CN205157637U - Generator carbon brush current distribution monitoring system - Google Patents

Generator carbon brush current distribution monitoring system Download PDF

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Publication number
CN205157637U
CN205157637U CN201520817896.2U CN201520817896U CN205157637U CN 205157637 U CN205157637 U CN 205157637U CN 201520817896 U CN201520817896 U CN 201520817896U CN 205157637 U CN205157637 U CN 205157637U
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CN
China
Prior art keywords
carbon brush
current
signal
host computer
module
Prior art date
Application number
CN201520817896.2U
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Chinese (zh)
Inventor
孙长海
赵伟程
史晓龙
潘立刚
李军
吕鹏飞
Original Assignee
辽宁蒲石河抽水蓄能有限公司
大连理工大学
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Application filed by 辽宁蒲石河抽水蓄能有限公司, 大连理工大学 filed Critical 辽宁蒲石河抽水蓄能有限公司
Priority to CN201520817896.2U priority Critical patent/CN205157637U/en
Application granted granted Critical
Publication of CN205157637U publication Critical patent/CN205157637U/en

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Abstract

The utility model provides a generator carbon brush current distribution monitoring system mainly is applied to environment such as large hydropower station, thermoelectricity, water -storage power station. The utility model provides a generator carbon brush current distribution monitoring system, including direct current sensor, signal acquisition transmission case and host computer triplex, the direct current sensor adopts high accuracy current sensor, transmits the direct current collection transform back of every carbon brush for signal acquisition transmission case, signal acquisition transmission case converts the received current signal data signal into and transmits through the post -filter that goes to make an uproar gives the host computer, carries out data processing by the host computer and judges, the whole system is supplied power by 220V. Generator carbon brush current distribution monitoring system can carry out accuracy collection to the direct current signal under the strong jamming environment to through wireless transmission module, hold data transmission for telemonitoring. The whole system adopts integrated integrated design to in arranging the shielded cell in, guarantee the job stabilization nature of each component.

Description

Generator carbon brush distribution of current monitoring system

Technical field

The utility model relates to a kind of generator carbon brush electric current on-line detecting system, be mainly used in the environment such as large hydropower station, thermoelectricity, hydroenergy storage station, to in generator excited system, the real-time detection of each carbon brush running current, judge the ruuning situation of each carbon brush, and point out staff to overhaul in time, to reduce carbon brush fault, promote the carbon brush overall operation life-span, guarantee engine health stable operation.

Background technology

At present, China's power grid construction cause fast development, generating plant is as the important component part of Operation of Electric Systems, and its safe and stable operation is most important.In genset operational process, the serious and temperature of excitation system carbon brush abrasion is too high is the ubiquitous problem in domestic generating plant, and hydroenergy storage station is especially true.When generator carbon brush runs appearance exception, the electric current be distributed on each carbon brush also can change, and therefore monitors the distribution of current of each carbon brush, for judging carbon brush fault, guarantees that generator excited system stable operation tool is of great significance.

Utility model people find in factual survey, in the middle of prior art, normally irregularly adopt clamp reometer, infrared thermoviewer etc. to detect carbon brush ruuning situation by technician, but these two kinds of methods are all comparatively loaded down with trivial details, are difficult to the real time on-line monitoring realizing carbon brush operation conditions.

Utility model content

Technical problem to be solved in the utility model is tightly around the subject matter of generation current machine excitation system carbon brush runnability detection technique, comprising:

(1) infrared thermoviewer can only carry out timing monitoring to collector ring of generator and carbon brush, and need people to be fixed-point operation, real-time is poor, and the phenomenon that temperature is generated heat as carbon brush, there is the hysteresis quality of fault.

(2) personnel's observation expends too large for manpower, and is difficult to the carbon brush that judges to be about to break down.

In order to solve above technical matters, the utility model provides a kind of carbon brush distribution of current formula monitoring system, and this system mainly comprises three large technology contents:

(1) antijamming capability is strong, the DC current sensing technology that output current precision is high

(2) the sample and transform technology of small-signal under complex environment

(3) the mutual and Fault Pre judgment technology of man-machine interface

The utility model provides a kind of generator carbon brush distribution of current monitoring system, comprises DC current sensor, signals collecting transmission box and host computer three part;

DC current sensor adopts high precision electric current transducer, is transferred to signals collecting transmission box after the DC current collection of each carbon brush being converted; The current signal received is converted to digital signal and is transferred to host computer by signals collecting transmission box after noise-removed filtering, carries out data processing judgement by host computer; Whole system is powered by 220V.

DC current sensor comprises sensing element and transmission line, the brush pigtail of sensing element and carbon brush adopts non-immediate to be electrically connected, sensing element antijamming capability is strong, can auto-compensation mains voltage variations, the impact that the various factors such as temperature variation and external magnetic field interference bring.Transmission line adopts strip line, ensures the accuracy of signal transmission.Sensing element sends signals collecting transmission box to via transmission line after the collection of carbon brush current signal being converted.

Signals collecting transmission box comprises signal receiving module, noise-removed filtering module, D/A converter module and Double wire transmission module, and above-mentioned module connects successively.Signal accepts module and carries out collection modulation to the current signal that DC current sensor inputs, filtering and digital-to-analog conversion is carried out again by filtration module and D/A converter module, final signal sends workshop host computer and remote monitoring center to respectively by netting twine and Wireless Transmitter, monitored in real time by workshop host computer, remote monitoring center carries out storage arrangement to current data simultaneously, judging basis as a whole.

Workshop host computer is used for curent change display and system failure anticipation, the current signal change curve of collection can be shown in real time, by curent change trend, anticipation is carried out to carbon brush running status, set the current threshold that carbon brush normally runs simultaneously, when electric current exceed or lower than this current threshold time, system carries out automatic alarm, prompting staff carry out site inspection.

Outstanding advantages of the present utility model is under strong interference environment, to carry out accurate acquisition to DC current signal, and can pass through wireless transport module, sends the data to telemonitoring end.Whole system adopts integrated design, and is placed in shielded box, ensures the job stability of each element.Master system, by watchdog routine, can carry out intelligent decision to the current data collected, and prevents carbon brush fault early, ensures the safe and reliable operation of motor excitation system.

Accompanying drawing explanation

Fig. 1 is generator carbon brush distribution of current monitoring system measuring system framework map.

Fig. 2 is DC current sensor installation site schematic diagram.

Fig. 3 is signals collecting transmission box block diagram.

Fig. 4 is host computer observation interface schematic diagram.

In figure: 1 collector ring; 2 carbon brush; 3 sensing elements; 4 brush pigtails; 5 transmission lines.

Embodiment

Below in conjunction with accompanying drawing and technical scheme, further illustrate embodiment of the present utility model.

Fig. 1 is generator carbon brush distribution of current formula monitoring system framework map.DC current sensor is responsible for the big current signal on each carbon brush to carry out linear transformation, makes it meet the range requirement of signals collecting transmission box.Signals collecting transmission box is powered through D.C. regulated power supply after being introduced by 220V civil power.Signals collecting transmission box is responsible for the current signal gathering current sensor transmission, and carries out filtering and noise reduction, digital-to-analog conversion to signal, then transfers data to workshop host computer and remote monitoring center by transport module.The collection that each system can realize multichannel current signal is measured, and can meet the measurement demand in each genset workshop.

Fig. 2 is DC current sensor installation site schematic diagram.Sensor is fixed on the brush pigtail part of each carbon brush, is electrically connected with brush pigtail non-immediate.Sensor is transferred to signals collecting transmission box by responding to the current signal obtained via strip line.

Fig. 3 is signals collecting transmission box block diagram.Whole acquiring and transmission system by 220V civil power through DC voltage-stabilizing module for power supply.After current signal entering signal collect and transmit case, signals collecting transmission box first carries out noise-removed filtering process to it, get rid of the laggard line number mode convertion of external interference, the current-mode analog quantity collected is converted to digital quantity, one route netting twine directly accesses Workshop monitoring room, and another road is directly sent to remote monitoring center by wireless transmitter module after serial ports conversion.

Fig. 4 is host computer observation interface schematic diagram.Can demonstrate the carbon brush current distributions of genset in interface, the electric current of each carbon brush can carry out the display of electric current real-time curve.By system algorithm, the current data gathered is analyzed.When carbon brush electric current excessive or too small time, in interface, the display of corresponding carbon brush will carry out flicker alarm; Rule of thumb, enumerate possible failure cause simultaneously, carry out investigation maintenance for personnel.

Claims (3)

1. a generator carbon brush distribution of current monitoring system, is characterized in that, this generator carbon brush distribution of current monitoring system comprises DC current sensor, signals collecting transmission box and host computer three part; DC current sensor is transferred to signals collecting transmission box after the DC current collection of each carbon brush being converted; The current signal received is converted to digital signal and is transferred to host computer by signals collecting transmission box after noise-removed filtering, carries out data processing judgement by host computer; Whole system is powered by 220V;
DC current sensor comprises sensing element and transmission line, and the brush pigtail of sensing element and carbon brush adopts non-immediate to be electrically connected, and sensing element sends signals collecting transmission box to via transmission line after being converted by the carbon brush current signal collected;
Signals collecting transmission box comprises signal receiving module, noise-removed filtering module, D/A converter module and Double wire transmission module, and above-mentioned module connects successively; Signal accepts module and carries out collection modulation to the current signal that DC current sensor inputs, carry out filtering and digital-to-analog conversion by filtration module and D/A converter module again, final signal sends host computer and remote monitoring center to respectively by netting twine and Wireless Transmitter.
2. generator carbon brush distribution of current monitoring system according to claim 1, is characterized in that, described DC current sensor adopts high precision electric current transducer.
3. generator carbon brush distribution of current monitoring system according to claim 1 and 2, is characterized in that, described transmission line adopts strip line.
CN201520817896.2U 2015-10-20 2015-10-20 Generator carbon brush current distribution monitoring system CN205157637U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520817896.2U CN205157637U (en) 2015-10-20 2015-10-20 Generator carbon brush current distribution monitoring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520817896.2U CN205157637U (en) 2015-10-20 2015-10-20 Generator carbon brush current distribution monitoring system

Publications (1)

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CN205157637U true CN205157637U (en) 2016-04-13

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105842567A (en) * 2016-05-25 2016-08-10 厦门义兰德机电工程有限公司 Monitoring device for single-phase multi-arm sliding contact line power supplying system
CN105933182A (en) * 2016-05-17 2016-09-07 哈尔滨电机厂有限责任公司 Information transmission simulation test bench for hydro-generator rotor parameter monitoring system
CN106291359A (en) * 2016-08-23 2017-01-04 辽宁工程技术大学 A kind of generator carbon brush electric current and carbon brush temperature online monitoring system and method
CN107345981A (en) * 2017-08-24 2017-11-14 国家电网公司 Current of generator brushes on-line monitoring system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105933182A (en) * 2016-05-17 2016-09-07 哈尔滨电机厂有限责任公司 Information transmission simulation test bench for hydro-generator rotor parameter monitoring system
CN105933182B (en) * 2016-05-17 2019-07-05 哈尔滨电机厂有限责任公司 Hydraulic generator rotor parameter monitoring system information transmits simulator stand
CN105842567A (en) * 2016-05-25 2016-08-10 厦门义兰德机电工程有限公司 Monitoring device for single-phase multi-arm sliding contact line power supplying system
CN106291359A (en) * 2016-08-23 2017-01-04 辽宁工程技术大学 A kind of generator carbon brush electric current and carbon brush temperature online monitoring system and method
CN107345981A (en) * 2017-08-24 2017-11-14 国家电网公司 Current of generator brushes on-line monitoring system

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