CN105093006B - A kind of electrical equipment monitoring method remembered based on electrical quantity band - Google Patents
A kind of electrical equipment monitoring method remembered based on electrical quantity band Download PDFInfo
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- CN105093006B CN105093006B CN201510305390.8A CN201510305390A CN105093006B CN 105093006 B CN105093006 B CN 105093006B CN 201510305390 A CN201510305390 A CN 201510305390A CN 105093006 B CN105093006 B CN 105093006B
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Abstract
The present invention proposes a kind of electrical equipment monitoring method remembered based on electrical quantity band, electrical quantity, and comprehensive a variety of electric quantity informations are primarily based on, a kind of electrically cumulative model with memory characteristic is built, the model built is then based on, and draws according to special algorithm the health index of electrical equipment.Based on this method, the real-time monitoring to electrical equipment can be realized quickly, efficient and user friendly on the hardware foundation for not changing current same category of device, while compatible traditional overload alert detecting mechanism.
Description
Technical field
The present invention relates to a kind of electrical equipment health status monitoring method, and in particular to a kind of based on electrical quantity, band note
Recall characteristic, the quick and less monitoring method for electrical equipment health status of amount of calculation.
Background technology
With the fast development of power system, electrical equipment quantity is more and more, and function is become increasingly complex, and it is monitored
Become more and more difficult.Traditional method is that, by overload alarming mechanism, this kind of method has the disadvantage that：1）, overload
Alarm is either-or BOOL amounts, can only passively wait its state transition, and can not the current electrical equipment of Real Time Observation it is strong
Health state.2）, overload alarm current fixed value adjusting need to avoid electrical equipment starting current, therefore can not be in full electricity scope
Inside it is monitored.3）, overload time of fire alarming fixed value adjusting need to avoid distal embolic protection actuation time, the value is generally large, leads
Cause can not be monitored in full time domain scale.4）, overload alarm only present current value is judged, and ignore data memory, hardly possible
Truly to reflect actual conditions.
Meanwhile, there is substantial amounts of secondary device to be used for the function for monitoring of electrical equipment, such as Microcomputer Protection, RTU, electricity at present
Energy table, negative control terminal etc., these equipment are all gathered to electric quantity information.
Therefore, it can not only intuitively show and currently electrically set in the urgent need to a kind of real-time monitoring value based on electrical quantity at present
Standby health status, and various warning messages can be synchronously generated with compatible traditional design.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of electrical equipment monitoring side remembered based on electrical quantity band
Method, on the hardware foundation for not changing current same category of device, quickly and efficiently realizes the real-time friendly monitoring to electrical equipment,
It possesses that speed is fast and the less feature of amount of calculation.
Technical scheme is as follows：
A kind of electrical equipment monitoring method remembered based on electrical quantity band, it is characterized in that following the steps below：
1）, based on electrical quantity, and comprehensive a variety of electric quantity informations build a kind of electrically cumulative model with memory characteristic such as
Under：
(5)
(6)
（7）
Wherein,For current cumulant, andFor maximum allowable cumulant,Accumulated for release initial time
Amount,To be monitored the accumulation characteristics of electrical equipment,For electric current,For voltage,For zero-sequence current；Have for system
Work(power,For electric current weighting coefficient,For voltage weight coefficient,For zero-sequence current weight coefficient,For power weightings
Coefficient,For current electrical equipment health value,For initial electric equipment health value,Electrical equipment is good for during for last iteration
Health value；
2）, based on above-mentioned model, the health index of electrical equipment is drawn according to following algorithm：
（9）
（11）
Wherein,WithElectrical equipment health value during for last iteration,For current electrical equipment health value,
AndFor desired alarming value,For the iterative calculation cycle.
If current accumulated value is less than threshold with the difference between alarming value at the end of last time integration period, start formula（11）
Algorithm；If accumulated value is more than or equal to alarming value, alarm immediately, with compatible current overload type of alarm.
The positive effect of the present invention is：Based on method of the invention, it is possible to not changing the hardware of current same category of device
On the basis of, the real-time monitoring for electrical equipment is realized quickly, efficiently and with open arms, while compatible traditional overload alarm prison
Survey mechanism.
At present, method of the invention is successfully tried out under confidential state in Microcomputer Protection, negative control terminal, high-end electric energy meter
Etc. in plurality of devices, running situation is stable.
Brief description of the drawings
Fig. 1 is the cumulative theoretical model of electricity of the present invention；
Fig. 2 is electricity release theory model of the present invention；
Fig. 3 is true electricity Accumulation Model of the invention；
Fig. 4 is amendment fitted flow journey figure of the fast algorithm of the present invention to algorithm at a slow speed；
Fig. 5 is amendment model of fit figure of the fast algorithm to algorithm at a slow speed in cumulative process of the present invention；
Fig. 6 is the quick cumulative amendment model of fit figure to algorithm at a slow speed during present invention release.
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples
1. build band memory electricity Accumulation Model
Simple Accumulation Model such as formula（1）With shown in Fig. 1：
(1)
WhereinFor current cumulant, andFor maximum allowable cumulant,To be monitored the tired of electrical equipment
Product characteristic, generally physics measured value.
Simple releasing theory such as formula（2）With shown in Fig. 2：
(2)
WhereinFor current cumulant, andTo discharge initial time cumulant,To be monitored electrical equipment
Release characteristics, generally physics measured value.
Therefore, our the completely cumulative releasing theories of reasonable assumption electrical equipment are formula（3）, its schematic diagram is shown in Fig. 3：
（3）
According to electrical equipment characteristic, typically have, obtain formula（4）
（4）
The electrical quantity that can be added up includes electric current, voltage, power etc., and the cumulative characteristics of comprehensive various electrical quantity can be built
Following accumulation amount, is shown in formula（5）
(5)
Wherein,For zero-sequence current；For system active power；~, can foundation for each several part weight coefficient
Electrical equipment characteristic is adjusted, and is generally had。
Similarly, maximum allowable accumulated value is shown in formula（6）：
(6)
By formula（5）And formula（6）Bring formula into（4）, final electricity Accumulation Model is obtained, the model not only possesses memory work(
Can, and meet basic cumulative release model, and considered the accumulation characteristics of various electrical quantity.
2. accumulation algorithm at a slow speed
SimpleAccumulation amount is difficult to intuitively understand current electrical equipment characteristic, intuitively understands for the ease of user current
State, by formula（4）Formula is obtained after percentage（7）, it is as follows：
（7）
WhereinFor current electrical equipment health status；Tolerate nargin for maximum electrical equipment, the value is generally higher than
100%, be in electric utility general range（200%~800%）；Electrical device status during for initial state, is 0% when equipment is restarted,
Ignore the information between 0 moment, therefore our system is basic causal system.
By formula（7）Discretization, can obtain formula（8）
（8）
If according to formula（8）Calculate in a usual manner, in order to improve computational accuracy, be necessarily required to reduce, but nowIt is intended to 1, ultimately results in.In order to evade the problem, we set=0.98, then foundationWhen
Between be spaced and added up, it is as follows：
（9）
Based on formula (9), it can be added up for a long time, and amount of calculation very little.ButWhen being worth larger,Value
Than larger, the delta data in the time range is ignored, and can influence the computational accuracy in short time range.
Factor（9）Say that the expression formula represented can be performed with slow speed, the algorithm is referred to as accumulation algorithm at a slow speed.
3. compatible traditional alert quantity of state
Most common at present to be alarmed based on the method that electrical quantity is monitored for overload, the information is BOOL amounts.According to formula（9）
Calculate for analog quantity, simple same alarming value（Such as 80% alarm）Compare, factor（9）Accumulation interval is slower, therefore its
Time response is not good, namely to send time of fire alarming characteristic not good.
Assuming that current accumulated value is less than threshold with the difference between alarming value at the end of last integration period, then need to open
Dynamic quickly accumulation is calculated, to improve time response.
According to formula（7）Formula can be obtained（10）, it is as follows：
(10)
Wherein,Accumulation amount after terminating for last integration period, andFor desired alarming value, both
Between difference meet threshold.
By formula（10）Formula after discretization（11）
（11）
According to formula（11）, can set lessValue, is then added up, when accumulated value is more thanWhen, then meet bar
Part, sends alarm signal.
Calculate, can be built such as formula for the ease of embedded system（12）Shown look-up table, to reduce amount of calculation：
（12）
According to formula（11）As long as, provide different thresholds and, we can draw multigroup alarming value, can be with a variety of journeys
Degree is alarmed, and is easy to user to observe.
Formula（11）Say that the accumulation algorithm represented performs speed soon, but cumulative in short time range, the algorithm can only be carried out
Referred to as quick accumulation algorithm.
4. amendment of the fast algorithm to algorithm at a slow speed is fitted
Such as above, according to formula（9）When add up at a slow speed, time interval is larger, and variations in detail is ignored；And with formula（11）
When quickly add up, computational accuracy highest, but the accumulation moment is shorter.
In order to make the advantage and disadvantage of two kinds of algorithms up, it is necessary to which two kinds of algorithms are modified into fitting, using slow on a wide range of
Fast accumulation algorithm, uses quick accumulation algorithm amendment in the scope that adds up at a slow speed, refers to flow chart 3.
Adding up at a slow speed needs to set threshold, and the threshold is desired cumulative precision, such as when expecting 1% precision, can set
Threshold is 0.5 ~ 0.8 or so.Alarm threshold can be less than although should be noted the threshold of correction algorithm, algorithm is consistent.
5. it is easy to test
Because current accumulation amount considers data memory, therefore it is difficult that electricity characteristic and time response are tested.In order to
It is easy to test, it is necessary to provide cumulant zero interface, and electric flow characteristic keeps segmentation constant in test process.
Claims (2)
1. a kind of electrical equipment monitoring method remembered based on electrical quantity band, it is characterized in that following the steps below：
1）, based on electrical quantity, and comprehensive a variety of electric quantity informations build a kind of electrically cumulative model with memory characteristic as follows：
(5)
(6)
（7）
Wherein,For current cumulant, andFor maximum allowable cumulant,To discharge initial time cumulant,To be monitored the accumulation characteristics of electrical equipment,For electric current,For voltage,For zero-sequence current；It is active for system
Power,For electric current weighting coefficient,For voltage weight coefficient,For zero-sequence current weight coefficient,For power weightings system
Number,For current electrical equipment health value,For initial electric equipment health value,Electrical equipment health during for last iteration
Value；
2）, based on above-mentioned model, the health index of electrical equipment is drawn according to following algorithm：
（9）
（11）
Wherein,WithElectrical equipment health value during for last iteration,For current electrical equipment health value, andFor desired alarming value,For the iterative calculation cycle.
2. the electrical equipment monitoring method remembered based on electrical quantity band according to claims 1, it is characterized in that：If on
Current accumulated value is less than threshold with the difference between alarming value at the end of secondary integration period, starts formula（11）Algorithm；If tired
Product value is more than or equal to alarming value, alarms immediately, with compatible current overload type of alarm.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101542303A (en) * | 2006-11-30 | 2009-09-23 | Esi电子科技工业公司 | Self-test, monitoring, and diagnostics in grouped circuitry module |
| TW201441631A (en) * | 2012-12-28 | 2014-11-01 | Axcelis Tech Inc | Charge integration based electrostatic clamp health monitor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000023935A (en) * | 1998-07-14 | 2000-01-25 | Omron Corp | Health management guide advising device |
| US20110051479A1 (en) * | 2009-08-27 | 2011-03-03 | Dell Products L.P. | Systems and Methods for Controlling Phases of Multiphase Voltage Regulators |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101542303A (en) * | 2006-11-30 | 2009-09-23 | Esi电子科技工业公司 | Self-test, monitoring, and diagnostics in grouped circuitry module |
| TW201441631A (en) * | 2012-12-28 | 2014-11-01 | Axcelis Tech Inc | Charge integration based electrostatic clamp health monitor |
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Address after: 264003 Laishan City, Yantai province Venture Center, Shandong Applicant after: Yantai Dongfang Wisdom Electric Co., Ltd. Address before: 264003 Laishan City, Yantai province Venture Center, Shandong Applicant before: Yantai Dongfang Wisdom Electronic Co., Ltd. |
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