CN104677417A - Fault detection system and method for power transmission line - Google Patents

Fault detection system and method for power transmission line Download PDF

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Publication number
CN104677417A
CN104677417A CN201410818837.7A CN201410818837A CN104677417A CN 104677417 A CN104677417 A CN 104677417A CN 201410818837 A CN201410818837 A CN 201410818837A CN 104677417 A CN104677417 A CN 104677417A
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China
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module
fault
resistance
detection
output terminal
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CN201410818837.7A
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CN104677417B (en
Inventor
操礼峰
薛兵
周志黔
黄伟
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STATE GRID ANHUI POWER SUPPLY COMPANY OVERHAUL BRANCH
State Grid Corp of China SGCC
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State Grid Corp of China SGCC
Maintenace Co of State Grid Anhui Electric Power Co Ltd
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Abstract

The invention relates to a fault detection system and method for a power transmission line. The fault detection system comprises a main control circuit, a conductor vibration monitor, meteorological environment observation equipment, line monitoring equipment, a power failure detection module, a fault display module, a power supply module, a radio-frequency module, a fault detection module and a monitoring computer, wherein the fault detection module comprises a current sensor, a voltage sensor, an overcurrent protection module, an overvoltage protection module, a short-circuit fault judgment module and a grounding fault judgment module. In the fault detection device adopted by the invention, when a short-circuit fault occurs, an electronic switch can be automatically turned off within short time after being turned on; if the short-circuit fault is a transient fault, a current detection device detects no pulse current; if the fault is a permanent fault, the current detection device detects the pulse current, thereby whether the fault is the transient fault or the permanent fault can be judged, a reliable basis is provided for the subsequent fault handling and thus the inspection and maintenance speed of the line can be improved.

Description

A kind of fault detection system for transmission line of electricity and detection method thereof
Technical field
The present invention relates to a kind of ultra-high-tension power transmission line field of fault detection, specifically relate to a kind of fault detection system for transmission line of electricity and detection method thereof.
Background technology
At the high speed development along with national economy, the demand of all trades and professions to electric power is increasing, there is provided the quality of electric power supply (stability, continuity and adjoint service) to require also more and more higher to power supply department, the security of the therefore operation of power networks of remote ultra-high-tension power transmission line seems particularly important.
At present, China adopts 10KV circuit as the final step of high tension transmission, this quote very general, 10KV circuit has circuit route relative complex as the upper level power transmission sequence of mains voltage 220V, 380V, geographical environment rather harsh, there is the problem that line security runs, simultaneously because 10KV circuit is as the end of trunk high-tension line, its erection method and working environment cause the liability of line fault simultaneously; When 10KV circuit once break down, its lower line transformer can stop to customer power supply, and the corresponding transformer platform area subordinate user of this fault meeting assembly has a power failure and causes the loss of industrial and agricultural production, causes have a strong impact on the daily life of the masses.And currently used line fault testing device has poor real, rate of false alarm is high, the shortcoming that communication network merges cannot be realized.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of fault detection system for transmission line of electricity and detection method thereof, with the running status of conduct monitoring at all levels circuit and electrical network, avoid detecting error and causing power grid accident, improve real-time and the accuracy of wireline inspection.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of transmission line wire temperature online detection system, comprises governor circuit, conductor vibration monitor, weather environment scope, path monitoring equipment, detection of power loss module, malfunction coefficient module, power module, radio-frequency module and fault detection module, supervisory control comuter, described conductor vibration detector, weather environment scope are all connected with the input end of line detection module by the first wireless communication module, the described output terminal of wireline inspection equipment is connected with the input end of governor circuit, described detection of power loss module, the input end of malfunction coefficient module are connected with the output terminal of governor circuit, the output terminal of power module is connected with the input end of governor circuit, the output terminal of described governor circuit is connected with supervisory control comuter by the second wireless communication module, and the input end of described radio-frequency module is connected with the output terminal of governor circuit, described fault detection module comprises current sensor, voltage sensor, overcurrent protection module, overvoltage protective module, short trouble judge module and earth fault judge module, the output terminal of described current sensor is connected through the input end of overcurrent protection module with short trouble judge module, short trouble judge module is connected with main control module interactive mode, output terminal being connected with the input end of ground protection judge module through overvoltage protective module of described voltage sensor, earth fault judge module is connected with governor circuit interactive mode, the output terminal of described overcurrent protection module is connected with the input end of earth fault judge module, the output terminal of described overvoltage protective module is connected with the input end of short trouble judge module.
Further improvement as technique scheme:
Described detection system also comprises wire communication module and monitor terminal, and the input end of described wire communication module is connected with the output terminal of governor circuit, and its output terminal is connected with the input end of monitor terminal.
Described current foldback circuit is made up of the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, relay, PNP type triode, NPN triode, diode, reflective diode, described relay comprises a coil and a normally closed switch, the emitter of described positive-negative-positive three collector is connected with the output terminal of current sensor, the collector of described PNP type triode is connected with the anode of light emitting diode through the second resistance, the negative electrode of described light emitting diode is connected with one end of coil, the base stage of described PNP type triode is connected on the node between the 3rd resistance of series connection mutually and the 4th resistance, the other end of described 3rd resistance is connected with the emitter of PNP type triode through the first resistance, the other end of described 4th resistance is through the 5th resistance (R5) ground connection, the other end of described coil is connected on the 5th node between resistance and ground connection, the base stage of described NPN type triode is connected with the negative electrode of diode, the anode of diode is connected on the node between the first resistance and normally closed switch, the collector of described NPN type triode is connected with its base stage, the emitter of described NPN type triode is connected on the node between the 4th resistance and the 5th resistance, the other end of described normally closed switch is connected with short trouble judge module.
The method that transmission line wire temperature online detects, comprises the steps:
(1) current transformer gathers current parameters after overcurrent protection module, is transferred to short trouble judge module and earth fault judge module;
(2) voltage parameter of collection is also transferred to short trouble through overvoltage protective module and sentences by voltage sensor
Disconnected module and earth fault judge module;
(3) information collected is transferred to wireline inspection equipment by wireless transport module by transmission line of electricity vibration-detecting instrument and meteorological environmental observation equipment, and this equipment sends governor circuit to after the information received being processed;
(3) judged result is transferred to governor circuit by short trouble judge module and earth fault judge module respectively, and governor circuit carries out judgement process according to the information received according to fault type and abort situation point, and is shown by malfunction coefficient module;
(4) provide two kinds of different alarms respectively according to transient fault or permanent fault, and power supply signal is transferred to detection of power loss module, send warning message when monitoring power supply is less than normal working voltage, and governor circuit is quit work, prevent misoperation;
(5) fail operation status signal is passed through finite module Bulk transport to monitor terminal, sense terminals carries out manual maintenance according to the information received.
The invention has the beneficial effects as follows: fault detection system of the present invention and detection method thereof, by conductor vibration detector, weather environment scope, wireline inspection equipment, supervisory control comuter and monitor terminal ultra-high-tension power transmission line detected and process, combine the detection that factor that is meteorological and environment carries out circuit, avoid traditional detection circuit be in critical points detection less than drawback, improve the reliability of processing speed to trouble spot and judgement, avoid the drawback blindly relying on fault monitoring device monitoring fault.In the failure detector that the present invention adopts, during the fault that is short-circuited, electronic switch is connected in the rear short time and can be turned off voluntarily, if short trouble is transient fault, then current sensing means can't detect pulse current, if fault is permanent fault, current sensing means detects pulse current, can the type of failure judgement be transient fault or permanent fault thus, for the process of consequent malfunction provides reliable basis, thus the inspection speed of circuit can be improved.
Accompanying drawing explanation
Fig. 1 is system chart of the present invention;
Fig. 2 is the schematic diagram of overcurrent protection electric current.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1 and Figure 2, the transmission line wire temperature online detection system of the present embodiment, comprises governor circuit 1, conductor vibration monitor 2, weather environment scope 3, path monitoring equipment 4, detection of power loss module 5, malfunction coefficient module 6, power module 7, radio-frequency module 8, fault detection module 9, supervisory control comuter 12, wire communication module 14 and monitor terminal 15, conductor vibration detector 2, weather environment scope 3 are all connected with the input end of line detection module 4 by the first wireless communication module 10, the output terminal of wireline inspection equipment 4 is connected with the input end of governor circuit 1, the input end of detection of power loss module 5, malfunction coefficient module 6 is connected with the output terminal of governor circuit 1, the output terminal of power module 7 is connected with the input end of governor circuit 1, the output terminal of governor circuit 1 is connected with supervisory control comuter 12 by the second wireless communication module 11, and the input end of radio-frequency module 8 is connected with the output terminal of governor circuit 1, fault detection module 9 comprises current sensor 91, voltage sensor 92, overcurrent protection module 93, overvoltage protective module 94, short trouble judge module 95 and earth fault judge module 96, the output terminal of current sensor 91 is connected through the input end of overcurrent protection module 93 with short trouble judge module 95, short trouble judge module 95 is connected with main control module 1 interactive mode, output terminal being connected with the input end of ground protection judge module 96 through overvoltage protective module 94 of voltage sensor 92, earth fault judge module 96 is connected with governor circuit 1 interactive mode, the output terminal of overcurrent protection module 93 is connected with the input end of earth fault judge module 96, the output terminal of overvoltage protective module 94 is connected with the input end of short trouble judge module 95, the input end of wire communication module 14 is connected with the output terminal of governor circuit 1, and its output terminal is connected with the input end of monitor terminal 15.
Current foldback circuit 93 is made up of the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, relay 20, PNP type triode Q1, NPN triode Q2, diode D1, reflective diode D2, relay 20 comprises an a coil L and normally closed switch K, the emitter of positive-negative-positive three collector Q1 is connected with the output terminal of current sensor 91, the collector of PNP type triode Q1 is connected with the anode of light emitting diode D2 through the second resistance R2, the negative electrode of light emitting diode D2 is connected with one end of coil L, the base stage of PNP type triode Q1 is connected on the node between the 3rd resistance R3 of series connection mutually and the 4th resistance R4, the other end of the 3rd resistance R3 is connected with the emitter of PNP type triode Q1 through the first resistance R1, the other end of the 4th resistance R4 is through the 5th resistance R5 ground connection, the other end of coil L is connected on the node between the 5th resistance R5 and ground connection, the base stage of NPN type triode Q2 is connected with the negative electrode of diode D1, the anode of diode D1 is connected on the node between the first resistance R1 and normally closed switch K, the collector of NPN type triode Q2 is connected with its base stage, the emitter of NPN type triode Q2 is connected on the node between the 4th resistance R4 and the 5th resistance R5, the other end of normally closed switch K is connected with short trouble judge module 95.
Current transformer 91 gathers current parameters after overcurrent protection module 93, is transferred to short trouble judge module 95 and earth fault judge module 96; The voltage parameter of collection is transferred to short trouble judge module 95 and earth fault judge module 96 through overvoltage protective module 94 by voltage sensor 92; The information collected is transferred to wireline inspection equipment 4 by wireless transport module 10 by transmission line of electricity vibration-detecting instrument 2 and meteorological environmental observation equipment 3, and this equipment sends governor circuit 1 to after the information received being processed; Judged result is transferred to governor circuit 1 by short trouble judge module 95 and earth fault judge module 96 respectively, and governor circuit 1 carries out judgement process according to the information received, fault type and abort situation point, and is shown by malfunction coefficient module; Provide two kinds of different alarms respectively according to transient fault or permanent fault, and power supply signal is transferred to detection of power loss module 5, send warning message when monitoring power supply 7 is less than normal working voltage, and governor circuit 1 is quit work, prevent misoperation; Send fail operation status signal to monitor terminal 15 by finite module Bulk transport 14, sense terminals 15 carries out manual maintenance according to the information received.
Fault detection system of the present invention and detection method thereof, combine the detection that factor that is meteorological and environment carries out circuit, avoid traditional detection circuit be in critical points detection less than drawback, improve the reliability of processing speed to trouble spot and judgement, avoid the drawback blindly relying on fault monitoring device monitoring fault.In the failure detector that the present invention adopts, during the fault that is short-circuited, electronic switch is connected in the rear short time and can be turned off voluntarily, if short trouble is transient fault, then current sensing means 91 can't detect pulse current, if fault is permanent fault, current sensing means 91 detects pulse current, can the type of failure judgement be transient fault or permanent fault thus, for the process of consequent malfunction provides reliable basis, thus the inspection speed of circuit can be improved.
Those skilled in the art will be appreciated that; above embodiment is only used to the present invention is described; and be not used as limitation of the invention; as long as within spirit of the present invention, the suitable change do above embodiment and change all drop within the scope of protection of present invention.

Claims (4)

1. a transmission line wire temperature online detection system, is characterized in that: comprise governor circuit (1), conductor vibration monitor (2), weather environment scope (3), path monitoring equipment (4), detection of power loss module (5), malfunction coefficient module (6), power module (7), radio-frequency module (8) and fault detection module (9), supervisory control comuter (12), described conductor vibration detector (2), weather environment scope (3) is all connected by the input end of the first wireless communication module (10) with line detection module (4), the output terminal of described wireline inspection equipment (4) is connected with the input end of governor circuit (1), described detection of power loss module (5), the input end of malfunction coefficient module (6) is connected with the output terminal of governor circuit (1), the output terminal of power module (7) is connected with the input end of governor circuit (1), the output terminal of described governor circuit (1) is connected with supervisory control comuter (12) by the second wireless communication module (11), the input end of described radio-frequency module (8) is connected with the output terminal of governor circuit (1), described fault detection module (9) comprises current sensor (91), voltage sensor (92), overcurrent protection module (93), overvoltage protective module (94), short trouble judge module (95) and earth fault judge module (96), the output terminal of described current sensor (91) is connected through the input end of overcurrent protection module (93) with short trouble judge module (95), short trouble judge module (95) is connected with main control module (1) interactive mode, output terminal being connected with the input end of ground protection judge module (96) through overvoltage protective module (94) of described voltage sensor (92), earth fault judge module (96) is connected with governor circuit (1) interactive mode, the output terminal of described overcurrent protection module (93) is connected with the input end of earth fault judge module (96), the output terminal of described overvoltage protective module (94) is connected with the input end of short trouble judge module (95).
2. transmission line wire temperature online detection system according to claim 1, it is characterized in that: described detection system also comprises wire communication module (14) and monitor terminal (15), the input end of described wire communication module (14) is connected with the output terminal of governor circuit (1), and its output terminal is connected with the input end of monitor terminal (15).
3. transmission line wire temperature online detection system according to claim 1, is characterized in that: described current foldback circuit (93) is made up of the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), the 5th resistance (R5), relay (20), PNP type triode (Q1), NPN triode (Q2), diode (D1), reflective diode (D2); described relay (20) comprises a coil (L) and a normally closed switch (K), the emitter of described positive-negative-positive three collector (Q1) is connected with the output terminal of current sensor (91), the collector of described PNP type triode (Q1) is connected through the anode of the second resistance (R2) with light emitting diode (D2), the negative electrode of described light emitting diode (D2) is connected with one end of coil (L), the base stage of described PNP type triode (Q1) is connected on the node between the 3rd resistance (R3) of series connection mutually and the 4th resistance (R4), the other end of described 3rd resistance (R3) is connected through the emitter of the first resistance (R1) with PNP type triode (Q1), the other end of described 4th resistance (R4) is through the 5th resistance (R5) ground connection, the other end of described coil (L) is connected on the node between the 5th resistance (R5) and ground connection, the base stage of described NPN type triode (Q2) is connected with the negative electrode of diode (D1), the anode of diode (D1) is connected on the node between the first resistance (R1) and normally closed switch (K), the collector of described NPN type triode (Q2) is connected with its base stage, the emitter of described NPN type triode (Q2) is connected on the node between the 4th resistance (R4) and the 5th resistance (R5), the other end of described normally closed switch (K) is connected with short trouble judge module (95).
4. a method for transmission line wire temperature online detection, is characterized in that, comprise the steps:
(1) current transformer gathers current parameters after overcurrent protection module, is transferred to short trouble judge module and earth fault judge module;
(2) voltage parameter of collection is also transferred to short trouble through overvoltage protective module and sentences by voltage sensor
Disconnected module and earth fault judge module;
(3) information collected is transferred to wireline inspection equipment by wireless transport module by transmission line of electricity vibration-detecting instrument and meteorological environmental observation equipment, and this equipment sends governor circuit to after the information received being processed;
(3) judged result is transferred to governor circuit by short trouble judge module and earth fault judge module respectively, and governor circuit carries out judgement process according to the information received according to fault type and abort situation point, and is shown by malfunction coefficient module;
(4) provide two kinds of different alarms respectively according to transient fault or permanent fault, and power supply signal is transferred to detection of power loss module, send warning message when monitoring power supply is less than normal working voltage, and governor circuit is quit work, prevent misoperation;
(5) fail operation status signal is passed through finite module Bulk transport to monitor terminal, sense terminals carries out manual maintenance according to the information received.
CN201410818837.7A 2014-12-25 2014-12-25 A kind of fault detection system and its detection method for transmission line of electricity Active CN104677417B (en)

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Cited By (8)

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CN104865489A (en) * 2015-06-09 2015-08-26 国网山东济南市历城区供电公司 System and method for overhead line fault location and monitoring
CN105337580A (en) * 2015-11-26 2016-02-17 宁波柏人艾电子有限公司 Audio power amplification control circuit
CN105375884A (en) * 2015-11-24 2016-03-02 宁波柏人艾电子有限公司 Loudspeaker box power amplification circuit
CN106546874A (en) * 2016-09-30 2017-03-29 国网浙江省电力公司泰顺县供电公司 A kind of trouble point of the transmission line of electricity based on camera remotely judges system
CN107255770A (en) * 2017-05-12 2017-10-17 广东电网有限责任公司东莞供电局 Cable overhead line hybrid distributed formula feeder system
CN107302263A (en) * 2017-05-12 2017-10-27 广东电网有限责任公司东莞供电局 Self-healing property distributed intelligent control system
CN107728033A (en) * 2016-08-11 2018-02-23 现代自动车株式会社 For the device and method for the malfunction for predicting inverter
CN109633355A (en) * 2018-12-28 2019-04-16 徐亚琴 A kind of communication line power-off monitor

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CN104865489A (en) * 2015-06-09 2015-08-26 国网山东济南市历城区供电公司 System and method for overhead line fault location and monitoring
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CN107728033A (en) * 2016-08-11 2018-02-23 现代自动车株式会社 For the device and method for the malfunction for predicting inverter
CN106546874A (en) * 2016-09-30 2017-03-29 国网浙江省电力公司泰顺县供电公司 A kind of trouble point of the transmission line of electricity based on camera remotely judges system
CN107255770A (en) * 2017-05-12 2017-10-17 广东电网有限责任公司东莞供电局 Cable overhead line hybrid distributed formula feeder system
CN107302263A (en) * 2017-05-12 2017-10-27 广东电网有限责任公司东莞供电局 Self-healing property distributed intelligent control system
CN109633355A (en) * 2018-12-28 2019-04-16 徐亚琴 A kind of communication line power-off monitor

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