CN1430318A - Power distibution circuit fault location and isolation method and device - Google Patents
Power distibution circuit fault location and isolation method and device Download PDFInfo
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- CN1430318A CN1430318A CN 01138660 CN01138660A CN1430318A CN 1430318 A CN1430318 A CN 1430318A CN 01138660 CN01138660 CN 01138660 CN 01138660 A CN01138660 A CN 01138660A CN 1430318 A CN1430318 A CN 1430318A
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Abstract
A method and apparatus for locating and isoalting the failure in distributing circuit is disclosed. Said apparatus is used in conjunction with vacuum switch, power supply, and failure segment indicator to form a core unit of an automatic distributing network system. The said method can quickly locate and automatically isolate the failure region for increasing reliability of power supply by distribution system.
Description
One, affiliated technical field
The present invention relates to the method and the device of a kind of distribution line failure detection and location and isolation, belong to controller switching equipment
Technical field.
Two, background technology
The electrical network of China is followed the architecture of the former Soviet Union substantially, generally 66KV and following electrical voltage system is called power distribution network.Along with the development of urban distribution network and the continuous expansion of power distribution network scale, the fault of power distribution network frequently takes place, and power distribution network extends to each corner, network-intensive, and branch is many, causes trouble shoot, gets rid of difficulty greatly, and the economic loss that causes thus is huge.China scientific research personnel is on the distribution line failure localization method at present, some researchs have also been carried out, as " method that distribution network failure is positioned " (application number: 99124621), " a kind of distribution network failure detection method and detection system " (application number: 95117577) etc., these technology have all proposed the localization method to distribution network failure, but these methods only position fault, and not with as far as possible little the isolating in line fault zone, thereby the economic loss that barrier is for some reason caused is still bigger.
Three, summary of the invention
The objective of the invention is to, a kind of new distribution network failure, the method and the relevant apparatus of isolating the location are provided, this device and segmentation distribution pvs (pole-mounted vacuum switch) (PVC), supply unit (SPS), and distribution network failure section indicating device (FSI) be used in combination, form the core component of distribution automation system jointly.When distribution line broke down, this method can be isolated faulty section simultaneously automatically apace to fault location, the whole piece distribution line is restored electricity rapidly, thereby improve the reliability of distribution system power supply effectively, guarantee the quality of power supply, dwindle the power failure scope, reduce loss of outage.
Method of the present invention may further comprise the steps:
(1) Data Detection is to obtain the voltage signal at controlled switch two ends on the circuit: the secondary voltage signal of gathering voltage transformer (PT) supply unit of controlled switch both sides on the distribution line, ac voltage signal with 0～230V of collecting, by the A/D module, convert corresponding digital signal to, and be input to and go in the single-chip microcomputer to handle;
(2) according to the voltage digital signal of above-mentioned gained, judge whether to break down: by the calculation procedure in the single-chip microcomputer, above-mentioned gained voltage digital signal is carried out computing, convert the virtual voltage volume on the distribution line to, this magnitude of voltage carries out necessary storage and uploads management on the one hand as the online in real time measured value of line voltage distribution; On the other hand as the standard input signal of the control program in the single-chip microcomputer, be used to judge whether circuit breaks down, if detecting voltage is the normal voltage value of distribution line, the circuit fault-free, then repeat above step, if detect voltage is zero, and then line failure will carry out fault location and isolation;
(3) according to the fault judgement result, carry out fault location and isolation: the working method of segmentation looped network distribution system is radial pattern and looped network type at present, the inventive method is also corresponding when carrying out fault location to have two kinds of working methods, the one, the control mode of waypoint, the 2nd, the control mode of looped network contact point:
1. waypoint control mode
Circuit breaks down and causes the outlet circuit breaker trip, each controlled switch is separating brake in succession also, when the outlet circuit breaker carries out reclosing, each section apparatus of the present invention begins to start in succession the fault judgement process on the circuit, whether each device is only judged controlled switch two-termial line fault separately, and is generated corresponding handling procedure, the action of control controlled switch, this process is carried out at the incoming call and back these two the different periods of energising of closing a floodgate according to controlled switch, and process is:
A) the incoming call period: after controlled switching power supply is brought in electricity, promptly carrying out the X-time judges, realization is also finished the whether judgement of incoming call end line fault, judge through the X-time, normal as circuit, then, connect controlled switch combined floodgate circuit, drive controlled switch and carry out closing operation by the output of the control program in single-chip microcomputer switching signal; Then export block signal if any fault, carry out X-time locking (oppositely locking, promptly with this caller in the opposite direction) handle, when once more from reverse incoming call, system judges no longer and the processing of closing a floodgate that up to lock release, the basis for estimation of line fault is:
It is zero more than 3.5 seconds that the voltage digital signal of I controlled switch incoming call side continues;
The instantaneous voltage digital signal of II controlled switch either side continues 30% of the above rated voltage greater than distribution line of 150 microseconds;
III controlled switch both sides collect voltage digital signal simultaneously;
B) close a floodgate the back energising period: controlled switch promptly carries out the Y-time and judges after closing a floodgate, and realizes and finishes the whether judgement of controlled switch load end line fault, judges through the Y-time, and is normal as circuit, then whole judgement control procedure end; Then export block signal if any fault by the control program in the single-chip microcomputer, carry out Y-time locking (forward locking, promptly with this caller to identical direction) handle, when once more when forward is sent a telegram here, system is no longer judged and the processing of closing a floodgate, up to lock release, the basis for estimation of line fault is that the voltage digital signal of controlled switch load-side continues is zero more than 3.5 seconds;
2. looped network contact point control mode
The controlled switch of looped network contact point is in gate-dividing state when circuit is normal, the either side circuit breaks down when the contact point, cause this circuit outlet circuit breaker trip and when cutting off the power supply, apparatus of the present invention begin to start the fault judgement process, generate corresponding handling procedure, these two different periods of energising carry out the action of control controlled switch, this process reach combined floodgate according to controlled switch before combined floodgate after, and process is:
A) close a floodgate before the period: when the arbitrary end of controlled switch (looped network interconnection switch) breaks down and when cutting off the power supply, beginning to carry out the XL-time delays judges, judge through the XL-time delays, normal as circuit, then by the output of the control program in single-chip microcomputer switching signal, connect controlled switch combined floodgate circuit, drive controlled switch and carry out closing operation; Then export block signal if any fault, carry out XL-time locking and handle, controlled switch can not be closed, and the basis for estimation of line fault is:
The instantaneous voltage digital signal of I controlled switch either side continues 30% of the above rated voltage greater than distribution line of 150 microseconds;
II controlled switch both sides collect voltage digital signal simultaneously;
B) close a floodgate the back energising period: controlled switch promptly carries out the Y-time and judges after closing a floodgate, and judges through the Y-time, and is normal as circuit, and then whole judgement control procedure finishes; , carry out Y-time locking and handle then by the control program in single-chip microcomputer output block signal if any fault, controlled switch can not be closed, and the basis for estimation of line fault is that the voltage digital signal of controlled switch load-side continues is zero more than 3.5 seconds.
A kind of distribution line failure location and spacer assembly is characterized in that this device comprises:
(1) measurement mechanism 1, voltage sampling apparatus 11 is gathered the voltage that distribution line is divided into each switch ends in each interval, the voltage signal that sampling apparatus is collected converts corresponding digital signal to through amplifier 12 and A/D conversion equipment 13, and is input to and goes in the single-chip microcomputer to handle;
(2) judgment means 2, and the voltage signal of gathering is analyzed and handled, and handle according to controlled switch incoming call, each period corresponding judgment of energising back of closing a floodgate, and judge whether distribution line breaks down;
(3) input/output device 3, and parameter setting, manual release, state show and according to judged result, generate the signal that is used for the control switch operation and break down after locking handle;
(4) power circuit and reference voltage device 4 are made up of many groups voltage stabilizing circuit, offer needed various working powers of instrument and reference voltage power supply.
Described judgment means 2 is characterised in that and comprises:
(1) single-chip microcomputer 21, it is system's central controller, and storage failure monitoring Control Software program, the voltage of this software collection controlled switch two-termial line, according to of the detection of different periods, judge whether distribution line breaks down, according to judged result to voltage, combined floodgate, forward and reverse locking of control controlled switch, and record trouble direction and fault period;
(2) outer extension memory 22, various Control Parameter, setup parameter, measurement data, operation result, judgement Status Flag and various operational factor and data that storage system is required;
(3) time-setting mechanism 23, by many groups button and decipher circuit accordingly and form, set the operating time parameter of instrument.
Described judgment means 2 is characterised in that and comprises watchdog circuit 24, and it is made up of standard module and circuit, guarantees the startup of instrument operation, synchronously and prevent that software program from running and fly.
Described input/output device 3 is characterised in that and comprises I/O control device 31, it comprises the input button, the parameter that can manually set and manual release, and can be according to the data processed result of single-chip microcomputer, send output signal, the closure and the block action of controlled switch on the control post.
Described input/output device 3 is characterised in that and comprises LED indicating device 32, is made up of multi-group light-emitting diode and driver circuit thereof, is used to refer to the various operating states of instrument.
Described distribution line failure location and spacer assembly is characterized in that it is installed on each segmentation distribution pillar, with the supporting use of vacuum switch, also can be installed on occasion such as change of user's distribution and city ring main unit on outdoor box change, the box change of looped network, the post.
Four, description of drawings and embodiment
Further specify the present invention below in conjunction with drawings and Examples, embodiments of the invention are to control realization by the softwares such as program that embed.
Fig. 1 is radial pattern distribution net work structure figure in the embodiment of the invention 1;
Fig. 2 is looped network type distribution net work structure figure in the embodiment of the invention 2;
Fig. 3 is a structured flowchart of the present invention;
Fig. 4 is a monitor system software control module structured flowchart;
Fig. 5 is a monitoring software system flow block diagram of the present invention.
At present the working method of segmentation looped network distribution system is radial pattern and looped network type, and the present invention is also corresponding when carrying out fault location to have two kinds of working methods, the one, the control mode of waypoint, the 2nd, a control mode of looped network contact point.According to the fault opening time of present distribution system 0.2 second, 3.5 seconds reclosing time, determine power end fault judgement of the present invention in an embodiment, be to be that (principle of setting is that the X-time of apparatus of the present invention that each node disposed on the whole piece power distribution network is judged for the integral multiple of 7 seconds or 7 seconds the X-time, successively by 7 seconds, 14 seconds, 21 seconds, the order timesharing carry out), the load end fault judgement, be to judge that length is 5 seconds the Y-time, the XL-time delays is the integral multiple (maximum quantity that institute comprises controlled switch in each branch line that connects according to the looped network contact point are determined) of 7 seconds or 7 seconds, and the time judgement of each apparatus of the present invention is carried out successively.
As shown in Figure 1, the leading-out terminal of circuit disposes reclosing switch CB1 on the post, and it is than reclosing switch CB highly sensitive in the station, when breaking down on the circuit, carries out reclosing operation to fault judgement by CB1.The backbone of circuit is divided into 3 sections by segmentation controlled switch S3, S5 on the post, and its sector number is respectively F1, F4, F6, and three branch lines of circuit carry out segmentation by segmentation controlled switch S1, S2, S4 on the post respectively, and its sector number is respectively F2, F3, F5.Segmentation controlled switch S1, S2, S3, supporting respectively apparatus of the present invention R1, R2, R3, R4, the R5 of being equipped with of S4, S5 on the post, wherein S1, S2, S3 are connected on the node of a power distribution network, S4, S5 are connected on the node of another power distribution network, because it is fashionable in reclosing switch CB1 reclosing to be connected a controlled switch on the node, to send a telegram here simultaneously, for guaranteeing that these 5 switches are by the judgement of closing a floodgate successively of 7 seconds the time interval.Therefore the X-time of R1, R2, R3 is set to 7 seconds, 14 seconds, 21 seconds respectively, and the X-time of R4, R5 is set to 7 seconds, 14 seconds, and after the Y-time of all apparatus of the present invention all judged in the X-time, length was set to 5 seconds.
As shown in Figure 1, if permanent fault appears in branch line F3 section, system will control by following step:
1. when branch line F3 section broke down, CB1 carried out separating brake, and 5 block switches are because of the while dead electricity, whole separating brakes, the whole line outages after the CB1.
2. when CB1 carried out reclosing after 3.5 seconds, switch S 1, S2, the forward of S3 is sent a telegram here simultaneously, apparatus of the present invention R1 that it is corresponding supporting, R2, R3 begins to carry out the power end fault judgement, be to judge the X-time, because S1, S2, the X-time of S3 is set at 7 seconds respectively, 14 seconds, 21 seconds, therefore R1 at first judges, secondary voltage signal according to the voltage transformer supply unit on the distribution line of checkout gear collection, convert corresponding digital signal to, and carry out computing by the calculation procedure in the single-chip microcomputer, convert the virtual voltage volume on the distribution line to,, in 7 seconds, judge according to the fault judgement rule, after 7 seconds, detection does not have fault to take place, the output switching signal, and the control switch S1 that control links with it closes a floodgate.
3. after S1 closed a floodgate, R1 began to carry out the load end fault judgement, and promptly the Y-time is judged, after 5 seconds, detecting does not have fault to take place, and S1 closes a floodgate successfully; Because X-time of R2 was judged as 14 seconds, begin to carry out when the Y-time judges at R1, R2 begins to carry out the X-time and judges, deterministic process is identical with R1, judges in 7 seconds, after 14 seconds, judge that fault-free takes place, the output switching signal, the control switch S2 that control links with it closes a floodgate.
4. after S2 closed a floodgate, R2 began to carry out the load end fault judgement, and promptly the Y-time is judged, because the fault point, causes CB1 separating brake for the second time in the F3 section, and all fronts dead electricity, the S2 failure of closing a floodgate, its supporting apparatus of the present invention R2 carries out Y-time locking, i.e. forward locking to S2.Simultaneously, to have indicated the position of faulty section be F3 to the fault detector in standing.
5. after CB1 carries out the secondary reclosing, although the forward of S1, S2, S3 incoming call simultaneously again, because S2 has carried out the forward locking, no longer judge, only R1, the R3 that controls S1, S3 carried out the X-time and judge that S1 closes a floodgate successfully after 7 seconds, S3 closes a floodgate successfully after 21 seconds.Because the forward locking effect of S2 has cut off the power supply to the F3 section.
6. after S3 closes a floodgate successfully, the forward of S4, S5 is sent a telegram here simultaneously, its corresponding supporting apparatus of the present invention R4, R5 also begins to carry out the X-time simultaneously and judges that the process X-time judges and the Y-time is judged, S4 closes a floodgate successfully after 7 seconds, and S5 closes a floodgate successfully after 14 seconds.
7. fault judgement and control procedure are finished.F1, F2, F4, F5, F6 section are recovered normal power supply on the distribution line, and only the F3 section is isolated.
As shown in Figure 2, the leading-out terminal of 211,237 two feeder lines disposes reclosing switch CB1 and CB2 on the post respectively, carries out reclosing operation to fault judgement separately by them.They are than reclosing switch highly sensitive in the station, when breaking down on the circuit, carry out reclosing operation to fault judgement by CB1, CB2.The backbone of 211 feeder lines is divided into 3 sections by segmentation controlled switch S11, S12 on the post, and its sector number is respectively F11, F12, F13, and branch line carries out segmentation by segmentation controlled switch S13, and its sector number is F14; The backbone of 237 feeder lines by segmentation controlled switch S21, S22 on the post, be divided into 3 sections, its sector number is respectively F21, F22, F23; Article two, the looped network interconnection switch of feeder line is served as by controlled switch S0 on the post.Segmentation controlled switch S11, S12, S13, S21, S22 difference supporting apparatus of the present invention R11, R12, R13, R21, R22 on the post, its X-time is set to 7 seconds, 14 seconds, 21 seconds, 7 seconds, 14 seconds respectively, the Y-time judge judge in the X-time after, length all is set to 5 seconds.Because it is 3 that controlled switch S0 both sides, contact point feeder line accepts to control the maximum quantity of switch, fully whole fault judgement and isolate at most and need 28 seconds, therefore, the XL-time delays of controlling apparatus of the present invention R0 of S0 is 28 seconds, judgement time is similarly 7 seconds.
As shown in Figure 2, if permanent fault appears in the F12 section on the backbone of 211 feeder lines, system will control by following step:
1. when backbone F12 section broke down, because outlet circuit breaker sensitivity in the CB1 ratio station, CB1 carried out separating brake, and 3 block switch S11, S12 on 211 feeder lines, S13 are because of the also whole separating brakes of while dead electricity.CB1 is to the whole line outages between the looped network interconnection switch S0, but do not influence the power supply of 237 feeder lines.
2. behind the CB1 separating brake, looped network interconnection switch S0 is because of an end decompression, and its supporting apparatus of the present invention R0 begins to carry out the XL-time delays and judges.
3. CB1 carried out reclosing after 3.5 seconds, the forward incoming call of block switch S11, and its supporting apparatus of the present invention R11 also begins to carry out the X-time simultaneously and judges, and concrete deterministic process is with identical described in the embodiment 1, and S11 closes a floodgate after 7 seconds.
4. after S11 closes a floodgate, R11 begins to carry out the Y-time and judges, meanwhile, S12 also judges because of the forward incoming call begins to carry out the X-time, because the fault point at the F12 section, causes CB1 secondary separating brake, 211 feeder lines are dead electricity completely, S11 carries out Y-time locking (forward locking), and S12 carries out X-time locking (oppositely locking), and transformer station's internal fault indicating device also indicates fault and occurs in the F12 section.
5. after 3.5 seconds, CB1 carries out overlapping the second time, and S11 is owing to by the forward locking, therefore cut off power supply backward, and CB1 closes a floodgate successfully.
6. looped network interconnection switch S0 is in the XL-time, closes a floodgate after delaying time in promptly 28 seconds, powers to the F13 section.Send a telegram here simultaneously in the rear end of switch S 13, S12, because S12 has been reversed locking, its supporting apparatus of the present invention R12 no longer judges, and partition power supply forward, the supporting apparatus of the present invention R13 of S13 carries out the X-time and judges, and same R0 carries out the Y-time and judges, S13 closes a floodgate after 7 seconds, judge through the Y-time, close a floodgate successfully, be the power supply of F14 section.
7. fault judgement and control procedure are finished.Except that the F12 fault section was effectively isolated, all the other each section F11, F13, F14 section all recovered normal power supply on 211 feeder lines.
In looped network segmentation electrical power distribution automatization system, if the reason of fault is a circuit broken string, and on any phase circuit that connects at PT that breaks, or two-phase all breaks, and then apparatus of the present invention of faulty section rear end are adopted less than voltage signal, can't carry out the judgement of reverse locking.Like this, when looped network interconnection switch combined floodgate is oppositely powered, will cause the separating brake and the reclosing operation of looped network other end reclosing switch, oppositely judge once by same process.Finally faulty section effectively can be isolated equally, recover the normal power supply in fault-free district.And whole judgement recovery process all can be controlled within 1 fen clock time.
Fig. 3 is a structured flowchart of the present invention, as shown in the figure, the invention belongs to an intelligent Detection ﹠ Controling instrument in the distribution network automated technical applications, it adopts the microcontroller (single-chip microcomputer) of high reliability is core, the full electronic operation principle, directly AC sampling is all measured, is judged and controls blocking function and realize by software.Wherein:
1, measurement mechanism 1, comprising:
1) voltage sampling apparatus 11: the secondary voltage signal of directly gathering the voltage transformer pt supply unit on the distribution line;
2) amplifier 12: ac voltage signal is amplified, so that handle;
2) the A/D conversion equipment 13: the A/D analog-to-digital conversion module by special use is formed, and the voltage signal that it collects sampling apparatus converts corresponding digital signal to and is input to and goes in the single-chip microcomputer to handle.
2, judgment means 2, comprising:
1) single-chip microcomputer 21: be the central processing unit of whole instrument, realize detection, judgement, the controlled function of instrument by software.
2) outer extension memory 22: be the outer extension memory of single-chip microprocessor system, be used for storage data.
3) time-setting mechanism 23: by many groups button and decipher circuit accordingly and form, be used for setting the operating time parameter of instrument.
4) watchdog circuit 24: be made up of standard module and circuit, be used for guaranteeing the startup of instrument operation, synchronously and prevent that software program from running and multinomial function such as fly.
3, input/output device 3, comprising:
1) the I/O control device 31: comprise the input button, and the parameter that can manually set and manual release, and can send output signal by it according to the data processed result of single-chip microcomputer, realize control lock operation function to controlled on-pole switch.
2) the LED indicating device 32: be made up of multi-group light-emitting diode and driver circuit thereof, be used to refer to the various operating states of instrument.
4, power circuit and reference voltage device 4: form by many groups voltage stabilizing circuit, offer needed various working powers of instrument and reference voltage power supply.
Fig. 4 is a monitor system software control module structured flowchart.As shown, the monitor system software control module comprises following 7 modules:
1, Control Parameter setting module:, set parameters such as time required in the software control process, operation according to the state that apparatus of the present invention are moved;
2, key scan module: the input button in the output/output-controlling device is scanned artificial parameter of setting of response and manual release operation;
3, the caller is to judge module: judge the caller to, thereby determine whether to carry out locking;
4, data acquisition and processing module: controlled switch both sides line voltage distribution data are gathered and calculation process in real time, as the input data of judge module;
5, fault timesharing judge module: according to ad hoc rules, to the data after handling judge determine whether controlled switch both sides circuit breaks down, and generate control signals such as combined floodgate or locking that it is divided into following three submodules:
(1) the X-time is judged and lock modules: whether caller's circuit is broken down judge, if circuit is normal, and the output switching signal; If circuit breaks down, export reverse block signal;
(2) the Y-time is judged and lock modules: whether load side's circuit is broken down judge,, close a floodgate successfully if circuit is normal, if circuit breaks down, and output forward block signal;
(3) manual release processing module: response manual release operation, remove forward and reverse block signal;
6, controlled switch switch-on controlling module: according to the switching signal of fault judgement module output, the controlled switch on the control post is carried out corresponding operation;
7, data processing and failure logging: the processing of the various Control Parameter of system, service data, Status Flag and the record of fault signature.
Fig. 5 is a monitoring software system flow block diagram of the present invention.As shown, the flow process that the present invention monitors with the software executive program is, voltage to the controlled switch both sides is sampled, when the data of gathering just often, apparatus of the present invention will continue to gather and data processing, when the data of gathering are improper, after outage overlapped, system initialization at first detected working method and Control Parameter, determine that the residing working method of apparatus of the present invention is waypoint mode or looped network contact point mode, and definite X-time, Control Parameter such as XL-time are then to sending electric direction to differentiate and confirming whether then check has the blocking sign, if the locking sign is arranged, reexamine whether be satisfy the caller to locking, if for satisfy the caller to locking, system is no longer judged, to only carry out data acquisition and processing, wait for the reclosing after cutting off the power supply; If do not have locking sign or locking sign and caller to different, then carry out the fault judgement program.The end fault judgement of at first sending a telegram here, promptly X-time diagnostic process when the diagnosis incoming call brings out existing fault, is then controlled apparatus of the present invention and is exported reverse block signal, sets up also record blocking sign; When diagnosis incoming call end fault-free, then export switching signal, the control controlled switch carries out closing operation, carry out the load end fault judgement simultaneously, i.e. Y-time diagnostic process is when diagnostic load brings out existing fault, then control apparatus of the present invention output forward block signal, set up also record blocking sign, when diagnostic load end fault-free, then make apparatus of the present invention continue to gather the controlled switch both sides voltage data line data of going forward side by side and handle.For controlled switch through X-locking and Y-locking, before manual release, will keep corresponding blocking always, perhaps after power down process, just can press said process again and carry out.
Claims (7)
1, a kind of distribution line failure location and partition method is characterized in that this method comprises following each step:
(1) Data Detection is to obtain the voltage signal at controlled switch two ends on the circuit: the secondary voltage signal of gathering voltage transformer (PT) supply unit of controlled switch both sides on the distribution line, ac voltage signal with 0～230V of collecting, by the A/D module, convert corresponding digital signal to, and be input to and go in the single-chip microcomputer to handle;
(2) according to the voltage digital signal of above-mentioned gained, judge whether to break down: by the calculation procedure in the single-chip microcomputer, above-mentioned gained voltage digital signal is carried out computing, convert the virtual voltage volume on the distribution line to, this magnitude of voltage carries out necessary storage and uploads management on the one hand as the online in real time measured value of line voltage distribution; On the other hand as the standard input signal of the control program in the single-chip microcomputer, be used to judge whether circuit breaks down, if detecting voltage is the normal voltage value of distribution line, the circuit fault-free, then repeat above step, if detect voltage is zero, and then line failure will carry out fault location and isolation;
(3) according to the fault judgement result, carry out fault location and isolation: the working method of segmentation looped network distribution system is radial pattern and looped network type at present, the inventive method is also corresponding when carrying out fault location to have two kinds of working methods, the one, the control mode of waypoint, the 2nd, the control mode of looped network contact point:
1. waypoint control mode
Circuit breaks down and causes the outlet circuit breaker trip, each controlled switch is separating brake in succession also, when the outlet circuit breaker carries out reclosing, each section apparatus of the present invention begins to start in succession the fault judgement process on the circuit, whether each device is only judged controlled switch two-termial line fault separately, and is generated corresponding handling procedure, the action of control controlled switch, this process is carried out at the incoming call and back these two the different periods of energising of closing a floodgate according to controlled switch, and process is:
A) the incoming call period: after controlled switching power supply is brought in electricity, promptly carrying out the X-time judges, realization is also finished the whether judgement of incoming call end line fault, judge through the X-time, normal as circuit, then, connect controlled switch combined floodgate circuit, drive controlled switch and carry out closing operation by the output of the control program in single-chip microcomputer switching signal; Then export block signal if any fault, carry out X-time locking (oppositely locking, promptly with this caller in the opposite direction) handle, when once more from reverse incoming call, system judges no longer and the processing of closing a floodgate that up to lock release, the basis for estimation of line fault is:
It is zero more than 3.5 seconds that the voltage digital signal of I controlled switch incoming call side continues;
The instantaneous voltage digital signal of II controlled switch either side continues 30% of the above rated voltage greater than distribution line of 150 microseconds;
III controlled switch both sides collect voltage digital signal simultaneously;
B) close a floodgate the back energising period: controlled switch promptly carries out the Y-time and judges after closing a floodgate, and realizes and finishes the whether judgement of controlled switch load end line fault, judges through the Y-time, and is normal as circuit, then whole judgement control procedure end; Then export block signal if any fault by the control program in the single-chip microcomputer, carry out Y-time locking (forward locking, promptly with this caller to identical direction) handle, when once more when forward is sent a telegram here, system is no longer judged and the processing of closing a floodgate, up to lock release, the basis for estimation of line fault is that the voltage digital signal of controlled switch load-side continues is zero more than 3.5 seconds;
2. looped network contact point control mode
The controlled switch of looped network contact point is in gate-dividing state when circuit is normal, when communication center either side circuit breaks down, cause this circuit outlet circuit breaker trip and when cutting off the power supply, apparatus of the present invention begin to start the fault judgement process, generate corresponding handling procedure, these two different periods of energising carry out the action of control controlled switch, this process reach combined floodgate according to controlled switch before combined floodgate after, and process is:
A) close a floodgate before the period: when the arbitrary end of controlled switch (looped network interconnection switch) breaks down and when cutting off the power supply, beginning to carry out the XL-time delays judges, judge through the XL-time delays, normal as circuit, then by the output of the control program in single-chip microcomputer switching signal, connect controlled switch combined floodgate circuit, drive controlled switch and carry out closing operation; Then export block signal if any fault, carry out XL-time locking and handle, controlled switch can not be closed, and the basis for estimation of line fault is:
The instantaneous voltage digital signal of I controlled switch either side continues 30% of the above rated voltage greater than distribution line of 150 microseconds;
II controlled switch both sides collect voltage digital signal simultaneously;
B) close a floodgate the back energising period: controlled switch promptly carries out the Y-time and judges after closing a floodgate, and judges through the Y-time, and is normal as circuit, and then whole judgement control procedure finishes; , carry out Y-time locking and handle then by the control program in single-chip microcomputer output block signal if any fault, controlled switch can not be closed, and the basis for estimation of line fault is that the voltage digital signal of controlled switch load-side continues is zero more than 3.5 seconds.
2, a kind of distribution line failure location and spacer assembly is characterized in that this device comprises:
(1) measurement mechanism (1), voltage sampling apparatus (11) is gathered the voltage that distribution line is divided into each switch ends in each interval, the voltage signal that sampling apparatus is collected converts corresponding digital signal to through amplifier (12) and A/D conversion equipment (13), and is input to and goes in the single-chip microcomputer to handle;
(2) judgment means (2) is analyzed and is handled the voltage signal of gathering, and handles according to controlled switch incoming call, each period corresponding judgment of energising back of closing a floodgate, and judges whether distribution line breaks down;
(3) input/output device (3), parameter setting, manual release, state show and according to judged result, generate the signal that is used for the control switch operation and break down after locking handle;
(4) power circuit and reference voltage device (4) are made up of many groups voltage stabilizing circuit, offer needed various working powers of instrument and reference voltage power supply.
3, distribution line failure location according to claim 2 and spacer assembly, described judgment means (2) is characterised in that and comprises:
(1) single-chip microcomputer (21), it is system's central controller, and storage failure monitoring Control Software program, the voltage of this software collection controlled switch two-termial line, according to of the detection of different periods, judge whether distribution line breaks down, according to judged result to voltage, combined floodgate, forward and reverse locking of control controlled switch, and record trouble direction and fault period;
(2) outer extension memory (22), various Control Parameter, setup parameter, measurement data, operation result, judgement Status Flag and various operational factor and data that storage system is required;
(3) time-setting mechanism (23) by many groups button and decipher circuit accordingly and form, is set the operating time parameter of instrument.
4, distribution line failure location according to claim 2 and spacer assembly, described judgment means (2) is characterised in that and comprises watchdog circuit (24), it is made up of standard module and circuit, guarantees the startup of instrument operation, synchronously and prevent that software program from running and fly.
5, distribution line failure location according to claim 2 and spacer assembly, described input/output device (3) is characterised in that and comprises I/O control device (31), it comprises the input button, the parameter that can manually set and manual release, and can be according to the data processed result of single-chip microcomputer, send output signal, the closure and the block action of controlled switch on the control post.
6, distribution line failure location according to claim 2 and spacer assembly, described input/output device (3) is characterised in that and comprises LED indicating device (32), form by multi-group light-emitting diode and driver circuit thereof, be used to refer to the various operating states of instrument.
7, distribution line failure location according to claim 2 and spacer assembly, it is characterized in that it is installed on each segmentation distribution pillar, with the supporting use of vacuum switch, also can be installed on occasion such as change of user's distribution and city ring main unit on outdoor box change, the box change of looped network, the post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01138660 CN1430318A (en) | 2001-12-29 | 2001-12-29 | Power distibution circuit fault location and isolation method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01138660 CN1430318A (en) | 2001-12-29 | 2001-12-29 | Power distibution circuit fault location and isolation method and device |
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| CN1430318A true CN1430318A (en) | 2003-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01138660 Pending CN1430318A (en) | 2001-12-29 | 2001-12-29 | Power distibution circuit fault location and isolation method and device |
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| CN101483337B (en) * | 2009-02-25 | 2011-01-05 | 北京盛华宏业科技有限公司 | Failure automatic diagnosis and separation apparatus and method for power distribution network overhead line |
| CN102005746A (en) * | 2010-11-30 | 2011-04-06 | 南京南瑞继保电气有限公司 | Method based on topology protection of distributing network |
| CN102195274A (en) * | 2010-03-12 | 2011-09-21 | 深圳市银骏科技有限公司 | Distribution line fault detection control method and system |
| CN102646966A (en) * | 2012-05-04 | 2012-08-22 | 清华大学 | Three-phase fault processing method of distributing line |
| CN102810911A (en) * | 2012-08-08 | 2012-12-05 | 深圳供电局有限公司 | Power line reclosing action method and system based on communication |
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| CN104836215A (en) * | 2015-05-25 | 2015-08-12 | 上海华仪配电自动化有限公司 | Voltage time type intelligent switch controller control method |
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| CN102005746A (en) * | 2010-11-30 | 2011-04-06 | 南京南瑞继保电气有限公司 | Method based on topology protection of distributing network |
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| CN102810911B (en) * | 2012-08-08 | 2014-07-16 | 深圳供电局有限公司 | Power line reclosing action method and system based on communication |
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