CN103617896B - A kind of method for maintaining of power capacitor - Google Patents
A kind of method for maintaining of power capacitor Download PDFInfo
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- CN103617896B CN103617896B CN201310579568.9A CN201310579568A CN103617896B CN 103617896 B CN103617896 B CN 103617896B CN 201310579568 A CN201310579568 A CN 201310579568A CN 103617896 B CN103617896 B CN 103617896B
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Abstract
The invention discloses a kind of method for maintaining of power capacitor, be applicable to keep in repair all power capacitors that is underproof or that damage, comprise the following steps: first, open the seal closure of power capacitor to be repaired, insulation impregnating agent is poured out; Then, power capacitor device body is taken out; Then, the lead-out wire of power capacitor device body is warded off out; Then, power capacitor device body is put into vacuum tank not heat and vacuumize process; Then check power capacitor device body failure cause, according to failure cause, corresponding maintenance is carried out to device body; Then, the main insulating layer outside power capacitor device body is changed; Then, power capacitor device body cased and weld porcelain vase lead-out wire; Finally, the process of vacuumize oil stain is carried out to the power capacitor after vanning.The method for maintaining of power capacitor provided by the invention can improve the performance of the power capacitor after maintenance effectively.
Description
Technical field
The present invention relates to power capacitor technical field, particularly a kind of method for maintaining of power capacitor.
Background technology
Power capacitor (powercapacitor) refers to the capacitor for electric power system and electrical equipment.
Power capacitor, in the use and operating process of reality, may cause it to damage due to the impact of various factors, in order to cost-saving, generally can keep in repair the power capacitor damaged, can again come into operation as far as possible.
Existing at present the method that power capacitor keeps in repair to be comprised the following steps:
First, open the seal closure of power capacitor to be repaired, insulation impregnating agent is poured out;
Then, case shell is changed; Particularly, take out power capacitor device body, the lead-out wire of power capacitor device body is warded off out, and power capacitor device body is positioned in the new case shell after a replacing;
Finally, vacuumize impregnation process is carried out to the power capacitor after vanning.
But, if cause the breakage of capacitor porcelain vase or the distortion of case shell in the process due to transport assembling, the impact that reprocessed product are subject to actual environment in the process run (comprises temperature, humidity, thunderbolt etc.), overvoltage in operating process, overcurrent, under voltage, the impact of the circuit such as undercurrent and cause power capacitor to damage because of the harmful effect of other components and parts in electric wiring, if it is bigger than normal that capacitors of then these damages there will be dielectric loss by current existing maintenance process in the process of maintenance, office puts defective over the ground, the situations such as defective are put in interpolar office, thus have impact on the qualification rate of maintenance.
Therefore, a kind of capacitor Rework Technics of the best how is provided to become technical barrier.
Coherent reference data is:
1. document: the analysis of causes of power capacitor most common failure and respective handling.Author: continuous profit China.Source: volume the 2nd phase electric power journal calendar year 2001 the 16th.
2. document: the Common Failures of capacitor and technology.Author: Lv Junxia.Source: " power capacitor and reactive power compensation ", 2010,31 (4): 61-64.
3. document: power capacitor most common failure problem and solution.Author: Huang forward.Source: " Scientific and Technical Communication ", 2012 (10).
Summary of the invention
The object of the present invention is to provide a kind of method for maintaining of power capacitor, to improve the maintenance qualification rate of power capacitor.
In order to realize above object, the invention provides a kind of method for maintaining of power capacitor, being applicable to keep in repair all power capacitors that is defective or that damage, comprising the following steps:
Open the seal closure of power capacitor to be repaired, insulation impregnating agent is poured out;
Take out power capacitor device body;
The lead-out wire of power capacitor device body is warded off out;
Power capacitor device body is put into vacuum tank not heat and vacuumize process;
Check power capacitor device body failure cause, according to failure cause, corresponding maintenance is carried out to device body;
Change the main insulating layer outside power capacitor device body;
Power capacitor device body is cased and welds porcelain vase lead-out wire;
Vacuumize impregnation process is carried out to the power capacitor after vanning.
Wherein, the described process conditions vacuumizing process that do not heat are: vacuum degree is 0 ~ 10 handkerchief; Processing time is greater than 12 hours.
Preferably, the use electric pressure of described power capacitor is greater than 1000V.
Wherein, describedly defectively refer to that the electricity function index of power capacitor is defective.
Preferably, described electricity function index defectively comprise that capacitance is bigger than normal, dielectric loss is bigger than normal, over the ground office put defective or interpolar office and put defective.
Wherein, described damage comprises distortion or power capacitor at the bottom of the breakage of power capacitor porcelain vase, case lid distortion, case and occurs the situation of component breakdown.
Wherein, described vacuumize impregnation process comprises the following steps:
Power capacitor after vanning is put into vacuum tank, and tank body is heated;
Tank body is vacuumized, makes the vacuum degree in tank body be less than below 5 handkerchiefs;
In tank body, inject insulation impregnating agent, power capacitor is flooded; And
Vacuum breaker, takes out power capacitor from vacuum tank.
Wherein, described power capacitor device body failure cause comprises one in the inner rosin joint of power capacitor device body, solder skip, component breakdown or combination.
The present invention, owing to adopting above technical scheme, makes it compared with prior art, has following advantage and good effect:
1) the present invention does not heat vacuumize process by power capacitor device body being put into vacuum tank, thus the oil in power capacitor device body and air can be discharged, and make to form oil residual in the element of power capacitor device body less; The method of the oil in prior art in filtering power capacitor device body is generally carry out oil strain operation in its natural state, but process can cause the fuse of power capacitor device body to expand in its natural state, thus impacts the performance of power capacitor; And power capacitor device body is put into vacuum tank and do not heat and vacuumize process, both can the agent of filtering insulation impregnating, prevent again the fuse of power capacitor device body from expanding, thus improve the performance of the power capacitor after maintenance;
2) main insulating layer outside power capacitor device body is changed by the present invention, thus ensure that the insulation effect of the main insulating layer outside power capacitor device body, improves the power capacitor electrical property after maintenance;
3) power capacitor to be repaired is re-started vacuumize impregnation process by the present invention, thus the gas can extracted out in medium and moisture, reduce the dielectric loss of the power capacitor after maintenance.
Accompanying drawing explanation
The flow chart of the method for maintaining of the power capacitor that Fig. 1 provides for the embodiment of the present invention.
Embodiment
Be described in further detail below in conjunction with the method for maintaining of the drawings and specific embodiments to the power capacitor that the present invention proposes.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only for object that is convenient, the aid illustration embodiment of the present invention lucidly.
Refer to Fig. 1, the flow chart of the method for maintaining of the power capacitor that Fig. 1 provides for the embodiment of the present invention, as shown in Figure 1, the method for maintaining of power capacitor provided by the invention, be applicable to keep in repair all power capacitors that is defective or that damage, comprise the following steps:
S101: the seal closure opening power capacitor to be repaired, pours out insulation impregnating agent.
Wherein, insulation impregnating agent is a kind of insulating oil, and it is used as dielectric material in power capacitor.
S102: take out power capacitor device body.
Wherein, in the present patent application, by power capacitor fuse through wire bonds and external insulation coated after the device that formed be called power capacitor device body, and power capacitor fuse is made up of each element.
S103: the lead-out wire of power capacitor device body is warded off out.
The object of this step is separated by the lead-out wire of the lead-out wire of power capacitor device body with casing (shell) porcelain vase, thus power capacitor device body can be separated with casing, to facilitate the follow-up operation to power capacitor device body.
S104: power capacitor device body is put into vacuum tank and do not heat and vacuumize process.
Wherein, the described process conditions vacuumizing process that do not heat are: vacuum degree is 0 ~ 10 handkerchief; Processing time is greater than 12 hours.And in evacuation process, do not carry out heating operation in tank.
Do not heat vacuumize process by power capacitor device body being put into vacuum tank, thus the oil in power capacitor device body and air can be discharged, make to form oil residual in the element of power capacitor device body less; And the method for oil in currently available technology in filtering power capacitor device body is generally carry out oil strain operation in its natural state, but process can cause the fuse of power capacitor device body to expand in its natural state, thus the performance of power capacitor is impacted; And power capacitor device body is put into vacuum tank and do not heat and vacuumize process, both can the agent of filtering insulation impregnating, prevent again the fuse of power capacitor device body from expanding, thus improve the performance of the power capacitor after maintenance.
S105: check power capacitor device body failure cause, according to failure cause, corresponding maintenance is carried out to device body.
Particularly, power capacitor device body failure cause comprises one in the inner rosin joint of power capacitor device body, solder skip, component breakdown or combination.The corresponding respectively maintenance measures of these failure causes is:
If there is the situation of rosin joint, solder skip, then in maintenance process, re-start welding, firmly connect to make each element;
If there is the situation of component breakdown, then in maintenance process, again change corresponding element.
S106: change the main insulating layer outside power capacitor device body.
In the present patent application, main insulating layer outside power capacitor device body uses insulating paper, why at power capacitor device body outer cladding insulating paper, be in order to by power capacitor device body and external insulation, prevent power capacitor device body and the external world from having undesirable electric connection.
The present invention by being changed by the main insulating layer outside power capacitor device body to be repaired, thus ensure that the insulation effect of the main insulating layer outside power capacitor device body, improves the power capacitor electrical property after maintenance.
S107: power capacitor device body is cased and welds porcelain vase lead-out wire.
Particularly, this step comprises and power capacitor device body is loaded casing, and is welded with the lead-out wire of casing porcelain vase by the lead-out wire of power capacitor device body.
S108: vacuumize impregnation process is carried out to the power capacitor after vanning.
Particularly, vacuumize impregnation process comprises the following steps:
First, the power capacitor after vanning is put into vacuum tank, and heats tank body, be usually heated to 75 ~ 100 DEG C, heating time is tens of hours;
Then, tank body is vacuumized, make the vacuum degree in tank body be less than below 5 handkerchiefs;
Then, in tank body, inject insulation impregnating agent, flood power capacitor, dip time is 5 ~ 10 hours; And
Vacuum breaker, takes out power capacitor from vacuum tank.
The present invention is by re-starting vacuumize impregnation process by power capacitor to be repaired, thus the gas can extracted out in medium and moisture, reduce the dielectric loss of the power capacitor after maintenance.
In embodiments of the present invention, this power capacitor refers to the power capacitor using electric pressure to be greater than 1000V.
Wherein, power capacitor is defective refers to that the electricity function index of power capacitor is defective; Electricity function index is defective specifically comprises that capacitance is bigger than normal, dielectric loss is bigger than normal, over the ground office put defective or interpolar office and put defective.
Wherein, power capacitor damage comprises distortion or power capacitor at the bottom of the breakage of power capacitor porcelain vase, case lid distortion, case and occurs the situation of component breakdown.
Above-described embodiment is only illustrate for convenience of description, and the interest field that the present invention advocates should be as the criterion with described in claim, but not is only limitted to described embodiment.
Obviously, those skilled in the art can carry out various change and modification to invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. a method for maintaining for power capacitor, is applicable to keep in repair all power capacitors that is defective or that damage, it is characterized in that, comprise the following steps:
Open the seal closure of power capacitor to be repaired, insulation impregnating agent is poured out;
Take out power capacitor device body;
The lead-out wire of power capacitor device body is warded off out;
Power capacitor device body is put into vacuum tank not heat and vacuumize process;
Check power capacitor device body failure cause, according to failure cause, corresponding maintenance is carried out to device body;
Change the main insulating layer outside power capacitor device body;
Power capacitor device body is cased and welds porcelain vase lead-out wire;
Vacuumize impregnation process is carried out to the power capacitor after vanning.
2. the method for maintaining of power capacitor as claimed in claim 1, it is characterized in that, the described process conditions vacuumizing process that do not heat are: vacuum degree is 0 ~ 10 handkerchief; Processing time is greater than 12 hours.
3. the method for maintaining of power capacitor as claimed in claim 1 or 2, it is characterized in that, the use electric pressure of described power capacitor is greater than 1000V.
4. the method for maintaining of power capacitor as claimed in claim 1 or 2, is characterized in that, describedly defectively refers to that the electricity function index of power capacitor is defective.
5. the method for maintaining of power capacitor as claimed in claim 4, is characterized in that, described electricity function index is defective comprises that capacitance is bigger than normal, dielectric loss is bigger than normal, over the ground office put defective or interpolar office and put defective.
6. the method for maintaining of power capacitor as claimed in claim 1 or 2, is characterized in that, described damage comprises distortion or power capacitor at the bottom of the breakage of power capacitor porcelain vase, case lid distortion, case and occurs the situation of component breakdown.
7. the method for maintaining of power capacitor as claimed in claim 1 or 2, it is characterized in that, described vacuumize impregnation process comprises the following steps:
Power capacitor after vanning is put into vacuum tank, and tank body is heated;
Tank body is vacuumized, makes the vacuum degree in tank body be less than below 5 handkerchiefs;
In tank body, inject insulation impregnating agent, power capacitor is flooded; And
Vacuum breaker, takes out power capacitor from vacuum tank.
8. the method for maintaining of power capacitor as claimed in claim 1 or 2, is characterized in that, described power capacitor device body failure cause comprises one in the inner rosin joint of power capacitor device body, solder skip, component breakdown or combination.
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| CN201310579568.9A CN103617896B (en) | 2013-11-19 | 2013-11-19 | A kind of method for maintaining of power capacitor |
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| CN201310579568.9A CN103617896B (en) | 2013-11-19 | 2013-11-19 | A kind of method for maintaining of power capacitor |
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| CN103617896B true CN103617896B (en) | 2016-04-27 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3008784B2 (en) * | 1994-07-11 | 2000-02-14 | 日新電機株式会社 | Manufacturing method of oil-filled capacitor |
| CN102013342A (en) * | 2010-09-26 | 2011-04-13 | 上海思源电力电容器有限公司 | Capacitor vacuum drying and dipping treatment system and capacitor vacuum drying and dipping treatment method |
| CN102253263A (en) * | 2011-03-31 | 2011-11-23 | 中国西电电气股份有限公司 | Single-pumping-and-single-filling-type vacuum treatment installation of capacitive voltage divider and method thereof |
| CN102842441A (en) * | 2012-08-28 | 2012-12-26 | 苏州工业园区和顺电气股份有限公司 | Immersion treatment process for power capacitor |
| CN102856084A (en) * | 2012-08-28 | 2013-01-02 | 苏州工业园区和顺电气股份有限公司 | Processing method for vacuum drying impregnation of capacitor |
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- 2013-11-19 CN CN201310579568.9A patent/CN103617896B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3008784B2 (en) * | 1994-07-11 | 2000-02-14 | 日新電機株式会社 | Manufacturing method of oil-filled capacitor |
| CN102013342A (en) * | 2010-09-26 | 2011-04-13 | 上海思源电力电容器有限公司 | Capacitor vacuum drying and dipping treatment system and capacitor vacuum drying and dipping treatment method |
| CN102253263A (en) * | 2011-03-31 | 2011-11-23 | 中国西电电气股份有限公司 | Single-pumping-and-single-filling-type vacuum treatment installation of capacitive voltage divider and method thereof |
| CN102842441A (en) * | 2012-08-28 | 2012-12-26 | 苏州工业园区和顺电气股份有限公司 | Immersion treatment process for power capacitor |
| CN102856084A (en) * | 2012-08-28 | 2013-01-02 | 苏州工业园区和顺电气股份有限公司 | Processing method for vacuum drying impregnation of capacitor |
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