CN109932592A

CN109932592A - The method and apparatus that failure for power equipment determines

Info

Publication number: CN109932592A
Application number: CN201910199372.4A
Authority: CN
Inventors: 官建涛; 张激; 王浩; 师康; 付俊华; 赵吉生
Original assignee: Siemens Power Automation Ltd
Current assignee: Siemens Power Automation Ltd
Priority date: 2019-03-15
Filing date: 2019-03-15
Publication date: 2019-06-25
Anticipated expiration: 2039-03-15
Also published as: WO2020187778A1; CN109932592B

Abstract

The present invention relates to the method and apparatus that the failure for power equipment determines, method includes: to obtain the real-time temperature rise of at least one contact point of power equipment, and the contact point is the contact position of at least two components of the power equipment；Obtain the corresponding primary current in the contact point；According to the real-time temperature rise of the primary current and the contact point, determine whether the contact point breaks down.In accordance with the invention it is possible to which the power equipment for different loads carries out specific aim judgement, avoids using unified threshold value the failure for judging the power equipment of different loads and lead to the situation for judging inaccuracy.

Description

The method and apparatus that failure for power equipment determines

Technical field

The present invention relates to field of power systems, the method and apparatus especially determined for the failure 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 is generally obtained by the temperature probe being placed in environment.

Under different loads due to switchgear, generated temperature rise is not fixed, therefore, using the maximum allowable of unification Temperature rise judges whether contact point breaks down, it is possible to the case where reporting by mistake.

Summary of the invention

In view of this, the invention proposes the methods that the failure for power equipment determines, comprising:

Obtain power equipment at least one contact point real-time temperature rise, the contact point be the power equipment at least The contact position of two components；

Obtain the corresponding primary current in the contact point；

According to the real-time temperature rise of the primary current and the contact point, determine whether the contact point breaks down.

Since the load of power equipment is related to primary current, and primary current directly affects the temperature rise of contact point, because This breaks down to determine whether to have point of contact, in this way can by combining the corresponding primary current in contact point and real-time temperature rise Specific aim judgement is carried out for the power equipment of different loads, avoids using unified threshold value and judges the electric power of different loads The failure of equipment and cause judgement inaccuracy situation.

According to method as described above, optionally, the real-time temperature rise for obtaining at least one contact point of power equipment includes:

First temperature rise of one contact point of one power equipment and knot when one initial sampling period of acquisition starts The second temperature rise when beam；

According to the real-time temperature rise of the primary current and the contact point, determine whether the contact point breaks down packet It includes:

Obtain the time constant of the one order inertia system an of power equipment；

According to first temperature rise, second temperature rise and the time constant, institute at the end of predicting the X sampling period The third temperature rise of contact point is stated, the X=[LN], wherein L is positive integer and L >=3, s are a sampling period, N*s= The time constant of the one order inertia system of the power equipment；

According to the third temperature rise and the primary current, it is determined whether have point of contact failure.

By predicting the temperature rise of the contact point of power equipment, then determine by the temperature rise contact resistance and thermal resistance of contact point Product value, and then determine whether contact point breaks down by the product value.In such manner, it is possible to after power equipment start-up operation It determines whether contact point breaks down in the shorter time, and then guarantees service life and the relevant staff of power equipment Safety.

According to method as described above, optionally, according to the following formula, the third temperature rise T of the contact point is determined:

T=(Δ K_n-ΔK_n-1*e^-1/N)/(1-e^-1/N)

Wherein, Δ K_n-1For first temperature rise, Δ K_nFor second temperature rise.

According to method as described above, optionally, the sampling period is -30 minutes 20 minutes, and the L is 3-5.

According to method as described above, optionally, the primary current is the primary electricity in the initial sampling period The average value of stream.Since primary current may be real-time change, made using the average value of primary current in a sampling period For the primary current of power equipment in the period, the value of accurate primary current can be obtained as far as possible.

According to method as described above, optionally, according to the third temperature rise and the primary current, it is determined whether connect It breaks down contact

Obtain the rated current and preset standard alarm threshold value of the power equipment；

According to the rated current, the primary current and the standard alarm threshold value, the power equipment is determined Current alerts temperature rise threshold value；

If the third temperature rise is greater than or equal to the current alerts temperature rise threshold value, alarm is issued；

According to method as described above, optionally, the current alerts temperature rise threshold value Δ K is determined according to the following formula_W:

Wherein, Δ K_RIndicate the standard alarm threshold value of the power equipment, I_RIndicate the specified electricity of the power equipment Stream, I_WIndicate the primary current, K_ConstantIndicate preset temperature rise redundancy.

Be compared using the stable temperature rise of prediction with identified current alerts temperature rise threshold value, and according to comparison result come Determine whether to issue alarm, can detect whether the contact point of power equipment breaks down quickly in this way, to guarantee electric power The service life of equipment and the safety of staff.

According to method as described above, optionally, the K_ConstantValue be 3-5 DEG C.

According to method as described above, optionally, at least one described contact point is on the three-phase of the power equipment One group, with attribute contact point, contacts described in every group with attribute contact point for same position in the power equipment corresponding three Point；

According to the third temperature rise and the primary current, it is determined whether the failure that has point of contact includes:

A first object temperature rise is determined from each third temperature rise；

The first object temperature rise is modified, revised 4th temperature rise is obtained；

Determine whether the same attribute contact point breaks down according to the 4th 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 third temperature rise, comprising: from Determine that value maximum one is used as first object temperature rise in each third temperature rise；

According to method as described above, optionally, the first object temperature rise is modified, obtains the revised 4th Temperature rise includes:

Selected in remaining two third temperature rises one it is biggish as the first benchmark temperature rise；

Revised 4th temperature rise Δ K is obtained according to the following formula_Cm:

Wherein, Δ K_CTo indicate the first object temperature rise, I_CIndicate the corresponding same attribute contact point of the target temperature rise Primary current, I_BIndicate the primary current of the corresponding same attribute contact point of the first benchmark temperature rise.

According to method as described above, optionally, the same attribute contact point is determined whether according to the 4th temperature rise Whether break down and includes:

4th temperature rise is compared with the first benchmark temperature rise, determine in the two lesser one for the 5th temperature It rises, biggish one is the 6th temperature rise；

If the 6th temperature rise is greater than the sum of the 5th temperature rise and first setting factor beforehand and the 6th temperature rise is big In the product of the 5th temperature rise and the 4th setting factor beforehand, it is determined that the corresponding same attribute contact point of the 6th temperature rise goes out Existing failure.

According to method as described above, optionally, each contact point is with the contact that connects；

After obtaining the real-time temperature rise of at least one contact point of power equipment, further includes:

Temperature rise group will be judged as one with corresponding each real-time temperature rise；

Judge to select a second target temperature rise in temperature rise group at one, remaining temperature rise, which is used as, refers to temperature rise；

A second benchmark temperature rise is determined according to each reference temperature rise；

According to the second target temperature rise and the second benchmark temperature rise, the corresponding contact of the second target temperature rise is determined Whether point breaks down.

Determined whether to have point of contact with the real-time temperature rise of multiple contact points in phase failure by longitudinal comparison, it should Mode algorithm is simple, convenient and efficient.

According to method as described above, optionally, using each average value with reference to temperature rise as the second benchmark temperature It rises；

According to method as described above, optionally, if meeting following formula, it is determined that the second target temperature rise is corresponding It breaks down contact point:

If the second target temperature rise is greater than the sum of the second benchmark temperature rise and first setting factor beforehand and described the Two target temperature rises are greater than the product of the temperature rise of the second benchmark and second setting factor beforehand, it is determined that the second target temperature rise is corresponding Contact point break down.

The present invention also provides the devices that the failure for power equipment determines, comprising:

One first acquisition unit, the real-time temperature rise of at least one contact point suitable for obtaining power equipment are described to connect Contact is the contact position of at least two components of the power equipment；

One second acquisition unit is suitable for obtaining the corresponding primary current in the contact point；

One the first determination unit determines institute suitable for the real-time temperature rise according to the primary current and the contact point State whether contact point breaks down.

According to device as described above, optionally, the first acquisition unit it is particularly applicable to:

First determination unit specifically includes:

One acquisition subelement, the time constant of the one order inertia system suitable for obtaining a power equipment；

One prediction subelement is suitable for according to first temperature rise, second temperature rise and the time constant, prediction The third temperature rise of the contact point at the end of the X sampling period, the X=[LN], wherein L is positive integer and L >=3, s mono- A sampling period, the time constant of the one order inertia system of power equipment described in N*s=；

One determining failure subelement is suitable for according to the third temperature rise and the primary current, it is determined whether connect It breaks down contact.

According to device as described above, optionally, according to the following formula, the third temperature rise T of the contact point is determined:

T=(Δ K_n-ΔK_n-1*e^-1/N)/(1-e^-1/N)

Wherein, Δ K_n-1For first temperature rise, Δ K_nFor second temperature rise；

According to device as described above, optionally, the sampling period is -30 minutes 20 minutes, and the L is 3-5；

According to device as described above, optionally, the primary current is the primary electricity in the initial sampling period The average value of stream.Since primary current may be real-time change, made using the average value of primary current in a sampling period For the primary current of power equipment in the period, the value of accurate primary current can be obtained as far as possible.

According to device as described above, optionally, the determining failure subelement it is particularly applicable to:

According to device as described above, optionally, the current alerts temperature rise threshold value Δ K is determined according to the following formula_W:

According to device as described above, optionally, the K_ConstantValue be 3-5 DEG C.

According to device as described above, optionally, at least one described contact point is on the three-phase of the power equipment One group, with attribute contact point, contacts described in every group with attribute contact point for same position in the power equipment corresponding three Point；

The determining failure subelement it is particularly applicable to:

According to device as described above, optionally, a target temperature rise is determined from each third temperature rise, comprising: from Determine that value maximum one is used as first object temperature rise in each third temperature rise.

According to device as described above, optionally, the first object temperature rise is modified, obtains the revised 4th Temperature rise includes:

According to device as described above, optionally, each contact point is with the contact that connects；Described device further include:

One judging unit is suitable for judge temperature rise group as one with corresponding each real-time temperature rise；

One selecting unit selects a second target temperature rise suitable for judging at one temperature rise group, remaining temperature rise is made For with reference to temperature rise；

One determination the second benchmark temperature rise unit, suitable for determining a second benchmark temperature according to each reference temperature rise It rises；

One the second determination unit is suitable for determining institute according to the second target temperature rise and the second benchmark temperature rise State whether the corresponding contact point of the second target temperature rise breaks down.

According to device as described above, optionally, using each average value with reference to temperature rise as the second benchmark temperature It rises.

According to device as described above, optionally, second determination unit it is particularly applicable to:

The present invention provides the device determined for the failure of power equipment again, comprising:

At least one processor, for storing instruction；

At least one processor, the instruction execution for being used to be stored according to the memory is as above described in any item to be used for The method that the failure of power equipment determines.

The present invention provides readable storage medium storing program for executing again, and machine readable instructions, the machine are stored in the readable storage medium storing program for executing When being executed by a machine, the machine is executed according to described in any item events for power equipment as above device readable instruction Hinder determining method.

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 of the method determined according to the failure for power equipment of one embodiment of the invention.

Fig. 2 is the flow diagram of the method determined according to the failure for power equipment of another embodiment of the present invention.

Fig. 3 is the flow diagram of the method determined according to the failure for power equipment of yet another embodiment of the invention.

Fig. 4 is the flow diagram of the method determined according to the failure for power equipment of further embodiment of this invention.

Fig. 5 is the flow diagram of the method determined according to the failure for power equipment of another embodiment of the present invention.

Fig. 6 is the structural schematic diagram of the device determined according to the failure for power equipment of one embodiment of the invention.

Fig. 7 is the structural schematic diagram of the device determined according to the failure for power equipment of another embodiment of the present invention.

Fig. 8 is the structural schematic diagram of the device determined according to the failure for power equipment of one embodiment of the 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.

Inventors have found that the load of switchgear is related with primary current, load is bigger, and primary current is bigger, and load is smaller, Primary current is smaller.In addition, primary current affects the temperature rise of each contact point.Here temperature rise refer to the temperature of contact point with Difference between environment temperature.For example, if the temperature of contact point is 35 DEG C, environment temperature is 25 DEG C, then temperature rise is 10 DEG C. If primary current remains unchanged, after about 8-9 hour, temperature rise can stablize in a fixed value.In simple terms, i.e., currently The accumulation of electrical current of about 8-9 determines before point temperature rise thus.On the other hand, i.e., the primary current butt contact before 8-9 hour The influence of current temperature rise can be ignored.In addition, contact point connects when phenomena such as poor contact, loosen occurs in contact point Electric shock resistance will change, and become larger, generally far more than normal range (NR).Correspondingly, temperature rise can also become larger.

Embodiment one

The present embodiment provides the methods that the failure for switchgear determines, in computer or protective relaying device, this method Executing subject be for switchgear fault detection device, the device can integrate in temperature transducer, can also be independent Setting, details are not described herein.

As shown in Figure 1, for the flow diagram of the method determined according to this exemplary failure for switchgear.

Step 101, the real-time temperature rise of at least one contact point of switchgear is obtained, contact point is at least two of switchgear The contact position of component.

In the present embodiment, the real-time temperature rise of contact point refers to the difference between the real time temperature of contact point and environment temperature Value.The real-time temperature rise is also possible to the average value of the temperature rise of contact point in the corresponding sampling period, naturally it is also possible to be a certain sampling The real-time temperature rise at time point.

The contact point of switchgear is the contact position of at least two components, for example, moving contact and static contact contact position, Copper bar and the contact position of casing etc., i.e. contact point can be the contact either bus contact point of switchgear, no longer superfluous herein It states.

Step 102, the corresponding primary current in contact point is obtained.

The primary current of the present embodiment refers on high-tension side electric current.In practical operation, primary current can be one and adopt The average value of primary current in sample period or multiple sampling periods, naturally it is also possible to be the primary current of a certain sampling time point. Specifically can determine according to actual needs, details are not described herein.

Step 101 and step 102 do not have sequencing, can carry out, can also successively carry out simultaneously.

Step 103, according to the real-time temperature rise of primary current and contact point, determine whether contact point breaks down.

For example, a target component, target ginseng first can be determined according to the real-time temperature rise of primary current and contact point Number can determine according to actual needs, it is e.g. stable after temperature rise, be also possible to parameter relevant to temperature rise, such as contact point Resistance and thermal resistance product, it is subsequent to be specifically described.

For example, what a threshold value preset, which is compared with threshold value, and then whether determines contact point It breaks down；It is, of course, also possible to obtain the target component of multiple contact points simultaneously, and mutually it is compared, and then determine whether It has point of contact and breaks down, specifically can determine according to actual needs, details are not described herein.

Since the load of switchgear is related to primary current, and primary current directly affects the temperature rise of contact point, therefore It, in this way can be right by being broken down to determine whether to have point of contact in conjunction with the corresponding primary current in contact point and real-time temperature rise Specific aim judgement is carried out in the switchgear of different loads, avoids using unified threshold value the switchgear for judging different loads Failure and cause judgement inaccuracy situation.

Embodiment two

The method that the present embodiment determines the failure for switchgear of embodiment one does further supplementary explanation.

As shown in Fig. 2, the flow diagram of the method determined for the failure for switchgear according to the present embodiment.The party Method includes:

Step 201, the first temperature rise of one contact point of one switchgear when one initial sampling period of acquisition starts The second temperature rise at the end of and.

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.First temperature rise and the second temperature rise can be obtained by temperature sensor, the temperature sensing Device may be mounted at the position at contact point or near contact point.

Step 202, the time constant of the one order inertia system an of switchgear is obtained.

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.

The step 202 and step 201 can be executed successively, also be may be performed simultaneously without execution sequence.

Step 203, according to the first temperature rise, the second temperature rise and time constant, contact point at the end of predicting the X sampling period Third temperature rise, X=[LN], wherein L is positive integer and L >=3, s are a sampling period, N*s=time constant.

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.Practical fortune In, can be determined by setting s the value of N as positive integer, such as time constant be 100 minutes, s can be 25 minutes, this Sample 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 first temperature rise and the second temperature rise It rises, the second prediction temperature rise at the end of determining next one sampling period then according to the second 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 third temperature rise.Specifically can according to the first temperature rise and The heating trend of second temperature rise determines the heating trend in next sampling period.The third temperature rise is considered as to be predicted The corresponding stable temperature rise in contact point.

For concrete example, the third temperature rise T of contact point can be determined according to the following formula:

T=(Δ K_n-ΔK_n-1*e^-1/N)/(1-e^-1/N)

Wherein, Δ K_n-1For the first temperature rise, Δ K_nFor the second temperature rise.

The present invention can repeat step 201 to step 203.Such as step is repeated every 30 seconds or 1 minute 201, to step 203, can predict the temperature rise after corresponding preset time period, always in this way to realize to the contact point of switchgear The real time monitoring of temperature rise.More specifically, in sampling process, step 201 is repeated since a sampling period to step 203, n represent n-th of sampling period, Δ K_nFor the corresponding temperature rise of n-th of sampling period, Δ K_n-1For (n-1)th sampling period pair The temperature rise answered, any one actual (n-1)th sampling period is considered as the initial sampling period of the invention, and then holds The subsequent step of row, with the temperature rise of the contact point of lasting preset switches cabinet, and then is monitored its temperature rise.

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.

Step 204, according to the real-time temperature rise of primary current and contact point, determine whether contact point breaks down.

For example, according to the following formula, the contact resistance of contact point and the product of thermal resistance are determined:

T=Iw²*R*Rθ

Wherein, Iw indicates that primary current, R indicate that the contact resistance of contact point, R θ indicate the thermal resistance of contact point.

Specifically, for example, if target component is greater than contact resistance and thermal resistance of the contact point under normal contact condition Product and the sum of a default error, i.e. target component=R*R θ+r, wherein R is contact resistance, and R θ is thermal resistance, and r is default Error then illustrates that the target component is excessive, and contact point is broken down.Here r can be set according to actual needs, herein no longer It repeats.

What the product of contact resistance and thermal resistance reflected is the connection status of switch cabinet system itself, unrelated with input, is answered The holding is stablized.Determine whether contact point breaks down by the product of the contact resistance of contact point and thermal resistance, accuracy compared with It is good.

It is, of course, also possible to determine whether contact point breaks down using other way, details are not described herein.

According to the present embodiment, connecing for contact point is determined by the temperature rise of the contact point of monitoring switch cabinet, then by the temperature rise The product value of electric shock resistance and thermal resistance, and then determine whether contact point breaks down by the product value.In such manner, it is possible in switchgear It determines whether contact point breaks down in the shorter time after start-up operation, and then guarantees service life and the correlation work of switchgear Make the safety of personnel.

Embodiment three

The method that the present embodiment determines the failure for switchgear of embodiment two makees further supplementary explanation.

As shown in figure 3, the flow diagram of the method determined for the failure for switchgear according to the present embodiment.The party Method includes:

Step 301, the first temperature rise of one contact point of one switchgear when one initial sampling period of acquisition starts The second temperature rise at the end of and.

The step and step 201 are consistent, and details are not described herein.

Step 302, the time constant of the one order inertia system an of switchgear is obtained.

The step and step 202 are consistent, and details are not described herein.

Step 303, according to the first temperature rise, the second temperature rise and time constant, contact point at the end of predicting the X sampling period Third temperature rise, X=[LN], wherein L is positive integer and L >=3, s are a sampling period, N*s=time constant.

The step and step 203 are consistent, and details are not described herein.

Step 304, the rated current and preset standard alarm threshold value of switchgear are obtained.

Rated current refers to electrical equipment under rated voltage, electric current when according to rated power operation.Also it may be defined as Electrical equipment can be with the electricity of long continuous operation under nominal environment condition (environment temperature, sunshine, height above sea level, mounting condition etc.) Stream.Standard alarm threshold value can be the alarm temperature rise threshold value of national regulation, be also possible to user determine according to actual needs Alarm temperature rise threshold value, can specifically set, details are not described herein according to actual needs.

The step 302 and abovementioned steps do not have ordinal relation.

Step 305, according to rated current, primary current and standard alarm threshold value, the current alerts of switchgear are determined Temperature rise threshold value.

Here primary current refers to the primary current of the switchgear obtained in real time, is also possible to currently corresponding one The average value of primary current in a sampling week, such as the average value of the primary current in the initial sampling period, can also be The average value of primary current in preset time period can also be primary current corresponding to current point in time certainly, specifically may be used To select according to actual needs.The primary current of the present embodiment refers on high-tension side electric current.

The step can specifically include:

Current alerts temperature rise threshold value Δ K is determined according to the following formula_W:

Wherein, Δ K_RIndicate standard alarm threshold value, I_RIndicate rated current, I_WIndicate current primary current, K_Constant Indicate preset temperature rise redundancy.The K_ConstantValue can set according to actual needs, such as 3 DEG C -5 DEG C.

Step 306, if third temperature rise is greater than or equal to current alerts temperature rise threshold value, alarm is issued.

The mode for issuing alarm has very much, such as is prompted by sound, text or image, and short message can also be sent At to corresponding responsible person, details are not described herein.

If third temperature rise is less than current alerts temperature rise threshold value, it can again return to and execute step 301, to reach real-time prison The purpose of control.Here third temperature rise can be used as the temperature rise after a stabilization.

Be compared using the third temperature rise of prediction with identified current alerts temperature rise threshold value, and according to comparison result come Determine whether to issue alarm, can detect whether the contact point of switchgear breaks down quickly in this way, to guarantee switchgear Service life and staff safety.

Example IV

The method that the present embodiment determines the failure for switchgear of embodiment two makees further supplementary explanation.This implementation In example, at least one contact point is one group on the three-phase of switchgear with attribute contact point, and every group is switch with attribute contact point Corresponding three contact points of same position in cabinet.

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.

As shown in figure 4, the flow diagram of the method determined for the failure for switchgear according to the present embodiment.The party Method includes:

Step 401, the first temperature rise of one contact point of one switchgear when one initial sampling period of acquisition starts The second temperature rise at the end of and.

The step and step 201 are consistent, and details are not described herein.

Step 402, the time constant of the one order inertia system an of switchgear is obtained.

The step and step 202 are consistent, and details are not described herein.

Step 403, according to the first temperature rise, the second temperature rise and time constant, contact point at the end of predicting the X sampling period Third temperature rise, X=[LN], wherein L is positive integer and L >=3, s are a sampling period, N*s=time constant.

The step and step 203 are consistent, and details are not described herein.

Step 404, a first object temperature rise is determined from each third temperature rise；

The target temperature rise determine according to actual needs, such as can randomly select one, or choose in each third temperature rise It is worth maximum one and is used as first object temperature rise, details are not described herein.The first object temperature rise is one group in attribute contact point A corresponding third temperature rise, i.e. one in three third temperature rises.

It is, of course, also possible to first each third temperature rise be normalized according to primary current, such as with one of third temperature Based on rising, normalization operation is executed to other two third temperature rise, one is then determined from normalized third temperature rise First object temperature rise, such as be worth maximum one and be used as first object temperature rise.

Step 405, first object temperature rise is modified, obtains revised 4th 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 first object temperature rise.Modified mode has Very much, such as the average value of three electric currents with attribute contact point is taken, it can also be by fit approach come to first object temperature rise It is modified, details are not described herein.

For example, can be selected in remaining two third temperature rises one it is biggish as the first benchmark temperature rise.

In step 404, it is one the smallest that each third temperature rise intermediate value can be excluded first.This is because, poor contact meeting Cause temperature rise higher, the smallest one first excludes occur likelihood of failure lesser one first in exclusion third temperature rise, with Simplify algorithm.

For example, it is also possible to be first to select in three third temperature rises maximum two, then selected from maximum two again It selects out and is worth biggish one as first object temperature rise, be worth lesser one and be used as the first benchmark temperature rise.Specifically how to select the One target temperature rise and the first benchmark temperature rise do not have sequencing, it is only necessary to which first object temperature rise is maximum in three third temperature rises One, the first benchmark temperature rise is one that three third temperature rise values are centre.

More specifically, revised 4th temperature rise Δ K is obtained according to the following formula_Cm:

Wherein, Δ K_CTo indicate first object temperature rise, I_CIndicate the primary of the corresponding same attribute contact point of first object temperature rise Electric current, I_BIndicate the primary current of the corresponding same attribute contact point of the first 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 401-406, 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.Correspondingly, the initial sampling period of current sample period i.e. step 401.

Step 406, determine whether same attribute contact point breaks down according to the 4th temperature rise.

For example, if the 4th 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:

4th temperature rise is compared with the first benchmark temperature rise, determines in the two that lesser one is the 5th temperature rise, it is larger One be the 6th temperature rise；

If the 6th temperature rise be greater than the sum of the 5th temperature rise and first setting factor beforehand and the 6th temperature rise be greater than the 5th temperature rise and The product of one the 4th setting factor beforehand, it is determined that break down the corresponding same attribute contact point of the 6th temperature rise.

For example, if the 4th temperature rise compared with the first benchmark temperature rise after, discovery the 4th temperature rise be value lesser one A, as the 5th temperature rise, the first benchmark temperature rise is to be worth biggish one, as the 6th temperature rise.

6th temperature rise is indicated greater than the sum of the 5th temperature rise and first setting factor beforehand, between the 6th temperature rise and the 5th temperature rise Difference be greater than the first setting factor beforehand, in this way, the corresponding same attribute contact point of the 6th 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.6th temperature rise is greater than the product of the 5th temperature rise and first the 4th setting factor beforehand, it means that from ratio 6th temperature rise is greater than the 5th temperature rise for upper.In this way, when the above two conditions are met, can determine that the 6th temperature rise is corresponding same Attribute contact point is broken down, and the result determined is more accurate.First setting factor beforehand is, for example, 3 DEG C -5 DEG C, and second is pre- If the factor is, for example, 1.2-1.5, 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 method that the present embodiment determines the failure for switchgear of previous embodiment does further supplementary explanation.This reality It applies in example, the contact point in step 201 is with the contact that connects.Such as at least part in one group of contact point of phase.

As shown in figure 5, the flow diagram of the method determined for the failure for switchgear according to the present embodiment.The party Method includes:

Step 501, the real-time temperature rise of the corresponding each phase in each contact point an of switchgear is obtained.

Real-time temperature rise in the step can be obtained by the way that the temperature sensor near contact point is arranged in.It need to point out It is, it should be equal with the corresponding primary current in contact is connected.

Step 502, temperature rise group will be judged as one with corresponding each real-time temperature rise.

For example, the real time temperature of each contact point corresponding for A is A1, A2, A3 ..., and Am sentences as one Disconnected temperature rise group, m is positive integer；The real time temperature of the corresponding each contact point B is B1, B2, B3 ... Bm, as a judgement temperature Rise group；The real time temperature of the corresponding each contact point C is C1, C2, C3 ... Cm, judges temperature rise group as one.

Step 503, judge to select a second target temperature rise in temperature rise group at one, remaining temperature rise, which is used as, refers to temperature rise.

With A to corresponding judgement temperature rise group as an example for, it is assumed that A1 as the second target temperature rise, A2 to An be ginseng Examine temperature rise.

Step 504, a second benchmark temperature rise is determined with reference to temperature rise according to each.

The second benchmark temperature rise can be all temperature rise intermediate values that refer to and be located in the middle a temperature rise value, can also be worth minimum One, can also be value maximum one.Of course, it is possible to using each average value with reference to temperature rise as the second benchmark temperature rise.It lifts For example, i.e. the second benchmark temperature rise is equal to (A2+A3+A4+ ...+Am)/(m-1).

Step 505, according to the second target temperature rise and the second benchmark temperature rise, determine that the corresponding contact point of the second target temperature rise is It is no to break down.

For example, if meeting following formula, it is determined that break down the corresponding contact point of the second target temperature rise: if second Target temperature rise is greater than the sum of the second benchmark temperature rise and first setting factor beforehand and the second target temperature rise is greater than the second benchmark temperature rise With the product of second setting factor beforehand, it is determined that break down the corresponding contact point of the second target temperature rise.

Second target temperature rise is greater than to be indicated with reference to the sum of temperature rise and first setting factor beforehand, the second target temperature rise and reference Difference between temperature rise is greater than the first setting factor beforehand, in this way, the corresponding contact point of the second target temperature rise is probably broken down. When very big due to primary current, the temperature rise between each phase will appear difference larger situation under normal contact condition, Therefore it also needs further to verify.Second target temperature rise is greater than the product with reference to temperature rise and first the second setting factor beforehand, this meaning Taste from ratio for the second target temperature rise be greater than refer to temperature rise.In this way, when the above two conditions are met, can determine It breaks down the corresponding contact point of two target temperature rises.Such judging result is more accurate.First setting factor beforehand is, for example, 3 DEG C -5 DEG C, the second setting factor beforehand is, for example, 1.2-1.5, and details are not described herein.

For the real-time temperature rise in each judgement temperature rise group, it can be used as the second target temperature rise and then continue subsequent to sentence It is disconnected.

According to the present embodiment, determine whether to contact with the real-time temperature rise of multiple contact points in phase by longitudinal comparison Point breaks down, and which algorithm is simple, convenient and efficient.

It should be pointed out that in the present invention, if completely executing above-described embodiment two, embodiment three, example IV or embodiment Five any one method determines that corresponding contact point is broken down, then can determine that the contact point is broken down really, subsequent Alarm can be issued.It is of course also possible to take any number of combinations in above-described embodiment to determine whether contact point is real It breaks down, realizes multiple authentication, details are not described herein.

Embodiment six

The present embodiment provides the device that one determines for the failure of switchgear, for execute embodiment one for switchgear Failure determine method.

As shown in fig. 6, the schematic device of the device determined for the failure for switchgear according to the present embodiment.The dress It sets including 601, second acquisition units 602 of a first acquisition unit and first determination unit 603.

Wherein, first acquisition unit 601 is suitable for obtaining the real-time temperature rise of at least one contact point of switchgear, contact point For the contact position of at least two components of switchgear；Second acquisition unit 602 is suitable for obtaining the corresponding primary electricity in contact point Stream；First determination unit 603 is suitable for the real-time temperature rise according to primary current and contact point, determines whether contact point event occurs Barrier.

The working method of each unit of the present embodiment is identical as previous embodiment, and details are not described herein.

Embodiment seven

The device that the present embodiment determines the failure for switchgear of embodiment six makees further supplementary explanation.

The first acquisition unit 601 of the present embodiment it is particularly applicable to:

The first temperature rise and end of one contact point of one switchgear when one initial sampling period of acquisition starts When the second temperature rise.

Correspondingly, as shown in fig. 7, the first determination unit 603 specifically includes 6031, prediction of an acquisition subelement Unit 6032 and a determining failure subelement 6033.Wherein, subelement 6031 is obtained to be suitable for obtaining the one of a switchgear The time constant of rank inertia system；Predict that subelement 6032 is suitable for according to the first temperature rise, the second temperature rise and time constant, prediction The third temperature rise of contact point at the end of the X sampling period, X=[LN], wherein L is positive integer and L >=3, s are a sampling week Phase, N*s=time constant；Determine that failure subelement 6033 is suitable for according to third temperature rise and primary current, it is determined whether connect It breaks down contact.The determination failure subelement 6033 can specifically be connect with second acquisition unit 602.

Optionally, according to the following formula, the third temperature rise T of contact point is determined:

T=(Δ K_n-ΔK_n-1*e^-1/N)/(1-e^-1/N)

Wherein, Δ K_n-1For the first temperature rise, Δ K_nFor the second temperature rise；

Optionally, the sampling period is -30 minutes 20 minutes, L 3-5；

Optionally, primary current is the average value of the primary current in the initial sampling period.

The present embodiment determines that the contact of contact point is electric by the temperature rise of the contact point of monitoring switch cabinet, then by the temperature rise The product value of resistance and thermal resistance, and then determine whether contact point breaks down by the product value.In such manner, it is possible to start in switchgear It determines whether contact point breaks down in the shorter time after work, and then guarantees service life and the related work people of switchgear The safety of member.

Embodiment eight

The device that the present embodiment determines the failure for switchgear of embodiment seven makees further supplementary explanation.

In the present embodiment, determine failure subelement 6033 it is particularly applicable to:

Obtain the rated current and preset standard alarm threshold value of switchgear；

According to rated current, primary current and standard alarm threshold value, the current alerts temperature rise threshold value of switchgear is determined；

If third temperature rise is greater than or equal to current alerts temperature rise threshold value, alarm is issued；

Optionally, current alerts temperature rise threshold value Δ K is determined according to the following formula_W:

Wherein, Δ K_RIndicate the standard alarm threshold value of switchgear, I_RIndicate the rated current of switchgear, I_WIndicate primary Electric current, K_ConstantIndicate preset temperature rise redundancy；

Optionally, K_ConstantValue be 3-5 DEG C.

Be compared using the stable temperature rise of prediction with identified current alerts temperature rise threshold value, and according to comparison result come Determine whether to issue alarm, can detect whether the contact point of switchgear breaks down quickly in this way, to guarantee switchgear Service life and staff safety.

Embodiment nine

In the present embodiment, at least one contact point is one group on the three-phase of switchgear with attribute contact point, and every group belongs to Property contact point be switchgear in corresponding three contact points of same position；

Determine failure subelement 6033 it is particularly applicable to:

First object temperature rise is modified, revised 4th temperature rise is obtained；

Determine whether same attribute contact point breaks down according to the 4th temperature rise；

Optionally, a target temperature rise is determined from each third temperature rise, comprising: determine that value is maximum from each third temperature rise One is used as first object temperature rise；

Optionally, first object temperature rise is modified, obtaining revised 4th temperature rise includes:

Wherein, Δ K_CTo indicate first object temperature rise, I_CIndicate the primary electricity of the corresponding same attribute contact point of target temperature rise Stream, I_BIndicate the primary current of the corresponding same attribute contact point of the first benchmark temperature rise.

More specifically, determine failure subelement 6033 it is particularly applicable to:

Embodiment ten

The present embodiment to it is aforementioned be in embodiment for switchgear failure determine device make further supplementary explanation.

In the present embodiment, each contact point is with the contact that connects.The device 800 that the failure for being used for switchgear determines is in addition to preceding It states except first acquisition unit 601, second acquisition unit 602 included by embodiment and first determination unit 603, also wraps It includes the second benchmark temperature rise unit 803 of the determination of selecting unit 802, one of judging unit 801, one and one second determines list Member 804.

Wherein, judging unit 801 is suitable for judge temperature rise group as one with corresponding each real-time temperature rise；Selection is single Member 802 selects a second target temperature rise suitable for judging at one temperature rise group, remaining temperature rise, which is used as, refers to temperature rise；Determine Two benchmark temperature rise units 803 are suitable for determining a second benchmark temperature rise with reference to temperature rise according to each；Second determination unit 804 is applicable in According to the second target temperature rise and the second benchmark temperature rise, determine whether the corresponding contact point of the second target temperature rise breaks down.

Optionally, using each average value with reference to temperature rise as the second benchmark temperature rise.

Optionally, the second determination unit 804 it is particularly applicable to:

If the second target temperature rise is greater than the sum of the second benchmark temperature rise and first setting factor beforehand and the second target temperature rise is big In the product of the second benchmark temperature rise and second setting factor beforehand, it is determined that event occurs for the corresponding contact point of the second target temperature rise Barrier.

It is noted that the device in previous embodiment, if determining that corresponding contact point occurs according to any one method Failure can then determine that the contact point is broken down really, subsequent to issue alarm.It is of course also possible to take above-mentioned implementation Any number of combinations in example determine whether contact point really breaks down, and realize multiple authentication, details are not described herein.

The present invention also provides the devices that another failure for switchgear determines.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 that the described failure for switchgear of any embodiment determines.

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 that failure determines.

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, stored on the readable storage medium storing program for executing Realize above-described embodiment in any embodiment function software program code, and make the system or device computer or Processor reads and executes 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

1. the method that the failure for power equipment determines characterized by comprising

The real-time temperature rise of at least one contact point of power equipment is obtained, the contact point is at least two of the power equipment The contact position of component；

Obtain the corresponding primary current in the contact point；

2. the method according to claim 1, wherein obtaining the real-time temperature of at least one contact point of power equipment It rises and includes:

Obtain an initial sampling period when starting the first temperature rise of a contact point of a power equipment and at the end of The second temperature rise；

According to the real-time temperature rise of the primary current and the contact point, determining whether the contact point breaks down includes:

Obtain the time constant of the one order inertia system of the power equipment；

It is described at the end of predicting the X sampling period to connect according to first temperature rise, second temperature rise and the time constant The third temperature rise of contact, the X=[LN], wherein L is positive integer and L >=3, s are a sampling period, described in N*s= Time constant；

According to the third temperature rise and the primary current, it is determined whether have point of contact failure；

Optionally, according to the following formula, the third temperature rise T of the contact point is determined:

T=(Δ K_n-ΔK_n-1*e^-1/N)/(1-e^-1/N)

Optionally, the sampling period is -30 minutes 20 minutes, and the L is 3-5；

Optionally, the primary current is the average value of the primary current in the initial sampling period.

3. according to the method described in claim 2, it is characterized in that, being determined according to the third temperature rise and the primary current The failure that whether has point of contact includes:

According to the rated current, the primary current and the standard alarm threshold value, working as the power equipment is determined Preceding alarm temperature rise threshold value；

Optionally, the current alerts temperature rise threshold value Δ K is determined according to the following formula_W:

Wherein, Δ K_RIndicate the standard alarm threshold value of the power equipment, I_RIndicate the rated current of the power equipment, I_W Indicate the primary current, K_ConstantIndicate preset temperature rise redundancy；

Optionally, the K_ConstantValue be 3-5 DEG C.

4. according to the method described in claim 2, it is characterized in that, at least one described contact point is the three of the power equipment One group in phase with attribute contact point is that same position is three corresponding in the power equipment described in every group with attribute contact point Contact point；

Determine whether the same attribute contact point breaks down according to the 4th temperature rise；

Optionally, the first object temperature rise is modified, obtaining revised 4th temperature rise includes:

Wherein, Δ K_CIndicate the first object temperature rise, I_CIndicate the one of the corresponding same attribute contact point of the first object temperature rise Primary current, I_BIndicate the primary current of the corresponding same attribute contact point of the first benchmark temperature rise.

5. according to the method described in claim 4, it is characterized in that, determining whether the same attribute according to the 4th temperature rise Whether break down contact point

4th temperature rise is compared with the first benchmark temperature rise, determines in the two that lesser one is the 5th temperature rise, Biggish one is the 6th temperature rise；

If the 6th temperature rise is greater than the sum of the 5th temperature rise and first setting factor beforehand and the 6th temperature rise is greater than institute State the product of the 5th temperature rise and the 4th setting factor beforehand, it is determined that the corresponding same attribute contact point of the 6th temperature rise occur therefore Barrier.

6. method according to any one of claims 1-5, which is characterized in that each contact point is with the contact that connects；

According to the second target temperature rise and the second benchmark temperature rise, determine that the corresponding contact point of the second target temperature rise is It is no to break down；

Optionally, using each average value with reference to temperature rise as the second benchmark temperature rise；

Optionally, if meeting following formula, it is determined that break down the corresponding contact point of the second target temperature rise:

If the second target temperature rise is greater than the sum of the second benchmark temperature rise and first setting factor beforehand and second mesh Mark the product that temperature rise is greater than the temperature rise of the second benchmark and second setting factor beforehand, it is determined that the second target temperature rise is corresponding to be connect It breaks down contact.

7. the device that the failure for power equipment determines characterized by comprising

One first acquisition unit, the real-time temperature rise of at least one contact point suitable for obtaining power equipment, the contact point For the contact position of at least two components of the power equipment；

One the first determination unit connects described in determination suitable for the real-time temperature rise according to the primary current and the contact point Whether break down contact.

8. device according to claim 7, which is characterized in that the first acquisition unit it is particularly applicable to:

First determination unit specifically includes:

One prediction subelement is suitable for predicting X according to first temperature rise, second temperature rise and the time constant The third temperature rise of the contact point at the end of a sampling period, the X=[LN], wherein L is positive integer and L >=3, s are one The sampling period, the time constant of the one order inertia system of power equipment described in N*s=；

One determining failure subelement is suitable for according to the third temperature rise and the primary current, it is determined whether have point of contact It breaks down；

T=(Δ K_n-ΔK_n-1*e^-1/N)/(1-e^-1/N)

Optionally, the sampling period is -30 minutes 20 minutes, and the L is 3-5；

9. device according to claim 8, which is characterized in that the determining failure subelement it is particularly applicable to:

Optionally, the K_ConstantValue be 3-5 DEG C.

10. device according to claim 8, which is characterized in that at least one described contact point is the power equipment One group on three-phase with attribute contact point is same position corresponding three in the power equipment described in every group with attribute contact point A contact point；

The determining failure subelement it is particularly applicable to:

Wherein, Δ K_CTo indicate the first object temperature rise, I_CIndicate the primary of the corresponding same attribute contact point of the target temperature rise Electric current, I_BIndicate the primary current of the corresponding same attribute contact point of the first benchmark temperature rise.

11. device according to claim 10, which is characterized in that the determining failure subelement it is particularly applicable to:

4th temperature rise is compared with the benchmark temperature rise, determines in the two that lesser one is the 5th temperature rise, it is larger One be the 6th temperature rise；

12. device according to any one of claims 7-11, which is characterized in that each contact point is same is in contact Point；Described device further include:

One selecting unit selects a second target temperature rise suitable for judging at one temperature rise group, remaining temperature rise is as ginseng Examine temperature rise；

One determination the second benchmark temperature rise unit, suitable for determining a second benchmark temperature rise according to each reference temperature rise；

One the second determination unit, is suitable for according to the second target temperature rise and the second benchmark temperature rise, determines described the Whether break down the corresponding contact point of two target temperature rises；

Optionally, second determination unit it is particularly applicable to:

13. the device that the failure for power equipment determines 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 -6 stored according to the memory The method that the failure for power equipment determines.

14. 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 claim 1 to 6 for electric power readable instruction The method that the failure of equipment determines.