CN103926506A - Turbine generator rotor winding short circuit fault diagnosis method based on structured function - Google Patents
Turbine generator rotor winding short circuit fault diagnosis method based on structured function Download PDFInfo
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- CN103926506A CN103926506A CN201410063814.XA CN201410063814A CN103926506A CN 103926506 A CN103926506 A CN 103926506A CN 201410063814 A CN201410063814 A CN 201410063814A CN 103926506 A CN103926506 A CN 103926506A
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Abstract
Disclosed is a turbine generator rotor winding short circuit fault diagnosis method based on a structured function. The no-load electrodynamic potential of an electric generator is obtained according to the state variable when the electric generator operates normally, the no-load electrodynamic potential is reduced to the grid frequency of 50 Hz, and the function of a no-load electrodynamic potential reduction value relative to exciting current is built according to a curve fitting method. When fault diagnosis is carried out, firstly, the no-load electrodynamic potential is calculated through the actually measured state variable of the electric generator and is reduced to the grid frequency of 50 Hz, the no-load electrodynamic potential is compared with the no-load electrodynamic potential reduction value obtained by the structured function, a fault criteria value is obtained, and whether a rotor winding turn-to-turn short circuit fault exists on a turbine generator or not is determined by comparing the fault criteria value and a set threshold value. The turbine generator rotor winding short circuit fault diagnosis method is high in diagnosis efficiency, the health state of a rotor winding can be monitored on line and can also be analyzed off line, and the method has the great significance on preventing the fault from worsening, decreasing economic losses and improving the stability of a power system.
Description
Technical field
The present invention relates to a kind of method that can inline diagnosis rotor of steam turbo generator winding whether has shorted-turn fault, belong to technical field of generators.
Background technology
The 600MW of the main force type that rotor interturn short-circuit Frequent Troubles, the especially electric system of turbodynamo is in recent years common, the at present report of existing many rotor interturn short-circuit faults.Take certain province as example, and 2007 to 2010 successively there is rotor interturn short-circuit fault in existing 9 large turbo-type generators, wherein have 7 to be more than 600MW grade high-rating generator, and two is the generator of 400MW grade.In 2009,3 have just been occurred within 1 year; In 2010,5 have just been occurred within 1 year.Rotor interturn short-circuit fault has had a strong impact on completing smoothly of generating task, has also caused huge economic loss, brings challenges to the safe and stable operation of regional power grid simultaneously.Therefore, rotor of large turbo-type generator winding interturn short-circuit fault is monitored and forecasts to be very necessary.
The diagnostic method of turn-to-turn short circuit of rotor winding of automobile turbine generator fault is divided into off-line and online two classes.Wherein off-line checking method cannot be found fault conventionally in time, and cannot detect dynamic rotor interturn short-circuit fault, and its application is restricted.Therefore, online rotor interturn short-circuit fault detection method is following development trend, and the rotor interturn short-circuit online test method of high sensitivity, high reliability is gathered around and had broad application prospects.
The on-line fault diagnoses method on rotor winding inter turn short-circuit adopting on large turbo-type generator is at present mainly coil probe method, exciting current method and shaft voltage method.Coil is surveyed ratio juris: the slot leakage flux that stretches into detecting coil detection rotor winding between generator stator core section, owing to there is the groove winding effective turn of rotor interturn short-circuit, reduce, its leakage flux answers slot leakage flux little than another pole pair of rotor, by contrast detecting coil, cuts the Pulse Electric kinetic potential amplitude that each slot leakage flux responds to is whether diagnosable turbodynamo exists rotor interturn short-circuit fault.But the method has following shortcoming: 1. the stray field of stator winding is disturbed detecting coil signal formation during generator loading, during generator heavy duty, situation is particularly serious, causes fault not obvious, and the sensitivity of Fault Identification sharply declines; 2. rotor of steam turbo generator groove is narrow and dark, when rotor interturn short-circuit fault occurs in rotor slot bottom and the short circuit number of turn when less, impact on notch leakage flux is limited, be not enough to form obvious fault signature, so the inapplicable detection of the method occurs in the slight rotor interturn short-circuit fault of trench bottom.3. coil probe method needs professional and technical personnel to judge whether to exist rotor interturn short-circuit fault by observing detecting coil waveform conventionally, from fault, occurs to the delay that fault verification has the long period, in fact can not can be regarded as real-time fault detection method.
Exciting current ratio juris is: turbodynamo occurs that the amplitude of air-gap mmf after rotor interturn short-circuit fault declines, exciter current of generator can increase to some extent, the theoretical value of exciting current and actual value are compared, when both deviations surpass certain limit, can conclude that generator exists rotor interturn short-circuit fault.The relative variation threshold value that the method arranges exciting current is conventionally 2.5%, while only having turbodynamo that shorted-turn faults more than 2 circles occurs, just can effectively judge.
The current range of application of turn-to-turn short circuit of rotor winding of automobile turbine generator method for diagnosing faults based on shaft voltage is less, although proved its validity in on-the-spot fault diagnosis example, but the impact due to environment contamination, carbon brush and the more high factor of rotating shaft sliding contact speed, may occur that carbon brush contacts unreliable problem with rotating shaft, need periodic cleaning and maintenance.
In a word, although at present the online detection of turn-to-turn short circuit of rotor winding of automobile turbine generator fault is attached great importance to, but existing various diagnostic method all also comes with some shortcomings in application, after generating plant generation rotor interturn short-circuit fault, fail to find in time and cause the example of serious consequence of common occurrence, being therefore necessary further to improve the diagnostic level of this type of fault.
Summary of the invention
The object of the invention is to the drawback for prior art, provide a kind of rotor of steam turbo generator Winding Short Fault Diagnosis method based on constructor, to improve the diagnostic level of this type of fault.
Problem of the present invention realizes with following technical proposals:
A rotor of steam turbo generator Winding Short Fault Diagnosis method based on constructor, many groups historical data when it utilizes generator normally to move is tried to achieve corresponding no-load electromotive force
, and by its reduction to 50Hz's
, adopt the method for curve to build no-load electromotive force reduction value
about exciting current
function
; While carrying out fault diagnosis, utilize the actual no-load electromotive force of generator operation data calculating generator of Real-time Collection
, and its reduction is obtained to 50Hz
, then by it with according to function
calculate no-load electromotive force reduction value
contrast, failure criterion:
, finally failure criterion a% and setting threshold are compared and judge whether this turbodynamo exists rotor interturn short-circuit fault.
The above-mentioned rotor of steam turbo generator Winding Short Fault Diagnosis method based on constructor, said method comprising the steps of:
1. build no-load electromotive force reduction value about the function of exciting current:
Historical data when group generators normally move more than a. obtaining from DCS (scattered control system), comprises line voltage U, line current I, active-power P, reactive power Q, mains frequency f and exciting current I
f;
B. for every group of state variable, according to expression formula
try to achieve no-load electromotive force
, and its reduction is arrived to 50Hz,
, form
array, wherein:
represent power-factor angle,
, x
srepresent generator synchronous reactance, r
arepresent stator winding resistance;
C. adopt the method for curve to build
about I
ffunction
;
2. the diagnosis of turn-to-turn short circuit of rotor winding of automobile turbine generator fault:
A. from DCS, obtain the real-time running data of generator, comprise actual measurement line voltage
, actual measurement line current
, actual measurement active power
, actual measurement reactive power
, actual measurement mains frequency
, actual measurement exciting current
;
B. according to expression formula
try to achieve no-load electromotive force
, and its reduction is arrived to 50Hz, obtain the actual no-load electromotive force reduction value of generator
, wherein:
;
C. will survey exciting current
substitution constructor
, calculate to obtain no-load electromotive force reduction value
, and then try to achieve failure criterion value:
;
D. failure criterion a% is compared with its setting threshold, if failure criterion a% exceeds setting threshold, judge that this turbodynamo exists rotor interturn short-circuit fault.
The above-mentioned rotor of steam turbo generator Winding Short Fault Diagnosis method based on construction function, according to the degree of the size judgement rotor interturn short-circuit fault of failure criterion a%: a% numerical value is larger, illustrates that rotor interturn short-circuit fault degree is more serious.
The above-mentioned rotor of steam turbo generator Winding Short Fault Diagnosis method based on construction function, the Threshold of described failure criterion a% is 0.5%.
Diagnostic method of the present invention is non-intrusion type, do not need extra sensor installation, according to the existing service data of turbodynamo, judge whether it exists rotor interturn short-circuit fault and fault degree, both can carry out on-line monitoring to turbodynamo, also can regularly from DCS, obtain generator history data off-line analysis rotor winding health status, this is for preventing that turn-to-turn short circuit of rotor winding of automobile turbine generator fault from worsening, reducing the economic loss that unplanned idle time causes and improving all important in inhibitings of stability of power system.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is the electromotive force vector plot of turbodynamo;
Fig. 2 is rotor of steam turbo generator Winding Short Fault Diagnosis process flow diagram;
Fig. 3 is QFSN-300-2-20B type rotor of steam turbo generator winding overhang deformation;
The contrast of no-load electromotive force reduction value when Fig. 4 constructor curve and normal operation;
The contrast of no-load electromotive force reduction value when Fig. 5 constructor curve and failure operation.
In literary composition, each symbol inventory is:
, normally move no-load electromotive force,
, normally move the reduction value of no-load electromotive force,
, actual measurement no-load electromotive force,
, actual measurement no-load electromotive force reduction value, a%, failure criterion; U, normal travel line voltage, I, normal travel line electric current, P, normally move active power, Q, normally moves reactive power, f, normally moves mains frequency, I
f, normally move exciting current,
, normal operate power factor angle, x
s, generator synchronous reactance, r
a, stator winding resistance,
, actual measurement line voltage,
, actual measurement line current,
, actual measurement active power,
, actual measurement reactive power,
, actual measurement mains frequency,
, actual measurement exciting current,
, normally move air gap electromotive force.
Embodiment
In generator normal course of operation, air gap electromotive force
with generator phase voltage U approximately equal, this means that power generator air gap magnetic flux size is substantially constant, the degree of saturation of generator field remains unchanged, the no-load electromotive force of generator
with
between linear approximate relationship.Can utilize the method for curve to build
about
function.
Many groups historical data when first obtaining turbodynamo and normally moving, every group of data content comprises generator line voltage U, line current I, active-power P, reactive power Q, mains frequency f and exciting current I
f, various running statuses, particularly exciting current that these data should contain this generator as far as possible should contain the situation from smaller value to ratings.
Suppose that i group data are (U
i, I
i, P
i, Q
i, f
i, I
fi), according to the vector relations in turbodynamo electromotive force vector plot 1, can organize in the hope of each the power-factor angle of data
, further try to achieve no-load electromotive force:
（1）
Under the constant prerequisite of exciting current, no-load electromotive force and mains frequency (generator turns frequently) are directly proportional, and the turbodynamo mains frequency in process that is incorporated into the power networks may depart from 50Hz, causes no-load electromotive force become large or diminish, no-load electromotive force is unified to reduction to 50Hz mains frequency, for this reason:
（2）
Build array
as the data of curve, by curve, form no-load electromotive force about the function of exciting current:
（3）
Like this, can be according to the generator exciting current value I of any time of running
fthe turbodynamo no-load electromotive force reduction value of calculating during without rotor interturn short-circuit fault
.
If turbodynamo exists rotor interturn short-circuit fault, the effective turn of rotor winding reduces, and excitation magnetic kinetic potential declines, and no-load electromotive force synchronously declines.The state variable of supposing any time generator for (
,
,
,
,
,
), in conjunction with the reduction value of the actual no-load electromotive force of Fig. 1 vector relations calculating generator:
（4）
Will
bring constructor into
obtain calculating no-load electromotive force
.
Above two electromotive force are contrasted, and failure criterion is:
（5）
If a% exceeds setting threshold 0.5%, judge that this turbodynamo exists rotor interturn short-circuit fault.
The flow process of fault diagnosis is shown in Fig. 2.
Fault diagnosis example
There is rotor interturn short-circuit fault in QFSN-300-2-20B type turbodynamo of in March, 2012 Indonesia power plant, this generator nominal parameter is in Table 1.Shut down in maintenance process generator amature is pulled out to retaining ring processing, find that failure cause is: field copper Leading Edge Deformation causes 5, No. 6 groove winding short circuits of rotor, and the winding of 5, No. 6 grooves almost, all by short circuit, is shown in Fig. 3.
Table 1 QFSN-300-2-20B type turbodynamo parameter
Part service data before and after this turbodynamo accident occurs is in Table 2.
Table 2 QFSN-300-2-20B type turbodynamo service data
According to the normal service data of this turbodynamo (the 1st to the 6th group), adopt the method for curve to complete function
structure, due to linear approximate relationship between no-load electromotive force and exciting current, so fitting function do not need very high exponent number, fitting result is shown in formula (6).
（6）
Now by constructor
corresponding curve and the 1st to the 6th group of off-line that service data is corresponding point are presented in Fig. 4, the almost linear relation between no-load electromotive force reduction value and exciting current as seen from Figure 4, constructed function
there is good consistance with generator operation data.
Now by function
the calculating no-load electromotive force reduction value obtaining
with actual no-load electromotive force reduction value
and both deviations are set forth in table 3.
No-load electromotive force contrast when table 3 generator normally moves
As can be seen from Table 2: calculate no-load electromotive force reduction value
with actual no-load electromotive force reduction value
numerical value very approaching, both maximum deviations are no more than 0.2%, the no-load electromotive force when constructed function being described calculating generator normally moving exactly.
Below the service data after this generator generation rotor interturn short-circuit fault (the 7th in table 2 is to the 28th group of data) is analyzed, obtained actual no-load electromotive force reduction value
, and with constructor curve comparison, see Fig. 5.
From Fig. 5, obviously can see the actual no-load electromotive force after fault
only have four groups nearer apart from constructed fuction, these four groups of data are respectively the 7th group, the 8th group, the 9th group and the 10th group, these four groups of data are to record at the generator failure initial stage, fault degree is lighter, therefore both deviations are little.But owing to not finding in time fault, Turbo-generator Set continues operation and causes fault to worsen, the 11st to the 28th group of actual no-load electromotive force reduction value that data are corresponding
larger with constructor deviation, generator rotor interturn short-circuit fault has developed into the order of severity.
Table 4 has been listed actual no-load electromotive force reduction value
with the calculating no-load electromotive force reduction value that adopts constructor to obtain
deviation situation.
No-load electromotive force contrast during table 4 generator generation rotor interturn short-circuit fault
From table 4, can not only see that rotor interturn short-circuit fault degree, along with the development trend of time, can also see: at the fault initial stage, a% numerical value is less, degree of short circuit dynamic change and unstable; Turn-to-turn short circuit degree subsequently increases the weight of, and a% reaches 12% left and right, and last 4 groups of data (the 25th, 26,27,28 groups) data show that rotor interturn short-circuit degree is also continuing development.
The method that adopts this patent to propose shows the analysis of above-mentioned fault diagnosis example data: adopt constructed fuction can efficient diagnosis to have the rotor interturn short-circuit fault of turbodynamo.When rotor of steam turbo generator winding is during without shorted-turn fault, a% is always in less numerical value.The rotor winding of turbodynamo generally has 160 circle left and right, even if there is 1 circle short circuit a%, also can surpass 0.5%, therefore can be 0.5% by the threshold value setting of fault verification, even if the slightest like this rotor interturn short-circuit fault (1 circle short circuit) also can successfully be detected.In addition, by frequency reduction, eliminate the impact of mains frequency fluctuation on failure criterion a%, improved sensitivity and the reliability of fault detect.Along with increasing the weight of of degree of short circuit, the numerical value of a% is increasing, so the method can also reflect the order of severity and the development trend of rotor interturn short-circuit fault.
Claims (4)
1. the rotor of steam turbo generator Winding Short Fault Diagnosis method based on constructor, is characterized in that, many groups historical data when it utilizes generator normally to move is tried to achieve corresponding no-load electromotive force
, and its reduction is obtained to 50Hz
, adopt the method for curve to build no-load electromotive force reduction value
about exciting current I
ffunction
; While carrying out fault diagnosis, utilize the actual no-load electromotive force of generator operation data calculating generator of Real-time Collection
, and its reduction is obtained to 50Hz
, then by it with according to function
calculate no-load electromotive force reduction value
contrast, failure criterion:
, finally failure criterion a% and setting threshold are compared and judge whether this turbodynamo exists rotor interturn short-circuit fault.
2. a kind of rotor of steam turbo generator Winding Short Fault Diagnosis method based on constructor according to claim 1, is characterized in that, said method comprising the steps of:
1. build no-load electromotive force reduction value about the function of exciting current:
Historical data when group generators normally move more than a. obtaining from DCS (scattered control system), comprises line voltage U, line current I, active-power P, reactive power Q, electric frequency f and exciting current I
f;
B. for every group of state variable, according to expression formula
try to achieve no-load electromotive force
, and its reduction is arrived to 50Hz,
, form
array, wherein:
represent power-factor angle,
, x
srepresent generator synchronous reactance, r
arepresent stator winding resistance;
C. adopt the method for curve to build
about I
ffunction
;
2. the diagnosis of turn-to-turn short circuit of rotor winding of automobile turbine generator fault:
A. from DCS, obtain the real-time running data of generator, comprise actual measurement line voltage
, actual measurement line current
, actual measurement active power
, actual measurement reactive power
, survey electric frequency
, actual measurement exciting current
;
B. according to expression formula
try to achieve no-load electromotive force
, and its reduction is arrived to 50Hz, obtain the actual no-load electromotive force reduction value of generator
, wherein:
;
C. will survey exciting current
substitution constructor
, obtain calculating no-load electromotive force
, and then try to achieve failure criterion value:
;
D. failure criterion a% is compared with its setting threshold, if failure criterion a% exceeds setting threshold, judge that this turbodynamo exists rotor interturn short-circuit fault.
3. a kind of rotor of steam turbo generator Winding Short Fault Diagnosis method based on constructor according to claim 1 and 2, it is characterized in that, according to the size of failure criterion a%, judge the degree of rotor interturn short-circuit fault: a% numerical value is larger, illustrates that rotor interturn short-circuit fault degree is more serious.
4. a kind of rotor of steam turbo generator Winding Short Fault Diagnosis method based on constructor according to claim 3, is characterized in that, the Threshold of described failure criterion a% is 0.5%.
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|---|---|---|---|
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|---|---|---|---|
| CN201410063814.XA CN103926506B (en) | 2014-02-25 | 2014-02-25 | Based on the rotor of steam turbo generator Winding Short Fault Diagnosis method of constructor |
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| Publication Number | Publication Date |
|---|---|
| CN103926506A true CN103926506A (en) | 2014-07-16 |
| CN103926506B CN103926506B (en) | 2016-04-20 |
Family
ID=51144798
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|---|---|---|---|
| CN201410063814.XA Expired - Fee Related CN103926506B (en) | 2014-02-25 | 2014-02-25 | Based on the rotor of steam turbo generator Winding Short Fault Diagnosis method of constructor |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1869719A (en) * | 2006-06-15 | 2006-11-29 | 西安交通大学 | On-line monitoring method for winding turn-to-turn short-circuit of distribution generator stator based on multi-criterion mixing |
| CN101017191A (en) * | 2007-03-01 | 2007-08-15 | 华北电力大学 | On-line fault diagnoses method on rotor winding inter turn short-circuit of turbine generator |
| US20080136360A1 (en) * | 2006-12-08 | 2008-06-12 | Sudhanshu Rai | Apparatus, System, and Method for Detecting an Electrical Short Condition In A Dynamoelectric Machine |
| CN101794984A (en) * | 2010-03-18 | 2010-08-04 | 清华大学 | Method for analyzing turn-to-turn fault of generator rotor based on multiloop model |
| CN103487718A (en) * | 2013-09-17 | 2014-01-01 | 东南大学 | Method for diagnosing turn-to-turn short circuit fault of permanent magnet synchronous motor |
-
2014
- 2014-02-25 CN CN201410063814.XA patent/CN103926506B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1869719A (en) * | 2006-06-15 | 2006-11-29 | 西安交通大学 | On-line monitoring method for winding turn-to-turn short-circuit of distribution generator stator based on multi-criterion mixing |
| US20080136360A1 (en) * | 2006-12-08 | 2008-06-12 | Sudhanshu Rai | Apparatus, System, and Method for Detecting an Electrical Short Condition In A Dynamoelectric Machine |
| CN101017191A (en) * | 2007-03-01 | 2007-08-15 | 华北电力大学 | On-line fault diagnoses method on rotor winding inter turn short-circuit of turbine generator |
| CN101794984A (en) * | 2010-03-18 | 2010-08-04 | 清华大学 | Method for analyzing turn-to-turn fault of generator rotor based on multiloop model |
| CN103487718A (en) * | 2013-09-17 | 2014-01-01 | 东南大学 | Method for diagnosing turn-to-turn short circuit fault of permanent magnet synchronous motor |
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| CN108180935A (en) * | 2018-01-31 | 2018-06-19 | 深圳春沐源控股有限公司 | Fault detection method and device of sensor |
| CN108180935B (en) * | 2018-01-31 | 2020-07-03 | 深圳春沐源控股有限公司 | Fault detection method and device of sensor |
| CN108918979B (en) * | 2018-07-13 | 2020-07-24 | 塔里木大学 | Inductance monitoring method considering saturation characteristics of induction motor |
| CN108918979A (en) * | 2018-07-13 | 2018-11-30 | 塔里木大学 | It is a kind of meter and induction machine saturated characteristic inductance monitoring method |
| CN111596177A (en) * | 2020-05-14 | 2020-08-28 | 润电能源科学技术有限公司 | Method, device and equipment for detecting turn-to-turn insulation of generator rotor and storage medium |
| CN111600393A (en) * | 2020-06-18 | 2020-08-28 | 国网四川省电力公司电力科学研究院 | Method for reducing voltage measurement data of transformer substation in different voltage classes and identification method |
| CN112834224A (en) * | 2021-01-05 | 2021-05-25 | 广东核电合营有限公司 | Method and system for evaluating health state of nuclear power steam turbine generator |
| CN113419170A (en) * | 2021-05-25 | 2021-09-21 | 中国神华能源股份有限公司国华电力分公司 | Fault monitoring method and device for generator rotor and storage medium |
| CN113740764A (en) * | 2021-08-25 | 2021-12-03 | 中电华创(苏州)电力技术研究有限公司 | On-line detection method and device for turn-to-turn short circuit defect of generator rotor winding |
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