CN110806526A - Fault location method under traction power supply system feeder circuit breaker 1-with-2 mode - Google Patents

Fault location method under traction power supply system feeder circuit breaker 1-with-2 mode Download PDF

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CN110806526A
CN110806526A CN201911087248.5A CN201911087248A CN110806526A CN 110806526 A CN110806526 A CN 110806526A CN 201911087248 A CN201911087248 A CN 201911087248A CN 110806526 A CN110806526 A CN 110806526A
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current
substation
fault
feeder
circuit breaker
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CN110806526B (en
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周小金
葛海波
范红疆
刘晃
万宇
周宇
彭绿萍
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CHENGDU SOUTHWEST JIAOTONG UNIVERSITY XUJI ELECTRIC Co Ltd
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CHENGDU SOUTHWEST JIAOTONG UNIVERSITY XUJI ELECTRIC Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/088—Aspects of digital computing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52—Outage or fault management, e.g. fault detection or location

Abstract

The invention discloses a fault location method under a traction power supply system feeder circuit breaker 1 with 2 mode, wherein the traction power supply system feeder circuit breaker 1 with 2 mode is as follows: the uplink and the downlink of the substation share one feeder circuit breaker; the fault location method comprises the following steps: and step S1: collecting data of the AT station and the subarea station, and then judging whether the current fault section is between the power substation and the AT station or between the AT station and the subarea station according to the data of the AT station and the subarea station; and step S2: if the current fault section is between the substation and the AT station, calculating the fault distance by adopting an uplink-downlink current ratio principle, and calculating the fault distance l by adopting a formula (1):
Figure DDA0002265795740000011

Description

Fault location method under traction power supply system feeder circuit breaker 1-with-2 mode
Technical Field
The invention relates to railway distance measurement, in particular to a fault distance measurement method in a mode of a feeder circuit breaker 1 with a circuit 2 of a traction power supply system.
Background
At present, the economic development is advanced, the railway is moving towards the direction of high speed and heavy load, and the construction of the high-speed railway meets the requirements of the economic development and the national conditions of China. The high-speed railway must adopt electric traction, a power supply system is taken as an important component of the electrified railway, and the selection of the power supply mode becomes one of the key factors for developing the high-speed railway. The AT power supply mode has been widely applied in France, Japan and other countries with its own advantages, and is also more and more concerned by the railway department in China.
The high-speed railway power supply traction network in China adopts a full parallel AT power supply mode. And a full parallel AT power supply mode is adopted, so that higher requirements are provided for more reasonable protection configuration and more accurate fault location of a traction power supply system. When a traction network fails, a distance measuring device AT three places of a substation, an AT place and a subarea place is generally adopted to synchronously collect fault bus voltage, feeder line current, AT absorption current and the like, and finally, an AT absorption current ratio distance measuring principle is adopted to position a fault point AT the substation.
In the ranging process, there are many special situations, for example, when the high-speed railway power supply traction network is not put into formal operation or a certain maintenance state after the formal operation, there may be some special operation modes, for example, the uplink and downlink traction networks in the subareas are not in parallel. The existing technology cannot solve the fault location under the special operation mode.
Thus, there are patent publication nos: CN 103592573B; the prior art researches a fault location method that an uplink traction network and a downlink traction network of a subarea location are not in a parallel state, and the technology uses T line current of a downlink feeder line of a substation, F line current of a downlink feeder line of the substation, T line current of an uplink feeder line of the substation and F line current of an uplink feeder line of the substation as necessary input parameters and then uses an uplink-downlink current ratio fault location principle to perform distance location. In summary, the technology utilizes the parameters of the uplink feeder and the downlink feeder of the substation to calculate the distance measurement.
However, in some more special cases, for example, when the uplink and the downlink of the substation share one feeder breaker, because the feeder shares the uplink or the downlink path for supplying power at this time, there is a failure of either the uplink path line or the downlink path, and therefore, the parameter of the uplink and the downlink feeder of the substation cannot be used for performing the uplink and downlink current ratio fault location at this time. Therefore, the prior art cannot solve the problem of fault location in the special rising operation mode.
Disclosure of Invention
The invention aims to provide a fault distance measurement method under a mode that a feeder circuit breaker 1 of a traction power supply system is provided with a circuit breaker 2, which aims to solve the technical problem that the traditional fault calculation based on the current ratio between the uplink and the downlink of a power substation cannot be realized when the uplink and the downlink of the power substation share one feeder circuit breaker.
The invention is realized by the following technical scheme:
the fault location method under the mode that the feeder circuit breaker 1 of the traction power supply system is provided with 2 comprises the following steps that when an uplink and a downlink of a substation share one feeder circuit breaker, namely, the mode that the feeder circuit breaker 1 of the traction power supply system is provided with 2:
and step S1: judging the area of the current fault section, and if the area of the current fault section is between the substation and the AT station, executing the step S2;
and step S2: calculating the fault distance by using the current ratio of AT as a target and adopting the principle of the uplink-downlink current ratio, and calculating the fault distance l by adopting a formula (1):
Figure BDA0002265795720000021
in the formula (1), IKX0As a substation assemblyFeeder current, IKX1For the current supplied to AT, D0Is the distance from the substation to the AT substation, L is the relative distance from the substation to the fault point, L1Length, L, of power supply line for substation3Length of power supply line L for ATT1Equivalent length of power supply line, L, for substationT3Equivalent length of power supply line, L, for ATTKLQ0Equivalent length, L, of anti-lightning ring of substationTKLQ1The equivalent length of the lightning coil resisted by the AT.
Further scheme: if the area of the current fault section is between the partitions of the AT, the method further comprises the step S3;
and step S3: calculating the fault distance by adopting a transverse current ratio principle, and calculating the fault distance l by adopting a formula (2):
Figure BDA0002265795720000022
in the formula (2), IHL1Current, I, cross-linked by ATHL2Is a cross-linked current, D0Distance from substation to AT, D1Is the distance from AT station to subarea station, L is the relative distance from substation to fault point, L3Length of power supply line L for AT5Length of power supply line for subarea, LT3Equivalent length of power supply line, L, for ATT5For partitioning the equivalent length, L, of the supplied lineTKLQ1Equivalent length, L, of the lightning ring for ATTKLQ2The equivalent length of the lightning coil resisted by the subarea.
Further, when the formula (1) calculates the fault distance l, the feeder line current I of the subarea is adoptedKX2To the main feeder current I of the substationKX0And (5) correcting: the resulting formula (1.1) is:
Figure BDA0002265795720000023
formula (1), (1, 1) formula (2) whereinKX0Is the main feeder current of the substation, IKX1For the supply current of AT, IHL1Current, I, cross-linked by ATHL2Is a cross-linked current, D0From substation to AT stationDistance of (D)1Is the distance from AT station to subarea station, L is the relative distance from substation to fault point, L1Length, L, of power supply line for substation3Length of power supply line L for AT5Length of power supply line for subarea, LT1Equivalent length of power supply line, L, for substationT3Equivalent length of power supply line, L, for ATT5For partitioning the equivalent length, L, of the supplied lineTKLQ0Equivalent length, L, of anti-lightning ring of substationTKLQ1Equivalent length, L, of the lightning ring for ATTKLQ2The equivalent length of the lightning coil resisted by the subarea.
The design principle of the invention is as follows: when the uplink and the downlink of the substation share one feeder circuit breaker, the uplink and downlink current ratio fault location cannot be carried out by using the parameters of the uplink and the downlink feeders of the substation. In theory, when the current fault section is between the substation and the AT station, the fault point can be calculated from the substation to the fault point direction, or from the AT station to the fault point direction (the calculation direction considered by the present invention). The method takes the AT as a visual angle, namely the AT is taken as an initial measuring point, the direction from the AT to the substation is taken as a fault target direction, the current ratio of the AT is taken as a target, and the fault distance is calculated by adopting the principle of the current ratio between the uplink and the downlink, so that a novel and ingenious distance measurement concept is provided for measuring faults when the uplink and the downlink of the substation share one feeder circuit breaker.
Therefore, in the present invention, the fault distance l is calculated using formula (1):
Figure BDA0002265795720000031
in this formula: i isKX0Is the main feeder current of the substation, IKX1The feeder current of the AT station is the feeder current of the AT station, wherein, the current flowing through the feeder circuit breaker 1 in the AT station is the total feeder current of the AT station. The calculated view is calculated for the view taken by the station AT. In the above formula, the influence of factors such as a lightning coil is also taken into consideration. Therefore, the influence of some elements needs to be consideredAnd (6) processing.
Meanwhile, when the fault section is between the subareas where the AT is located, the traditional distance measurement method utilizes a reactance method to measure the distance, and in the invention, the transverse current of the AT is adopted to calculate by utilizing the principle of transverse current ratio.
Furthermore, the invention does not adopt the feeder current I of the subareaKX2To the main feeder current I of the substationKX0After correction, through the practical experiment of the invention, the error can be measured within 300m when the fault distance is generally measured, and the feeder current I is obtained through the adoption of the subareasKX2To the main feeder current I of the substationKX0Making a correction, i.e. using IKX0-IKX2Calculated as denominator such that IKX0After being corrected, the error of measurement can be within 100m when the fault distance is measured generally through the practical experiment of the invention. It can thus be seen that for the purposes of the present invention, I can be usedKX0Without correction of the calculation, it is also possible to use the sectionalised feed line currents IKX2To the main feeder current I of the substationKX0And performing correction calculation. But the latter has a higher measurement accuracy. Preferably, therefore, the formula (1) uses the sectored feeder currents I when calculating the fault distance IKX2To the main feeder current I of the substationKX0And (5) correcting: the resulting formula (1.1) is:
Figure BDA0002265795720000041
to visualize the above theory, the present invention provides the following 2 specific cases:
case 1: taking the breaker 1QF open and breaker 2QF close of the substation as an example:
the feeder circuit breaker shared by the uplink and the downlink of the substation is specifically as follows: a collinear branch is adopted between the substation and the AT to conduct an uplink feeder and a downlink feeder, a disconnecting switch QS0 is arranged on the collinear branch, when the uplink and the downlink of the substation share one feeder circuit breaker, a circuit breaker 1QF of the substation is disconnected, a circuit breaker 2QF is closed, a disconnecting switch QS0 on the collinear branch is closed, and a circuit breaker 3QF of the AT, a circuit breaker 4QF and a disconnecting switch QS1 are closed; the circuit breakers 5QF, 6QF and QS2 of the subareas are closed; autotransformers AT1 and AT2 of the AT, AT3 and AT4 of the subarea are all put into the system;
at this time, the IKX1Is the | I of AT stationT1-IF1I or I of ATT2-IF2|，IKX2Is the | I of a partitionT1-IF1I or I of a partitionT2-IF2I, the IKX0Is | I of a substationT1-IF1| I of | + substationT2-IF2I of the substation at this timeT1-IF1|＝0；
IT1For the current, I, of the T line of the down feederF1F line current for the downlink feeder;
IT2for the current of the T-line of the up-feederF2Is the uplink feeder F-line current.
Case 2: taking the breaker 2QF disconnection and breaker 1QF closing position of the substation as an example:
the feeder circuit breaker shared by the uplink and the downlink of the substation is specifically as follows: a collinear branch is adopted between the substation and the AT to conduct an uplink feeder and a downlink feeder, a disconnecting switch QS0 is arranged on the collinear branch, when the uplink and the downlink of the substation share one feeder circuit breaker, a circuit breaker 2QF of the substation is disconnected, a circuit breaker 1QF is closed, a disconnecting switch QS0 on the collinear branch is closed, and a circuit breaker 3QF of the AT, a circuit breaker 4QF and a disconnecting switch QS1 are closed; the circuit breakers 5QF, 6QF and QS2 of the subareas are closed; autotransformers AT1 and AT2 of the AT, AT3 and AT4 of the subarea are all put into the system;
at this time, the IKX1Is the | I of AT stationT1-IF1I or I of ATT2-IF2|，IKX2Is the | I of a partitionT1-IF1I or I of a partitionT2-IF2I, the IKX0Is | I of a substationT1-IF1| I of | + substationT2-IF2I of the substation at this timeT2-IF2|＝0；
IT1For the current, I, of the T line of the down feederF1F line current for the downlink feeder;
IT2for the current of the T-line of the up-feederF2Is the uplink feeder F-line current.
The specific method for judging the current fault section comprises the following steps:
calculating the cross current of the AT and the cross current of the subareas, wherein when the cross current of the subareas is the maximum, the fault interval is between the AT and the subareas; when the cross current of the AT station is maximum, if the cross current of the sub-area/the cross current of the AT station is larger than m, and m is a cross current ratio correction coefficient, the fault section is between the AT station and the sub-area, otherwise, the fault section is between the substation and the AT station.
The value range of m is 0.97 to 1.03.
The fault type judgment is needed to be completed before fault location or after fault location,
the fault type judgment specifically comprises the following steps:
m1 step: comparing the maximum current absorbed by the upper substation of the power supply arm, the AT substation and the subarea substation with a parameter 'TF fault current', if the maximum current absorbed is less than the 'TF fault current', judging that the fault type is TF fault, otherwise, judging that the fault type is non-TF fault, and switching to the step M2 for processing when the fault type is non-TF fault;
m2 step: when the fault type is a non-TF fault, according to 4 paths of currents corresponding to the maximum current of the current: i isT1、IF1、IT2、IF2Determining the type of fault, IT1Or IT2The maximum value is T-type fault; i isF1Or IF2Maximum, then F-type failure, IT1、IT2Is a T-line current, IF1、IF2Is the F-line current.
Compared with the prior art, the invention has the following advantages and beneficial effects: the problem that the existing fault location system cannot locate the distance of the operation mode that the uplink and the downlink of the traction substation share one feeder circuit breaker is solved, meanwhile, the fault type of the uplink and the downlink of the fault can be accurately judged, the correct fault distance is given, the fault point is quickly found, and the rapid power restoration of a high-speed railway power supply traction network can be ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic circuit diagram of a 2QF common to upstream and downstream of a traction substation.
Fig. 2 is a schematic circuit diagram when the uplink and the downlink of the traction substation share 1 QF.
Fig. 3 is a schematic diagram of the current when the uplink and the downlink of the traction substation share 2 QF.
Fig. 4 is a schematic diagram of the current when the uplink and the downlink of the traction substation share 1 QF.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
As shown in figures 1 and 2 of the drawings,
the fault location method under the mode that the feeder circuit breaker 1 of the traction power supply system is provided with 2 comprises the following steps that when an uplink and a downlink of a substation share one feeder circuit breaker, namely, the mode that the feeder circuit breaker 1 of the traction power supply system is provided with 2:
and step S1: judging the area of the current fault section, and if the area of the current fault section is between the substation and the AT station, executing the step S2;
and step S2: calculating the fault distance by using the current ratio of AT as a target and adopting the principle of the uplink-downlink current ratio, and calculating the fault distance l by adopting a formula (1):
Figure BDA0002265795720000061
in the formula (1), IKX0Is the main feeder current of the substation, IKX1For the current supplied to AT, D0Is the distance from the substation to the AT substation, l is the phase from the substation to the fault pointTo distance, L1Length, L, of power supply line for substation3Length of power supply line L for ATT1Equivalent length of power supply line, L, for substationT3Equivalent length of power supply line, L, for ATTKLQ0Equivalent length, L, of anti-lightning ring of substationTKLQ1The equivalent length of the lightning coil resisted by the AT.
Further, if the area of the current fault section is between the partitions of the AT, the method further includes step S3;
and step S3: calculating the fault distance by adopting a transverse current ratio principle, and calculating the fault distance l by adopting a formula (2):
Figure BDA0002265795720000062
in the formula (2), IHL1Current, I, cross-linked by ATHL2Is a cross-linked current, D0Distance from substation to AT, D1Is the distance from AT station to subarea station, L is the relative distance from substation to fault point, L3Length of power supply line L for AT5Length of power supply line for subarea, LT3Equivalent length of power supply line, L, for ATT5For partitioning the equivalent length, L, of the supplied lineTKLQ1Equivalent length, L, of the lightning ring for ATTKLQ2The equivalent length of the lightning coil resisted by the subarea.
The design principle of the invention is as follows: when the uplink and the downlink of the substation share one feeder circuit breaker, the uplink and downlink current ratio fault location cannot be carried out by using the parameters of the uplink and the downlink feeders of the substation. In theory, when the current fault section is between the substation and the AT station, the fault point can be calculated from the substation to the fault point direction, or from the AT station to the fault point direction (the calculation direction considered by the present invention). The method takes the AT as a visual angle, namely the AT is taken as an initial measuring point, the direction from the AT to the substation is taken as a fault target direction, the current ratio of the AT is taken as a target, and the fault distance is calculated by adopting the principle of the current ratio between the uplink and the downlink, so that a novel and ingenious distance measurement concept is provided for measuring faults when the uplink and the downlink of the substation share one feeder circuit breaker.
Therefore, in the present invention, the fault distance l is calculated using formula (1):
Figure BDA0002265795720000063
in this formula: i isKX0Is the main feeder current of the substation, IKX1The feeder current of the AT station is the feeder current of the AT station, wherein, the current flowing through the feeder circuit breaker 1 in the AT station is the total feeder current of the AT station. The calculated view is calculated for the view taken by the station AT. In the above formula, the influence of factors such as a lightning coil is also taken into consideration. Therefore, some factors need to be considered.
Meanwhile, when the fault section is between the subareas where the AT is located, the traditional distance measurement method utilizes a reactance method to measure the distance, and in the invention, the transverse current of the AT is adopted to calculate by utilizing the principle of transverse current ratio.
Example 2:
on the basis of the above embodiments, further, the present invention does not adopt the feeder current I of the subareasKX2To the main feeder current I of the substationKX0After correction, through the practical experiment of the invention, the error can be measured within 300m when the fault distance is generally measured, and the feeder current I is obtained through the adoption of the subareasKX2To the main feeder current I of the substationKX0Making a correction, i.e. using IKX0-IKX2Calculated as denominator such that IKX0After being corrected, the error of measurement can be within 100m when the fault distance is measured generally through the practical experiment of the invention. It can thus be seen that for the purposes of the present invention, I can be usedKX0Without correction of the calculation, it is also possible to use the sectionalised feed line currents IKX2To the main feeder current I of the substationKX0And performing correction calculation. But the latter has a higher measurement accuracy. Preferably, therefore, the formula (1) uses the sectored feeder currents I when calculating the fault distance IKX2To the main feeder current I of the substationKX0And (5) correcting: the resulting formula (1.1) is:
Figure BDA0002265795720000071
example 3:
on the basis of the above embodiment 1, preferably, in order to visualize the above theory, the present invention provides the following 2 specific cases:
as shown in fig. 1 and 3, case 1: taking the breaker 1QF open and breaker 2QF close of the substation as an example:
the feeder circuit breaker shared by the uplink and the downlink of the substation is specifically as follows: a collinear branch is adopted between the substation and the AT to conduct an uplink feeder and a downlink feeder, a disconnecting switch QS0 is arranged on the collinear branch, when the uplink and the downlink of the substation share one feeder circuit breaker, a circuit breaker 1QF of the substation is disconnected, a circuit breaker 2QF is closed, a disconnecting switch QS0 on the collinear branch is closed, and a circuit breaker 3QF of the AT, a circuit breaker 4QF and a disconnecting switch QS1 are closed; the circuit breakers 5QF, 6QF and QS2 of the subareas are closed; autotransformers AT1 and AT2 of the AT, AT3 and AT4 of the subarea are all put into the system;
at this time, the IKX1Is the | I of AT stationT1-IF1I or I of ATT2-IF2|，IKX2Is the | I of a partitionT1-IF1I or I of a partitionT2-IF2I, the IKX0Is | I of a substationT1-IF1| I of | + substationT2-IF2I of the substation at this timeT1-IF1|＝0；
IT1For the current, I, of the T line of the down feederF1F line current for the downlink feeder;
IT2for the current of the T-line of the up-feederF2Is the uplink feeder F-line current.
As shown in fig. 2 and 4, case 2: taking the breaker 2QF disconnection and breaker 1QF closing position of the substation as an example:
the feeder circuit breaker shared by the uplink and the downlink of the substation is specifically as follows: a collinear branch is adopted between the substation and the AT to conduct an uplink feeder and a downlink feeder, a disconnecting switch QS0 is arranged on the collinear branch, when the uplink and the downlink of the substation share one feeder circuit breaker, a circuit breaker 2QF of the substation is disconnected, a circuit breaker 1QF is closed, a disconnecting switch QS0 on the collinear branch is closed, and a circuit breaker 3QF of the AT, a circuit breaker 4QF and a disconnecting switch QS1 are closed; the circuit breakers 5QF, 6QF and QS2 of the subareas are closed; autotransformers AT1 and AT2 of the AT, AT3 and AT4 of the subarea are all put into the system;
at this time, the IKX1Is the | I of AT stationT1-IF1I or I of ATT2-IF2|，IKX2Is the | I of a partitionT1-IF1I or I of a partitionT2-IF2I, the IKX0Is | I of a substationT1-IF1| I of | + substationT2-IF2I of the substation at this timeT2-IF2|＝0；
IT1For the current, I, of the T line of the down feederF1F line current for the downlink feeder;
IT2for the current of the T-line of the up-feederF2Is the uplink feeder F-line current.
The specific method for judging the current fault section comprises the following steps:
calculating the cross current of the AT and the cross current of the subareas, wherein when the cross current of the subareas is the maximum, the fault interval is between the AT and the subareas; when the cross current of the AT station is maximum, if the cross current of the sub-area/the cross current of the AT station is larger than m, and m is a cross current ratio correction coefficient, the fault section is between the AT station and the sub-area, otherwise, the fault section is between the substation and the AT station.
The value range of m is 0.97 to 1.03.
The fault type judgment is needed to be completed before fault location or after fault location,
the fault type judgment specifically comprises the following steps:
m1 step: comparing the maximum current absorbed by the upper substation of the power supply arm, the AT substation and the subarea substation with a parameter 'TF fault current', if the maximum current absorbed is less than the 'TF fault current', judging that the fault type is TF fault, otherwise, judging that the fault type is non-TF fault, and switching to the step M2 for processing when the fault type is non-TF fault;
m2 step: when the fault type is a non-TF fault, according to 4 paths of currents corresponding to the maximum current of the current: i isT1、IF1、IT2、IF2Determining the type of fault, IT1Or IT2The maximum value is T-type fault; i isF1Or IF2Maximum, then F-type failure, IT1、IT2Is a T-line current, IF1、IF2Is the F-line current.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (8)

1. The fault location method under the mode of the feeder circuit breaker 1 with 2 of the traction power supply system is characterized in that:
when the mode that an uplink line and a downlink line of a substation share one feeder circuit breaker, namely a mode of a feeder circuit breaker 1 with a circuit breaker 2 of a traction power supply system, the fault distance measuring method comprises the following steps:
and step S1: judging the area of the current fault section, and if the area of the current fault section is between the substation and the AT station, executing the step S2;
and step S2: calculating the fault distance by using the current ratio of AT as a target and adopting the principle of the uplink-downlink current ratio, and calculating the fault distance l by adopting a formula (1):
Figure FDA0002265795710000011
in the formula (1), IKX0Is the main feeder current of the substation, IKX1For the current supplied to AT, D0Is the distance from the substation to the AT substation, L is the relative distance from the substation to the fault point, L1The length of the power supply line of the substation,L3Length of power supply line L for ATT1Equivalent length of power supply line, L, for substationT3Equivalent length of power supply line, L, for ATTKLQ0Equivalent length, L, of anti-lightning ring of substationTKLQ1The equivalent length of the lightning coil resisted by the AT.
2. The method for fault location in a zone 2 mode of a traction power supply system feeder circuit breaker 1 as claimed in claim 1, wherein: if the area of the current fault section is between the partitions of the AT, the method further comprises the step S3;
and step S3: calculating the fault distance by adopting a transverse current ratio principle, and calculating the fault distance l by adopting a formula (2):
Figure FDA0002265795710000012
in the formula (2), IHL1Current, I, cross-linked by ATHL2Is a cross-linked current, D0Distance from substation to AT, D1Is the distance from AT station to subarea station, L is the relative distance from substation to fault point, L3Length of power supply line L for AT5Length of power supply line for subarea, LT3Equivalent length of power supply line, L, for ATT5For partitioning the equivalent length, L, of the supplied lineTKLQ1Equivalent length, L, of the lightning ring for ATTKLQ2The equivalent length of the lightning coil resisted by the subarea.
3. The method for fault location in a zone 2 mode of a traction power supply system feeder circuit breaker 1 as claimed in claim 1, wherein:
when the fault distance l is calculated by the formula (1), the feeder line current I of the subarea is adoptedKX2To the main feeder current I of the substationKX0And (5) correcting: the resulting formula (1.1) is:
Figure FDA0002265795710000013
4. the method for fault location in a zone 2 mode of a traction power supply system feeder circuit breaker 1 as claimed in claim 1, wherein: the feeder circuit breaker shared by the uplink and the downlink of the substation is specifically as follows: a collinear branch is adopted between the substation and the AT to conduct an uplink feeder and a downlink feeder, a disconnecting switch QS0 is arranged on the collinear branch, when the uplink and the downlink of the substation share one feeder circuit breaker, a circuit breaker 1QF of the substation is disconnected, a circuit breaker 2QF is closed, a disconnecting switch QS0 on the collinear branch is closed, and a circuit breaker 3QF of the AT, a circuit breaker 4QF and a disconnecting switch QS1 are closed; the circuit breakers 5QF, 6QF and QS2 of the subareas are closed; autotransformers AT1 and AT2 of the AT, AT3 and AT4 of the subarea are all put into the system;
at this time, the IKX1Is the | I of AT stationT1-IF1I or I of ATT2-IF2|，IKX2Is the | I of a partitionT1-IF1I or I of a partitionT2-IF2I, the IKX0Is | I of a substationT1-IF1| I of | + substationT2-IF2I of the substation at this timeT1-IF1|＝0；
IT1For the current, I, of the T line of the down feederF1F line current for the downlink feeder;
IT2for the current of the T-line of the up-feederF2Is the uplink feeder F-line current.
5. The method for fault location in a zone 2 mode of a traction power supply system feeder circuit breaker 1 as claimed in claim 1, wherein: the feeder circuit breaker shared by the uplink and the downlink of the substation is specifically as follows: a collinear branch is adopted between the substation and the AT to conduct an uplink feeder and a downlink feeder, a disconnecting switch QS0 is arranged on the collinear branch, when the uplink and the downlink of the substation share one feeder circuit breaker, a circuit breaker 2QF of the substation is disconnected, a circuit breaker 1QF is closed, a disconnecting switch QS0 on the collinear branch is closed, and a circuit breaker 3QF of the AT, a circuit breaker 4QF and a disconnecting switch QS1 are closed; the circuit breakers 5QF, 6QF and QS2 of the subareas are closed; autotransformers AT1 and AT2 of the AT, AT3 and AT4 of the subarea are all put into the system;
at this time, the IKX1Is the | I of AT stationT1-IF1I or I of ATT2-IF2|，IKX2Is the | I of a partitionT1-IF1I or I of a partitionT2-IF2I, the IKX0Is | I of a substationT1-IF1| I of | + substationT2-IF2I of the substation at this timeT2-IF2|＝0；
IT1For the current, I, of the T line of the down feederF1F line current for the downlink feeder;
IT2for the current of the T-line of the up-feederF2Is the uplink feeder F-line current.
6. The method for fault location in a zone 2 mode of a traction power supply system feeder circuit breaker 1 as claimed in claim 1, wherein:
the specific method for judging the current fault section comprises the following steps:
calculating the cross current of the AT and the cross current of the subareas, wherein when the cross current of the subareas is the maximum, the fault interval is between the AT and the subareas; when the cross current of the AT station is maximum, if the cross current of the sub-area/the cross current of the AT station is larger than m, and m is a cross current ratio correction coefficient, the fault section is between the AT station and the sub-area, otherwise, the fault section is between the substation and the AT station.
7. The method of fault location in zone 2 mode of a traction power supply system feeder circuit breaker 1 as claimed in claim 6 wherein:
the value range of m is 0.97 to 1.03.
8. The method for fault location in a zone 2 mode of a traction power supply system feeder circuit breaker 1 as claimed in claim 1, wherein:
the fault type judgment is needed to be completed before fault location or after fault location,
the fault type judgment specifically comprises the following steps:
m1 step: comparing the maximum current absorbed by the upper substation of the power supply arm, the AT substation and the subarea substation with a parameter 'TF fault current', if the maximum current absorbed is less than the 'TF fault current', judging that the fault type is TF fault, otherwise, judging that the fault type is non-TF fault, and switching to the step M2 for processing when the fault type is non-TF fault;
m2 step: when the fault type is a non-TF fault, according to 4 paths of currents corresponding to the maximum current of the current: i isT1、IF1、IT2、IF2Determining the type of fault, IT1Or IT2The maximum value is T-type fault; i isF1Or IF2Maximum, then F-type failure, IT1、IT2Is a T-line current, IF1、IF2Is the F-line current.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111610409A (en) * 2020-06-10 2020-09-01 天津凯发电气股份有限公司 Distance measurement method for electric railway AT power supply system
CN111796164A (en) * 2020-07-16 2020-10-20 西南交通大学 Fault location method for full-parallel AT traction network
CN112557832A (en) * 2021-02-24 2021-03-26 西南交通大学 Fault location method for branch direct power supply traction network in full parallel AT power supply mode
CN114089124A (en) * 2021-09-30 2022-02-25 国电南瑞科技股份有限公司 High-speed railway traction power supply contact network disconnection warning method and device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08220176A (en) * 1995-02-17 1996-08-30 Sumitomo Wiring Syst Ltd Diagnostic system failure
CN103592573A (en) * 2013-11-15 2014-02-19 西南交通大学 Fault distance measuring method for non-parallel-state uplink and downlink traction network where partitions are located
CN104316832A (en) * 2014-10-08 2015-01-28 成都交大许继电气有限责任公司 Traction power supply system fault location method applied to multiple operation modes
CN106199331A (en) * 2016-06-29 2016-12-07 成都交大许继电气有限责任公司 The fault recognition method of the full parallel operation system with anti-thunder circle
CN107797027A (en) * 2017-10-16 2018-03-13 西南交通大学 A kind of electric railway AT draws network fault positioning method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08220176A (en) * 1995-02-17 1996-08-30 Sumitomo Wiring Syst Ltd Diagnostic system failure
CN103592573A (en) * 2013-11-15 2014-02-19 西南交通大学 Fault distance measuring method for non-parallel-state uplink and downlink traction network where partitions are located
CN104316832A (en) * 2014-10-08 2015-01-28 成都交大许继电气有限责任公司 Traction power supply system fault location method applied to multiple operation modes
CN106199331A (en) * 2016-06-29 2016-12-07 成都交大许继电气有限责任公司 The fault recognition method of the full parallel operation system with anti-thunder circle
CN107797027A (en) * 2017-10-16 2018-03-13 西南交通大学 A kind of electric railway AT draws network fault positioning method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
GANG LI等: "Short Circuit Impedance Analysis for Novel AT Power Traction Network", 《2012 ASIA-PACIFIC POWER AND ENERGY ENGINEERING CONFERENCE》 *
田峰等: "接触网故障点距离测量方法对比分析", 《铁道技术监督》 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111610409A (en) * 2020-06-10 2020-09-01 天津凯发电气股份有限公司 Distance measurement method for electric railway AT power supply system
CN111796164A (en) * 2020-07-16 2020-10-20 西南交通大学 Fault location method for full-parallel AT traction network
CN111796164B (en) * 2020-07-16 2021-04-13 西南交通大学 Fault location method for full-parallel AT traction network
CN112557832A (en) * 2021-02-24 2021-03-26 西南交通大学 Fault location method for branch direct power supply traction network in full parallel AT power supply mode
CN112557832B (en) * 2021-02-24 2021-05-11 西南交通大学 Fault location method for branch direct power supply traction network in full parallel AT power supply mode
CN114089124A (en) * 2021-09-30 2022-02-25 国电南瑞科技股份有限公司 High-speed railway traction power supply contact network disconnection warning method and device

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