CN1128369C - In-situ generator rotor monitoring instrument - Google Patents
In-situ generator rotor monitoring instrument Download PDFInfo
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- CN1128369C CN1128369C CN 01120954 CN01120954A CN1128369C CN 1128369 C CN1128369 C CN 1128369C CN 01120954 CN01120954 CN 01120954 CN 01120954 A CN01120954 A CN 01120954A CN 1128369 C CN1128369 C CN 1128369C
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- rotor
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Abstract
The present invention discloses an on-line monitor of a generator rotor, which is composed of four sensors, an industrial control PC and an A/D converter (5), wherein the four sensors are used for collecting the voltage and the current of a rotor and the wind temperature of inlets of a vapor end and an exciting end in real time, the industrial control PC is used for calculating, storing and displaying data, and the A/D converter is connected between the industrial control PC and the four sensors for collecting the voltage and the current of the generator rotor and the wind temperature of the inlets of the vapor end and the exciting end. The program operated in the mode of T<LC>=T<O>+ delta T<LE>*(I<L>/I<LE>) <2> calculated accurately is programmed in the industrial control PC. The present invention can accurately monitor the operating state of the generator rotor in real time and can accurately reflect the operating states of rotor inter turn short circuit, etc. simultaneously by the change of the temperature rise of the rotor, and the present invention provides reliable technical support for the state maintenance of synchronous motors and generators.
Description
Technical field
The present invention relates to a kind of monitor, particularly a kind of in-situ generator rotor monitoring instrument.
Background technology
Because the rotor of generator is Wound-rotor type and in service the needs adds exciting current, rotor real-time monitoring to its operating condition when high speed rotating is insoluble problem always.At present, the monitoring of generator amature running temperature all is artificial timing acquiring data, calculates gained by formula, and the computing formula that they adopt is:
Temperature of rotor (℃)=K*[(V-5)/and I]-235 ℃
Wherein V is a rotor current for rotor voltage I
K＝(234.5+T)/R
T is that the environment temperature R when measuring the rotor direct current resistance is the rotor dc resistance.
Because this computing formula is an experimental formula, result of calculation in the scope of the 80%-90% of generator rating power can be said to be accurate substantially, but exceed this scope and the very big error of calculation will occur, this error can be bigger when particularly generator moved under low load condition, this computing formula does not consider that the variation of actual entry wind-warm syndrome of generator is to the influence of Generator Rotor Temperature in addition, simultaneously can not reflect the temperature rise that short circuit causes between the rotor winding, for example when there is short circuit in the generator amature winding inter-turn, generator amature voltage should reduce, electric current should increase, temperature should raise, and what calculate with above-mentioned formula is the wrong conclusion that temperature reduces.The primary harm of this error result is the safe operation that directly jeopardizes motor, and the lighter causes the rotor overtemperature, even vibration, and weight person may burn unit.It adopts the personal monitoring in addition, and data connect inadequately and are used to, and can not realize on-line real time monitoring.
Technical field
Purpose of the present invention will provide a kind of in-situ generator rotor monitoring instrument exactly, it at first can realize the real-time monitoring to the generator amature running temperature, second it adopt accurate computation schema, can make result of calculation that very little error rate is arranged, the 3rd it can realize overload alarm.
The present invention adopts technical scheme as described below for achieving the above object: in-situ generator rotor monitoring instrument comprises and is used for gathering rotor voltage sensor, rotor current sensor, vapour end entrance wind-warm syndrome sensor in real time, encourages end entrance wind-warm syndrome data transducer, one be used to calculate, the industry control PC of storage, video data; Generator amature voltage sensor, rotor current sensor, vapour end entrance wind-warm syndrome sensor and encouraging between end entrance wind-warm syndrome sensor and the industry control PC is connected by A/D converter.Said system is carried out the running temperature of indirect calculation, storage and demonstration generator amature, and establishment has the program of carrying out computing by following accurate Calculation pattern: T in the industry control PC
LC=T
O+ Δ T
LE* (I
L/ I
LE)
2, T wherein
OFor generator is encouraged end entrance wind-warm syndrome T
OLWith vapour end entrance wind-warm syndrome T
OQMean value, T
O=(T
OL+ T
OQ)/2, Δ T
LEBe the specified permission temperature rise of generator amature, I
LBe the measured value of generator rotor current, I
LESpecified rotor current for generator.Program circuit in the industry control PC is: beginning → initialization → read Parameter File and standard rotor temperature curve → read A/D conversion value (electric current, voltage) → read temperature transition value → calculating temperature of rotor → demonstration temperature of rotor value, current value, magnitude of voltage → preservation measured value → actual measurement temperature of rotor compares with the standard rotor temperature curve → than standard deviation greater than 10 ℃? → (in this way → delayed alarm → get back to and read the A/D conversion value) as not → surpass the rated temperature value? → (in this way → delayed alarm → get back to and read the A/D conversion value) read A/D conversion value (electric current as deny → getting back to, voltage).
This monitor is like this work: at first by gathering generator amature voltage sensor, rotor current sensor, vapour end entrance wind-warm syndrome sensor, encouraging end entrance wind-warm syndrome data transducer the simulating signal of related data is passed to A/D converter, A/D converter is passed to the industry control PC after converting them to digital signal, and the industry control PC receives after the data by precise calculation T
LC=T
O+ Δ T
LE* (I
L/ I
LE)
2Calculate temperature of rotor, preserve then and show temperature of rotor value, rotor current, magnitude of voltage, also prestore the temperature of rotor curve of standard in the industry control PC, the temperature of rotor curve and the standard rotor temperature curve of actual measurement compare by look-up table, if actual measurement temperature of rotor and standard value deviation are greater than 10 ℃, instrument is delayed alarm then, illustrate that rotor turn-to-turn insulation is bad, next step is to detect the rated temperature value whether observed temperature surpasses rotor again, if surpass, instrument then carries out computing next time with regard to delayed alarm as not surpassing.This instrument is equally applicable to the status monitoring of synchronous motor.
Adopt the in-situ generator rotor monitoring instrument of technique scheme owing to utilize the temperature of rotor precise calculation to replace traditional experimental formula, replaced artificial calculating with computing machine, thereby reduced error to greatest extent, realized real-time monitoring, it can accurately reflect running statuses such as rotor inter-turn short circuit by the variation of rotor temperature rise simultaneously, for the repair based on condition of component of realizing synchronous motor, generator provides the reliable technique support.
Description of drawings
The present invention will be described in detail below in conjunction with accompanying drawing.
Fig. 1 is a program flow diagram of the present invention.
Fig. 2 is a theory diagram of the present invention.
Fig. 3 is the display mode figure of this instrument.
Embodiment
With reference to Fig. 1, Fig. 2, Fig. 3.In-situ generator rotor monitoring instrument by be used for gathering rotor voltage sensor, rotor current sensor, vapour end entrance wind-warm syndrome sensor in real time, encourage end entrance wind-warm syndrome data transducer and be used to calculate, the industry control PC and the A/D converter of storage, video data form, A/D converter be connected on generator amature voltage sensor, rotor current sensor, vapour end entrance wind-warm syndrome sensor and encourage end entrance wind-warm syndrome sensor and the industry control PC between.Said system is carried out the running temperature of indirect calculation, storage and demonstration generator amature, and establishment has the program of carrying out computing by following accurate Calculation pattern in the industry control PC:
T
LC＝T
O+ΔT
LE*(I
L/I
LE)
2
T wherein
OFor generator is encouraged end entrance wind-warm syndrome T
OLWith vapour end entrance wind-warm syndrome T
OQMean value, T
O=(T
OL+ T
OQ)/2, Δ T
LEBe the specified permission temperature rise of generator amature, it is a fixed value concerning the generator of specific model, and is general given in the instructions of generator, I
LBe the measured value of generator rotor current, I
LEBe the specified rotor current of generator, it also is a fixed value for the generator of specific model.This precise calculation and traditional experimental formula: temperature of rotor (℃)=K*[(V-5)/I]-235 ℃ the result of calculation under the identical operational factor is compared as follows:
The result of calculation difference of two formula is still very big as can be seen from the contrast of above data, and the result of calculation that facts have proved precise calculation is more near actual value.
| The machine set type | Operational factor | Result of calculation relatively | |||||||
| Model | Capacity | The type of cooling | Rotor voltage | Rotor current | Vapour end entrance wind-warm syndrome | Encourage the end entrance wind-warm syndrome | Traditional formula | Exact formulas | Difference |
| QF-2 ?5-2 | ?25MW | Air cooling | 85V | ?200A | ?38℃ | ?40℃ | 78.5℃ | ?65.0℃ | ?10.8℃ |
| 70V | ?170A | ?37℃ | ?40℃ | 62.1℃ | ?56.3℃ | ?5.8℃ | |||
| QF-5 ?0-2 | ?50MW | Hydrogen-cooled | 185V | ?450A | ?31℃ | ?34℃ | 75.4℃ | ?81.1℃ | ?-5.7℃ |
| 225V | ?500A | ?30℃ | ?32℃ | 106.4℃ | ?91.0℃ | ?-15.4℃ | |||
| 240V | ?530A | ?30℃ | ?31℃ | 109.1℃ | ?97.9℃ | ?-11.2℃ | |||
Program circuit in the industry control PC is: beginning → initialization → read Parameter File and standard rotor temperature curve → read A/D conversion value (electric current, voltage) → read temperature transition value → calculating temperature of rotor → demonstration temperature of rotor value, current value, magnitude of voltage → preservation measured value → actual measurement temperature of rotor compares with the standard rotor temperature curve → than standard deviation greater than 10 ℃? → (in this way → delayed alarm → get back to and read the A/D conversion value) as not → surpass the rated temperature value? → (in this way → delayed alarm → get back to and read the A/D conversion value) read A/D conversion value (electric current as deny → getting back to, voltage).
This monitor is like this work: at first by gathering generator amature voltage sensor, rotor current sensor, vapour end entrance wind-warm syndrome sensor, encouraging end entrance wind-warm syndrome data transducer the simulating signal of related data is passed to A/D converter, A/D converter is passed to the industry control PC after converting them to digital signal, and the industry control PC receives after the data by precise calculation T
LC=T
O+ Δ T
LE* (I
L/ I
LE)
2Calculate temperature of rotor, preserve then and show temperature of rotor value, rotor current, magnitude of voltage in Chinese mode, also prestore the temperature of rotor curve of standard in the industry control PC, the temperature of rotor curve and the standard rotor temperature curve of actual measurement compare by look-up table, if actual measurement temperature of rotor and standard value deviation are greater than 10 ℃, then delayed alarm explanation rotor winding generation turn-to-turn short circuit of instrument, next step is to detect the rated temperature value whether observed temperature surpasses rotor again, if surpass, instrument then carries out computing next time with regard to delayed alarm as not surpassing.
Need to prove that in addition the industry control PC also can be replaced by single-chip microcomputer or computer generation.
Claims (2)
1, a kind of in-situ generator rotor monitoring instrument, it comprises:
(1) be used for gathering in real time rotor voltage sensor, rotor current sensor, vapour end entrance wind-warm syndrome sensor, encourage end entrance wind-warm syndrome sensor;
(2) be used to calculate, the industrial computer of storage, video data;
(3) generator amature voltage sensor, rotor current sensor, vapour end entrance wind-warm syndrome sensor and encouraging between end entrance wind-warm syndrome sensor and the industrial computer is connected by A/D converter;
It is characterized in that: said system is carried out the running temperature of indirect calculation, storage and demonstration generator amature, and establishment has the program of carrying out computing by following accurate Calculation pattern: T in the industrial computer machine
LC=T
O+ Δ T
LE* (I
L/ I
LE)
2T wherein
OFor generator is encouraged end entrance wind-warm syndrome T
OLWith vapour end entrance wind-warm syndrome T
OQMean value, T
O=(T
OL+ T
OQ)/2, Δ T
LEBe the specified permission temperature rise of generator amature, I
LBe the measured value of generator rotor current, I
LESpecified rotor current for generator; Program circuit in the industrial computer machine is: beginning → initialization → read Parameter File and standard rotor temperature curve → read A/D conversion value → read temperature transition value → calculating temperature of rotor → demonstration temperature of rotor value, current value, magnitude of voltage → preservation measured value → actual measurement temperature of rotor compares with the standard rotor temperature curve → than standard deviation greater than 10 ℃? → (in this way → delayed alarm → get back to and read the A/D conversion value) as not → surpass the rated temperature value? → (in this way → delayed alarm → get back to and read the A/D conversion value) read the A/D conversion value as deny → getting back to.
2, in-situ generator rotor monitoring instrument according to claim 1 is characterized in that: industrial computer also can be selected single-chip microcomputer for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01120954 CN1128369C (en) | 2001-06-21 | 2001-06-21 | In-situ generator rotor monitoring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01120954 CN1128369C (en) | 2001-06-21 | 2001-06-21 | In-situ generator rotor monitoring instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1344941A CN1344941A (en) | 2002-04-17 |
| CN1128369C true CN1128369C (en) | 2003-11-19 |
Family
ID=4664368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01120954 Expired - Fee Related CN1128369C (en) | 2001-06-21 | 2001-06-21 | In-situ generator rotor monitoring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1128369C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100462729C (en) * | 2006-06-15 | 2009-02-18 | 西安交通大学 | On-line Monitoring Method for Distributed Generator Rotor Winding Turn-to-Turn Short Circuit Based on Multi-criteria Fusion |
| CN103383433A (en) * | 2013-07-03 | 2013-11-06 | 中国人民解放军海军工程大学 | Method for state monitoring and early fault warning of stator core of ship generator |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102375116B (en) * | 2010-08-09 | 2013-07-10 | 苏州百狮腾电气有限公司 | Rotor detection device and detection method thereof |
| CN102243277A (en) * | 2011-04-14 | 2011-11-16 | 国电南瑞科技股份有限公司 | Method for detecting positive sequence quantity and negative sequence quantity of rotor voltage of double-feed wind power generator under double synchronous reference frames (SRF) |
| CN102495324B (en) * | 2011-11-30 | 2014-02-26 | 芜湖杰诺瑞汽车电器系统有限公司 | A ground-to-ground and turn-to-turn short-circuit test device and test method for a permanent magnet starter rotor |
| EP2919026B1 (en) | 2014-03-11 | 2021-10-27 | ABB Schweiz AG | Method and system for determining a synchronous machine fault condition |
| CN110837042B (en) * | 2018-08-17 | 2021-06-22 | 东元电机股份有限公司 | Motor interlayer short circuit fast screening method |
| CN111007317A (en) * | 2019-11-26 | 2020-04-14 | 中广核核电运营有限公司 | Device and method for measuring insulation to ground of excitation end sealing tile of generator |
| CN110988481A (en) * | 2019-11-26 | 2020-04-10 | 中广核核电运营有限公司 | Device and method for measuring insulation to ground of excitation end sealing tile of generator |
-
2001
- 2001-06-21 CN CN 01120954 patent/CN1128369C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100462729C (en) * | 2006-06-15 | 2009-02-18 | 西安交通大学 | On-line Monitoring Method for Distributed Generator Rotor Winding Turn-to-Turn Short Circuit Based on Multi-criteria Fusion |
| CN103383433A (en) * | 2013-07-03 | 2013-11-06 | 中国人民解放军海军工程大学 | Method for state monitoring and early fault warning of stator core of ship generator |
| CN103383433B (en) * | 2013-07-03 | 2016-03-30 | 中国人民解放军海军工程大学 | The status monitoring of stator core of ship generator and fault early warning method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1344941A (en) | 2002-04-17 |
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