CN106950450A - 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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- CN106950450A CN106950450A CN201710254177.8A CN201710254177A CN106950450A CN 106950450 A CN106950450 A CN 106950450A CN 201710254177 A CN201710254177 A CN 201710254177A CN 106950450 A CN106950450 A CN 106950450A
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- protective relaying
- relaying device
- failure
- triggered
- secondary circuit
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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 invention provides a kind of method for early warning of protective relaying device secondary circuit failure and equipment, this method includes：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 start or unique startup that is not triggered the first protective relaying device, judge that the secondary circuit of first protective relaying device has failure；Otherwise, it is determined that in the absence of failure.By judging the protective relaying device in multiple associated protective relaying devices with the presence or absence of be uniquely triggered startup or unique startup that is not triggered; the steady state fault inside protective relaying device can not only be detected; and can effectively recognize the intermittent hidden failure of secondary circuit and send pre-warning signal; it is easy to exclude hidden danger in time, maintains the safe operation of power system.
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 technology
Secondary circuit is the electric loop that the work to primary equipment is monitored, controlled, measured, adjust and protected, should
Loop is by measuring instrumentss, relay, control and signal element, automatics, protective relaying device, electric current, voltage transformer etc.
It is formed by connecting by certain requirement.
Wherein, relay protection electric signal double measurement loop by the current/voltage transformer outside protective relaying device,
Signal transmitting device (voltage transmitter and current transducer), signal inside signal transmission wire, and protective relaying device are adjusted
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 is undergone mutation, 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, prior art is generally special using examination lamp, insulation resistance meter or universal meter etc.
Equipment is detected.Wherein traditional mode is that universal meter measures potentiometry, i.e., by using general-purpose table segmenting amount loop current potential,
It is otherwise open circuit if loop has positive and negative 110V current potentials over the ground can determine whether that loop is path.
But, the above method is only applicable to powered on the permanent fault in loop, i.e. loop or uncharged state.Relay
The early stage for protecting double measurement loop fault to occur, many failures are intermittences, and phenomenon of the failure is not serious, will not be immediately
Cause protective relaying maloperation, belong to implicity failure.These failures are difficult to be found by traditional detection means, but if letting alone not
Pipe, it is likely that can develop into catastrophe failure, cause electrical measurement gross error occur, is causing protective relaying device not just
Positive motion is made, and threatens the safe and stable operation of power system.
The content of the invention
For the defect that the ability detected present in prior art to the intermittent hidden failure of secondary circuit is poor,
The present invention provides the method for early warning and equipment of protective relaying device secondary circuit failure.
An aspect of of the present present invention provides the method for early warning of protective relaying device secondary circuit failure, including：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 startup or unique startup that is not triggered, then judge first protective relaying device
Secondary circuit there is failure；Otherwise, it is determined that in the absence of failure.
Wherein, after being judged to being not present failure in the step S2, methods described also includes：S3, according to the record ripple
File, if there is the discrepant second relay guarantor of measured value with protective relaying device other described in the protective relaying device
Protection unit, then judge that the secondary circuit of second protective relaying device has failure.
Wherein, the measured value includes be triggered Startup time and/or the fundamental voltage amplitude of surveyed busbar voltage.
Wherein, the protective relaying device that is mutually related in the step S1 refers to：Coupling the different circuits of identical bus
On the protective relaying device that is respectively arranged.
Wherein, if there is the quilt with protective relaying device other described in the protective relaying device in the step S3
Triggering discrepant second protective relaying device of Startup time includes：If judging being triggered for protective relaying device described in k-th
Startup time meets following formula, then k-th of protective relaying device is second protective relaying device：
Wherein, tiThe protective relaying device described in i-th be triggered startup at the time of, M be triggered startup it is described after
The sum of electrical protective device, wherein Δ T=1/f, f are sample frequency.
Wherein, if there is the institute with protective relaying device other described in the protective relaying device in the step S3
Surveying discrepant second protective relaying device of fundamental voltage amplitude of busbar voltage includes：If judging protective relaying device described in k-th
The fundamental voltage amplitude for surveying busbar voltage meet following formula, then k-th of protective relaying device be second relay protection dress
Put：
Wherein, UiThe protective relaying device described in i-th be triggered start after survey busbar voltage fundamental voltage amplitude, M
For the sum of the protective relaying device for the startup that is triggered, UNFor the rated voltage of bus, KresFor safety factor.
Another aspect of the present invention provides the source of early warning of protective relaying device secondary circuit failure, including：Acquisition module, is used
In the recorded wave file for obtaining multiple protective relaying devices that are mutually related；First warning module, for according to the recorded wave file,
If in the protective relaying device existence anduniquess be triggered start or unique startup that is not triggered the first protective relaying device,
Judge that the secondary circuit of first protective relaying device has failure；Otherwise, it is determined that in the absence of failure.
Wherein, the equipment also includes：Second warning module, when be determined as in first warning module be not present failure
Afterwards, for according to the recorded wave file, if there is the measurement with protective relaying device other described in the protective relaying device
It is worth discrepant second protective relaying device, then judges that the secondary circuit of second protective relaying device has failure.
Wherein, the measured value includes be triggered Startup time and/or the fundamental voltage amplitude of surveyed busbar voltage.
Wherein, the protective relaying device that is mutually related refers to：Cloth is distinguished on the different circuits for coupling identical bus
The protective relaying device put.
The method for early warning and equipment for the protective relaying device secondary circuit failure that the present invention is provided, by judging multiple correlations
With the presence or absence of the protective relaying device of be uniquely triggered startup or unique startup that is not triggered in the protective relaying device of connection, not only
The steady state fault inside protective relaying device can be detected, and can effectively recognize that the intermittent hidden failure of secondary circuit is concurrent
Go out pre-warning signal, be easy to exclude hidden danger in time, maintain the safe operation of power system.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can be with root
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 illustrates for the flow of the method for early warning of protective relaying device secondary circuit failure provided in an embodiment of the present invention
Figure；
The flow of the method for early warning for the protective relaying device secondary circuit failure that Fig. 2 provides for another embodiment of the present invention is shown
It is intended to；
The schematic diagram for the analog network that Fig. 3 provides for another embodiment of the present invention；
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.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is explicitly described, it is clear that described embodiment be the present invention
A part of embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
The every other embodiment obtained under the premise of creative work is made, the scope of protection of the invention is belonged to.
The embodiment of the present invention make use of the failure wave-recording file of microcomputer protecting device to recognize the intermittent hidden of secondary circuit
Containing failure.Wherein, secondary circuit can refer to transformation station protective relaying device double measurement loop, but the protection of the embodiment of the present invention
Scope not limited to this.
Relay protection can be triggered startup in situations below：(1) power system is broken down or disturbed, and causes voltage or electricity
Signal of stream is undergone mutation, and the signal sampling value of microcomputer protecting device is undergone mutation；(2) relay protection electric signal
Double measurement loop is broken down, and causes the signal sampling value of microcomputer protecting device to be undergone mutation.Come for microcomputer protecting device
Say, its starting algorithm can detect the mutation of signal, and starting protection algorithm.
For above-mentioned situation (1), if failure occurs in the protection domain of protective relaying device, device can send guarantor
Protect action signal；If failure or disturbance occur outside the protection domain of protective relaying device, protection device completes failure
Meeting involution, does not send action signal after processing routine.
For above-mentioned situation (2), if the failure of secondary circuit is more serious, protective relaying device may malfunction；But
In general, such as the initial stage of failure, because the failure not enough serious or duration of secondary circuit falls short of, then it will not make
Protective relaying device malfunction, but in this case there is still a need for diagnosis in time.
Compare the above-mentioned situation (1) for causing protection to start and (2).In above-mentioned situation (1), due to the correlation of electric signal
Property, the mutation of a certain electric signal can typically cause the mutation of its coherent signal simultaneously, and such as short trouble causes current signal to be dashed forward
So increase, while the bust of associated voltage signal can be caused.And in above-mentioned situation (2), due to the independence of secondary circuit, two
The mutation of signal sampling value caused by minor loop failure, will not make it that the sampled value of other related electric signals is also undergone mutation.
Using this difference, it can distinguish and cause the reason for relay protection starts.
Fig. 1 illustrates for the flow 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 includes：S1, obtains the recorded wave file of multiple protective relaying devices that are mutually related；S2, according to institute
State recorded wave file, if in the protective relaying device existence anduniquess be triggered start or unique startup that is not triggered the first relay
Protection device, then judge that the secondary circuit of first protective relaying device has failure and sends pre-warning signal；Otherwise, do not send out
Go out pre-warning signal.
In step sl, when the part being mutually related in multiple protective relaying devices is triggered startup, at its failure
After the completion of reason, the recorded wave file that each protective relaying device is generated respectively is read.Current relay protection largely uses Microcomputer Protection
Device is protected, and when power 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 startup of failure amount, before and after recording failure
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 can include multiple electrical quantity, such as voltage, electric current and power.
In step s 2, judged according to the step S1 recorded wave files obtained.If being mutually related multiple relay protections
Some device in device is triggered startup, and other devices be not triggered startup when, then show the circuit of power system
Do not break down, and simply the secondary circuit of the device of the startup that is triggered there occurs failure, just cause unique relay
Protection device starts protection.It therefore, it can send pre-warning signal.
The startup if some device in multiple protective relaying devices that is mutually related is not triggered, and other devices are touched
Hair starts, then shows that the circuit of power system there occurs failure, and the device for not being triggered startup does not have starting protection to be then
Because the secondary circuit of the device there occurs failure, its not actuated protection is just caused.Accordingly it is also possible to send pre-warning signal.
When unique startup or unique the first not actuated protective relaying device are not present in multiple protective relaying devices, then sentence
Disconnected be not present contains faulty secondary circuit, does not send pre-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 startup or unique startup that is not triggered in the protective relaying device of connection, not only
The steady state fault inside protective relaying device can be detected, and can effectively recognize that the intermittent hidden failure of secondary circuit is concurrent
Go out pre-warning signal, be easy to exclude hidden danger in time, maintain the safe operation of power system.
Based on above-described embodiment, after being judged to being not present failure in the step S2, methods described also includes：S3, root
According to the recorded wave file, if in the presence of discrepant with the measured value of protective relaying device other described in the protective relaying device
Second protective relaying device, then judge that the secondary circuit of second protective relaying device has failure.
Start or the first relay of unique startup that is not triggered is protected if judging not to be triggered uniquely in step S2
Protection unit, then do not send pre-warning signal in S2, then the method that embodiment is provided can be opened being triggered according to recorded wave file
Dynamic protective relaying device is determined whether.
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 normally；If the difference of the measured value of a certain protective relaying device and other devices is larger, show the dress
The secondary circuit put may have occurred failure, can send pre-warning signal.By to the specific of multiple association protective relaying devices
Measured value of the same race between be compared, can accurately judge the implicity failure of each secondary circuit.
Based on above-described embodiment, wherein, the measured value includes be triggered Startup time and/or the base of surveyed busbar voltage
Wave amplitude.Specifically, the Startup time that is triggered of protective relaying device can be selected as specific measured value, can also be selected
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
Put and be compared.If wherein some device and other devices differ greatly, it may determine that the secondary circuit of the device is present
Implicity failure, sends pre-warning signal.Wherein it is possible to one in above-mentioned two particular measurement value is selected as decision content,
Can be by two simultaneous selections.
Based on above-described embodiment, wherein, the protective relaying device that is mutually related in the step S1 refers to：It is identical coupling
The protective relaying device being respectively arranged on the different circuits of bus.Specifically, it can arrange and not gone the same way on the same bus of transformer station
The protective relaying device installed on line associated apparatus each other, the contrast of many associated apparatus can effectively suppress external fault or disturbance
Interference.
Based on above-described embodiment, wherein, if exist in the protective relaying device in the step S3 with described in other
Discrepant second protective relaying device of the Startup time that is triggered of protective relaying device includes：If judging relay described in k-th
The Startup time that is triggered of protection device meets following formula, then k-th of protective relaying device fills for second relay protection
Put：
Wherein, tiThe protective relaying device described in i-th be triggered startup at the time of, M be triggered startup it is described after
The sum of electrical protective device, wherein Δ T=1/f, f are sample frequency.
Specifically, if the Startup time that is triggered of one 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, there is implicity event in the secondary circuit of the device
Barrier, sends pre-warning signal.Be triggered the difference of Startup time by the device that is mutually related, and effectively have detected relay protection dress
Put internal intermittent transient fault.
Based on above-described embodiment, wherein, if exist in the protective relaying device in the step S3 with described in other
Discrepant second protective relaying device of the fundamental voltage amplitude for surveying busbar voltage of protective relaying device includes：If judging k-th
The fundamental voltage amplitude for surveying 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, UiThe protective relaying device described in i-th be triggered start after survey busbar voltage fundamental voltage amplitude, M
For the sum of the protective relaying device for the startup that is triggered, UNFor the rated voltage of bus, KresFor safety factor, reliable system
Several spans is 0.05~0.1.
Specifically, if the fundamental voltage amplitude for surveying busbar voltage of one in multiple protective relaying devices meets above-mentioned public affairs
Formula, then show the fundamental voltage amplitude for surveying busbar voltage of the device and the fundamental voltage amplitude difference for surveying busbar voltage of other devices
It is larger, there is implicity failure in the secondary circuit of the device, send pre-warning signal.The base of voltage as measured by each device
Wave amplitude carrys out the steady-state behaviour in detection means internal measurement loop.
Method in order to further illustrate above-described embodiment offer, the secondary returning that Fig. 2 provides for another embodiment of the present invention
The schematic flow sheet of the method for road fault pre-alarming, the schematic diagram for the analog network that Fig. 3 provides for another embodiment of the present invention.
As shown in figure 3, building model using Matlab/Simulink, experiment is simulated.The network is by a mother of confluxing
F is abort situation in the circuit composition that line and four are connected with bus, figure, and R1~R4 is protective relaying device.
In first is illustrated, implicity failure is not present in R1~R4 measuring loop, sets three-phase ground short at F
Road failure, carries out emulation testing.As shown in Fig. 2 comprising the following steps that：
Step 1：Arrangement R1~R4 is the protective relaying device associated each other；
Step 2：At the 1000ms moment, failure is set.R1~R4 is respectively in 1001ms, 1001ms, 1002ms and 1001ms quilt
Triggering starts.After the completion of its troubleshooting, its failure wave-recording file is read；
Step 3：R1~R4 is triggered startup, does not send pre-warning signal；
Step 4：Compare R1~R4 and be triggered and whether there is difference at the time of startup, there is t1=1001ms, t2=
1001ms、t3=1002ms and t4=1001ms, wherein sample frequency f are 2000 hertz.According to previously described formula (1), to t1~t4Point
Do not calculated, be unsatisfactory for formula (1), do not send pre-warning signal；
Step 5：Compare R1~R4 be triggered start after the fundamental voltage amplitude of measured voltage whether there is difference, there is U1
=0.232, U2=0.246, U3=0.249 and U4=0.253 (being perunit value).According to previously described formula (2), to U1~U4Enter respectively
Row is calculated, and is unsatisfactory for formula (2), is not sent pre-warning signal.
Do not send pre-warning signal in above diagnosis algorithm, judge that implicity event is not present in R1~R4 measuring loop
Barrier, this diagnostic result is consistent with default.
In second is illustrated, one implicity failure is set in R4 measuring loop, three-phase ground short circuit is set at F
Failure, carries out emulation testing.Set implicity failure is short-circuited for voltage transmitter output in this example, the voltage obtained
Transmitter result is zeroed out, but the protection domain not limited to this of the embodiment of the present invention.As shown in Fig. 2 comprising the following steps that：
Step 1：Arrangement R1~R4 is the protective relaying device associated each other；
Step 2：At the 1000ms moment, failure is set.R1~R4 is respectively in 1001ms, 1001ms, 1002ms and 1001ms quilt
Triggering starts.After the completion of its troubleshooting, its failure wave-recording file is read；
Step 3：R1~R4 is triggered startup, does not send pre-warning signal；
Step 4：Compare R1~R4 and be triggered and whether there is difference at the time of startup, there is t1=1001ms, t2=
1001ms、t3=1002ms and t4=1001ms, wherein sample frequency f are 2000 hertz.According to previously described formula (1), to t1~t4Point
Do not calculated, be unsatisfactory for previously described formula (1), do not send pre-warning signal；
Step 5：Compare R1~R4 be triggered start after the fundamental voltage amplitude of measured voltage whether there is difference, there is U1
=0.232, U2=0.246, U3=0.249 and U4=0.012kV (is perunit value), according to previously described formula (2), to U1~U4Respectively
Calculated, wherein having
Previously described formula (2) is met, judges that R4 measuring loop has implicity failure, sends pre-warning signal.Diagnosis is walked above
Be present implicity failure in the rapid measuring loop for judging R4, be consistent with default.Therefore, above-mentioned two citing can illustrate the present invention
The method that embodiment is provided can realize the early warning to the implicity failure of secondary circuit.It should be noted that the example above is provided
Method the step of and order only for explanation above-described embodiment, the protection domain not limited to this of the present embodiment.
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：Acquisition module 401, the record ripple for obtaining multiple protective relaying devices that are mutually related
File；First warning module 402, for according to the recorded wave file, if existence anduniquess is triggered in the protective relaying device
Startup or the first protective relaying device of unique startup that is not triggered, then judge the secondary circuit of first protective relaying device
There is failure；Otherwise, it is determined that in the absence of failure.
Specifically, it is complete in its troubleshooting when the part being mutually related in multiple protective relaying devices is triggered startup
Cheng Hou, acquisition module 401 reads the recorded wave file that each protective relaying device is generated respectively.Current relay protection is largely using micro-
Machine protection device is protected, and when power system is broken down or is disturbed, microcomputer protecting device starts and carries out failure wave-recording.
Specifically, the recorded wave file that the first warning module 402 is obtained according to acquisition module 401 is judged.If mutually closing
Some device in multiple protective relaying devices of connection is triggered startups, and other devices are not triggered when starting, then table
The circuit of bright power system does not break down, and simply the secondary circuit of the device of the startup that is triggered there occurs failure,
Cause unique protective relaying device and start protection.Therefore, the first warning module 402 can send pre-warning signal.
The startup if some device in multiple protective relaying devices that is mutually related is not triggered, and other devices are touched
Hair starts, then shows that the circuit of power system there occurs failure, and the device for not being triggered startup does not have starting protection to be then
Because the secondary circuit of the device there occurs failure, its not actuated protection is just caused.Therefore, the first warning module 402 also may be used
To send pre-warning signal.
When unique startup or unique the first not actuated 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 send pre-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 startup or unique startup that is not triggered in the protective relaying device of connection, not only
The steady state fault inside protective relaying device can be detected, and can effectively recognize that the intermittent hidden failure of secondary circuit is concurrent
Go out pre-warning signal, be easy to exclude hidden danger in time, maintain the safe operation of power system.
Based on above-described embodiment, the equipment also includes：Second warning module, sentences when in first warning module 402
It is set in the absence of after failure, for according to the recorded wave file, if existing and relay other described in the protective relaying device
Discrepant second protective relaying device of measured value of protection device, then judge the secondary circuit of second protective relaying device
There is failure.
Specifically, if there is no uniquely be triggered startup or unique startup that is not triggered in the first warning module 402
Protective relaying device, then the second warning module traveling one can be entered to the protective relaying device for the startup that is triggered according to recorded wave file
Step judges.
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
To be normal；If the difference of the measured value of a certain protective relaying device and other devices is larger, show the secondary circuit of the device
Failure is may have occurred, the second warning module can send pre-warning signal.By to the specific of multiple association protective relaying devices
Measured value of the same race between be compared, can accurately judge the implicity failure of each secondary circuit.
Based on above-described embodiment, wherein, the measured value includes be triggered Startup time and/or the base of surveyed busbar voltage
Wave amplitude.Specifically, the second warning module can select 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 the 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
To judge that the secondary circuit of the device has implicity failure, pre-warning signal is further sent out.Wherein it is possible to select above-mentioned two
One in particular measurement value, can also be by two simultaneous selections as decision content.
Based on above-described embodiment, wherein, the protective relaying device that is mutually related refers to：Coupling identical bus not
With the protective relaying device being respectively arranged on circuit.
The method for early warning and equipment for the protective relaying device secondary circuit failure that the present invention is provided, by judging multiple correlations
With the presence or absence of the protective relaying device of be uniquely triggered startup or unique startup that is not triggered in the protective relaying device of connection, not only
The steady state fault inside protective relaying device can be detected, and can effectively recognize that the intermittent hidden failure of secondary circuit is concurrent
Go out pre-warning signal, be easy to exclude hidden danger in time, maintain the safe operation of power system.
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
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or to which part technical characteristic progress equivalent；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. a kind of method for early warning of protective relaying device secondary circuit failure, it is characterised in that including：
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 startup or be not triggered uniquely
The first protective relaying device started, then judge that the secondary circuit of first protective relaying device has failure；Otherwise, it is determined that
For in the absence of failure.
2. according to the method described in claim 1, it is characterised in that after being judged to being not present failure in the step S2, institute
Stating method also includes：
S3, according to the recorded wave file, if there is the measurement with protective relaying device other described in the protective relaying device
It is worth discrepant second protective relaying device, then judges that the secondary circuit of second protective relaying device has failure.
3. method according to claim 2, it is characterised in that the measured value includes be triggered Startup time and/or institute
Survey the fundamental voltage amplitude of busbar voltage.
4. according to the method described in claim 1, it is characterised in that 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 circuits for coupling identical bus.
5. method according to claim 3, it is characterised in that if being deposited in the protective relaying device in the step S3
Include with discrepant second protective relaying device of the Startup time that is triggered of protective relaying device other described：
If judging, the Startup time that is triggered of protective relaying device described in k-th meets following formula, k-th of relay protection dress
It is set to second protective relaying device：
Wherein, tiThe protective relaying device described in i-th be triggered startup at the time of, M is the relay protection of startup of being triggered
The sum of device, wherein Δ T=1/f, f are sample frequency.
6. method according to claim 3, it is characterised in that if being deposited in the protective relaying device in the step S3
Include with discrepant second protective relaying device of the fundamental voltage amplitude for surveying busbar voltage of protective relaying device other described：
If judging, the fundamental voltage amplitude for surveying busbar voltage of protective relaying device described in k-th meets following formula, described k-th after
Electrical protective device is second protective relaying device：
Wherein, UiThe protective relaying device described in i-th be triggered start after survey busbar voltage fundamental voltage amplitude, M be touched
Send out the sum of the protective relaying device started, UNFor the rated voltage of bus, KresFor safety factor.
7. a kind of source of early warning of protective relaying device secondary circuit failure, it is characterised in that including：
Acquisition module, the recorded wave file for obtaining multiple protective relaying devices that are mutually related；
First warning module, for according to the recorded wave file, if existence anduniquess is triggered startup in the protective relaying device
Or the first protective relaying device of unique startup that is not triggered, then judge that the secondary circuit of first protective relaying device is present
Failure；Otherwise, it is determined that in the absence of failure.
8. equipment according to claim 7, it is characterised in that also include：
Second warning module, after being judged to being not present failure in first warning module, for according to the recorded wave file,
If having discrepant second relay protection of measured value with protective relaying device other described in the protective relaying device to fill
Put, then judge that the secondary circuit of second protective relaying device has failure.
9. equipment according to claim 8, it is characterised in that the measured value includes be triggered Startup time and/or institute
Survey the fundamental voltage amplitude of busbar voltage.
10. the equipment according to claim 7 or 9, it is characterised in that the protective relaying device that is mutually related refers to：
The protective relaying device being respectively arranged on the different circuits for coupling identical bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254177.8A CN106950450B (en) | 2017-04-18 | 2017-04-18 | The method for early warning and equipment of protective relaying device secondary circuit failure |
Applications Claiming Priority (1)
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| 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 |
| CN110109038A (en) * | 2019-04-19 | 2019-08-09 | 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 protective relaying device measurement return circuit detection method and device |
| 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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| 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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