CN109298700A - A kind of method and system of real-time judge thermal power unit operation abnormal parameters variation - Google Patents
A kind of method and system of real-time judge thermal power unit operation abnormal parameters variation Download PDFInfo
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
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Abstract
The invention discloses a kind of method and system of real-time judge thermal power unit operation abnormal parameters variation, method implementation steps include: the multiple numerical value for obtaining the specified thermal power unit operation parameter in interval between diagnosis；Judge the specified operating parameter whether occur three kinds of situations 1.~3.: 1. situation is mutation；2. situation is to occur being increased continuously or continuously successively decrease；3. situation is unusual fluctuations occur；If there is three kinds of situations 1.~3. in any one, then determine the specified thermal power unit operation abnormal parameters；If three kinds of situations 1.~3. do not occur, determine that the specified thermal power unit operation parameter is normal；System includes the corresponding system of preceding method.Present invention implementation flexibility is stronger, and cost is relatively low for applicating maintenance, realizes warning function, provides effective clue for analysis on accident cause, and the real time execution situation that unit is also more accurately grasped for operations staff provides effective means.
Description
Technical field
The present invention relates to thermal power generation unit operating status Study On Intelligent Monitoring Techniques, and in particular to a kind of real-time judge thermal motor
The method and system of group operating parameter anomalous variation.
Background technique
In recent years, the design of China's fired power generating unit, capital construction, debugging, O&M technology reach its maturity, and energy-saving requirement is increasingly tight
Lattice.The single-machine capacity of thermal power plant constantly increases, and the degree of automation of unit is also continuously improved, and large-scale thermal power machine group has become
Main force's generator of China's power industry.Large capacity monoblock largely put into operation so that power grid structure and operational mode
It has changed a lot, the safe and stable operation of these units has safe and stable, the economical operation of power grid decisive
Influence.High parameter, large capacity fired power generating unit mean more ancillary equipments and measuring point, increase the labour of operations staff
Intensity, while also more risks and hidden danger are brought to the safe and stable operation of unit.By choosing some pairs of unit safeties
Operation has the important parameter of larger impact to carry out real-time monitoring and judging whether it is abnormal variation online, both can and alarm
Occurred with preventing accident, reference can also be provided when analyzing cause of accident, be conducive to the safe operation of monoblock and power grid, together
When more accurately grasp the operating condition of unit for operations staff and provide convenience.
With continuous development information-based and that industrialization depth is warm, Chinese electrical circuitry equipment gradually turns to the intelligent stage
Become.The intelligent operation of fired power generating unit will become new research hotspot.The final purpose of unit intelligent operation is to reduce even to move back
The systematic Intelligent closed-loop control of institute is realized in manual intervention out.The operation shape of its prerequisite adequately diagnosis unit unit
State simultaneously analyzes the reason of state is formed, to provide foundation for intelligent decision.The certain operating parameters of real-time monitoring are simultaneously sentenced online
Breaking, whether it is abnormal variation and can give a clue to analyze the Crack cause of current operating states of the units.
Currently, having furnance safeguard supervisory system in furnace side for the protection system of fired power generating unit, there is steam turbine in pusher side
Urgent interrupting system.The important parameter that both selection jeopardizes equipment safety is monitored, when the monitored big Mr. Yu of parameter is fixed
Alarm or chaser protection act are carried out when value, host equipment can be effectively prevent to damage.It has a disadvantage in that, in alarm or protection act
Before generation, without effective precautionary measures, early warning in advance and corresponding rescue measure can be taken to fully rely on operations staff's
Monitoring, reliability are to be improved.In addition, in thermal power unit boiler combustion state intelligent diagnostics field, current technology is focused
In the current furnace combustion state of evaluation, and lack and the profound level of present combustion state Crack cause is analyzed, from boiler combustion
Closed-loop control still have relatively large distance.
Summary of the invention
The technical problem to be solved in the present invention: in view of the above problems in the prior art, one kind is provided and does not increase cost of equipment
Investment, the method and system for not increasing the cost of overhaul, the variation of accurate and reliable real-time judge thermal power unit operation abnormal parameters, this hair
Bright implementation flexibility is stronger, and cost is relatively low for applicating maintenance, realizes warning function, provides active line for analysis on accident cause
Rope.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows:
A kind of method of real-time judge thermal power unit operation abnormal parameters variation, implementation steps include:
1) multiple numerical value that fired power generating unit specifies operating parameter in interval between diagnosis are obtained；
2) judge specified operating parameter whether occur three kinds of situations 1.~3.: 1. situation is mutation；2. situation is to connect
It is continuous to be incremented by or continuously successively decrease；3. situation is unusual fluctuations occur；If there is three kinds of situations 1.~3. in any one, then sentence
The fixed thermal power unit operation abnormal parameters；If three kinds of situations 1.~3. do not occur, determine the thermal power unit operation parameter
Normally.
The detailed step of step 2 includes:
2.1) judge 1. whether specified operating parameter situation occurs, 1. situation is mutation, 1. if there is situation, then determine
The thermal power unit operation abnormal parameters, are exited；Otherwise it jumps and executes step 2.2)；
2.2) judge 2. whether specified operating parameter situation occurs, 2. situation is to occur being increased continuously or continuously successively decrease, if gone out
2. existing situation, then determines the thermal power unit operation abnormal parameters, exits；Otherwise it jumps and executes step 2.3)；
2.3) judge 3. whether specified operating parameter situation occurs, 3. situation is unusual fluctuations occur, 3. if there is situation, then
Determine the thermal power unit operation abnormal parameters, exits；Otherwise it jumps and executes step 2.4)；
2.4) determine that the thermal power unit operation parameter is normal.
Judging whether specified operating parameter the detailed step of situation 1. occurs in step 2 includes: in interval between diagnosis
N numerical value { x arranging sequentially in time of specified thermal power unit operation parameter0, x1, ……xn, by arbitrary neighborhood two
Numerical value subtract each other and calculate thoroughly deserve consecutive number value difference absolute value sequence | x1-x0|, |x2-x1|, ……|xn-xn-1|, sentence
Disconnected consecutive number value difference absolute value sequence | x1-x0|, |x2-x1|, ……|xn-xn-1| in be greater than preset threshold value element
Whether number is true more than or equal to 1, determines 1. the operational parameter value situation occurs if setting up.
The judgement consecutive number value difference absolute value sequence | x1-x0|, |x2-x1|, ……|xn-xn-1| in be greater than it is preparatory
Whether the element number of given threshold is true more than or equal to 1 to specifically refer to: consecutive number value difference absolute value is calculated by counter
Sequence | x1-x0|, |x2-x1|, ……|xn-xn-1| in be greater than preset threshold value element number, it is every occur one be greater than
The counter is then added 1 by the element of preset threshold value, judges whether the final count value m of counter is true more than or equal to 1, such as
Fruit set up then determine consecutive number value difference absolute value sequence | x1-x0|, |x2-x1|, ……|xn-xn-1| in be greater than preset
The element number of threshold value be more than or equal to 1 set up, otherwise determine consecutive number value difference absolute value sequence | x1-x0|, |x2-x1|,
……|xn-xn-1| in be greater than preset threshold value element number be more than or equal to it is 1 invalid；Into next interval between diagnosis
When, by counter O reset.
Judging whether specified operating parameter the detailed step of situation 2. occurs in step 2 includes: in interval between diagnosis
N numerical value { x arranging sequentially in time of specified thermal power unit operation parameter0, x1, ……xn, obtain sequence of values
{x0, x1, ……xnIn maximum value xmaxWith minimum value xmin, seek maximum value xmaxWith minimum value xminBetween difference xd；
Two elements of arbitrary neighborhood in sequence of values are subtracted each other to obtain adjacent values difference sequence { x1-x0, x2-x1, ……xn-xn-1, if
Adjacent values difference sequence { x1-x0, x2-x1, ……xn-xn-1In whole elements be greater than or equal to 0 and difference xdBig Mr. Yu
Preset threshold value then determines that the specified operational parameter value is increased continuously；If adjacent values difference sequence { x1-x0, x2-x1,
……xn-xn-1In whole elements all less than or be equal to 0 and difference xdThe preset threshold value of big Mr. Yu, then determine that this refers to
Determine operational parameter value continuously to successively decrease；If the specified operational parameter value is increased continuously or continuously successively decreases, the operating parameter is determined
There is situation 2..
Judging whether specified operating parameter the detailed step of situation 3. occurs in step 2 includes: in interval between diagnosis
N numerical value { x arranging sequentially in time of specified thermal power unit operation parameter0, x1, ……xn, obtain sequence of values
{x0, x1, ……xnIn maximum value xmaxWith minimum value xmin, seek maximum value xmaxWith minimum value xminBetween difference xd；
Two operational parameter values of arbitrary neighborhood are subtracted each other to obtain adjacent values difference sequence { x1-x0, x2-x1, ……xn-xn-1, then root
According to adjacent values difference sequence { x1-x0, x2-x1, ……xn-xn-1In element, calculate adjacent element product obtain adjacent member
Plain product sequence { (x1-x0)·(x2-x1) , (x2-x1)·(x3-x2) ,……, (xn-1-xn-2)·(xn-xn-1)}；If phase
Neighbors product sequence { (x1-x0)·(x2-x1) , (x2-x1)·(x3-x2) ,……, (xn-1-xn-2)·(xn-xn-1) small
In or equal to 0 element quantity be greater than or equal to preset threshold and difference xdMore than or equal to preset threshold value, then determine
3. there is situation in the specified operating parameter.
Judge adjacent element product sequence { (x1-x0)·(x2-x1) , (x2-x1)·(x3-x2) ,……, (xn-1-
xn-2)·(xn-xn-1) less than or equal to 0 element quantity be greater than or equal to preset threshold detailed step include: to pass through meter
Device is counted to calculate adjacent element product sequence { (x1-x0)·(x2-x1) , (x2-x1)·(x3-x2) ,……, (xn-1-
xn-2)·(xn-xn-1) less than or equal to 0 element quantity, it is every occur one less than or equal to 0 element then by the counting
Device adds 1, judges that whether the final count value n of counter is true more than or equal to preset threshold, determines adjacent member if setting up
Plain product sequence { (x1-x0)·(x2-x1) , (x2-x1)·(x3-x2) ,……, (xn-1-xn-2)·(xn-xn-1) be less than or
The quantity of element equal to 0 is set up more than or equal to preset threshold；Otherwise determine adjacent element product sequence { (x1-x0)·(x2-
x1) , (x2-x1)·(x3-x2) ,……, (xn-1-xn-2)·(xn-xn-1) less than or equal to 0 element quantity be greater than or
It is invalid equal to preset threshold；When into next interval between diagnosis, by counter O reset.
Judge adjacent element product sequence { (x1-x0)·(x2-x1) , (x2-x1)·(x3-x2) ,……, (xn-1-
xn-2)·(xn-xn-1) less than or equal to 0 element quantity be greater than or equal to preset threshold when, preset threshold value be 3, refer to
Determine thermal power unit operation parameter and arranges sequence of values { x sequentially in time0, x1, ……xnElement number n be not less than 10.
When step 1) obtains multiple numerical value of the specified thermal power unit operation parameter in interval between diagnosis, the length of interval between diagnosis
Degree is 10~45s, and frequency when obtaining the multiple numerical value of specified operating parameter is equal to the operating parameter in data collection system
Frequency acquisition.
The present invention also provides a kind of systems of real-time judge thermal power unit operation abnormal parameters variation, including computer to set
Method standby, that the computer equipment is programmed to perform the aforementioned real-time judge thermal power unit operation abnormal parameters variation of the present invention
The step of.
Compared to the prior art, the present invention has an advantage that
1, flexibility of the present invention is stronger, and application cost is low.It, can be to one or more operating parameters of fired power generating unit depending on actual needs
Monitored, and the real-time judge parameter whether anomalous variation, can directly realize, not increase additional in existing control system
Hardware device Meteorological, maintenance cost are lower.
2, the present invention has forewarning function.By the anomalous variation real-time judge to unit operating parameter, giving warning in advance has
The hidden danger of unit safety operation may be jeopardized, operating states of the units is held more accurately for operations staff and provide effective letter
Breath provides foundation for reasonably optimizing operation operation, while handling security risk in time for operations staff, it is ensured that set steady fortune
Row has won the time.
3, the present invention provides effective clue for analysis on accident cause.It after the accident, can be by retrieving for examination operating parameter
Anomalous variation record, accurately and quickly finds out accident occurrence cause.
Detailed description of the invention
Fig. 1 is the basic flow chart of present invention method.
Specific embodiment
As shown in Figure 1, the implementation steps packet of the method for the present embodiment real-time judge thermal power unit operation abnormal parameters variation
It includes:
1) multiple numerical value that fired power generating unit specifies operating parameter in interval between diagnosis are obtained；
2) judge specified operating parameter whether occur three kinds of situations 1.~3.: 1. situation is mutation；2. situation is to connect
It is continuous to be incremented by or continuously successively decrease；3. situation is unusual fluctuations occur；If there is three kinds of situations 1.~3. in any one, then sentence
The fixed thermal power unit operation abnormal parameters；If three kinds of situations 1.~3. do not occur, determine the thermal power unit operation parameter
Normally.
It should be noted that situation 1.~3. between it is mutually indepedent, can both judge parallel, can also successively be sentenced
It is disconnected, when successively judgement, it can according to need and adjust its sequencing.For example, in the present embodiment according to situation 1.~
3. sequencing successively judged.As shown in Figure 1, the detailed step of step 2 includes:
2.1) judge 1. whether specified operating parameter situation occurs, 1. situation is mutation, 1. if there is situation, then determine
The thermal power unit operation abnormal parameters, are exited；Otherwise it jumps and executes step 2.2)；
2.2) judge 2. whether specified operating parameter situation occurs, 2. situation is to occur being increased continuously or continuously successively decrease, if gone out
2. existing situation, then determines the thermal power unit operation abnormal parameters, exits；Otherwise it jumps and executes step 2.3)；
2.3) judge 3. whether specified operating parameter situation occurs, 3. situation is unusual fluctuations occur, 3. if there is situation, then
Determine the thermal power unit operation abnormal parameters, exits；Otherwise it jumps and executes step 2.4)；
2.4) determine that the thermal power unit operation parameter is normal.
Judging whether specified operating parameter the detailed step of situation 1. occurs in the present embodiment, in step 2 includes: to be directed to
The n numerical value { x that specified thermal power unit operation parameter in interval between diagnosis arranges sequentially in time0, x1, ……xn, it will
Arbitrary neighborhood two values subtract each other and calculate thoroughly deserve consecutive number value difference absolute value sequence | x1-x0|, |x2-x1|,
……|xn-xn-1|, judge consecutive number value difference absolute value sequence | x1-x0|, |x2-x1|, ……|xn-xn-1| in be greater than it is pre-
Whether the element number of first given threshold is true more than or equal to 1, determines 1. the operational parameter value situation occurs if setting up.
In the present embodiment, judge consecutive number value difference absolute value sequence | x1-x0|, |x2-x1|, ……|xn-xn-1| in it is big
It is more than or equal to 1 in the element number of preset threshold value whether true to specifically refer to: calculates consecutive number value difference by counter
Absolute value sequence | x1-x0|, |x2-x1|, ……|xn-xn-1| in be greater than preset threshold value element number, it is every occur one
The counter is then added 1 by a element greater than preset threshold value, judge the final count value m of counter be more than or equal to 1 whether
Set up, if set up if determine consecutive number value difference absolute value sequence | x1-x0|, |x2-x1|, ……|xn-xn-1| in be greater than it is pre-
The element number of first given threshold be more than or equal to 1 set up, otherwise determine consecutive number value difference absolute value sequence | x1-x0|, |x2-x1
|, ……|xn-xn-1| in be greater than preset threshold value element number be more than or equal to it is 1 invalid；Into next diagnosis week
When the phase, by counter O reset.
Judging whether specified operating parameter the detailed step of situation 2. occurs in the present embodiment, in step 2 includes: to be directed to
The n numerical value { x that specified thermal power unit operation parameter in interval between diagnosis arranges sequentially in time0, x1, ……xn, it obtains
Fetch value sequence { x0, x1, ……xnIn maximum value xmaxWith minimum value xmin, seek maximum value xmaxWith minimum value xminIt
Between difference xd；Two elements of arbitrary neighborhood in sequence of values are subtracted each other to obtain adjacent values difference sequence { x1-x0, x2-x1,
……xn-xn-1, if adjacent values difference sequence { x1-x0, x2-x1, ……xn-xn-1In whole elements be greater than or equal to 0,
And difference xdThe preset threshold value of big Mr. Yu then determines that the specified operational parameter value is increased continuously；If adjacent values difference sequence
{ x1-x0, x2-x1, ……xn-xn-1In whole elements all less than or be equal to 0 and difference xdBig Mr. Yu is preset
Threshold value then determines that the specified operational parameter value continuously successively decreases；If the specified operational parameter value is increased continuously or continuously successively decreases,
Determine 2. the operating parameter situation occurs.
Judging whether specified operating parameter the detailed step of situation 3. occurs in the present embodiment, in step 2 includes: to be directed to
The n numerical value { x that specified thermal power unit operation parameter in interval between diagnosis arranges sequentially in time0, x1, ……xn, it obtains
Fetch value sequence { x0, x1, ……xnIn maximum value xmaxWith minimum value xmin, seek maximum value xmaxWith minimum value xminIt
Between difference xd；Two operational parameter values of arbitrary neighborhood are subtracted each other to obtain adjacent values difference sequence { x1-x0, x2-x1, ……
xn-xn-1, further according to adjacent values difference sequence { x1-x0, x2-x1, ……xn-xn-1In element, calculate adjacent element multiply
Product obtains adjacent element product sequence { (x1-x0)·(x2-x1) , (x2-x1)·(x3-x2) ,……, (xn-1-xn-2)·
(xn-xn-1)}；If adjacent element product sequence { (x1-x0)·(x2-x1) , (x2-x1)·(x3-x2) ,……, (xn-1-
xn-2)·(xn-xn-1) less than or equal to 0 element quantity be greater than or equal to preset threshold and difference xdMore than or equal to pre-
First given threshold then determines 3. the specified operating parameter situation occurs.
In the present embodiment, adjacent element product sequence { (x is judged1-x0)·(x2-x1) , (x2-x1)·(x3-x2)
,……, (xn-1-xn-2)·(xn-xn-1) less than or equal to 0 element quantity be greater than or equal to preset threshold detailed step
It suddenly include: that adjacent element product sequence { (x is calculated by counter1-x0)·(x2-x1) , (x2-x1)·(x3-x2)
,……, (xn-1-xn-2)·(xn-xn-1) less than or equal to 0 element quantity, it is every occur one be less than or equal to 0 member
It is plain then the counter is added 1, judge whether the final count value n of counter is greater than or equal to preset threshold true, if set up
Then determine adjacent element product sequence { (x1-x0)·(x2-x1) , (x2-x1)·(x3-x2) ,……, (xn-1-xn-2)·
(xn-xn-1) less than or equal to 0 element quantity be greater than or equal to preset threshold establishment；Otherwise determine adjacent element product sequence
Arrange { (x1-x0)·(x2-x1) , (x2-x1)·(x3-x2) ,……, (xn-1-xn-2)·(xn-xn-1) less than or equal to 0
It is invalid that the quantity of element is greater than or equal to preset threshold；When into next interval between diagnosis, by counter O reset.
In the present embodiment, adjacent element product sequence { (x is judged1-x0)·(x2-x1) , (x2-x1)·(x3-x2)
,……, (xn-1-xn-2)·(xn-xn-1) less than or equal to 0 element quantity be greater than or equal to preset threshold when, preset threshold
Being worth value is 3, and specified thermal power unit operation parameter arranges sequence of values { x sequentially in time0, x1, ……xnElement
Number n is not less than 10.
In the present embodiment, when step 1) obtains multiple numerical value of the specified thermal power unit operation parameter in interval between diagnosis,
The length of interval between diagnosis is 10~45s, and frequency when obtaining the multiple numerical value of specified operating parameter is equal to the operating parameter in data
Frequency acquisition in acquisition system.In the present embodiment, operational parameter value record per second is primary.
The present embodiment also provides a kind of system of real-time judge thermal power unit operation abnormal parameters variation, including computer is set
Standby, computer equipment is programmed to perform the method for the aforementioned real-time judge thermal power unit operation abnormal parameters variation of the present embodiment
Step.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of method of real-time judge thermal power unit operation abnormal parameters variation, it is characterised in that implementation steps include:
1) multiple numerical value that fired power generating unit specifies operating parameter in interval between diagnosis are obtained；
2) judge specified operating parameter whether occur three kinds of situations 1.~3.: 1. situation is mutation；2. situation is to connect
It is continuous to be incremented by or continuously successively decrease；3. situation is unusual fluctuations occur；If there is three kinds of situations 1.~3. in any one, then sentence
The fixed thermal power unit operation abnormal parameters；If three kinds of situations 1.~3. do not occur, determine the thermal power unit operation parameter
Normally.
2. the method for real-time judge thermal power unit operation abnormal parameters variation according to claim 1, which is characterized in that step
Rapid detailed step 2) includes:
2.1) judge 1. whether specified operating parameter situation occurs, 1. situation is mutation, 1. if there is situation, then determine
The thermal power unit operation abnormal parameters, are exited；Otherwise it jumps and executes step 2.2)；
2.2) judge 2. whether specified operating parameter situation occurs, 2. situation is to occur being increased continuously or continuously successively decrease, if gone out
2. existing situation, then determines the thermal power unit operation abnormal parameters, exits；Otherwise it jumps and executes step 2.3)；
2.3) judge 3. whether specified operating parameter situation occurs, 3. situation is unusual fluctuations occur, 3. if there is situation, then
Determine the thermal power unit operation abnormal parameters, exits；Otherwise it jumps and executes step 2.4)；
2.4) determine that the thermal power unit operation parameter is normal.
3. the method for real-time judge thermal power unit operation abnormal parameters variation according to claim 1 or 2, feature exist
In judging whether specified operating parameter the detailed step of situation 1. occurs in step 2 includes: for the finger in interval between diagnosis
Determine the n numerical value { x that thermal power unit operation parameter arranges sequentially in time0, x1, ……xn, by arbitrary neighborhood two values
Subtract each other and calculate thoroughly deserve consecutive number value difference absolute value sequence | x1-x0|, |x2-x1|, ……|xn-xn-1|, judge phase
The adjacent absolute value sequence of numerical difference | x1-x0|, |x2-x1|, ……|xn-xn-1| in be greater than preset threshold value element number
It is whether true more than or equal to 1, determine 1. the operational parameter value situation occurs if setting up.
4. the method for real-time judge thermal power unit operation abnormal parameters variation according to claim 3, which is characterized in that institute
State judge consecutive number value difference absolute value sequence | x1-x0|, |x2-x1|, ……|xn-xn-1| in be greater than preset threshold value
Whether element number is more than or equal to 1 and true specifically refers to: calculated by counter consecutive number value difference absolute value sequence | x1-x0
|, |x2-x1|, ……|xn-xn-1| in be greater than preset threshold value element number, it is every occur one be greater than presets threshold
The counter is then added 1 by the element of value, judges that whether the final count value m of counter is true more than or equal to 1, sentences if setting up
Determine consecutive number value difference absolute value sequence | x1-x0|, |x2-x1|, ……|xn-xn-1| in be greater than preset threshold value element
Number be more than or equal to 1 set up, otherwise determine consecutive number value difference absolute value sequence | x1-x0|, |x2-x1|, ……|xn-xn-1|}
In be greater than preset threshold value element number be more than or equal to it is 1 invalid；It is when into next interval between diagnosis, counter is clear
Zero.
5. the method for real-time judge thermal power unit operation abnormal parameters variation according to claim 1 or 2, feature exist
In judging whether specified operating parameter the detailed step of situation 2. occurs in step 2 includes: for the finger in interval between diagnosis
Determine the n numerical value { x that thermal power unit operation parameter arranges sequentially in time0, x1, ……xn, obtain sequence of values { x0,
x1, ……xnIn maximum value xmaxWith minimum value xmin, seek maximum value xmaxWith minimum value xminBetween difference xd；It will count
Two elements of arbitrary neighborhood subtract each other to obtain adjacent values difference sequence { x in value sequence1-x0, x2-x1, ……xn-xn-1, if adjacent
Numerical value difference sequence { x1-x0, x2-x1, ……xn-xn-1In whole elements be greater than or equal to 0 and difference xdBig Mr. Yu is preparatory
The threshold value of setting then determines that the specified operational parameter value is increased continuously；If adjacent values difference sequence { x1-x0, x2-x1, ……
xn-xn-1In whole elements all less than or be equal to 0 and difference xdThe preset threshold value of big Mr. Yu then determines the specified fortune
Row parameter value continuously successively decreases；If the specified operational parameter value is increased continuously or continuously successively decreases, determine that the operating parameter occurs
Situation is 2..
6. the method for real-time judge thermal power unit operation abnormal parameters variation according to claim 1 or 2, feature exist
In judging whether specified operating parameter the detailed step of situation 3. occurs in step 2 includes: for the finger in interval between diagnosis
Determine the n numerical value { x that thermal power unit operation parameter arranges sequentially in time0, x1, ……xn, obtain sequence of values { x0,
x1, ……xnIn maximum value xmaxWith minimum value xmin, seek maximum value xmaxWith minimum value xminBetween difference xd；It will appoint
Two neighboring operational parameter value of anticipating subtracts each other to obtain adjacent values difference sequence { x1-x0, x2-x1, ……xn-xn-1, further according to phase
Adjacent numerical value difference sequence { x1-x0, x2-x1, ……xn-xn-1In element, calculate adjacent element product and obtain adjacent element and multiply
Product sequence { (x1-x0)·(x2-x1) , (x2-x1)·(x3-x2) ,……, (xn-1-xn-2)·(xn-xn-1)}；If adjacent member
Plain product sequence { (x1-x0)·(x2-x1) , (x2-x1)·(x3-x2) ,……, (xn-1-xn-2)·(xn-xn-1) be less than or
The quantity of element equal to 0 is greater than or equal to preset threshold and difference xdMore than or equal to preset threshold value, then determine that this refers to
Determine operating parameter and situation occurs 3..
7. the method for real-time judge thermal power unit operation abnormal parameters variation according to claim 6, which is characterized in that sentence
Disconnected adjacent element product sequence { (x1-x0)·(x2-x1) , (x2-x1)·(x3-x2) ,……, (xn-1-xn-2)·(xn-
xn-1) less than or equal to 0 element quantity be greater than or equal to preset threshold detailed step include: to be calculated by counter
Adjacent element product sequence { (x1-x0)·(x2-x1) , (x2-x1)·(x3-x2) ,……, (xn-1-xn-2)·(xn-xn-1)}
The counter is then added 1, judges counter by the quantity of the element less than or equal to 0, element of the every appearance one less than or equal to 0
Whether final count value n is true more than or equal to preset threshold, determines adjacent element product sequence { (x if setting up1-
x0)·(x2-x1) , (x2-x1)·(x3-x2) ,……, (xn-1-xn-2)·(xn-xn-1) less than or equal to 0 element number
Amount is greater than or equal to preset threshold and sets up；Otherwise determine adjacent element product sequence { (x1-x0)·(x2-x1) , (x2-x1)·
(x3-x2) ,……, (xn-1-xn-2)·(xn-xn-1) less than or equal to 0 element quantity be greater than or equal to preset threshold not
It sets up；When into next interval between diagnosis, by counter O reset.
8. the method for real-time judge thermal power unit operation abnormal parameters variation according to claim 6, which is characterized in that sentence
Disconnected adjacent element product sequence { (x1-x0)·(x2-x1) , (x2-x1)·(x3-x2) ,……, (xn-1-xn-2)·(xn-
xn-1) less than or equal to 0 element quantity be greater than or equal to preset threshold when, preset threshold value be 3, specify fired power generating unit
Operating parameter arranges sequence of values { x sequentially in time0, x1, ……xnElement number n be not less than 10.
9. the method for real-time judge thermal power unit operation abnormal parameters variation according to claim 1, which is characterized in that step
When the rapid multiple numerical value for 1) obtaining specified thermal power unit operation parameter in interval between diagnosis, the length of interval between diagnosis is 10~
45s, frequency when obtaining the multiple numerical value of specified operating parameter are equal to frequency acquisition of the operating parameter in data collection system.
10. a kind of system of real-time judge thermal power unit operation abnormal parameters variation, including computer equipment, it is characterised in that:
The computer equipment is programmed to perform real-time judge thermal power unit operation parameter described in any one of claim 1~9
The step of method of anomalous variation.
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