CN101726704A - Fault replaying method based on micro-processor based protective relay device - Google Patents
Fault replaying method based on micro-processor based protective relay device Download PDFInfo
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- CN101726704A CN101726704A CN200910200815A CN200910200815A CN101726704A CN 101726704 A CN101726704 A CN 101726704A CN 200910200815 A CN200910200815 A CN 200910200815A CN 200910200815 A CN200910200815 A CN 200910200815A CN 101726704 A CN101726704 A CN 101726704A
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Abstract
The invention discloses a fault replaying method based on a micro-processor based protective relay device, relating to the technical field of electromechanical fault replay. The invention aims to solve the technical problems of high cost, insecurity and limitation by software and hardware in the fault replay. The method comprises the following steps: 1) satisfying the requirement of fault wave recording function; 2) adding a human-computer interface for starting fault replay on the LCD interface of a relay protector; 3) adopting sampling switching technology comprising a replay initialization process, a replay proceeding process and a replay restoring process; 4) stabilizing signal prolongation and signal montage technology; 5) receiving external wave recording data for replaying faults by the device in the mode of serial port or Ethernet communication. The invention has the characteristics of low cost and simple and safe operation, can repeatedly carry out multiple replays, can replay complex faults and is not limited by software and hardware platforms.
Description
Technical field
The present invention relates to functional failure of electromechanical recurrence technology, particularly relate to a kind of technology of the fault recurrence method based on microcomputer protective relay device.
Background technology
The fault that takes place in the electric system all has a property crossed, and does not promptly have identical fault 2 times, also can not utilize the hundred-percent reproduction primary fault of existing technological means.Though along with the modern digital advancement of simulation technology; utilize high-precision numeral record wave device and reaying protection test instrument; analog quantity (secondary side current that mainly refers to the secondary side voltage and current mutual inductor of voltage transformer (VT)) in the time of can be with fault and digital quantity (deciliter state that mainly refers to isolating switch) reduction; and check the course of action of protective relaying device whether correct with this, but there is following limitation in this method:
At first, the scene of protective relaying device is installed high-precision numeral record wave device must be installed, this is for being difficult to often accomplish in 35KV and the following electric system.And will reappear fault at fault in-situ the reaying protection test instrument with wave shape playback function also must be provided, this needs no small human and material resources of cost and time for the supply station that is in remote districts.
Secondly, the primary fault of electric system tends to cause a series of continuous action of protective relaying device.For example; the once nonvolatil short trouble of transmission line of electricity; protective relaying device can trip because of excess current; reclosing action then owing to be nonvolatil short trouble, have short-circuit current again and produces behind the reclosing; therefore action of the after accelerated protection of protective relaying device and tripping operation; then secondary reclosing action, and then tripping operation, whole process need continues several seconds to tens seconds.But, numeral record wave device does not generally possess jumbo high-speed memory based on cost consideration, and this just means that its record ripple time can not be very long, can only keep the time in several seconds at most, therefore numeral record wave device can't complex failure process of complete documentation.
Once more; adopt the mode of numeral record wave device and reaying protection test instrument to carry out the fault recurrence; actual fault-signal is to amplify through the sampling of numeral record wave device and the signal of reaying protection test instrument; and then enter protective relaying device; directly enter protective relaying device with fault-signal and how compared 2 links, therefore inevitably can cause distorted signals.That is to say that adopt this mode to carry out fault and recur, its fault-signal that restores is compared with the physical fault signal of protective relaying device collection, is impossible hundred-percent identical.Like this when fault-signal is in the border of protection actuating range; when if the action behavior of protective relaying device and the behavior of presetting are inconsistent; just can't determine it is the reason of signal acquiring system of protective relaying device, or the reason of the protection action logic of device.
Summary of the invention
At the defective that exists in the above-mentioned prior art; technical matters to be solved by this invention provides cheaply a kind of; can repeatedly recur repeatedly; simple to operate, safe; can recur complex fault, not be subjected to fault recurrence method based on microcomputer protective relay device soft, the hardware platform restriction.
In order to solve the problems of the technologies described above, a kind of fault recurrence method based on microcomputer protective relay device provided by the present invention is characterized in that the step of method comprises:
1) satisfy the requirement of failure wave-recording function:
A) make the data layout of failure wave-recording meet the standard of IEC 60255-24:2001;
B) only need before the record trouble and the several cycles (voltage of electric system, current signal all are cyclical variation, and we claim that the waveform of one-period is a cycle usually) after the fault get final product;
C) except the record trouble signal, also to write down protective relaying device in the running status of the moment that failure wave-recording starts, comprise the variate-value of important data pointer, protection logic element etc.;
2) increase the man-machine interface that starts the fault recurrence on the liquid crystal interface of protective relaying device, it acts on mainly is need to select fault of recurring and the setting of carrying out necessity.
3) sampling handoff technique comprises following three parts composition:
A) recur initialization procedure, replace normal operation mode by the recurrence pattern, comprise by the collection of the pattern of recurrence control data and interrupting, the sampling period is set, and the running status that pen recorder is current is reduced into the state that failure wave-recording starts moment with the running status of installing;
B) recur the process of carrying out, the data of gathering when replacing device normally to move with the fault recorder data of appointment are carried out the relay protection logic determines.
C) recur rejuvenation, after recurrence finishes,, comprise the recovery of sampled data buffer zone, the recovery in sampling period, the recovery of device running status from recurring recovering state to normal operating condition;
4) steady-state signal continuation and signal splicing: in whole palingenetic process, the discontinuous recorder data of multistage is spliced into once intactly fault data;
5) device can be accepted the external recorder data that meets IEC 60255-24:2001 standard and carry out the fault recurrence in the mode of serial ports or ethernet communication.
Further, at described step 1) B) in, the conditional request that starts the record ripple is sensitive and diversified; Utilize the sudden change amount of voltage, electric current to start the record ripple to realize the sensitivity of record ripple; When deciliter state of the isolating switch of electric system or disconnecting link changes, start the record ripple, to realize the variation of record ripple.
Further, in described step 2) in, can on liquid crystal interface, be arranged on and forbid when fault is recurred or allow the protective relaying device operating breaker.
Further, at described step 3) B) in, in carrying out the fault palingenetic process, use software running device, breakpoint to be set, obtain the result of the relay protection logic determines of this section in any time of recurring, whether correct with check relay protection logic.
Further, in described step 4), the signal splicing is: because each data collection point of recorder data all has markers, therefore when with the steady-state signal continuation to the starting point of next section recorder data during the moment, call in next section recorder data automatically.
Further, in described step 4), steady-state signal continuation technology: just can keep stable state after the fault as long as the data of last cycle are recurred repeatedly.
The beneficial effect of the fault recurrence method based on microcomputer protective relay device provided by the invention:
1) need not to increase extra equipment, utilize protective relaying device self just can realize fault recurrence function;
2) also can carry out the fault recurrence for lasting long complex fault;
3) owing to the recorder data that is used for the fault recurrence is exactly that device oneself is gathered, therefore can repeatedly recur repeatedly for primary fault, and each fault data that protective relaying device collects when recurring the fault data that uses all with physical fault is hundred-percent identical;
4) simple to operate, safety just can be finished on the liquid crystal interface of protective relaying device;
5) this method is used the microcomputer based relay protective device that all have the failure wave-recording function, to soft, hardware require lowly, be not subjected to restriction soft, hardware platform.
Embodiment
Below embodiments of the invention are described in further detail, but present embodiment is not limited to the present invention, every employing similarity method of the present invention and similar variation thereof all should be listed protection scope of the present invention in.
A kind of fault recurrence method based on microcomputer protective relay device that the embodiment of the invention provided is characterized in that the step of fault recurrence method comprises:
1) carrying out the prerequisite that fault recurs is the function that failure wave-recording must just be arranged; this all possesses for present microcomputer type relay protection basically; but in order to reduce the fault generation running status of protective relaying device constantly as much as possible, the failure wave-recording function of requirement must satisfy following requirement:
A) data layout of failure wave-recording should meet the standard of IEC 60255-24:2001, this standard is the unified standard that is provided with for failure wave-recording in the world, meet the versatility that this standard not only helps data, the more important thing is, it stipulates that each data collection point all should have markers, and this provides prerequisite for the following waveform concatenation that will mention.
B) because the inner limited storage space of device, so the time of every section record ripple does not need oversize, only need before the record trouble and the several cycles after the fault (voltage of electric system, current signal all are cyclical variation, usually we claim that the waveform of one-period is a cycle) get final product, but the condition that require to start the record ripple wants sensitive and diversified, guarantees that electric system state variation each time can both note effective waveform.For solving the sensitivity problem, utilize the sudden change amount of voltage, electric current to start the record ripple; And the variation of record ripple condition is meant even without fault, when deciliter state of the isolating switch of electric system or disconnecting link changes, also will start the record ripple, so just can guarantee the action successfully and so on of similar reclosing, and waveform recording can both be arranged.
C) in order to reduce the fault generation running status of protective relaying device constantly as much as possible; except the record trouble signal; also to write down protective relaying device in the running status of the moment that failure wave-recording starts, comprise the variate-value of important data pointer, protection logic element etc.
2) increase the man-machine interface that starts the fault recurrence on the liquid crystal interface of protective relaying device, it acts on mainly is need to select fault of recurring and the setting of carrying out necessity.For example, can on liquid crystal interface, be arranged on when fault is recurred whether forbid the protective relaying device operating breaker, its objective is: generally speaking,, forbid the protective relaying device operating breaker of just recurring in fault for security consideration; But when the testing ground lacks the reaying protection test instrument; whether the gear train of testing isolating switch under failure condition again is normal; at this moment just can utilize the protective relaying device of recurring in fault to come operating breaker (because device can detect fault when recurring; thereby send trip command with drive transmission device), whether normal with the gear train of checking isolating switch.
3) sampling handoff technique.Fault recorder data has been arranged and started the man-machine interface that fault is recurred; just can start primary fault recurs; but must there be a kind of technology to make protective relaying device enter into the recurrence state from normal running status; after recurring end, can claim this technology to be the sampling handoff technique from recurring recovering state again to normal operating condition.This technology is made up of following three parts:
A) recur initialization procedure.After this process is meant and receives the recurrence instruction, replace normal operation mode by the recurrence pattern, comprise by the collection of the pattern of recurrence control data and interrupting, the sampling period is set, the running status that pen recorder is current is reduced into the state that failure wave-recording starts moment with the running status of installing;
B) recur the process of carrying out.The data of gathering when this process is meant and replaces device normally to move with the fault recorder data of appointment are carried out the relay protection logic determines.In addition, in carrying out the fault palingenetic process, use software running device, can breakpoint be set, obtain the result of the relay protection logic determines of this section in any time of recurring, whether correct with check relay protection logic.For lasting long complex fault, this process also needs steady-state signal continuation and signal splicing to guarantee the integrality of failure process.
C) recur rejuvenation.After this process is meant and recurs end,, comprise the recovery of sampled data buffer zone, the recovery in sampling period, the recovery of device running status from recurring recovering state to normal operating condition.
4) steady-state signal continuation and signal splicing.For lasting long complex fault; protective relaying device record be the electric system recorder data during state variation each time; therefore in whole palingenetic process; the discontinuous recorder data of multistage must be spliced into once intactly fault data, claim that this technology is steady-state signal continuation and signal splicing.The foundation of steady-state signal continuation is that the transient state process of electric power system fault generally all has only 3 to 8 cycles, therefore as long as cycle is greater than 8 after the fault of every section record ripple record, we just can think that the data of last cycle that every section record ripple writes down have been the steady state datas after the fault, and the stable state of electric system all has the characteristic that periodically repeats, therefore just can keep stable state after the fault, steady-state signal continuation technology that Here it is as long as the data of last cycle are recurred repeatedly.Each data collection point of above having mentioned recorder data all has markers, therefore when with the steady-state signal continuation to the starting point of next section recorder data during the moment, call in next section recorder data automatically, so just finished the splicing of signal.
5) device can be in the mode of serial ports or ethernet communication; accept the external recorder data that meets IEC 60255-24:2001 standard and carry out the fault recurrence; but owing to lack the running status of protective relaying device in the moment that failure wave-recording starts; therefore it is different when the action behavior of protective relaying device may be with physical fault; the moment that mainly shows relay action may have the error of Millisecond etc., but this error does not influence the accuracy of check relay protection logic in most cases.
Claims (6)
1. fault recurrence method based on microcomputer protective relay device is characterized in that the step of method comprises:
1) satisfy the requirement of failure wave-recording function:
A) make the data layout of failure wave-recording meet the standard of IEC 60255-24:2001;
B) only need before the record trouble and the several cycles (voltage of electric system, current signal all are cyclical variation, and we claim that the waveform of one-period is a cycle usually) after the fault get final product;
C) except the record trouble signal, also to write down protective relaying device in the running status of the moment that failure wave-recording starts, comprise the variate-value of important data pointer, protection logic element etc.;
2) increase the man-machine interface that starts the fault recurrence on the liquid crystal interface of protective relaying device, it acts on mainly is need to select fault of recurring and the setting of carrying out necessity;
3) sampling handoff technique comprises following three parts composition:
A) recur initialization procedure, replace normal operation mode by the recurrence pattern, comprise by the collection of the pattern of recurrence control data and interrupting, the sampling period is set, and the running status that pen recorder is current is reduced into the state that failure wave-recording starts moment with the running status of installing;
B) recur the process of carrying out, the data of gathering when replacing device normally to move with the fault recorder data of appointment are carried out the relay protection logic determines;
C) recur rejuvenation, after recurrence finishes,, comprise the recovery of sampled data buffer zone, the recovery in sampling period, the recovery of device running status from recurring recovering state to normal operating condition;
4) steady-state signal continuation and signal splicing: in whole palingenetic process, the discontinuous recorder data of multistage is spliced into once intactly fault data;
5) device can be accepted the external recorder data that meets IEC 60255-24:2001 standard and carry out the fault recurrence in the mode of serial ports or ethernet communication.
2. the fault recurrence method based on microcomputer protective relay device according to claim 1 is characterized in that, at described step 1) B) in, the conditional request that starts the record ripple is sensitive and diversified; Utilize the sudden change amount of voltage, electric current to start the record ripple to realize the sensitivity of record ripple; When deciliter state of the isolating switch of electric system or disconnecting link changes, start the record ripple, to realize the variation of record ripple.
3. the fault recurrence method based on microcomputer protective relay device according to claim 1 is characterized in that, in described step 2) in, can on liquid crystal interface, be arranged on and forbid when fault is recurred or allow the protective relaying device operating breaker.
4. the fault recurrence method based on microcomputer protective relay device according to claim 1; it is characterized in that; at described step 3) B) in; in carrying out the fault palingenetic process; use software running device; breakpoint to be set in any time of recurring, obtain the result of the relay protection logic determines of this section, whether correct with check relay protection logic.
5. the fault recurrence method based on microcomputer protective relay device according to claim 1; it is characterized in that; in described step 4); the signal splicing is: because each data collection point of recorder data all has markers; therefore when with the steady-state signal continuation to the starting point of next section recorder data during the moment, call in next section recorder data automatically.
6. the fault recurrence method based on microcomputer protective relay device according to claim 1 is characterized in that, in described step 4), and steady-state signal continuation technology: just can keep stable state after the fault as long as the data of last cycle are recurred repeatedly.
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| CN200910200815A CN101726704A (en) | 2009-12-25 | 2009-12-25 | Fault replaying method based on micro-processor based protective relay device |
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| CN200910200815A CN101726704A (en) | 2009-12-25 | 2009-12-25 | Fault replaying method based on micro-processor based protective relay device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168784A (en) * | 2016-08-31 | 2016-11-30 | 许继集团有限公司 | A kind of protective relaying device operation is changed processing method and controls device |
| CN111596165A (en) * | 2020-04-13 | 2020-08-28 | 上海紫通信息科技有限公司 | Power distribution network fault simulation method based on steady-state transient smooth splicing output |
| CN113391156A (en) * | 2021-06-23 | 2021-09-14 | 四川华能宝兴河水电有限责任公司 | Power system fault reproduction method |
-
2009
- 2009-12-25 CN CN200910200815A patent/CN101726704A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168784A (en) * | 2016-08-31 | 2016-11-30 | 许继集团有限公司 | A kind of protective relaying device operation is changed processing method and controls device |
| CN111596165A (en) * | 2020-04-13 | 2020-08-28 | 上海紫通信息科技有限公司 | Power distribution network fault simulation method based on steady-state transient smooth splicing output |
| CN113391156A (en) * | 2021-06-23 | 2021-09-14 | 四川华能宝兴河水电有限责任公司 | Power system fault reproduction method |
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Application publication date: 20100609 |