CN109932594A - The method and apparatus of fault detection for power equipment - Google Patents
The method and apparatus of fault detection for power equipment Download PDFInfo
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- CN109932594A CN109932594A CN201910199961.2A CN201910199961A CN109932594A CN 109932594 A CN109932594 A CN 109932594A CN 201910199961 A CN201910199961 A CN 201910199961A CN 109932594 A CN109932594 A CN 109932594A
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Abstract
The present invention relates to the method and apparatus of the fault detection for power equipment, method includes: one group on the three-phase for obtain a power equipment with respective first temperature rise in attribute contact point, and every group is corresponding three contact points of same position in power equipment with attribute contact point；A target temperature rise is determined from each first temperature rise；Target temperature rise is modified, revised second temperature rise is obtained；Determine whether same attribute contact point breaks down according to the second temperature rise.According to the present invention, by one group of the lateral comparison temperature rise with each phase in attribute contact point, to determine the contact point, which mutually breaks down, and first temperature rise to be compared is modified before comparison so that judging result is more accurate, such comparison more rapid and convenient, and accuracy is preferable.
Description
Technical field
This practical field of power system, the especially method and apparatus for the fault detection of power equipment.
Background technique
Switchgear is the important transmission & distribution electric installation in electric system, it is therefore desirable to which the operating condition of switchgear is carried out
Real time monitoring.Switchgear usually has various contact points, such as position, copper bar connection outside that Mume flower contact is contacted with static contact are set
Standby position etc., when electric current flows through contact point, contact point can generate heat, therefore the maximum that contact point is defined in national standard permits
Perhaps heating temperature and maximum allowable temperature rise.Due to factors such as manufacture, installation, transport or longtime runnings, contact point may be touched
The problems such as point oxidation, deformation loosen, when there are these problems, the temperature rise of contact point can exceed defined range, cause to switch
The damage of cabinet.In order to avoid these problems, it usually needs the temperature rise of butt contact is monitored on-line.Specifically, when discovery is real
Border temperature rise is more than maximum allowable temperature rise, it is determined that is broken down contact point.Here temperature rise refers to the temperature and ring of contact point
Difference between the temperature of border, environment temperature are generally obtained by the temperature probe being placed in environment.
Under different loads due to switchgear, generated temperature or temperature rise are not fixed, therefore, using unification
Maximum allowable heating temperature judges whether contact point breaks down with temperature rise is allowed, it is possible to the case where reporting by mistake.
Summary of the invention
In view of this, the invention proposes the methods of the fault detection for power equipment, comprising:
One group on the three-phase of a power equipment is obtained with respective first temperature rise in attribute contact point, is belonged to described in every group
Property contact point be the power equipment in corresponding three contact points of same position；
A target temperature rise is determined from each first temperature rise；
The target temperature rise is modified, revised second temperature rise is obtained；
Determine whether the same attribute contact point breaks down according to second temperature rise.
By one group of the lateral comparison temperature rise with each phase in attribute contact point, to determine the contact point, which mutually breaks down, and
First temperature rise to be compared is modified before comparison so that judging result is more accurate, such comparison is more quickly just
Victory, and accuracy is preferable.
According to method as described above, optionally, a target temperature rise is determined from each first temperature rise, comprising: from
Determine that value maximum one is used as target temperature rise in each first temperature rise.It first selects value maximum one and is used as target temperature rise, it can
Simplify calculation amount.
According to method as described above, optionally, the target temperature rise is modified, obtains revised second temperature rise
Include:
Selected in remaining two first temperature rises one it is biggish as benchmark temperature rise；
Revised second temperature rise Δ K is obtained according to the following formulaCm:
Wherein, Δ KCTo indicate the target temperature rise, ICIndicate the primary of the corresponding same attribute contact point of the target temperature rise
Electric current, IBIndicate the primary current of the corresponding same attribute contact point of the benchmark temperature rise.
Although each phase current difference in same position is little, actually also there is certain imbalance.In order to
This uneven influence to each same attribute contact point is excluded, needs to be modified target temperature rise.
According to method as described above, optionally, the primary current is the flat of the primary current in current sample period
Mean value.Since primary current may be real-time change, using the average value of primary current in a sampling period as this week
The primary current of power equipment in phase can obtain the value of accurate primary current as far as possible.
According to method as described above, optionally, the same attribute contact point is determined whether according to second temperature rise
Whether break down and includes:
Second temperature rise is compared with the benchmark temperature rise, determines in the two that lesser one is third temperature rise,
Biggish one is the 4th temperature rise；
If the 4th temperature rise is greater than the sum of the third temperature rise and first setting factor beforehand and the 4th temperature rise is big
In the product of the third temperature rise and second setting factor beforehand, it is determined that the corresponding same attribute contact point of the 4th temperature rise goes out
Existing failure.
The result determined in this way is more accurate.
According to method as described above, optionally, it is each to obtain the three-phase that the same attribute contact point pair an of power equipment is answered
From the first temperature rise include:
5th temperature rise of one contact point of one power equipment and knot when one initial sampling period of acquisition starts
The 6th temperature rise when beam, the contact point are the contact position of at least two components of the power equipment；
Obtain the time constant of the one order inertia system an of power equipment；
According to the 5th temperature rise, the 6th temperature rise and the time constant, institute at the end of predicting the X sampling period
State the first temperature rise of contact point, X=[LN], wherein L is positive integer and L >=3, s are a sampling period, described in N*s=
Time constant.
Temperature rise when being started by obtaining a sampling period at the end of carries out the temperature after preset time period pre-
It surveys, the value after capable of quickly determining the temperature rise after preset time period, such as temperature rise stabilization in this way passes through as the first temperature rise
The temperature rise of the prediction executes subsequent some operations, such as the behaviour for whether having same attribute contact point to break down in previous embodiment
Make.
It is optionally, normal according to the 5th temperature rise, the 6th temperature rise and the time according to method as described above
Number, the first temperature rise of the contact point at the end of predicting the X sampling period, comprising:
According to the following formula, the first temperature rise T of the contact point is determined:
T=(Δ Kn-ΔKn-1*e-1/N)/(1-e-1/N)
Wherein, Δ Kn-1For the 5th temperature rise, Δ KnFor the 6th temperature rise.
The present invention also provides a devices for the fault detection of power equipment, comprising:
One acquiring unit, one group on three-phase for obtaining a power equipment is the same as attribute contact point respective first
Temperature rise, described in every group with attribute contact point be the power equipment in corresponding three contact points of same position；
One the first determination unit, for determining a target temperature rise from each first temperature rise；
One amending unit obtains revised second temperature rise for being modified to the target temperature rise；
One the second determination unit, for determining whether the same attribute contact point is sent out according to second temperature rise
Raw failure.
By one group of the lateral comparison temperature rise with each phase in attribute contact point, to determine the contact point, which mutually breaks down, and
First temperature rise to be compared is modified before comparison so that judging result is more accurate, such comparison is more quickly just
Victory, and accuracy is preferable.
According to device as described above, optionally, first determination unit is specifically used for: determining from each first temperature rise
It is worth maximum one and is used as target temperature rise.It first selects value maximum one and is used as target temperature rise, calculation amount can be simplified.
According to device as described above, optionally, the amending unit is specifically used for:
Selected in remaining two first temperature rises one it is biggish as benchmark temperature rise；
Revised second temperature rise Δ K is obtained according to the following formulaCm:
Wherein, Δ KCTo indicate the target temperature rise, ICIndicate the primary of the corresponding same attribute contact point of the target temperature rise
Electric current, IBIndicate the primary current of the corresponding same attribute contact point of the benchmark temperature rise.
Although each phase current difference in same position is little, actually also there is certain imbalance.In order to
This uneven influence to each same attribute contact point is excluded, needs to be modified target temperature rise.
According to device as described above, optionally, the primary current is the flat of the primary current in current sample period
Mean value.Since primary current may be real-time change, using the average value of primary current in a sampling period as this week
The primary current of power equipment in phase can obtain the value of accurate primary current as far as possible.
According to device as described above, optionally, second determination unit is specifically used for:
Second temperature rise is compared with the benchmark temperature rise, determines in the two that lesser one is third temperature rise,
Biggish one is the 4th temperature rise；
If the 4th temperature rise is greater than the sum of the third temperature rise and first setting factor beforehand and the 4th temperature rise is big
In the product of the third temperature rise and second setting factor beforehand, it is determined that the corresponding same attribute contact point of the 4th temperature rise goes out
Existing failure.
The result determined in this way is more accurate.
According to device as described above, optionally, the acquiring unit is specifically included:
One first acquisition subelement, for obtain an initial sampling period start when one of one power equipment
5th temperature rise of contact point and at the end of the 6th temperature rise, the contact point is at least two components of the power equipment
Contact position；
One second acquisition subelement, the time constant of the one order inertia system for obtaining a power equipment；
One prediction subelement, for according to the 5th temperature rise, the 6th temperature rise and the time constant, prediction the
First temperature rise of the contact point at the end of X sampling period, X=[LN], wherein L is positive integer and L >=3, s are described in one
Sampling period, time constant described in N*s=.
Temperature rise when being started by obtaining a sampling period at the end of carries out the temperature after preset time period pre-
It surveys, the value after capable of quickly determining the temperature rise after preset time period, such as temperature rise stabilization in this way passes through as the first temperature rise
The temperature rise of the prediction executes subsequent some operations, such as the behaviour for whether having same attribute contact point to break down in previous embodiment
Make.
According to device as described above, optionally, the prediction subelement is specifically used for:
According to the following formula, the first temperature rise T of the contact point is determined:
T=(Δ Kn-ΔKn-1*e-1/N)/(1-e-1/N)
Wherein, Δ Kn-1For the 5th temperature rise, Δ KnFor the 6th temperature rise.
The present invention provides a device for the fault detection of power equipment again, comprising:
At least one processor, for storing instruction；
At least one processor, the use described in the instruction execution for being used to be stored according to the memory is any one of aforementioned
In the method for the fault detection of power equipment.
The present invention provides a readable storage medium storing program for executing again, and machine readable instructions are stored in the readable storage medium storing program for executing, described
When being executed by machine, the machine is executed according to aforementioned described in any item for power equipment machine readable instructions
The method of fault detection.
Detailed description of the invention
Below will detailed description of the present invention preferred embodiment by referring to accompanying drawing, make those skilled in the art more
Clear above and other feature and advantage of the invention, in attached drawing:
Fig. 1 is the flow diagram according to the method for the fault detection for power equipment of one embodiment of the invention.
Fig. 2 is the flow diagram according to the method for the fault detection for power equipment of another embodiment of the present invention.
Fig. 3 is the structural schematic diagram according to the device of the fault detection for power equipment of one embodiment of the invention.
Fig. 4 is the structural schematic diagram according to the device of the fault detection for power equipment of another embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, by the following examples to of the invention further detailed
It describes in detail bright.
Power equipment of the invention specifically can be switchgear or transformer, and can also be other certainly can use this hair
The equipment of bright method.The contact point of power equipment can be the contact position at two positions.Come as an example with switchgear below
It is specifically described.
Switchgear generally has three-phase.There are three the corresponding same attribute contact points of same position, each corresponds to a phase.Phase
The contact position of same parts and another component in switchgear is referred to position, there are three contact points for tool, right respectively
Answer three-phase.If contacting well with the three-phase that attribute contact point pair is answered, without failure, then the resistance of the three-phase and thermal resistance are answered
This is close, and therefore, temperature rise also should be close.Therefore, can by lateral comparison with attribute contact point temperature rise can quickly really
Which, which is determined, mutually there is a problem.
Embodiment one
The present embodiment provides the method for the fault detection for switchgear, executing subject is the fault detection for switchgear
Device, which can integrate in relay, also can be set in computer, can also be separately provided certainly, herein not
It repeats again.
As shown in Figure 1, for according to the method for the fault detection for switchgear of the present embodiment, this method comprises:
Step 101, one group on the three-phase of a switchgear is obtained with respective first temperature rise in attribute contact point, and every group same
Attribute contact point is the corresponding each contact point of same position in switchgear.
Switchgear generally has three-phase, at least one same position is all had on the three-phase.The same position is, for example,
The moving contact of breaker and the contact position of static contact, copper bar and the contact position of casing etc., details are not described herein.Moving contact
Three-phase is corresponded to the contact position of static contact, and the contact position of copper bar and casing also corresponds to three-phase.The present embodiment it is identical
What position indicated is the contact position of same parts and another component in switchgear, and there are three contact points for tool, right respectively
Answer three-phase.Three contact points in same position are referred to as one group with attribute contact point.
Due to identical with position of the attribute contact point in switchgear, in general, corresponding temperature rise also should be identical.
Therefore, the present invention is by comparing with respective first temperature rise in attribute contact point, to judge which breaks down with attribute contact point.
The temperature rise of the present embodiment refers to the difference between the temperature value of contact point and environment temperature.
Step 102, a target temperature rise is determined from each first temperature rise.
The target temperature rise determine according to actual needs, such as can randomly select one, or choose in each first temperature rise
It is worth maximum one and is used as target temperature rise, details are not described herein.The target temperature rise is one group right with one in attribute contact point
The first temperature rise answered, i.e. one in three the first temperature rises.
It is, of course, also possible to first each first temperature rise be normalized according to primary current, such as with one of them the first temperature
Based on rising, normalization operation is executed to the first temperature rise of other two, one is then determined from normalized first temperature rise
Target temperature rise, such as be worth maximum one and be used as target temperature rise.
Step 103, target temperature rise is modified, obtains revised second temperature rise.
Although each phase current difference in same position is little, actually also there is certain imbalance.In order to
This uneven influence to each same attribute contact point is excluded, needs to be modified target temperature rise.Modified mode has very much,
Such as the average value of three electric currents with attribute contact point is taken, target temperature rise can also be modified by fit approach,
Details are not described herein.
Step 104, determine whether same attribute contact point breaks down according to the second temperature rise.
For example, if the second temperature rise is more than preset threshold, it can determine that event occurs for the corresponding contact point of the target
Barrier.
The load as added by a switchgear may be different, can correspond to different operating currents, if adopted
With unified preset threshold, it is more likely that will appear the case where contact point has already appeared failure but do not judge.Therefore,
It can judge whether contact point breaks down by the way of following:
Second temperature rise is compared with benchmark temperature rise, determines in the two that lesser one is third temperature rise, biggish one
A is the 4th temperature rise；
If the 4th temperature rise be greater than the sum of third temperature rise and first setting factor beforehand and the 4th temperature rise be greater than third temperature rise and
The product of one the second setting factor beforehand, it is determined that break down the corresponding same attribute contact point of the 4th temperature rise.
For example, if the second temperature rise compared with benchmark temperature rise after, discovery the second temperature rise be worth it is lesser one,
As third temperature rise, benchmark temperature rise is to be worth biggish one, as the 4th temperature rise.
4th temperature rise is indicated greater than the sum of third temperature rise and first setting factor beforehand, between the 4th temperature rise and third temperature rise
Difference be greater than the first setting factor beforehand, in this way, the corresponding same attribute contact point of the 4th temperature rise is probably broken down.Due to one
When primary current is very big, the temperature rise between each phase will appear difference larger situation under normal contact condition, therefore also
It needs further to verify.4th temperature rise is greater than the product of third temperature rise and first the second setting factor beforehand, it means that from ratio
4th temperature rise is greater than third temperature rise for upper.In this way, when the above two conditions are met, can determine that the 4th temperature rise is corresponding same
Attribute contact point is broken down, and the result determined is more accurate.
According to the present embodiment, determined by one group of the lateral comparison temperature rise with each phase in attribute contact point the contact point which
It mutually breaks down, and first temperature rise to be compared is modified before comparison so that judging result is more accurate, such ratio
More more rapid and convenient, and accuracy is preferable.
Embodiment two
The present embodiment does further supplementary explanation to the method for the fault detection for switchgear of embodiment one.
As shown in Fig. 2, for according to the flow diagram of the method for the fault detection for switchgear of the present embodiment.The party
Method includes:
Step 201, one group on the three-phase of a switchgear is obtained with respective first temperature rise in attribute contact point, and every group same
Attribute contact point is the corresponding each contact point of same position in switchgear.
The step and step 101 are consistent, and details are not described herein.
Step 202, determine that value maximum one is used as target temperature rise from each first temperature rise.
In the present embodiment, target temperature rise is used as by three the first temperature rise intermediate values maximum one.If one group connects with attribute
Three contact points of contact have a contact point to break down, then most possible is exactly the maximum contact of temperature rise value
Point.It first selects value maximum one and is used as target temperature rise, calculation amount can be simplified.
Step 203, selected in remaining two the first temperature rises one it is biggish as benchmark temperature rise.
In step 202, it is one the smallest that each first temperature rise intermediate value can be excluded first.This is because, poor contact meeting
It causes temperature rise higher, excludes in the first temperature rise the smallest one first and first exclude occur likelihood of failure lesser one, with
Simplify algorithm.
It is of course also possible to first carry out step 202, then execute step 203.For example, it is also possible to be first to select three first
Maximum two in temperature rise, value biggish one is then selected from maximum two again and is used as target temperature rise, is worth lesser
One is used as benchmark temperature rise.Specific how selection target temperature rise and benchmark temperature rise do not have sequencing, it is only necessary to which target temperature rise is
Maximum one in three the first temperature rises, benchmark temperature rise is one that three the first temperature rise values are centre.
Step 204, revised second temperature rise Δ K is obtained according to the following formulaCm:
Wherein, Δ KCTo indicate target temperature rise, ICIndicate the primary current of the corresponding same attribute contact point of target temperature rise, IB
Indicate the primary current of the corresponding same attribute contact point of benchmark temperature rise.
Here primary current can be the average value of the primary current in current sample period.For example, Mei Geyi
Whether a sampling period can execute step 201-205, have same attribute contact point to break down to continue to monitor.This is primary
Electric current can be the average value of the primary current in current period, since primary current may be real-time change, using one
Primary current of the average value of primary current as switchgear in the period in sampling period can obtain accurately primary as far as possible
The value of electric current.
Step 205, determine whether same attribute contact point breaks down according to the second temperature rise.
The step 205 and step 104 are consistent, and details are not described herein.
According to the present embodiment, will be worth the smallest first temperature rise exclusion can simplify entire algorithm, and through value in
Between the first temperature rise the first temperature rise maximum to value be modified, can exclude between three-phase caused by current imbalance as far as possible
Temperature rise difference, so that judging result is more accurate.By one group of three temperature rise answered with attribute contact point pair of lateral comparison,
It can be avoided and carry out judging bring defect using unified threshold value.
Embodiment three
The present embodiment does further supplementary explanation to the method for previous embodiment.The present embodiment is mainly aforementioned to how to obtain
Further supplementary explanation is done in the first temperature rise in each embodiment, i.e., first each temperature rise above-mentioned is with the temperature rise of the contact point of prediction
Based on.
In the present embodiment, the three-phase that the same attribute contact point pair of one switchgear of acquisition of previous embodiment is answered respective
One temperature rise includes:
A: the 5th temperature rise of one contact point of one switchgear and knot when one initial sampling period of acquisition starts
The 6th temperature rise when beam, contact point are the contact position of at least two components of switchgear；
B: the time constant of the one order inertia system of a switchgear is obtained；
C: according to the 5th temperature rise, the 6th temperature rise and time constant, the first of contact point at the end of predicting the X sampling period
Temperature rise, X=[LN], wherein L is positive integer and L >=3, s are a sampling period, N*s=time constant.
The initial sampling period, which refers to, needs to obtain the sampling period corresponding to the first temperature rise and the second temperature rise, this is initial
The 1st sampling period that sampling period is not necessarily really sampled.The duration in the sampling period can be according to practical need
It sets, for example, 20-30 minutes.Here the first temperature rise can be considered as the corresponding stable temperature rise in contact point.
Here one order inertia system refers to the response relation of primary current and temperature rise.Under normal circumstances, if primary electricity
Flow constant, when the sampling period reaches 3-5 times of time constant, which should almost reach to a stationary value.It is of course also possible to
The primary current for sampling all sampling periods within 8-9 hour, specifically can be determine according to actual needs.The single order is used
The time constant of property system can be known in advance according to the parameter of system, for example, 100 minutes.
Step a and step b can be executed successively, also be may be performed simultaneously without execution sequence.
Since 3-5 times of time constant temperature rise can reach certain stationary value under normal circumstances, optionally, L's is taken
Value range is further 3-5.[] indicates to be rounded, and can round up or be rounded downwards according to actual needs.One sampling period
What is indicated is a sampling period corresponding time span, certainly the time constant in namely initial sampling period.Due to inciting somebody to action
The current point in time corresponding sampling period, therefore, primary current is corresponding namely, and this was initial as the initial sampling period
The average value of primary current in primary current in sampling period, such as the initial sampling period.It, can be in practice
Determined by setting s the value of N as positive integer, such as time constant be 100 minutes, s can be 25 minutes, such N is exactly 4.
Assuming that L=5, X are exactly 20, it is equivalent in this way 500 minutes, i.e., more than 8 hour.
In the present embodiment, the first pre- thermometric at the end of next sampling can be determined according to the 5th temperature rise and the 6th temperature rise
It rises, the second prediction temperature rise at the end of determining next one sampling period then according to the 6th temperature rise and the first prediction temperature rise, so
Temperature rise is predicted according to the third at the end of the first prediction temperature rise and the second prediction temperature rise again the latter sampling period of determination afterwards,
And so on, at the end of determining the X sampling period contact point the first temperature rise.Specifically can according to the 5th temperature rise and
The heating trend of 6th temperature rise determines the heating trend in next sampling period.First temperature rise is considered as to be predicted
The corresponding stable temperature rise in contact point.
For concrete example, the first temperature rise T of contact point can be determined according to the following formula:
T=(Δ Kn-ΔKn-1*e-1/N)/(1-e-1/N)
Wherein, Δ Kn-1For the 5th temperature rise, Δ KnFor the 6th temperature rise.
The present invention can repeat step a to step c.Such as step a to step c was repeated every 1 minute, in this way
It can predict the temperature rise after corresponding preset time period, always to realize the real time monitoring of the temperature rise to the contact point of switchgear.More
Specifically, in sampling process, step 101 to be repeated since a sampling period to step 103, n represents n-th of sampling
Period, Δ KnFor the corresponding temperature rise of n-th of sampling period, Δ Kn-1For the corresponding temperature rise of (n-1)th sampling period, any one
(n-1)th sampling period is considered as the initial sampling period of the invention, and then executes subsequent step, persistently to preset
The temperature rise of the contact point of switchgear, and then its temperature rise is monitored.
For each same attribute contact point, the first temperature rise of prediction can be obtained using the method for the present embodiment, and will
First temperature rise of the prediction is determined as the stable temperature rise that same attribute contact point pair is answered.
There are also a lot of other modes by the present invention come the prediction temperature rise at the end of determining each sampling period, and details are not described herein.
According to the present invention, temperature rise when being started by obtaining a sampling period at the end of, after preset time period
Temperature predicted, can quickly determine the temperature rise after preset time period in this way, for example, temperature rise stablize after value as first
Temperature rise, and then subsequent some operations are executed by the temperature rise of the prediction, such as whether there is same attribute to contact in previous embodiment
The operation that point breaks down.
Example IV
The present embodiment provides a device for the fault detection of switchgear, for execute embodiment one for switchgear
Fault detection device.
As shown in figure 3, for according to the structural schematic diagram of the device of the fault detection for switchgear of the present embodiment.The dress
It sets including acquiring unit 301, first determination units, 302, amending units 303 and second determination unit
304。
Wherein, acquiring unit 301 is used to obtain one group on the three-phase of a switchgear with attribute contact point respective the
One temperature rise, every group is corresponding three contact points of same position in switchgear with attribute contact point；First determination unit 302 is used for
A target temperature rise is determined from each first temperature rise；Amending unit 303 obtains revised for being modified to target temperature rise
Second temperature rise；Second determination unit 304 is used to determine whether same attribute contact point breaks down according to the second temperature rise.
Optionally, the first determination unit 302 is specifically used for: determining that value maximum one is used as target from each first temperature rise
Temperature rise.
Optionally, amending unit 303 is specifically used for:
Selected in remaining two the first temperature rises one it is biggish as benchmark temperature rise；
Revised second temperature rise Δ K is obtained according to the following formulaCm:
Wherein, Δ KCTo indicate target temperature rise, ICIndicate the primary current of the corresponding same attribute contact point of target temperature rise, IB
Indicate the primary current of the corresponding same attribute contact point of benchmark temperature rise；
Optionally, primary current is the average value of the primary current in current sample period.
Optionally, the second determination unit 304 is specifically used for:
Second temperature rise is compared with benchmark temperature rise, determines in the two that lesser one is third temperature rise, biggish one
A is the 4th temperature rise；
If the 4th temperature rise be greater than the sum of third temperature rise and first setting factor beforehand and the 4th temperature rise be greater than third temperature rise and
The product of one the second setting factor beforehand, it is determined that break down the corresponding same attribute contact point of the 4th temperature rise.
The working method of each unit of the present embodiment is identical as previous embodiment, and details are not described herein.
According to the present embodiment, determined by one group of the lateral comparison temperature rise with each phase in attribute contact point the contact point which
It mutually breaks down, and first temperature rise to be compared is modified before comparison so that judging result is more accurate, such ratio
More more rapid and convenient, and accuracy is preferable.
Embodiment five
The present embodiment remarks additionally to the device of the fault detection for switchgear of previous embodiment.
In the device of the fault detection for switchgear of the present embodiment, acquiring unit 301 specifically includes one first and obtains
Take 3011, one second acquisition subelements 3012 of subelement and a prediction subelement 3013.
Wherein, the one of one switchgear when the first acquisition subelement 3011 starts for obtaining an initial sampling period
5th temperature rise of a contact point and at the end of the 6th temperature rise, contact point be switchgear at least two components contact position
It sets；Second acquisition subelement 3012 is used to obtain the time constant of the one order inertia system an of switchgear；One prediction is single
Member 3013 is used for according to the 5th temperature rise, the 6th temperature rise and time constant, the first of contact point at the end of predicting the X sampling period
Temperature rise, X=[LN], wherein L is positive integer and L >=3, s are a sampling period, N*s=time constant.
Optionally, prediction subelement 3013 is specifically used for:
According to the following formula, the first temperature rise T of contact point is determined:
T=(Δ Kn-ΔKn-1*e-1/N)/(1-e-1/N)
Wherein, Δ Kn-1For the 5th temperature rise, Δ KnFor the 6th temperature rise.
The working method of each unit of the present embodiment is identical as previous embodiment, and details are not described herein.
According to the present invention, temperature rise when being started by obtaining a sampling period at the end of, after preset time period
Temperature predicted, can quickly determine the temperature rise after preset time period in this way, for example, temperature rise stablize after value as first
Temperature rise, and then subsequent some operations are executed by the temperature rise of the prediction, such as whether there is same attribute to contact in previous embodiment
The operation that point breaks down.
The present invention also provides the devices of another fault detection for switchgear.The device include at least one processor and
At least one processor.Wherein, memory is for storing instruction.The instruction execution that processor is used to be stored according to memory is aforementioned
The method of the described fault detection for switchgear of any embodiment.
The embodiment of the present invention also provides a kind of readable storage medium storing program for executing.Machine readable finger is stored in the readable storage medium storing program for executing
It enables, when being executed by a machine, machine executes described in aforementioned any embodiment for switchgear machine readable instructions
The method of fault detection.
Machine readable instructions are stored on the readable medium, which makes to handle when being executed by processor
Device executes any method above-mentioned.Specifically, system or device equipped with readable storage medium storing program for executing can be provided, it is readable at this
Store on storage medium realize above-described embodiment in any embodiment function software program code, and make the system or
The computer or processor of device read and execute the machine readable instructions being stored in the readable storage medium storing program for executing.
In this case, it is real that any one of above-described embodiment can be achieved in the program code itself read from readable medium
The function of example is applied, therefore the readable storage medium storing program for executing of machine readable code and storage machine readable code constitutes of the invention one
Point.
The embodiment of readable storage medium storing program for executing include floppy disk, hard disk, magneto-optic disk, CD (such as CD-ROM, CD-R, CD-RW,
DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), tape, non-volatile memory card and ROM.It selectively, can be by communication network
Network download program code from server computer or on cloud.
It will be appreciated by those skilled in the art that each embodiment disclosed above can be in the situation without departing from invention essence
Under make various changes and modifications.Therefore, protection scope of the present invention should be defined by the appended claims.
It should be noted that step and unit not all in above-mentioned each process and each system construction drawing is all necessary
, certain step or units can be ignored according to the actual needs.Each step execution sequence be not it is fixed, can be according to need
It is adjusted.Apparatus structure described in the various embodiments described above can be physical structure, be also possible to logical construction, that is, have
A little units may be realized by same physical entity, be realized alternatively, some units may divide by multiple physical entities, alternatively, can be with
It is realized jointly by certain components in multiple autonomous devices.
In the above various embodiments, hardware cell mechanically or can be realized electrically.For example, a hardware list
Member or processor may include that permanent dedicated circuit or logic (such as special processor, FPGA or ASIC) are corresponding to complete
Operation.Hardware cell or processor can also include programmable logic or circuit (such as general processor or other programmable processing
Device), interim setting can be carried out by software to complete corresponding operating.Concrete implementation mode (mechanical system or it is dedicated forever
Long property circuit or the circuit being temporarily arranged) it can be determined based on cost and temporal consideration.
Detailed displaying and explanation carried out to the present invention above by attached drawing and preferred embodiment, however the present invention is not limited to
These embodiments having revealed that, base could be aware that with above-mentioned multiple embodiment those skilled in the art, can combine above-mentioned difference
Code audit means in embodiment obtain the more embodiments of the present invention, these embodiments also protection scope of the present invention it
It is interior.
Claims (12)
1. the method for the fault detection for power equipment characterized by comprising
One group on the three-phase of a power equipment is obtained with respective first temperature rise in attribute contact point, is connect described in every group with attribute
Contact is corresponding three contact points of same position in the power equipment；
A target temperature rise is determined from each first temperature rise；
The target temperature rise is modified, revised second temperature rise is obtained；
Determine whether the same attribute contact point breaks down according to second temperature rise.
2. the method according to claim 1, wherein from each first temperature rise determine a target temperature rise,
Include:
Determine that value maximum one is used as target temperature rise from each first temperature rise.
3. according to the method described in claim 2, acquisition is revised it is characterized in that, being modified to the target temperature rise
Second temperature rise includes:
Selected in remaining two first temperature rises one it is biggish as benchmark temperature rise；
Revised second temperature rise Δ K is obtained according to the following formulaCm:
Wherein, Δ KCTo indicate the target temperature rise, ICIndicate the primary electricity of the corresponding same attribute contact point of the target temperature rise
Stream, IBIndicate the primary current of the corresponding same attribute contact point of the benchmark temperature rise；
Optionally, the primary current is the average value of the primary current in current sample period.
4. the method according to claim 1, wherein determining whether the same attribute according to second temperature rise
Whether break down contact point
Second temperature rise is compared with the benchmark temperature rise, determines in the two that lesser one is third temperature rise, it is larger
One be the 4th temperature rise；
If the 4th temperature rise is greater than the sum of the third temperature rise and first setting factor beforehand and the 4th temperature rise is greater than institute
State the product of third temperature rise Yu second setting factor beforehand, it is determined that the corresponding same attribute contact point of the 4th temperature rise occur therefore
Barrier.
5. method according to any of claims 1-4, which is characterized in that the same attribute for obtaining a power equipment connects
Respective first temperature rise of the corresponding three-phase in contact includes:
Obtain an initial sampling period when starting the 5th temperature rise of a contact point of a power equipment and at the end of
The 6th temperature rise, the contact point be the power equipment at least two components contact position；
Obtain the time constant of the one order inertia system an of power equipment；
It is described at the end of predicting the X sampling period to connect according to the 5th temperature rise, the 6th temperature rise and the time constant
First temperature rise of contact, X=[LN], wherein L is positive integer and L >=3, s are a sampling period, time described in N*s=
Constant；
Optionally, according to the 5th temperature rise, the 6th temperature rise and the time constant, predict that the X sampling period terminates
First temperature rise of the contact point Shi Suoshu, comprising:
According to the following formula, the first temperature rise T of the contact point is determined:
T=(Δ Kn-ΔKn-1*e-1/N)/(1-e-1/N)
Wherein, Δ Kn-1For the 5th temperature rise, Δ KnFor the 6th temperature rise.
6. the device of the fault detection for power equipment characterized by comprising
One acquiring unit, one group on three-phase for obtaining a power equipment is the same as respective first temperature in attribute contact point
Rise, described in every group with attribute contact point be the power equipment in corresponding three contact points of same position；
One the first determination unit, for determining a target temperature rise from each first temperature rise；
One amending unit obtains revised second temperature rise for being modified to the target temperature rise；
One the second determination unit, for determining whether the same attribute contact point occurs event according to second temperature rise
Barrier.
7. device according to claim 6, which is characterized in that first determination unit is specifically used for: from each first temperature
Determine that value maximum one is used as target temperature rise in liter.
8. device according to claim 7, which is characterized in that the amending unit is specifically used for:
Selected in remaining two first temperature rises one it is biggish as benchmark temperature rise；
Revised second temperature rise Δ K is obtained according to the following formulaCm:
Wherein, Δ KCTo indicate the target temperature rise, ICIndicate the primary electricity of the corresponding same attribute contact point of the target temperature rise
Stream, IBIndicate the primary current of the corresponding same attribute contact point of the benchmark temperature rise；
Optionally, the primary current is the average value of the primary current in current sample period.
9. device according to claim 6, which is characterized in that second determination unit is specifically used for:
Second temperature rise is compared with the benchmark temperature rise, determines in the two that lesser one is third temperature rise, it is larger
One be the 4th temperature rise；
If the 4th temperature rise is greater than the sum of the third temperature rise and first setting factor beforehand and the 4th temperature rise is greater than institute
State the product of third temperature rise Yu second setting factor beforehand, it is determined that the corresponding same attribute contact point of the 4th temperature rise occur therefore
Barrier.
10. the device according to any one of claim 6-9, which is characterized in that the acquiring unit specifically includes:
One first acquisition subelement, for obtain an initial sampling period start when one of one power equipment contact
Point the 5th temperature rise and at the end of the 6th temperature rise, the contact point be the power equipment at least two components contact
Position；
One second acquisition subelement, the time constant of the one order inertia system for obtaining a power equipment；
One prediction subelement, for predicting X according to the 5th temperature rise, the 6th temperature rise and the time constant
First temperature rise of the contact point at the end of sampling period, X=[LN], wherein L is positive integer and L >=3, s are to adopt described in one
Sample period, time constant described in N*s=；
Optionally, the prediction subelement is specifically used for:
According to the following formula, the first temperature rise T of the contact point is determined:
T=(Δ Kn-ΔKn-1*e-1/N)/(1-e-1/N)
Wherein, Δ Kn-1For the 5th temperature rise, Δ KnFor the 6th temperature rise.
11. the device of the fault detection for power equipment characterized by comprising
At least one processor, for storing instruction；
At least one processor is used for the instruction execution according to claim 1 any one of -5 stored according to the memory
The method of the fault detection for power equipment.
12. readable storage medium storing program for executing, which is characterized in that be stored with machine readable instructions, the machine in the readable storage medium storing program for executing
When being executed by a machine, the machine executes according to any one of claims 1-5 for electric power readable instruction
The method of the fault detection of equipment.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114511120A (en) * | 2022-04-21 | 2022-05-17 | 浙江天铂云科光电股份有限公司 | Power equipment fault diagnosis method based on temperature vision electric wire |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132746A (en) * | 2014-08-13 | 2014-11-05 | 广东电网公司佛山供电局 | Temperature detection method for busbar joint of gas insulation switch equipment |
| CN104535221A (en) * | 2014-12-25 | 2015-04-22 | 山东康威通信技术股份有限公司 | Intelligent analysis method based on distributive optical fiber temperature measurement |
| CN104568197A (en) * | 2015-02-10 | 2015-04-29 | 上海庆晖科技有限公司 | Transformer substation hot-spot detection sensor device |
| CN105044492A (en) * | 2015-06-24 | 2015-11-11 | 温州大学 | Low-voltage electrical complete switch equipment temperature rise test system |
| CN105203885A (en) * | 2015-10-10 | 2015-12-30 | 上海博英信息科技有限公司 | Carrying capacity analysis method based on passive and wireless temperature measurement of ring main unit busbar |
| CN106451201A (en) * | 2016-08-31 | 2017-02-22 | 杭州申昊科技股份有限公司 | Inspection system for transformer substation |
| CN109406004A (en) * | 2018-09-18 | 2019-03-01 | 广东电网有限责任公司惠州供电局 | A kind of switchgear temperature rise analytical method |
| CN109412173A (en) * | 2018-10-31 | 2019-03-01 | 国网江苏省电力有限公司太仓市供电分公司 | A kind of parallel capacitor complete equipment overheat method for early warning based on the temperature difference |
-
2019
- 2019-03-15 CN CN201910199961.2A patent/CN109932594B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132746A (en) * | 2014-08-13 | 2014-11-05 | 广东电网公司佛山供电局 | Temperature detection method for busbar joint of gas insulation switch equipment |
| CN104535221A (en) * | 2014-12-25 | 2015-04-22 | 山东康威通信技术股份有限公司 | Intelligent analysis method based on distributive optical fiber temperature measurement |
| CN104568197A (en) * | 2015-02-10 | 2015-04-29 | 上海庆晖科技有限公司 | Transformer substation hot-spot detection sensor device |
| CN105044492A (en) * | 2015-06-24 | 2015-11-11 | 温州大学 | Low-voltage electrical complete switch equipment temperature rise test system |
| CN105203885A (en) * | 2015-10-10 | 2015-12-30 | 上海博英信息科技有限公司 | Carrying capacity analysis method based on passive and wireless temperature measurement of ring main unit busbar |
| CN106451201A (en) * | 2016-08-31 | 2017-02-22 | 杭州申昊科技股份有限公司 | Inspection system for transformer substation |
| CN109406004A (en) * | 2018-09-18 | 2019-03-01 | 广东电网有限责任公司惠州供电局 | A kind of switchgear temperature rise analytical method |
| CN109412173A (en) * | 2018-10-31 | 2019-03-01 | 国网江苏省电力有限公司太仓市供电分公司 | A kind of parallel capacitor complete equipment overheat method for early warning based on the temperature difference |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114511120A (en) * | 2022-04-21 | 2022-05-17 | 浙江天铂云科光电股份有限公司 | Power equipment fault diagnosis method based on temperature vision electric wire |
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