CN106950450B - The method for early warning and equipment of protective relaying device secondary circuit failure - Google Patents
The method for early warning and equipment of protective relaying device secondary circuit failure Download PDFInfo
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- CN106950450B CN106950450B CN201710254177.8A CN201710254177A CN106950450B CN 106950450 B CN106950450 B CN 106950450B CN 201710254177 A CN201710254177 A CN 201710254177A CN 106950450 B CN106950450 B CN 106950450B
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- 230000001681 protective effect Effects 0.000 title claims abstract description 190
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000001960 triggered effect Effects 0.000 claims abstract description 79
- 230000004224 protection Effects 0.000 claims description 34
- 238000005259 measurement Methods 0.000 claims description 17
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000035772 mutation Effects 0.000 description 4
- 238000003745 diagnosis Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000013024 troubleshooting Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 208000032368 Device malfunction Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004313 potentiometry Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
Abstract
The present invention provides the method for early warning and equipment of a kind of protective relaying device secondary circuit failure, this method comprises: S1, obtains the recorded wave file of multiple protective relaying devices that are mutually related；S2, according to the recorded wave file, if existence anduniquess is triggered starting or the first protective relaying device of starting of not being triggered uniquely in the protective relaying device, determining the secondary circuit of first protective relaying device, there are failures；Otherwise, it is determined that for there is no failures.By judging in multiple associated protective relaying devices with the presence or absence of the protective relaying device of be uniquely triggered starting or unique starting that is not triggered; it not only can detecte the steady state fault inside protective relaying device; and it can effectively identify the intermittent hidden failure of secondary circuit and issue warning signal; convenient for excluding hidden danger in time, the safe operation of electric system is maintained.
Description
Technical field
The present invention relates to field of electrical equipment, and in particular to the method for early warning of protective relaying device secondary circuit failure and sets
It is standby.
Background technique
Secondary circuit is the electric loop that the work of primary equipment is monitored, controls, measures, adjusts and protected, should
Circuit is by measuring instrumentss, relay, control and signal element, automatic device, protective relaying device, electric current, voltage transformer etc.
It is formed by connecting by certain requirement.
Wherein, relay protection electric signal double measurement circuit by outside protective relaying device current/voltage mutual inductor,
Signal transmitting device (voltage transmitter and current transducer) inside signal transmission wire and protective relaying device, signal tune
Manage the links such as circuit (low-pass filter etc.) and A/D converter composition.Once any one in these links breaks down, such as mutually
Sensor characteristic mutates, signal transmssion line intrusion interference signal, signal transmitting device fail or A/D converter is impaired etc., all will
Influence the accuracy of electric signal parameter measurements.
In order to detect the failure of secondary circuit, it is dedicated that the prior art generallys use examination lamp, insulation resistance meter or multimeter etc.
Equipment is detected.Wherein traditional mode is that multimeter measures potentiometry, i.e., by using general-purpose table segmenting amount circuit current potential,
It is otherwise open circuit if circuit has positive and negative 110V current potential over the ground can determine whether that circuit is access.
But the above method is only applicable to the permanent fault in circuit, i.e., electrification or uncharged state on circuit.Relay
The early period for protecting double measurement loop fault to occur, many failures are intermittences, and phenomenon of the failure is not serious, will not be immediately
Lead to protective relaying maloperation, belongs to implicity failure.These failures are difficult to be found by traditional detection means, but if letting alone not
Pipe, it is likely that catastrophe failure can be developed into, electrical measurement is caused gross error occur, causing protective relaying device not just
Positive motion is made, and the safe and stable operation of electric system is threatened.
Summary of the invention
For the defect that the ability existing in the prior art detected to secondary circuit intermittence hidden failure is poor,
The method for early warning and equipment of present invention offer protective relaying device secondary circuit failure.
The method for early warning of an aspect of of the present present invention offer protective relaying device secondary circuit failure, comprising: S1 is obtained multiple
Be mutually related the recorded wave file of protective relaying device；S2, according to the recorded wave file, if existing in the protective relaying device
First protective relaying device of unique be triggered starting or the starting that is not triggered uniquely, then determine first protective relaying device
Secondary circuit there are failures；Otherwise, it is determined that for there is no failures.
Wherein, after being judged to that failure is not present in the step S2, the method also includes: S3, according to the recording
File is protected if existing in the protective relaying device with discrepant second relay of the measured value of protective relaying device described in other
Protection unit, then determining the secondary circuit of second protective relaying device, there are failures.
Wherein, the measured value includes the fundamental voltage amplitude of Startup time and/or surveyed busbar voltage of being triggered.
Wherein, the protective relaying device that is mutually related in the step S1 refers to: in the different routes for coupling identical bus
On the protective relaying device that is respectively arranged.
Wherein, if there is the quilt with protective relaying device described in other in the protective relaying device in the step S3
If triggering discrepant second protective relaying device of Startup time includes: to judge being triggered for k-th of protective relaying device
Startup time meets following formula, then k-th of protective relaying device is second protective relaying device:
Wherein, tiBe triggered at the time of start for i-th of protective relaying device, M be triggered starting it is described after
The sum of electrical protective device, Δ T=1/f, wherein f is sample frequency.
Wherein, if there is the institute with protective relaying device described in other in the protective relaying device in the step S3
If discrepant second protective relaying device of fundamental voltage amplitude for surveying busbar voltage includes: to judge k-th of protective relaying device
The fundamental voltage amplitude of surveyed busbar voltage meet following formula, then k-th of protective relaying device is second relay protection dress
It sets:
Wherein, UiBy i-th of protective relaying device be triggered starting after survey busbar voltage fundamental voltage amplitude, M
For the sum of the protective relaying device for the starting that is triggered, UNFor the voltage rating of bus, KresFor safety factor.
The source of early warning of another aspect of the present invention offer protective relaying device secondary circuit failure, comprising: obtain module, use
In the recorded wave file for obtaining multiple protective relaying devices that are mutually related；First warning module is used for according to the recorded wave file,
If existence anduniquess is triggered starting or the first protective relaying device of starting of not being triggered uniquely in the protective relaying device,
Determining the secondary circuit of first protective relaying device, there are failures；Otherwise, it is determined that for there is no failures.
Wherein, the equipment further include: the second warning module, when being determined as in first warning module there is no failure
Afterwards, it is used for according to the recorded wave file, if there is the measurement with protective relaying device described in other in the protective relaying device
It is worth discrepant second protective relaying device, then determining the secondary circuit of second protective relaying device, there are failures.
Wherein, the measured value includes the fundamental voltage amplitude of Startup time and/or surveyed busbar voltage of being triggered.
Wherein, the protective relaying device that is mutually related refers to: cloth is distinguished on the different routes for coupling identical bus
The protective relaying device set.
The method for early warning and equipment of protective relaying device secondary circuit failure provided by the invention, by judging multiple correlations
With the presence or absence of the protective relaying device of be uniquely triggered starting or unique starting that is not triggered in the protective relaying device of connection, not only
It can detecte the steady state fault inside protective relaying device, and can effectively identify that the intermittent hidden failure of secondary circuit is concurrent
Pre-warning signal out maintains the safe operation of electric system convenient for excluding hidden danger in time.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the process signal of the method for early warning of protective relaying device secondary circuit failure provided in an embodiment of the present invention
Figure；
Fig. 2 be another embodiment of the present invention provides the process of method for early warning of protective relaying device secondary circuit failure show
It is intended to；
Fig. 3 be another embodiment of the present invention provides analog network schematic diagram；
Fig. 4 is the structural representation of the source of early warning of protective relaying device secondary circuit failure provided in an embodiment of the present invention
Figure.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention is explicitly described, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
The failure wave-recording file of microcomputer protecting device is utilized to identify that the intermittence of secondary circuit is hidden in the embodiment of the present invention
Containing failure.Wherein, secondary circuit can refer to transformation station protective relaying device double measurement circuit, but the protection of the embodiment of the present invention
Range is without being limited thereto.
Relay protection can be triggered starting in following situations: (1) electric system is broken down or is disturbed, and causes voltage or electricity
Signal of stream mutates, and the signal sampling value of microcomputer protecting device is made to mutate；(2) relay protection electric signal
Double measurement circuit is broken down, and the signal sampling value of microcomputer protecting device is caused to mutate.Microcomputer protecting device is come
It says, starting algorithm can detect the mutation of signal, and starting protection algorithm.
For above situation (1), if failure occurs in the protection scope of protective relaying device, device can issue guarantor
Protect action signal；If failure or disturbance occur outside the protection scope of protective relaying device, protective device completes failure
Meeting involution, does not issue action signal after processing routine.
For above situation (2), if the failure of secondary circuit is more serious, protective relaying device may malfunction；But
Under normal circumstances, will not then make such as the initial stage of failure since the failure of secondary circuit is not serious enough or the duration falls short of
Protective relaying device malfunction, but there is still a need for diagnosis in time in this case.
Compare the above situation (1) for causing protection to start and (2).In above situation (1), due to the correlation of electric signal
Property, the mutation of a certain electric signal can generally cause the mutation of its coherent signal simultaneously, as short trouble causes current signal prominent
So increase, while will lead to the bust of associated voltage signal.And in above situation (2), due to the independence of secondary circuit, two
The mutation of signal sampling value caused by minor loop failure will not make the sampled value of other related electric signals also mutate.
Using this difference, the reason of causing relay protection to start can be distinguished.
Fig. 1 is the process signal of the method for early warning of protective relaying device secondary circuit failure provided in an embodiment of the present invention
Figure, as shown in Figure 1, this method comprises: S1, obtains the recorded wave file of multiple protective relaying devices that are mutually related；S2, according to institute
Recorded wave file is stated, if existence anduniquess is triggered starting or the first relay of starting of not being triggered uniquely in the protective relaying device
Protective device then determines the secondary circuit of first protective relaying device there are failure and issues warning signal；Otherwise, it does not send out
Pre-warning signal out.
In step sl, when the part being mutually related in multiple protective relaying devices is triggered starting, at its failure
After the completion of reason, the recorded wave file that each protective relaying device generates respectively is read.Relay protection largely uses Microcomputer Protection at present
Device is protected, and when electric system is broken down or is disturbed, microcomputer protecting device starts and carries out failure wave-recording.
Wherein, failure wave-recording is the important component of relay protection, by the starting of failure amount, records failure front and back
The change procedure of electrical quantity and non-electric quantity in a period of time, and recorded wave file is generated, assist failure to recollect analysis to reach
Purpose.Recorded wave file may include multiple electrical quantity, such as voltage, electric current and power.
In step s 2, judged according to the recorded wave file that step S1 is obtained.If being mutually related multiple relay protections
Some device in device is triggered starting, and other devices are not triggered when starting, then show the circuit of electric system
There is no failures, and only failure has occurred in the secondary circuit of the device of the starting that is triggered, and just causes unique relay
Protective device starts protection.Therefore, it can issue warning signal.
The starting if some device in multiple protective relaying devices that is mutually related is not triggered, and other devices are touched
Hair starting, then show that failure has occurred in the circuit of electric system, and the device for not being triggered starting does not have starting protection to be then
Since failure has occurred in the secondary circuit of the device, its inactive protection is just caused.Accordingly it is also possible to issue warning signal.
When unique starting or unique the first inactive protective relaying device are not present in multiple protective relaying devices, then sentence
Disconnected be not present contains faulty secondary circuit, does not issue warning signal.
The method for early warning of protective relaying device secondary circuit failure provided in an embodiment of the present invention, by judging multiple correlations
With the presence or absence of the protective relaying device of be uniquely triggered starting or unique starting that is not triggered in the protective relaying device of connection, not only
It can detecte the steady state fault inside protective relaying device, and can effectively identify that the intermittent hidden failure of secondary circuit is concurrent
Pre-warning signal out maintains the safe operation of electric system convenient for excluding hidden danger in time.
Based on the above embodiment, after being judged to that failure is not present in the step S2, the method also includes: S3, root
According to the recorded wave file, if existing in the protective relaying device discrepant with the measured value of protective relaying device described in other
Second protective relaying device, then determining the secondary circuit of second protective relaying device, there are failures.
If the first relay of judge not to be triggered uniquely in step S2 starting or the starting that is not triggered uniquely is protected
Protection unit does not issue warning signal in S2 then, then the method that embodiment provides can be opened according to recorded wave file being triggered
Dynamic protective relaying device is further judged.
In step s3, if the difference between the specific measured value of the same race of each protective relaying device is smaller, show
Each secondary circuit is normal；If the measured value of a certain protective relaying device and the difference of other devices are larger, show the dress
The secondary circuit set may have occurred failure, can issue warning signal.By to the specific of multiple association protective relaying devices
Measured value of the same race between be compared, can each secondary circuit of accurate judgement implicity failure.
Based on the above embodiment, wherein the measured value includes the base of Startup time and/or surveyed busbar voltage of being triggered
Wave amplitude.Specifically, it can choose the Startup time that is triggered of protective relaying device as specific measured value, also can choose
The fundamental voltage amplitude of voltage measured by protective relaying device is as specific measured value, and to being mutually related, multiple relay protections are filled
It sets and is compared.If wherein some device and other devices differ greatly, it may determine that the secondary circuit of the device exists
Implicity failure, issues warning signal.Wherein it is possible to select one in above-mentioned two particular measurement value as decision content,
It can be by two simultaneous selections.
Based on the above embodiment, wherein the protective relaying device that is mutually related in the step S1 refers to: identical coupling
The protective relaying device being respectively arranged on the different routes of bus.Specifically, it can arrange on the same bus of substation and not go the same way
The protective relaying device installed on line associated apparatus each other, the comparison of more associated apparatus can effectively inhibit external fault or disturbance
Interference.
Based on the above embodiment, wherein if exist in the protective relaying device in the step S3 with described in other
If discrepant second protective relaying device of the Startup time that is triggered of protective relaying device includes: to judge k-th of relay
The Startup time that is triggered of protective device meets following formula, then k-th of protective relaying device is second relay protection dress
It sets:
Wherein, tiBe triggered at the time of start for i-th of protective relaying device, M be triggered starting it is described after
The sum of electrical protective device, Δ T=1/f, wherein f is sample frequency.
Specifically, if one Startup time that is triggered in multiple protective relaying devices meets above-mentioned formula, table
The Startup time of the bright device differs greatly with the Startup time of other devices, and there are implicity events in the secondary circuit of the device
Barrier, issues warning signal.It is triggered the difference of Startup time by the device that is mutually related, relay protection dress has been effectively detected
Set internal intermittent transient fault.
Based on the above embodiment, wherein if exist in the protective relaying device in the step S3 with described in other
If discrepant second protective relaying device of the fundamental voltage amplitude of the surveyed busbar voltage of protective relaying device includes: to judge k-th
The fundamental voltage amplitude of the surveyed busbar voltage of the protective relaying device meets following formula, then k-th of protective relaying device is institute
State the second protective relaying device:
Wherein, UiBy i-th of protective relaying device be triggered starting after survey busbar voltage fundamental voltage amplitude, M
For the sum of the protective relaying device for the starting that is triggered, UNFor the voltage rating of bus, KresIt is reliable to be for safety factor
Several value ranges is 0.05~0.1.
Specifically, if the fundamental voltage amplitude of one surveyed busbar voltage in multiple protective relaying devices meets above-mentioned public affairs
Formula then shows the fundamental voltage amplitude difference of the fundamental voltage amplitude of the surveyed busbar voltage of the device and the surveyed busbar voltage of other devices
It is larger, there are implicity failure in the secondary circuit of the device, issue warning signal.The base of the voltage as measured by each device
Wave amplitude carrys out the steady-state performance in detection device internal measurement circuit.
In order to further illustrate method provided by the above embodiment, Fig. 2 be another embodiment of the present invention provides secondary returning
The flow diagram of the method for road fault pre-alarming, Fig. 3 be another embodiment of the present invention provides analog network schematic diagram.
As shown in figure 3, building model using Matlab/Simulink, simulation test is carried out.The network is female by a confluence
Line and four routes connecting with bus form, and F is abort situation in figure, and R1~R4 is protective relaying device.
In first citing, implicity failure is not present in the measurement circuit of R1~R4, and it is short that three-phase ground is arranged at F
Road failure carries out emulation testing.As shown in Figure 2, the specific steps are as follows:
Step 1: arrangement R1~R4 is associated protective relaying device each other；
Step 2: at the 1000ms moment, failure is set.R1~R4 is respectively in 1001ms, 1001ms, 1002ms and 1001ms quilt
Triggering starting.After the completion of its troubleshooting, its failure wave-recording file is read；
Step 3:R1~R4 is triggered starting, does not issue warning signal；
Step 4: comparing R1~R4 and be triggered with the presence or absence of difference at the time of starting, there are t1=1001ms, t2=
1001ms、t3=1002ms and t4=1001ms, wherein sample frequency f is 2000 hertz.According to previously described formula (1), to t1~t4Point
It is not calculated, formula (1) is not satisfied, does not issue warning signal；
Step 5: compare R1~R4 be triggered measured voltage after starting fundamental voltage amplitude with the presence or absence of difference, there are U1
=0.232, U2=0.246, U3=0.249 and U4=0.253 (being per unit value).According to previously described formula (2), to U1~U4Respectively into
Row calculates, and formula (2) are not satisfied, do not issue warning signal.
It is not issued warning signal in the above diagnosis algorithm, determines that implicity event is not present in the measurement circuit of R1~R4
Barrier, this diagnostic result are consistent with default.
In second citing, one implicity failure is set in the measurement circuit of R4, three-phase ground short circuit is set at F
Failure carries out emulation testing.Set implicity failure is that voltage transmitter output is short-circuited in this example, voltage obtained
Transmitter result is zeroed out, but the protection scope of the embodiment of the present invention is without being limited thereto.As shown in Figure 2, the specific steps are as follows:
Step 1: arrangement R1~R4 is associated protective relaying device each other；
Step 2: at the 1000ms moment, failure is set.R1~R4 is respectively in 1001ms, 1001ms, 1002ms and 1001ms quilt
Triggering starting.After the completion of its troubleshooting, its failure wave-recording file is read；
Step 3:R1~R4 is triggered starting, does not issue warning signal；
Step 4: comparing R1~R4 and be triggered with the presence or absence of difference at the time of starting, there are t1=1001ms, t2=
1001ms、t3=1002ms and t4=1001ms, wherein sample frequency f is 2000 hertz.According to previously described formula (1), to t1~t4Point
It is not calculated, previously described formula (1) is not satisfied, does not issue warning signal；
Step 5: compare R1~R4 be triggered measured voltage after starting fundamental voltage amplitude with the presence or absence of difference, there are U1
=0.232, U2=0.246, U3=0.249 and U4=0.012kV (being per unit value), according to previously described formula (2), to U1~U4Respectively
It is calculated, wherein having
Meet previously described formula (2), determines that the measurement circuit of R4 there are implicity failure, issues warning signal.The above diagnosis step
There are implicity failures in the rapid measurement circuit for determining R4, are consistent with default.Therefore, above-mentioned two citing can illustrate the present invention
The method that embodiment provides is able to achieve the early warning to the implicity failure of secondary circuit.It should be noted that the example above provides
Method the step of and sequence only for illustrating that above-described embodiment, the protection scope of the present embodiment are without being limited thereto.
Fig. 4 is the structural representation of the source of early warning of protective relaying device secondary circuit failure provided in an embodiment of the present invention
Figure, as shown in figure 4, the equipment includes: to obtain module 401, for obtaining the recording of multiple protective relaying devices that are mutually related
File；First warning module 402 is used for according to the recorded wave file, if existence anduniquess is triggered in the protective relaying device
First protective relaying device of starting or the starting that is not triggered uniquely, then determine the secondary circuit of first protective relaying device
There are failures；Otherwise, it is determined that for there is no failures.
Specifically, complete in its troubleshooting when the part being mutually related in multiple protective relaying devices is triggered starting
Cheng Hou obtains module 401 and reads the recorded wave file that each protective relaying device generates respectively.Relay protection at present is largely using micro-
Machine protective device is protected, and when electric system is broken down or is disturbed, microcomputer protecting device starts and carries out failure wave-recording.
Specifically, the first warning module 402 is judged according to the recorded wave file that module 401 obtains is obtained.If mutually closing
Some device in multiple protective relaying devices of connection is triggered starting, and other devices are not triggered when starting, then table
There is no failures for the circuit of bright electric system, and only failure has occurred in the secondary circuit of the device of the starting that is triggered,
It causes unique protective relaying device and starts protection.Therefore, the first warning module 402 can issue warning signal.
The starting if some device in multiple protective relaying devices that is mutually related is not triggered, and other devices are touched
Hair starting, then show that failure has occurred in the circuit of electric system, and the device for not being triggered starting does not have starting protection to be then
Since failure has occurred in the secondary circuit of the device, its inactive protection is just caused.Therefore, the first warning module 402 can also
To issue warning signal.
When unique starting or unique the first inactive protective relaying device are not present in multiple protective relaying devices, then sentence
Disconnected be not present contains faulty secondary circuit, and the first warning module 402 does not issue warning signal.
The source of early warning of protective relaying device secondary circuit failure provided in an embodiment of the present invention, by judging multiple correlations
With the presence or absence of the protective relaying device of be uniquely triggered starting or unique starting that is not triggered in the protective relaying device of connection, not only
It can detecte the steady state fault inside protective relaying device, and can effectively identify that the intermittent hidden failure of secondary circuit is concurrent
Pre-warning signal out maintains the safe operation of electric system convenient for excluding hidden danger in time.
Based on the above embodiment, the equipment further include: the second warning module is sentenced when in first warning module 402
It is set to there is no after failure, for according to the recorded wave file, if existing in the protective relaying device and relay described in other
Discrepant second protective relaying device of the measured value of protective device, then determine the secondary circuit of second protective relaying device
There are failures.
Specifically, if there is no uniquely be triggered starting or the starting that is not triggered uniquely in the first warning module 402
Protective relaying device, then the second warning module can be carried out according to protective relaying device of the recorded wave file to the starting that is triggered into one
Step judgement.
If the difference between the specific measured value of the same race of each protective relaying device is smaller, show that each secondary circuit is equal
It is normal；If the measured value of a certain protective relaying device and the difference of other devices are larger, show the secondary circuit of the device
It may have occurred failure, the second warning module can issue warning signal.By to the specific of multiple association protective relaying devices
Measured value of the same race between be compared, can each secondary circuit of accurate judgement implicity failure.
Based on the above embodiment, wherein the measured value includes the base of Startup time and/or surveyed busbar voltage of being triggered
Wave amplitude.Specifically, the second warning module can choose the Startup time that is triggered of protective relaying device as specific measurement
Value, it is also an option that the fundamental voltage amplitude of voltage measured by protective relaying device is as specific measured value, to being mutually related
Multiple protective relaying devices are compared.If wherein some device and other devices differ greatly, the second warning module can
Secondary circuit to judge the device is further sent out pre-warning signal there are implicity failure.Wherein it is possible to select above-mentioned two
One in particular measurement value is used as decision content, can also be by two simultaneous selections.
Based on the above embodiment, wherein the protective relaying device that is mutually related refers to: coupling identical bus not
The protective relaying device that collinear road is respectively arranged.
The method for early warning and equipment of protective relaying device secondary circuit failure provided by the invention, by judging multiple correlations
With the presence or absence of the protective relaying device of be uniquely triggered starting or unique starting that is not triggered in the protective relaying device of connection, not only
It can detecte the steady state fault inside protective relaying device, and can effectively identify that the intermittent hidden failure of secondary circuit is concurrent
Pre-warning signal out maintains the safe operation of electric system convenient for excluding hidden danger in time.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (5)
1. a kind of method for early warning of protective relaying device secondary circuit failure characterized by comprising
S1 obtains the recorded wave file of multiple protective relaying devices that are mutually related；
S2, according to the recorded wave file, if in the protective relaying device existence anduniquess be triggered starting or be not triggered uniquely
First protective relaying device of starting, then determining the secondary circuit of first protective relaying device, there are failures；Otherwise, it is determined that
For there is no failures；
Wherein, after being judged to that failure is not present in the step S2, the method also includes:
S3, according to the recorded wave file, if there is the measurement with protective relaying device described in other in the protective relaying device
It is worth discrepant second protective relaying device, then determining the secondary circuit of second protective relaying device, there are failures；
Wherein, the measured value includes the fundamental voltage amplitude of Startup time and/or surveyed busbar voltage of being triggered；
Wherein, it is triggered if existing in the protective relaying device in the step S3 with protective relaying device described in other
Discrepant second protective relaying device of Startup time includes:
If judging the Startup time t that is triggered of k-th of protective relaying devicekMeet following formula, then k-th of relay protection
Device is second protective relaying device:
Wherein, tiIt is triggered at the time of start for i-th of protective relaying device, M is the relay protection of starting of being triggered
The sum of device, Δ T=1/f, wherein f is sample frequency.
2. the method according to claim 1, wherein the protective relaying device that is mutually related in the step S1 is
Refer to:
The protective relaying device being respectively arranged on the different routes for coupling identical bus.
3. if the method according to claim 1, wherein deposited in the protective relaying device in the step S3
Include: in discrepant second protective relaying device of the fundamental voltage amplitude of the surveyed busbar voltage with protective relaying device described in other
If judging the fundamental voltage amplitude U of the surveyed busbar voltage of k-th of protective relaying devicekMeet following formula, then described k-th
Protective relaying device is second protective relaying device:
Wherein, UiThe fundamental voltage amplitude for the survey busbar voltage after starting that is triggered by i-th of protective relaying device, M is is touched
Send out the sum of the protective relaying device of starting, UNFor the voltage rating of bus, KresFor safety factor.
4. a kind of source of early warning of protective relaying device secondary circuit failure characterized by comprising
Module is obtained, for obtaining the recorded wave file of multiple protective relaying devices that are mutually related；
First warning module, for according to the recorded wave file, if existence anduniquess is triggered starting in the protective relaying device
Or the first protective relaying device of the starting that is not triggered uniquely, then determine that the secondary circuit of first protective relaying device exists
Failure；Otherwise, it is determined that for there is no failures；
Wherein, further includes:
Second warning module is used for after being judged to that failure is not present in first warning module according to the recorded wave file,
It is filled if existing in the protective relaying device with discrepant second relay protection of the measured value of protective relaying device described in other
It sets, then determining the secondary circuit of second protective relaying device, there are failures；
Wherein, the measured value includes the fundamental voltage amplitude of Startup time and/or surveyed busbar voltage of being triggered；
Wherein, if existing in the protective relaying device variant with the Startup time that is triggered of protective relaying device described in other
The second protective relaying device include:
If judging the Startup time t that is triggered of k-th of protective relaying devicekMeet following formula, then k-th of relay protection
Device is second protective relaying device:
Wherein, tiIt is triggered at the time of start for i-th of protective relaying device, M is the relay protection of starting of being triggered
The sum of device, Δ T=1/f, wherein f is sample frequency.
5. equipment according to claim 4, which is characterized in that the protective relaying device that is mutually related refers to:
The protective relaying device being respectively arranged on the different routes for coupling identical bus.
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| CN110109038B (en) * | 2019-04-19 | 2020-10-20 | 中国南方电网有限责任公司超高压输电公司南宁局 | Relay protection device measurement loop detection method and device |
| CN110082614A (en) * | 2019-04-19 | 2019-08-02 | 中国南方电网有限责任公司超高压输电公司南宁局 | A kind of abnormal intelligent monitoring method of relay protection secondary circuit |
| CN110956121A (en) * | 2019-11-27 | 2020-04-03 | 中国南方电网有限责任公司 | Hidden fault early warning method and device based on protection starting and associated recording analysis |
| CN112285464A (en) * | 2020-10-13 | 2021-01-29 | 国网安徽省电力有限公司 | Power grid fault diagnosis method and system |
| CN112345872A (en) * | 2020-12-04 | 2021-02-09 | 中国南方电网有限责任公司超高压输电公司昆明局 | Converter station secondary circuit abnormity identification and early warning method based on deep confidence network |
| CN113009265A (en) * | 2021-03-18 | 2021-06-22 | 国网山西省电力公司晋城供电公司 | Relay protection equipment inspection method and device, storage medium and electronic equipment |
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