CN109596287A - Capacitor oil compensates rational test method under a kind of High aititude - Google Patents

Capacitor oil compensates rational test method under a kind of High aititude Download PDF

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Publication number
CN109596287A
CN109596287A CN201811525162.1A CN201811525162A CN109596287A CN 109596287 A CN109596287 A CN 109596287A CN 201811525162 A CN201811525162 A CN 201811525162A CN 109596287 A CN109596287 A CN 109596287A
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CN
China
Prior art keywords
capacitor
tank
oil
temperature
pressure
Prior art date
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.)
Pending
Application number
CN201811525162.1A
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Chinese (zh)
Inventor
雷乔舒
孟亚运
邓光昭
梁晓
刘吉尧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WUXI SUNKING POWER CAPACITOR CO Ltd
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WUXI SUNKING POWER CAPACITOR CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by WUXI SUNKING POWER CAPACITOR CO Ltd filed Critical WUXI SUNKING POWER CAPACITOR CO Ltd
Priority to CN201811525162.1A priority Critical patent/CN109596287A/en
Publication of CN109596287A publication Critical patent/CN109596287A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
    • G01M3/3236Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
    • G01M3/3272Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical means
    • G01B5/30Measuring arrangements characterised by the use of mechanical means for measuring the deformation in a solid, e.g. mechanical strain gauge
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F17/00Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies

Abstract

The present invention discloses capacitor oil under a kind of High aititude and compensates rational test method, passes through the insulation oil temperature inside platinum resistance monitoring capacitor;By the volume change of insulating oil under theoretical calculation limiting temperature, the volume change of survey calculation tank of power capacitor, comparison show whether the compensation of tank of power capacitor interior oil is reasonable;By the pressure change inside installing pressure vacuum gauge sensing capacitor, obtain inside tank of power capacitor cavity or gas leakage whether occur.The present invention monitors the reasonability of box shell oil compensation in capacitor production process, the insulating oil total amount inside injection tank of power capacitor can rationally be controlled, deform tank of power capacitor in zone of reasonableness under limit high/low temperature, obtain effective compensation, guarantee that capacitor in High aititude and day and night temperature major region reliability of operation, extends capacitor service life.

Description

Capacitor oil compensates rational test method under a kind of High aititude
Technical field
The present invention relates to capacitor oils under a kind of High aititude to compensate rational test method.
Background technique
High-voltage power capacitor box shell is to be made into one by way of bending and welding by the stainless steel plate of 1.5mm~2mm A tank wall, then a bottom, the box shell of formation are welded below wall.Box shell, weldering are packed into after the completion of the core manufacture of capacitor internal The capacitor of upper cover plate, a semi-finished product is completed.Punching has an oil filler point on box shell wall, take out by this oil filler point true Empty and injection insulating oil, seal closure of burn-oning again after the completion of oiling, the manufacturing process of a capacitor, which is calculated, to be completed.Due to insulating oil With the characteristic expanded with heat and contract with cold, in the capacitor of high altitude localities operation, since the temperature difference is big, air pressure is low, insulating oil is in capacitor It expands with heat and contract with cold in box shell, in the design and processes stage, it is necessary to consider reasonable collocation structure design, otherwise will appear capacitor Operation can generate the discontented and serious indent of cavity, oil under limit low temperature, and operation will appear serious bulge etc. under limit high temperature Situation.Currently, temporarily non-avaible is illustrated the design of high-voltage power capacitor box shell oil collocation structure, each capacitor producer is usual Oily compensation way is designed according to experience.
Summary of the invention
Due to being full of insulating oil inside high-voltage power capacitor unit, it is affected by temperature, insulating oil expands with heat and contract with cold, and will cause Box shell has certain deformation, and the part of deformation need to be compensated by insulating oil, and for above situation, the present invention provides a kind of high Capacitor oil compensates rational test method under height above sea level, by test capacitors internal oil pressure and oil temperature, to capacitor box Whether shell deforms volume and carries out oily compensation calculation, to judge the reasonability of oily Compensation Design, and meet and run ring under High aititude The requirement in border.
To achieve the above object, the present invention adopts the following technical solutions:
Capacitor oil compensates rational test method under a kind of High aititude, by exhausted inside platinum resistance monitoring capacitor Edge oil temperature;Pass through the volume change of insulating oil under theoretical calculation limiting temperature, the volume change of survey calculation tank of power capacitor Amount, comparison show whether the compensation of tank of power capacitor interior oil is reasonable;Pass through the pressure inside installing pressure vacuum gauge sensing capacitor Power variation obtains inside tank of power capacitor cavity or gas leakage whether occur.
Further, it comprising the following specific steps
Step 1 installs platinum resistance in capacitor internal, passes through the insulation oil temperature inside platinum resistance monitoring capacitor;
Step 2 obtains the insulation oil volume inside tank of power capacitor according to the weight before and after note insulating oil:Under limit high temperature and low temperature condition, the volume change of tank of power capacitor built-in electrical insulation oil: △ Vy is calculated separately =kVy △ t, wherein k is the coefficient of expansion 7.4 × 10 of insulation oil volume-4/ k, △ t=limiting temperature-sealing capacitor insulation Oil temperature;
Step 3 measures the deformation of tank of power capacitor, based on rectangular pyramid approximation under limit high temperature, low temperature condition respectively Calculate the volume change of tank of power capacitor:Wherein, H and B is respectively the big face height of tank of power capacitor and width Degree, △ h are the variable quantity of tank of power capacitor bulge or indent, are obtained by calliper to measure;
Step 4, under limit high temperature, the variable quantity △ h of tank of power capacitor bulge is more than the big face width of tank of power capacitor 12% or more, then it is determined as tank of power capacitor bulge, oil compensation is unreasonable;Under limit low temperature, the volume of tank of power capacitor becomes When change amount △ Vk is less than the volume change △ Vy of insulating oil, then it is determined as tank of power capacitor indent, oil compensation is unreasonable;
Step 5 installs pressure vacuum gauge on capacitor tank wall, passes through pressure vacuum gauge monitoring capacitor internal pressure Variation, determine whether capacitor internal occurs that gas permeation enters inside box shell and whether the compensation of box shell oil insufficient occurs Cavity.
Further, in step 5, when the sealing of capacitor room temperature, internal pressure 0, vacuum pressure list index is carved in O Spend position;When gas occurs in capacitor internal, internal pressure polarization pressure, vacuum pressure list index is biased to positive pressure direction;Work as electricity When occurring cavity inside container, the inclined negative pressure of internal pressure, vacuum pressure list index is biased to negative pressure direction.
The utility model has the advantages that
The present invention monitors the reasonability of box shell oil compensation in capacitor production process, can rationally control injection capacitor box Insulating oil total amount inside shell deforms tank of power capacitor in zone of reasonableness under limit high/low temperature, obtains effective compensation, guarantees Capacitor extends capacitor service life in High aititude and day and night temperature major region reliability of operation.
Detailed description of the invention
Fig. 1 is that test capacitors oil compensates rational structural schematic diagram under High aititude of the invention;
In figure: 1- box shell, 2- core, 3- insulating oil, 4- platinum resistance, 5- pressure vacuum gauge, 6- ball valve.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Insulating oil is full of in high-voltage power capacitor box shell, since insulating oil has the characteristic expanded with heat and contract with cold, in High aititude Area, running environment have the characteristics that air pressure is low, day and night temperature is big, at different temperature, due to expanding with heat and contract with cold for insulating oil, Capacitor box shell volume can follow the volume change of insulating oil and change, and the present invention proposes that capacitor oil compensates under a kind of High aititude Rational test method can be obtained by the changeable volume of insulating oil under detection different temperatures, calculable capacitor box shell deformation quantity Whether compensate out in tank of power capacitor interior oil reasonable;In addition, tank of power capacitor is sealing structure, it can be by sensing capacitor The pressure change in portion understands in the case where High aititude day and night temperature is big, air pressure is low, and whether tank of power capacitor internal pressure can be sent out Changing.Specific embodiment is as follows:
First, the circular hole of a φ 3.2mm is opened on 1 cover board of tank of power capacitor, is placed above the core 2 in insulating oil 3 Platinum resistance 4, platinum resistance 4 are drawn from the circular hole of φ 3.2mm, and circular hole peripheral sealing is good, and platinum resistance 4 monitors show case by temperature controller Oil temperature inside shell 1.When oil temperature reaches 30 ± 5 DEG C, capacitor carries out sealing operation;
Second, by the insulating oil total weight (weighing capacitor weight before and after oiling respectively, you can get it) of injection, calculate (volume calculation formula is the volume of tank of power capacitor 1 built-in electrical insulation oil);It, can under limit high temperature, low temperature condition To be calculated by the following formula the variable quantity of oil volume: △ Vy=kVy △ t, wherein k be oil the coefficient of cubical expansion 7.4 × 10-4/ k, △ t=limiting temperature-sealing capacitor oil temperature;
Third measures 1 deformation of box shell under limit high temperature, low temperature condition, goes out 1 volume of box shell by rectangular pyramid approximate calculation and becomes Change amount:Wherein, H, B are the big face height of box shell 1, width, and △ h is obtained by calliper to measure, wherein capacitor The variable quantity of 1 bulge of box shell is △ h1, and the variable quantity of 1 indent of tank of power capacitor is △ h2;
4th, under limit high temperature, whether tank of power capacitor 1 there is serious bulge, usually regards as being more than that capacitor is wide 12% or more of degree direction is (i.e.), it is that user from the appearance cannot received bulge;And in pole It limits under low temperature, 1 indent of tank of power capacitor, when being less than the volume change △ Vy of insulating oil such as 1 volume change △ Vk of box shell, case It is discontented to will appear cavity, oil inside shell 1, so as to cause the damage that capacitor is run, structure is as shown in Figure 1.
5th, the circular hole of a φ 6mm is opened on 1 cover board of tank of power capacitor, welding ball valve 6 above circular hole assembles vacuum Pressure gauge 5.Ball valve 6 is in close state when capacitor vacuumizes and inject insulating oil, is completed and when insulating oil injects by box shell 1 After all places are sealed, ball valve 6 is opened, the pressure of capacitor internal is read by pressure vacuum gauge 5.Pass through monitoring capacitor The variation of internal pressure, assessment capacitor internal whether occur gas permeation enter inside box shell and box shell oil compensation whether Deficiency leads to box shell internal cavities, so that pressure changes.When capacitor room temperature seals, internal pressure zero, vacuum pressure List index is in O graduation position.When gas occurs in capacitor internal, internal pressure polarization pressure, vacuum pressure list index is biased to just Press direction;When cavity occurs in capacitor internal, the inclined negative pressure of internal pressure, vacuum pressure list index is biased to negative pressure direction, structure As shown in Figure 1.
Limiting the scope of the invention, those skilled in the art should understand that, in technical solution of the present invention On the basis of, the various modifications or variations that can be made by those skilled in the art with little creative work still of the invention Within protection scope.

Claims (3)

1. capacitor oil compensates rational test method under a kind of High aititude, which is characterized in that monitor capacitor by platinum resistance Insulation oil temperature inside device;Pass through the volume change of insulating oil under theoretical calculation limiting temperature, survey calculation tank of power capacitor Volume change, comparison obtain tank of power capacitor interior oil compensation it is whether reasonable;Capacitor is detected by installing pressure vacuum gauge Pressure change inside device obtains inside tank of power capacitor cavity or gas leakage whether occur.
2. capacitor oil compensates rational test method under High aititude according to claim 1, which is characterized in that it is wrapped Include step in detail below:
Step 1 installs platinum resistance in capacitor internal, passes through the insulation oil temperature inside platinum resistance monitoring capacitor;
Step 2 obtains the insulation oil volume inside tank of power capacitor according to the weight before and after note insulating oil:? Under limit high temperature and low temperature condition, the volume change of tank of power capacitor built-in electrical insulation oil: △ Vy=kVy △ t is calculated separately, In, k is the coefficient of expansion 7.4 × 10 of insulation oil volume-4/ k, △ t=limiting temperature-sealing capacitor insulation oil temperature;
Step 3 measures the deformation of tank of power capacitor under limit high temperature, low temperature condition respectively, by rectangular pyramid approximate calculation electricity The volume change of container box shell:Wherein, H and B is respectively the big face height of tank of power capacitor and width, △ H is the variable quantity of tank of power capacitor bulge or indent, is obtained by calliper to measure;
Step 4, under limit high temperature, the variable quantity △ h of tank of power capacitor bulge is more than the 12% of the big face width of tank of power capacitor More than, then it is determined as tank of power capacitor bulge, oil compensation is unreasonable;Under limit low temperature, the volume change of tank of power capacitor When △ Vk is less than the volume change △ Vy of insulating oil, then it is determined as tank of power capacitor indent, oil compensation is unreasonable;
Step 5 installs pressure vacuum gauge on capacitor tank wall, passes through the change of pressure vacuum gauge monitoring capacitor internal pressure Change, determine capacitor internal whether occur gas permeation enter inside box shell and box shell oil compensation whether there is cavity in deficiency.
3. capacitor oil compensates rational test method under High aititude according to claim 2, which is characterized in that described In step 5, when the sealing of capacitor room temperature, internal pressure 0, vacuum pressure list index is in O graduation position;When in capacitor When gas occurs in portion, internal pressure polarization pressure, vacuum pressure list index is biased to positive pressure direction;When cavity occurs in capacitor internal When, the inclined negative pressure of internal pressure, vacuum pressure list index is biased to negative pressure direction.
CN201811525162.1A 2018-12-13 2018-12-13 Capacitor oil compensates rational test method under a kind of High aititude Pending CN109596287A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4791805A (en) * 1985-06-07 1988-12-20 Expertek, Inc. Fuel tank leak detection apparatus
CN103267681A (en) * 2013-04-25 2013-08-28 同济大学 Method and device for measuring oil volume elastic modulus
CN203191178U (en) * 2013-02-01 2013-09-11 东莞市永强汽车制造有限公司 Tank truck surge resistant air bag leak detection device
CN105492240A (en) * 2013-07-26 2016-04-13 奥迪股份公司 Energy storage arrangement featuring temperature-related switching on of status monitoring
CN106394839A (en) * 2016-05-25 2017-02-15 哈尔滨工程大学 Active protection method of unmanned underwater vehicle based on sealing property detection of sealed cabin
CN107134368A (en) * 2017-04-26 2017-09-05 合容电气股份有限公司 110kV Assembled high-voltage shunted capacitors

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4791805A (en) * 1985-06-07 1988-12-20 Expertek, Inc. Fuel tank leak detection apparatus
CN203191178U (en) * 2013-02-01 2013-09-11 东莞市永强汽车制造有限公司 Tank truck surge resistant air bag leak detection device
CN103267681A (en) * 2013-04-25 2013-08-28 同济大学 Method and device for measuring oil volume elastic modulus
CN105492240A (en) * 2013-07-26 2016-04-13 奥迪股份公司 Energy storage arrangement featuring temperature-related switching on of status monitoring
CN106394839A (en) * 2016-05-25 2017-02-15 哈尔滨工程大学 Active protection method of unmanned underwater vehicle based on sealing property detection of sealed cabin
CN107134368A (en) * 2017-04-26 2017-09-05 合容电气股份有限公司 110kV Assembled high-voltage shunted capacitors

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