CN107317483A - A kind of method for reducing high-tension motor high voltage frequency converter module failure rate - Google Patents
A kind of method for reducing high-tension motor high voltage frequency converter module failure rate Download PDFInfo
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- CN107317483A CN107317483A CN201710584464.5A CN201710584464A CN107317483A CN 107317483 A CN107317483 A CN 107317483A CN 201710584464 A CN201710584464 A CN 201710584464A CN 107317483 A CN107317483 A CN 107317483A
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- China
- Prior art keywords
- frequency converter
- high voltage
- humidity
- module
- power model
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20927—Liquid coolant without phase change
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20945—Thermal management, e.g. inverter temperature control
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
A kind of method for reducing high-tension motor high voltage frequency converter module failure rate, adjusts the frequency converter Cooling water system method of operation, when environment temperature is less than 10 DEG C, reduces one group of cooling blower operation and control cooling water inlet flow;Meet fine and humidity less than 58% when, weekly select one day 8:00 to 17:00 unlatching Transducer Room gate is aerated, and reduces indoor humidity;Dehumidifier is installed, indoor humidity is controlled below 65%;Frequency converter first stops Cooling water system before stopping transport;It is tight that subsidiary engine checks that its inlet baffle is closed before starting；Before run with load again is needed after frequency converter stoppage in transit is small more than 72, the no-load running of more than 2 hours is carried out to high voltage converter, power model electric capacity is pre-charged, while carrying out driving damp to electronic component, prevent module damage.The present invention effectively reduces the fault rate of high-tension motor high voltage frequency converter module under height above sea level, humidity height and the big environment of day and night temperature, reaches less than 5%.
Description
Technical field
The present invention relates to a kind of method for reducing high-tension motor high voltage frequency converter module failure rate, belong to electrical technology
Field.
Background technology
Power Plant in Western Kweichow present position height above sea level is 1200 meters, 14.2 DEG C of average temperature of the whole year, mean annual humidity 85%.It is used
6kV high voltage converters are HARSVERT-A series of products, and in addition to solidifying pump frequency conversion device uses air cooling mode, remaining high voltage converter is equal
Using closed cycle sky-water-cooling pattern.Moist environment and the larger temperature difference has a strong impact on the safe operation of frequency converter, only 2014
29 power models driving bypass failures just occur for the factory in 1 to July of year.By analysis, it is determined that causing high voltage frequency converter power mould
The reason for block failure is：
1st, day and night temperature is big, and temperature influences larger to electronic component.
2nd, ambient humidity is high（Up to 95%）, and humidity is changed greatly round the clock and during Changes in weather.
3rd, field apparatus is not all according to plateau lectotype selection.
4th, moisture preventive measure is not in place when frequency converter is stopped transport causes electronic component to make moist
5th, frequency converter starts is started using a key 14s, and the capacitor charging time in module is too short, easily causes module failure.
6th, because fan outlet door is not closed completely close, motor starts in Reversion, and braking moment is excessive, starts moment electronic
Machine becomes generator operation, causes module over-voltage fault.
Influence after module failure is：
1), malfunctioning module number≤2（Larger booster fan≤3 of capacity）When, the frequency converter auto by pass malfunctioning module
Concurrent light fault alarm, it is necessary to power model is changed after load down.
2), malfunctioning module number>At 3, device weight fault trip causes boiler flameout or even shutdown.
3), device isolation, unit stop working（Or tripping operation）Security risk is big in recovery process afterwards.
4), power model maintenance price is expensive.
The content of the invention
The technical problems to be solved by the invention are:How to be dropped under height above sea level, humidity height and the big environment of day and night temperature
The fault rate of low high-tension motor high voltage frequency converter module.
In order to solve the above technical problems, the present invention is realized using following technical scheme：
1st, adjustment frequency converter sky-water-cooling system method of operation, when environment temperature is less than 10 DEG C, reduces by one group of cooling blower operation
And control cooling water inlet flow, make indoor temperature control in 20 ± 5 DEG C of frequency converter module optimum operation temperature, eliminate temperature pair
The influence of power model;
2nd, meet fine and humidity less than 58% when, weekly select one day 8:00 to 17:00 unlatching Transducer Room gate enters
Row ventilation, reduces indoor humidity;
The 3rd, dehumidifier is installed, indoor humidity is controlled below 65%, influence of the reduction humidity to power model;
4th, frequency converter first stops sky-water-cooling system before stopping transport, and frequency converter stops to add in cabinet top cooling blower, input cabinet after stopping transport 4 hours
Hot device, influence of the reduction thermal shocking to power model;
5th, check that its inlet baffle is closed tightly before subsidiary engine starts, back-emf causes power module of converter overvoltage when preventing from starting
Failure；
6th, before run with load again is needed after frequency converter stoppage in transit is small more than 72, the sky of more than 2 hours is carried out to high voltage converter
Carrying row, is pre-charged to power model electric capacity, while carrying out driving tide to electronic component, prevents module damage.
Using the beneficial effect of above-mentioned technical proposal:
The present invention effectively reduces high-tension motor high voltage frequency converter under height above sea level, humidity height and the big environment of day and night temperature
The fault rate of module, reaches less than 5%.
Brief description of the drawings
Fig. 1 is condensate pump high voltage converter wiring diagram.
Fig. 2 is primary air fan and air-introduced machine high voltage converter wiring.
Fig. 3 is booster fan high voltage converter wiring diagram.
Embodiment
1st, the situation of change of Transducer Room and outdoor temperature is tracked by field operator, frequency converter air water cooling is carried out cold
But the control management of blower fan, one group of Cooling water system can only put into a cooling blower when normal, when environment temperature is less than 10
DEG C when, every frequency converter reduces by one group of cooling blower operation, and Cooling water system cooling water inlet flow is adjusted according to temperature conditions,
Make indoor temperature control in 20 ± 5 DEG C of frequency converter module optimum operation temperature, eliminate influence of the temperature to power model.
2nd, when outside air temperature is relatively low, frequency converter transformer station high-voltage side bus temperature is less than 40 DEG C, disabled by field operator solidifying
The external ventilation blower of pump frequency conversion device simultaneously tracks, observes frequency converter running situation and record；When frequency converter is stopped transport and " power frequency " is run,
Disable the external ventilation blower of solidifying pump frequency conversion device.
3rd, the daily tour to 6kV frequency converters is strengthened, timely discovering device defect and hidden danger are reduced because of frequency converter failure pair
The influence of unit operation, when outside humidity is larger but during not high temperature, carries out frequency converter cooling blower quantity and surface cooler control.
Meet fine and outside humidity less than 58% when, selected weekly by field operator one day 8:00 to 17:00 opens change
Frequency device room gate is aerated, the air in displacement Transducer Room, it is ensured that indoor humidity is less than 65%.
4th, for extreme weather outside humidity for a long time be maintained at 90% and more than, the higher actual conditions of indoor humidity are adopted
The mode of dehumidifying is aided in used in frequency converter indoor location dehumidifier, the running situation of dehumidifier is inspected periodically by maintainer, is protected
Card frequency converter indoor humidity can be controlled below 65%, influence of the reduction humidity to power model.When solidifying pump frequency conversion device stoppage in transit 48
During the hour above, ventilation filter screen grid is sealed using plastic cloth by maintainer, it is to avoid moisture largely enters frequency conversion
Device cabinet causes power model failure.
5th, the control for carrying out frequency converter heater and blower fan by field operator is managed, and is stopped immediately once frequency converter is stopped transport
Cooling water system system is transported, frequency converter stops cabinet top cooling blower after stopping transport 4 hours, put into cabinet internal heater and check that heater is
No normal heating, puts into cabinet top fan and exits heater, put into again after converting operation is normal in advance before frequency converter puts into operation
Cooling water system must put into fortune again in motor；Reduce influence of the thermal shocking to power model.
6th, check that its inlet baffle and the closing of solidifying pump valve are tight by scene operation person on duty before subsidiary engine starts, motor is not
There is Reversion, back-emf causes power module of converter over-voltage fault when preventing from starting.
7th, frequency converter stop transport it is small more than 72 after need run with load again before, with operations staff and maintainer pair
High voltage converter carries out the no-load running of more than 2 hours, power model electric capacity is pre-charged, while being driven to electronic component
Tide, reduces module damage probability.Carry out the charging work of single-conversion device spare module, every mould each season by maintainer
The block charging interval is not less than 30min, it is to avoid over-voltage fault caused by electric capacity overdischarge.
8th, carried out every year once to frequency converter Cooling water system cleaning work with reference to unit maintenance by maintainer, by running
Department liable, carries out the backwash work of single-conversion device Cooling water system every half a year, it is ensured that frequency converter air water cooling radiating effect
Live service requirement is met, indoor temperature is reduced.
Claims (1)
1. a kind of method for reducing high-tension motor high voltage frequency converter module failure rate, it is characterised in that step is as follows：
（1）, the adjustment frequency converter sky-water-cooling system method of operation, when environment temperature is less than 10 DEG C, reduce by one group of cooling blower fortune
Row and control cooling water inlet flow, make indoor temperature control in 20 ± 5 DEG C of frequency converter module optimum operation temperature, eliminate temperature
Influence to power model;
（2）, meet fine and humidity less than 58% when, weekly select one day 8:00 to 17:00 opens Transducer Room gate
It is aerated, reduces indoor humidity;
（3）, dehumidifier is installed, indoor humidity is controlled below 65%, influence of the reduction humidity to power model;
（4）, frequency converter first stop sky-water-cooling system before stopping transport, frequency converter stops cabinet top cooling blower after stopping transport 4 hours, put into cabinet
Heater, influence of the reduction thermal shocking to power model;
（5）, subsidiary engine check that its inlet baffle is closed tight before starting, back-emf causes power module of converter mistake when preventing from starting
Press failure；
（6）, frequency converter stop transport it is small more than 72 after need run with load again before, to high voltage converter carry out more than 2 hours
No-load running, is pre-charged to power model electric capacity, while carrying out driving tide to electronic component, prevents module damage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710584464.5A CN107317483A (en) | 2017-07-18 | 2017-07-18 | A kind of method for reducing high-tension motor high voltage frequency converter module failure rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710584464.5A CN107317483A (en) | 2017-07-18 | 2017-07-18 | A kind of method for reducing high-tension motor high voltage frequency converter module failure rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107317483A true CN107317483A (en) | 2017-11-03 |
Family
ID=60178646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710584464.5A Pending CN107317483A (en) | 2017-07-18 | 2017-07-18 | A kind of method for reducing high-tension motor high voltage frequency converter module failure rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107317483A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110843577A (en) * | 2019-11-20 | 2020-02-28 | 深圳市永联科技股份有限公司 | Charging pile power intelligent control method and device suitable for high altitude |
-
2017
- 2017-07-18 CN CN201710584464.5A patent/CN107317483A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 赵才望: "降低发电厂6kV辅机高压变频器功率模块故障率", 《贵州电力技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110843577A (en) * | 2019-11-20 | 2020-02-28 | 深圳市永联科技股份有限公司 | Charging pile power intelligent control method and device suitable for high altitude |
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Application publication date: 20171103 |
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