hours of operation;

The 11 step: the residue insulation life y of calculating generator group main frame vitals _Rlwi

At the accumulative total hours worked τ of line computation winding in each voltage section _EjWith accumulative total τ hours worked at each temperature section _Hj, utilize the winding insulation electricity aging life-span t of the different voltages of the pre-determined correspondence of life-span planning software in the calculated/applied server (1) _EjWinding insulation thermal lifetime t with corresponding different operating temperature _HjAnd average annual insulation ag(e)ing life consumption e _Wi, the insulation ag(e)ing life-span y of generator unit stator winding and main-transformer winding _RlwiFor:

$y_{\mathrm{rlwi}}=(D_w-\mathrm{\&Sigma;}\frac{{\mathrm{\&tau;}}_{\mathrm{ej}}}{t_{\mathrm{ej}}}-\mathrm{\&Sigma;}\frac{{\mathrm{\&tau;}}_{\mathrm{hj}}}{t_{\mathrm{hj}}})/e_{\mathrm{wi}}$

In the formula, D _wBe winding loss entire life, according to the experience of being engaged in the accumulation of genset life-span management for many years, definition D _w=100%;

The 12 step: the recommendation unit genset is optimized maintenance measure

Residual life y according to each vitals of generator set main _Rlxi(y _Rlni, or y _Rlti, or y _Rlnti, or y _Rlnvi, or y _Rlnai, or y _Rlnwi) predict the outcome, recommend the optimization maintenance measure of generator set main in the scheduled overhaul to be:

1.y _Rlxi＜1.5 years, suggestion year interior scheme of arrangement maintenance was overhauled or is changed;

2.1.5 year≤y _Rlxi＜4.5 years, advise after 1 year but scheme of arrangement maintenance in 4 years is overhauled or changed;

3.4.5 year≤y _Rlxi＜8.5 years, advise next time in the scheduled overhaul mechanical part being given detailed defect detecting test, to the winding insulation design test that wears out;

4.y _Rlxi〉=8.5 years, the scheduled overhaul cycle and the scheduled overhaul project of elementary generator group arranged in suggestion according to power plant's " electricity power enterprise's overhaul of the equipments guide rule ";

The 13 step: print result

Output and print unit generator set main vitals transient state life consumption d _iAnd d _vOn-line monitoring result and the elementary generator group optimization operation suggestion that is proposed, and elementary generator group main frame vitals residual life y _RlxiThe optimization maintenance measure that predicts the outcome and recommend.

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