CN107942153A - The lookup method of Li Dehuafu frequency converter failures - Google Patents
The lookup method of Li Dehuafu frequency converter failures Download PDFInfo
- Publication number
- CN107942153A CN107942153A CN201710204343.3A CN201710204343A CN107942153A CN 107942153 A CN107942153 A CN 107942153A CN 201710204343 A CN201710204343 A CN 201710204343A CN 107942153 A CN107942153 A CN 107942153A
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- frequency converter
- failure
- power cell
- dehuafu
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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
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of lookup method of Li Dehuafu frequency converter failures, comprise the following steps：First, failure logging is exported, failure possible cause is listed one by one；2nd, listed reason is investigated, eventually finds true cause；3rd, it is determined as a certain power cell fault of frequency converter；4th, failure final process.Frequency converter failure problem can directly be judged by service personnel by the present invention, rely on producer not too much；Shorten fault handling time, reduce increase of the enterprise due to production cost caused by shutdown.
Description
Technical field
The present invention relates to frequency converter failure elimination technique field, is specially a kind of lookup side of Li Dehuafu frequency converter failures
Method.
Background technology
Frequency converter is that power frequency supply (50Hz or 60Hz) is transformed into the AC power of various frequencies, to realize the change of motor
The equipment of speed operation, wherein control circuit complete control to main circuit, and rectification circuit is by convert alternating current into direct current, direct current
Output of the intermediate circuit to rectification circuit carries out smothing filtering, and inverter circuit is by direct current another mistake into alternating current.
With high pressure subsidiary engine frequency converter largely coming into operation in factory, very big tribute is made for factory's energy-saving and emission-reduction work
Offer, thus frequency converter run reliably and with long-term and frequency converter break down after search and processing time length, directly affect work
The reliability service of factory.But factory repair and maintenance personnel, the fault detect means that can be done to frequency converter at the scene are limited, mostly according to
Carried out maintenance by producer technical staff to factory, or the fault element of suspection is returned into factory and is detected.On the one hand frequency conversion is extended
Device recovers the time of normal operation, and another aspect deflecting adds the production cost of factory.
Therefore it provides it is a kind of can quick frequency converter the method that is excluded of failure, being one is worth research
The problem of.
The content of the invention
In order to overcome above-mentioned deficiency of the prior art, the present invention is directed to the failure of Li Dehuafu frequency converters, discloses one
Kind can realize the method quickly searched the failure of Li Dehuafu frequency converters.
The object of the present invention is achieved like this：
The lookup method of Li Dehuafu frequency converter failures, comprises the following steps：
First, failure logging is exported, failure possible cause is listed one by one；2nd, listed reason is investigated, eventually found really
Reason；3rd, it is determined as a certain power cell fault of frequency converter；4th, failure final process.
The failure logging include 1), frequency converter major control plate failure；2), Frequency Converter Control power module failure；
3), some power cell fault of frequency converter；
Described investigates listed reason, including excludes the possibility of frequency converter major control plate failure：More frequency converter is believed
Number adjustment plate and master control borad carry out test run.If frequency converter start-stop is normal, therefore exclude the possibility of this failure；
The Frequency Converter Control power module failure investigation, including the 5V power supplys on Main Control Tank power panel are measured, voltage is
3.5V, should be normally more than 4.5V.Power panel is replaced, frequency converter failure still has, therefore can exclude the possibility of this failure；
Some power cell fault of frequency converter, is specially determined as a certain power cell fault of frequency converter：By frequency converter export to
The outlet of motor is thrown away, and the connecting line between each power cell output of frequency converter is removed.High pressure on frequency converter, test are each
The output waveform and voltage of power cell, see whether waveform and voltage are normal, if the more other unit waveforms of some unit are inconsistent,
Voltage is higher or relatively low then unit may be trouble unit.
Failure final process, including frequency converter failure power cell is replaced, the power cell after upper Hi-pot test replacement
Output waveform, output waveform is normal at this time, and frequency converter on-load preliminary operation, frequency converter start and stop are normal, and normally input is transported afterwards for acceleration and deceleration
OK.
Positive beneficial effect：Frequency converter failure problem can directly be judged by service personnel by the present invention, but
Divide and rely on producer；Shorten fault handling time, reduce increase of the enterprise due to production cost caused by shutdown.
Brief description of the drawings
Fig. 1 is the output waveform of other power cells；
Fig. 2 is the output waveform of B4 power cells.
Embodiment
With reference to specific embodiment, the present invention is described further：
First, failure logging is exported, failure possible cause is listed one by one；2nd, listed reason is investigated, eventually found really
Reason；3rd, it is determined as a certain power cell fault of frequency converter；4th, failure final process.
The failure logging include 1), frequency converter major control plate failure；2), Frequency Converter Control power module failure；
3), some power cell fault of frequency converter；
Described investigates listed reason, including excludes the possibility of frequency converter major control plate failure：More frequency converter is believed
Number adjustment plate and master control borad carry out test run.If frequency converter start-stop is normal, therefore exclude the possibility of this failure；
The Frequency Converter Control power module failure investigation, including the 5V power supplys on Main Control Tank power panel are measured, voltage is
3.5V, should be normally more than 4.5V.Power panel is replaced, frequency converter failure still has, therefore can exclude the possibility of this failure；
Some power cell fault of frequency converter, is specially determined as a certain power cell fault of frequency converter：By frequency converter export to
The outlet of motor is thrown away, and the connecting line between each power cell output of frequency converter is removed.High pressure on frequency converter, test are each
The output waveform and voltage of power cell, see whether waveform and voltage are normal, if the more other unit waveforms of some unit are inconsistent,
Voltage is higher or relatively low then unit may be trouble unit.
Failure final process, including frequency converter failure power cell is replaced, the power cell after upper Hi-pot test replacement
Output waveform, output waveform is normal at this time, and frequency converter on-load preliminary operation, frequency converter start and stop are normal, and normally input is transported afterwards for acceleration and deceleration
OK.
Embodiment 1
09 divides certain company to coagulate a liter pump frequency conversion device (model during September in 2014 19 days 12：HARSVERT-A06/080 weight event in) running
Barrier tripping.
Operating condition before fault trip：Running frequency is that to feed back frequent rate be 20.44HZ to 20.38Hz, input current
9.59A, output current 18.8A, input voltage 6.27KV, output voltage 2.32KV, the given normal operation of frequency converter open loop simulation.
Operating condition after fault trip：Running frequency is that the frequent rate of 20.38Hz feedbacks is 0HZ, and frequency converter input, output are electric
Stream, input, output voltage are 0, and frequency convertor system weight failure, PLC stop commands are sent, and frequency converter is shut down.
8.1 it is as follows to export frequency converter failure record：
The 8.2 access bright books of converter technology number, which list the reason for causing weight failure, to be had：
8.2.1 external fault causes frequency converter to trip；
8.2.2 frequency converter major control plate failure；
8.2.3 Frequency Converter Control power module failure；
8.2.4 some power cell fault of frequency converter.
Reason listed by 8.3 pairs is investigated, and eventually finds true cause.
8.3.1 station service 6kV busbar voltages, electric current stabilization are without fluctuation, condensate system operation before checking frequency converter tripping
Normally without interlock trip signal, exclude the frequency converter caused by external fault reason and trip.
8.3.2 the possibility of frequency converter major control plate failure is excluded：By frequency converter signal adjustment plate and master control borad tear open to
Tested with model frequency converter.As a result it is frequency converter start-stop, acceleration and deceleration are normal, therefore can exclude the possibility of this failure.
8.3.3 the possibility of converter power supply module failure is excluded：The 5V power supplys on Main Control Tank power panel are measured, voltage is
3.5V, should be normally more than 4.5V.Because the converter power supply plate spare part has stopped production, can not be purchased.Therefore old profit is repaiied
Give up one piece of 5V power module, which is replaced, and the power panel fixed is returned dress, frequency converter failure still has, therefore can arrange
Except the possibility of this failure.
8.3.4 it is determined as a certain power cell fault of frequency converter：
A, frequency converter high-voltage switch gear is removed to the wiring of frequency converter transformer, is made a record.
B, removing frequency converter transformer tertiary winding, (wire size is to the wiring of wind turbine：111、113、115、120).
C, pressure regulator is connected to frequency converter transformer tertiary winding binding post, i.e., former (111,113,115) place.
D, the outlet for exporting frequency converter to motor is thrown away, by the connection between 21 level power cell outputs of frequency converter
Line is removed.
E, frequency converter is switched on the spot, given way is set to computer and gives.
F, short circuit frequency converter high pressure ready signal PLC is opened into I1.5 (603 and I1.5 short circuits).
G, reaffirm that experimental wiring shuts the cabinet door of frequency converter, transformer case of all personnel away from frequency converter after errorless
And power unit cabinet.
H, pressure regulator input power transmission, adjusts the output of pressure regulator to 380V.
I, frequency converter is started in frequency converter man-machine interface.
J, frequency converter is risen into 30Hz, the voltage and waveform at each power cell both ends of three-phase of Measurement for Inverter.Send out at this time
The existing not a half a wave head of the more other power cells of B4 unit waveforms, as shown in Figure 1 and Figure 2, therefore lockable power cell for this
Failure.
K, the input of pressure regulator is disconnected, is discharged each power cell, replaces fault power unit, again upper high pressure
The output waveform of power cell after test replacement, output waveform is normal at this time, recovers all wiring of frequency converter.
L, converter parameter, clearly existing working site are checked.
M, upper high pressure and on-load debugging are carried out to frequency converter, frequency converter start and stop are normal, and acceleration and deceleration are normal.
8.4 troubleshootings finish, and input frequency converter operation, observes frequency converter operating condition.
Frequency converter failure problem can directly be judged by service personnel by the present invention, rely on producer not too much；Contracting
Short fault handling time, reduces increase of the enterprise due to production cost caused by shutdown.
Above case study on implementation is merely to illustrate the preferred embodiment of the present invention, but the present invention is not limited to above-mentioned embodiment party
Formula, in the knowledge that the field those of ordinary skill possesses, that is made within the spirit and principles in the present invention is any
Modification, equivalent substitute and improvement etc., are regarded as the protection domain of the application.
Claims (6)
1. the lookup method of Li Dehuafu frequency converter failures, it is characterised in that comprise the following steps：First, failure logging is exported, will
Failure possible cause is listed one by one；2nd, listed reason is investigated, eventually finds true cause；3rd, it is determined as frequency converter
One power cell fault；4th, failure final process.
2. the lookup method of Li Dehuafu frequency converter failures according to claim 1, it is characterised in that：The failure note
Record includes 1）, frequency converter major control plate failure；2）, Frequency Converter Control power module failure；3）, frequency converter some power cell
Failure.
3. the lookup method of Li Dehuafu frequency converter failures according to claim 1, it is characterised in that described to listed
Reason is investigated, including excludes the possibility of frequency converter major control plate failure：More frequency converter signal adjustment plate and master control borad
Carry out test run;If frequency converter start-stop is normal, therefore exclude the possibility of this failure.
4. the lookup method of Li Dehuafu frequency converter failures according to claim 2, it is characterised in that the frequency converter
The 5V power supplys in power module failure investigation, including measurement Main Control Tank power panel are controlled, voltage 3.5V, should be normally 4.5V
More than;Power panel is replaced, frequency converter failure still has, therefore can exclude the possibility of this failure.
5. the lookup method of Li Dehuafu frequency converter failures according to claim 2, it is characterised in that determine frequency converter
A power cell fault, is specially determined as a certain power cell fault of frequency converter：Frequency converter is exported to the outlet of motor
Throw away, the connecting line between each power cell output of frequency converter is removed;
High pressure on frequency converter, tests the output waveform and voltage of each power cell, sees whether waveform and voltage are normal, if some
The more other unit waveforms of unit are inconsistent, and voltage is higher or relatively low then unit may be trouble unit.
6. the lookup method of Li Dehuafu frequency converter failures according to claim 1, it is characterised in that failure is finally located
Reason, including replace frequency converter failure power cell, upper Hi-pot test replace after power cell output waveform, output wave at this time
Shape is normal, and frequency converter on-load preliminary operation, frequency converter start and stop are normal, put into operation after acceleration and deceleration are normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710204343.3A CN107942153A (en) | 2017-03-31 | 2017-03-31 | The lookup method of Li Dehuafu frequency converter failures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710204343.3A CN107942153A (en) | 2017-03-31 | 2017-03-31 | The lookup method of Li Dehuafu frequency converter failures |
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| CN107942153A true CN107942153A (en) | 2018-04-20 |
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| CN201710204343.3A Pending CN107942153A (en) | 2017-03-31 | 2017-03-31 | The lookup method of Li Dehuafu frequency converter failures |
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|---|---|---|---|---|
| CN203166735U (en) * | 2013-01-21 | 2013-08-28 | 江苏力普电子科技有限公司 | High voltage frequency converter capable of automatically diagnosing and recording faults |
| CN104135143A (en) * | 2014-07-25 | 2014-11-05 | 内蒙古包钢钢联股份有限公司 | Fault removal operating method for high-voltage frequency converter |
| CN204258592U (en) * | 2014-10-28 | 2015-04-08 | 上海开缔能源科技有限公司 | Can the frequency converter of record trouble data |
| CN105259437A (en) * | 2015-10-14 | 2016-01-20 | 株洲变流技术国家工程研究中心有限公司 | Method for achieving fault analysis of high-voltage frequency converter |
| CN106199253A (en) * | 2016-06-29 | 2016-12-07 | 武汉广源动力科技有限公司 | A kind of high voltage transducer power unit remote fault diagnosis method |
| CN106199252A (en) * | 2016-06-29 | 2016-12-07 | 武汉广源动力科技有限公司 | A kind of high voltage transducer power unit remote failure diagnosis system |
| CN106410646A (en) * | 2016-11-07 | 2017-02-15 | 河钢股份有限公司邯郸分公司 | Fault rapid determining and processing operation method of AC-DC-AC high-voltage frequency converter |
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2017
- 2017-03-31 CN CN201710204343.3A patent/CN107942153A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203166735U (en) * | 2013-01-21 | 2013-08-28 | 江苏力普电子科技有限公司 | High voltage frequency converter capable of automatically diagnosing and recording faults |
| CN104135143A (en) * | 2014-07-25 | 2014-11-05 | 内蒙古包钢钢联股份有限公司 | Fault removal operating method for high-voltage frequency converter |
| CN204258592U (en) * | 2014-10-28 | 2015-04-08 | 上海开缔能源科技有限公司 | Can the frequency converter of record trouble data |
| CN105259437A (en) * | 2015-10-14 | 2016-01-20 | 株洲变流技术国家工程研究中心有限公司 | Method for achieving fault analysis of high-voltage frequency converter |
| CN106199253A (en) * | 2016-06-29 | 2016-12-07 | 武汉广源动力科技有限公司 | A kind of high voltage transducer power unit remote fault diagnosis method |
| CN106199252A (en) * | 2016-06-29 | 2016-12-07 | 武汉广源动力科技有限公司 | A kind of high voltage transducer power unit remote failure diagnosis system |
| CN106410646A (en) * | 2016-11-07 | 2017-02-15 | 河钢股份有限公司邯郸分公司 | Fault rapid determining and processing operation method of AC-DC-AC high-voltage frequency converter |
Non-Patent Citations (1)
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| 孙鹏: "攀钢提钒炼钢厂转炉区域利德华福高压变频器的故障诊断", 《四川冶金》 * |
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