CN108152669A

CN108152669A - The method that high ferro dimension pipe traction substation promotes fault localization precision

Info

Publication number: CN108152669A
Application number: CN201711278377.3A
Authority: CN
Inventors: 吕彦伟; 陈兵杨; 毛祖红
Original assignee: Fifth Engineering Co Ltd of China Railway Construction Electrification Bureau Group Co Ltd
Current assignee: Fifth Engineering Co Ltd of China Railway Construction Electrification Bureau Group Co Ltd
Priority date: 2017-12-06
Filing date: 2017-12-06
Publication date: 2018-06-12
Anticipated expiration: 2037-12-06
Also published as: CN108152669B

Abstract

The present invention relates to the method that a kind of high ferro dimension pipe traction substation promotes fault localization precision, in existing horizontal-associate line current than correcting horizontal-associate line current than telemetry calculation formula and its realization principle after on telemetry basis, installing anti-thunder circle additional；According to fault localization test data during same segments contact net short-circuit test, it takes according to actual fault point, with reference to the horizontal-associate line current after optimization the reactance of circuit unit and anti-thunder circle impedance value are obtained than the method that telemetry principle formula is retrodicted, so as to obtain circuit unit reactance during accurately practical tripping and anti-thunder circle impedance value, make trouble point more accurate in the relative distance of fault section, fault location device is made more accurately to indicate trouble point kilometer post, finally obtains accurate feeder fault locating precision.Technical solution using the present invention, fault localization precision improve, and reach range error less than 400 meters, it is ensured that the safe operation of high ferro power supply unit and high ferro motor-car are started safely.

Description

The method that high ferro dimension pipe traction substation promotes fault localization precision

Technical field

The present invention relates to ultra-high-tension power transmission line fault location technology fields, and in particular to a kind of high ferro ties up pipe traction substation The method for promoting fault localization precision.

Background technology

High ferro integrated automatic system in traction substation is the core equipment of high ferro power supply safety, and fault localization system is it Important component part.Fault localization system is the system of reaction power supply unit trouble point at the first time, to search contact net event Barrier point provides exact position, so as to quick handling failure and restores electricity.The quality of high ferro traction power supply fault localization system is straight Connecing influences the troubleshooting of high ferro electric power system and the speed that restores electricity.

High ferro power supply unit, especially contact net equipment belong to outdoor no stand-by equipment, run by ambient weather environment Influence it is very big, thunderstorm weather causes system-wide power supply unit tripping fault number very more.But China newly opens fortune at present The high ferro line-powered equipment fault localization precision of battalion by a variety of causes such as principle, equipment, parameters because being influenced, and range error is not The accurate requirement that trouble point is provided can be reached.

Expensive 410 kilometers of operation mileages of wide high ferro Nanning office pipeline section, electricity is built after being opened from December 28th, 2014 by Chinese iron The 5th Engineering Co., Ltd's Guilin power supply dimension pipeline section (hereinafter referred to as Guilin power supply dimension pipeline section) of group of gasification office is responsible for power supply unit Operation dimension pipe.Expensive wide high ferro Nanning office pipeline section is located in Guangxi, belongs to subtropical monsoon climate district, period in rainy season length and the big simultaneously companion of rainfall With a large amount of strong thunders and lightnings.It opens rear contact net and 41 piece tripping faults has occurred, but traction substation fault localization system provides event It is very inaccurate to hinder point data, trouble shoot difficulty is caused to increase, takes and increases, wherein range error shares 25 more than 500 meters Piece, error rate 60.97%；It finds trouble point and there was only 16 pieces, equipment fault lookup rate is 39.02%.To improve therefore survey The accurate ranging problem of system, the power supply of Guilin in 2016 dimension pipeline section using the fault localization system test of expensive wide high ferro Nanning office pipeline section as Opportunity analyzes the existing principle of fault localization system used, with reference to the characteristics of expensive wide high ferro all-parallel AT traction system mode, inquires into Accurately measurement or which clear and definite power supply are needed at the beginning of opening operation for high ferro new line therefore each seed ginseng necessary to examining system work operation Number and the how quickly determining influence of contact net unit reactance empirical value and yard station track to fault localization precision, to high ferro Power supply unit thus survey device after power supply unit breaks down tripping, the failure kilometer post for meeting required precision is provided, ensures to supply Electric equipment safe and reliable operation improves fault localization precision at the beginning of opening operation for follow-up high ferro new line and provides experience.Thus it is right High ferro traction substation fault localization precision carries out technical research.

The domestic high ferro for using all-parallel AT traction system mode, feeder fault locating principle generally use AT neutral points at present It is more former than range measurement principle, reactance method ranging than range measurement principle, uplink and downlink electric current than principle (first choice), horizontal-associate line current to suct electric current Reason：

(1) AT neutral points suct electric current ratio --- by yard station track is how many, the earth leakage, AT leakage reactances, the mutual polarity of stream and former The influence of barrier point short circuiting transfer impedance is big, causes range error big.The Chinese invention patent of Publication No. CN106443354A is public A kind of high ferro circuit fault distance measurement is opened, based on the data Computing Principle for sucting current ratio method：By being led in n-th electric power Draw and several simulated failure points are set between auto-transformer AT institutes and the N+1 electric propulsion auto-transformer AT institute, calculate Average mistake between the test failure distance of each simulated failure point under same coefficient combination and simulated failure distance Difference calculates the average error value under various combinations, and one group of corresponding combination of wherein error amount minimum is exactly most Good correction factor and current distribution factor；The size of correction factor and current distribution factor is adjusted repeatedly, by calculating most Good correction factor and current distribution factor substitute into fault localization formula, reduce fault distance result and calculate error, elimination is more than 800 meters of error.But fault location precision needs to be further improved, and is repaired quickly to find trouble point.

(2) horizontal-associate line current is than ranging --- it is not influenced by AT leakage reactances and trouble point short circuiting transfer impedance, range accuracy Height, but the principle does not consider the factor after anti-thunder circle set by AT.

(3) uplink and downlink electric current is than ranging --- and it is (or AT institutes are in parallel or are that subregion institute is in parallel) in parallel in line end During operation, using uplink and downlink electric current than ranging, the restraining error by the method for operation is larger.

(4) reactance method ranging --- it directly powers, BT power supplies and all-parallel AT traction system contact net occur permanent fault and connect It touches net when restoring direct feeding system, but during by from electric substation to the supply lines of upper site, the length of cable, yard and failure The influence of transition resistance causes range error big.

In conclusion country's high iron catenary fault localization error is generally larger at present, high ferro power supply unit can not be met The requirement of operation, breakdown repair and speed limit of driving a vehicle.

In order to after high ferro power supply unit fault trip occurs, therefore surveying device can accurately indicate that high iron catenary power supply is set Standby trouble point kilometer post enables the rapid foundation of high ferro dimension pipe personnel therefore surveys the kilometer post that device provides and find trouble point and analyze to sentence The disconnected reason that is out of order, it is necessary to upgrading is carried out to existing failed equipment and improves to improve fault localization precision.

The accurate equipment fault point kilometer post provided according to improved therefore examining system is upgraded ties up pipe personnel conducive to high ferro High ferro power supply unit trouble point is rapidly and accurately found, it is quick to repair high ferro failure power supply unit, ensure high ferro power supply unit For the uninterrupted reliable power supply of high ferro motor-car；The labor that pipe personnel on site searches failure is tieed up after significantly reducing high ferro power supply unit failure Fatigue resistance also greatly shortens the time of trouble shoot, and a large amount of manpower that failure expends is searched after saving power supply unit failure And material resources.

By accurate fault localization kilometer post, for the transient fault that high ferro power supply unit occurs, supplied conducive to high ferro Electric equipment maintenance personnel quickly finds the power supply unit of dielectric strength weak spot, and overhauls or replace the insulation there are hidden danger in time Son and the external environment for jeopardizing safe power supply so as to avoid the formation of high ferro supply line permanent fault, ensure that power supply unit is long Phase safe and stable operation.

By accurate fault localization kilometer post, conducive to Railway Bureau's power supply dispatching according to thus survey that device provides accurate therefore Kilometer post is surveyed, in accurate fault section in time to the high ferro motor-car speed limit of high-speed cruising, prevents from surveying kilometer post mistake for some reason, lead The non-speed limit of high ferro motor-car and high-speed cruising are caused in fault section, is in turn resulted in equipment fault section because of foreign matter and high-speed cruising Motor-car collision jeopardizes driving again and the accident of passenger safety occurs.

Invention content

In order to solve the above technical problem, the present invention provides a kind of high ferro dimension pipe traction substations to promote fault localization essence The method of degree based on horizontal-associate line current than range measurement principle, increases the amendment meter for drawing and having anti-thunder circle in its calculation formula Calculate formula and pair underlying parameter that event examining system is set and typing accuracy is high so that fault localization precision improves, and reaches survey It is less than 400 meters away from error, it is ensured that the safe operation of high ferro power supply unit and high ferro motor-car are started safely.

To achieve these goals, the present invention adopts the following technical scheme that.

A kind of method that high ferro dimension pipe traction substation promotes fault localization precision, this method include：

Step 1, in existing horizontal-associate line current than correcting horizontal-associate line current after on telemetry basis, installing anti-thunder circle additional Than telemetry calculation formula and its realization principle；

Step 2 according to fault localization test data during same segments contact net short-circuit test, is taken according to physical fault Point obtains the reactance of circuit unit and the resistance of anti-thunder circle with reference to the horizontal-associate line current after optimization than the method that telemetry principle formula is retrodicted Anti- value so as to obtain circuit unit reactance during accurately practical tripping and anti-thunder circle impedance value, makes trouble point in fault section Relative distance it is more accurate, fault location device is made more accurately to indicate trouble point kilometer post, finally obtains accurate contact net Fault localization precision.

Preferably, as described in step 1, according to calculation formula of the existing horizontal-associate line current than telemetry principle：

D represents the length of failure AT sections, represents traction institute with the distance between site on AT institutes, subregion (containing online Power line length), do not consider that traction institute, AT institutes, subregion have the factor of anti-thunder circle；

According to the mesh figure that all-parallel AT traction system T-R short-circuit currents are illustrated, by anti-thunder circle impedance according to connecing Net-fault unit reactance is converted to equivalent contact net length, that is, is converted to equivalent T lines, F lines, TF line lengths, and anti-thunder circle is equivalent Length is included in the length D of failure AT sections；

During T line failures, optimize the horizontal-associate line current containing anti-thunder circle equivalent length is than telemetry principle formula：

When for F lines or TF line failures, LT in formula (2) is changed to LF or LTF, LT as the equivalent T line lengths of anti-thunder circle, LF For the equivalent F line lengths of anti-thunder circle, LTF is the equivalent TF line lengths of anti-thunder circle；

In formula (2), 2LT represents the sum of the LT of fault section head end and the LT of fault section end, and formula subtracts in (2) LT is the LT of fault section head end；

Anti- thunder circle substitutional connection calculating formula of length is as follows：

ZL is anti-thunder circle impedance, and ZF is F line unit reactance, and ZT is T line unit reactance, and sin Φ are line impedance angle；

Formula (2) after optimization considers influence of the anti-thunder circle to fault localization precision, improves the accurate of fault localization Property.

In any of the above-described technical solution preferably, it in the step 2, is tried according to same segments contact net short circuit Fault localization test data when testing is taken according to actual fault point, with reference to the horizontal-associate line current after optimization than range measurement principle formula The method retrodicted obtains the reactance of circuit unit and anti-thunder circle impedance value, calculates the reactance of circuit unit and anti-thunder circle impedance value such as formula (4) shown in,

It takes and acquires the reactance of circuit unit and anti-thunder circle impedance value according to the data of same section different faults point or acquire The reactance of multiple unit and anti-thunder circle impedance value, take its average value, to obtain circuit unit electricity during accurately practical tripping Anti- and anti-thunder circle impedance value.

In any of the above-described technical solution preferably, in the step 2, for determining the reactance of circuit unit and resisting Thunder circle impedance value in order to make trouble point more accurate in the relative distance of fault section, makes range unit more accurately indicate failure Point kilometer post, specifically with the following method：

Failure calibration formula during according to T line failures

When for F or TF failures, LT in formula (5) is changed to LF or LTF,

LT is the equivalent T line lengths of anti-thunder circle, and LF is the equivalent F line lengths of anti-thunder circle, and LTF is the equivalent TF line lengths of anti-thunder circle,

As n=2, fault distance L is modified to L '=L-2*L2.

In any of the above-described technical solution preferably, the calculating of the trouble point kilometer post includes：

When kilometer post direction is big mileage (+), trouble point kilometer is designated as：S1+(L-L1)；L is trouble point relative distance；

When kilometer post direction is small mileage (-), trouble point kilometer is designated as：S1-(L-L1)；L is trouble point relative distance；

Wherein, S1 is site kilometer post in electric substation, and L1 is electric substation's power supply line length；

It during according to more than failure calibrated and calculated, also needs accurately to determine traction substation, AT institutes, subregion institute kilometer post, determine Length between site in each power supply line length of surfing the Internet, contact net section, check and correction PT pressures are mutual, CT flows mutual no-load voltage ratio, flow mutual polarity, right Therefore the input and verification of examining system device parameter；

By the horizontal-associate line current after optimization than range measurement principle formula (2), accurate unit reactance and anti-thunder circle impedance value And each underlying parameter is perfect, promotes fault localization precision.

In any of the above-described technical solution preferably, the implementation to the step 2 needs to carry out fault localization implementation Preceding preparation and short-circuit test operation, specifically include：

(1) accuracy of underlying parameter is confirmed, including site kilometer on traction substation, AT institutes, subregion institute supply lines Length between site in mark, power supply line length and material type, contact net section, check and correction PT is mutually pressed, CT flows mutual no-load voltage ratio, CT streams are mutual Polarity carries out the measurement and confirmation of underlying parameter, and the input and verification of parameter are carried out to fault localization system and device；

(2) by contact net short-circuit test, contact net physical fault range accuracy is verified, while correct fault localization system Bulk cargo puts the reactance of T line F line units, anti-thunder circle equivalent reactance value, until fault localization precision reaches expected required precision.

In any of the above-described technical solution preferably, fault localization pre-implementation preparatory work and short-circuit test operation (1) underlying parameter described in confirms, specifically includes：

(1) establishment officer is to site kilometer on the supply lines of each traction institute of traction substation (institute containing AT, subregion institute) Mark is verified；

(2) surf the Internet power supply line length and material draw to each of traction substation (institute containing AT, subregion institute) in establishment officer Matter type is verified, and supply lines measurement of length error is less than 1 meter, while aerial aluminum stranded conductor or cable is distinguished and distinguished Record its length；

(3) to include drawing institute, AT institutes, subregion institute in pressure mutually, flow mutual no-load voltage ratio and check, especially feeder line stream Mutually protection no-load voltage ratio, self coupling unsteady flow mutually protects no-load voltage ratio, concentrates the mutual no-load voltage ratio of stream in grounding box；It is surveyed with mutual inductor characteristic tester Examination determines the mutual protection no-load voltage ratio of stream and flows mutual polarity；

(4) fault location device definite value is checked, according to the underlying parameter of prophase nucleus pair respectively to each traction substation, AT Institute, subregion fault location device definite value verification.

In any of the above-described technical solution preferably, according to fault localization pre-implementation preparatory work and short-circuit test The newest underlying parameter of (one) described revision is operated, short-circuit test is carried out to each electric substation, verifies feeder fault locating error Precision, short-circuit test operation specifically include：

(1) corresponding preparation is carried out in high ferro traction substation, is done before experiment by electric substation person on duty by high ferro maintenance requirement Reason application exits that traction substation main transformer is hauled oneself willingly into, inlet wire is hauled oneself willingly into, feeder line reclosing pressing plate and is switched to 1 tunnel of ac panel 10kV is used to become 2 tunnels and to be set as 2 masters 1 standby；Application is adjusted to exit AT institutes, subregion institute to electricity from each AT institutes, subregion institute Field Force The soft pressing plate of o-volt protection of interior all breakers；

(2) according to different line modes, short dot is determined；Experiment includes：Using the full method of operation in parallel, Bu Yue areas, become Electric institute each supply arm the 1st AT sections of uplink F lines, full parallel operation mode are tested, and the 2nd AT sections of downgoing lines are T lines, T-F Line, direct-furnish, complete in parallel, AT exit mode input by subregion and are tested.

In any of the above-described technical solution preferably, the setting of the short dot includes：

(1) ground short circuit operational method；

(2) institute's pavilion back brake mode.

In any of the above-described technical solution preferably, (1) the ground short circuit operational method, i.e., by permanent earth side Case is grounded, and is specifically included：1. associated contact net supply arm has a power failure；2. use 25mm²Annealed copper strand wire warp nose one end and perforation ground Line connects, and the other end is connect with contact net inclined cantilever current-carrying part；3. traction substation correlation feeder line power transmission.

In any of the above-described technical solution preferably, (2) the institute pavilion back brake mode, electric substation, subregion institute, AT institutes are Using power remote monitor, the mode of locality operation carries out the related transmission or not back brake operation of short-circuit test.

Compared with prior art, above-mentioned technical proposal of the invention has the advantages that：

1st, horizontal-associate line current is not influenced than range measurement principle by AT leakage reactances and trouble point short circuiting transfer impedance, range accuracy Height, but the factor after anti-thunder circle set by AT is not considered；On the basis of existing horizontal-associate line current is than range measurement principle and in its meter Calculating increases traction in formula have the modified computing formulae of anti-thunder circle, the calculating of ranging distance not by AT leakage reactances, rail over the ground Leakage and the influence of trouble point short circuiting transfer impedance, realize higher range accuracy from principle.

2nd, it considers therefore surveying device needs actual conditions according to high ferro supply line in actual motion in high ferro, then base The precision of plinth data setting also directly affects therefore surveys device running precision, therefore is set to carrying out underlying parameter in fault location device It puts and typing, it is accurate to measure high ferro traction substation, AT institutes, subregion institute kilometer post, online power supply line length, contact net supply lines Length, check and correction PT (pressing mutual), CT (stream is mutual) no-load voltage ratio, the mutual polarity of stream, makes the parameter of setting closer with actual parameter, improves event Survey device running precision.

Description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also To obtain other attached drawings according to these attached drawings.

Fig. 1 is that high ferro according to the invention ties up the preferred implementation that pipe traction substation promotes the method for fault localization precision The functional block diagram of example；

Fig. 2 is that high ferro according to the invention ties up the preferred implementation that pipe traction substation promotes the method for fault localization precision The all-parallel AT traction system T-R short-circuit current schematic diagrames of example；

Fig. 3 is that high ferro according to the invention ties up the preferred implementation that pipe traction substation promotes the method for fault localization precision Traction institute and the distance between site schematic diagram on AT institutes, subregion of example；

Fig. 4 is that high ferro according to the invention ties up the preferred implementation that pipe traction substation promotes the method for fault localization precision The electric substation of example, AT institutes, subregion institute rough schematic；

Fig. 5 is that high ferro according to the invention ties up the preferred implementation that pipe traction substation promotes the method for fault localization precision The Liang An electric substations short-circuit test position view of example；

Fig. 6 is that high ferro according to the invention ties up the preferred implementation that pipe traction substation promotes the method for fault localization precision The permanent short-circuit catenation principle figure of example.

Specific embodiment

Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work Embodiment shall fall within the protection scope of the present invention.

In view of country's high iron catenary fault localization error is generally larger at present, high ferro power supply unit operation life can not be met The requirement of production, breakdown repair and speed limit of driving a vehicle.In order to after high ferro power supply unit fault trip occurs, thus survey device can be accurately It indicates high iron catenary power supply unit trouble point kilometer post, enable the rapid foundation of high ferro dimension pipe personnel therefore surveys the kilometer that device provides Mark finds trouble point and analyzes and determines the reason that is out of order, it is necessary to upgrading is carried out to existing failed equipment and improves to improve fault localization Precision.

Embodiment

Apparatus system equipment acceptance of the bid producer is surveyed when expensive wide, electric current was originally sucted than range measurement principle using AT neutral points, by Yard station track is how many, greatly leakage, AT leakage reactances, the mutual polarity of stream and trouble point short circuiting transfer impedance influence is big, leads to Gui Guanggao After the tripping of iron power supply unit therefore to survey device the failure kilometer post provided and the failure point tolerance that actually finds very big.

Be improving existing fault location device therefore survey precision, occur after tripping fault according to thus survey kilometer post and quickly find Trouble point is simultaneously correspondingly processed, and ensures the safety of high ferro power supply unit, by horizontal-associate line current than telemetry principle and in terms of it It is research direction to calculate increase traction in formula to have the modified computing formulae of anti-thunder circle.

In addition, therefore survey device needs the actual conditions according to high ferro supply line, to failure in actual motion in high ferro Underlying parameter setting and typing are carried out in range unit, the precision of basic data setting also directly affects therefore surveys device operation essence Degree.For this purpose, being analyzed according to expensive wide high ferro contact net short-circuit test fault localization data in 2016, circuit list is further improved Position reactance and anti-thunder circle unit reactance meter count the precision of evidence, accurate to measure high ferro traction substation, AT institutes, subregion institute kilometer Mark, online power supply line length, contact net power supply line length；Proofread PT (pressure is mutual), CT (stream is mutual) no-load voltage ratio, the mutual polarity of stream；Make setting Parameter and actual parameter it is closer, with improve thus survey device running precision.

Achievement in research is applied to the fault localization system of 410 kilometers of operation mileage power supply units of expensive wide high ferro Nanning office pipeline section System.Using contact net after the lift technique break down tripping after thus survey device range error be respectively less than 400 meters, foundation thus survey number According to can find trouble point rapidly, according at the power supply of Nanning office pairs therefore survey device effective evaluation grade and be determined as excellent, residence south Peaceful office's global power system thus to survey precision the first, start safely for high ferro power supply unit operational safety and high ferro motor-car and provided It tries hard to keep barrier, has played particularly important effect.

The method that high ferro dimension pipe traction substation described in the present embodiment promotes fault localization precision, as shown in Figure 1, it is wrapped It includes：

Existing horizontal-associate line current is than telemetry principles and methods：

Horizontal-associate line current refers to feeder current of the downstream to uplink.Horizontal-associate line current ratio refers to failure AT segment distances Electric substation's distal end horizontal-associate line current is than the ratio of the sum of upper failure AT sections of both ends horizontal-associate line current.In traction substation, it is impossible to logical It crosses CT and obtains horizontal-associate line current, but can be obtained by the half of uplink and downlink feeder current differenceIt is respectively in AT institutes and subregion institute, horizontal-associate electric current：According to complete tri- kinds of short circuits of Parallel AT Traction networks T-R, F-R, T-F The current distributing figure of failure, can derive and be suitable for the ranging formula under these three fault conditionsWhen using horizontal-associate line current than telemetry principle, each institute's horizontal-associate on supply arm is found Line current maximum value and second largest value seek horizontal-associate line current ratio according to horizontal-associate line current maximum value and second largest value, and be obtained failure away from From.When electric substation, AT and subregion suct electric current be less than TF type breakdown judges current setting, i.e.,It is then TF type failures.When TF type failures occur, such as horizontal-associate Line current maximum value residing for power transformation, then whenFault distinguishing is down direction, otherwise is up direction, When AT institute or subregion residing for when,Up direction is determined as, otherwise is downlink side To).When not being TF failures, at according to maximum horizontal-associate line currentReally Determine failure uplink and downlink and T, F type.

Fig. 2 is all-parallel AT traction system mode Traction networks T-R short-circuit current distribution maps, it is assumed that T lines, F lines and rail Unit self-impedance and mutual impedance are：ZT、ZF、ZR、ZTF、ZTR、ZFR.In the mesh section that short trouble occurs, uplink and downlink T1 and T2, F1 and F2, R1 and R2 form respectively three closed circuits.

List three loop-voltage equations：

Solving equations can obtain I_F、I₀、I_T

Horizontal-associate line current can be obtained by above equation and failure hole pattern figure：

Horizontal-associate line current can be derived than telemetry principle calculation formula by above formula：

It follows that:

(1), during T-R short circuits, before and after the equivalent T line currents of fault section uplink and downlink and trouble point in side horizontal-associate line Electric current relationship proportional to short circuit current I, and in above-mentioned derivation respectively, do not relate to AT leakage reactances, rail pair Ground leaks and trouble point short circuiting transfer impedance factors, therefore it is not leaked over the ground by AT leakage reactances, rail and trouble point short circuiting transfer hinders Anti- influence.

(2), when T-R short troubles occur, the T lines electricity of uplink and downlink in fault section equivalent circuit can be utilized The proportionate relationship of stream or the electric current in the horizontal-associate line of trouble point both sides, to carry out the calibration of trouble point, and this two methods is equal It is not leaked over the ground by AT leakage reactances, rail and trouble point short circuiting transfer impedance is influenced.

(3), above-mentioned conclusion is equally applicable to F-R, T-F failure.

From horizontal-associate line current than telemetry principle formula it is recognised that the calculating of ranging distance not by AT leakage reactances, rail The influence of leakage and trouble point short circuiting transfer impedance over the ground, there is higher range accuracy from principle.

For existing horizontal-associate line current than range measurement principle, modified computing formulae and principle after anti-thunder circle are installed additional：

It is analyzed according to horizontal-associate line current than telemetry principle formula,

In formula (1), D represents the length of failure AT sections, as shown in figure 3, D=D0+L1+L2 or D=D1+L2+L3, table Show traction institute and the distance between site on AT institutes, subregion (line length of power supply containing online).Traction institute, AT are not considered Institute, subregion have the factor of anti-thunder circle.

In order to solve the problems, such as that traction institute, AT institutes, the anti-thunder circle of subregion institute influence, according to all-parallel AT traction system T-R short circuit events Hinder the mesh figure of electric current signal, by anti-thunder circle impedance according to contact net unit reactance to be converted to equivalent contact net long Degree, that is, be converted to equivalent T lines, F lines, TF line lengths, anti-thunder circle equivalent length is included in the length D of failure AT sections.

During T line failures, optimization horizontal-associate line current is than principle formula (containing anti-thunder circle equivalent length)：

When for F lines or TF line failures, it is the equivalent T line lengths of anti-thunder circle that LT in above formula is changed to LF or LTF, LT, and LF is The anti-equivalent F line lengths of thunder circle, LTF are the equivalent TF line lengths of anti-thunder circle.2LT represents the LT and failure of fault section head end in formula The sum of LT of segment ends subtracts the LT that LT is fault section head end in formula.

ZL is anti-thunder circle impedance, and ZF is F line unit reactance, and ZT is T line unit reactance, and sin Φ are line impedance angle.

From the point of view of the formula (2) after optimization, influence of the anti-thunder circle to fault localization precision has been considered in formula, improves The accuracy of fault localization.But the horizontal-associate line current after optimizing is than arriving the reactance of circuit unit and anti-thunder circle impedance involved in formula Precision problem, be experience number according to previous therefore survey the reactance of circuit unit and anti-thunder circle impedance data that device is set using According to accuracy is not high, if still according to previous unit reactance empirical data, anti-thunder circle is equivalent to line length, will be caused Fault localization error increases.

Accurate circuit unit reactance and anti-thunder circle impedance value in order to obtain, during according to same segments contact net short-circuit test Fault localization test data is taken according to actual fault point, is retrodicted with reference to the horizontal-associate line current after optimization than range measurement principle formula Method obtain the reactance of circuit unit and anti-thunder circle impedance value, so as to obtain circuit unit reactance during accurately practical tripping and Anti- thunder circle impedance value.

The formula (4) for calculating the reactance of circuit unit and anti-thunder circle impedance value is as follows, can take according to the different events of same section The data of barrier point acquire the reactance of circuit unit and anti-thunder circle impedance value, can also acquire the reactance of multiple unit and anti-thunder circle impedance Value, takes its average value, better.

It is in order to make trouble point more accurate in the relative distance of fault section above, but makes range unit more accurate Instruction trouble point kilometer post, it is also necessary to carry out following work.

According to failure calibration formula (during T line failures)：

Explanation：

1) LT in above formula is changed to LF or LTF when for F or TF failures.

2) LT is the equivalent T line lengths of anti-thunder circle, and LF is the equivalent F line lengths of anti-thunder circle, and LTF is the equivalent TF line lengths of anti-thunder circle Degree.

3) amendment of fault distance L：As n=2, L is modified to L '=L-2*L2.

With reference to electric substation as shown in Figure 4, AT institutes, subregion institute rough schematic, schematic diagram explanation：

(1) S1, S2, S3 be respectively electric substation, AT institutes, site kilometer post on subregion；

(2) L1, L2, L3 are respectively that electric substation, AT institutes, subregion are powered line length；

(3) the first AT segment length (D0) are L1+S2-S1+L2, and the 2nd AT sections of (D1) length (D1) are L2+S3-S2+L3.

It should be noted that trouble point kilometer post calculates：

(1) when kilometer post direction is big mileage (+)：

Trouble point kilometer is designated as：S1+(L-L1)；L is trouble point relative distance；

(2) when kilometer post direction is small mileage (-)：

Trouble point kilometer is designated as：S1-(L-L1)；L is trouble point relative distance；

Wherein, S1 is site kilometer post in electric substation, and L1 is electric substation's power supply line length.

It during according to more than failure calibrated and calculated, also needs accurately to determine traction substation, AT institutes, subregion institute kilometer post, determine Length between site in each power supply line length of surfing the Internet, contact net section, check and correction PT (pressure is mutual), CT (stream is mutual) no-load voltage ratio flow mutual pole Property, input and verification pair event examining system device parameter.

By the horizontal-associate line current after optimization than range measurement principle formula (2), accurate unit reactance and anti-thunder circle impedance value And each underlying parameter is perfect, just can reach preferable range accuracy.

According to the horizontal-associate line current after optimization than range measurement principle, to expensive 410 kilometers of operation mileages of wide high ferro Nanning office pipeline section Each supply arm contact net of completely traction institute carries out all types of short-circuit tests.Expensive wide high ferro respectively draws institute's fault localization test data row Table is as follows：

Table 1

The circuit under the all-parallel AT traction system method of operation is can be seen that from the statistical data of table 1 and actually occurs failure, is used Horizontal-associate line current after optimization can reach preferable range accuracy, control errors are within 400 meters than range measurement principle.

More accurate feeder fault locating precision in order to obtain, according to horizontal-associate line current than telemetry principle, need into The pre-implementation preparatory work of row fault localization and short-circuit test.It is realized by two steps, first, confirming the accurate of underlying parameter Property, become including site kilometer post, power supply line length and material type, PT, CT on traction substation, AT institutes, subregion institute supply lines Than etc. underlying parameters measurement and confirmation, CT polarity, therefore survey the verification of device definite value；Second is that by contact net short-circuit test, verification Contact net physical fault range accuracy, while the reactance of event examining system device T line F line units, anti-thunder circle equivalent reactance value are corrected, directly Extremely therefore survey precision and reach expected required precision.

First, establishment officer verifies site kilometer post on each traction institute (institute containing AT, subregion institute) supply lines, i.e., as schemed The kilometer post of S1, S2, S3 in 3 etc., the accuracy of the kilometer post directly influence the length of AT sections of contact net lines, also influence To the error size of ranging.Secondly establishment officer is to each traction institute (institute containing AT, subregion institute) online power supply line length and material Type is verified, it is necessary to which strict guarantee supply lines measurement of length error is less than 1 meter, such as L1, L2, L3 in Fig. 3, while to distinguish It is to make somebody a mere figurehead aluminum stranded conductor or cable, length are how many respectively.

Be again in pressure (including traction institute, AT institutes, subregion institute) mutually, stream mutual no-load voltage ratio verification, especially feeder line stream Mutually protection no-load voltage ratio, self coupling unsteady flow mutually protects no-load voltage ratio, concentrates the mutual no-load voltage ratio of stream in grounding box.It is surveyed with mutual inductor characteristic tester Examination determines the mutual protection no-load voltage ratio of stream and flows mutual polarity.

Be finally pair therefore survey the verification of device definite value, according to early period to underlying parameter respectively to each traction substation, AT institutes, point Institute of area thus survey the verification of device definite value.It is related to parameter such as table 2：

Table 2

According to the newest underlying parameter revised as described above, short-circuit test, verification contact net event are carried out to each electric substation Hinder the precision of range error.

Corresponding preparation is carried out in high ferro traction substation first, safeguards that correlation will by high ferro by electric substation person on duty before experiment Ask handle application exit traction substation main transformer is hauled oneself willingly into, inlet wire is hauled oneself willingly into, feeder line reclosing pressing plate and by 1 tunnel of ac panel switch To 2 tunnels (10kV is used to be become) and it is set as " 2 masters 1 are standby "；From each AT institutes, subregion institute Field Force to electricity adjust application exit AT institutes, Subregion in all breakers the soft pressing plate of o-volt protection.

Further according to different line modes, short dot is determined.By taking expensive wide high ferro two pacifies traction substation as an example, schematic diagram such as Fig. 5 It is shown.It tests using the full method of operation in parallel, Bu Yue areas, the 1st AT sections of uplink F lines of each supply arm of electric substation, full parallel connection Power supply mode is tested, and the 2nd AT section downgoing lines make T lines, T-F lines, direct-furnish, full parallel connection, AT exit mode input by subregion Experiment.

Specific experiment process is as follows：

(1) Liang An electric substations Kweiyang direction 211,214 kilovolt feed line short circuit tests

1. the 1st short dot of Liang An electric substations：(downlink AT input by AT institutes, subregion becomes).

(1) the 1st time：Sand flat AT institute is to lotus flower subregion institute (the 2nd AT sections) short-circuit test (T-R)

AT is exited, under AT power supply modes input by subregion, and contact net is permanent short-circuit (T-R) over the ground, place：Respectful city It stands-western the downlink in the Zhong Mountain, lotus flower subregion institute is between sand flat AT institutes at 659# catenary masts (531km006m)；Distance two pacifies power transformation 22.853 kms.

The operation order of execution：

Sand flat AT institutes：1. 1#AT is exited, point 291 breakers.

Lotus flower subregion institute：1. putting into 3#AT, 293 breakers are closed.

Liang An electric substations：

1. divide the breaker of 2611QS, 211,214,201 successively；

2. divide 2112,2142QS；

3. set short dot (T-R) in lotus flower subregion institute to downlink 659# between sand flat AT institutes；

4. confirmation 2011,2001,2003,2111,2141QS are closing position；

After 5. personnel are withdrawn other than non-electrical source 100m, 2112,2142QS closes in Liang An electric substations.

6. 211,214,201 breakers are closed successively.

7. restore the former method of operation after the completion of experiment.

2nd time：Under direct feeding system, contact net is permanent short-circuit (T-R) over the ground

Place：Respectful city station-Zhong Mountain western station downlink, lotus flower subregion institute is between sand flat AT institutes at 659# catenary masts (531km006m)；22.853 km of distance Liang An electric substations.

The operation order of execution：

Sand flat AT institutes：1. 1#AT is exited, point 291 breakers.

Lotus flower subregion institute：1. 3#AT is exited, point 293 breakers.

Liang An electric substations：

1. divide 211,214,201 breakers successively；

2. divide 2112,2142,3101F disconnecting switch；

4. confirmation 2011,2001,2003,2111,2141QS are closing position；

After 5. personnel are withdrawn other than non-electrical source 100m, 2112GK closes in Liang An electric substations.

6. 211,201 breakers are closed successively.

7. restore the former method of operation after the completion of experiment.

(3) the 3rd times：Sand flat AT institute is to lotus flower subregion institute (the 2nd AT sections) short-circuit test (T-R)：

Under all-parallel AT traction system mode, contact net is permanent short-circuit (T-R) over the ground, place：Under respectful city station-Zhong Mountain western station Row, lotus flower subregion institute is between sand flat AT institutes at 659# catenary masts (531km006m)；Distance Liang An electric substations 22.853 thousand Rice.

The operation order of execution：

Sand flat AT institutes：1. putting into 1#AT, 291 breakers are closed.

Liang An electric substations：

1. divide 211,214,201 breakers successively；

2. divide 2112,2142；

4. confirmation 2011,2001,2003,2111,2141QS are closing position；

After 5. personnel are withdrawn other than non-electrical source 100m, 2112,2142GK closes in Liang An electric substations.

6. 211,214,201 breakers are closed successively.

7. restore the former method of operation after the completion of experiment.

2. the 2nd short dot of Liang An electric substations：(uplink AT input by AT institutes, subregion becomes).

Liang An electric substations to bitter bamboo river AT institutes (the 1st AT sections) short-circuit test (F-R)：

Under all-parallel AT traction system mode, positive feeder is permanent short-circuit (F-R) over the ground, place：On respectful city station-Zhong Mountain western station Row, Liang An electric substations are between sand flat AT institute at 1362# catenary masts (545km863m)；Distance Liang An electric substations 7.996 thousand Rice.

The operation order of execution：

Sand flat AT institutes：1. putting into 2#AT, 291 breakers are closed.

Lotus flower subregion institute：1. putting into 2#AT, 293 breakers are closed.

Liang An electric substations：

1. divide 211,214,201 breakers successively；

2. divide 2112,2142；

3. set short dot (F-R) in Liang An electric substations to 1362# between sand flat AT institutes；

4. confirmation 2011,2001,2003,2111,2141QS are closing position；

6. 211,214,201 breakers are closed successively.

7. restore the former method of operation after the completion of experiment.

(2) Liang An electric substations Guangzhou direction 212,213 kilovolt feed line short circuit tests

(1) the 1st time：Big rock mouth AT institutes are to the western subregion institute in the Zhong Mountain (the 2nd AT sections) short-circuit test (T-R)

AT is exited, under AT power supply modes input by subregion, and contact net is permanent short-circuit (T-R) over the ground, place：Respectful city It stands-Zhong Mountain western station downlink, the western subregion institute in the Zhong Mountain is between big rock mouth AT institutes at 2427# catenary masts (571km765m)；Distance 17.906 km of Liang An electric substations.

The operation order of execution：

Big rock mouth AT institutes：1. 1#AT is exited, point 291 breakers.

The western subregion institute in the Zhong Mountain：1. putting into 1#AT, 291 breakers are closed.

Liang An electric substations：

1. divide the breaker of 2611QS, 212,213,202 successively；

2. divide 2122,2132；

3. set short dot (T-R) in the western subregion in Zhong Mountain institute to downlink 2427# between big rock mouth AT institutes；

4. confirmation 2021,2002,2004,2121,2131QS are closing position；

After 5. personnel are withdrawn other than non-electrical source 100m, 2122,2132GK closes in Liang An electric substations.

6. 212,213,202 breakers are closed successively.

7. restore the former method of operation after the completion of experiment.

Place：Respectful city station-Zhong Mountain western station downlink, the western subregion in Zhong Mountain institute is between big rock mouth AT institutes at 2427# catenary masts (571km765m)；17.906 km of distance Liang An electric substations.

The operation order of execution：

Big rock mouth AT institutes：1. 1#AT is exited, point 291 breakers.

The western subregion institute in the Zhong Mountain：1. 1#AT is exited, point 291 breakers.

Liang An electric substations：

1. divide 212,213,202 breakers successively；

2. divide 2122,2132,3103F disconnecting switch；

4. confirmation 2021,2002,2004,2121,2131QS are closing position；

After 5. personnel are withdrawn other than non-electrical source 100m, 2132GK closes in Liang An electric substations.

6. 213,202 breakers are closed successively.

7. restore the former method of operation after the completion of experiment.

(3) the 3rd times：Big rock mouth AT institutes are to the western subregion institute in the Zhong Mountain (the 2nd AT sections) short-circuit test (T-R)

Under all-parallel AT traction system mode, contact net is permanent short-circuit (T-R) over the ground, place：Under respectful city station-Zhong Mountain western station Row, the western subregion in Zhong Mountain institute is between big rock mouth AT institutes at 2427# catenary masts (571km765m)；Distance Liang An electric substations 17.906 kms.

The operation order of execution：

Big rock mouth AT institutes：1. putting into 1#AT, 291 breakers are closed.

Liang An electric substations：

1. divide 212,213,202 breakers successively；

2. divide 2122,2132；

4. confirmation 2021,2002,2004,2121,2131QS are closing position；

After 5. personnel are withdrawn other than non-electrical source 100m, 2122,2132GK closes in Chao Tian electric substations.

6. 212,213,202 breakers are closed successively.

7. restore the former method of operation after the completion of experiment.

Liang An electric substations to big rock mouth AT institutes (the 1st AT sections) short-circuit test (F-R)：

Under all-parallel AT traction system mode, positive feeder is permanent short-circuit (F-R) over the ground, place：On respectful city station-Zhong Mountain western station Row, Liang An electric substations are between big rock mouth AT institutes at 2182# catenary masts (565km450m)；Distance Liang An electric substations 11.591 Km.

The operation order of execution：

Big rock mouth AT institutes：1. putting into 2#AT, 291 breakers are closed.

The western subregion institute in the Zhong Mountain：1. putting into 4#AT, 291 breakers are closed.

Liang An electric substations：

1. divide 212,213,202 breakers successively；

2. divide 2122,2132QS；

3. set short dot (F-R) in Liang An electric substations to 2182# between big rock mouth AT institutes；

4. confirmation 2021,2002,2004,2121,2131QS are closing position；

6. 212,213,202 breakers are closed successively.

7. restore the former method of operation after the completion of experiment.

For above-mentioned short-circuit test, short dot setting method：

1. ground short circuit operational method

It is grounded by permanent earth scheme.Specific method：1. associated contact net supply arm has a power failure；2. it is twisted with 25mm2 soft coppers Line warp nose one end is connect with Through ground wire, and the other end is connect with contact net inclined cantilever current-carrying part；3. traction substation phase Close feeder line power transmission.

Permanent short circuit catenation principle figure is as shown in Figure 6.

T, F lines ground connection is tested to be directly grounded by operating main transformer secondary side breaker.

The specific mode of connection is as follows：

F lines ground connection is using two 240 and hook wire clamp and 15m long LGJ240 lines, through 25mm2 annealed copper strand wire warp noses one end It is connect with Through ground wire；

T lines ground connection is directly hung on bracket using maintenance property-line, and the other end is connect with Through ground wire.

2. pavilion back brake mode

Electric substation, subregion institute, AT use power remote monitor, the mode of locality operation carry out mutually the shutting down of short-circuit test, Power transmission back brake operation.

During experiment, a contact net short-circuit test is often done, makes analysis immediately to Tripping data at once.If ranging Error is larger, need to readjust setting circuit unit reactance and anti-thunder circle impedance value, be surveyed according to failure during contact net short-circuit test Away from test data, take according to actual fault point kilometer post data, with reference to the horizontal-associate line current after optimization than range measurement principle formula The method retrodicted calculates the reactance of circuit unit and anti-thunder circle impedance value, so as to obtain circuit unit during accurately practical tripping Reactance and anti-thunder circle impedance value.

Test data is as shown in table 3：

Table 3

It can be seen that from statistical data above and be adjusted underlying parameter and the reactance of circuit unit and anti-thunder circle impedance value Afterwards, circuit actually occurs failure under various powered operation modes, can reach preferable range accuracy, control errors are at 400 meters Within.

By studying above and specific implementation process, the reason of original horizontal-associate line current is more larger than range error is had found For：First, the influence that traction adds anti-thunder circle pair therefore surveys device operation is not accounted for, second is that basic data is empirical value, precision It is not high, and then influence therefore survey device running precision.

By studying above and specific implementation process, rational Computing Principle and the solution party for improving therefore surveying precision are had found Case.

By studying above and specific implementation process, form and completely compare ranging from the horizontal-associate line current of theory into action Precision improvement technology improves high ferro power supply unit therefore surveys precision, and China has electric railway up to 7.8 ten thousand kilometers at present, Middle 2.2 ten thousand kilometers of high ferro, almost using tradition thus survey principle and carry out fault localization, precision and efficiency are unfavorable for all than relatively low The safe operation of high ferro power supply unit and high ferro motor-car.Precision is surveyed using event examining system after this lift technique, can be substantially improved, It plays a great role for system-wide electric power system power supply unit safe operation.

It should be noted that the above is only that the preferred embodiment of the present invention is described, it is not to this hair Bright range is defined；The foregoing is merely the specific embodiment of the present invention, the guarantor being not intended to limit the present invention Protect range；Under the premise of design spirit of the present invention is not departed from, this field ordinary skill technical staff is to the technical side of the present invention Any modification, equivalent substitution, improvement and etc. that case is made should all be fallen into the protection domain that claims of the present invention determines.

Claims

1. a kind of method that high ferro dimension pipe traction substation promotes fault localization precision, this method include：

Step 1, in existing horizontal-associate line current than correcting horizontal-associate line current than surveying after on telemetry basis, installing anti-thunder circle additional Away from method calculation formula and its realization principle；

Step 2 according to fault localization test data during same segments contact net short-circuit test, is taken according to actual fault point, knot It closes the horizontal-associate line current after optimization and obtains the reactance of circuit unit and anti-thunder circle impedance value than the method that telemetry principle formula is retrodicted, So as to obtain circuit unit reactance during accurately practical tripping and anti-thunder circle impedance value, make trouble point in the opposite of fault section Distance is more accurate, and fault location device is made more accurately to indicate trouble point kilometer post, finally obtains accurate contact net failure and surveys Away from precision.

2. the method that high ferro dimension pipe traction substation as described in claim 1 promotes fault localization precision, it is characterised in that：Such as Described in step 1, according to calculation formula of the existing horizontal-associate line current than telemetry principle：

D represents the length of failure AT sections, represents traction institute and the distance between site on AT institutes, subregion, the distance is containing upper Net power supply line length does not have the factor of anti-thunder circle in view of traction institute, AT institutes, subregion；

According to all-parallel AT traction system T-R short-circuit currents illustrate mesh figure, by anti-thunder circle impedance according to contact net Unit reactance is converted to equivalent contact net length, that is, is converted to equivalent T lines, F lines, TF line lengths, anti-thunder circle equivalent length It is included in the length D of failure AT sections；

When for F lines or TF line failures, it is the equivalent T line lengths of anti-thunder circle that LT in formula (2) is changed to LF or LTF, LT, and LF is anti- The equivalent F line lengths of thunder circle, LTF are the equivalent TF line lengths of anti-thunder circle；

In formula (2), 2LT represents the sum of the LT of fault section head end and the LT of fault section end, and subtracting LT in formula (2) is The LT of fault section head end；

Formula (2) after optimization considers influence of the anti-thunder circle to fault localization precision, improves the accuracy of fault localization.

3. the method that high ferro dimension pipe traction substation as described in claim 1 promotes fault localization precision, it is characterised in that： In the step 2, according to fault localization test data during same segments contact net short-circuit test, take according to actual fault point, The reactance of circuit unit and anti-thunder circle impedance value are obtained than the method that range measurement principle formula is retrodicted with reference to the horizontal-associate line current after optimization, It calculates shown in the reactance of circuit unit and anti-thunder circle impedance value such as formula (4),

It takes and acquires the reactance of circuit unit and anti-thunder circle impedance value according to the data of same section different faults point or acquire repeatedly The reactance of circuit unit and anti-thunder circle impedance value, take its average value, with obtain circuit unit reactance during accurately practical tripping and Anti- thunder circle impedance value.

4. the method that high ferro dimension pipe traction substation as described in claim 1 promotes fault localization precision, it is characterised in that： In the step 2, for determining the reactance of circuit unit and anti-thunder circle impedance value, in order to allow trouble point in the opposite of fault section Distance is more accurate, range unit is made more accurately to indicate trouble point kilometer post, specifically with the following method：

Failure calibration formula during according to T line failures

When for F or TF failures, LT in formula (5) is changed to LF or LTF,

As n=2, fault distance L is modified to L '=L-2*L2.

5. the method that high ferro dimension pipe traction substation as claimed in claim 3 promotes fault localization precision, it is characterised in that：Institute The calculating for stating trouble point kilometer post includes：

During according to more than failure calibrated and calculated, also need accurately to determine traction substation, AT institutes, subregion institute kilometer post, determine each institute Online power supply line length, length between site on contact net section, check and correction PT pressures mutually, CT flow mutual no-load voltage ratio, flow mutual polarity, pair thus survey The input and verification of system and device parameter；

By the horizontal-associate line current after optimization than range measurement principle formula (2), accurate unit reactance and anti-thunder circle impedance value and Perfect, the promotion fault localization precision of each underlying parameter.

6. the high ferro dimension pipe traction substation as described in claim 1,3,4, any one of 5 promotes the side of fault localization precision Method, it is characterised in that：Implementation to the step 2 needs to carry out fault localization pre-implementation preparatory work and short-circuit test Operation, specifically includes：

(1) accuracy of underlying parameter is confirmed, including site kilometer post, confession on traction substation, AT institutes, subregion institute supply lines Length between site in wire length and material type, contact net section, check and correction PT is mutually pressed, CT flows mutual no-load voltage ratio, CT flows mutual polarity, The measurement and confirmation of underlying parameter are carried out, the input and verification of parameter are carried out to fault localization system and device；

(2) it by contact net short-circuit test, verifies contact net physical fault range accuracy, while corrects fault localization system dress The reactance of T line F line units, anti-thunder circle equivalent reactance value are put, until fault localization precision reaches expected required precision.

7. the method that high ferro dimension pipe traction substation as claimed in claim 6 promotes fault localization precision, it is characterised in that： (1) underlying parameter described in confirms, specifically includes：

(1) establishment officer is to site kilometer post verification on the supply lines of each traction institute of traction substation；Traction substation contains AT institutes, subregion institute；

(2) surf the Internet power supply line length and the verification of material type, line length of powering draw to each of traction substation in establishment officer The measurement error of degree is less than 1 meter, while aerial aluminum stranded conductor or cable is distinguished and record its length respectively；Draw power transformation Contained AT institutes, subregion institute；

(3) to include drawing institute, AT institutes, subregion institute in pressure mutually, flow mutual no-load voltage ratio and check, especially feeder line stream is mutually protected Protect no-load voltage ratio, self coupling unsteady flow mutually protects no-load voltage ratio, the mutual no-load voltage ratio of stream in concentration grounding box；With mutual inductor characteristic tester test really The mutual protection no-load voltage ratio of constant current and flow mutual polarity；

(4) to fault location device definite value check, according to the underlying parameter of prophase nucleus pair respectively to each traction substation, AT institutes, Subregion fault location device definite value verification.

8. the method that high ferro dimension pipe traction substation as claimed in claim 6 promotes fault localization precision, it is characterised in that：Root According to the newest underlying parameter of (one) described revision, short-circuit test is carried out to each electric substation, verification feeder fault locating error Precision, short-circuit test operation specifically include：

(1) corresponding preparation is carried out in high ferro traction substation, Shen is handled by high ferro maintenance requirement by electric substation person on duty before experiment It please exit that traction substation main transformer is hauled oneself willingly into, inlet wire is hauled oneself willingly into, feeder line reclosing pressing plate and 1 tunnel of ac panel is switched to 10kV institutes With becoming 2 tunnels and to be set as 2 masters 1 standby；From each AT institutes, subregion institute Field Force to electricity adjust application exit AT institutes, subregion institute in own The soft pressing plate of o-volt protection of breaker；

(2) according to different line modes, short dot is determined；Experiment includes：Using the full method of operation in parallel, Bu Yue areas, electric substation Each supply arm the 1st AT sections of uplink F lines, full parallel operation mode are tested, and the 2nd AT sections of downgoing lines make T lines, T-F lines, straight It exits mode input by subregion for, complete in parallel, AT and is tested.

9. the method that high ferro dimension pipe traction substation as claimed in claim 8 promotes fault localization precision, it is characterised in that：Institute The setting for stating short dot includes：

(1) ground short circuit operational method；

(2) institute's pavilion back brake mode.

10. the method that high ferro dimension pipe traction substation as claimed in claim 9 promotes fault localization precision, it is characterised in that： (1) the ground short circuit operational method is grounded by permanent earth scheme, specifically included：1. associated contact net supply arm stops Electricity；2. use 25mm²Annealed copper strand wire warp nose one end is connect with Through ground wire, and the other end connects with contact net inclined cantilever current-carrying part It connects；3. traction substation correlation feeder line power transmission.