CN110118931A - A kind of large size phase modifier scene no-load characteristic automated testing method - Google Patents
A kind of large size phase modifier scene no-load characteristic automated testing method Download PDFInfo
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- CN110118931A CN110118931A CN201810111400.8A CN201810111400A CN110118931A CN 110118931 A CN110118931 A CN 110118931A CN 201810111400 A CN201810111400 A CN 201810111400A CN 110118931 A CN110118931 A CN 110118931A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The present invention provides a kind of large-scale phase modifier scene no-load characteristic automated testing method, it automates the method for rapid survey no-load characteristic under running down state, this method flows up boosting during phase modifier of short duration running down, it is continuous to survey record phase modifier exciting current and set end voltage curve, measurement procedure is automatically exited from after reaching the target exciting current upper limit, easily realize intelligent measure program bag, before can putting into operation for large-scale phase modifier in unit transport, installation process quality examination and unit put into operation after maintenance and preventive trial powerful measure is provided.
Description
Technical field
The present invention relates to rotating electric machine field test technical field, specifically a kind of large size phase modifier scene no-load characteristic is certainly
Dynamicization test method.
Background technique
China configures a collection of novel high-capacity phase modulation unit just in extra-high voltage grid, using the two-way transient state of its large capacity and
Stable state is idle fan-out capability, conveyance capacity, fast response characteristic improves receiving end AC network short circuit when direct current delivery limits function
Rate, voltage and system under support system failure are stablized, and provide the quality time for failure removal, at the same direct current system stable state just
Often operation provides continuously adjustable dynamic reactive when needing to adjust voltage and supports, to ensure the safety and stability fortune of extra-high voltage grid
Row.
No-load characteristic measurement is the important means examined rotating electric machine excitation parameter, detect iron core performance change,
Unit factory, overhaul or is both needed to carry out this test when necessary scene handover, be judge that can unit continue to put into operation it is important according to
According to.In general, rotating electric machine is by prime mover dragging stable operation in rated speed when carrying out no-load test；Under separate excitation operating condition,
It adjusts exciting current and is stable at different value, measure corresponding set end voltage, fitting obtains no-load characteristic.
However, converter station scene, due to large-scale phase modifier be using variable frequency starting system be dragged to 1.05 times it is specified
It after revolving speed, realizes and is incorporated into the power networks during running down, no image of Buddha conventional electric generators group is dragged by steam turbine or hydraulic turbine prime movers
Turn or maintains to carry out no-load characteristic measurement under rated speed using motor run in manufactory.Therefore, can only try
Carrying out measurement during of short duration running down, and due to using generator terminal self excitation system, according to conventional separate excitation mode, need to unlock
Energized circuit connection, while configuring interim large copacity power supply, these problems be the measurement of large-scale phase modifier scene no-load characteristic and
Data processing brings great difficulty, is the units' installation of novel high-capacity phase modulation unit, puts into operation and bring serious obstruction.
Currently, the manual measurement method of the lower no-load characteristic measurement of the lazy speed of associated field large size phase modifier, has other correlations
Patented invention, and automate measurement means still have the problems such as the degree of automation is low, reprocessing rate requirement is high, still need into
The exploitation of one step.
Summary of the invention
To solve existing phase modifier because of no prime mover, reasons cause from shunt excitation mode, coasting time be of short duration etc. using generator terminal
Scene carry out the problem that no-load characteristic measurement is difficult, the degree of automation is low, utilize large-scale phase modifier the present invention provides a kind of
Soft open of automatic exciting regulator encourages function, and the method that rapid survey no-load characteristic is automated under running down state, this method exists
Boosting is flowed up during the of short duration running down of phase modifier, it is continuous to survey record phase modifier exciting current and set end voltage curve, reach target
Measurement procedure is automatically exited from after the exciting current upper limit, easily realization intelligent measure program bag, it is right before can putting into operation for large-scale phase modifier
Unit transport, the quality examination in installation process and unit put into operation after maintenance and preventive trial powerful measure is provided.
A kind of large size phase modifier scene no-load characteristic automated testing method, includes the following steps:
(1) it is required to determine maximum floating voltage U according to test measurementmax, the maximum floating voltage UmaxFor rated speed
Under generator terminal maximum floating voltage, can refer to related standard and technical protocol and determine, do not access when boosting becomes usually 1.2 times
Generator terminal voltage rating UN；
(2) overvoltage protection and underfrequency protection are put into, is arranged by actual motion protection value；
(3) current voltage value of main excitation just being established is set as opening the minimum exciting current for encouraging and exiting rear unit and capable of normally boosting
Value, corresponding set end voltage U at this time0About 0.1-0.2UN；
(4) it is controlled using Voltage loop, generator terminal target voltage values are Ug, value U after commutation frequencygeqEqual to maximum
No-load test voltage Umax；
(5) normally starting phase modulation unit exits SFC static frequency converter, by the main excitation of unit to 1.05 times of rated speeds
It builds to press through journey and be set as soft and opens the mode of encouraging, restarting excitation switching is main excitation, and after pressure of completing just to establish, main excitation is slow
Increase, until set end voltage reaches measurement target value, pressure rising time control is within 5 minutes during test；
(6) increase magnetic, during unit running down, real-time measurement set end voltage U and exciting current I in main excitationf, and pass through machine
The real-time waveform of end voltage U obtains stator electric frequency f, converts to obtain the electricity under rated frequency to set end voltage U working frequency in real time
Pressure value Ueq, and generate original no-load characteristic If-Ueq, which can be directly as unit no-load characteristic historical data for dividing
Analysis comparison；
Wherein, commutation frequency formula is as follows:
Ueq=fN/f*U
Wherein, fNFor the electric voltage frequency of the specified operation of phase modifier, f, U are respectively the stator electric frequency frequency and generator terminal surveyed
Voltage.
(7) after set end voltage reaches target voltage values, that is, work as Ueq≥UgeqWhen, maintain exciting current constant, the duration
It must not be longer than 1 minute, then to unit demagnetization, complete the rapid survey of no-load characteristic；
(8) during unit running down, the related electric amount waveform during the entire test of record is surveyed, in each electrical quantity waveform
It all surveys record to complete and after meeting the requirements, fully considers energized circuit and the step-up transformer being connected directly with synchronous motor
Active and reactive loss further carries out remanent magnetism conversion to measurement result and degaussing is converted, curve is translated, so that translation
Origin of the extended line of curve straight length portion Jing Guo reference axis afterwards finally obtains the no-load characteristic of large-scale phase modifier.Its
In, exciting current and set end voltage curve are the curve continuously measured.
The large-scale phase modifier no-load characteristic automatic measurement method that the present invention mentions has following remarkable advantage:
1, it is controlled using Voltage loop, sets target voltage, continuously increase magnetic, can quickly and conveniently measure the sky of continuously smooth
Characteristic curve is carried, is extremely easy to realize automated procedures packet；
2, overvoltage protection and underfrequency protection are only put into, without making specific aim modification, high reliablity and is implemented simple；
3, during exciting current increase, gradually running down is lower than rated speed to revolving speed, and there is no the risks of overvoltage；
4, it can carried out under shunt excitation operating condition, solve scene and relocate, access temporary source heavy workload or even be difficult to
The problem of realization；
5, it is converted by degaussing, can fully consider energized circuit and step-up transformer loss, ensure that measurement result has
Effect property.
Detailed description of the invention
Fig. 1 is the flow diagram of large-scale phase modifier scene of the invention no-load characteristic automated testing method；
Fig. 2 is that the no-load characteristic that record obtains is surveyed in large-scale phase modifier factory type approval test, is existed with using the method for the present invention
No-load characteristic is measured under lazy speed and its converts the comparing result of curve.
Specific embodiment
Below in conjunction with the attached drawing in the present invention, the technical solution in the present invention is clearly and completely described.
Fig. 1 show the flow diagram of large-scale phase modifier scene of the invention no-load characteristic automated testing method, described
Large-scale phase modifier scene no-load characteristic automated testing method includes the following steps:
(1) it is determined referring to relevant criterion and technical protocol and tests maximum floating voltage Umax(it refers to the generator terminal under rated speed
Maximum floating voltage does not access when boosting becomes usually 1.2 times of generator terminal voltage rating UN)。
(2) overvoltage protection is put into, is arranged by actual motion protection value；Underfrequency protection is put into, by actual motion protection value
Setting.
(3) current voltage value of main excitation just being established is set as opening the minimum exciting current for encouraging and exiting rear unit and capable of normally boosting
Value, corresponding set end voltage U at this time0About 0.1-0.2UN。
(4) it is controlled using Voltage loop, generator terminal target voltage values are Ug, value U after commutation frequencygeqEqual to maximum
No-load test voltage Umax。
(5) normally starting phase modulation unit exits SFC static frequency converter, by the main excitation of unit to 1.05 times of rated speeds
It builds to press through journey and be set as soft and opens the mode of encouraging, restarting excitation switching is main excitation, and after pressure of completing just to establish, main excitation is slow
Increase, until set end voltage reaches measurement target value, the increasing magnetic time can refer to phase modifier running down curve and determine, should be in underfrequency protection
It completes to increase magnetic before movement.
(6) increase magnetic, during unit running down, real-time measurement set end voltage U and exciting current I in main excitationf, and pass through machine
The real-time waveform of end voltage U obtains stator electric frequency f.Set end voltage working frequency is converted in real time to obtain the voltage under rated frequency
Value Ueq, and generate original no-load characteristic If-Ueq, which can be directly as unit no-load characteristic historical data for analyzing
Comparison.
Wherein, commutation frequency formula is as follows:
Ueq=fN/f*U
Wherein, fNFor the electric voltage frequency of the specified operation of phase modifier, f, U are respectively the frequency surveyed and set end voltage.
(7) work as Ueq≥UgeqWhen, maintain exciting current constant, the duration must not be longer than 1 minute, then to unit demagnetization,
Complete the rapid survey of no-load characteristic.
(8) further to compare with phase modifier delivery test no-load curve, original no-load characteristic survey has been recorded at the scene
At the active and reactive loss that later, can fully consider energized circuit and the step-up transformer being connected directly with synchronous motor, into
One step carries out remanent magnetism conversion to measurement result and degaussing is converted, and curve is translated, so that curve straight length portion after translation
Origin of the extended line Jing Guo reference axis to get to the large-scale phase modifier no-load characteristic that can be compared with delivery test.
Referring to Fig. 2, it is that the obtained no-load characteristic of record is surveyed in the factory type approval test of large-scale phase modifier, and using this
Inventive method measures no-load characteristic under lazy speed and its conversion curve compares, since this method is that automation connection is surveyed
Amount, compared with the staircase curve obtained using magnetic survey is increased manually, this method measurement result is continuously smooth curve, conversion knot
Fruit has preferable consistency compared with the factory type approval test of large-scale phase modifier measures result.Fig. 2 illustrates experiment curv and the song
The conversion process of line, the test result under the more non-lazy fast operating condition of result after conversion have good consistency, demonstrate this method
Feasibility.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Belong to those skilled in the art in the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of, all answers
It is included within the scope of the present invention.
Claims (3)
1. a kind of large size phase modifier scene no-load characteristic automated testing method, it is characterised in that include the following steps:
(1) it is required to determine maximum floating voltage U according to test measurementmax, the maximum floating voltage UmaxFor under rated speed
Generator terminal maximum floating voltage；
(2) overvoltage protection and underfrequency protection are put into, is arranged by actual motion protection value；
(3) current voltage value of main excitation just being established is set as opening the minimum exciting current value for encouraging and exiting rear unit and capable of normally boosting；
(4) it is controlled using Voltage loop, generator terminal target voltage values are Ug, value U after commutation frequencygeqEqual to maximum unloaded examination
U is pressed in electrical verificationmax；
(5) normally starting phase modulation unit exits SFC static frequency converter, the main excitation of unit is built pressure to 1.05 times of rated speeds
Process is set as soft and opens the mode of encouraging, and restarting excitation switching is main excitation, and after the first pressure of establishing of completion, main excitation slowly increases
Add, until set end voltage reaches measurement target value；
(6) increase magnetic, during unit running down, real-time measurement set end voltage U and exciting current I in main excitationf, and pass through generator terminal electricity
The real-time waveform of pressure U obtains stator electric frequency f, converts to obtain the voltage value under rated frequency to set end voltage U working frequency in real time
Ueq, and generate original no-load characteristic If-Ueq, which can be directly as unit no-load characteristic historical data for analysis pair
Than；
Wherein, commutation frequency formula is as follows:
Ueq=fN/f*U
Wherein, fNFor the electric voltage frequency of the specified operation of phase modifier, f, U are respectively the stator electric frequency frequency surveyed and set end voltage；
(7) after set end voltage reaches target voltage values, that is, work as Ueq≥UgeqWhen, maintain exciting current constant, the duration must not
It is longer than 1 minute, then to unit demagnetization, completes the rapid survey of no-load characteristic；
(8) during unit running down, the related electric amount waveform during the entire test of record is surveyed, it is whole in each electrical quantity waveform
Record is surveyed to complete and after meeting the requirements, fully consider energized circuit and the step-up transformer that is connected directly with synchronous motor it is active
And reactive loss, remanent magnetism conversion further is carried out to measurement result and degaussing is converted, curve is translated, so that bent after translation
Origin of the extended line of line straight length portion Jing Guo reference axis, finally obtains the no-load characteristic of large-scale phase modifier.
2. large size phase modifier scene as described in claim 1 no-load characteristic automated testing method, it is characterised in that: step
(1) U of maximum floating voltage described inmaxIt is determined referring to related standard and technical protocol, does not access when boosting becomes usually 1.2 times
Generator terminal voltage rating UN。
3. large size phase modifier scene as described in claim 1 no-load characteristic automated testing method, it is characterised in that: step
(5) pressure rising time of set end voltage controlled within 5 minutes in.
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| CN201810111400.8A CN110118931B (en) | 2018-02-05 | 2018-02-05 | Automatic test method for on-site no-load characteristic of large phase modulator |
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| CN201810111400.8A CN110118931B (en) | 2018-02-05 | 2018-02-05 | Automatic test method for on-site no-load characteristic of large phase modulator |
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| CN110118931A true CN110118931A (en) | 2019-08-13 |
| CN110118931B CN110118931B (en) | 2020-06-02 |
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Citations (8)
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|---|---|---|---|---|
| JPH07245998A (en) * | 1994-03-09 | 1995-09-19 | Hitachi Ltd | Starter of generation facility provided with brushless exciter |
| JP2850096B2 (en) * | 1994-05-30 | 1999-01-27 | 東洋電機製造株式会社 | Inverter control method with constant measurement setting function |
| CN1551484A (en) * | 2003-04-24 | 2004-12-01 | 开关磁阻驱动有限公司 | Rotor position determination in a switched reluctance machine |
| US20120182040A1 (en) * | 2011-01-19 | 2012-07-19 | Hitachi, Ltd. | Method of testing partial discharge of rotating electrical machine driven by inverter |
| CN105281632A (en) * | 2014-07-23 | 2016-01-27 | 江苏风达为新能源科技有限公司 | Current coordination control method of hybrid excitation motor |
| CN105317555A (en) * | 2014-07-31 | 2016-02-10 | 通用电气公司 | Synchronous Condenser |
| CN106849180A (en) * | 2017-01-11 | 2017-06-13 | 国家电网公司 | A kind of large-scale phase modifier starts grid-connected control method |
| CN106908724A (en) * | 2017-03-02 | 2017-06-30 | 国家电网公司 | A kind of large-scale phase modifier scene no-load characteristic measurement method |
-
2018
- 2018-02-05 CN CN201810111400.8A patent/CN110118931B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07245998A (en) * | 1994-03-09 | 1995-09-19 | Hitachi Ltd | Starter of generation facility provided with brushless exciter |
| JP2850096B2 (en) * | 1994-05-30 | 1999-01-27 | 東洋電機製造株式会社 | Inverter control method with constant measurement setting function |
| CN1551484A (en) * | 2003-04-24 | 2004-12-01 | 开关磁阻驱动有限公司 | Rotor position determination in a switched reluctance machine |
| US20120182040A1 (en) * | 2011-01-19 | 2012-07-19 | Hitachi, Ltd. | Method of testing partial discharge of rotating electrical machine driven by inverter |
| CN105281632A (en) * | 2014-07-23 | 2016-01-27 | 江苏风达为新能源科技有限公司 | Current coordination control method of hybrid excitation motor |
| CN105317555A (en) * | 2014-07-31 | 2016-02-10 | 通用电气公司 | Synchronous Condenser |
| CN106849180A (en) * | 2017-01-11 | 2017-06-13 | 国家电网公司 | A kind of large-scale phase modifier starts grid-connected control method |
| CN106908724A (en) * | 2017-03-02 | 2017-06-30 | 国家电网公司 | A kind of large-scale phase modifier scene no-load characteristic measurement method |
Non-Patent Citations (2)
| Title |
|---|
| SUN XIANGDONG等: "Research on the control of phase-shift controlled high-frequency link cycloconverter", 《THE 4TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE, 2004. IPEMC 2004》 * |
| 陶骞等: "特高压直流工程大型调相机组启动调试及关键技术", 《中国电力》 * |
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