CN103151763B  A kind of electric railway AT Traction networks fault distinguishing and guard method  Google Patents
A kind of electric railway AT Traction networks fault distinguishing and guard method Download PDFInfo
 Publication number
 CN103151763B CN103151763B CN201210453581.5A CN201210453581A CN103151763B CN 103151763 B CN103151763 B CN 103151763B CN 201210453581 A CN201210453581 A CN 201210453581A CN 103151763 B CN103151763 B CN 103151763B
 Authority
 CN
 China
 Prior art keywords
 coupling section
 self coupling
 contact line
 value
 far
 Prior art date
 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
 Active
Links
Landscapes
 Electric Propulsion And Braking For Vehicles (AREA)
 Locating Faults (AREA)
 Emergency Protection Circuit Devices (AREA)
 Testing Of ShortCircuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
 Train Traffic Observation, Control, And Security (AREA)
Abstract
A kind of electric railway AT Traction networks fault distinguishing and guard method, when net forces down in setting, unloaded trend value of symbol that is contact line T and negative feeder F in each self coupling section is near, farend is designated as 0, and the trend value of symbol of inflow is 1, and the trend value of symbol of outflow is1; If have: in self coupling section contact line T two ends trend value of symbol be more than or equal to 1 with the absolute value of value, or the Fault load flow value of symbol at negative feeder F two ends be more than or equal to 1 with the absolute value of value, or the Fault load flow value of symbol at contact line T branch road and negative feeder F branch road two ends be all more than or equal to 1 with the absolute value of value; Then judge respectively to come in contact net T shorted to earth fault or negative feeder F shorted to earth fault or contact line T in this self coupling section to negative feeder F short trouble; And disconnect all circuit breakers at these self coupling section two ends; Abort situation is determined by the length of the relevant voltage at these self coupling section two ends and the shortcircuit reactance of calculation of shortcircuit current and corresponding self coupling section.
Description
Technical field
The present invention relates to a kind of electric railway AT Traction networks fault distinguishing and guard method.
Background technology
Electric railway traction power supply system is made up of traction substation and Traction networks, and Traction networks is made up of contact line, train, rail (and ground).Traction networks generally adopts the simple direct feeding system of structure.For adapting to the operation demand of the highpower train of highspeed railway, Japan, highspeed railway Traction networks that is French and China all have employed autotransformer (AT) supply power mode.For strengthening power supply capacity further, China also all have employed the supply power mode of updowngoing in autotransformer (AT) place's parallel connection on nearly 10,000km highspeed railways, is called allparallel AT traction system mode.But, must see, the complexity of the electric power networks formed due to AT Traction networks, nonlinear, the ambiguity of Traction networks reactancerange performance entered viewed from traction bus and the restriction of existing technology, make the searching of Traction networks fault, locate, excise, isolate and become difficulty and inaccurate, simultaneously, any one fault of full Parallel AT Traction networks will cause whole piece Traction networks to be stopped transport, greatly reduce again the reliability of natively weak Traction networks, affect, restrict the good operation of highspeed railway on the contrary.
Summary of the invention
Object of the present invention is just to provide a kind of electric railway AT Traction networks fault distinguishing and guard method; the method can reflect fault type and the position of Traction networks in time, quickly and accurately; and can excise rapidly, isolate and fix a breakdown; reduce accident and coverage, improve the reliability of traction power supply.
The present invention solves its technical problem, and the technical scheme adopted is: a kind of electric railway AT Traction networks fault distinguishing and guard method, the steps include:
The negative feeder magnitude of voltage that the contact line magnitude of voltage that the contact line T voltage to earth instrument transformer that A, measurement and control center's realtime synchronization gather each autotransformer ATn place detects, negative feeder F voltage to earth instrument transformer detect, wherein n is the sequence number of self coupling section, n=1,2,3 ..., N; When all contact line magnitudes of voltage, negative feeder magnitude of voltage are all more than or equal to setting, then judge that Traction networks is not shortcircuited fault, does not take protection act to Traction networks; Otherwise, carry out the operation of following steps;
B, measurement and control center's realtime synchronization gather near, farend current value ITna, ITnb of the contact line T that the current transformer that is near, farend of contact line T in each self coupling section n detects, and realtime synchronization gathers near, farend current value IFna, the IFnb of the negative feeder F that the current transformer that is near, farend of negative feeder F detects in each self coupling section n; According near, farend current value ITna, ITnb of each self coupling section contact line T, near, farend current value IFna, IFnb of each self coupling section negative feeder F, measurement and control center's realtime judge goes out that each self coupling section n contact line T is near, farend and negative feeder F is near, the direction of tide of farend, and the trend value of symbol of inflow direction is demarcated as 1, flows out that the trend value of symbol in direction is demarcated as1, unloaded trend value of symbol is demarcated as 0;
If C has, the interior contact line T of self coupling section n ' is near, the trend value of symbol of farend be more than or equal to 1 with the absolute value of value, but the interior negative feeder F of this self coupling section n ' is near, the trend value of symbol of farend be less than 1 with the absolute value of value, then measurement and control center judges that this self coupling section n ' inside comes in contact net T shorted to earth fault, make contact line circuit breaker KTn ' a, KTn ' b separating brake at this self coupling section n ' two ends, overlap again, successful reclosing, then recover normal;
Reclosing failure, then make that this self coupling section n ' is near, contact line circuit breaker KTn ' a, the KTn ' b separating brake together with negative feeder circuit breaker KFn ' a, KFn ' b of farend; Simultaneously, one end that this self coupling section n ' is near, farend short circuit currents is larger is selected by measurement and control center, and calculate shortcircuit reactance by the autotransformer ATn ' nearest with this end or the contact line magnitude of voltage at AT (n '+1) place and this end current value of contact line, and the contact line T of this self coupling section n ' and total reactance in rail loop, then draw the distance of short circuit trouble point apart from this autotransformer ATn ' or AT (n '+1) by the length that the ratio of shortcircuit reactance and this total reactance is multiplied by this self coupling section n;
If D has, the interior negative feeder F of self coupling section n ' is near, the trend value of symbol of farend be more than or equal to 1 with the absolute value of value, but the interior contact line T of this self coupling section n ' is near, the trend value of symbol of farend with value be less than 1, then measurement and control center judges this self coupling section n ' interior generation negative feeder F shorted to earth fault, make negative feeder circuit breaker KFn ' a, KFn ' b separating brake at this self coupling section n ' two ends, overlap again, successful reclosing, then recover normal;
Reclosing failure, then make that this self coupling section n ' is near, negative feeder circuit breaker KFn ' a, the KFn ' b separating brake together with contact line circuit breaker KTn ' a, KTn ' b of farend; Simultaneously, one end that this self coupling section n ' is near, farend short circuit currents is larger is selected by measurement and control center, and calculate shortcircuit reactance by the autotransformer ATn ' nearest with this end or the negative feeder magnitude of voltage at AT (n '+1) place and this end current value of negative feeder, and the negative feeder F of this self coupling section n ' and total reactance in rail loop, then draw the distance of short circuit trouble point apart from this autotransformer ATn ' or AT (n '+1) by the length that the ratio of shortcircuit reactance and this total reactance is multiplied by this self coupling section n;
If F has, self coupling section n ' interior contact line T is near, the trend value of symbol of farend with value be more than or equal to 1 and the interior negative feeder F of this self coupling section n ' closely, the trend value of symbol of farend be also more than or equal to 1 with the absolute value of value, then measurement and control center judges that this self coupling section n ' inside comes in contact net T to negative feeder F short trouble, or comes in contact net T and negative feeder F simultaneously short trouble over the ground; Measurement and control center makes contact line circuit breaker KTn ' a, KTn ' b and negative feeder circuit breaker KFn ' a, the equal separating brake of KFn ' b at this self coupling section n two ends, then overlaps, successful reclosing, then recover normal;
Reclosing failure, then make that this self coupling section n ' is near, contact line circuit breaker KTn ' a, the KTn ' b of farend and negative feeder circuit breaker KFn ' a, KFn ' b separating brake again; Simultaneously, simultaneously, one end that this self coupling section n ' is near, farend short circuit currents is larger is selected by measurement and control center, and by the contact line magnitude of voltage at the autotransformer ATn ' nearest with this end or AT (n '+1) place, negative feeder magnitude of voltage and calculate shortcircuit reactance with this end current value of contact line and calculate shortcircuit reactance, and total reactance in this self coupling section n ' interior contact line T and negative feeder F loop, then draw the distance of short circuit trouble point apart from this autotransformer ATn ' or AT (n '+1) by the length that the ratio of shortcircuit reactance and this total reactance is multiplied by this self coupling section n '.
Operation principle of the present invention is:
By gathering autotransformer ATn place contact line T and the negative feeder F voltage to earth value of each self coupling section n; when there being contact line magnitude of voltage, negative feeder magnitude of voltage is less than or equal to setting; show that Traction networks there occurs short trouble, its position need be judged and take protection act.
Now, measurement and control center's realtime synchronization gathers the contact line current value at the contact line T two ends near, far away in each self coupling (AT) section n, the current value at negative feeder F two ends near, far away, and judge that each self coupling section n contact line T is near according to this, farend and negative feeder F is near, the direction of tide of farend, and the trend value of symbol of inflow direction is demarcated as 1, flows out that the trend value of symbol in direction is demarcated as1, unloaded trend value of symbol is demarcated as 0;
Due to contact line or negative feeder two ends in self coupling section trend value of symbol be more than or equal to 1 with the absolute value of value time, show to flow on this section of circuit not mate with the electric current flowed out, there is the leakage of big current, determine accordingly to there occurs short trouble on this section of circuit, thus determine self coupling section and the fault type (contact line shorted to earth, negative feeder shorted to earth, contact line are to negative feeder short circuit) thereof of the guilty culprit that is shortcircuited, and make corresponding breaker open operation and reclosing, in this way instantaneous short circuit or interference caused by, then can reclosing success; Unsuccessful reclosing, then show that short trouble is permanent fault, and measurement and control center makes the permanent separating brake of all circuit breakers of this self coupling section (until after confirming failture evacuation, then closing a floodgate); And and then drawn the particular location of fault point by the reactance of shortcircuit loop.
Compared with prior art, the invention has the beneficial effects as follows:
One, the present invention introduces the voltage to earth value of autotransformer ATn place contact line T and negative feeder F, the current value of symbol at each self coupling section two ends with value as criterion, can facilitate, reliably judge out of order type and particular location, and all circuit breakers at timely self coupling section two ends, open failure place, enhance the selectivity of relaying protection, quickaction and reliability, more effective, excise exactly, isolation, fix a breakdown, avoid the extension of fault effects, ensure that the continuation of nonfaulting section in Traction networks runs, reduce power failure range, and then improve the reliability of traction power supply.On the other hand, operator on duty passes through the measurement and control center in electric substation or control room, can under power failure state, in time, accurately understand, grasp type and the particular location of fault in Traction networks, maintenance personal is guided accurately to go to field service, fix a breakdown, ensure that train recovers rapidly normal operation, decrease the loss of power failure.
Two, the present invention can be combined with TD information further, strengthens controllability and the flexibility of Traction networks operational mode.
Three, the invention process is got up to invest less, both can be used for new line construction and has also been applicable to the transformation of old line.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the embodiment of the present invention.
Embodiment
Embodiment 1
Fig. 1 illustrates, a kind of embodiment of the present invention is: a kind of electric railway AT Traction networks fault distinguishing and guard method, the steps include:
The negative feeder magnitude of voltage that the contact line magnitude of voltage that the contact line T voltage to earth instrument transformer that A, measurement and control center's realtime synchronization gather each autotransformer ATn place detects, negative feeder F voltage to earth instrument transformer detect, wherein n is the sequence number of self coupling section, n=1,2,3 ..., N; When all contact line magnitudes of voltage, negative feeder magnitude of voltage are all more than or equal to setting, then judge that Traction networks is not shortcircuited fault, does not take protection act to Traction networks; Otherwise, carry out the operation of following steps;
B, measurement and control center's realtime synchronization gather near, farend current value ITna, ITnb of the contact line T that the current transformer that is near, farend of contact line T in each self coupling section n detects, and realtime synchronization gathers near, farend current value IFna, the IFnb of the negative feeder F that the current transformer that is near, farend of negative feeder F detects in each self coupling section n; According near, farend current value ITna, ITnb of each self coupling section contact line T, near, farend current value IFna, IFnb of each self coupling section negative feeder F, measurement and control center's realtime judge goes out that each self coupling section n contact line T is near, farend and negative feeder F is near, the direction of tide of farend, and the trend value of symbol of inflow direction is demarcated as 1, flows out that the trend value of symbol in direction is demarcated as1, unloaded trend value of symbol is demarcated as 0;
If C has, the interior contact line T of self coupling section n ' is near, the trend value of symbol of farend be more than or equal to 1 with the absolute value of value, but the interior negative feeder F of this self coupling section n ' is near, the trend value of symbol of farend be less than 1 with the absolute value of value, then measurement and control center judges that this self coupling section n ' inside comes in contact net T shorted to earth fault, make contact line circuit breaker KTn ' a, KTn ' b separating brake at this self coupling section n ' two ends, overlap again, successful reclosing, then recover normal;
Reclosing failure, then make that this self coupling section n ' is near, contact line circuit breaker KTn ' a, the KTn ' b separating brake together with negative feeder circuit breaker KFn ' a, KFn ' b of farend; Simultaneously, one end that this self coupling section n ' is near, farend short circuit currents is larger is selected by measurement and control center, and calculate shortcircuit reactance by the autotransformer ATn ' nearest with this end or the contact line magnitude of voltage at AT (n '+1) place and this end current value of contact line, and the contact line T of this self coupling section n ' and total reactance in rail loop, then draw the distance of short circuit trouble point apart from this autotransformer ATn ' or AT (n '+1) by the length that the ratio of shortcircuit reactance and this total reactance is multiplied by this self coupling section n.
As: in Fig. 1, in self coupling section n '=2 i.e. self coupling section 2 near, the farend of contact line T trend value of symbol equal 2 with value, in self coupling section 2 near, the farend of negative feeder trend value of symbol be zero with value, other self couplings section n (n=1,3,4 ..., N) near, the farend of contact line T and negative feeder F is near, the trend value of symbol of farend be zero with value.Measurement and control center then judges to come in contact net T shorted to earth fault in self coupling section 2, makes contact line circuit breaker KT2a, KT2b separating brake at self coupling section 2 two ends near, far away, then overlaps, successful reclosing, then recover normal.Reclosing failure, then make contact line circuit breaker KT2a, KT2b separating brake together with negative feeder circuit breaker KF2a, KF2b at self coupling section 2 two ends near, far away; Simultaneously, measurement and control center's contrast find the short circuit current IT2a of self coupling section 2 contact line T nearend be greater than contact line T farend short circuit current IT2b, the contact line magnitude of voltage at autotransformer AT2 place (i.e. the autotransformer of self coupling section 2) nearest with self coupling section 2 contact line T nearend and the contact line current value IT2a of this end is then selected to calculate shortcircuit reactance, and the contact line T of self coupling section 2 and total reactance in rail loop, the length being multiplied by self coupling section 2 with the ratio of shortcircuit reactance and total reactance draws the distance of short circuit trouble point apart from autotransformer AT2.
And for example in Fig. 1, if the trend value of symbol of contact line T nearend is 1 and the trend value of symbol of farend is 0 in self coupling section n '=2 i.e. self coupling section 2, the absolute value of itself and value equals 1; In self coupling section 2 near, the farend of negative feeder trend value of symbol be zero with value, other self couplings section n (n=1,3,4 ..., N) contact line T and negative feeder F nearend and farend trend value of symbol be zero with value; Measurement and control center then judges that shorted to earth fault occurs the contact line T in self coupling section 2.Simultaneously, because the trend value of symbol of contact line T nearend in self coupling section 2 is 1 and the trend value of symbol of farend is 0, namely also nearend has that electric current flows into, farend do not have electric current to flow through measurement and control center can to judge further: near the nearend generation shorted to earth fault of autotransformer AT2 contact line T, farend then disconnection fault occurs.Measurement and control center's contrast find the short circuit current IT2a of self coupling section 2 contact line T nearend much larger than contact line T farend breaking current IT2b, the contact line magnitude of voltage at autotransformer AT2 place nearest with self coupling section 2 contact line T nearend and the contact line current value IT2a of this end is then selected to calculate shortcircuit reactance, and the contact line T of self coupling section 2 and total reactance in rail loop, the length being multiplied by self coupling section 2 with the ratio of shortcircuit reactance and total reactance draws the distance of short circuit trouble point apart from autotransformer AT2.
If D has, the interior negative feeder F of self coupling section n ' is near, the trend value of symbol of farend be more than or equal to 1 with the absolute value of value, but the interior contact line T of this self coupling section n ' is near, the trend value of symbol of farend with value be less than 1, then measurement and control center judges this self coupling section n ' interior generation negative feeder F shorted to earth fault, make negative feeder circuit breaker KFn ' a, KFn ' b separating brake at this self coupling section n ' two ends, overlap again, successful reclosing, then recover normal;
Reclosing failure, then make that this self coupling section n ' is near, negative feeder circuit breaker KFn ' a, the KFn ' b separating brake together with contact line circuit breaker KTn ' a, KTn ' b of farend; Simultaneously, one end that this self coupling section n ' is near, farend short circuit currents is larger is selected by measurement and control center, and calculate shortcircuit reactance by the autotransformer ATn ' nearest with this end or the negative feeder magnitude of voltage at AT (n '+1) place and this end current value of negative feeder, and the negative feeder F of this self coupling section n ' and total reactance in rail loop, then draw the distance of short circuit trouble point apart from this autotransformer ATn ' or AT (n '+1) by the length that the ratio of the total reactance of shortcircuit reactance and loop is multiplied by this self coupling section n.
As: in Fig. 1, in self coupling section n '=2 i.e. self coupling section 2 near, the farend of negative feeder F trend value of symbol equal 2 with value, in self coupling section 2 near, the farend of contact line T trend value of symbol be zero with value, other self couplings section n (n=1,3,4 ..., N) near, the farend of contact line T and negative feeder is near, the trend value of symbol of farend be zero with value.Measurement and control center then judges negative feeder F shorted to earth fault occurs in self coupling section 2, makes negative feeder circuit breaker KT2a, KT2b separating brake at self coupling section 2 two ends near, far away, then overlaps, successful reclosing, then recover normal.Reclosing failure, then make negative feeder circuit breaker KF2a, KF2b separating brake together with contact line circuit breaker KT2a, KT2b at self coupling section 2 two ends near, far away; Simultaneously, measurement and control center's contrast find the short circuit current IF2a of self coupling section 2 negative feeder F nearend be greater than negative feeder F farend short circuit current IF2b, the negative feeder magnitude of voltage at autotransformer AT2 place nearest with self coupling section 2 negative feeder F nearend and the current value IF2a of this end of negative feeder F is then selected to calculate shortcircuit reactance, and total reactance in the negative feeder F of self coupling section 2 and the loop of rail, the length being multiplied by self coupling section 2 with the ratio of shortcircuit reactance and total reactance draws the distance of short circuit trouble point apart from autotransformer AT2.
If F has, self coupling section n ' interior contact line T is near, the trend value of symbol of farend with value be more than or equal to 1 and the interior negative feeder F of this self coupling section n ' closely, the trend value of symbol of farend be also more than or equal to 1 with the absolute value of value, then measurement and control center judges that this self coupling section n ' inside comes in contact net T to negative feeder F short trouble, or comes in contact net T and negative feeder F simultaneously short trouble over the ground; Measurement and control center makes contact line circuit breaker KTn ' a, KTn ' b and negative feeder circuit breaker KFn ' a, the equal separating brake of KFn ' b at this self coupling section n two ends, then overlaps, successful reclosing, then recover normal;
Reclosing failure, then make that this self coupling section n ' is near, contact line circuit breaker KTn ' a, the KTn ' b of farend and negative feeder circuit breaker KFn ' a, KFn ' b separating brake again; One end that this self coupling section n ' is near, farend short circuit currents is larger is selected by measurement and control center simultaneously, and by the contact line magnitude of voltage at the autotransformer ATn ' nearest with this end or AT (n '+1) place, negative feeder magnitude of voltage and calculate shortcircuit reactance with this end current value of contact line and calculate shortcircuit reactance, and the total reactance in loop of this self coupling section n ' interior contact line T and negative feeder F, then draw the distance of short circuit trouble point apart from this autotransformer ATn ' or AT (n '+1) by the length that the ratio of the total reactance of shortcircuit reactance and this loop is multiplied by this self coupling section n '.
As: in Fig. 1, if in self coupling section n '=3 i.e. self coupling section 3, contact line T is near, the trend value of symbol of farend be 2 with the absolute value of value, in self coupling section 3 negative feeder F closely, the trend value of symbol of farend be also 2 with the absolute value of value; Other self couplings section n (n=1,2,4 ..., N) near, the farend of contact line T and negative feeder is near, the trend value of symbol of farend be zero with value.Measurement and control center then judges to come in contact the short trouble between net T and negative feeder F in self coupling section 3, makes contact line circuit breaker KT3a, KT3b and the equal separating brake of negative feeder circuit breaker KF3a, KF3b at self coupling section 3 two ends, then overlaps, successful reclosing, then recover normal.Reclosing failure, then make that self coupling section 3 is near, contact line circuit breaker KT3a, KT3b of farend and negative feeder circuit breaker KF3a, KF3b separating brake all again, simultaneously, measurement and control center's contrast finds that the short circuit current IT3a (equal negative feeder F nearend short circuit current IF3a) of self coupling section 3 contact line T nearend is greater than the short circuit current IT3b (equaling the short circuit current IF3b of negative feeder F farend) of the contact line T of farend, the current value IT3a in the contact line circuit breaker KT3a of autotransformer AT3 (i.e. the autotransformer of self coupling section 3) place's contact line magnitude of voltage nearest with self coupling section 3 contact line T nearend and negative feeder magnitude of voltage and this end is then selected to calculate shortcircuit reactance, and total reactance in self coupling section 3 contact line T and negative feeder F loop, the length being multiplied by self coupling section 3 with the ratio of shortcircuit reactance and total reactance draws the distance of short circuit trouble point apart from the autotransformer AT3 of self coupling section 3.
Obviously, the specific occurrence that the n ' in the present invention is n is the sequence number that contact line T (or negative feeder F) there occurs the self coupling section of short trouble, as in Fig. 1, and n '=2 or 3.
Method of the present invention can also judge the combined failure that open circuit also occurs that had both been shortcircuited in each self coupling of Traction networks section n and locate.To contact line or the negative feeder F of the self coupling section n of the fault that is judged to be shortcircuited, trend value of symbol as its one end is 0 (namely this end does not have electric current to flow through), then can judge that contact line T or negative feeder F is at this end generation disconnection fault, and be shortcircuited fault at the other end.
Obviously, the method for operation of this example and step can be applicable to the single line AT Traction networks situation of Fig. 1, also can be applicable to the situation of the parallel connection of multiple line AT Traction networks end and the full Parallel AT Traction networks of multiple line.
Claims (1)
1. electric railway AT Traction networks fault distinguishing and a guard method, the steps include:
The negative feeder magnitude of voltage that the contact line magnitude of voltage that the contact line T voltage to earth instrument transformer that A, measurement and control center's realtime synchronization gather each autotransformer ATn place detects, negative feeder F voltage to earth instrument transformer detect, wherein n is the sequence number of self coupling section, n=1,2,3 ..., N; When all contact line magnitudes of voltage, negative feeder magnitude of voltage are all more than or equal to setting, then judge that Traction networks is not shortcircuited fault, does not take protection act to Traction networks; Otherwise, carry out the operation of following steps;
B, measurement and control center's realtime synchronization gather near, farend current value ITna, ITnb of the contact line T that the current transformer that is near, farend of contact line T in each self coupling section n detects, and realtime synchronization gathers near, farend current value IFna, the IFnb of the negative feeder F that the current transformer that is near, farend of negative feeder F detects in each self coupling section n; According near, farend current value ITna, ITnb of each self coupling section contact line T, near, farend current value IFna, IFnb of each self coupling section negative feeder F, measurement and control center's realtime judge goes out that each self coupling section n contact line T is near, farend and negative feeder F is near, the direction of tide of farend, and the trend value of symbol of inflow direction is demarcated as 1, flows out that the trend value of symbol in direction is demarcated as1, unloaded trend value of symbol is demarcated as 0;
If C has, contact line T in self coupling section n' is near, the trend value of symbol of farend be more than or equal to 1 with the absolute value of value, but in this self coupling section n' near, the farend of negative feeder F trend value of symbol be less than 1 with the absolute value of value, then measurement and control center judges to come in contact net T shorted to earth fault in this self coupling section n', makes the contact line circuit breaker KT at this self coupling section n' two ends
_{n'}a, KT
_{n'}b separating brake, then overlap, successful reclosing, then recover normal;
Reclosing failure, then make that this self coupling section n' is near, the contact line circuit breaker KT of farend
_{n'}a, KT
_{n'}b and negative feeder circuit breaker KF
_{n'}a, KF
_{n'}b is separating brake together; Meanwhile, one end that this self coupling section n' is near, farend short circuit currents is larger is selected by measurement and control center, and by the autotransformer AT nearest with this end
_{n'}or AT
_{(n'+1)}the contact line magnitude of voltage at place and this end current value of contact line calculate shortcircuit reactance, and the contact line T of this self coupling section n' and total reactance in rail loop, then show that short circuit trouble point is apart from this autotransformer AT by the length that the ratio of shortcircuit reactance and this total reactance is multiplied by this self coupling section n'
_{n'}or AT
_{(n'+1)}distance;
If D has, negative feeder F in self coupling section n' is near, the trend value of symbol of farend be more than or equal to 1 with the absolute value of value, but in this self coupling section n' near, the farend of contact line T trend value of symbol be less than 1 with the absolute value of value, then measurement and control center judges negative feeder F shorted to earth fault occurs in this self coupling section n', makes the negative feeder circuit breaker KF at this self coupling section n' two ends
_{n'}a, KF
_{n'}b separating brake, then overlap, successful reclosing, then recover normal;
Reclosing failure, then make that this self coupling section n' is near, the negative feeder circuit breaker KF of farend
_{n'}a, KF
_{n'}b and contact line circuit breaker KT
_{n'}a, KT
_{n'}b is separating brake together; Meanwhile, one end that this self coupling section n' is near, farend short circuit currents is larger is selected by measurement and control center, and by the autotransformer AT nearest with this end
_{n'}or AT
_{(n'+1)}the negative feeder magnitude of voltage at place and this end current value of negative feeder calculate shortcircuit reactance, and the negative feeder F of this self coupling section n' and total reactance in rail loop, then show that short circuit trouble point is apart from this autotransformer AT by the length that the ratio of shortcircuit reactance and this total reactance is multiplied by this self coupling section n'
_{n'}or AT
_{(n'+1)}distance;
If E has, contact line T in self coupling section n' is near, the trend value of symbol of farend be more than or equal to 1 with the absolute value of value and in this self coupling section n' negative feeder F closely, the trend value of symbol of farend be also more than or equal to 1 with the absolute value of value, then measurement and control center judges to come in contact in this self coupling section n' net T to negative feeder F short trouble, or comes in contact net T and negative feeder F short trouble over the ground simultaneously; Measurement and control center makes the contact line circuit breaker KT at this self coupling section n' two ends
_{n'}a, KT
_{n'}b and negative feeder circuit breaker KF
_{n'}a, KF
_{n'}the equal separating brake of b, then overlap, successful reclosing, then recover normal;
Reclosing failure, then make that this self coupling section n' is near, the contact line circuit breaker KT of farend
_{n'}a, KT
_{n'}b and negative feeder circuit breaker KF
_{n'}a, KF
_{n'}b is separating brake again; Meanwhile, one end that this self coupling section n' is near, farend short circuit currents is larger is selected by measurement and control center, and by the autotransformer AT nearest with this end
_{n'}or AT
_{(n'+1)}this end current value of the contact line magnitude of voltage located, negative feeder magnitude of voltage and contact line calculates shortcircuit reactance, and total reactance in contact line T and negative feeder F loop in this self coupling section n', then show that short circuit trouble point is apart from this autotransformer AT by the length that the ratio of shortcircuit reactance and this total reactance is multiplied by this self coupling section n'
_{n'}or AT
_{(n'+1)}distance.
Priority Applications (1)
Application Number  Priority Date  Filing Date  Title 

CN201210453581.5A CN103151763B (en)  20120928  20121113  A kind of electric railway AT Traction networks fault distinguishing and guard method 
Applications Claiming Priority (4)
Application Number  Priority Date  Filing Date  Title 

CN201210372419.0  20120928  
CN2012103724190  20120928  
CN201210372419  20120928  
CN201210453581.5A CN103151763B (en)  20120928  20121113  A kind of electric railway AT Traction networks fault distinguishing and guard method 
Publications (2)
Publication Number  Publication Date 

CN103151763A CN103151763A (en)  20130612 
CN103151763B true CN103151763B (en)  20150805 
Family
ID=48547683
Family Applications (3)
Application Number  Title  Priority Date  Filing Date 

CN201210453729.5A Active CN103149498B (en)  20120928  20121113  The charged train operation state of electric railway AT Traction networks and position identifying method 
CN201210454398.7A Active CN103149489B (en)  20120928  20121113  A kind of electric railway AT Traction networks broken string method of discrimination 
CN201210453581.5A Active CN103151763B (en)  20120928  20121113  A kind of electric railway AT Traction networks fault distinguishing and guard method 
Family Applications Before (2)
Application Number  Title  Priority Date  Filing Date 

CN201210453729.5A Active CN103149498B (en)  20120928  20121113  The charged train operation state of electric railway AT Traction networks and position identifying method 
CN201210454398.7A Active CN103149489B (en)  20120928  20121113  A kind of electric railway AT Traction networks broken string method of discrimination 
Country Status (1)
Country  Link 

CN (3)  CN103149498B (en) 
Families Citing this family (24)
Publication number  Priority date  Publication date  Assignee  Title 

CN103754240B (en) *  20140117  20160817  北京交通大学  A kind of method for detecting position and position sensor 
CN104597374B (en) *  20141226  20170627  中铁第四勘察设计院集团有限公司  A kind of failure judgment method for the Tshaped power supply of traction network 
CN105425113B (en) *  20151222  20191203  中国神华能源股份有限公司  Contact network fault positioning method and system 
CN105652152B (en) *  20151231  20190222  缪弼东  A kind of Fault Locating Method and system of multiple line direct supply system contact net 
CN107433883B (en) *  20160525  20200407  四川艾德瑞电气有限公司  Railway traction power supply arm integrated monitoring system 
CN109142964B (en) *  20170616  20210205  国电南瑞科技股份有限公司  Fixed value automatic setting method of highspeed railway fault distance measuring device 
CN108490292B (en) *  20180321  20200818  中铁第四勘察设计院集团有限公司  Train running section online monitoring method and system 
CN108872786B (en) *  20180615  20190802  西南交通大学  A kind of electric railway AT Traction networks AT segment fault localization method 
CN109031047B (en) *  20180824  20230505  西南交通大学  Fault detection device and method for electrified railway AT station 
CN109347070B (en) *  20180930  20201023  成都交大许继电气有限责任公司  State measurement and control protection system suitable for highspeed railway traction network 
CN109950862B (en) *  20181122  20210129  深圳供电局有限公司  Selfadaptive current fixed value setting method 
CN110208653A (en) *  20190620  20190906  西南交通大学  A kind of electric railway perforation tractive power supply system and its fault section recognition methods 
CN110244182B (en) *  20190628  20210518  国电南瑞南京控制系统有限公司  Fault positioning method and system suitable for electrified railway multibranch line 
CN111391893B (en) *  20200227  20210511  北京交通大学  Subway train position detection system 
CN111391894B (en) *  20200227  20210511  北京交通大学  Subway train position detection system 
CN111579925B (en) *  20200521  20211008  西南交通大学  Positive rail ground fault positioning method of fourth rail backflow traction power supply system 
CN111707906B (en) *  20200714  20210803  广州地铁集团有限公司  Method for realizing fault location of subway directcurrent traction power supply system 
CN112034393B (en) *  20200820  20231027  北京瑞凯软件科技开发有限公司  Breakpoint diagnosis method and system for main circuit of power supply of overhead contact system 
CN112350326B (en) *  20201023  20230811  株洲中车时代电气股份有限公司  Rail transit traction power supply system, control method and system thereof and related components 
CN112946420B (en) *  20210129  20211123  西南交通大学  Method for identifying fault position of AT section of electrified railway 
CN113071538B (en) *  20210428  20211210  西南交通大学  Method and system for identifying train running direction of singleline AT traction network 
CN113479117B (en) *  20210908  20211123  西南交通大学  System and method for identifying train running state of distributed power generation traction network 
CN114475370B (en) *  20220314  20230407  西南交通大学  Short circuit sectional protection method for contact network of cable through power supply system 
CN114689992B (en) *  20220407  20230428  西南交通大学  Traction network fault position calibration method 
Citations (1)
Publication number  Priority date  Publication date  Assignee  Title 

CN201327523Y (en) *  20081107  20091014  成都交大许继电气有限责任公司  Fault location device for allparallel AT power supply mode in highspeed electrified railway 
Family Cites Families (8)
Publication number  Priority date  Publication date  Assignee  Title 

JP3942137B2 (en) *  20000718  20070711  中部電力株式会社  Transmission line protection device 
JP3844757B2 (en) *  20031104  20061115  株式会社近計システム  Feeder fault location system 
JP4745000B2 (en) *  20050916  20110810  株式会社東芝  Fault detection device for fault location device for AC AT feeder circuit 
JP4693564B2 (en) *  20050916  20110601  株式会社東芝  Fault location device for AC AT feeder circuit 
CN101404409B (en) *  20081117  20110810  国电南瑞科技股份有限公司  Cutoff ground fault recognition method for electrified railroad AT power supply contact system 
JP5319503B2 (en) *  20091130  20131016  独立行政法人鉄道建設・運輸施設整備支援機構  AC AT feeder circuit protection device and method 
CN201819966U (en) *  20100809  20110504  广州锐翔电力科技有限公司  Railway contact network linebreaking prevention proximity warning indicator 
CN102508113B (en) *  20111021  20131113  南京南瑞继保电气有限公司  Data collection synchronous method of electrical railway distance measurement device 

2012
 20121113 CN CN201210453729.5A patent/CN103149498B/en active Active
 20121113 CN CN201210454398.7A patent/CN103149489B/en active Active
 20121113 CN CN201210453581.5A patent/CN103151763B/en active Active
Patent Citations (1)
Publication number  Priority date  Publication date  Assignee  Title 

CN201327523Y (en) *  20081107  20091014  成都交大许继电气有限责任公司  Fault location device for allparallel AT power supply mode in highspeed electrified railway 
NonPatent Citations (3)
Title 

一种牵引网故障定位的新方法;钱澄浩等;《电力系统保护与控制》;20120201;第40卷(第3期);第2125、30页 * 
全并联AT供电牵引网故障测距方案的研究;王斌等;《电气化铁道》;20060531(第5期);第58页 * 
全并联AT供电牵引网短路故障分析;王继芳等;《电气化铁道》;20050430(第4期);第2023页 * 
Also Published As
Publication number  Publication date 

CN103149489B (en)  20150930 
CN103149489A (en)  20130612 
CN103151763A (en)  20130612 
CN103149498A (en)  20130612 
CN103149498B (en)  20150805 
Similar Documents
Publication  Publication Date  Title 

CN103151763B (en)  A kind of electric railway AT Traction networks fault distinguishing and guard method  
EP3216644B1 (en)  Distributed protection system for power supply at sections of electrified railway propulsion system  
CN103311910B (en)  A kind of DC traction powersupply system and guard method  
CN109347093B (en)  Power distribution network selfhealing control method combining master station with local control  
CN105226621B (en)  A kind of distribution type fiberoptic longitudinal difference protection system suitable for highspeed railway  
CN103326334B (en)  A kind of thyristor rectifier tractive power supply system and guard method  
CN110606000B (en)  Contact net shortcircuit protection system and method of through type inphase power supply system  
CN202944220U (en)  Segmental power supply and protection system of autotransformer (AT) traction power network of electrified railway  
CN103715670B (en)  A kind of highspeed railway supply arm connection based on impedance characteristic is jumped guard method  
CN106684841A (en)  Flexible directcurrent grid system directcurrent shortcircuit fault protection method and device  
CN110605999B (en)  Measurement and control protection system and method for through type inphase power supply network  
CN101364727B (en)  Overvoltage inhibiting apparatus for traction powersupply system in process of vehicle passing through phase breaking  
CN107895940A (en)  A kind of method for limiting transformer station's 220KV short circuit currents  
CN202623973U (en)  Sectional twisting autotransformer station  
CN105691244B (en)  A kind of system zero load monitoring method of electric railway insertion power supply  
CN203445606U (en)  Direct current traction power supply system  
CN203039357U (en)  Section power supply and state measurement and control apparatus for parallel traction net at end of doubleline railway  
CN204741270U (en)  Transformer neutral point direct current isolating device  
CN108909541B (en)  Power supply structure for AT of electrified railway  
CN110672972A (en)  Fault positioning and isolating method for flexible direct current distribution network  
CN205395812U (en)  Electric Railway link up unloaded monitoring device of system of power supply  
CN103208787A (en)  Mixed line selfadaption reclosing based on fault direction distinguishing principle  
CN103545799A (en)  Circuit differential protection method automatically adapting to external bridge circuit  
CN109842204A (en)  Standby heat line electricity source based on opticalfibre channel controls input of spare power supply method  
CN202997535U (en)  Electrified railway autotransformer station main wiring 
Legal Events
Date  Code  Title  Description 

C06  Publication  
PB01  Publication  
C10  Entry into substantive examination  
SE01  Entry into force of request for substantive examination  
C14  Grant of patent or utility model  
GR01  Patent grant  
C41  Transfer of patent application or patent right or utility model  
TR01  Transfer of patent right 
Effective date of registration: 20160622 Address after: 610031 Sichuan City, Chengdu Province, No. two North Ring Road, No. 111 Patentee after: Southwest Jiaotong University Patentee after: Li Qunzhan Address before: 610031 Sichuan City, Chengdu Province, No. two North Ring Road, No. 111 Patentee before: Southwest Jiaotong University 