CN103498706A - Turboset performance monitoring and diagnosing method based on general logic table - Google Patents
Turboset performance monitoring and diagnosing method based on general logic table Download PDFInfo
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Abstract
The invention discloses a turboset performance monitoring and diagnosing method based on a general logic table. According to the turboset performance monitoring and diagnosing method, the fault diagnosis general logic table is constructed based on a fault diagnosis flow chart of a turboset, and then the fault diagnosis general logic table is used as a basis. By means of the turboset performance monitoring and diagnosing method based on the general logic table, factors affecting heat economy of the turboset can be found out accurately, the content of the fault diagnosis general logic table can be improved constantly according to actual operation experience, a diagnosis module source program does not need to be modified, and therefore the turboset performance monitoring and diagnosing method has the advantages of being flexible and convenient to use, and high in universality.
Description
Technical field
The invention belongs to thermal power generation and nuclear energy power generation technical field, be specifically related to a kind of Steam Turbine Performance monitoring, diagnosing method based on the generic logic form.
Background technique
The existing Steam Turbine Performance monitoring system of thermal power plant is the affect size of the calculating parameter value of departing from objectives on the unit heat economy index quantitatively, and the measured value that provides monitoring parameter increases with respect to the deviation of desired value and the coal consumption caused by deviation, but but can't point out the reason that monitoring parameter departs from, also can't find the equipment gone wrong.So, although existing Steam Turbine Performance monitoring system is widely used in the large-scale thermal power machine group, can only monitor unit real time execution situation and economic index, also can't realize diagnostic function.
Be limited at present Stateful Inspection and the fault diagnosis of rotating machinery for the fault diagnosis technology of thermal power plant more, for the monitoring and diagnosis of Turbo-generator Set Vibration signal, be not applicable to the diagnostic method of Turbo-generator Set performance monitoring, can't meet the actual demand of electrical production.
Summary of the invention
The deficiency existed for prior art, the invention provides a kind of flexible, highly versatile, can quick and precisely find the Steam Turbine Performance monitoring, diagnosing method based on the generic logic form of failure cause.
In order to solve the problems of the technologies described above, the present invention adopts following technological scheme:
A kind of Steam Turbine Performance monitoring, diagnosing method based on the generic logic form comprises step:
One, build fault diagnosis generic logic form based on Troubleshooting Flowchart, further comprise step:
1.1, according to Turbo-generator Set aufbauprinciple and practical operating experiences, adopt FTA to draw Troubleshooting Flowchart corresponding to diagnostic task;
1.2 build fault diagnosis generic logic form corresponding to diagnostic task according to Troubleshooting Flowchart, described fault diagnosis generic logic form has been contained the monitoring parameter information relevant to diagnostic task, and described monitoring parameter information comprises diagnosis whereabouts and the diagnosis after the required relevant parameter information of diagnostic monitoring parameter, the diagnosis of current monitoring parameter; Described diagnostic monitoring parameter specifically refers to: obtain monitoring parameter and the actual deviation that should reach value, and compare monitoring parameter and should reach the actual deviation of value and the size of this monitoring parameter permissible error; Diagnosis whereabouts after described current monitoring parameter diagnosis is specially: position or the end diagnosis of next monitoring parameter to be diagnosed in fault diagnosis generic logic form;
Two, carry out the Steam Turbine Performance monitoring, diagnosing based on fault diagnosis generic logic form:
2.1 call corresponding fault diagnosis generic logic form according to diagnostic task, and read in the numerical value of the required relevant parameter of diagnostic monitoring parameter in fault diagnosis generic logic form;
2.2 the numerical value of required relevant parameter item is diagnosed current monitoring parameter according to diagnostic monitoring parameter in fault diagnosis generic logic form, and obtain current monitoring parameter and should reach the actual deviation of value, if actual deviation surpasses allowed band, export corresponding diagnosis, no matter whether actual deviation surpasses allowed band, all perform step 2.3;
2.3 according to current monitoring parameter with should reach the actual deviation of value and the size of permissible error, obtain corresponding diagnosis whereabouts from fault diagnosis generic logic form, if the diagnosis whereabouts is the position of next monitoring parameter to be diagnosed in fault diagnosis generic logic form, according to the diagnosis whereabouts, obtain the relevant information of next monitoring parameter to be diagnosed, and, using next monitoring parameter to be diagnosed as current monitoring parameter, perform step 2.2; If the diagnosis whereabouts, for finishing diagnosis, finishes diagnosis.
Above-mentioned fault diagnosis generic logic form concrete form is as follows:
Fault diagnosis generic logic form line number is fixed, and columns can increase or reduce according to actual conditions; The monitoring parameter relevant to diagnostic task lays respectively at fault diagnosis generic logic form different lines, each row have been contained current monitoring parameter information, specifically comprise current monitoring parameter title, diagnose diagnosis whereabouts and diagnosis after the required relevant parameter of current monitoring parameter and corresponding coefficient, the current monitoring parameter of each relevant parameter are diagnosed;
The numerical value of the relevant parameter that the current monitoring parameter of described diagnosis is required is by manually inserting or adopt the Steam Turbine Performance monitoring system to obtain online;
Required coefficient corresponding to relevant parameter of the current monitoring parameter of described diagnosis manually inserted the corresponding position of fault diagnosis generic logic form after setting according to actual conditions;
Diagnosis whereabouts and the diagnosis Troubleshooting Flowchart corresponding according to diagnostic task after current monitoring parameter diagnosis are inserted.
Be provided with 5 relevant parameter and corresponding coefficients thereof that the current monitoring parameter of diagnosis is required in above-mentioned fault diagnosis generic logic form, relevant parameter is expressed as: A, B, C, D, E, the coefficient that each relevant parameter is corresponding is a, b, c, d, e, according to actual conditions corresponding position of relevant parameter A～E and coefficient a～e in fault diagnosis generic logic form, partly or entirely inserts corresponding numerical value.
The present invention adopts formula (1) to judge whether current monitoring parameter and the actual deviation that should reach value surpass permissible error:
Wherein,
(A*a+B*b+C*c+D*d) actual deviation that/(E*e) means current monitoring parameter, Δ * δ means the permissible error of current monitoring parameter;
The numerical value that A, B, C, D, E are the required relevant parameter of the current monitoring parameter of diagnosis;
A, b, c, d, e are respectively parameter A, B, C, coefficient that D, E are corresponding;
Δ is permissible error, and δ is the coefficient that Δ is corresponding;
For different monitoring parameters,
for ">", ">=", "=", "≤" or "<";
A, B, C, D, E, a, b, c, d, e, Δ, δ all from fault diagnosis generic logic form corresponding position obtain, if in fault diagnosis generic logic form relevant parameter A, B, C and D, some relevant parameter corresponding position is not filled in numerical value, the numerical value of this relevant parameter is made as to 0, simultaneously, the coefficient that this relevant parameter is corresponding also is set as 0, and then substitution formula (1) is calculated; If fault diagnosis generic logic form relevant parameter E corresponding position is not filled in numerical value, the numerical value of relevant parameter E is made as to 1, simultaneously, the coefficient e that relevant parameter E is corresponding also is set as 1, and then substitution formula (1) is calculated.
Based on the above-mentioned Steam Turbine Performance monitoring, diagnosing method based on the generic logic form, the present invention also provides a kind of Steam Turbine Performance monitoring system that realizes the Vibration fault diagnosis of steam turbine generating function, this Steam Turbine Performance monitoring system is on the prior art basis, also comprise the diagnostic module based on fault diagnosis generic logic form, described diagnostic module further comprises that diagnostic task generation module, data read in module, diagnostic analysis module and diagnosis output module, wherein:
The diagnostic task generation module is used for generating diagnostic task according to the on-line performance monitoring result of steam turbine set, or generates diagnostic task by artificial selection;
Data are read in module and are used for the monitoring parameter information relevant to diagnostic task is automatically read in and/or manually inserted the corresponding position of fault diagnosis generic logic form;
The diagnostic analysis module is used for carrying out analyzing and diagnosing according to the monitoring parameter information relevant to diagnostic task in fault diagnosis generic logic form, and obtains diagnosis;
The diagnosis output module is used for exporting diagnosis.
The present invention proposes the fault diagnosis generic logic form that a kind of Troubleshooting Flowchart based on steam turbine set builds, and take this fault diagnosis generic logic form as basis, proposed a kind of Steam Turbine Performance monitoring, diagnosing method.The inventive method can accurately be found out the factor that affects unit heat economy, and can constantly improve fault diagnosis generic logic table content according to practical operating experiences, needn't revise the diagnostic module source program, therefore, has characteristics flexible, highly versatile.
Steam Turbine Performance monitoring system of the present invention has realized the Vibration fault diagnosis of steam turbine generating function, has filled up the blank of existing Steam Turbine Performance monitoring system on the Vibration fault diagnosis of steam turbine generating function.
The accompanying drawing explanation
Fig. 1 is the Troubleshooting Flowchart built based on FTA;
Fig. 2 is that the diagnostic module function realizes schematic diagram;
A kind of concrete implementing procedure figure that Fig. 3 is the inventive method;
Fig. 4 is the high-pressure heater schematic diagram;
The feed temperature Troubleshooting Flowchart that Fig. 5 is embodiment 1;
Embodiment
The inventive method be take FTA as basis, adopts FTA to build Troubleshooting Flowchart to the main monitoring parameter that affects the steam turbine set heat-economy, based on Troubleshooting Flowchart, sets up corresponding fault diagnosis generic logic form.Fault diagnosis generic logic table content contains the required relevant parameter of diagnosis and the reason of main monitoring parameter value of departing from objectives, utilize the monitoring parameter deviation to calculate general formula and judge that whether depart from reason sets up, and realizes the Vibration fault diagnosis of steam turbine generating overall process by the redirect between the different units lattice.
The key of the inventive method is that the Troubleshooting Flowchart of the steam turbine set that will build based on FTA is converted into fault diagnosis generic logic form, and the Rule of judgment in Troubleshooting Flowchart and diagnosis are inserted in fault diagnosis generic logic form according to logical order.In fault diagnosis generic logic form, Rule of judgment is refined as each monitoring parameter, and calculate general formula by the monitoring parameter deviation and determine whether the monitoring parameter deviation relevant to diagnostic task meets conditions for diagnostics, the different whereabouts whether conditions for diagnostics is set up realize by the redirect between the different units lattice.
Based on Troubleshooting Flowchart diagnosis steam turbine set fault, need to draw different Troubleshooting Flowcharts, complicated operation for different diagnostic tasks.The fault diagnosis generic logic form basic framework that the present invention proposes is identical, only need to increase or reduce Rule of judgment according to the different faults diagnostic flow chart, and upgrade the monitoring parameter in the diagnosis logic form of general use, then the related parameter values based in fault diagnosis generic logic form, each monitoring parameter is corresponding is carried out fault diagnosis.
According to equipment aufbauprinciple and the practical operating experiences of Turbo-generator Set, adopt FTA to draw Troubleshooting Flowchart corresponding to diagnostic task, the concrete form of Troubleshooting Flowchart is shown in Fig. 1.For example, obtain monitoring parameter X according to the Steam Turbine Performance monitoring system and depart from and should reach the coal consumption that value causes and increase over allowed band, start to diagnose.At first, whether the deviation that judges monitoring parameter X and should reach value, over allowed band, does not surpass, and explain deviations still, in allowed band, does not belong to failure problems, finishes diagnosis; If surpass, there is failure problems in explanation, continues to judge whether the relevant parameter of monitoring parameter X and the deviation that should reach value surpass allowed band.Whether surpass allowed band failure judgement reason according to the deviation of relevant parameter, thereby realize the diagnosis of Turbo-generator Set performance on-line monitoring.
Build the basic boom of fault diagnosis generic logic form according to the common form of Troubleshooting Flowchart, in Table 1.The line number of fault diagnosis generic logic form is fixed, and in this concrete enforcement, line number is set to 28 row, and columns can be increased and decreased according to concrete diagnostic task.In fault diagnosis generic logic form, " Rule of judgment " of the 1st row refers to the monitoring parameter relevant to diagnostic task, for example, and feed temperature, Heater Terminal Temperature Difference, heater water level etc.
" whether judging " of the 2nd row refers to the monitoring parameter and the corresponding deviation that should reach value that whether quantitatively calculates the 1st row, adopts " 1 " to mean "Yes", " quantitatively calculates monitoring parameter and the corresponding deviation that should reach value "; Adopt " 0 " to mean "No", " do not calculate monitoring parameter and the corresponding deviation that should reach value ".
The monitoring parameter deviation of employing formula (1) is calculated general formula and is judged whether the 1st row monitoring parameter surpasses permissible error with the corresponding deviation that should reach value:
Formula (1) left side (A*a+B*b+C*c+D*d)/(E*e) means the actual deviation of monitoring parameter, the right Δ * δ means the permissible error of monitoring parameter, formula (1) is used for judging whether the actual deviation of monitoring parameter surpasses allowed band, for different monitoring parameters
for ">", ">=", "=", "≤" or "<".
3rd～17 row of fault diagnosis generic logic form provide and calculate the 1st row monitoring parameter and corresponding title, period and the numerical value that should reach the needed relevant parameter of value deviation, and A, the B in formula (1), C, D, E be the numerical value of 3rd～17 each relevant parameters of row of corresponding fault diagnosis generic logic form respectively.If some parameter in fault diagnosis generic logic form in parameter A, B, C and D is not inserted corresponding numerical value, the numerical value that will not insert the parameter of numerical value is made as 0, simultaneously, after coefficient corresponding to parameter that will not insert numerical value also is set as 0, then substitution formula (1) is calculated.If in fault diagnosis generic logic form, parameter E does not insert corresponding numerical value, parameter E is made as to 1, simultaneously, the coefficient e that parameter E is corresponding also is set as 1, and then substitution formula (1) is calculated.
Table 1 fault diagnosis generic logic form
3rd～17 of fault diagnosis generic logic form is calculating the 1st row monitoring parameter and corresponding title, period and the numerical value that should reach the needed relevant parameter of value deviation, period, in order to indicate the stored position of numerical value in database of relevant parameter item correspondence, can read according to period the numerical value that parameter item is corresponding from database.
18th～24 row have provided corresponding coefficient value and the permissible error value Δ of each parameter in formula (1), these numerical value are all to set according to actual conditions, a, b, c, d, e, the general value of δ coefficient are 1 ,-1 or 0, and the permissible error Δ has difference according to the monitoring parameter of the first row.It is to calculate the versatility of general formula (1) in order to improve the monitoring parameter deviation that above-mentioned coefficient is set.
" formula 1 relational symbol " of the 25th row is the oeprator in formula (1)
adopt " 0 ", " 1 ", " 2 ", " 3 ", " 4 " to mean respectively ">", ">=", "=", "≤", "<".
" the diagnosis whereabouts " of 26th～27 row refers to whether formula (1) is set up and can point to different row, by the row sequence number, means to diagnose whereabouts, determines the monitoring parameter of next step diagnosis according to the diagnosis whereabouts.
" the YES conclusion " of the 28th row refers to the diagnosis that formula (1) obtains while setting up.
The inventive method at first logical relation based on conditions for diagnostics in Troubleshooting Flowchart and diagnosis builds fault diagnosis generic logic form basic framework; Then, according to concrete diagnostic task, the related parameter values of monitoring parameter that will be relevant to diagnostic task, diagnosis whereabouts and diagnosis are inserted the corresponding position of fault diagnosis generic logic form; Finally by the related parameter values that reads each monitoring parameter in analysis of failure diagnosis generic logic form, obtain diagnosis whereabouts and diagnosis, and based on diagnosing whereabouts to complete the overall process of Steam Turbine Performance monitoring, diagnosing, thereby obtain the reason that causes unit economy to reduce.
The realization of the inventive method is to take the Steam Turbine Performance monitoring system as basis, and fault diagnosis generic logic form according to the present invention can be developed the diagnostic module of Steam Turbine Performance monitoring system.When needs are diagnosed, the Steam Turbine Performance monitoring system triggers diagnostic module, generates diagnostic task, and obtains corresponding fault diagnosis generic logic form according to diagnostic task; The relevant parameter item value of each monitoring parameter that will be relevant to diagnostic task is read in the relevant position of fault diagnosis generic logic form; The related parameter values that reads and analyze each monitoring parameter obtains diagnosis output.Therefore, above-mentioned diagnostic module further comprises that submodule diagnostic task generation module, data read in module, diagnostic analysis module, diagnosis output module, sees Fig. 3.
The diagnosis mould further is included in radiodiagnosis x module and off-line diagnostic module, and the inline diagnosis module generates diagnostic task according to the on-line performance monitoring result of steam turbine set; The off-line diagnostic module is to generate diagnostic task by artificial selection.The inline diagnosis module is diagnosed occurent dispersed parameters, ageing strong; The off-line diagnostic module is diagnosed historical dispersed parameters, can be used for the query history problem, is independent of the on-line performance monitoring system, therefore also can be used for system debug, staffs training etc.
The fault diagnosis generic logic form shown in table 1 of below take is example, describes a kind of specific implementation method of the present invention in detail, and flow chart is shown in Fig. 3, and concrete steps are as follows:
(1) by Steam Turbine Performance monitoring system Real-Time Monitoring Steam Turbine Performance, according to monitored data, judge whether to be diagnosed, generate as the case may be diagnostic task when needs are diagnosed.
(2) call the fault diagnosis generic logic form corresponding with diagnostic task according to diagnostic task, and, according to the period of the parameter of 3rd～17 correspondences in fault diagnosis generic logic form, read corresponding parameter values and insert corresponding position from the database of Steam Turbine Performance monitoring system.
(3) read failure diagnosis generic logic form n row content, if this row content is empty, finish diagnosis, and row sequence number n initial value is 1;
(4) obtain n and be listed as the numerical value whether the 2nd row " judges " correspondence, if " 0 " is not diagnosed this row monitoring parameter, directly made row sequence number n for numerical value corresponding to these row " NO whereabouts ", execution step (3); If " 1 ", diagnosed n row monitoring parameter, be specially:
Parameter A in 4-1 read failure diagnosis generic logic form n row, B, C, D, E value, deviation delta value, reach a, b, c, d, e, δ coefficient value, calculate actual deviation (A*a+B*b+C*c+D*d)/(E*e) and the permissible error Δ * δ size of n row monitoring parameter, according to actual deviation and general formula corresponding to permissible error size this row monitoring parameter of judgement
whether set up, wherein,
for ">", ">=", "=", "≤" or "<", artificially set and insert " formula 1 relational symbol " according to monitoring parameter.
If 4-2 general formula
set up, the diagnosis that these row in output formats " YES conclusion " are corresponding, then, make row sequence number n for numerical value corresponding to these row " YES whereabouts ", execution step (3); If general formula
be false, make row sequence number n for numerical value corresponding to these row " NO whereabouts ", same execution step (3).
The feed temperature of steam turbine set of below take hangs down as example and further illustrates the inventive method.
Feed temperature is on the low side refers to #1 high-pressure heater outlet water temperature tg
1the (see figure 4) measured value surpasses allowed band lower than desired value and with the desired value deviation.According to the Turbo-generator Set equipment characteristic and in conjunction with practical operating experiences, known cause main cause that feed temperature is low to have high-pressure heater excision, #1 high-pressure heater to draw gas crushing increases, #1 high-pressure heater water level raises and other possible causes.So the relevant monitoring parameter that need to judge when feed temperature is on the low side comprises #1 high-pressure heater outlet water temperature tg
1with water temperature tg after feed water pump
4difference, the #1 high-pressure heater height of water level in crushing, #1 high-pressure heater that draws gas.Distinguish again corresponding different reasons during above-mentioned relevant monitoring parameter generation deviation, the parameter that some can not be definite according to measuring point in addition in addition, it departs from reason and is referred to as other possible causes.
According to relevant parameter and depart from the logical relation of reason, draw the feed temperature diagnostic flow chart based on FTA, see Fig. 5.Determine that according to the data of Turbo-generator Set on-line performance monitoring system feed temperature is on the low side, at first judge #1 high-pressure heater outlet water temperature tg
1with water temperature tg after feed water pump
4difference whether be less than or equal to permitted value, if, diagnostic result be height add excise and finish the diagnosis; If not, continue to judge whether the high crushing that draws gas that adds of #1 is more than or equal to permitted value.Judge whether the high crushing that draws gas that adds of #1 is more than or equal to permitted value, if, obtain diagnosis, then, continue to judge in the #1 high-pressure heater, whether height of water level is more than or equal to permitted value; If not, still continue to judge in the #1 high-pressure heater, whether height of water level is more than or equal to permitted value.Judge in the #1 high-pressure heater, whether height of water level is more than or equal to permitted value, if obtain diagnostic result, and continue the judgement other reasons; If not, judgement other reasons.After completing the other reasons judgement, export all diagnosises.
At the on the low side but #1 high-pressure heater of feed temperature outlet water temperature tg
1with water temperature tg after feed water pump
4difference not be less than in the situation of permitted value, #1 is high, and the crushing increase of drawing gas, the rising of #1 Gao Jianei water level and other possible causes of other of adding likely exist simultaneously, so in this case, no matter whether other Rule of judgment are set up, all need to judge one by one high draw gas crushing increase, the rising of #1 Gao Jianei water level and three failure causes of other possible causes of adding of #1.
The fault diagnosis generic logic form corresponding with the feed temperature diagnostic flow chart is in Table 2, and in table 2, the parameter value of the 5th row, eighth row, the 17th row reads in from the database of Steam Turbine Performance monitoring system; The coefficient value of 18th～20 row and the 24th row is manually inserted according to actual conditions; Numerical value corresponding to the 25th row " formula 1 relational symbol " according to current monitoring parameter from " > ", selected " >=", "=", "≤" and "<"; " judgement whereabouts " and " the YES conclusion " of 26th～28 row are inserted according to the feed temperature diagnostic flow chart.Pressure unit in table 2 is MPa, and temperature unit is ℃ that water level unit is mm.
Table 2 feed temperature generic logic form
The diagnostic procedure of the feed temperature generic logic form based on table 2 is as follows:
Step 1, whether the 1st is listed as the 2nd row " judges " to be " 1 ", this row monitoring parameter " feed temperature " is diagnosed.Be listed as actual deviation and the permissible error of the numerical calculation monitoring parameter " feed temperature " of the 5th, 8,18～20,24 row according to this, actual deviation (A*a+B*b+C*c+D*d)/(E*e)=(300*1+230*(-1)+0+0)/(1*1)=70, permissible error Δ * δ=5*1=5.This symbol that is listed as that the 25th row " formula (1) relational symbol " is corresponding is " >=", it is (A*a+B*b+C*c+D*d)/(E*e) >=Δ * δ that the monitoring parameter deviation that monitoring parameter " feed temperature " is corresponding is calculated general formula (1), the actual deviation of this monitoring parameter and permissible error meet formula (1), formula (1) is set up, export the diagnostic result provided in these row " YES conclusion ", then, according to " YES whereabouts " indication columns 2 in the 1st row, diagnose the height of the 2nd row to add excision.
Step 3, with step 1, according to the 3rd actual deviation and the permissible error that is listed as the numerical calculation monitoring parameter " the high crushing that draws gas that adds of #1 " of the 5th, 8,17～20,23～24 row, actual deviation (A*a+B*b+C*c+D*d)/(E*e)=(8.476*1+7.3*(-1)+0+0)/(8.476*1)=0.139, permissible error Δ * δ=0.05*1=0.05.This symbol that is listed as that the 25th row " formula (1) relational symbol " is corresponding is " >=", it is (A*a+B*b+C*c+D*d)/(E*e) >=Δ * δ that the monitoring parameter deviation that monitoring parameter " the high crushing that draws gas that adds of #1 " is corresponding is calculated general formula (1), the actual deviation of this monitoring parameter and permissible error are not inconsistent box-like (1), formula (1) is set up, export the diagnostic result provided in these row " YES conclusion ", then, according to " YES whereabouts " indication columns 4 in these row, diagnose the high water level that adds of #1 of the 4th row;
Step 4, with step 1, according to the 4th actual deviation and the permissible error that is listed as the numerical calculation monitoring parameter " the high water level that adds of #1 " of the 5th, 8,18～20,24 row, actual deviation (A*a+B*b+C*c+D*d)/(E*e)=(5*(-1)+6*1+0+0)/(1*1)=0.5, permissible error Δ * δ=3*1=3.This symbol that is listed as that the 25th row " formula (1) relational symbol " is corresponding is " >=", it is (A*a+B*b+C*c+D*d)/(E*e) >=Δ * δ that the monitoring parameter deviation that monitoring parameter " the high water level that adds of #1 " is corresponding is calculated general formula (1), the actual deviation of this monitoring parameter and permissible error are not inconsistent box-like (1), formula (1) is false, read the other reasons of the 5th row according to " NO whereabouts " indication columns 5 in these row, whether the 5th row " judging " is " 0 ", do not diagnosed, directly export other Diagnosis of Primaries because of.
Claims (5)
1. the Steam Turbine Performance monitoring, diagnosing method based on the generic logic form, is characterized in that, comprises step:
One, build fault diagnosis generic logic form based on Troubleshooting Flowchart, further comprise step:
1.1, according to Turbo-generator Set aufbauprinciple and practical operating experiences, adopt FTA to draw Troubleshooting Flowchart corresponding to diagnostic task;
1.2 build fault diagnosis generic logic form corresponding to diagnostic task according to Troubleshooting Flowchart, described fault diagnosis generic logic form has been contained the monitoring parameter information relevant to diagnostic task, and described monitoring parameter information comprises diagnosis whereabouts and the diagnosis after the required relevant parameter information of diagnostic monitoring parameter, the diagnosis of current monitoring parameter; Described diagnostic monitoring parameter specifically refers to: obtain monitoring parameter and the actual deviation that should reach value, and compare monitoring parameter and should reach the actual deviation of value and the size of this monitoring parameter permissible error; Diagnosis whereabouts after described current monitoring parameter diagnosis is specially: position or the end diagnosis of next monitoring parameter to be diagnosed in fault diagnosis generic logic form;
Two, carry out the Steam Turbine Performance monitoring, diagnosing based on fault diagnosis generic logic form:
2.1 call corresponding fault diagnosis generic logic form according to diagnostic task, and read in the numerical value of the required relevant parameter of diagnostic monitoring parameter in fault diagnosis generic logic form;
2.2 the numerical value of required relevant parameter is diagnosed current monitoring parameter according to diagnostic monitoring parameter in fault diagnosis generic logic form, and obtain current monitoring parameter and should reach the actual deviation of value, if actual deviation surpasses allowed band, export corresponding diagnosis, no matter whether actual deviation surpasses allowed band, all perform step 2.3;
2.3 according to current monitoring parameter with should reach the actual deviation of value and the size of permissible error, obtain corresponding diagnosis whereabouts from fault diagnosis generic logic form, if the diagnosis whereabouts is the position of next monitoring parameter to be diagnosed in fault diagnosis generic logic form, according to the diagnosis whereabouts, obtain the relevant information of next monitoring parameter to be diagnosed, and, using next monitoring parameter to be diagnosed as current monitoring parameter, perform step 2.2; If the diagnosis whereabouts, for finishing diagnosis, finishes diagnosis.
2. the Steam Turbine Performance monitoring, diagnosing method based on the generic logic form as claimed in claim 1 is characterized in that:
Described fault diagnosis generic logic form concrete form is as follows:
Fault diagnosis generic logic form line number is fixed, and columns can increase or reduce according to actual conditions; The monitoring parameter relevant to diagnostic task lays respectively at fault diagnosis generic logic form different lines, each row have been contained current monitoring parameter information, specifically comprise current monitoring parameter title, diagnose diagnosis whereabouts and diagnosis after the required relevant parameter of current monitoring parameter and corresponding coefficient, the current monitoring parameter of each relevant parameter are diagnosed;
The numerical value of the relevant parameter that the current monitoring parameter of described diagnosis is required is by manually inserting or adopt the Steam Turbine Performance monitoring system to obtain online;
Required coefficient corresponding to relevant parameter of the current monitoring parameter of described diagnosis manually inserted the corresponding position of fault diagnosis generic logic form after setting according to actual conditions;
Diagnosis whereabouts and the diagnosis Troubleshooting Flowchart corresponding according to diagnostic task after current monitoring parameter diagnosis are inserted.
3. the Steam Turbine Performance monitoring, diagnosing method based on the generic logic form as claimed in claim 2 is characterized in that:
Be provided with 5 relevant parameter and corresponding coefficients thereof that the current monitoring parameter of diagnosis is required in described fault diagnosis generic logic form, relevant parameter is expressed as: A, B, C, D, E, the coefficient that each relevant parameter is corresponding is a, b, c, d, e, according to actual conditions corresponding position of relevant parameter item A～E and coefficient a～e in fault diagnosis generic logic form, partly or entirely inserts corresponding numerical value.
4. the Steam Turbine Performance monitoring, diagnosing method based on the generic logic form as claimed in claim 3 is characterized in that:
Employing formula (1) judges whether current monitoring parameter and the actual deviation that should reach value surpass permissible error:
Wherein,
(A*a+B*b+C*c+D*d) actual deviation that/(E*e) means current monitoring parameter, Δ * δ means the permissible error of current monitoring parameter;
The numerical value that A, B, C, D, E are the required relevant parameter of the current monitoring parameter of diagnosis;
A, b, c, d, e are respectively parameter A, B, C, coefficient that D, E are corresponding;
Δ is permissible error, and δ is the coefficient that Δ is corresponding;
For different monitoring parameters,
for ">", ">=", "=", "≤" or "<";
A, B, C, D, E, a, b, c, d, e, Δ, δ all from fault diagnosis generic logic form corresponding position obtain, if in fault diagnosis generic logic form relevant parameter A, B, C and D, some relevant parameter corresponding position is not filled in numerical value, the numerical value of this relevant parameter is made as to 0, simultaneously, the coefficient that this relevant parameter is corresponding also is set as 0, and then substitution formula (1) is calculated; If fault diagnosis generic logic form relevant parameter E corresponding position is not filled in numerical value, the numerical value of relevant parameter E is made as to 1, simultaneously, the coefficient e that relevant parameter E is corresponding also is set as 1, and then substitution formula (1) is calculated.
5. a Steam Turbine Performance monitoring system, it is characterized in that: comprise the diagnostic module based on fault diagnosis generic logic form, described diagnostic module further comprises that diagnostic task generation module, data read in module, diagnostic analysis module and diagnosis output module, wherein:
The diagnostic task generation module is used for generating diagnostic task according to the on-line performance monitoring result of steam turbine set, or generates diagnostic task by artificial selection;
Data are read in module and are used for the monitoring parameter information relevant to diagnostic task is automatically read in and/or manually inserted the corresponding position of fault diagnosis generic logic form;
The diagnostic analysis module is used for carrying out analyzing and diagnosing according to the monitoring parameter information relevant to diagnostic task in fault diagnosis generic logic form, and obtains diagnosis;
The diagnosis output module is used for exporting diagnosis.
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Cited By (5)
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| CN106289754A (en) * | 2016-09-28 | 2017-01-04 | 清华大学 | A kind of fired power generating unit component capabilities based on Statistical Control Technique change decision method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106295203A (en) * | 2016-08-15 | 2017-01-04 | 上海交通大学 | The unit heat economy online evaluation method that value calculates in real time should be reached based on upper end difference |
| CN106295203B (en) * | 2016-08-15 | 2020-01-07 | 上海交通大学 | Online evaluation method for thermal economy of unit based on real-time calculation of upper-end difference answer value |
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| CN109915218A (en) * | 2019-03-07 | 2019-06-21 | 东方电气自动控制工程有限公司 | A kind of electro-hydraulic converting member fault diagnosis system of DEH system |
| CN109915218B (en) * | 2019-03-07 | 2021-09-03 | 东方电气自动控制工程有限公司 | DEH system electrohydraulic conversion part fault diagnosis system |
| CN111445105A (en) * | 2020-02-28 | 2020-07-24 | 山东电力工程咨询院有限公司 | Power plant online performance diagnosis method and system based on target value analysis |
| CN111445105B (en) * | 2020-02-28 | 2023-07-14 | 山东电力工程咨询院有限公司 | Power plant online performance diagnosis method and system based on target value analysis |
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