CN102707190A - Direct-current-side short-circuit fault distance measuring device and method of metro tractive power supply system - Google Patents
Direct-current-side short-circuit fault distance measuring device and method of metro tractive power supply system Download PDFInfo
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- CN102707190A CN102707190A CN2012100047422A CN201210004742A CN102707190A CN 102707190 A CN102707190 A CN 102707190A CN 2012100047422 A CN2012100047422 A CN 2012100047422A CN 201210004742 A CN201210004742 A CN 201210004742A CN 102707190 A CN102707190 A CN 102707190A
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Abstract
The invention discloses a direct-current-side short-circuit fault distance measuring device and a method of a metro tractive power supply system, relates to the field of distance measurement of faults of a power supply system, and aims to provide the direct-current-side short-circuit fault distance measuring device and the method of the tractive power supply system which are suitable for a railway, particularly a metro. The short-circuit fault distance measuring device of the metro tractive power supply system disclosed by the invention comprises an upper computer; two or more than two two-side feeding traction substations are respectively provided with shunts, four current sampling units, one voltage sampling unit, an AD (Analogue/Digital) converter group, a control processing unit, a GPS (Global Position System) time service unit and a wireless signal sending unit; the short-circuit fault distance measuring method of the metro tractive power supply system comprises the following steps that: each substation simultaneously collects current and voltage of upper and lower rows of contact nets at two sides; whether a short-circuit fault occurs or not is judged according to the size of the current; current and voltage signals are wirelessly transmitted to the upper computer when the short-circuit fault occurs; and the upper computer further calculates the position of the short-circuit fault according to the received current and voltage signals.
Description
Technical field
The present invention relates to electric power system fault range finding field, the particularly fault localization of power supply of urban orbit traffic system dc-side short-circuit.
Background technology
Railway contact line has many electric motor car groups dynamically to get stream at a high speed along the line; Making that contact net is around-the-clock is in vibration, friction, electric arc, the flexible dynamic state of run, and the probability of the general power circuit of possibility of failed because is much bigger between contact net and the walking rail.After the subway transmission line of electricity breaks down, need judge abort situation as early as possible, fix a breakdown, in time recover the subway normal power supply.
Transmission line malfunction is divided into transient fault and permanent fault.Transient fault is the fault type that can restore electricity through reclosing, but trouble spot thin spot often, and these thin spots need find and handle as early as possible, in order to avoid secondary failure or develop into permanent fault.During permanent fault, reclosing is unsuccessful, and electric system is stopped power supply, and must find out fault fast and get rid of this moment, ensures the normal operation of subway movement plan.
In the metro traction electric power system; On a subway line, generally be distributed with more than 10 traction substation and stepdown substation; Rectification Power Factor in each traction substation changes the alternating current of 35Kv or 33Kv the direct current of 1500V into, and Rectification Power Factor is drawn 4 power supply branch roads and is respectively the up contact net on underground railway track both sides, the power supply of descending contact net.
That Fig. 1 shows is the power supply the principle figure of metro traction electric power system between two electric substations; Each electric substation's Rectification Power Factor is drawn 4 power supply branch roads 701,702,703,704; Wherein the branch road in the electric substation 1 701 is the up contact net power supply in this section, and branch road 702 is the descending contact net power supply in this section; Branch road 703 in the electric substation 2 is the up contact net power supply in this section, and 704 is the descending contact net power supply in this section.
Descending contact net and descending rail that F point among the figure is illustrated in this place's section are short-circuited.
Subway contact net fault location device can be realized the accurate location of trouble spot can alleviating the line walking burden of subway power supply maintenance department; Can effectively find the potential safety hazard that fault causes, take corresponding measure to improve the reliability of subway transportation; Fix a breakdown rapidly, shorten power off time, reduce because the loss that has a power failure and cause.Subway contact net fault localization not only helps in time finding and getting rid of fault, guarantees traction net operate as normal, and all is very important for safe, the reliable and economical operation of subway system, has huge social and economical synthesis benefit.
The fault distance-finding method of using always in the electric system in the prior art mainly is impedance method and traveling wave method.
The voltage that impedance method measures during according to fault, the magnitude of current calculate fault distance, suppose that line length and impedance are directly proportional, thereby obtain the distance of fault location device to the trouble spot.
Traveling wave method carries out fault localization according to row ripple transmission theory, can be divided into single-ended traveling wave range finding and both-end travelling wave ranging.During the single-ended traveling wave range finding; When transmission line of electricity breaks down, the capable ripple warp of propagating to the trouble spot from bus after a while after, reflect from the trouble spot again; The time interval is directly proportional with fault distance, promptly can carry out fault localization through detecting this time interval.The capable ripple that both-end travelling wave ranging algorithm utilizes the trouble spot to produce arrives the mistiming realization range finding at two ends for the first time.The traveling wave method fault localization does not receive the influence of circuit types, transition resistance, both sides system impedance in theory, but higher to hardware requirement, and sample rate is fast, and the storage and the analysis of mass data proposed high requirement.
Yet directly application difficulty is very big in subway for impedance method that electric system is commonly used and traveling wave method, and impedance method is to utilize the power frequency component of electric parameters to carry out fault localization usually, and uses direct current supply in the electric power supply system for subway; And the row ripple is propagated with the speed near the light velocity usually, and the traveling wave method range finding more is applicable to the fault localization of voltage levels, long distance line, but the subway power supply arm has only several kilometers, rated voltage 1500V, and it is nonsensical to use traveling wave method.
Summary of the invention
The purpose of this invention is to provide railway especially metro traction electric power system short trouble distance measuring equipment and the method for being applicable to.
The technical scheme that the present invention adopts is such: a kind of metro traction electric power system dc-side short-circuit fault distance measuring equipment; Comprise host computer, be respectively arranged with: shunt, 4 current sampling units, 1 voltage sample unit, AD converter group, controlled processing unit, time service unit, wireless signal transmitting element at the traction substation of two or more two-side feedings;
Of living in each power transformation: have 2 current sampling units to gather the up contact net electric current and the descending contact net electric current of this electric substation A limit track branch road respectively through shunt in 4 current sampling units, other 2 current sampling units are gathered up contact net electric current of this electric substation B limit track branch road and descending contact net electric current respectively through shunt;
Up contact net voltage or A limit track subcircuit downlink contact net voltage or the up contact net voltage of B limit track branch road or the descending contact net voltage of B limit track branch road of this electric substation A limit track branch road is gathered in said voltage sample unit;
The AD converter group has 5 independently AD converters, and has a start-up control end on each AD converter; The corresponding respectively input end that connects 5 independent AD converters in the said AD converter group of the output terminal of said 4 current sampling units and 1 voltage sample unit; The AD output terminal of 5 AD converters of walking around in the device group all has signal with controlled processing unit and is connected, and the start-up control end of 5 AD converters also all has signal with controlled processing unit and is connected in the AD converter group; Controlled processing unit has signal to be connected with the time service unit, receives the temporal information of time service unit output; Controlled processing unit has signal with the wireless signal transmitting element and is connected, and the wireless signal transmitting element is used to receive electric current, the voltage signal of controlled processing unit output and radio to said host computer;
Said host computer is used to receive each electric substation through up contact net electric current, voltage signal or the descending contact net electric current of each bar track branch road of wireless mode transmission, the position that voltage signal calculates the short trouble generation.
Preferably, said controlled processing unit is FPGA, and said FPGA is connected with the time service unit, receives the time mark information and the pulse per second (PPS) of the output of time service unit; FPGA has counter and storer, and pulse per second (PPS) is used for enabling counting device counting, and storer is used for flag information storage time.
Preferably, said host computer quantity is at least 1, and every host computer is communicated by letter with the controlled processing unit of 2 electric substations at least.
A kind of metro traction electric power system dc-side short-circuit fault distance-finding method may further comprise the steps:
Step 401: up contact net electric current and descending contact net electric current and the up contact net electric current of B limit track branch road and the descending contact net electric current of its A limit track branch road during each electric substation timing acquiring synchronization; Simultaneously, up contact net voltage or A limit track subcircuit downlink contact net voltage or the up contact net voltage of B limit track branch road or the descending contact net voltage of B limit track branch road of A limit track branch road is gathered by each electric substation;
Step 402: each electric substation judges that whether the electric current of its A limit, the electric current of B limit track subcircuit downlink contact net, up contact net is greater than setting threshold and holding time less than the time interval of setting greater than setting threshold;
Step 403: when electric substation judge in electric current or the up contact net electric current of B limit track branch road of electric current or B limit track subcircuit downlink contact net of up contact net of electric current or A limit track branch road of its A limit track subcircuit downlink contact net at least one greater than setting threshold and greater than setting threshold hold time less than time interval of setting the time, this current anomaly is then thought by electric substation; The said power transformation corresponding voltage data of unusual electric current and said abnormal current of doing adds get on the right track branch road contact net feeder line sign and acquisition time sign back and is transferred to host computer through wireless mode;
Step 404: the electric current that host computer transmits according to two ends electric substation on the same contact net on the same track branch road, voltage signal calculate the position that short trouble takes place.
Preferably, in step 404, host computer utilizes difference equation
Calculate the position that fault takes place; Wherein, Voltage, the electric current of the location of short circuit place track branch road contact net of location of short circuit one end electric substation transmission when
,
are respectively the short trouble generation; Voltage, the electric current of
,
the location of short circuit place track branch road contact net of location of short circuit other end electric substation transmission when taking place for short trouble;
;
;
is the equivalent resistance of contact net between two electric substations;
is the rail equivalent resistance;
is the contact net equivalent inductance, and
is the rail equivalent inductance.
Preferably; In said step 401, each electric substation adopts 4 current sampling units to gather electric current and the electric current of up contact net, the electric current of B limit track subcircuit downlink contact net and the electric current of up contact net of said electric substation A limit track subcircuit downlink contact net respectively respectively through shunt;
Adopt 1 voltage sample unit to gather the voltage of up contact net of voltage or B limit track branch road of voltage or B limit track subcircuit downlink contact net of up contact net of voltage or the A limit track branch road of said electric substation A limit track subcircuit downlink contact net;
Utilize 5 AD converters that independently have a start-up control end that the signal of said 4 current sampling units and the output of described voltage sample unit is carried out the AD conversion again; 5 independently the output of AD converter be connected to FPGA, FPGA also all has signal to be connected with start-up control end, time service unit, the wireless signal transmitting element of said AD converter;
The time service unit is to FPGA output time flag information and pulse per second (PPS), and FPGA begins counting after receiving pulse per second (PPS), when counting reaches preset SI, starts 5 AD converters samplings simultaneously; FPGA storage simultaneously starts AD converter and starts the time marking when sampling.
Preferably; In the said step 402, the FPGA in each electric substation judges that whether the electric current of its place electric substation A limit, the electric current of B limit track subcircuit downlink contact net, up contact net is greater than setting threshold and holding time less than the time interval of setting greater than setting threshold.
Preferably; In the said step 403; Said FPGA will export to host computer through the wireless signal transmitting element after will adding get on the right track branch road contact net feeder line sign and sampling time sign less than the electric current in the time interval of setting and corresponding voltage signal thereof greater than setting threshold and greater than holding time of setting threshold.
In sum, owing to adopted technique scheme, the invention has the beneficial effects as follows:
1, short trouble distance measuring equipment disclosed by the invention and method have advantage of high precision.
2, short trouble distance measuring equipment among the present invention and method have realized short trouble range finding robotization, can find the position that fault takes place rapidly.
3, short trouble distance-finding method disclosed by the invention need not to measure the equivalent resistance of uplink and downlink contact net, uplink and downlink rail; Last contact net electric current, voltage and descending contact net electric current, the voltage of location of short circuit two ends electric substation can be calculated the position that fault takes place in the time of only need measuring the short trouble generation, have simplified the fault distance that opens circuit greatly and have measured operation.
Description of drawings
The present invention will explain through example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the power supply the principle synoptic diagram of metro traction electric power system between two electric substations in the prior art.
Fig. 2 is the synoptic diagram of short circuit fault location device installation site in electric power system among the present invention.
Fig. 3 is a short circuit fault location device theory diagram among the present invention.
The short trouble transient state equivalent circuit diagram of Fig. 4 both end power supplying.
Fig. 5 is the circuit diagram after circuit diagram shown in Figure 4 passes through
conversion.
Fig. 6 is that back contact net feeder line end typical current oscillogram takes place short trouble.
Embodiment
Disclosed all characteristics in this instructions, or the step in disclosed all methods or the process except mutually exclusive characteristic and/or the step, all can make up by any way.
Disclosed arbitrary characteristic in this instructions (comprising any accessory claim, summary and accompanying drawing) is only if special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, only if special narration, each characteristic is an example in a series of equivalences or the similar characteristics.
Like Fig. 2, on subway is along the line, be provided with host computer, each transformer station all is provided with: shunt, 4 current sampling units, 1 voltage sample unit, AD converter group, controlled processing unit, time service unit, wireless signal transmitting element.Each transformer station among the figure all is a two-side feeding, in order to remove statement, in the literary composition with the track branch road called after A limit track branch road and the B limit track branch road on transformer station both sides.
Have 2 current sampling units to gather the up contact net electric current and the descending contact net electric current of this electric substation A limit track branch road respectively through shunt in 4 current sampling units, other 2 current sampling units are gathered up contact net electric current of this electric substation B limit track branch road and descending contact net electric current respectively through shunt.
The up contact net voltage of this electric substation A limit track branch road and descending contact net voltage; Up contact net voltage of B limit track branch road and descending contact net voltage are identical; The voltage that any place in up contact net voltage, the descending contact net voltage of A limit track branch road, the up contact net voltage of B limit track branch road and the B limit track subcircuit downlink contact net voltage of this electric substation A limit track branch road is gathered in said voltage sample unit gets final product, and more particularly gathers in the electric substation voltage between the anodal busbar and cathode bus bar in the both positive and negative polarity cabinet.
The AD converter group has 5 independently AD converters, and has a start-up control end on each AD converter; The corresponding respectively input end that connects 5 independent AD converters in the said AD converter group of the output terminal of said 4 current sampling units and voltage sample unit; The AD output terminal of 5 AD converters of walking around in the device group all has signal with controlled processing unit and is connected, and the start-up control end of 5 AD converters also all has signal with controlled processing unit and is connected in the AD converter group; Controlled processing unit has signal to be connected with the time service unit, receives the temporal information of time service unit output; Controlled processing unit has signal with the wireless signal transmitting element and is connected, and the wireless signal transmitting element is used to receive electric current, the voltage signal of controlled processing unit output and radio to said host computer.
Said host computer is used to receive each electric substation through up contact net electric current, voltage signal or the descending contact net electric current of each bar track branch road of wireless mode transmission, the position that voltage signal calculates the short trouble generation.
Wherein, current sampling unit specifically is a current transducer, and the voltage sample unit is a voltage transmitter.The time service unit specifically is an atomic clock.Controlled processing unit specifically is FPGA.
Have counter and storer among the FPGA.FPGA links to each other with the time service unit through serial ports, receives the time marking of time service unit output.The counter input end of FPGA also is connected with the pulse per second (PPS) output terminal of time service unit.Counter begins to count according to the FPGA clock internal after receiving pulse per second (PPS); When counting down to preset sampling time interval; FPGA starts sampled signal to the output of AD converter group; 5 AD converters in the AD converter group are gathered voltage, the current value of current time, and FPGA stores the time marking of current time simultaneously.
Short trouble distance-finding method based on above-mentioned metro traction electric power system short trouble range finding comprises:
Step 1: its A limit, the electric current of B limit track subcircuit downlink contact net and the electric current of up contact net during each electric substation timing acquiring synchronization; Simultaneously, up contact net voltage or A limit track subcircuit downlink contact net voltage or the up contact net voltage of B limit track branch road or the descending contact net voltage of B limit track branch road of A limit track branch road is gathered by each electric substation; Because the up contact net voltage of A limit track branch road, A limit track subcircuit downlink contact net voltage, the up contact net voltage of B limit track branch road, the person B limit descending contact net voltage of track branch road all equates, gather in these 4 voltages any one and get final product;
Step 2: each electric substation judges that whether the electric current of its A limit, the electric current of B limit track subcircuit downlink contact net, up contact net is greater than setting threshold and holding time less than the time interval of setting greater than setting threshold;
Step 3: when electric substation judge in electric current or the up contact net electric current of B limit track branch road of electric current or B limit track subcircuit downlink contact net of up contact net of electric current or A limit track branch road of its A limit track subcircuit downlink contact net at least one greater than setting threshold and greater than setting threshold hold time greater than time interval of setting the time, this current anomaly is then thought by electric substation; The said power transformation corresponding voltage data of unusual electric current and said abnormal current of doing adds get on the right track branch road contact net sign and acquisition time sign back and is transferred to host computer through wireless mode;
Step 4: the electric current that host computer transmits according to two ends electric substation on the same contact net on the same track branch road, voltage signal calculate the position that short trouble takes place.
Concrete, in the step 1, controlled processing unit is FPGA; FPGA receives the time marking and the pulse per second (PPS) of time service unit; FPGA begins counting after receiving described pulse per second (PPS), and when counting down to the SI of setting, the FPGA of each transformer station starts the AD converter group; Gather its A of current time, the current/voltage of B limit up-downgoing contact net, simultaneously the time marking of FPGA record current time.
In the step 2, the FPGA in each electric substation judges that whether the electric current of its place electric substation A limit, the electric current of B limit track subcircuit downlink contact net, up contact net is greater than setting threshold and holding time greater than the time interval of setting greater than setting threshold.This is that the short-circuit current rate of change is very big because short trouble is when taking place, and current value sharply rises, and after the circuit breaker trip, electric current begins to descend, with failure removal.From the angle of current amplitude, it is big that amplitude of short circuit is got stream (get stream and be meant that electric locomotive obtains electric current through the pantograph of roof from contact net) than normal hauling engine usually.
But get stream when starting for far-end short trouble and hauling engine, only the angle from current amplitude is difficult to judge, needs to adopt another specific process to judge.Usually short trouble occur to circuit breaker trip, whole time course is generally in 100ms, and the big electric current that hauling engine starts, it is held time and is the several seconds.
Comprehensive these two factors, it is disconnected to carry out the short trouble anticipation above the duration of a certain threshold values according to the short-circuit current before and after the protective relaying device tripping operation.Fig. 6 is the contact net feeder line end typical current oscillogram that short trouble place, back takes place short trouble.
In the step 3; FPGA will export to host computer through the wireless signal transmitting element after will adding get on the right track branch road contact net sign and sampling time sign less than the electric current in the time interval of setting and corresponding voltage signal thereof greater than setting threshold and greater than holding time of setting threshold.Be not difficult to learn that the electric current, the voltage that are in electric substation's transmission at short trouble occurrence positions two ends have identical track branch road contact net sign and sampling time sign.
In the step 4, host computer has received generation that each transformer station transmits electric current, the voltage of track branch road contact net of short trouble filters out track branch road contact net sign and identical electric current, the voltage of sampling time sign, utilizes difference equation
Calculate the position that fault takes place; Wherein, Voltage, the electric current of the location of short circuit place track branch road contact net of location of short circuit one end electric substation transmission when
,
are respectively the short trouble generation; Voltage, the electric current of
,
location of short circuit other end electric substation transmission location of short circuit place track branch road contact net when taking place for short trouble;
;
;
is the contact net equivalent resistance;
is walking net equivalent resistance;
is the contact net equivalent inductance;
for walking net equivalent inductance,
be the wherein ratio of distance and the whole piece track branch road contact net length of an end electric substation of location of short circuit distance.
Below further set forth the derivation of above-mentioned difference equation: Fig. 5 is the short trouble transient state equivalent circuit diagram of both end power supplying.Among the figure;
is the resistance of the up contact net total length of a section;
is the inductance of the up contact net total length of a section;
is the resistance that descending contact net in the m side rectifier distance is arrived in the trouble spot;
is that the interior descending contact net inductance of m side rectifier distance is arrived in the trouble spot;
is that the interior descending contact net resistance of n side rectifier distance is arrived in the trouble spot;
is that the interior descending contact net inductance of n side rectifier distance is arrived in the trouble spot;
is the transition resistance of short dot;
is the rail resistance that m side rectifier is located to the trouble spot;
is the rail inductance that m side rectifier is located to the trouble spot;
is the rail resistance that n side rectifier is located to the trouble spot, and
is the rail inductance that n side rectifier is located to the trouble spot.
is rail all-in resistance in the section,
be the rail total inductance in the section.Fig. 6 is the circuit diagram after circuit diagram shown in Figure 5 passes through
conversion.
Among Fig. 6, the differential equation that any time of short trouble satisfies:
Electric parameter is following in the formula:
Consider the size of resistance and inductance and be directly proportional apart from length, in the following formula:
Make
;
; Because
be a low one magnitude than
; Under the condition of
, any time of short trouble is all satisfied the following differential equation:
Its corresponding difference equation is:
When finding the solution this difference equation, all regard
,
,
,
as unknown number.The time of origin of considering short trouble is about 50ms; And the sampling period of associated voltage electric current is 0.1ms; Be that available data point is about 500; This is a data redundancy for above-mentioned difference equation; Be that the equation number is more than unknown parameter; For this problem, can use least square method to solve more accurate
,
,
,
numerical solution.Obtain
, after
; The two is divided by just obtains the value of
; Further obtain
, the position of finding short trouble to take place.As for
; What
specifically be; Find the solution difference equation and be indifferent to, simplified the operation of measuring the fault occurrence positions greatly.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (8)
1. metro traction electric power system dc-side short-circuit fault distance measuring equipment; It is characterized in that; Comprise host computer, be respectively arranged with: shunt, 4 current sampling units, 1 voltage sample unit, AD converter group, controlled processing unit, time service unit, wireless signal transmitting element at the traction substation of two or more two-side feedings;
Of living in each power transformation: have 2 current sampling units to gather the up contact net electric current and the descending contact net electric current of this electric substation A limit track branch road respectively through shunt in 4 current sampling units, other 2 current sampling units are gathered up contact net electric current of this electric substation B limit track branch road and descending contact net electric current respectively through shunt;
Up contact net voltage or A limit track subcircuit downlink contact net voltage or the up contact net voltage of B limit track branch road or the descending contact net voltage of B limit track branch road of this electric substation A limit track branch road is gathered in said voltage sample unit;
The AD converter group has 5 independently AD converters, and has a start-up control end on each AD converter; The corresponding respectively input end that connects 5 independent AD converters in the said AD converter group of the output terminal of said 4 current sampling units and 1 voltage sample unit; The AD output terminal of 5 AD converters of walking around in the device group all has signal with controlled processing unit and is connected, and the start-up control end of 5 AD converters also all has signal with controlled processing unit and is connected in the AD converter group; Controlled processing unit has signal to be connected with the time service unit, receives the temporal information of time service unit output; Controlled processing unit has signal with the wireless signal transmitting element and is connected, and the wireless signal transmitting element is used to receive electric current, the voltage signal of controlled processing unit output and radio to said host computer;
Said host computer is used to receive each electric substation through up contact net electric current, voltage signal or the descending contact net electric current of each bar track branch road of wireless mode transmission, the position that voltage signal calculates the short trouble generation.
2. a kind of metro traction electric power system dc-side short-circuit fault distance measuring equipment according to claim 1; It is characterized in that; Said controlled processing unit is FPGA, and said FPGA is connected with the time service unit, receives the time mark information and the pulse per second (PPS) of the output of time service unit; FPGA has counter and storer, and pulse per second (PPS) is used for enabling counting device counting, and storer is used for flag information storage time.
3. a kind of metro traction electric power system dc-side short-circuit fault distance measuring equipment according to claim 1 and 2 is characterized in that said host computer quantity is at least 1, and every host computer is communicated by letter with the controlled processing unit of 2 electric substations at least.
4. a metro traction electric power system dc-side short-circuit fault distance-finding method is characterized in that, may further comprise the steps:
Step 401: up contact net electric current and descending contact net electric current and the up contact net electric current of B limit track branch road and the descending contact net electric current of its A limit track branch road during each electric substation timing acquiring synchronization; Simultaneously, up contact net voltage or A limit track subcircuit downlink contact net voltage or the up contact net voltage of B limit track branch road or the descending contact net voltage of B limit track branch road of A limit track branch road is gathered by each electric substation;
Step 402: each electric substation judges that whether the electric current of its A limit, the electric current of B limit track subcircuit downlink contact net, up contact net is greater than setting threshold and holding time less than the time interval of setting greater than setting threshold;
Step 403: when electric substation judge in electric current or the up contact net electric current of B limit track branch road of electric current or B limit track subcircuit downlink contact net of up contact net of electric current or A limit track branch road of its A limit track subcircuit downlink contact net at least one greater than setting threshold and greater than setting threshold hold time less than time interval of setting the time, this current anomaly is then thought by electric substation; The said power transformation corresponding voltage data of unusual electric current and said abnormal current of doing adds get on the right track branch road contact net feeder line sign and acquisition time sign back and is transferred to host computer through wireless mode;
Step 404: the electric current that host computer transmits according to two ends electric substation on the same contact net on the same track branch road, voltage signal calculate the position that short trouble takes place.
5. a kind of metro traction electric power system dc-side short-circuit fault distance-finding method according to claim 4 is characterized in that in step 404, host computer utilizes difference equation
Calculate the position that fault takes place; Wherein, Voltage, the electric current of the location of short circuit place track branch road contact net of location of short circuit one end electric substation transmission when
,
are respectively the short trouble generation; Voltage, the electric current of
,
the location of short circuit place track branch road contact net of location of short circuit other end electric substation transmission when taking place for short trouble;
;
;
is the equivalent resistance of contact net between two electric substations;
is the rail equivalent resistance;
is the contact net equivalent inductance, and
is the rail equivalent inductance.
6. a kind of metro traction electric power system dc-side short-circuit fault distance-finding method according to claim 5; It is characterized in that; In said step 401, each electric substation adopts 4 current sampling units to gather electric current and the electric current of up contact net, the electric current of B limit track subcircuit downlink contact net and the electric current of up contact net of said electric substation A limit track subcircuit downlink contact net respectively respectively through shunt;
Adopt 1 voltage sample unit to gather the voltage of up contact net of voltage or B limit track branch road of voltage or B limit track subcircuit downlink contact net of up contact net of voltage or the A limit track branch road of said electric substation A limit track subcircuit downlink contact net;
Utilize 5 AD converters that independently have a start-up control end that the signal of said 4 current sampling units and the output of described voltage sample unit is carried out the AD conversion again; 5 independently the output of AD converter be connected to FPGA, FPGA also all has signal to be connected with start-up control end, time service unit, the wireless signal transmitting element of said AD converter;
The time service unit is to FPGA output time flag information and pulse per second (PPS), and FPGA begins counting after receiving pulse per second (PPS), when counting reaches preset SI, starts 5 AD converters samplings simultaneously; FPGA storage simultaneously starts AD converter and starts the time marking when sampling.
7. a kind of metro traction electric power system dc-side short-circuit fault distance-finding method according to claim 6; It is characterized in that; In the said step 402, the FPGA in each electric substation judges that whether the electric current of its place electric substation A limit, the electric current of B limit track subcircuit downlink contact net, up contact net is greater than setting threshold and holding time less than the time interval of setting greater than setting threshold.
8. a kind of metro traction electric power system dc-side short-circuit fault distance-finding method according to claim 7; It is characterized in that; In the said step 403; Said FPGA will export to host computer through the wireless signal transmitting element after will adding get on the right track branch road contact net feeder line sign and sampling time sign less than the electric current in the time interval of setting and corresponding voltage signal thereof greater than setting threshold and greater than holding time of setting threshold.
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| CN201210004742.2A CN102707190B (en) | 2012-01-10 | 2012-01-10 | Direct-current-side short-circuit fault distance measuring device and method of metro tractive power supply system |
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| CN201210004742.2A CN102707190B (en) | 2012-01-10 | 2012-01-10 | Direct-current-side short-circuit fault distance measuring device and method of metro tractive power supply system |
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| CN102707190A true CN102707190A (en) | 2012-10-03 |
| CN102707190B CN102707190B (en) | 2014-10-08 |
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| CN201210004742.2A Active CN102707190B (en) | 2012-01-10 | 2012-01-10 | Direct-current-side short-circuit fault distance measuring device and method of metro tractive power supply system |
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| CN103116114A (en) * | 2013-01-23 | 2013-05-22 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Fault location method and system under direct current deicing device earth wire deicing mode |
| ES2424897A1 (en) * | 2013-07-31 | 2013-10-09 | Universidad De La Rioja | Wireless feeding device for railway systems (Machine-translation by Google Translate, not legally binding) |
| CN103439559A (en) * | 2013-08-06 | 2013-12-11 | 浙江大学 | Method for calculating transient currents in short circuit of any position of rail traffic direct-current traction network |
| CN103434420A (en) * | 2013-07-29 | 2013-12-11 | 华北电力大学（保定） | Braking energy recovery type DC (Direct Current) traction power supply system basing on electric automobile charging |
| RU2561067C1 (en) * | 2014-08-04 | 2015-08-20 | Владимир Евдокимович Осипов | Differential protection system for direct-current traction network |
| CN105425102A (en) * | 2015-11-03 | 2016-03-23 | 成都交大许继电气有限责任公司 | High speed railway fault distance measuring system based on power supply arms |
| CN105425113A (en) * | 2015-12-22 | 2016-03-23 | 中国神华能源股份有限公司 | Method and system for fault positioning of contact net |
| CN106254549A (en) * | 2016-09-30 | 2016-12-21 | 株洲中车时代电气股份有限公司 | Method and system based on onboard system each to the subway time service of vehicle-mounted information service net |
| CN104316832B (en) * | 2014-10-08 | 2017-04-05 | 成都交大许继电气有限责任公司 | Suitable for the tractive power supply system fault distance-finding method of various methods of operation |
| CN107015102A (en) * | 2017-05-12 | 2017-08-04 | 武汉中直电气股份有限公司 | The distance-finding method and system of a kind of direct current rail transportation supply line short trouble |
| CN107064734A (en) * | 2017-03-17 | 2017-08-18 | 北京交通大学 | A kind of flexible direct current Fault Location for Distribution Network method of utilization fault transient process |
| CN107391814A (en) * | 2017-07-03 | 2017-11-24 | 西南交通大学 | A kind of Traction networks EMUs modeling method for high ferro yard |
| CN108387814A (en) * | 2018-01-12 | 2018-08-10 | 广州市扬新技术研究有限责任公司 | The urban rail transit contact network fault locator and method of the bilateral switching power supply of size |
| CN108398612A (en) * | 2018-01-12 | 2018-08-14 | 广州市扬新技术研究有限责任公司 | A kind of urban track traffic DC power-supply system short trouble localization method |
| CN108414888A (en) * | 2018-01-12 | 2018-08-17 | 广州市扬新技术研究有限责任公司 | A kind of localization method of urban rail transit contact network to rail failure |
| CN108957238A (en) * | 2018-08-01 | 2018-12-07 | 广州白云电器设备股份有限公司 | The device and method of urban rail transit contact network fault location |
| CN108957235A (en) * | 2018-08-01 | 2018-12-07 | 广州白云电器设备股份有限公司 | Localization method, device and the fault test set of urban rail transit contact network ground fault |
| CN109031046A (en) * | 2018-08-24 | 2018-12-18 | 西南交通大学 | A kind of electric railway switching station fault detection means and its method |
| CN109100612A (en) * | 2018-08-01 | 2018-12-28 | 广州白云电器设备股份有限公司 | Urban rail transit contact network short trouble localization method, device and electric terminal |
| CN109444689A (en) * | 2018-11-19 | 2019-03-08 | 中国矿业大学 | A kind of subway/coal mine reflux track insulating damage position and its transition resistance monitoring method |
| CN109782136A (en) * | 2018-12-27 | 2019-05-21 | 刘中生 | A method of contact net defective locations are determined based on longitudinal wave shear wave velocity difference |
| CN111308167A (en) * | 2018-12-12 | 2020-06-19 | 惠州市蓝微电子有限公司 | Short circuit and overcurrent detection method |
| CN112356881A (en) * | 2020-09-27 | 2021-02-12 | 北京交通大学 | Train positioning method |
| CN112415433A (en) * | 2019-08-21 | 2021-02-26 | 华东师范大学 | Long-lead short-circuit fault point positioning device and method |
| CN116577607A (en) * | 2023-05-26 | 2023-08-11 | 西门子交通技术(北京)有限公司 | Fault positioning method, controller, equipment, power supply network and storage medium |
| CN116679236A (en) * | 2023-06-01 | 2023-09-01 | 中铁一局集团电务工程有限公司 | LSM-based subway contact network short-circuit impedance and short-circuit simulation test method and system |
| CN117347790A (en) * | 2023-10-30 | 2024-01-05 | 天津凯发电气股份有限公司 | Method for judging and measuring reflux negative-to-ground short circuit fault of special rail for subway |
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| CN103116114B (en) * | 2013-01-23 | 2015-08-19 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Fault distance-finding method under a kind of DC de-icing device ground wire deicing pattern and system |
| CN103116114A (en) * | 2013-01-23 | 2013-05-22 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Fault location method and system under direct current deicing device earth wire deicing mode |
| CN103434420A (en) * | 2013-07-29 | 2013-12-11 | 华北电力大学（保定） | Braking energy recovery type DC (Direct Current) traction power supply system basing on electric automobile charging |
| CN103434420B (en) * | 2013-07-29 | 2016-02-17 | 华北电力大学（保定） | Based on the Brake energy recovery formula DC traction power-supply system of charging electric vehicle |
| ES2424897A1 (en) * | 2013-07-31 | 2013-10-09 | Universidad De La Rioja | Wireless feeding device for railway systems (Machine-translation by Google Translate, not legally binding) |
| CN103439559A (en) * | 2013-08-06 | 2013-12-11 | 浙江大学 | Method for calculating transient currents in short circuit of any position of rail traffic direct-current traction network |
| CN103439559B (en) * | 2013-08-06 | 2015-07-15 | 浙江大学 | Method for calculating transient currents in short circuit of any position of rail traffic direct-current traction network |
| RU2561067C1 (en) * | 2014-08-04 | 2015-08-20 | Владимир Евдокимович Осипов | Differential protection system for direct-current traction network |
| CN104316832B (en) * | 2014-10-08 | 2017-04-05 | 成都交大许继电气有限责任公司 | Suitable for the tractive power supply system fault distance-finding method of various methods of operation |
| CN105425102A (en) * | 2015-11-03 | 2016-03-23 | 成都交大许继电气有限责任公司 | High speed railway fault distance measuring system based on power supply arms |
| CN105425113A (en) * | 2015-12-22 | 2016-03-23 | 中国神华能源股份有限公司 | Method and system for fault positioning of contact net |
| CN105425113B (en) * | 2015-12-22 | 2019-12-03 | 中国神华能源股份有限公司 | Contact network fault positioning method and system |
| CN106254549A (en) * | 2016-09-30 | 2016-12-21 | 株洲中车时代电气股份有限公司 | Method and system based on onboard system each to the subway time service of vehicle-mounted information service net |
| CN107064734A (en) * | 2017-03-17 | 2017-08-18 | 北京交通大学 | A kind of flexible direct current Fault Location for Distribution Network method of utilization fault transient process |
| CN107015102A (en) * | 2017-05-12 | 2017-08-04 | 武汉中直电气股份有限公司 | The distance-finding method and system of a kind of direct current rail transportation supply line short trouble |
| CN107391814A (en) * | 2017-07-03 | 2017-11-24 | 西南交通大学 | A kind of Traction networks EMUs modeling method for high ferro yard |
| CN108387814A (en) * | 2018-01-12 | 2018-08-10 | 广州市扬新技术研究有限责任公司 | The urban rail transit contact network fault locator and method of the bilateral switching power supply of size |
| CN108398612A (en) * | 2018-01-12 | 2018-08-14 | 广州市扬新技术研究有限责任公司 | A kind of urban track traffic DC power-supply system short trouble localization method |
| CN108414888A (en) * | 2018-01-12 | 2018-08-17 | 广州市扬新技术研究有限责任公司 | A kind of localization method of urban rail transit contact network to rail failure |
| CN108957238A (en) * | 2018-08-01 | 2018-12-07 | 广州白云电器设备股份有限公司 | The device and method of urban rail transit contact network fault location |
| CN109100612A (en) * | 2018-08-01 | 2018-12-28 | 广州白云电器设备股份有限公司 | Urban rail transit contact network short trouble localization method, device and electric terminal |
| CN108957235A (en) * | 2018-08-01 | 2018-12-07 | 广州白云电器设备股份有限公司 | Localization method, device and the fault test set of urban rail transit contact network ground fault |
| CN108957238B (en) * | 2018-08-01 | 2020-11-03 | 广州白云电器设备股份有限公司 | Device and method for positioning faults of urban rail transit contact network |
| CN109031046B (en) * | 2018-08-24 | 2023-05-30 | 西南交通大学 | Fault detection device and method for electrified railway switching station |
| CN109031046A (en) * | 2018-08-24 | 2018-12-18 | 西南交通大学 | A kind of electric railway switching station fault detection means and its method |
| CN109444689A (en) * | 2018-11-19 | 2019-03-08 | 中国矿业大学 | A kind of subway/coal mine reflux track insulating damage position and its transition resistance monitoring method |
| CN109444689B (en) * | 2018-11-19 | 2020-03-27 | 中国矿业大学 | Subway/coal mine backflow track insulation damage position and transition resistance monitoring method thereof |
| CN111308167A (en) * | 2018-12-12 | 2020-06-19 | 惠州市蓝微电子有限公司 | Short circuit and overcurrent detection method |
| CN109782136A (en) * | 2018-12-27 | 2019-05-21 | 刘中生 | A method of contact net defective locations are determined based on longitudinal wave shear wave velocity difference |
| CN109782136B (en) * | 2018-12-27 | 2021-04-09 | 刘中生 | Method for determining defect position of contact net based on longitudinal wave and transverse wave speed difference |
| CN112415433A (en) * | 2019-08-21 | 2021-02-26 | 华东师范大学 | Long-lead short-circuit fault point positioning device and method |
| CN112356881A (en) * | 2020-09-27 | 2021-02-12 | 北京交通大学 | Train positioning method |
| CN116577607A (en) * | 2023-05-26 | 2023-08-11 | 西门子交通技术(北京)有限公司 | Fault positioning method, controller, equipment, power supply network and storage medium |
| CN116577607B (en) * | 2023-05-26 | 2024-05-03 | 西门子交通技术(北京)有限公司 | Fault positioning method, controller, equipment, power supply network and storage medium |
| CN116679236A (en) * | 2023-06-01 | 2023-09-01 | 中铁一局集团电务工程有限公司 | LSM-based subway contact network short-circuit impedance and short-circuit simulation test method and system |
| CN116679236B (en) * | 2023-06-01 | 2024-05-17 | 中铁一局集团电务工程有限公司 | LSM-based subway contact network short-circuit impedance and short-circuit simulation test method and system |
| CN117347790A (en) * | 2023-10-30 | 2024-01-05 | 天津凯发电气股份有限公司 | Method for judging and measuring reflux negative-to-ground short circuit fault of special rail for subway |
| CN117347790B (en) * | 2023-10-30 | 2024-03-12 | 天津凯发电气股份有限公司 | Method for judging and measuring reflux negative-to-ground short circuit fault of special rail for subway |
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Address after: 610045 Wuhou District, Sichuan Province, Wu Xing Road, No. 28, West Chi Valley A1-1-9 Patentee after: Chengdu Tang source electrical Limited by Share Ltd Address before: 610045 Wuhou District, Sichuan Province, Wu Xing Road, No. 28, West Chi Valley A1-1-9 Patentee before: Chengdu Tangyuan Electric Co., Ltd. |