CN101648568A - Fault point location device of railway run-through line and location method - Google Patents
Fault point location device of railway run-through line and location method Download PDFInfo
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- CN101648568A CN101648568A CN200910023949A CN200910023949A CN101648568A CN 101648568 A CN101648568 A CN 101648568A CN 200910023949 A CN200910023949 A CN 200910023949A CN 200910023949 A CN200910023949 A CN 200910023949A CN 101648568 A CN101648568 A CN 101648568A
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Abstract
The invention discloses a fault point location device of a railway run-through line and a location method. The device comprises a high voltage bridge and a sound pressure synchronous pace voltage location device, wherein, a bridge circuit comprises an inner bridge arm circuit, an outer bridge arm and a high-power high-voltage power, the high-voltage power is connected with a pulse width modulatorcircuit and a high-frequency transformer in turn through a switch power circuit, the output end of the high-frequency transformer is connected with a voltage doubling rectifying circuit, the voltage doubling rectifying circuit is connected with a current measurement circuit and a voltage measurement circuit, the voltage doubling rectifying circuit is connected with a balance potentiometer of the inner bridge arm of the high voltage bridge, the balance potentiometer is connected with a measurement reference phase wire and a fault phase wire, and the sound pressure synchronous pace voltage location device is connected with a detector and a receiver by a location power. The invention has the advantages of simple structure, convenient operation and fast location of line fault point with no need of climbing a wire pole, can be widely applied to railway, electrical power and other enterprises and public institutions, and also can be used in the fault point location of high-and-low voltage cable insulation defect over the ground.
Description
Technical field
The present invention relates to railway run-through line fault localization field, be specifically related to the method for railway run-through line localization of fault device and location.
Background technology
Railway run-through line is mainly being born the power supply of railway signal along the line, is also bearing along the line the life power supply away from the little station in city, and the downline total length distributes, and its reliability is significant to train traffic safety.Railway run-through line is divided into two kinds of most of aerial line and fraction cable lines, and it is densely populated or be not suitable for the place of aerial line that cable line mainly is distributed in city, tunnel, bridge etc.
Fault for cable line in the railway run-through line has pre-determined bit and the accurate location that ripe way and equipment carry out the trouble point at present; And as the dominance fault that belongs to human eye and can observe directly, also be easy to search by line walking for the fault of aerial line, but can't there be good method before this by observed hidden failure for human eye, exist the operating maintenance personnel to observe or further to survey insulation inspection, investigation by the shaft tower pole-climbing, waste time and energy very much, and dangerous.
Summary of the invention
The objective of the invention is to propose a kind of structure tube list, use and easy to operate, but not pole-climbing is with regard to the registration device of through track trouble point, at high speed detent rail road.
Another object of the present invention is the method that proposes a kind of aerial line localization of fault.
In order to overcome the deficiencies in the prior art, technical scheme of the present invention is to solve like this: railway run-through line localization of fault device, special character of the present invention is by a multifunction constant flow electronic type high-tension bridge, the synchronous step voltage fixed point apparatus of pressure sound is formed, above-mentioned said multifunction constant flow electronic type high-tension bridge circuit is again by the interior bridge arm circuit of high-tension bridge and outer brachium pontis, electronics galvanometer and electronic type high-power high voltage power supply are formed, its electronic type high-power high voltage power supply is connected with pulse-width modulation circuit by switching power circuit, pulse-width modulation circuit is connected with high-frequency transformer, high-frequency transformer is connected with voltage doubling rectifying circuit, high-frequency transformer one end is connected with current measurement circuit, the high direct voltage of voltage doubling rectifying circuit is connected with tension measuring circuit, the high direct voltage of voltage doubling rectifying circuit is connected with the balanced potentiometer of the interior brachium pontis of high-tension bridge, balanced potentiometer one termination is gone into reference to phase output terminal, the other end inserts the fault phase output terminal, the electronics galvanometer of multifunction constant flow electronic type high-tension bridge respectively by fault measuring with reference to phase output terminal, another is measured the fault phase output terminal and connects with reference to phase line and fault phase line; The synchronous step voltage fixed point apparatus of above-mentioned said pressure sound is connected with detector by the fixed point power supply, and detector is connected with receptor.
A kind of method that is applied in the localization of fault of railway run-through line aerial line, undertaken by following step:
1), utilizes general-duty insulation and the preliminary failure judgement of voltage with stand test equipment certain bar phase line in the aerial line of through track;
2), utilize multifunction constant flow electronic type high-tension bridge to carry out the pre-determined bit test, draw the trouble point Position Approximate, being the trouble point equals the percentage registration that two times of total track lengths multiply by the electric bridge indication apart from the distance of test lead, the reference phase output terminal 8 of electric bridge, the reference phase on witness mark phase output terminal 9 reception survey line roads, the measurement fault phase output terminal 11 of electric bridge, the fault phase on fault phase output terminal 12 reception side line roads, the output ground connection termination the earth of electric bridge, energising is boosted to electric bridge, the interior bridge arm balance potential device (7) of indication adjusting of observing galvanometer 10 makes electric bridge indication balance, the fault distance percentage registration the when dial reading of potential device is exactly bridge balance;
3), find the trouble point Position Approximate by above-mentioned pre-determined bit after, the pipeline rider can directly go the predetermined bit positions inspection, the pipeline rider with the fine observation circuit of eye whether ground connection, insulator whether explode, whether have foreign matter to overlap in the line, judge the dominance trouble point once more;
4), the hidden failure point that can't observe directly for pipeline rider's eyes utilizes the pinpoint function of this device to fix a point.The high tension supply of multi-functional electric bridge is selected the interrupted output function of fixed point, fixed point output inserts between fault phase line and the earth, test current flows into the earth by the shaft tower at place, trouble point, then the big ground surface under the shaft tower of trouble point is owing to the meeting formation passed through of fault current distributes with the surface potential gradient of the identical interrupted rule of this device high tension supply outgoing current, utilize not pole-climbing fixed point apparatus under 1-2 shaft tower before and after the predetermined bit positions, to fix a point on ground, penetrate detector 14 underground, the Potential distribution signal enters socket J8, sending into the amplifier of sending into U3 and peripheral cell composition after the step voltage signal conditioning circuit is handled amplifies, send into receptor 15 through socket J6 again after the amplification, by the indication of μ A indication gauge outfit, distribution signal is also sent into U1A simultaneously, the sound signal modulate circuit Filtering Processing that U1B and peripheral cell thereof are formed, send into U2A then, the amplifier that U2B and peripheral cell thereof are formed amplifies the back and realizes synchronous sound monitoring by socket EJ lug machine, ground should not have this regularity signals under the failure-free shaft tower, by judging with having or not of electric bridge high-voltage power supply output rule same signal specifically is that circuit or insulator on which shaft tower has problem, realizes that the not pole-climbing of faulty line hidden failure point is accurately fixed a point;
5), when the insulating resistance value of trouble point causes positioning signal too weak too greatly, can utilize burning of this device to fall the signal to noise ratio that resistance function reduces fault resistance raising fault location test.The high tension supply of multi-functional electric bridge is selected to burn output function, between its output high pressure reception side fault phase and the earth, boost to the device rated voltage and observe electric current indication 6, when electric current rises to greater than 3mA, then burn and finish, can carry out fault location test.
The present invention compared with prior art has structure tube list, use and easy to operate, but not pole-climbing is the characteristics of at high speed fault location point just, solved the problem of blindly searching on a large scale, especially preferably resolved the difficult problem of searching of insulator hidden failure point, it has:
Can burn the advantage of falling resistance when the fault resistance value is too big;
Pre-determined bit is dwindled the advantage of trouble point inspection scope greatly, and its power supply can be kept trouble point electric arc and makes ground observation more directly perceived;
Hidden failure is put the accurately advantage of fixed point of not pole-climbing.
Its key technical indexes has: measuring distance scope 30km, test voltage DC20kV, fixed point sensitivity 3mV, power supply DC48V/12Ah or AC220V.
Comprehensive above-mentioned advantage has shortened the breakdown repair time greatly, can be widely used in railway, and electric power, enterprise and institution also can be used for the location of high and low pressure cable ground insulation defective trouble point.
Description of drawings
Fig. 1 is the high voltage and constant current large power supply schematic block diagram of multifunctional high pressure constant current electronics electric bridge of the present invention;
Fig. 2 is the interior brachium pontis and the electronics galvanometer schematic block diagram of high-tension bridge;
Fig. 3 is the synchronous step voltage fixed point apparatus of a pressure sound schematic block diagram;
Fig. 4 is a multifunctional high pressure Constant Electric Current minor electric bridge electronics galvanometer basic circuit;
Fig. 5 is Fig. 1 basic circuit;
Fig. 6 is Fig. 3 basic circuit.
The specific embodiment
Accompanying drawing is embodiments of the invention.
Below in conjunction with accompanying drawing summary of the invention is described further:
Shown in accompanying drawing, a kind of railway run-through line fault locator is by a multifunctional high pressure Constant Electric Current minor high-tension bridge, the synchronous step voltage fixed point apparatus of pressure sound is formed, above-mentioned said multifunctional high pressure Constant Electric Current minor high-tension bridge circuit is again by the interior bridge arm circuit of high-tension bridge and outer brachium pontis, electronics galvanometer and electronic type high-power high voltage power supply are formed, its electronic type high-power high voltage power supply is connected with pulse-width modulation circuit 2 by switching power circuit 1, pulse-width modulation circuit 2 is connected with high-frequency transformer 3, high-frequency transformer 3 is connected with voltage doubling rectifying circuit 4, high-frequency transformer 3 one ends are connected with current measurement circuit 6, the high direct voltage of voltage doubling rectifying circuit 4 is connected with tension measuring circuit 5, the high direct voltage of voltage doubling rectifying circuit 4 is connected with the interior bridge arm balance potential device 7 of high-tension bridge, balanced potentiometer 7-termination is gone into reference to phase output terminal 8, the other end inserts fault phase output terminal 12, the electronics galvanometer 10 of multifunction constant flow electronic type high-tension bridge respectively by fault measuring with reference to phase output terminal 9, another is measured fault phase output terminal 11 and connects reference phase line and fault phase line to be measured; Brachium pontis, witness mark phase line and fault phase line constituted outer brachium pontis in wherein balanced potentiometer 7 constituted; The synchronous step voltage fixed point apparatus of above-mentioned said pressure sound is connected with detector 14 by fixed point power supply 13, and detector 14 is connected with receptor 15.
Described electronic type high-power high voltage power supply comprises by the synchronous step voltage fixed point of high-tension bridge power supply, pressure sound power supply, recessive high resistive fault and burns and fall the resistance power supply.
The output voltage of described electronic type high-power high voltage power supply is the continuous regulated power supply of 0kV～20kV.
The high-pressure section of described electronic type high-power high voltage power supply is a supplied by AC/DC electricity, and low-pressure section is the general dry battery power supply.
The electronics galvanometer that Figure 4 shows that the electronics electric bridge is 10 schematic circuit diagram among Fig. 2; the high tension supply of electric bridge forms the bridge measurement output signal and is connected to route survey to be measured with reference to phase line by reference phase output terminal 8 respectively through balanced potentiometer 7; fault phase output terminal 12 is connected to line fault phase line to be measured; the bridge measurement incoming signal is taken from route survey to be measured with reference to phase line by fault measuring with reference to phase output terminal 9 respectively; measure fault phase output terminal 11 line fault phase lines to be measured; and send into by protection diode D1; diode D2; diode D3; diode D4; capacitor C 3; capacitor C 4; capacitor C 5; capacitor C 6; resistance R 3; resistance R 4; resistance R 5; resistance R 6; resistance R 7; the front end signal modulate circuit that resistance R 8 is formed is protected Filtering Processing; sending into the U1 amplifier then amplifies; connect balance indication header by resistance R 10 again; socket J3 connects the sensitivity regulator potentiometer, and balanced potentiometer 7 has the balanced proportions calibrated disc and realizes the indication of ratio reading.Socket J1, socket J2, resistance R 1, resistance R 2, capacitor C 1, capacitor C 2 are power circuit.
Figure 5 shows that the schematic circuit diagram of electronic type high-power high voltage power supply, capacitor C 9, capacitor C 10, capacitor C 11, capacitor C 12, capacitor C 13, chip U2, chip U3, chip U4, chip U5, chip U6 form the auxiliary power circuit of high-power high voltage power supply.Chip U7 is to control and waveform generation and drives the crystal oscillator that specialized large scale integrated circuit chip U12 provides clock.The signal that chip U12 produces promotes power tube Q1, power tube Q2, power tube Q3, power tube Q4 by chip for driving U8, chip U9, chip U10, the chip U11 with photoelectrical coupler, and its output connects conventional high-frequency step-up transformer and further rises to the 20kV high pressure output that bridge method pre-determined bit and the synchronous step voltage fixed point of pressure sound need through conventional high-frequency and high-voltage voltage doubling rectifying circuit by socket J2.Chip U13 is that a power conversion module provides 5V power supply to digital circuit.Socket JP1, socket JP2, socket JP3, socket JP4 are gang socket, connect switch, potential device, indicator lamp on the panel.
Shown in Figure 6 is the synchronous step voltage fixed point apparatus of pressure sound schematic diagram.Capacitor C 27, capacitor C 28, socket J6, socket J7, chip U15, chip U16 are power circuits; The detector surface potential detection signal of coming in from socket J8 is through cond C22, cond C23, resistance R 32, R33, R34, R35, R36, R37, R38, R39, capacitor C 24, capacitor C 25, diode D6, diode D7, diode D8, diode D9, K2, the electric potential signal modulate circuit of forming carries out the filtering protection, sends into amplifier U14 and amplifies, and connects the indication gauge outfit through resistance R 41 outputs; The signal of coming in from socket J8 also inserts the sound synchronous circuit, this circuit is a kind of by capacitor C 15, capacitor C 16, capacitor C 17, capacitor C 18, capacitor C 19, capacitor C 20, capacitor C 21, resistance R 19, resistance R 22～resistance R 31, K1, chip U1, synchronous aud. snl. filtering, amplitude adjustment, amplifying signal modulate circuit that chip U2 forms, its output are received by standard headphone jack EJ and are realized the synchronous monitor function of sound on the synchronous earphone of sound.Indicator lamp L4 among the figure, resistance R 42 is formed power indicating circuit.
A kind of described device is applied in the method for railway run-through line aerial line localization of fault, is undertaken by following step:
1), utilizes general-duty insulation and the preliminary failure judgement of voltage with stand test equipment certain bar phase line in the aerial line of through track;
2), utilize multifunction constant flow electronic type high-tension bridge to carry out the pre-determined bit test, draw the trouble point Position Approximate, being the trouble point equals the percentage registration that two times of total track lengths multiply by the electric bridge indication apart from the distance of test lead, the reference phase output terminal 8 of electric bridge, fault measuring is with reference to the reference phase on phase output terminal 9 reception survey line roads, the measurement fault phase output terminal 11 of electric bridge, the fault phase on fault phase output terminal 12 reception side line roads, the output ground connection termination the earth of electric bridge, energising is boosted to electric bridge, the interior bridge arm balance potential device 7 of indication adjusting of observing galvanometer 10 makes electric bridge indication balance, the fault distance percentage registration the when dial reading of potential device is exactly bridge balance;
3), find the trouble point Position Approximate by above-mentioned pre-determined bit after, the pipeline rider can directly go the predetermined bit positions inspection, the pipeline rider with the fine observation circuit of eye whether ground connection, insulator whether explode, whether have foreign matter to overlap in the line, judge the dominance trouble point once more;
4), the hidden failure point that can't observe directly for pipeline rider's eyes utilizes the pinpoint function of this device to fix a point.The high tension supply of multi-functional electric bridge is selected the interrupted output function of fixed point, fixed point output inserts between fault phase line and the earth, test current flows into the earth by the shaft tower at place, trouble point, then the big ground surface under the shaft tower of trouble point is owing to the meeting formation passed through of fault current distributes with the surface potential gradient of the identical interrupted rule of this device high tension supply outgoing current, utilize not pole-climbing fixed point apparatus under 1-2 shaft tower before and after the predetermined bit positions, to fix a point on ground, penetrate detector 14 underground, the Potential distribution signal enters socket J8, sending into the amplifier of sending into U3 and peripheral cell composition after the step voltage signal conditioning circuit is handled amplifies, send into receptor 15 through socket J6 again after the amplification, by the indication of μ A indication gauge outfit, distribution signal is also sent into U1A simultaneously, the sound signal modulate circuit Filtering Processing that U1B and peripheral cell thereof are formed, send into U2A then, the amplifier that U2B and peripheral cell thereof are formed amplifies the back and realizes synchronous sound monitoring by socket EJ lug machine, ground should not have this regularity signals under the failure-free shaft tower, by judging with having or not of electric bridge high-voltage power supply output rule same signal specifically is that circuit or insulator on which shaft tower has problem, realizes that the not pole-climbing of faulty line hidden failure point is accurately fixed a point;
5), when the insulating resistance value of trouble point causes positioning signal too weak too greatly, can utilize burning of this device to fall the signal to noise ratio that resistance function reduces fault resistance raising fault location test.The high tension supply of multi-functional electric bridge is selected to burn output function, between its output high pressure reception side fault phase and the earth, boost to the device rated voltage and observe electric current indication 6, when electric current rises to greater than 3mA, then burn and finish, can carry out fault location test.
Actual conditions at railway run-through line, length of line after its fault segmentation generally at several kilometers to tens kilometer range, at first quoting high-tension bridge method principle carries out the trouble point pre-determined bit and has solved the problem of blindly searching on a large scale, shortened the breakdown repair time greatly, secondly near the pre-determined bit trouble point, adopt the synchronous step voltage method of pressure sound to carry out not pole-climbing pinpoint, efficient, safety, simple.
High-tension bridge method principle is introduced railway run-through line fault pre-determined bit, its electric bridge is a multifunction constant flow electronic type high-tension bridge, comprises that electronic type constant flow high pressure electric bridge and DC high-voltage power supply thereof, fault pinpoint burn with the electronic type constant flow high pressure pulse power, high resistive fault to fall resistance electronic type high tension supply.
After pre-determined bit is finished, apply pressure sound for circuit to be measured with the high-tension bridge pulse power of matched with devices and use the step voltage signal synchronously, pinpoint is carried out with the synchronous step voltage fixed point apparatus of pressure sound in ground under near the shaft tower trouble point of pre-determined bit.Certainly, this fixed point apparatus also can be used for the fixed point of high-low pressure cable ground insulation defective trouble point, and convenient.
Embodiment:
Certain Railway Bureau's bar railway run-through line insulation fault occurs and causes power failure.
1, field condition analysis
1.1 separate and other electrical equipments of faulty line bonded assembly such as voltage transformer etc., the fault of further confirming faulty line by the routine insulation and the way of voltage with stand test mutually.
Have or not construction along the line, the disaster situation 1.2 understand faulty line; Confirm the faulty line total length.
2, utilize multi-function electronic high voltage and constant current electric bridge to carry out the trouble point pre-determined bit
2.1 pre-determined bit wiring
It is one good with its terminal and the fault reliable short circuit of terminal mutually to look for, this good reference loop (with reference to outer brachium pontis) as the high-tension bridge test, the multifunctional high pressure constant current electronics electric bridge of this device is set to the electric bridge function, measurement device is received the reference phase line of faulty line to be measured by the panel sign with reference to mouth 8, simultaneously plant failure witness mark phase output terminal 9 is also received the reference phase line of faulty line to be measured, measurement device failure output terminal 12 is received the fault phase line of faulty line to be measured, simultaneously measurement device fault input end 11 is also received the fault phase line of faulty line to be measured, the device ground terminal can be abutted against the earth, the measurement signal process constitutes the current return of testing with reference to phase line and fault fault phase line by trouble point and the earth, and assurance device and operating personal work safety.
2.2 pre-determined bit operation
Check after the wiring by J3 to be connected to the electronics galvanometer source switch that sensitivity potential device on the panel starts multifunctional high pressure constant current electronics electric bridge, and dextrorotation puts sensitivity the highest, galvanometric amplifier U1 is charged for electronics; Start the source switch of the high-pressure section of multifunctional high pressure constant current electronics electric bridge, the auxiliary power circuit that the A1 of Fig. 5, U2, U3, U4, U5, U6, U13 and attached peripheral resistance, electric capacity, diode thereof are formed is charged, and U7, U12 are given in power supply the control and the waveform generator circuit of composition; The control apparatus panel knob that boosts is observed the panel amperemeter/ammtr and is made the high-voltage power supply outgoing current greater than 3mA, and be the bigger the better, boost is that U12 by Fig. 5 produces pulse-width modulation waveform and passes through U8 respectively, U9, U10, U11 drives Q1, Q2, Q3, Q4 exports high-power pulse-width signal, be connected to the output high-frequency step-up transformer through J2 again and boost to the highest 10kV, and be transformed to the highest 20kV through two voltage doubling rectifying circuit and go up mutually with fault by the reference that the output of the galvanometric balanced potentiometer of electronics is applied to circuit to be measured, adjust balanced potentiometer and make the galvanometer balance, this moment, galvanometer calibrated disc that balanced potentiometer is with promptly had a ratio reading p, then position of failure point is in L=p * 2 total lengths, as total length is 20km, ratio p is 30%, and then position of failure point is at the 12km place.Step-down, closing appliance source switch are finished in the pre-determined bit test.
3, trouble point pinpoint
3.1 simply estimate the line walking fixed point
Apparatus multifunction high voltage and constant current electronics electric bridge is put the fixed point function, identifying the output of will fixing a point by panel receives the fault phase and makes its terminal open circuit, the synchronous step voltage fixed point apparatus of pressure sound that carries complete equipment is to predetermined bit positions, the so left and right sides 1-2 of 12km place shaft tower inspection of embodiment, the output of starter gear high pressure also makes outgoing current greater than 10mA, be the bigger the better, see and have or not foreign matter overlap joint circuit, insulator blast codominance (obviously appreciiable fault) fault, or there is discharge off arcing phenomenon at the place, trouble point when high-voltage power supply acts on the trouble point, as seen then having realized fixed point.Should be as the invisible hidden failure that then belongs to by following 3.2 methods fixed point.
3.2 utilize the synchronous step voltage fixed point apparatus of pressure sound to carry out hidden failure point pinpoint
The detector 14 of assembling fixed point apparatus, its output is connected to the hand-held box 15 of receptor, driving the receiver power supply switch, fixes a point with the not pole-climbing that realizes hidden failure point in the potential gradient distribution of ground formation by the electric current of trouble point with detector detection high-voltage power supply in the ground under the left and right sides 1-2 of the 12km place of a predetermined bit positions embodiment like this shaft tower.The detected signal of detector is delivered to J8, the detector detection signal of coming in from socket J8 is through cond C22, cond C23, resistance R 32, R33, R34, R35, R36, R37, R38, R39, capacitor C 24, capacitor C 25, diode D6, diode D7, diode D8, diode D9, K2, the electric potential signal modulate circuit of composition carry out the filtering protection, send into amplifier U14 and amplify, connect the indication gauge outfit through resistance R 41 outputs; The signal that comes from socket J8 also inserts the sound synchronous circuit, this circuit is a kind of by capacitor C 15, capacitor C 16, capacitor C 17, capacitor C 18, capacitor C 19, capacitor C 20, capacitor C 21, resistance R 19, resistance R 22～resistance R 31, K1, chip U1, synchronous aud. snl. filtering, amplitude adjustment, amplifying signal modulate circuit that chip U2 forms, its output are received by standard headphone jack EJ and are realized the synchronous monitor function of sound on the synchronous earphone of sound.Have only under the shaft tower of trouble point the fixed point apparatus indication that signal is arranged, no signal under all the other shaft towers realizes not pole-climbing fixed point purpose.
Claims (6)
1, a kind of railway run-through line localization of fault device, it is characterized in that by a multifunction constant flow electronic type high-tension bridge, the synchronous step voltage fixed point apparatus of pressure sound is formed, above-mentioned said multifunction constant flow electronic type high-tension bridge circuit is again by the interior bridge arm circuit of high-tension bridge and outer brachium pontis, electronics galvanometer and electronic type high-power high voltage power supply are formed, its electronic type high-power high voltage power supply is connected with pulse-width modulation circuit (2) by switching power circuit (1), pulse-width modulation circuit (2) is connected with high-frequency transformer (3), high-frequency transformer (3) is connected with voltage doubling rectifying circuit (4), high-frequency transformer (3) one ends are connected with current measurement circuit (6), the high direct voltage of voltage doubling rectifying circuit (4) is connected with tension measuring circuit (5), the high direct voltage of voltage doubling rectifying circuit (4) is connected with the balanced potentiometer (7) of the interior brachium pontis of high-tension bridge, balanced potentiometer (7) one terminations are gone into reference to phase output terminal (8), the other end inserts fault phase output terminal (12), and the electronics galvanometer (10) of multifunction constant flow electronic type high-tension bridge is respectively by witness mark phase output terminal (9), another is measured fault phase output terminal (11) and connects with reference to phase line and fault phase line; The synchronous step voltage fixed point apparatus of above-mentioned said pressure sound is connected with detector (14) by fixed point power supply (13), and detector (14) is connected with receptor (15).
2,, it is characterized in that described multifunction constant flow electronic type high-tension bridge is become the pontic of multifunction constant flow electronic type high-tension bridge by balanced potentiometer, through track to be measured, electronics galvanometer mutual group according to the described railway run-through line localization of fault of claim 1 device.
3,, it is characterized in that described electronic type high-power high voltage power supply comprises that high-tension bridge power supply, the synchronous step voltage fixed point of pressure sound power supply, recessive high resistive fault burn and fall the resistance power supply according to the described railway run-through line localization of fault of claim 1 device.
4, according to claims 1 described railway run-through line localization of fault device, the output voltage that it is characterized in that described electronic type high-power high voltage power supply is the continuous regulated power supply of 0kV～20kV.
5, according to claims 1 described railway run-through line localization of fault device, the high-pressure section that it is characterized in that described electronic type high-power high voltage power supply is a supplied by AC/DC electricity, and low-pressure section is the general dry battery power supply.
6, the described device of a kind of claim 1 is applied in the method for air wire localization of fault in the railway run-through line, is undertaken by following step:
1), utilizes general-duty insulation and the preliminary failure judgement of voltage with stand test equipment certain bar phase line in the aerial line of through track;
2), utilize multifunction constant flow electronic type high-tension bridge to carry out the pre-determined bit test, draw the trouble point Position Approximate, being the trouble point equals the percentage registration that two times of total track lengths multiply by the electric bridge indication apart from the distance of test lead, the reference phase output terminal (8) of electric bridge, the reference phase on witness mark phase output terminal (9) reception survey line road, the measurement fault phase output terminal (11) of electric bridge, the fault phase on fault phase output terminal (12) reception side line road, the output ground connection termination the earth of electric bridge, energising is boosted to electric bridge, the interior bridge arm balance potential device (7) of indication adjusting of observing galvanometer (10) makes electric bridge indication balance, the fault distance percentage registration the when dial reading of potential device is exactly bridge balance;
3), find the trouble point Position Approximate by above-mentioned pre-determined bit after, the pipeline rider can directly go the predetermined bit positions inspection, the pipeline rider with the fine observation circuit of eye whether ground connection, insulator whether explode, whether have foreign matter to overlap in the line, judge the dominance trouble point once more;
4), the hidden failure point that can't observe directly for pipeline rider's eyes utilizes the pinpoint function of this device to fix a point, the high tension supply of multi-functional electric bridge is selected the interrupted output function of fixed point, fixed point output inserts between fault phase line and the earth, test current flows into the earth by the shaft tower at place, trouble point, then the big ground surface under the shaft tower of trouble point is owing to the meeting formation passed through of fault current distributes with the surface potential gradient of the identical interrupted rule of this device high tension supply outgoing current, utilize not pole-climbing fixed point apparatus under 1-2 shaft tower before and after the predetermined bit positions, to fix a point on ground, penetrate detector (14) underground, the Potential distribution signal enters socket J8, sending into the amplifier of sending into U3 and peripheral cell composition after the step voltage signal conditioning circuit is handled amplifies, send into receptor (15) through socket J6 again after the amplification, by the indication of μ A indication gauge outfit, distribution signal is also sent into U1A simultaneously, the sound signal modulate circuit Filtering Processing that U1B and peripheral cell thereof are formed, send into U2A then, the amplifier that U2B and peripheral cell thereof are formed amplifies the back and realizes synchronous sound monitoring by socket EJ lug machine, ground should not have this regularity signals under the failure-free shaft tower, by judging with having or not of electric bridge high-voltage power supply output rule same signal specifically is that circuit or insulator on which shaft tower has problem, realizes that the not pole-climbing of faulty line hidden failure point is accurately fixed a point;
5), when the insulating resistance value of trouble point causes positioning signal too weak too greatly, can utilize burning of this device to fall the signal to noise ratio that resistance function reduces fault resistance raising fault location test.The high tension supply of multi-functional electric bridge is selected to burn output function, between its output high pressure reception side fault phase and the earth, boost to the device rated voltage and observe electric current indication (6), when electric current rises to greater than 3mA, then burn and finish, can carry out fault location test.
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| CN102759686A (en) * | 2012-07-26 | 2012-10-31 | 山东科汇电力自动化有限公司 | Method for locating power cable faults |
| CN106405322A (en) * | 2015-07-31 | 2017-02-15 | 本德尔有限两合公司 | Expanded method and device for search of insulation faults by utilizing multi-functional testing current |
| CN106950474A (en) * | 2017-03-22 | 2017-07-14 | 哈红 | The upkeep operation method of railway automatic blocking line |
| CN111711129A (en) * | 2020-06-29 | 2020-09-25 | 中国化学工程第十一建设有限公司 | Construction method for searching and repairing fault of outer sheath of single-core high-voltage cable |
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2009
- 2009-09-17 CN CN200910023949A patent/CN101648568A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759686A (en) * | 2012-07-26 | 2012-10-31 | 山东科汇电力自动化有限公司 | Method for locating power cable faults |
| CN106405322A (en) * | 2015-07-31 | 2017-02-15 | 本德尔有限两合公司 | Expanded method and device for search of insulation faults by utilizing multi-functional testing current |
| CN106405322B (en) * | 2015-07-31 | 2020-09-29 | 本德尔有限两合公司 | Method and apparatus for extended insulation fault search using multifunctional test current |
| CN106950474A (en) * | 2017-03-22 | 2017-07-14 | 哈红 | The upkeep operation method of railway automatic blocking line |
| CN106950474B (en) * | 2017-03-22 | 2019-09-27 | 保定钰鑫电气科技有限公司 | The upkeep operation method of railway automatic blocking line |
| CN111711129A (en) * | 2020-06-29 | 2020-09-25 | 中国化学工程第十一建设有限公司 | Construction method for searching and repairing fault of outer sheath of single-core high-voltage cable |
| CN111711129B (en) * | 2020-06-29 | 2021-08-17 | 中国化学工程第十一建设有限公司 | Construction method for searching and repairing fault of outer sheath of single-core high-voltage cable |
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