CN105890672A - Online current and temperature monitoring and early-warning device for carbon brush of generator - Google Patents
Online current and temperature monitoring and early-warning device for carbon brush of generator Download PDFInfo
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- CN105890672A CN105890672A CN201610417945.2A CN201610417945A CN105890672A CN 105890672 A CN105890672 A CN 105890672A CN 201610417945 A CN201610417945 A CN 201610417945A CN 105890672 A CN105890672 A CN 105890672A
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- carbon brush
- current
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- temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The invention discloses an online current and temperature monitoring and early-warning device for a carbon brush of a generator. The online current and temperature monitoring and early-warning device for the carbon brush of the generator comprises main control equipment, a display output module and at least one carbon brush monitoring unit, wherein the carbon brush monitoring unit comprises a microcontroller, an analog-to-digital conversion unit, at least one current sensor and at least one temperature sensor; the microcontroller and the display output module are connected with the main control equipment separately; an alarm relay interface is arranged on the main control equipment; the current sensors are mounted on a loop of the carbon brush of the generator in a serially connected manner; the temperature sensors are mounted in the generator and are in contact with the carbon brush; the output ends of the current sensors and the temperature sensors are connected with the input ends of the analog-to-digital conversion unit and the microcontroller respectively. The online current and temperature monitoring and early-warning device for the carbon brush of the generator can collect the current and temperature of the carbon brush of the generator in real time, monitor and display the current and temperature of the carbon brush of the generator on line in real time, provide support for the detection and diagnosis of the carbon brush of the generator, output and upload an alarm when the current or the temperature is abnormal, and reduce a great amount of labor polling time cost.
Description
Technical field
The present invention relates to electric power project engineering field, be specifically related to a kind of generator carbon brush electric current and on-line temperature monitoring and prior-warning device.
Background technology
Generator carbon brush is to transmit energy or the device of signal between the standing part of electromotor and rotating part, the exciting current of electromotor is delivered to generator excitation winding by carbon brush, collector ring, and can the duty quality of carbon brush be related to electromotor and safe and stable run.The fault statistics of electromotor shows: carbon brush fault belongs to multiple fault, mainly include that carbon brush is beated fault, reason has that carbon brush thrust is improper, loosening, rotating shaft eccentric, collector ring ovality exceeds standard, there is sags and crests on collector ring surface or burns), carbon brush CURRENT DISTRIBUTION uneven, reason has that carbon brush is off quality, constant force spring pressure is inadequate or irregular, the carbon brush of different model mixed, the loose contact etc. contacting bad and shunt welding and carbon brush of carbon brush and slip ring.If the carbon brush of generating set is safeguarded and improper use will result in accident load down in operation, even shut down.The stopping accident caused because of carbon brush or collector rings of rotors fault for a long time, causes bigger economic loss to enterprise.
Carbon brush fault is caused to have electromagnetism, the many factors such as mechanically and chemically, and the most usual the temperature measuring collector ring and carbon brush by monitoring or detect carbon brush electric current combination infrared radiation thermometer judges carbon brush operation the most normally, the generator carbon brush electric current overwhelming majority at present simply takes electric current split-core type meter periodic detection to measure.At present market there is no or few this type of carbon brush electric current real time on-line monitoring and have the product of warning function, also there is no documents and materials and introduces its application.
Summary of the invention
The technical problem to be solved in the present invention: for the problems referred to above of prior art, a kind of electric current being capable of Real-time Collection generator carbon brush and temperature are provided, realize generator carbon brush electric current and temperature real time on-line monitoring shows, there is provided for generator carbon brush detection and diagnosis and support, may be implemented in electric current or the output of temperature anomaly alarm is uploaded, save the generator carbon brush electric current of a large amount of manpower monitoring time cost and on-line temperature monitoring and prior-warning device.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is:
A kind of generator carbon brush electric current and on-line temperature monitoring and prior-warning device, including main control device, display output module and at least one carbon brush monitoring means, described carbon brush monitoring means includes microcontroller, AD conversion unit, at least one current sensor and at least one temperature sensor, described microcontroller, display output module is connected with main control device respectively, described main control device is provided with alarm relay interface, described current sensor is installed in series on the loop of generator carbon brush, in described temperature sensor is arranged on electromotor and contact with carbon brush, described current sensor, the outfan of temperature sensor is connected with the input of microcontroller by AD conversion unit respectively.
Preferably, described AD conversion unit includes analog-digital converter U1, first resistance R1, second resistance R2, protective resistance RT, first stabilivolt TD1, second stabilivolt TD2 and at least two sensor interface JP1, the data transmit-receive terminal of described analog-digital converter U1 is connected with microcontroller, one input of described sensor interface JP1 is connected by one group of input of the first resistance R1 and analog-digital converter U1, another input is connected by another group input of the second resistance R2 and analog-digital converter U1, described protective resistance RT is connected in parallel between two inputs of sensor interface JP1, and an input of described sensor interface JP1 is by the first stabilivolt TD1 ground connection, another input passes through the second stabilivolt TD2 ground connection.
nullPreferably，Described analog-digital converter U1 is ADM2587E pattern number converter，Described AD conversion unit also includes the first electric capacity C1、Second electric capacity C2、3rd electric capacity C3、4th electric capacity C4 and the 5th electric capacity C5，The data sending terminal RS_TXD of described analog-digital converter U1、Data receiver RS_RXD、Enable Pin RS_EN is connected with microcontroller respectively，Described first electric capacity C1、Second electric capacity C2、3rd electric capacity C3 is arranged in parallel between the voltage input end VCC of analog-digital converter U1 and the first earth terminal GND1 respectively，Described 4th electric capacity C4 and the 5th electric capacity C5 one end are connected with the insulating power supply input visioin and insulating power supply outfan visioout of analog-digital converter U1 respectively、The other end and the second earth terminal GND2 are connected.
Preferably, the current measuring range of described current sensor is-100A～100A.
Preferably, the temperature measurement range of described temperature sensor is-25 DEG C～125 DEG C.
Preferably, described microcontroller is C8051F350 type microcontroller.
Generator carbon brush electric current of the present invention and on-line temperature monitoring and prior-warning device have an advantage that
1, the present invention includes main control device, display output module and carbon brush monitoring means, carbon brush monitoring means includes microcontroller, AD conversion unit, current sensor and temperature sensor, microcontroller, display output module is connected with main control device respectively, main control device is provided with alarm relay interface, current sensor is installed in series on the loop of generator carbon brush, in temperature sensor is arranged on electromotor and contact with carbon brush, current sensor, the outfan of temperature sensor is connected with the input of microcontroller by AD conversion unit respectively, it is capable of electric current and the temperature of Real-time Collection generator carbon brush, realize generator carbon brush electric current and temperature real time on-line monitoring shows, there is provided for generator carbon brush detection and diagnosis and support, save a large amount of manpower monitoring time cost
2, main control device of the present invention is provided with alarm relay interface, may be implemented in electric current or the output of temperature anomaly alarm is uploaded.
3, the quantity of the carbon brush monitoring means of the present invention, and in carbon brush monitoring means, current sensor and temperature sensor all can carry out integrated multiple or many groups as required, it is possible to meet extensive generator carbon brush electric current on-line monitoring and the needs of early warning.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is the circuit theory schematic diagram of embodiment of the present invention AD conversion unit.
Marginal data: 1, main control device；11, alarm relay interface；2, display output module；3, carbon brush monitoring means；31, microcontroller；32, AD conversion unit；33, current sensor；34, temperature sensor.
Detailed description of the invention
As shown in Figure 1, the generator carbon brush electric current of the present embodiment and on-line temperature monitoring and prior-warning device include main control device 1, display output module 2 and at least one carbon brush monitoring means 3, carbon brush monitoring means 3 includes microcontroller 31, AD conversion unit 32, four current sensors 33 and four temperature sensors 34, microcontroller 31, display output module 2 is connected with main control device 1 respectively, main control device 1 is provided with alarm relay interface 11, current sensor 33 is installed in series on the loop of generator carbon brush, in temperature sensor 34 is arranged on electromotor and contact with carbon brush, current sensor 33, the outfan of temperature sensor 34 is connected with the input of microcontroller 31 by AD conversion unit 32 respectively.It should be noted that the quantity of current sensor 33 and temperature sensor 34 can be arranged according to actual needs and select flexibly.
In the present embodiment, main control device 1 and display output module 2 use Taiwan prestige synthetic fibre to lead to MT8150IE type human-computer interaction device and realize, MT8150IE type human-computer interaction device comprise man machine interface show, touch operation screen, embedded WinCE system, system run all right, mouse action can be connect, 15 cun of 1024 × 768 TFTLCD, LED-backlit shows, fanless cooling system, builds 128MB flash memory, support that USB main equipment and USB are from equipment, supporting that SD card expands storage volume, isolator, NEMA4/IP65 front panel degree of protection are built in 485 communications, power supply.In addition it is also possible to use traditional computer and the form of display as required, its principle is identical with the present embodiment, does not repeats them here.Main control device 1 gathers, by RS485 bus, carbon brush electric current, the temperature real time data that each monitoring device obtains, most 128 road carbon brush information (customizable more than 128 roads) can be gathered by configuring, multiple alarming threshold value can be set, alarm relay output notifies staff in time, is provided simultaneously with the several functions such as query history curve, history alarm logging.Each carbon brush monitoring means 3 is shielded by four cores, and DC-9V is for electrically in parallel, and communication uses RS485 bus to be connected to main control device 1.Wiring is simple, safe and reliable.
As shown in Figure 2, AD conversion unit 32 includes analog-digital converter U1, first resistance R1, second resistance R2, protective resistance RT, first stabilivolt TD1, second stabilivolt TD2 and at least two sensor interface JP1, the data transmit-receive terminal of analog-digital converter U1 is connected with microcontroller 31, one input of sensor interface JP1 is connected by one group of input of the first resistance R1 and analog-digital converter U1, another input is connected by another group input of the second resistance R2 and analog-digital converter U1, protective resistance RT is connected in parallel between two inputs of sensor interface JP1, and an input of sensor interface JP1 is by the first stabilivolt TD1 ground connection, another input passes through the second stabilivolt TD2 ground connection.
As shown in Figure 2, analog-digital converter U1 is ADM2587E pattern number converter, ADM2587E pattern number converter uses isoPower integrated form isolation DC/DC technology, it it is the RS-485/RS-422 transceiver of a isolation, can be configured to half-or full-duplex pattern, traffic rate is respectively data rate: 16 Mbps/500kbps, uses 20 pin expanded letter SOIC encapsulation, pin compatibility, its operating temperature ratings scope is industrial temperature range (+85 ° of C of 40 ° of C to).ADM2587E pattern number converter, compared with other RS-485 interface chip, is integrated with Magnetic isolation technology and DC/DC power supply, is an integrated chip of single-chip RS-485 truly, greatly reducing pcb board area.As shown in Figure 2, AD conversion unit 32 also includes the first electric capacity C1, second electric capacity C2, 3rd electric capacity C3, 4th electric capacity C4 and the 5th electric capacity C5, the data sending terminal RS_TXD of analog-digital converter U1, data receiver RS_RXD, Enable Pin RS_EN is connected with microcontroller 31 respectively, first electric capacity C1, second electric capacity C2, 3rd electric capacity C3 is arranged in parallel between the voltage input end VCC of analog-digital converter U1 and the first earth terminal GND1 respectively, 4th electric capacity C4 and the 5th electric capacity C5 one end are connected with the insulating power supply input visioin and insulating power supply outfan visioout of analog-digital converter U1 respectively, the other end and the second earth terminal GND2 are connected.
In the present embodiment, the current measuring range of current sensor 33 is-100A～100A, it is possible to meet the current measurement demand of various types of electromotor.The temperature measurement range of temperature sensor 34 is-25 DEG C～125 DEG C, it is possible to meet the temperature survey demand of various types of electromotor.
In the present embodiment, microcontroller 31 is C8051F350 type microcontroller (MCU).C8051F350 type MCU is fully-integrated mixed signal SOC(system on a chip) type MCU.Key property is as follows: the C8051F350 with electrification reset in sheet, VDD monitor, WatchDog Timer and clock oscillator is the SOC(system on a chip) that really can work alone.FLASH memory also has in system reprogramming ability, can be used for non-volatile data storage, and allows on-the-spot renewal 8051 firmwares.All peripheral hardwares are had and control completely by user software, can turn off any one or all peripheral hardwares to save power consumption.
Utilize the generator carbon brush electric current of the present embodiment and on-line temperature monitoring and prior-warning device Real-time Collection generator excitation carbon brush electric current, temperature information, i.e. this locality shows the carbon brush electric current of electromotor in real time, (carbon brush number can be arranged variations in temperature according to field condition, customizable more than 128 roads), can Real-time Collection generator excitation carbon brush electric current, temperature information, i.e. this locality can show the carbon brush electric current of electromotor, variations in temperature in real time, the number simultaneously shown according to practical situation customizable carbon brush information, customizable more than 128 roads.Certainly, can also be further according to preset alarming value, when carbon brush electric current, temperature exceed preset alarming value, it is provided that electric current, temperature over-range alarm indicator, remind attendant's maintenance, the variation of electric current alarm criteria, is divided into low, high, high warning, or warning low according to meansigma methods, high, it is provided simultaneously with temperature height to report to the police, all there is output of reporting to the police accordingly, the equipment such as alarm lamp can be driven to notify staff in time, save a large amount of manpower monitoring time cost.
In the present embodiment, main control device 1 is after opening initialization completes, the output interface of display output module 2 by starting-up interface, automatically into main interface, present current value, temperature value, packet electric current and the value of main interface display all measurements carbon brush of display output module 2 and state, (report to the police, report to the police higher than meansigma methods: red by electric current height height；Electric current height is reported to the police: orange；The low warning of electric current, subaverage are reported to the police: blue；Temperature height is reported to the police: red).For all brushes, can (such as the 1st～20 carbon brush be A+ group by the self-defined grouping information arranging brush of display output module 2, 21st～40 carbon brush is A-group etc.), and difference type of alarm (the low warning of electric current, electric current height is reported to the police, electric current height height is reported to the police, electric current subaverage is reported to the police, electric current is reported to the police higher than meansigma methods, temperature height warning etc.) threshold values (threshold values of the low warning of such as electric current is 5A, the threshold values that electric current height is reported to the police is 80A, the threshold values that electric current height height is reported to the police is 100A, the threshold values that electric current subaverage is reported to the police is 60%, the threshold values that electric current is reported to the police higher than meansigma methods is 60%, the threshold values that temperature height is reported to the police is 70 degrees Celsius).When the threshold values of monitoring result coupling type of alarm, then exporting warning message, such as 2015/10/17 11:39:57 moment in real time by display output module 2, No. 5 carbon brush generation electric current height height are reported to the police, and current value is 100.0A, and recover in 2015/10/17 11:40:01 moment；It is also possible to inquire about alarm logging, the alarm logging of concrete Query Dates 2015/10/17 as desired by display output module 2, a record above can be inquired.Different according to selected carbon brush, the curve of the historical current of currently selected carbon brush, variations in temperature can be checked by display output module 2.It should be noted that, the above-mentioned functions realized by display output module 2 is the further improvement of the generator carbon brush electric current to the present embodiment and on-line temperature monitoring and prior-warning device, the realization of the generator carbon brush electric current of the present embodiment and on-line temperature monitoring and prior-warning device is not rely on the above-mentioned functions realized by main control device 1 and display output module 2, does not repeats them here.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-described embodiment, and all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that, for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (6)
- null1. a generator carbon brush electric current and on-line temperature monitoring and prior-warning device，It is characterized in that: include main control device (1)、Display output module (2) and carbon brush monitoring means (3)，Described carbon brush monitoring means (3) includes microcontroller (31)、AD conversion unit (32)、At least one current sensor (33) and at least one temperature sensor (34)，Described microcontroller (31)、Display output module (2) is connected with main control device (1) respectively，Described main control device (1) is provided with alarm relay interface (11)，Described current sensor (33) is installed in series on the loop of generator carbon brush，In described temperature sensor (34) is arranged on electromotor and contact with carbon brush，Described current sensor (33)、The outfan of temperature sensor (34) is connected with the input of microcontroller (31) by AD conversion unit (32) respectively.
- nullGenerator carbon brush electric current the most according to claim 1 and on-line temperature monitoring and prior-warning device，It is characterized in that: described AD conversion unit (32) includes analog-digital converter U1、First resistance R1、Second resistance R2、Protective resistance RT、First stabilivolt TD1、Second stabilivolt TD2 and at least two sensor interface JP1，The data transmit-receive terminal of described analog-digital converter U1 is connected with microcontroller (31)，One input of described sensor interface JP1 is connected by one group of input of the first resistance R1 and analog-digital converter U1、Another input is connected by another group input of the second resistance R2 and analog-digital converter U1，Described protective resistance RT is connected in parallel between two inputs of sensor interface JP1，And an input of described sensor interface JP1 is by the first stabilivolt TD1 ground connection、Another input passes through the second stabilivolt TD2 ground connection.
- nullGenerator carbon brush electric current the most according to claim 2 and on-line temperature monitoring and prior-warning device，It is characterized in that: described analog-digital converter U1 is ADM2587E pattern number converter，Described AD conversion unit (32) also includes the first electric capacity C1、Second electric capacity C2、3rd electric capacity C3、4th electric capacity C4 and the 5th electric capacity C5，The data sending terminal RS_TXD of described analog-digital converter U1、Data receiver RS_RXD、Enable Pin RS_EN is connected with microcontroller (31) respectively，Described first electric capacity C1、Second electric capacity C2、3rd electric capacity C3 is arranged in parallel between the voltage input end VCC of analog-digital converter U1 and the first earth terminal GND1 respectively，Described 4th electric capacity C4 and the 5th electric capacity C5 one end are connected with the insulating power supply input visioin and insulating power supply outfan visioout of analog-digital converter U1 respectively、The other end and the second earth terminal GND2 are connected.
- Generator carbon brush electric current the most according to claim 1 and on-line temperature monitoring and prior-warning device, it is characterised in that: the current measuring range of described current sensor (33) is-100A～100A.
- Generator carbon brush electric current the most according to claim 1 and on-line temperature monitoring and prior-warning device, it is characterised in that: the temperature measurement range of described temperature sensor (34) is-25 DEG C～125 DEG C.
- Generator carbon brush electric current the most according to claim 1 and on-line temperature monitoring and prior-warning device, it is characterised in that: described microcontroller (31) is C8051F350 type microcontroller.
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| CN201610417945.2A CN105890672A (en) | 2016-06-15 | 2016-06-15 | Online current and temperature monitoring and early-warning device for carbon brush of generator |
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| CN201610417945.2A CN105890672A (en) | 2016-06-15 | 2016-06-15 | Online current and temperature monitoring and early-warning device for carbon brush of generator |
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| CN114509173A (en) * | 2022-03-31 | 2022-05-17 | 东方电气集团东方电机有限公司 | Temperature monitoring module of carbon brush and intelligent monitoring device of generator |
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Application publication date: 20160824 |