CN104753042A - Method for detecting line protection without power failure through short-term output - Google Patents
Method for detecting line protection without power failure through short-term output Download PDFInfo
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- CN104753042A CN104753042A CN201510125148.2A CN201510125148A CN104753042A CN 104753042 A CN104753042 A CN 104753042A CN 201510125148 A CN201510125148 A CN 201510125148A CN 104753042 A CN104753042 A CN 104753042A
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Abstract
The invention discloses a method for detecting line protection without power failure through short-term output. The method for detecting the line protection without power failure through the short-term output mainly comprises the following steps that a line protection device and related loops are detected in operation states under the condition that a line is not in power failure; during the detection process, a function pressure plate, an input loop and an output loop of line protection can be normally connected, current and voltage are collected in real time, and line protection on two sides can achieve trip and close if a line area breaks down; the line protection device outputs in short time to respectively perform tests of A-phase trip, B-phase trip, C-phase trip and reclosing. The method for detecting the line protection without power failure through the short-term output achieves detection of the line protection device and the loops thereof under the condition that the line is not in power failure, greatly shortening the detection time and reduces the line power failure time.
Description
Technical field
The invention belongs to field of power, being related to electric power system inspection particularly and providing means, is the method for line protective devices and in-circuit testing thereof.
Background technology
After putting into operation in line protective devices and loop thereof, within its cycle in useful life, all to test, to guarantee that line protective devices and loop thereof can normally be run, find that there is damage or abnormal part, keep in repair in time.But more and more along with newly building a power station, the line protective devices of use get more and more, relaying protection personnel have been difficult to complete inspection task by the method for inspection in the past.
It is the condition of work tested in protection and loop thereof that protected equipment has a power failure.Protection and the inspection work in loop thereof, must do the more precautionary measures, until route protection and primary equipment need out of service after test again, every inspection and breaker tripping and closing test can be carried out.During inspection, need to exit all output clampings, open the current/voltage terminal etc. be connected with outside; Need to add with reference to analog quantity by terminal board, whether the sampling of detection line protector measuring is correct; Simulate all open into, throw move back function pressing plate, check line protective devices gather intake whether correct; Make the precision of each element movement, check the defencive function situation of line protective devices; Check power insert; Belt switch does breaker tripping and closing test, and inspection is tripped, whether closing circuit is correct; Check protection definite value, definite value district situation etc.Often need the Check-Out Time of several days.
At present, line protective devices are microcomputer type substantially.Microcomputer protecting device has the operating experience of more than 30 year, and networking previous crops a large amount of dynamic simulation tests, type approval test, has very high stability.Line protective devices are calculated by microprocessor, can according to opening of gathering into, function pressing plate state, analog quantity calculate, carry out breaker tripping and closing after satisfying condition, have very high reliability.Line protective devices open into, output, the links such as analog acquisition, vertical UNICOM road, operating voltage occurs abnormal, protection all can send out alarm signal.Line protective devices are to closing loop also real time monitoring, and noting abnormalities also can alarm.In protective device and associated loop thereof, before putting into operation for the first time, carried out detailed test to links, protective device function meets field requirement.Therefore, the protective device after putting into operation and the method for inspection of closing loop thereof can be optimized, and can check primarily of line protective devices self alarm in conjunction with breaker tripping and closing test again.
The present invention is by outputing the method for the inspection realizing line protective devices and loop thereof in short-term; meet do not have a power failure at circuit, on-load; inspection work can be completed within a short period of time, substantially reduce the number the service work time, decrease interruption duration simultaneously.
Summary of the invention
In order to reduce line protective devices and in-circuit testing thereof time, reduce interruption duration, the present invention proposes and a kind ofly not have a power failure the method for inspection route protection by outputing realization in short-term.
First the following technical term used in the present invention is described or is defined:
Open the situation needing to monitor external circuit into: line protective devices; jump position or co-bit as circuit breaker is in, whether the operating mechanism of circuit breaker has the low pressure state that is in, whether have the jumping signal far away etc. of female difference or failure protection; intake is the direct current signal that outside is input to the state for reacting said external loop of line protective devices, comprises intake signals such as jumping position, co-bit, low pressure locking, jumping far away.Line protective devices perform according to the situation of the intake of input and judge that circuit breaker is in jumping position or co-bit, whether has low pressure lock-reclosing lock signal, whether has jumping signal far away etc.
Function pressing plate: line protective devices determine whether more open protection components according to the throwing situation of moving back of function pressing plate, as dropped into longitudinal differential protection function, distance protection function, zero-sequenceprotection function, reclosing etc.
Analog quantity: refer to the electric current that line protective devices collect and voltage, comprises A phase current, B phase current, C phase current, zero-sequence current, A phase voltage, B phase voltage, C phase voltage, extracts voltage etc.The electric current collected and voltage are calculated, draws and the data that defencive function criterion needs comprise phase voltage, phase current, order components, impedance, Sudden Changing Rate etc.Extracting voltage is sentence the condition use same period when the reclosing function pressing plate dropping into triple mode, calibrating mode are set to checkout voltage or examine the same period.
Output: the order that line protective devices send, the amount of outputing comprises tripping operation, combined floodgate, alarm signal etc.
Reclosing charges: in reclosing logic, arrange a time timing element specially, realize charging/discharging function, avoid multiple shot reclosing.Do not having under barring condition, charging timing element full time of charging is 15s.Under the state that charging is full, when there being startup reclosing, and just allow after meeting reclosing condition to overlap.
Control box: control box is for arranging the subsidiary control loop of breaker operator, and the tripping operation of control operation circuit breaker, combined floodgate, monitor the situation such as jumping position, co-bit, air pressure of circuit breaker, and position, co-bit, tripping operation and combined floodgate situation are jumped in the display of control box indicator light.The depression signal of breaker operation mechanism is transferred to open to route protection and is received after this opens signal into, line protective devices by control box, discharges, no longer carry out reclosing after reclosing time delay 200ms.The A phase of line protective devices trips, B phase trips, C phase trips with reclosing output that normally opened contact trips with the A phase of control box respectively through respective output clamping, B phase trips, C phase trips and reclosure loop reform is connected; when above normally opened contact closes, the corresponding panel leds of control box is bright, send corresponding signal simultaneously.The jumping A phase of control box, jump B phase, jump C phase and closing circuit, then access the corresponding operating mechanism of circuit breaker respectively, realize breaker tripping and closing function.The signal access operation case such as jumping position, co-bit, air pressure of circuit breaker.
The present invention is concrete by the following technical solutions.
Not have a power failure the method for inspection route protection by outputing realization in short-term, it is characterized in that: circuit does not have a power failure, line protective devices and associated loop thereof are tested in running status; In checkout procedure, the function pressing plate of route protection, open into, output loop and still normally connect, Real-time Collection current/voltage, if break down in line areas, the route protection of both sides still can realize breaker tripping and closing action; Output order in short-term by line protective devices and realize the inspection under circuit not power-off condition of line protective devices and loop thereof.
A kind ofly not have a power failure the method for inspection route protection by outputing realization in short-term, line protective devices are provided with outputs trip signal in short-term, comprise and output A phase in short-term and trip, output B phase in short-term and trip and output C phase in short-term and trip, line protective devices output trip signal in short-term not by loading effects, send when outputing trip signal in short-term, trigger, store, print record ripple; It is characterized in that, said method comprising the steps of:
(1) under the state do not had a power failure at circuit, the jumping intake signal far away of the jumping position of line protective devices Real-time Collection circuit breaker, low pressure locking, female difference and failure protection;
(2) line protective devices Real-time Collection line simulation amount, comprises A phase current, B phase current, C phase current, zero-sequence current, A phase voltage, B phase voltage, C phase voltage, extracts voltage;
(3) line protective devices current alarm situation is checked, still alarm status is in if current, in conjunction with warning message analysis, electrical secondary system or protective device itself are overhauled, investigate out alarm cause, after confirming that line protective devices are current and there is no alarm, then enter step (4);
(4) check received intake signal by line protective devices, state moved back in the throwing of function pressing plate, the line simulation amount gathered, definite value district, definite value and reclosing charge condition, check the indicator light situation of control box, check circuit breaker situation, check that breaker tripping and closing output clamping is thrown and move back situation;
The intake signal confirming to be checked by line protective devices, function pressing plate drops into situation, whether line simulation amount conforms to actual conditions, confirms the definite value district checked and definite value with actual arrange whether conform to, whether reclosing charges expires; And whether co-bit indicator light is bright to confirm control box, the indicator light of tripping operation, position of closing a floodgate, jump does not work; And confirm whether circuit breaker charges full at co-bit, reclosing and do not have low pressure; And confirmation tripping operation output clamping, combined floodgate output clamping drop into; If there is any one incorrect, then corresponding intrument is overhauled, after meeting confirmation condition, enter step (5) again;
(5) manually A phase trip signal outputed in short-term by functional arrangement protective device, and the A phase trip signal that line protective devices send is connected to the operating mechanism of circuit breaker through control box; Circuit breaker A phase trips successfully, and line protective devices send out through the reclosing definite value time order that overlaps, and are connected to the closing circuit of the operating mechanism of circuit breaker through control box;
(6) indicator light is bright, " overlap outlet " indicator light is bright to judge whether line protective devices have " A phase trips "; Indicator light is bright, " overlap outlet " indicator light is bright to judge whether control box has " A phase trips "; Judge that circuit breaker A phase trips and reclosing whether success; If there is any one not meet, need to carry out investigation maintenance, after having overhauled, then the step of (5), (6) is re-started, until circuit breaker A phase trips, successful reclosing, and the display of each indicator light is correct, more than involution all indicator lights, after reclosing charging is full, then enter step (7);
(7) manually B phase trip signal outputed in short-term by functional arrangement protective device, and the jumping B order that line protective devices send is connected to the operating mechanism of circuit breaker through control box; Circuit breaker B phase trips successfully, and line protective devices send out through the reclosing definite value time order that overlaps, and are connected to the closing circuit of the operating mechanism of circuit breaker through control box;
(8) indicator light is bright, " overlap outlet " indicator light is bright to check whether line protective devices have " B phase trips "; Indicator light is bright, " overlap outlet " indicator light is bright to judge whether control box has " B phase trips "; Judge that circuit breaker B phase trips and reclosing whether success, if there is any one not meet, need to carry out investigation maintenance, after having overhauled, re-start the step of (7), (8), until circuit breaker B phase trips, reclosing success, and each indicator light display is correct, more than involution all indicator lights, after reclosing charging is full, then enter step (9);
(9) manually C phase trip signal outputed in short-term by functional arrangement protective device, the C phase trip signal that line protective devices send is connected to the operating mechanism of circuit breaker through control box, line protective devices send out through the reclosing definite value time order that overlaps, and are connected to the closing circuit of the operating mechanism of circuit breaker through control box;
(10) indicator light is bright, " overlap outlet " indicator light is bright to check whether line protective devices have " C phase trips "; Indicator light is bright, " overlap outlet " indicator light is bright to judge whether control box has " C phase trips "; Judge that circuit breaker C phase trips and reclosing whether success; If there is any one not meet, need to carry out investigation maintenance, after having overhauled, re-start the step of (9), (10), until circuit breaker C phase trips, reclosing success, and the display of each indicator light is correct, more than involution all indicator lights, after reclosing charging is full, then enter step (11);
(11) output A phase trip signal record ripple in printing step (5)-(10) in short-term to report, output B phase trip signal record ripple report in short-term and output the report of C phase trip signal record ripple in short-term, as this inspection record.
The method can carry out the inspection in route protection and loop thereof under not power-off condition, reduces Check-Out Time in a large number, decreases interruption duration.
Accompanying drawing explanation
Fig. 1 is the loop connection diagram of line protective devices;
Fig. 2 a kind ofly not to have a power failure the method flow diagram of inspection route protection by outputing realization in short-term.
Embodiment
Below in conjunction with Figure of description, technical scheme of the present invention is described in further details.
Fig. 1 is the loop connection diagram of line protective devices.
The A phase that line protective devices send trips, B phase trips, C phase trip signal; respectively by the A phase on protection screen trip output clamping, B phase trip output clamping, C phase trip output clamping access operation case corresponding A phase trips, B phase trips, the trip(ping) circuit of C phase, then go to jump the corresponding A phase of circuit breaker, B phase, C phase respectively.When the output clamping that trips is opened, though protective device send trip signal, protective device tripping operation indicator light bright, but the tripping operation indicator light of control box can not bright, circuit breaker can not trip.In normal course of operation, A phase trip output clamping and the C phase of output clamping, B phase that trip must be dropped into and to trip output clamping.
The coincidence order that line protective devices send, by the combined floodgate output clamping access operation case reclosure loop reform on protection screen, goes to close circuit breaker through closing circuit after heavily dynamic again.When combined floodgate output clamping is opened, though protective device send reclosing order, protective device coincidence exit lighting bright, but the coincidence exit lighting of control box can not bright, circuit breaker can not close a floodgate.In normal course of operation, combined floodgate output clamping must be dropped into.
The low pressure lock-reclosing lock of line protective devices is opened into from control box; It is generally direct from circuit breaker that A phase jumps position, B phase jumps position, C phase jumps position; Tripping far away enters from mother's difference and failure protection.
The signal such as jumping position, co-bit, air pressure of control box is from circuit breaker.Control box the depression signal of breaker operation mechanism is transferred to route protection open into.
The analog quantity of line protective devices is two sub-values, is obtained by current transformer, voltage transformer.
Output period in short-term, not latch-up protection function, if break down in line areas, the route protection of both sides still can realize breaker tripping and closing action, the impact of timely elimination accident.Protective device has communication three and jumps function, such as, output A phase in short-term and trip, if there is B phase fault in line areas simultaneously, the tripping operation of protection three-phase, sends that A phase trips, B phase trips, C phase trip signal; Output period in short-term, the jumping function far away of not latch-up protection device.After the tripping far away of receiving female difference and failure protection enters signal, locking originally stresses closing function, and this signal transfers to offside by vertical UNICOM road simultaneously, realizes transfer trip by offside route protection.
What line protective devices sent outputs in short-term, being driven, via outputing self-inspection loop, outputing by outputing plug-in unit by protection CPU, makes the approach sent consistent with the line protective devices tripping operation in actual motion.Protection sends out the Pulse Width Control of jumping order within the scope of 50 ~ 90ms.Make more than the jumping of 150ms, failure protection action, three phases un identical protection action may be caused, do not overlap.Output in short-term and should be greater than 50ms, ensureing also can reliable trip when control box tripping operation latching relay TBJ lost efficacy.Output in short-term and operate in line protective devices menu, other link can be reduced.For preventing misoperation in line protective devices normal course of operation, needing to arrange password, ensureing just to use this menu when checking.Line protective devices are outputed in short-term, not by the impact of loading condiction, can operate under not power-off condition.After single-hop, if unsuccessful reclosing, need, by three phases un identical protection action, to prevent long-term open-phase operation.
Figure 2 shows that and a kind ofly not have a power failure the method flow diagram of inspection route protection by outputing realization in short-term.The application comprises the following steps by outputing the do not have a power failure method of inspection route protection of realization in short-term:
Step 1: circuit does not have a power failure, line protective devices and associated loop thereof are tested in running status, can reduce grid switching operation, change the links such as test connection.The function pressing plate of route protection keeps originally dropping into state, open into, output loop and still normally connect.The jumping intake signal far away of the jumping position of Real-time Collection circuit breaker, low pressure locking, female difference and failure protection.
Step 2: Real-time Collection line simulation amount, comprises A phase current, B phase current, C phase current, zero-sequence current, A phase voltage, B phase voltage, C phase voltage, extracts voltage.Test under realizing the operating mode normally run on direct-on-line road.
Step 3: check line protective devices current alarm situation.Warning message comprises, PT broken string, CT broken string, jumping position abnormal, vertical connection channel failure, low-voltage lockout reclosing etc.Under normal circumstances, the correct sized phases of three-phase voltage is correct, not broken string, and protective device can not send the alarm of PT broken string; Three-phase current is normal, does not have secondary CT to break, and protective device can not send the alarm of CT broken string; When having electric current, illustrate that circuit breaker is in "on" position, do not have jump position open into, open into existence if having electric current and jump position simultaneously, protective device can send jumps position abnormality alarming; During vertical connection channel abnormal, not by vertical UNICOM road receiving and transmitting signal, protective device meeting alarm; When circuit breaker is in normal condition, protective device do not have low pressure lock-reclosing lock open into, otherwise protective device sends alarm.When sending out short trouble in line areas, protective device, by differentiating, sends breaker tripping and closing order after meeting operation condition, and eliminate the impact of system short-circuit fault, now protective device can not send alarm.During protective device alarm, alarm indicator is bright, has warning message to send simultaneously.If still be in alarm status current, press involution button, alarm indicator can be lighted after eliminating again, again sends out warning message, is that electrical secondary system or protective device itself break down, and then overhauls in conjunction with warning message analysis.After investigating out alarm cause, if press involution button, alarm indicator do not have bright, no longer send warning message; the run indicator of protective device is bright simultaneously; illustrate that protective device is normal condition, then carry out the operation of next step, prevented abnormality alarming and affected ensuing inspection work.
Step 4: check received intake situation into menu by opening of line protective devices, opening of display should conform to actual into situation.In normal course of operation, circuit breaker is in co-bit, and protective device should not have low pressure, A phase jumps position, B phase jumps position, C phase jumps position, tripping far away enters.Protective device does not gather co-bit signal, when not jumping a signal, is correspondingly separately judged to co-bit state;
Thrown by the function pressing plate menu look facility pressing plate of line protective devices and move back situation.Function pressing plate comprises longitudinal differential protection, distance protection, zero-sequenceprotection, reclosing etc.Before putting into operation, need drop into or exit correlation function pressing plate according to operation.Such as, when vertical channel abnormal, longitudinal differential protection can not work, and needs maintenance vertical UNICOM road, now needs to exit longitudinal differential protection function pressing plate temporarily.Reclosing function pressing plate comprises substance mode, triple mode, forbids mode and inactive mode, can only drop into the function pressing plate of wherein a kind of mode.When dropping into substance mode, allow to overlap during protection single-hop; When dropping into triple mode, allow to overlap when meeting test condition after trip protection; Exiting reclosing function when dropping into the mode of stopping using, not overlapping after trip protection; Exit reclosing function when input forbids mode, protection choosing is jumped and is not overlapped.The function pressing plate of protective device display is thrown and is moved back situation, should conform to actual requirement;
By the Circulating fibrocytes of line protective devices liquid crystal panel, check gathered line simulation amount situation, comprise A phase current, B phase current, C phase current, zero-sequence current, A phase voltage, B phase voltage, C phase voltage, extract voltage.The size of each analog quantity should be identical with the another set of line protective devices of this circuit, owing to not disconnecting secondary current pressure-wire, therefore can not check its phase condition;
The Circulating fibrocytes of the protective device liquid crystal panel definite value district of current use, should be consistent with the definite value district needed.Protective device is provided with 32 cover definite value districts, and Mei Tao definite value district all can input definite value, also can as definite value district for subsequent use, to meet different operational modes.Protective device needs to be input in the definite value district that specifies according to the fixed value list that issues before operation.Definite value district can switch, and has been switched to the definite value district of current use before protection puts into operation;
Checked when proparea definite value situation by the definite value menu of line protective devices, check definite value, should be consistent with actual fixed value list;
By the Circulating fibrocytes of line protective devices liquid crystal panel, check whether reclosing charges full.When do not jump position, low pressure locking, female difference and failure protection jumping intake signal far away time, it is full that reclosing should show charging;
After operation control box involution button, check that the co-bit indicator light of control box is bright, power supply indicator is bright, the indicator light of tripping operation, position of closing a floodgate, jump does not work, and now judges that control box is normal condition;
Check that circuit breaker is in co-bit and does not have depression signal;
On protection screen, confirmation tripping operation output clamping, combined floodgate output clamping drop into.
After all correct more than confirming, then enter next step.
Step 5: manually functional arrangement protective device output menu in short-term, input password after, output A phase trip signal in short-term, the A phase trip signal that line protective devices send is connected to the operating mechanism of circuit breaker through control box; Circuit breaker A phase trips successfully, and position state is jumped in access, protection have A phase jump position open into; line protective devices send out through the reclosing definite value time order that overlaps; be generally 1s, the A outputed in short-term before coincidence jumps trip signal and regains already, can not have influence on the coincidence of reclosing.The order that overlaps is connected to the closing circuit of the operating mechanism of circuit breaker through control box.
Step 6: line protective devices should have " A phase trips " indicator light is bright, " overlap outlet " indicator light is bright; Control box has " A phase trips " indicator light is bright, " overlap outlet " indicator light is bright; Circuit breaker answers that A phase trips successfully, reclosing success.If there is any one not meet, need to carry out investigation maintenance, after having overhauled, then re-start and output A phase in short-term and trip, until circuit breaker A phase trips, successful reclosing, and the display of each indicator light is correct, more than involution all indicator lights, after reclosing charging is full, the reclosing function after ensuing B phase trips could drop into.Confirm correctly, then enter next step.
Step 7: manually functional arrangement protective device output menu in short-term, input password after, output B phase trip signal in short-term, the B phase trip signal that line protective devices send is connected to the operating mechanism of circuit breaker through control box; Circuit breaker B phase trips successfully, and position state is jumped in access, protection have B phase jump position open into, line protective devices send out through the reclosing definite value time order that overlaps.The order that overlaps is connected to the closing circuit of the operating mechanism of circuit breaker through control box.
Step 8: line protective devices should have " B phase trips " indicator light is bright, " overlap outlet " indicator light is bright; Control box has " B phase trips " indicator light is bright, " overlap outlet " indicator light is bright; Circuit breaker answers that B phase trips successfully, reclosing success.If there is any one not meet, need to carry out investigation maintenance, after having overhauled, then re-start and output B phase in short-term and trip, until circuit breaker A phase trips, successful reclosing, and the display of each indicator light is correct, more than involution all indicator lights, after reclosing charging is full, the reclosing function after ensuing C phase trips could drop into.Confirm correctly, then enter next step.
Step 9: manually functional arrangement protective device output menu in short-term, input password after, output C phase trip signal in short-term, the C phase trip signal that line protective devices send is connected to the operating mechanism of circuit breaker through control box; Circuit breaker C phase trips successfully, and position state is jumped in access, protection have C phase jump position open into, line protective devices send out through the reclosing definite value time order that overlaps.The order that overlaps is connected to the closing circuit of the operating mechanism of circuit breaker through control box.
Step 10: line protective devices should have " C phase trips " indicator light is bright, " overlap outlet " indicator light is bright; Control box has " C phase trips " indicator light is bright, " overlap outlet " indicator light is bright; Circuit breaker answers that C phase trips successfully, reclosing success.If there is any one not meet, need to carry out investigation maintenance, after having overhauled, then re-start and output C phase in short-term and trip, until circuit breaker C phase trips, successful reclosing, and the display of each indicator light is correct, more than involution all indicator lights, after reclosing charging is full, circuit has recovered normal operating condition.Confirm correctly, then enter next step.
Step 11: send when outputing that A phase trips, B phase trips, C phase trips in short-term, can trigger protection record ripple, forms file and is stored in protective device, can print the report of record ripple.The report of record ripple comprises analog quantity, opens into state, function pressing plate state, outputs state, message etc.Print this output in short-term A phase trip signal record ripple report, in short-term output B phase trip signal record ripple report and output in short-term C phase trip signal record ripple report, as this inspection record.
After above step terminates, namely complete the inspection work under not power-off condition of route protection and closing loop thereof.Under normal circumstances, in the time just after outputing single-hop in short-term before coincidence, circuit breaker has tripping, because this reducing interruption duration.The present invention not to have a power failure the method for inspection route protection by outputing realization in short-term, examines route protection and relevant each loop, and achieve the inspection under not power-off condition, the method is simple and reliable, is easy to promote.
The embodiment more than provided is in order to illustrate the present invention and its practical application, not any pro forma restriction is done to the present invention, any one professional and technical personnel, not departing from the scope of technical solution of the present invention, does certain modification according to above techniques and methods and changes the Equivalent embodiments of working as and being considered as equivalent variations.
Claims (2)
1. not have a power failure the method for inspection route protection by outputing realization in short-term, it is characterized in that: circuit does not have a power failure, line protective devices and associated loop thereof are tested in running status; In checkout procedure, the function pressing plate of route protection, open into, output loop and still normally connect, Real-time Collection current/voltage, if break down in line areas, the route protection of both sides still can realize breaker tripping and closing action; Output order in short-term by line protective devices and realize the inspection under circuit not power-off condition of line protective devices and loop thereof.
2. one kind not to have a power failure the method for inspection route protection by outputing realization in short-term, line protective devices are provided with outputs trip signal in short-term, comprise and output A phase in short-term and trip, output B phase in short-term and trip and output C phase in short-term and trip, line protective devices output trip signal in short-term not by loading effects, send when outputing trip signal in short-term, trigger, store, print record ripple; It is characterized in that, said method comprising the steps of:
(1) under the state do not had a power failure at circuit, the jumping intake signal far away of the jumping position of line protective devices Real-time Collection circuit breaker, low pressure locking, female difference and failure protection;
(2) line protective devices Real-time Collection line simulation amount, comprises A phase current, B phase current, C phase current, zero-sequence current, A phase voltage, B phase voltage, C phase voltage, extracts voltage;
(3) line protective devices current alarm situation is checked, still alarm status is in if current, in conjunction with warning message analysis, electrical secondary system or protective device itself are overhauled, investigate out alarm cause, after confirming that line protective devices are current and there is no alarm, then enter step (4);
(4) check received intake signal by line protective devices, state moved back in the throwing of function pressing plate, the line simulation amount gathered, definite value district, definite value and reclosing charge condition, check the indicator light situation of control box, check circuit breaker situation, check that breaker tripping and closing output clamping is thrown and move back situation;
The intake signal confirming to be checked by line protective devices, function pressing plate drops into situation, whether line simulation amount conforms to actual conditions, confirms the definite value district checked and definite value with actual arrange whether conform to, whether reclosing charges expires; And whether co-bit indicator light is bright to confirm control box, the indicator light of tripping operation, position of closing a floodgate, jump does not work; And confirm whether circuit breaker charges full at co-bit, reclosing and do not have low pressure; And confirmation tripping operation output clamping, combined floodgate output clamping drop into; If there is any one incorrect, then corresponding intrument is overhauled, after meeting confirmation condition, enter step (5) again;
(5) manually A phase trip signal outputed in short-term by functional arrangement protective device, and the A phase trip signal that line protective devices send is connected to the operating mechanism of circuit breaker through control box; Circuit breaker A phase trips successfully, and line protective devices send out through the reclosing definite value time order that overlaps, and are connected to the closing circuit of the operating mechanism of circuit breaker through control box;
(6) indicator light is bright, " overlap outlet " indicator light is bright to judge whether line protective devices have " A phase trips "; Indicator light is bright, " overlap outlet " indicator light is bright to judge whether control box has " A phase trips "; Judge that circuit breaker A phase trips and reclosing whether success; If there is any one not meet, need to carry out investigation maintenance, after having overhauled, then the step of (5), (6) is re-started, until circuit breaker A phase trips, successful reclosing, and the display of each indicator light is correct, more than involution all indicator lights, after reclosing charging is full, then enter step (7);
(7) manually B phase trip signal outputed in short-term by functional arrangement protective device, and the jumping B order that line protective devices send is connected to the operating mechanism of circuit breaker through control box; Circuit breaker B phase trips successfully, and line protective devices send out through the reclosing definite value time order that overlaps, and are connected to the closing circuit of the operating mechanism of circuit breaker through control box;
(8) indicator light is bright, " overlap outlet " indicator light is bright to check whether line protective devices have " B phase trips "; Indicator light is bright, " overlap outlet " indicator light is bright to judge whether control box has " B phase trips "; Judge that circuit breaker B phase trips and reclosing whether success, if there is any one not meet, need to carry out investigation maintenance, after having overhauled, re-start the step of (7), (8), until circuit breaker B phase trips, reclosing success, and each indicator light display is correct, more than involution all indicator lights, after reclosing charging is full, then enter step (9);
(9) manually C phase trip signal outputed in short-term by functional arrangement protective device, the C phase trip signal that line protective devices send is connected to the operating mechanism of circuit breaker through control box, line protective devices send out through the reclosing definite value time order that overlaps, and are connected to the closing circuit of the operating mechanism of circuit breaker through control box;
(10) indicator light is bright, " overlap outlet " indicator light is bright to check whether line protective devices have " C phase trips "; Indicator light is bright, " overlap outlet " indicator light is bright to judge whether control box has " C phase trips "; Judge that circuit breaker C phase trips and reclosing whether success; If there is any one not meet, need to carry out investigation maintenance, after having overhauled, re-start the step of (9), (10), until circuit breaker C phase trips, reclosing success, and the display of each indicator light is correct, more than involution all indicator lights, after reclosing charging is full, then enter step (11);
(11) output A phase trip signal record ripple in printing step (5)-(10) in short-term to report, output B phase trip signal record ripple report in short-term and output the report of C phase trip signal record ripple in short-term, as this inspection record.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN107104414A (en) * | 2017-05-04 | 2017-08-29 | 中国南方电网有限责任公司 | A kind of relay protection maintenance aid decision-making method based on online data |
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| CN110554234B (en) * | 2019-09-03 | 2021-08-03 | 广东电网有限责任公司 | Zero-sequence current loop inspection method for in-service switch cabinet |
| CN114002530A (en) * | 2021-10-29 | 2022-02-01 | 广东电网有限责任公司 | Remote non-power-off scheduled inspection method and system for line protection device |
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