Background technology
DC power system in the power plant and transformer station of power system is main by supervising device, charging device, electric power storagePond group, dc bus and feeding line portion etc. are constituted, and are relay protection in plant stand, control loop, monitoring device and communication equipment etc.Reliable working power guarantee is provided, to the safe and stable operation of power infrastructures, very important effect is played.
In recent years, how comprehensively the failure that power system DC power system occurs by battery problem is increasing,Diagnosing the incipient fault of battery turns into the task of top priority.
Conventional method has storage battery platen press, accumulator internal resistance method, storage battery checking volumetric method etc..
Storage battery platen press, the voltage of battery is often saved using the measurement in real time of accumulator voltage monitoring device, according to electric power storageThe difference condition of each section battery tension in the group of pond, larger to deviation is paid close attention to, when single-unit battery tension exceedes alarmThreshold values is abnormal.The use popularity rate of the method is higher, but acquisition precision is not high, and less stable, often occurs reporting by mistake and leakingThe situation of report, only with directive significance, it is impossible to the problem of reflection battery is present comprehensively, particularly potential problems.
Accumulator internal resistance method, the internal driving of battery is often saved by direct-current discharge method or the measurement of exchange injection method, andInitial data first during by being used with battery is compared, and obtains the difference of the internal resistance of each section battery in batteriesSituation, is paid close attention to for deviation is larger, is exception when bias ratio exceedes certain limit.The method is needed to existing direct currentSystem and Battery measuring apparatus are reequiped, and cost is higher, and the popularity rate of practical application is relatively low, and accumulator internal resistance data are onlyLimit is to surveyed batteries longitudinal comparison, it is impossible to carry out across comparison, and measurement multiplicity is relatively low, with certain limitation,As storage battery platen press, belong to more single method of testing.
Batteries, using constant-current discharge equipment, are carried out 100% verification property electric discharge by storage battery checking volumetric method, ifThen judge that this group storage battery is unqualified when its off-capacity 80%.Normally 1-2 carries out 1 time 100% verificationProperty electric discharge, to ensure that battery performance meets requirement, but it is actual waste time and energy when performing, and close on 2 cores and hold time intervalsLonger (- 24 months 12 months), the indiscoverable potential problems within interval time, and it is generally late when pinpointing the problems.
In the case of existing at present, Normal practice is to use some way in the above method to be managed battery, becauseAll had some limitations for every kind of method, can not truly and comprehensively reflect the potential problems that battery exists in itself.
Particularly when batteries carry out charge/discharge, if indivedual batteries have problem in whole group, parameter is monitored(voltage or internal resistance) deviation is larger, and monitoring device then produces alarm.Now, generally there are two kinds of processing methods：One is automaticStop current charge/discharge, cause whole group battery-operated abnormal to prevent indivedual accumulator properties from deteriorating.If at unmannedReason is abnormal and recovers to former charge/discharge state, then batteries are in the state for not completing complete charge/discharge process, i.e.,There is the situation of charge less；Two are to continue with carrying out current charge/discharge, are then needed to handle the problem of indivedual batteries are present in timeTo intervene manually to stop, and otherwise will continue current charge/discharge process, until whole charge/discharge process is completed, nowThe problem of easily causing indivedual batteries is more serious, that is, occurs overcharging/crossing situation about putting, but charge/discharge process is completedReport alarm signal can largely disappear, and hidden danger remains unchanged presence.
Most of transformer station is unattended station at this stage, according to existing straight-flow system operating standard, every 3 months direct currentsSystem must be automatically timed to batteries fills.When indivedual batteries go wrong or straight-flow system other parts are differentOften (such as charger output abnormality, monitoring sampling abnormal), if disposing abnormal according to foregoing two kinds of processing methods, because can not andWhen obtain the concern and processing of operation maintenance personnel, the problem of causing battery aggravates, and constantly deteriorates, and causes battery longPhase is in charge less electricity/overcharge/over-discharge state, and then influences battery whole group performance.
In summary, at this stage, battery on-line monitoring generally existing monitoring method is single and easy wrong report and fails to reportSituation, operation maintenance personnel is negligent of daily management and abnormal investigation, by existing accumulator cell management method, when indivedual batteries occurAbnormal (truly, report by mistake, fail to report), the problem of existing can not be handled in time, cause failure and hidden danger to find in time, andHidden danger may be caused to expand, and then the major hidden danger for causing batteries whole group to fail.
Existing accumulator monitoring means can not accurately reflect the actual performance and state of battery comprehensively, can not be in the timeThe tracking of comprehensive performance and state is carried out Deng various dimensions, when causing the battery to occur abnormal, charge/discharge or by force is interruptedCharge/discharge, fails to be handled in current time node, and the abnormal long-term influence caused for battery is not noted, andThe potential faults brought are influenceed for a long time.
The content of the invention
The embodiments of the invention provide a kind of multi-Dimensional parameters straight-flow system accumulator cell management method and device, for batteryGroup is from different dimensions, and description and embodiment according to multi-parameter to battery condition progress fully and completely can improve system fortuneRow reliability, reduces operation maintenance working strength, finds the potential risk of battery, with reality and positive effect.
The embodiments of the invention provide a kind of multi-Dimensional parameters straight-flow system accumulator cell management method, including：
After the current state of confirmation battery is to fill state or discharge condition, pass through high-speed, high precision AD Acquisition CircuitThe transient current and terminal voltage of battery are got, computing is integrated to transient current by preset formula, battery is obtainedCurrent state-of-charge, and battery corresponding with the actual state-of-charge of battery is got according to the actual state-of-charge of battery oughtPreceding residual capacity；
Preset battery management characteristic curve is got, preset battery management characteristic curve is inserted by interpolation methodValue Operations, obtain target battery management characteristic curve；
Terminal voltage is predicted by the method for moving average, voltage change trend is obtained, and to the current charged shape of batteryState, battery current remaining capacity, voltage change trend are fitted the amplitude for obtaining battery management curve；
The duration and accumulator parameter of the previous state of battery are got, to continuing for the previous state of batteryDuration and accumulator parameter calculate the duration for the current state for obtaining battery management curve, and with battery managementThe amplitude of curve is Y-axis, using the duration of the current state of battery management curve as X-axis, obtains battery current stateBattery management curve；
Partial target battery management corresponding with current state is got in target battery management characteristic curve specialLinearity curve, it is inclined between the battery management curve and partial target battery management characteristic curve of calculating accumulator current stateDifference, and output bias.
Preferably, a kind of multi-Dimensional parameters straight-flow system accumulator cell management method provided in an embodiment of the present invention also includes：
Whether judgment bias is more than deviation threshold, if being more than, and confirms that accumulator property has exception and carries out alarm operation,If being less than, terminate.
Preferably, a kind of multi-Dimensional parameters straight-flow system accumulator cell management method provided in an embodiment of the present invention also includes：
After confirming the current state of battery for floating charge state, electric power storage is got by high-speed, high precision AD Acquisition CircuitThe floating current in pond, and floating current is predicted by the method for moving average obtains floating current variation tendency.
Preferably, it is described after confirming the current state of battery for floating charge state, pass through High-Speed High-Accuracy AD and gather electricityRoad gets the floating current of battery, and by the method for moving average floating current is predicted and to obtain floating current change and becomeAlso include after gesture：
Judge whether floating current variation tendency is more than preset growth threshold value, if being more than, confirm that accumulator property is present differentOften and carry out alarm operation, if being less than, terminate.
Preferably, the preset formula is：
Wherein, SOC is the current state-of-charge of battery, SOC0For the initial state-of-charge of battery, CnFor battery n hoursDischarge rate capacity, η is accumulator charging/discharging process coulombic efficiency, and I is transient current.
Preferably, the embodiment of the present invention additionally provides a kind of multi-Dimensional parameters straight-flow system accumulator management device, including：
Arithmetic element, for after filling state or discharge condition, passing through height at a high speed confirming the current state of batteryPrecision AD Acquisition Circuit gets the transient current and terminal voltage of battery, and fortune is integrated to transient current by preset formulaCalculate, obtain the current state-of-charge of battery, and get and the actual state-of-charge of battery according to the actual state-of-charge of batteryCorresponding battery current remaining capacity；
Interpolating unit, for getting preset battery management characteristic curve, by interpolation method to preset battery managementCharacteristic curve carries out interpolation operation, obtains target battery management characteristic curve；
Predicting unit, for being predicted by the method for moving average to terminal voltage, obtains voltage change trend, and to electric power storageThe current state-of-charge in pond, battery current remaining capacity, voltage change trend are fitted the width for obtaining battery management curveValue；
First computing unit, for the duration and accumulator parameter of the previous state that gets battery, to electric power storageDuration and the accumulator parameter progress of the previous state in pond calculate continuing for the current state for obtaining battery management curveDuration, and using the amplitude of battery management curve as Y-axis, using the duration of the current state of battery management curve as X-axis,Obtain the battery management curve of battery current state；
Second computing unit, for getting part corresponding with current state in target battery management characteristic curveTarget battery management characteristic curve, battery management curve and the partial target battery management of calculating accumulator current stateDeviation between characteristic curve, and output bias.
Preferably, a kind of multi-Dimensional parameters straight-flow system accumulator management device provided in an embodiment of the present invention also includes：
Whether the first judging unit, be more than deviation threshold for judgment bias, if being more than, and confirms that accumulator property is present differentOften and carry out alarm operation, if being less than, terminate.
Preferably, a kind of multi-Dimensional parameters straight-flow system accumulator management device provided in an embodiment of the present invention also includes：
Acquiring unit, for after confirming the current state of battery for floating charge state, being gathered by High-Speed High-Accuracy ADCircuit gets the floating current of battery, and by the method for moving average floating current is predicted and to obtain floating current changeTrend.
Preferably, a kind of multi-Dimensional parameters straight-flow system accumulator management device provided in an embodiment of the present invention also includes：
Second judging unit, for judging whether floating current variation tendency is more than preset growth threshold value, if being more than, confirmsBe present exception and carry out alarm operation in accumulator property, if being less than, terminate.
Preferably, the preset formula is：
Wherein, SOC is the current state-of-charge of battery, SOC0For the initial state-of-charge of battery, CnFor battery n hoursDischarge rate capacity, η is accumulator charging/discharging process coulombic efficiency, and I is transient current.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：
The embodiments of the invention provide a kind of multi-Dimensional parameters straight-flow system accumulator cell management method and device, wherein, this is moreDimension parameter straight-flow system accumulator cell management method includes：It is to fill state or discharge condition in the current state of confirmation batteryAfterwards, the transient current and terminal voltage of battery are got by high-speed, high precision AD Acquisition Circuit, by preset formula to instantaneousElectric current is integrated computing, obtains the current state-of-charge of battery, and get and electric power storage according to the actual state-of-charge of batteryThe corresponding battery current remaining capacity of the actual state-of-charge in pond；Preset battery management characteristic curve is got, passes through interpolationMethod carries out interpolation operation to preset battery management characteristic curve, obtains target battery management characteristic curve；By mobile flatEqual method is predicted to terminal voltage, obtains voltage change trend, and the current state-of-charge of battery, battery current residual are heldAmount, voltage change trend are fitted the amplitude for obtaining battery management curve；The previous state for getting battery continuesDuration and accumulator parameter, duration and accumulator parameter to the previous state of battery calculate obtaining battery pipeThe duration of the current state of curve is managed, and using the amplitude of battery management curve as Y-axis, with working as battery management curveThe duration of preceding state is X-axis, obtains the battery management curve of battery current state；In target battery management characteristicPartial target battery management characteristic curve corresponding with current state, the storage of calculating accumulator current state are got in curveDeviation between battery management curve and partial target battery management characteristic curve, and output bias.Root of the embodiment of the present inventionFactually different parameters are integrated and form judgement by border running status fitting battery management indicatrix using fuzzy mathematicsAnd analysis, and then form the tracking of Life cycle condition curve and assess.Life cycle curve will be unknown in actual motionBattery condition, is digitized statistics and information-based analysis, with effect of visualization, can intuitively reflect that current battery existsFailure and problem and development trend situation in Life cycle, especially for the discovery early of battery potential risk,And deploy to ensure effective monitoring and control of illegal activities and prevent with important function and significance in advance.
Embodiment
The embodiments of the invention provide a kind of multi-Dimensional parameters straight-flow system accumulator cell management method and device, for batteryGroup is from different dimensions, and description and embodiment according to multi-parameter to battery condition progress fully and completely can improve system fortuneRow reliability, reduces operation maintenance working strength, finds the potential risk of battery, with reality and positive effect.
To enable goal of the invention, feature, the advantage of the present invention more obvious and understandable, below in conjunction with the present inventionAccompanying drawing in embodiment, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that disclosed belowEmbodiment be only a part of embodiment of the invention, and not all embodiment.Based on the embodiment in the present invention, this areaAll other embodiment that those of ordinary skill is obtained under the premise of creative work is not made, belongs to protection of the present inventionScope.
Referring to Fig. 1, one of a kind of multi-Dimensional parameters straight-flow system accumulator cell management method provided in an embodiment of the present inventionEmbodiment, including：
101st, after the current state of confirmation battery is to fill state or discharge condition, gathered by High-Speed High-Accuracy ADCircuit gets the transient current and terminal voltage of battery, is integrated computing to transient current by preset formula, is storedThe current state-of-charge of battery, and electric power storage corresponding with the actual state-of-charge of battery is got according to the actual state-of-charge of batteryPond current remaining capacity；
102nd, preset battery management characteristic curve is got, preset battery management characteristic curve is entered by interpolation methodRow interpolation is operated, and obtains target battery management characteristic curve；
103rd, terminal voltage is predicted by the method for moving average, obtains voltage change trend, and to the current lotus of batteryElectricity condition, battery current remaining capacity, voltage change trend are fitted the amplitude for obtaining battery management curve；
104th, the duration and accumulator parameter of the previous state of battery are got, to the previous state of batteryDuration and accumulator parameter calculate the duration for the current state for obtaining battery management curve, and with batteryThe amplitude for managing curve is Y-axis, using the duration of the current state of battery management curve as X-axis, obtains battery currentThe battery management curve of state；
105th, partial target battery pipe corresponding with current state is got in target battery management characteristic curveCharacteristic curve is managed, between the battery management curve and partial target battery management characteristic curve of calculating accumulator current stateDeviation, and output bias.
Current present situation is to rely primarily on accumulator voltage monitoring, and battery is judged by single-unit battery tension uniformityThe quality of performance, is limited to the production technology level and monomer voltage acquisition precision of battery, and wrong report often occurs and fails to report.Accumulator internal resistance method popularity rate is low, and cost is high, needs historical data to accumulate, and only realizes longitudinal direction contrast, it is impossible to direct across comparison.StoreBattery check volumetric method takes time and effort, and cost is high, and monitoring interval time is long, poor in timeliness.
At this stage, the diagnostic method of battery condition is single and effect is not good, it is impossible to comprehensive and accurate reflection batteryActual performance and state, be generally estimated and judge according only to single parameters such as voltage or internal resistances, be generally it is static judge, andNonkinetic analysis, the situation misjudged and failed to judge is more, and occurs failing after mistakes and omissions completely performing battery management program and curve,Incipient fault hidden danger fails timely discovery, causes battery to run in spite of illness, influences system run all right.
The present invention is mainly by the multi-Dimensional parameters performance long-term to battery condition progress and status tracking, by its realityThe battery condition curve of operation and battery management characteristic curve fitting, so as to carry out comprehensive descision in multidimensional to batteryAnd trend analysis, it is ensured that the real result of analyzing and diagnosing is reliable, and can find the problem of it is potentially present of, it is to avoid hidden danger is furtherExpand, reduce failure and accident odds.
Referring to Fig. 2, a kind of multi-Dimensional parameters straight-flow system accumulator cell management method provided in an embodiment of the present invention is anotherIndividual embodiment, including：
201st, after the current state of confirmation battery is to fill state or discharge condition, gathered by High-Speed High-Accuracy ADCircuit gets the transient current and terminal voltage of battery, is integrated computing to transient current by preset formula, is storedThe current state-of-charge of battery, and electric power storage corresponding with the actual state-of-charge of battery is got according to the actual state-of-charge of batteryPond current remaining capacity；
202nd, preset battery management characteristic curve is got, preset battery management characteristic curve is entered by interpolation methodRow interpolation is operated, and obtains target battery management characteristic curve；
203rd, terminal voltage is predicted by the method for moving average, obtains voltage change trend, and to the current lotus of batteryElectricity condition, battery current remaining capacity, voltage change trend are fitted the amplitude for obtaining battery management curve；
204th, the duration and accumulator parameter of the previous state of battery are got, to the previous state of batteryDuration and accumulator parameter calculate the duration for the current state for obtaining battery management curve, and with batteryThe amplitude for managing curve is Y-axis, using the duration of the current state of battery management curve as X-axis, obtains battery currentThe battery management curve of state；
205th, partial target battery pipe corresponding with current state is got in target battery management characteristic curveCharacteristic curve is managed, between the battery management curve and partial target battery management characteristic curve of calculating accumulator current stateDeviation, and output bias.
206th, whether judgment bias is more than deviation threshold, if being more than, and confirms that accumulator property has exception and alarmedOperation, if being less than, terminates.
It should be noted that can judge before step 201 is performed the current state of battery, if confirming electric power storageThe current state in pond is floating charge state, then performs following steps：
After confirming the current state of battery for floating charge state, electric power storage is got by high-speed, high precision AD Acquisition CircuitThe floating current in pond, and floating current is predicted by the method for moving average obtains floating current variation tendency；
Judge whether floating current variation tendency is more than preset growth threshold value, if being more than, confirm that accumulator property is present differentOften and carry out alarm operation, if being less than, terminate.
Further, preset formula is：
Wherein, SOC is the current state-of-charge of battery, SOC0For the initial state-of-charge of battery, CnFor battery n hoursDischarge rate capacity, η is accumulator charging/discharging process coulombic efficiency, and I is transient current.
Above is the detailed description carried out to a kind of multi-Dimensional parameters straight-flow system accumulator cell management method, for ease of understanding,A kind of application of multi-Dimensional parameters straight-flow system accumulator cell management method will be illustrated with a concrete application scene, applied belowExample includes：
Straight-flow system generally uses valve controlled sealed lead-acid accumulator, and its battery management characteristic curve is as shown in Figure 4.
Fill and just fill, battery is in original state, it is necessary to long period equalizaing charge, usual t1 ≈ 15h.
Floating charge is daily, maintains battery self-discharge current, is 3 months, usual t2, t4, t7 ≈ 2160h according to code.
Timing is filled, battery is in fully charged state, it is necessary to less time equalizaing charge, usual t3 ≈ 3h.
Discharge accident ＆ cores hold, and unplanned property or plan electric discharge occurs in battery, and usual t5 arrives 15h for several minutes.
Supplement is filled, the energy of supplement battery discharging loss, the equalizaing charge time is indefinite, and usual t6 is related to t5Connection.
With reference to the characteristics of above-mentioned each stage, main following five kinds of methods carry out various dimensions state estimation and analysis：
1st, current integration method：SOC is storage battery charge state, directly embody accumulator capacity number.Using high at a high speedPrecision A/D gathers the transient current of accumulator charging/discharging process in real time, and is integrated computing by calculation formula, obtains electric power storageThe actual SOC states in pond, so as to judge and estimate battery current remaining capacity.
Formula：
Wherein：The final state-of-charge of SOC- batteries；SOC0The initial state-of-charge of-battery；Cn- batteries are put for n hoursElectric rate capacity；η-accumulator charging/discharging process coulombic efficiency；Transient current in I- accumulator charging/discharging process.
2nd, floating current method：If is floating current, for compensating battery self discharge and maintaining oxygen cycle to be combined.Using specialWith floating current sensor (high accuracy, shock resistance), it will be put by programmable gain amplifier (PGA) before Weak current signalGreatly, and using High-Speed High-Accuracy AD gather in real time, it is about 1mA/Ah left to obtain under mA grades of battery floating currents, regular situationIt is right.Floating current is bigger, then also means to the corrosion current of grid and also bigger for the electric current that water is lost.
Formula：If=Is+Ir
Wherein：If is battery floating current, and Is is corrosion current, and Ir is that If is got over more than threshold values for water loss currentLoss that is big then illustrating inside is bigger, represents state bad.
3rd, voltage tendency method：Vn is accumulator voltage, in battery carries out charge and discharge process, with its dischargeable capacityChange, accumulator voltage is also followed to be changed in the lump, with strong correlation.Single-unit battery is sampled using difference prepositionAmplification, it is to avoid influence of the high common-mode voltage to Acquisition Circuit, is gathered in real time using High-Speed High-Accuracy AD, and it is mV grades of storages to obtain precisionBattery terminal voltage.Single-unit accumulator voltage variation tendency can be analyzed by interpolation method according to accumulator cell charging and discharging indicatrixAssess current capacities variation tendency.
Interpolation method refers to carry out interpolation analysis for the data in the capacity of battery and the table of voltage relationship, and by table 1Interior 50%, some click-through row interpolations such as 70%, 100%, draws the corresponding relation of approximate measurement voltage and capacity, equivalent to handleOriginally the form of n point, after multiple interpolation, becomes 2n, 4n, or even more points, by the corresponding line chart of discrete measurementTable, is changed into smooth curve, it is ensured that voltage and matching for capacity are more accurate, for example (data may not be accurately)：It is i.e. originalThere are 2.00V 50%, 2.06V of correspondence correspondences 53%, if not interpolation, corresponding relation can not be determined when voltage is 2.03, be passed throughCross after interpolation, then can estimate as 51.5%.Interpolation is smoother for aim curve, and the method for moving average is the reality that will have been surveyedBorder curve carries out " extension ", and performance is the future trend of virtual condition, unrelated with aim curve.
By taking electric discharge as an example, 2V valve controlled sealed lead-acid accumulators discharge capacity and accumulator voltage relation are as shown in table 1：
Table 1
| Discharge capacity | 50% | 70% | 100% |
| Accumulator voltage | 2.00V | 1.95V | 1.80V |
4th, conservation of energy：Accumulator charging/discharging process is electrochemical reaction process, according to conservation of energy principle, a partEmbodied in the form of electrical energy/chemical energy conversion, another part is embodied in the form of heat energy, the internal resistance for often saving battery is different with performance,Its temperature change will be caused different.Tn is battery temp, is defined by battery terminal negative column temperature.In every section storage battery negative poleTemperature sensors of high precision is installed, gathered in real time using high-precision AD, the temperature information for often saving battery is obtained.Battery tempVariance embody the uniformity trend of each battery in batteries.
Formula：E0=EI+ET
Wherein：E0- battery gross energies；EI- battery electric energies/chemical energy；ET- battery thermals energy (temperature)；
Formula：
Wherein：σ-battery temp variance；Ti- single-unit battery temp；μ-battery temp average；N- whole batteriesQuantity.
5th, duration estimation algorithm：The duration in each stage can all be calculated according to accumulator parameter and obtained in battery management curve, can according to previous state estimate and infer NextState used in duration.Such as：When accumulator property declines, cause its capacityDecline, during timing is filled or supplement and fill, its duration t6 then can have found this problem significantly lower than computational theory value, andTrack the change of its duration, you can the trend of accumulator property deterioration is found, so as to find its incipient fault hidden danger.
Battery operation mainly has three kinds of states in battery management curve：Floating charge, equal charge and discharge.The present invention is according to upperState five kinds of methods and multi-Dimensional parameters management is carried out to battery.
When battery is in floating charge state, using floating current method, its floating current is monitored in real time, and use rolling averagePredicted method carries out trend analysis, is then exception when the expection of its growth trend will exceed prescribed threshold, represents its both inner padCorrosion progress is very fast, there is potential deterioration hidden danger, and the risk of especially internal storage battery open circuit is higher.It should be noted that storingThe floating current of battery has approximate proportionate relationship with its capacity, when the timing of capacity one of battery, its floating current Ying YiIn individual approximate scope, early warning threshold values can be set, actually detected floating current is fitted and matched with theoretical value, suitablyDeviation for allow, but if then representing there is hidden danger more than early warning threshold values.
Battery, using current integration method and voltage tendency method, is estimated in when filling state and discharge condition by SOCWith the amplitude of voltage change trend fitting battery management curve, i.e. curve Y-axis situation.Conservation of energy mainly plays auxiliary correctiveEffect：Thermal loss is calculated, to correct the energy deviation that SOC estimations are present；Temperature variance is calculated, with parameters pair such as correction voltagesIn the assessment of uniformity of storage batteries.Using duration estimation algorithm, current state electric power storage is calculated according to the SOC estimated values of previous statePond manages the duration of curve, as curve X-axis situation.Set when X-axis and Y-axis the fitting variance of battery management curve exceedWhen determining threshold values, then it represents that accumulator property and its nominal performance have deviation, there is potential deterioration hidden danger.Record battery actualOperation curve, and show actual curve and manage the deviation of curve, to remind operation maintenance personnel to cause concern, and as abnormalThe reference frame of battery management curve is continued executing with after processing.
When battery has potential risk, filling in state and discharge condition, the situation for being easiest to occur is not go outNow alarm, but X-axis and Y-axis fail to reach expected duration or amplitude by battery management curve.Because straight-flow system is not alarmed, also notProduce alarm logging, and unattended website nobody at the scene, cause many potential risks and ignore.Display and prompting are actual bentLine and the deviation for managing curve, contribute to operation maintenance personnel to find and pay close attention to such incipient fault hidden danger.
When battery has property abnormality, filling in state and discharge condition, the situation for being easiest to occur is that occurAlarm, battery management curve is forced to interrupt or forces to continue executing with.If forced interruption, normal battery is caused to failNormal battery management curve is completed, the situation of charge less occurs.If enforcing, abnormal battery is caused to be transported in spite of illnessOK, the situation for occurring overcharging or putting excessively.Correct way is the existing battery management curve of forced interruption, is handled abnormal and extensiveAfter answering normally, former battery management curve is continued executing with, until terminating.Abnormal because occurring, now straight-flow system produces alarm, butUnattended website nobody at the scene, it is impossible to manual intervention is simultaneously handled, abnormal undiscovered and processing, causes what battery was deterioratedProblem is more serious.Display and the deviation for reminding actual curve and management curve, contribute to operation maintenance personnel to find and handleIt is abnormal, also provide important reference frame for the battery management curve that continues executing with after recovering normally.
Five kinds of methods of the above are all the processes that actual curve is fitted with aim curve.For Y-axis, mainly amplitude is to adoptWith the mode of timing, direct calculating difference, the variance then done in special time (fixed or settable) is calculated, and is drawn in spyIn fixing time, the degree that actual curve is fitted with aim curve, as basis for estimation, so can avoid unexpected rank from more changingThe error brought and erroneous judgement.For X-axis, mainly the time, it is the difference according to estimated time and real time, directly judges,The then no problem in tolerance, deviation is bigger, and declarative procedure time change is larger, more need to be paid close attention to and be handled.
Battery multi-Dimensional parameters management method, battery running status is analyzed and diagnoses with reference to above-mentioned five kinds of methods, andBattery management indicatrix is fitted according to actual motion state, different parameters are integrated using fuzzy mathematics and is formed and sentencedDisconnected and analysis, and then form the tracking of Life cycle condition curve and assess.Life cycle curve will be unknown in actual motionBattery condition, be digitized statistics and information-based analysis, with effect of visualization, can intuitively reflect current batteryFailure and problem and development trend situation in Life cycle, especially for the hair early of battery potential riskIt is existing, and deploy to ensure effective monitoring and control of illegal activities and prevent with important function and significance in advance.
The above method, from different dimensions, is carried out fully and completely for batteries according to multi-parameter to battery conditionDescription and embodiment, can improve system operation reliability, reduce operation maintenance working strength, find the potential risk of battery,With reality and positive effect.
Referring to Fig. 3, one of a kind of multi-Dimensional parameters straight-flow system accumulator management device provided in an embodiment of the present inventionEmbodiment, including：
301st, arithmetic element, for after filling state or discharge condition, passing through height confirming the current state of batteryFast high-precision AD Acquisition Circuit gets the transient current and terminal voltage of battery, and transient current is accumulated by preset formulaPartite transport is calculated, and obtains the current state-of-charge of battery, and is got according to the actual state-of-charge of battery actually charged with batteryThe corresponding battery current remaining capacity of state；
302nd, interpolating unit, for getting preset battery management characteristic curve, by interpolation method to preset batteryManagement characteristic curve carries out interpolation operation, obtains target battery management characteristic curve；
303rd, predicting unit, for being predicted by the method for moving average to terminal voltage, obtains voltage change trend, and rightThe current state-of-charge of battery, battery current remaining capacity, voltage change trend, which are fitted, obtains battery management curveAmplitude；
304th, the first computing unit, it is right for the duration and accumulator parameter of the previous state that gets batteryDuration and the accumulator parameter progress of the previous state of battery calculate the current state for obtaining battery management curveDuration, and using the amplitude of battery management curve as Y-axis, using the duration of the current state of battery management curve asX-axis, obtains the battery management curve of battery current state；
305th, the second computing unit, it is corresponding with current state for being got in target battery management characteristic curvePartial target battery management characteristic curve, battery management curve and the partial target battery of calculating accumulator current stateDeviation between management characteristic curve, and output bias.
Further, a kind of multi-Dimensional parameters straight-flow system accumulator management device provided in an embodiment of the present invention also includes：
Whether the 306th, the first judging unit, be more than deviation threshold for judgment bias, if being more than, and confirms that accumulator property is depositedIn exception and alarm operation is carried out, if being less than, terminated.
Further, a kind of multi-Dimensional parameters straight-flow system accumulator management device provided in an embodiment of the present invention also includes：
307th, acquiring unit, for after confirming the current state of battery for floating charge state, passing through High-Speed High-Accuracy ADAcquisition Circuit gets the floating current of battery, and floating current is predicted by the method for moving average obtains floating currentVariation tendency.
Further, a kind of multi-Dimensional parameters straight-flow system accumulator management device provided in an embodiment of the present invention also includes：
308th, the second judging unit, for judging whether floating current variation tendency is more than preset growth threshold value, if being more than,Confirm that accumulator property has exception and carries out alarm operation, if being less than, terminate.
Further, preset formula is：
Wherein, SOC is the current state-of-charge of battery, SOC0For the initial state-of-charge of battery, CnFor battery n hoursDischarge rate capacity, η is accumulator charging/discharging process coulombic efficiency, and I is transient current.
The embodiment of the present invention to battery by carrying out multi-Dimensional parameters monitoring and status tracking, from multi-angle to batteryThe change of energy is analyzed, and in the past isolated parameter is together in series, and forms Life cycle curve, and carried out on time dimensionShow, the incipient fault hidden danger that internal storage battery is present can be found in the angle of macroscopic view, and propose treatment advice, it is to avoidBecause of performance misjudgement and erroneous judgement that single monitoring method is brought, there is positive effect for the safe and stable operation of battery.Meanwhile, rootAccording to Life cycle curve, running status trending analysis is carried out, is reduced because monitoring device error (is mainly adjusted different including battery parameterOften, voltage x current acquisition abnormity, charger output abnormality) caused by careless omission situation caused by mistakes and omissions situation and human error, fromAnd prevent batteries catastrophic discontinuityfailure occur, the potential faults of dc bus decompression are reduced, the peace of straight-flow system operation is improvedFull reliability.
It is apparent to those skilled in the art that, for convenience and simplicity of description, the system of foregoing description,The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, will not be repeated here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be withRealize by another way.For example, device embodiment described above is only schematical, for example, the unitDivide, only a kind of division of logic function there can be other dividing mode when actually realizing, such as multiple units or componentAnother system can be combined or be desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown orThe coupling each other discussed or direct-coupling or communication connection can be the indirect couplings of device or unit by some interfacesClose or communicate to connect, can be electrical, machinery or other forms.
The unit illustrated as separating component can be or may not be it is physically separate, it is aobvious as unitThe part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multipleOn NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs's.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, can alsoThat unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated listMember can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated unit is realized using in the form of SFU software functional unit and as independent production marketing or usedWhen, it can be stored in a computer read/write memory medium.Understood based on such, technical scheme is substantiallyThe part contributed in other words to prior art or all or part of the technical scheme can be in the form of software productsEmbody, the computer software product is stored in a storage medium, including some instructions are to cause a computerEquipment (can be personal computer, server, or network equipment etc.) performs the complete of each embodiment methods described of the inventionPortion or part steps.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-OnlyMemory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journeyThe medium of sequence code.
Described above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to beforeEmbodiment is stated the present invention is described in detail, it will be understood by those within the art that：It still can be to precedingState the technical scheme described in each embodiment to modify, or equivalent substitution is carried out to which part technical characteristic；And theseModification is replaced, and the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.