CN106128046A - Monitoring Power Transformer state, the method for work of the gradable warning system do not reported to the police - Google Patents

Monitoring Power Transformer state, the method for work of the gradable warning system do not reported to the police Download PDF

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CN106128046A
CN106128046A CN201610424200.9A CN201610424200A CN106128046A CN 106128046 A CN106128046 A CN 106128046A CN 201610424200 A CN201610424200 A CN 201610424200A CN 106128046 A CN106128046 A CN 106128046A
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detection module
concentration
detection
production rate
hydrocarbon content
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不公告发明人
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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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital
    • G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital using a threshold to release an alarm or displaying means
    • G01N33/0065—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital using a threshold to release an alarm or displaying means using more than one threshold
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/185—Electrical failure alarms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means

Abstract

A kind of Monitoring Power Transformer state, the method for work of the gradable warning system do not reported to the police, it includes ECU unit, memory unit, three detection modules and warning and display unit, it is characterized in that, described three detection modules include concentration of component detection module, hydrocarbon content detection module, gas production rate detection module；Wherein concentration of component detection module, hydrocarbon content detection module, gas production rate detection module is connected with ECU unit respectively, accept the control instruction of ECU unit and feed back coherent signal to ECU unit, memory unit is connected with ECU unit, reports to the police and display unit is responsible for that the alarm signal that ECU unit exports carries out outside display and is processed.This invention takes primary concentration warning operation and warning progressive operation two-stage judge process, measurement inaccuracy or the instability produced because of multiple factors impact can be avoided to the full extent, can classification not report to the police exactly, prompting operator carry out the activities such as corresponding maintenance.

Description

Monitoring Power Transformer state, the method for work of the gradable warning system do not reported to the police
Technical field
The present invention relates to the warning system of a kind of Monitoring Power Transformer abnormality, belong to technical field of electric power transmission.
Background technology
Along with developing rapidly of China's power industry, power transformer is just towards supertension, and jumbo direction is developed, electricity Power net is the most just being organized into the bulk power grid that huge regionality is the most trans-regional, and the confession mutually of transferring electricity from the west to the east, north and south, a whole nation network Electrical network general layout is formed.Along with increase and the expansion of electrical network scale of power equipment capacity, the safe operation to power system Having higher requirement with power supply reliability, the various countries' large-scale blackout in recent years occurred also has beaten police for China's power system Clock.With a very important position in power system of transformator, is one of electrical equipment most important and the most expensive in power system, Its security reliability run is directly connected to the safety and stablization of power system.Therefore, the most large-scale electricity of transformator is improved The safe and reliable operation tool of whole electrical network is of great significance by power transformator reliability of operation.Transformer oil dissolves Gas analysis (DGA) technology is considered as the effective means of Diagnosis for Power Transformer initial failure always.It can find in time The insulation fault that inside transformer exists, may advantageously facilitate by periodic maintenance mode to the transition of State Maintenance mode, thus is subject to To being widely applied.The principle of DGA technology is that generation speed based on the specific hydrocarbon gas of any one becomes with temperature Change, at a certain temperature, often have the factor of created gase of a certain gas that maximum occurs, along with temperature raises, the gas that factor of created gase is maximum Body is followed successively by CH4, C2H6, C2H4, C2H2, H2, C0, C02.
Owing to transformer oil has excellent heat radiation and insulating properties, therefore oil-immersed power transformer is in power system Quoted widely.In normal running, transformator can be in mechanical stress and the impact of the various factors such as heat, electricity Under the most aging, and generate some imflammable gas.If transformator exists internal Hidden fault, trouble location discharges Energy can accelerate the cracking of insulant, promotes the content of oil dissolved gas and gas production rate to be greatly improved.By obtaining Transformer oil sample, uses the method for gas chromatogram just can obtain the content of each component of oil dissolved gas, thus to transformation The health status of device is made assessment or the transformator that there is exception carries out the analysis of failure condition.Therefore, in transformer oil Oil-filled transformer fault diagnosis is had great significance by dissolved gas analysis.
Three-ratio method as one of DGA technology has played certain effect in engineering reality, but owing to ratio is compiled Code is limited, and fault type is the most simply divided into some classical types, it is impossible to contains all fault types in actual motion, compiles There is ambiguity in the mapping relations that code character is closed between failure mode, simple man-to-man mapping can not the most objectively embody The complicated Rhizoma Nelumbinis haveing between sign and fault closes relation, there is also the most smart of some gas contents being likely to result in due to various factors Really, and then to fault type erroneous judgement is formed.Fault type is mainly judged, due to fault by the most current three-ratio method Type judges relatively coarse, discloses trouble location and fault severity level the most deeply, and therefore decision makers is difficult to by three Ratio method diagnostic result determines that complete Strategies of Maintenance.
It is therefore desirable to improve the DGA technology used at present to improve the precision of Transformer Fault Diagnosis and Stability, it is to avoid occur erroneous judgement operation to produce harmful effect.
Summary of the invention
In order to solve above-mentioned technical problem, the present invention proposes the warning system of a kind of Monitoring Power Transformer abnormality, This warning system can avoid measurement inaccuracy or the instability produced because of multiple factors impact to the full extent, it is possible to accurately Ground classification is not reported to the police, and prompting operator carry out the activities such as corresponding maintenance.
For achieving the above object, the technology of the present invention is contemplated that, in order to avoid measuring the maloperation produced, farthest Ensureing to judge alarm accuracy, the warning system of the Monitoring Power Transformer abnormality of the present invention takes primary concentration warning behaviour Making and warning progressive operation two-stage judge process, the technological means of employing is:
Scheme 1, the warning system of a kind of Monitoring Power Transformer abnormality, it includes ECU unit, memory unit, three Detection module and warning and display unit, it is characterised in that described three detection modules include concentration of component detection module, hydrocarbon Content detection module, gas production rate detection module；Wherein concentration of component detection module, hydrocarbon content detection module, gas production rate is examined Survey module to be connected with ECU unit respectively, accept the control instruction of ECU unit and feed back coherent signal, bin to ECU unit Unit is connected with ECU unit, reports to the police and display unit is responsible for that the alarm signal that ECU unit exports carries out outside display and is processed； Wherein said concentration of component detection module can the concentration of each gas component of cycle detection, and by each detectable concentration value Di with Ultimate value Di0 corresponding to this gas component compares successively, and the concentration once obtaining the detection of this gas component goes beyond the limit of Value, then carry out the counting operation of enumerator N, equal or exceed K once enumerator N, then it represents that have K group gas component beyond Ultimate value, then carry out starting warning progressive operation.
Scheme 2, warning system according to the Monitoring Power Transformer abnormality of scheme 1, it is characterised in that each gas Each component includes H2, CH4, C2H4, C2H6, C2H2, total hydrocarbon.
Scheme 3, warning system according to the Monitoring Power Transformer abnormality of scheme 1, it is characterised in that normal conditions Under, K may be configured as K≤6, and preferably 3.
Scheme 4, warning system according to the Monitoring Power Transformer abnormality of scheme 1, it is characterised in that described hydrocarbon contains Amount detection module and gas production rate detection module detect transformator total hydrocarbon content C and total hydrocarbon absolute gas production rate V respectively, C0, C1 represent transformator total hydrocarbon content first threshold and Second Threshold respectively, and V0, V1, V2 represent total hydrocarbon absolute aerogenesis speed respectively Rate first threshold, Second Threshold and the 3rd threshold value, by contrast transformator total hydrocarbon content C and total hydrocarbon absolute gas production rate V with Numerical relation between above-mentioned multiple threshold value judges different alarm level, and wherein C0 and V0 is chosen as empirical value, C1=2～ 3C0, V1=1～2V0 or V2=3～4V0.
Inventing after deliberation, have employed above-mentioned technological means, the single level changing existing transformator warning system judges, carries The accuracy that high transformer abnormality judges；Optimize transformer fault warning system, decrease owing to a variety of causes causes The probability of erroneous judgement maloperation, it is ensured that the accuracy of output alarm condition, the method judged simultaneously also by secondary detection is real Show the further classification to middle rank fault alarm, enhance application and the reliability of warning system.
Accompanying drawing explanation
Fig. 1 is the transmitting transformer structural representation of the present invention；
Fig. 2 is the system schematic of the warning system of the present invention；
Fig. 3 is the enforcement steps flow chart sketch of the warning system of the present invention.
Detailed description of the invention
As it is shown in figure 1, the oil immersed type transmitting transformer structural representation of the present invention, this transformator includes covering whole transformation The transformer shell 1 of device, the insulation fuel tank 2 being connected on transformer shell 1, transformator liner 3, and the master of transmitting transformer Wanting functor winding coil 4 and iron core 5, detection device 6 and thermodetector 7 are positioned at transformer shell 1 top edges, are used for carrying out The detection of related control data, is positioned at insulating oil 10 and the air layer 11 of insulation fuel tank 2.This transformator is in running Can be affected by mechanical stress, temperature, highfield and the various factors such as moisture, oxygen, insulating oil can be in these factors There is carbonization under effect, crack and the various chemical reactions such as oxidation, generate hydrogen, low molecular hydrocarbons compounds, greasy filth, some Oxide and hydrocarbon polymer (X wax), here it is transformer insulation oil deterioration and catabiosis.Under normal circumstances, insulation Oil only generates more minimal amount of gases, within the content of these gases also would generally be maintained at national regulations value.Once transformation Device occurs internal Hidden fault, the energy of trouble point release can accelerate insulating oil decomposition aerogenesis, and gas concentration may be caused to surpass Cross marginal value.And the source of Gases Dissolved in Transformer Oil is extremely complex, transformator the most also can be electric, warm Generating a small amount of gas under the effect of stress, when transformator occurs internal Hidden fault, the energy of trouble point release can accelerate The decomposition aerogenesis of insulant, may be caused gas concentration over-limit condition, therefore substantially can be sentenced by the concentration of gas Disconnected transformer state is the most normal.It is as shown in the table for regulation gas dissolved in oil of power trans-formers ultimate value.
Table Gas in Oil of Transformer concentration of component ultimate value (uL/L)
As in figure 2 it is shown, the warning system of the Monitoring Power Transformer abnormality of the present invention includes ECU unit, memory unit, Three detection modules and warning and display unit, described three detection modules include concentration of component detection module, and hydrocarbon content is examined Survey module, gas production rate detection module.Wherein concentration of component detection module, hydrocarbon content detection module, gas production rate detection module It is connected with ECU unit, accepts the control instruction of ECU unit and feed back various signals, memory unit and ECU to ECU unit Unit connects, and generally also becomes the ingredient of ECU, reports to the police and display unit is responsible for entering the alarm signal of ECU unit output The outside display of row processes.
Utilizing oil dissolved gas concentration to during judging that transformator is whether abnormal, it usually needs by oil dissolved gas The concentration of each component compares with the ultimate value of solution gas concentration in recommended oil, if arbitrary gas concentration over-standard just should Attract great attention.But rely solely on gas concentration value and entirely accurate can not judge whether equipment exists fault, because certain A little non-faulting factors are likely to cause Oil Dissolved Gases Concentration to increase, the gas concentration limit that even more than directive/guide is recommended Value.Report to the police in operation in primary concentration, described concentration of component detection module can the cycle detection each component of each gas (H2, CH4, C2H4, C2H6, C2H2, total hydrocarbon) concentration, and by each concentration value Di and ultimate value Di0 corresponding to this gas component (D10, D20, D30, D40, D50, D60) compares successively, and the concentration once obtaining the detection of this gas component goes beyond the limit of value, Then carrying out the counting operation of enumerator N, once enumerator N equals or exceeds K (under normal circumstances, N, K can be arranged, K≤6, preferably It is 3) time, then it represents that there is K group gas component beyond ultimate value, then carry out starting warning progressive operation, if being measured six After group concentration, enumerator is not up to K value, then enumerator can be at standby mode or clearing waits that next time, detection instruction sent.So One, judged by repeated detection, it is ensured that the accuracy of output alarm condition, it is to avoid owing to the detection of a certain gas component is lost The false alarm by mistake caused.It should be noted that above-mentioned detected components type can select according to situation, it can be three kinds, four kinds Or five kinds etc..
Finding through long-term operating experience, transformer fault is typically to start with the low-yield fault of latency, if leaving Fault Free Development, may finally cause the generation of transformator major accident, owing to gas concentration can only be from a side reflection The running status that transformator is current, and gas production rate reflects the out of order order of severity the most to a certain extent, the present invention's During warning progressive operation, bound gas concentration and gas production rate carry out the most objectively detection to transformer state just Assessment.Described hydrocarbon content detection module and gas production rate detection module detect that transformator total hydrocarbon content C and total hydrocarbon are exhausted respectively To gas production rate V, C0, C1 represent transformator total hydrocarbon content first threshold and Second Threshold respectively, and V0, V1, V2 represent always respectively Hydrocarbon absolute gas production rate first threshold, Second Threshold and the 3rd threshold value, absolute by contrast transformator total hydrocarbon content C and total hydrocarbon Numerical relation between gas production rate V from above-mentioned threshold value judges different alarm level, and these alarm level are divided into slight event Barrier, medium outage and catastrophe failure, in research process, find, in order to refine fault level, middle rank fault can be divided again simultaneously For stable intermediate fault and continuous worsening intermediate fault, the warning of middle rank fault is also easier the erroneous judgement in detection occur The disconnected reduction with accuracy, therefore, the warning system of the present invention is achieved middle rank fault by the method that secondary detection judges The raising of warning accuracy.
Specifically, demonstrate the enforcement steps flow chart sketch of the warning system of the present invention as shown in Figure 3,
First starting warning system, arrange i value, K value and enumerator N reset, wherein i, K are integer, and i=1, K≤6, excellent Elect 3 as, each component of each gas of cycle detection (H2, CH4, C2H4, C2H6, C2H2, total hydrocarbon) in concentration of component detection module Concentration obtain each concentration value Di (D1, D2, D3, D4, D5, D6), and whether judge the concentration value of each gas component successively Beyond respective ultimate value Di0 (D10, D20, D30, D40, D50, D60), once corresponding gas component goes beyond the limit of value, Then carry out enumerator N adds 1 operation, when enumerator N is more than or equal to K, i.e. goes beyond the limit of the gas component quantity of value more than K Time, show that the primary concentration warning operation of warning system is complete, then launch into warning progressive operation；
Detect that transformator total hydrocarbon content C and total hydrocarbon are exhausted respectively at described hydrocarbon content detection module and gas production rate detection module To gas production rate V, by total hydrocarbon content C and absolute gas production rate V and total hydrocarbon content first threshold and Second Threshold C0, C1, total hydrocarbon Definitely gas production rate first threshold, Second Threshold and the 3rd threshold value V0, V1, V2 compare, and judge that total hydrocarbon content C is with exhausted respectively To the interval range residing for gas production rate V, it is judged that show that corresponding fault level is reported to the police.
Wherein it should be noted that C0, the specifically chosen of C1, V0, V1, V2 can be obtained by empirical value, it is also possible to by C0 It is chosen as empirical value, C1=2～3C0, V1=1～2V0 or V2=3～4V0 with V0.
Carry out concrete early warning progressive operation according to following standard to judge,
1). when meeting C ＜ C0 and V ＜ V0, indication transformer is normal, then alarm level is normal condition；
2). when meeting C0 ＜ C ＜ C1 and V ＜ V0, there is Hidden fault in indication transformer, and fault progression is slow, impact More slight, then alarm level is minor failure；
3). when meeting C0 ＜ C ＜ C1 and V0 ＜ V ＜ V1, indication transformer there may exist obvious fault, now needs to carry out Secondary detection total hydrocarbon content C ' and absolute gas production rate V ' determines whether, and needs before secondary detection to postpone the t time, Postponing certain t time, to carry out secondary detection again be the time span in order to increase detection, it is ensured that during detection will not by other because of The impact of element is to improve precision, if still meeting C0 ＜ C ' ＜ C1 and V0 ＜ V ' ＜ V1, now shows to exist relatively stable Medium outage, then alarm level is medium outage (stablizing)；
4). when meeting C0 ＜ C ＜ C1 and V1 ＜ V ＜ V2, indication transformer there may exist obvious fault, now needs to carry out Secondary detection total hydrocarbon content C ' and absolute gas production rate V ' determines whether, and needs before secondary detection to postpone the t time. If still meeting C0 ＜ C ' ＜ C1 and V1 ＜ V ' ＜ V2, now showing to there is the medium outage deteriorated more rapidly, then reporting to the police Grade is medium outage (deterioration)；
5). when meeting C1 ＜ C and V2 ＜ V, there is catastrophe failure in indication transformer, and fault progression deteriorates rapidly, and impact is relatively For seriously, then alarm level is catastrophe failure.
As it has been described above, the warning system of the present invention by primary Concentration Testing realize pre-alarm and bound gas concentration with And the warning progressive operation of gas production rate, optimize transformer fault warning system, decrease the mistake caused due to a variety of causes Sentencing the probability of maloperation, it is ensured that the accuracy of output alarm condition, the method judged simultaneously also by secondary detection achieves Further classification to middle rank fault alarm, enhances application and the reliability of warning system.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, permissible Understand and these embodiments can be carried out multiple change without departing from the principles and spirit of the present invention, revise, replace And modification, meanwhile, the implication such as formula cited by the present invention, symbol (such as sequence mark i, threshold k, enumerator N etc.) is ability Accustomed meanings in territory, the scope of the present invention is limited by claims and equivalent thereof.The accompanying drawing be simultaneously given in description Being only used as the convenience that description understands, claim does not carry out any restriction, flow chart is also only as understanding simultaneously Simplification that is convenient and that make processes, and does not cause the defect etc. of insufficient disclosure.

Claims (1)

1. a method of work for the warning system of Monitoring Power Transformer abnormality, described warning system includes ECU unit, Memory unit, three detection modules and warning and display unit, it is characterised in that described three detection modules include component Concentration detection module, hydrocarbon content detection module, gas production rate detection module；Wherein concentration of component detection module, hydrocarbon content detects Module, gas production rate detection module is connected with ECU unit respectively, accepts the control instruction of ECU unit and feeds back to ECU unit Coherent signal, memory unit is connected with ECU unit, reports to the police and display unit is responsible for entering the alarm signal of ECU unit output The outside display of row processes；
Described method of work, including: concentration of component detection module can the concentration of each gas component of cycle detection, and will be every Individual detectable concentration value Di compares successively with ultimate value Di0 corresponding to this gas component, once obtains the inspection of this gas component The concentration surveyed goes beyond the limit of value, then carry out the counting operation of enumerator N, equal or exceed K once enumerator N, then it represents that have K Group gas component beyond ultimate value, then carries out starting warning progressive operation；K=3；
Described hydrocarbon content detection module and gas production rate detection module detect that transformator total hydrocarbon content C and total hydrocarbon are absolute respectively Gas production rate V, C0, C1 represent transformator total hydrocarbon content first threshold and Second Threshold respectively, and V0, V1, V2 represent total hydrocarbon respectively Definitely gas production rate first threshold, Second Threshold and the 3rd threshold value, is definitely produced by contrast transformator total hydrocarbon content C and total hydrocarbon Numerical relation between gas speed V from above-mentioned multiple threshold values judges different alarm level, and wherein C0 and V0 is chosen as experience Value, C1=2～3C0, V2=3～4V0；
Carry out concrete early warning progressive operation according to following standard to judge:
1). when meeting C ＜ C0 and V ＜ V0, indication transformer is normal, then alarm level is normal condition；
2). when meeting C0 ＜ C ＜ C1 and V ＜ V0, there is Hidden fault in indication transformer, and fault progression is slow, impact More slight, then alarm level is minor failure；
3). when meeting C0 ＜ C ＜ C1 and V0 ＜ V ＜ V1, indication transformer there may exist obvious fault, now needs to carry out Secondary detection total hydrocarbon content C ' and absolute gas production rate V ' determines whether, and needs before secondary detection to postpone the t time, Postponing certain t time, to carry out secondary detection again be the time span in order to increase detection, it is ensured that during detection will not by other because of The impact of element is to improve precision, if still meeting C0 ＜ C ' ＜ C1 and V0 ＜ V ' ＜ V1, now shows to exist relatively stable Medium outage, then alarm level is medium outage；
4). when meeting C0 ＜ C ＜ C1 and V1 ＜ V ＜ V2, indication transformer there may exist obvious fault, now needs to carry out Secondary detection total hydrocarbon content C ' and absolute gas production rate V ' determines whether, and needs before secondary detection to postpone the t time； If still meeting C0 ＜ C ' ＜ C1 and V1 ＜ V ' ＜ V2, now showing to there is the medium outage deteriorated more rapidly, then reporting to the police Grade is medium outage；
5). when meeting C1 ＜ C and V2 ＜ V, there is catastrophe failure in indication transformer, and fault progression deteriorates rapidly, and impact is relatively For seriously, then alarm level is catastrophe failure.
CN201610424200.9A 2014-07-16 2014-07-16 Monitoring Power Transformer state, the method for work of the gradable warning system do not reported to the police Pending CN106128046A (en)

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CN201610416019.3A Pending CN105976577A (en) 2014-07-16 2014-07-16 Alarm system for monitoring abnormal state of power transformer
CN201610410724.2A Pending CN106124884A (en) 2014-07-16 2014-07-16 The warning system of Monitoring Power Transformer abnormality
CN201610412301.4A Pending CN105976575A (en) 2014-07-16 2014-07-16 Operation method of alarm system for monitoring abnormal state of power transformer
CN201610424200.9A Pending CN106128046A (en) 2014-07-16 2014-07-16 Monitoring Power Transformer state, the method for work of the gradable warning system do not reported to the police
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CN201610412462.3A Pending CN105976576A (en) 2014-07-16 2014-07-16 Alarm system with relatively high reliability for monitoring power transformer abnormity state
CN201610411229.3A Pending CN105976574A (en) 2014-07-16 2014-07-16 Alarm system for monitoring power transformer abnormity state and realizing graded alarm
CN201610412309.0A Pending CN106093306A (en) 2014-07-16 2014-07-16 A kind of Monitoring Power Transformer abnormality, the gradable warning system do not reported to the police
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