CN105467320A - Generator excitation carbon brush on-line monitoring system and monitoring method - Google Patents
Generator excitation carbon brush on-line monitoring system and monitoring method Download PDFInfo
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- CN105467320A CN105467320A CN201610033334.8A CN201610033334A CN105467320A CN 105467320 A CN105467320 A CN 105467320A CN 201610033334 A CN201610033334 A CN 201610033334A CN 105467320 A CN105467320 A CN 105467320A
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- carbon brush
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- current sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/346—Testing of armature or field windings
Abstract
The invention discloses a generator excitation carbon brush on-line monitoring system and monitoring method. The generator excitation carbon brush on-line monitoring system comprises a current sensor installed on the pigtail copper lead of a generator excitation carbon brush, and used for collecting and sampling excitation carbon brush current signals; a data monitoring server connected to the current sensor, collecting signals outputted by the current sensor, performing signal conditioning, data processing and data analysis, and displaying the current signals in real time; and a centralized control center in connection with the data monitoring server, receiving the instruction emitted by the data monitoring server, and performing corresponding motion response. The generator excitation carbon brush on-line monitoring system and monitoring method can accurately monitor generator excitation carbon brush signals, avoid false alarm, effectively reduce generating set load down and set shutdown rates and guarantee generating set stable operation.
Description
Technical field
The present invention relates to on-line monitoring field, particularly relate to generator excitation carbon brush on-line monitoring system and monitoring method.
Background technology
Due to reasons such as component materials homogeneity and processing, genset is in operational process, and its excitation carbon brush there will be the situation of current imbalance.Excitation carbon brush current imbalance can cause generator excitation slip ring and carbon brush heating up, to such an extent as to produce Huan Huo ﹑ and burn the faults such as brush pigtail, cause genset load to reduce even genset stopping accident, cause certain economic loss to enterprise.
Under normal circumstances, field operator's timing uses infrared thermometer to measure the temperature of collector ring and carbon brush, or judges generator carbon brush running status with pincerlike meter detection carbon brush electric current.
By the working condition of manual measurement, analysis, judgement excitation carbon brush, Real-time Collection excitation carbon brush electric current can not be accomplished, generator accident can be caused if any carelessness.
There is on-line monitoring equipment in the measurement for exciter current of generator, but it in use exists following problem:
(1) due to sensor or sensor mounting location, causing the current value of collection inaccurate, there is very large drift in the data of collection, to such an extent as to the warning that often makes a mistake, bring very large work puzzlement to field maintemance workman.
(2) frequency acquisition of existing on-line monitoring equipment is lower, is easy to cause real time data to lose.
Summary of the invention
The object of the invention is for above-mentioned technical matters; generator excitation carbon brush on-line monitoring system and monitoring method are provided; the signal of real-time accurate measurements generator excitation carbon brush, avoids the phenomenon of false alarm, effectively reduces the probability of genset load down and compressor emergency shutdown.
Technical scheme of the present invention:
For solving the problems of the technologies described above, generator excitation carbon brush on-line monitoring system provided by the invention, comprising:
Current sensor, it is arranged on the brush pigtail copper conductor of the excitation carbon brush of generator, for sampling the collection of excitation carbon brush current signal;
Data monitoring service device, it is connected with current sensor, and it gathers the output signal of current sensor, and carries out signal condition, data processing, data analysis, real-time display translation signal;
Centralized control center, it is connected with data monitoring service device, receives the instruction that data monitoring service device sends, and makes corresponding movement response; In the present invention, data monitoring service device and centralized control center are by LAN (Local Area Network) connecting communication.
Further, described data monitoring service device comprises connecting terminal block, collector, switch, industrial computer, relay, optical transmitter and receiver and display screen; Wherein,
Connecting terminal block, it is connected between current sensor and data monitoring service device;
Collector, for gathering the real-time excitation carbon brush current value that current sensor transmits, its one end is connected on connecting terminal block;
Switch, it is connected with collector, and it integrates the signal that collector gathers;
Industrial computer, receives by TCP/IP communication mode the signal that collector transmits, and processes signal, analyzes, send alarm command;
Relay, is connected with industrial computer, and it sends alarm command to centralized control center;
Optical transmitter and receiver, its one end is connected with industrial computer, and the other end is connected with centralized control center, and it is to centralized control center's signal transmission;
Display screen, is connected with industrial computer, and it shows the output signal of generator excitation carbon brush in real time.
Further, described current sensor is miniature open loop type current sensor, and it comprises magnetic core, Hall element, amplification appliance, and the output signal of current sensor is the voltage signal of 0-4V.
Further, the voltage of described current sensor is ± direct supply of 12V, its measurement range is ± 200A.
Further, the single channel frequency acquisition of described collector is 100Hz.
A method for above-mentioned generator excitation carbon brush on-line monitoring system monitoring current, comprises the following steps:
S1, by being arranged on the current sensor on the brush pigtail copper conductor of the excitation carbon brush of generator, carries out collection sampling to excitation carbon brush current signal;
S2, the signal of data monitoring service device to the output of current sensor be connected with current sensor gathers, and carries out signal condition, data processing, data analysis, and real-time display translation signal on a display screen;
S3, its centralized control center be connected with data monitoring service device receives the signal instruction that data monitoring service device sends, when the current signal of current sensor monitoring is not equal to predetermined value, data monitoring service device sends carbon brush current anomaly alerting signal to centralized control center.
A method for above-mentioned generator excitation carbon brush on-line monitoring system monitoring resistor, comprises the following steps:
S1, by being arranged on the current sensor on the brush pigtail copper conductor of the excitation carbon brush of generator, carries out collection sampling to the resistance of excitation carbon brush;
S2, the output signal of data monitoring service device to current sensor be connected with current sensor gathers, and carry out signal condition, data processing, data analysis, and show resistance signal in real time on a display screen, and be stored in the database of industrial computer;
S3, its centralized control center be connected with data monitoring service device receives the signal instruction that data monitoring service device sends, when the resistance signal of current sensor monitoring is not equal to predetermined value in time period T, data monitoring service device sends the alerting signal that carbon brush abrasion needs to safeguard to centralized control center.
Further, time period T is in step s3 not more than 1-3h.
Beneficial effect of the present invention:
Motor excitation carbon brush on-line monitoring system provided by the invention and monitoring method; the signal of real-time accurate measurements generator excitation carbon brush; avoid the phenomenon of false alarm, effectively reduce the probability of genset load down and compressor emergency shutdown, ensure that the stable operation of genset.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the data monitoring server connection diagram of the present invention;
Fig. 3 is the current sensor connection diagram of the present invention.
Wherein:
1. current sensor; 2. connecting terminal block; 3. collector; 4. switch; 5. industrial computer; 6. relay; 7. optical transmitter and receiver; 8. display screen; 9. brush pigtail copper conductor; 10. excitation carbon brush; 11. brush holders; 12. numerical control monitor servers; 13. centralized control centers.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
Fig. 1 is the structural representation of generator excitation carbon brush on-line monitoring system of the present invention, and it comprises:
Current sensor 1 is arranged on the brush pigtail copper conductor 9 of the excitation carbon brush of generator, for sampling the collection of excitation carbon brush current signal;
Data monitoring service device 12 is connected with current sensor 1, and it gathers the output signal of current sensor 1, and carries out signal condition, data processing, data analysis, real-time display translation signal;
Centralized control center 13 is connected with data monitoring service device 12, receives the instruction that data monitoring service device 12 sends, and makes corresponding movement response; In the present invention, data monitoring service device 12 and centralized control center 13 are by LAN (Local Area Network) connecting communication.
Fig. 2 is the data monitoring server connection diagram of the present invention, and data monitoring service device 12 comprises connecting terminal block 2, collector 3, switch 4, industrial computer 5, relay 6, optical transmitter and receiver 7 and display screen 8; Wherein,
Connecting terminal block 2 is connected between current sensor 1 and data monitoring service device 12, and data monitoring service device 12 provides power supply to current sensor 1, and the voltage of current sensor is ± direct supply of 12V, its measurement range is ± 200A.
The real-time excitation carbon brush current value that collector 3 transmits for gathering current sensor 1, its one end is connected on connecting terminal block 2, and its other end is connected with switch 4; Switch 4 integrates the signal that collector 3 gathers; The single channel frequency acquisition of described collector 3 is 100Hz, adopts high frequency collection, effectively ensure that the integrality of real time data.
Industrial computer 5 by the signal of TCP/IP communication mode reception collector 3 transmission, and processes signal, analyzes, and sends alarm command;
Relay 6 is connected with industrial computer 5, and it sends alarm command to centralized control center 13;
Optical transmitter and receiver 7 one end is connected with industrial computer 5, and the other end is connected with centralized control center 13, and it is to centralized control center 13 signal transmission;
Display screen 8 is connected with industrial computer 5, and it shows the live signal of generator excitation carbon brush in real time; Particularly, display screen 8 is with the real-time current value of the form of numeral, column diagram, curve map display excitation carbon brush and resistance value, and the real-time current value of excitation carbon brush and resistance value are stored in the database of industrial computer 5, realize reviewing of data.
In the present invention, described current sensor 1 is miniature open loop type current sensor, and it comprises magnetic core, Hall element, amplification appliance, and the output signal of current sensor is the voltage signal of 0-4V.Its concrete scheme of installation, as shown in Figure 3.Generator excitation part comprises brush holder 11, excitation carbon brush 10, and current sensor 1 is arranged on the brush pigtail copper conductor 9 that is connected with excitation carbon brush 10.
A method for generator excitation carbon brush on-line monitoring system monitoring current, comprises the following steps:
S1, by being arranged on the current sensor 1 on the brush pigtail copper conductor 9 of the excitation carbon brush 10 of generator, carries out collection sampling to excitation carbon brush output signal;
S2, the signal of the output of the data monitoring service device 12 pairs of current sensors 1 be connected with current sensor 1 gathers, and carry out signal condition, data processing, data analysis, and display translation signal in real time on display screen 8 on data monitoring service device 12;
Particularly, the real-time excitation carbon brush current value that the collector 3 on data monitoring service device 12 transmits for gathering current sensor 1, its one end is connected on connecting terminal block 2, and its other end is connected with switch 4;
Switch 4 integrates the signal that collector 3 gathers; Industrial computer 5 by the signal of TCP/IP communication mode reception collector 3 transmission, and processes signal, analyzes, and sends alarm command; Relay 6 is connected with industrial computer 5, and it sends alarm command to centralized control center 13; Optical transmitter and receiver 7 one end is connected with industrial computer 5, and the other end is connected with centralized control center 13, and it is to centralized control center 13 signal transmission; Display screen 8 is connected with industrial computer 5, and it shows the output signal of generator excitation carbon brush in real time.
S3, its centralized control center 13 be connected with data monitoring service device 12 receives the signal instruction that data monitoring service device 12 sends, when the current signal that current sensor 1 is monitored is not equal to predetermined value, data monitoring service device 12 sends carbon brush current anomaly alerting signal to centralized control center 13.
Particularly, when gather current signal and predetermined value unequal, when namely there are differences, data monitoring service device 12 sends carbon brush current anomaly alarm command, alarm command is sent to centralized control center 13 by intranet by the relay 6 on data monitoring service device 12, facilitate genset maintainer, get rid of in time, solve generator excitation carbon brush Problems existing.
A method for generator excitation carbon brush on-line monitoring system monitoring resistor, comprises the following steps:
S1, by being arranged on the current sensor 1 on the brush pigtail copper conductor 9 of the excitation carbon brush 10 of generator, carries out collection sampling to excitation carbon brush resistance signal;
S2, the output signal of the data monitoring service device 12 pairs of current sensors 1 be connected with current sensor 1 gathers, and carry out signal condition, data processing, data analysis, and display screen 8 on data monitoring service device 12 shows resistance signal in real time, and be stored in the database of industrial computer;
Particularly, the real-time excitation carbon brush resistance value that the collector 3 on data monitoring service device 12 transmits for gathering current sensor 1, its one end is connected on connecting terminal block 2, and its other end is connected with switch 4;
Switch 4 integrates the signal that collector 3 gathers; Industrial computer 5 by the signal of TCP/IP communication mode reception collector 3 transmission, and processes signal, analyzes, and sends alarm command; Relay 6 is connected with industrial computer 5, and it sends alarm command to centralized control center 13; Optical transmitter and receiver 7 one end is connected with industrial computer 5, and the other end is connected with centralized control center 13, and it is to centralized control center 13 signal transmission; Display screen 8 is connected with industrial computer 5, in real time the output signal of display generator excitation carbon brush.
S3, its centralized control center 13 be connected with data monitoring service device 12 receives the signal instruction that data monitoring service device 12 sends, when current sensor 1 monitor resistance signal continue to exceed 1-3h be not equal to predetermined value time, data monitoring service device 12 send to centralized control center 13 carbon brush abrasion need safeguard alerting signal.
Particularly; when the resistance signal gathered continues to exceed 1-3h and predetermined value is unequal; when namely there are differences; data monitoring service device 12 sends brush instruction; alarm command is sent to centralized control center 13 by intranet by the relay 6 on data monitoring service device 12, facilitates genset maintainer, detects in time, confirms carbon brush abrasion fault; timely replacing carbon brush, avoids the fault occurring genset load down and compressor emergency shutdown.
Motor excitation carbon brush on-line monitoring system provided by the invention and monitoring method; the signal of real-time accurate measurements generator excitation carbon brush; avoid the phenomenon of false alarm, effectively reduce the probability of genset load down and compressor emergency shutdown, ensure that the stable operation of genset.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (8)
1. generator excitation carbon brush on-line monitoring system, is characterized in that, comprising:
Current sensor, it is arranged on the brush pigtail copper conductor of the excitation carbon brush of generator, for sampling the collection of excitation carbon brush current signal;
Data monitoring service device, it is connected with current sensor, and it gathers the output signal of current sensor, and carries out signal condition, data processing, data analysis, real-time display translation signal;
Centralized control center, it is connected with data monitoring service device, receives the instruction that data monitoring service device sends, and makes corresponding movement response.
2. generator excitation carbon brush on-line monitoring system according to claim 1, is characterized in that, described data monitoring service device comprises connecting terminal block, collector, switch, industrial computer, relay, optical transmitter and receiver and display screen; Wherein,
Connecting terminal block, it is connected between current sensor and data monitoring service device;
Collector, for gathering the real-time excitation carbon brush current value that current sensor transmits, its one end is connected on connecting terminal block;
Switch, it is connected with collector, and it integrates the signal that collector gathers;
Industrial computer, receives by TCP/IP communication mode the signal that collector transmits, and processes signal, analyzes, send alarm command;
Relay, is connected with industrial computer, and it sends alarm command to centralized control center;
Optical transmitter and receiver, its one end is connected with industrial computer, and the other end is connected with centralized control center, and it is to centralized control center's signal transmission;
Display screen, is connected with industrial computer, and it shows the output signal of generator excitation carbon brush in real time.
3. generator excitation carbon brush on-line monitoring system according to claim 1, it is characterized in that, described current sensor is miniature open loop type current sensor, and it comprises magnetic core, Hall element, amplification appliance, and the output signal of current sensor is the voltage signal of 0-4V.
4. generator excitation carbon brush on-line monitoring system according to claim 1, is characterized in that, the voltage of described current sensor is ± and the direct supply of 12V, its measurement range is ± 200A.
5. generator excitation carbon brush on-line monitoring system according to claim 2, is characterized in that, the single channel frequency acquisition of described collector is 100Hz.
6. a method for the generator excitation carbon brush on-line monitoring system monitoring current in Claims 1 to 5 described in any one, is characterized in that, comprise the following steps:
S1, by being arranged on the current sensor on the brush pigtail copper conductor of the excitation carbon brush of generator, carries out collection sampling to the electric current of excitation carbon brush;
S2, the output signal of data monitoring service device to current sensor be connected with current sensor gathers, and carries out signal condition, data processing, data analysis, and real-time display translation signal on a display screen;
S3, its centralized control center be connected with data monitoring service device receives the signal instruction that data monitoring service device sends, when the current signal of current sensor monitoring is not equal to predetermined value, data monitoring service device sends carbon brush current anomaly alerting signal to centralized control center.
7. a method for the generator excitation carbon brush on-line monitoring system monitoring resistor in Claims 1 to 5 described in any one, is characterized in that, comprise the following steps:
S1, by being arranged on the current sensor on the brush pigtail copper conductor of the excitation carbon brush of generator, carries out collection sampling to the resistance of excitation carbon brush;
S2, the output signal of data monitoring service device to current sensor be connected with current sensor gathers, and carry out signal condition, data processing, data analysis, and show resistance signal in real time on a display screen, and be stored in the database of industrial computer;
S3, its centralized control center be connected with data monitoring service device receives the signal instruction that data monitoring service device sends, when the resistance signal of current sensor monitoring is not equal to predetermined value in time period T, data monitoring service device sends the alerting signal that carbon brush abrasion needs to safeguard to centralized control center.
8. the method for generator excitation carbon brush on-line monitoring system monitoring resistor according to claim 7, it is characterized in that, time period T is in step s3 not more than 1-3h.
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Cited By (6)
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| 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 |
| CN106291360A (en) * | 2016-08-30 | 2017-01-04 | 重庆勤智科技有限公司 | generator carbon brush fault locating method |
| CN107861062A (en) * | 2017-10-30 | 2018-03-30 | 重庆勤智科技有限公司 | Electric generating set rotor short circuit on-line monitoring system based on exciter current of generator synchronized sampling |
| CN108757323A (en) * | 2018-05-29 | 2018-11-06 | 国电联合动力技术有限公司 | Wind turbines carbon brush state intelligent monitoring system and its Wind turbines and control method |
| CN110459931A (en) * | 2019-09-04 | 2019-11-15 | 国电联合动力技术有限公司 | The monitoring device of real-time monitoring carbon brush length and carbon brush and Wind turbines including it |
| CN112098835A (en) * | 2020-08-07 | 2020-12-18 | 国家能源集团山东石横热电有限公司 | Remote real-time monitoring system for excitation carbon brush of generator |
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Application publication date: 20160406 |