CN110346722A - A kind of generator excited system on-line monitoring trouble-shooter - Google Patents
A kind of generator excited system on-line monitoring trouble-shooter Download PDFInfo
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- CN110346722A CN110346722A CN201910607646.9A CN201910607646A CN110346722A CN 110346722 A CN110346722 A CN 110346722A CN 201910607646 A CN201910607646 A CN 201910607646A CN 110346722 A CN110346722 A CN 110346722A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
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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
- G01R31/346—Testing of armature or field windings
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Abstract
The invention discloses a kind of generator excited systems to monitor trouble-shooter, including sensor acquisition unit, on-line monitoring processing unit on-line；Sensor acquisition unit acquires excitation system work state information, the work state information for the excitation system that on-line monitoring processor is acquired based on each sensor acquisition unit, Holographic test is carried out to unit, and according to excitation system fault tree, early warning and diagnosis are carried out using failure of the Fault Tree Analysis to excitation system, suggestion for operation is provided in time for operations staff, provides trouble shoot foundation for repair and maintenance personnel.
Description
Technical field
The present invention relates to a kind of generator excited systems to monitor trouble-shooter on-line, belongs to on-line monitoring and failure is examined
Disconnected technical field.
Background technique
Excitation system is that electrical energy production provides exciting current to generator in the process to establish the professional equipment in magnetic field, it is not
Only it is related to engine health stable operation, while also plays an important role to the stable operation of electric system.With single machine
Capacity is increasing, and excitation system is also increasing on the influence of the safety and stability in power plant and power grid, how to monitor excitation system
Operating status and evaluate its safety also and more seem important.Although excitation system largely uses microcomputer, control has certain intelligence
Energyization, and Intelligent self-diagnosis function is widely used, but due to the data operation and event handling amount of excitation system control computer
It is quite huge, therefore the self diagnosis of excitation system and intellectual monitoring function can not be exhaustive, especially when excitation system control
Correlated condition can not be just recorded when computer processed failure itself at all, brings extreme difficulties for crash analysis.
Generator excitation equipment is high-voltage great-current equipment, is easy to appear heating accident, is often easy to appear and goes out in operation
Magnetic switch, rectifier cabinet, de-excitation resistance, resistance-capacitance absorption resistance temperature are excessively high or the failures such as burn.The reason of these failures occur is more
Number is because not carrying out thermometric to the key equipment of excitation system.Traditional thermometric mode is usually when energizing apparatus inspection is specific
Between carry out the thermometric at the position, be unable to reach real-time monitoring, and some positions are unable to monitor, stop transport to equipment and monitoring is gone to lose again again
Go meaning.In addition such as high cabinet of the big voltage of resistance-capacitance absorption cabinet calorific value, when operation, need periodic monitoring cabinet and resistance electricity
Hold temperature, traditional manual measurement has very big security risk.
Summary of the invention
The purpose of the present invention is to provide a kind of generator excited systems to monitor trouble-shooter on-line, existing to solve
One of caused above-mentioned defects or defect in technology.
In order to achieve the above objectives, the present invention adopts the following technical solutions realization:
In a first aspect, the present invention provides a kind of generator excited systems to monitor trouble-shooter on-line, device includes:
Sensor acquisition unit, for acquiring the work state information of generator excited system；The sensor acquisition is single
Member includes power cabinet wind speed sensing, power cabinet current sensor, excitation system voltage-current sensor, demagnetization current sense
Device, de-excitation resistance temperature sensor, degaussing switch infrared thermoviewer, resistance-capacitance absorption cabinet temperature sensor, switching value acquisition module,
Stator current acquisition module.
Monitor processing unit, the work of the generator excited system for acquiring according to the sensor acquisition unit on-line
Status information is given warning in advance using failure of the Fault Tree Analysis to generator excited system, or to generator excitation system
The failure that system occurs is diagnosed.
Stator current acquisition module includes being opened by being clipped on stator current line what generator unit stator electric current was acquired
Box-like split core type current transformer.
Device further includes the monitoring display unit for showing the work state information of the excitation system.
Monitoring processing unit on-line includes analysis and processing module, generation module, memory module；
Analysis and processing module is used to analyze the work state information of generator excited system according to trigger condition,
Obtain the work state information for meeting trigger condition；The trigger condition includes alarm, limitation, failure；
The work state information that generation module is used to meet trigger condition generates wave file；
Memory module is used to store the wave file generated.
System further includes for showing excitation system instantaneous operating conditions information and according to excitation system history working condition
The mobile terminal unit for the history curve that information generates.
System further includes modbus gateway；The on-line monitoring processing unit is connect with modbus gateway communication, mobile whole
End unit is connected by way of network service with modbus gateway communication.
System further includes the work state information for obtaining the acquisition of sensor acquisition unit, and work state information is sent to
Monitor the data acquisition unit of processing unit on-line.
Preferably, data acquisition unit is connected by RS-485 with on-line monitoring processing unit.
De-excitation resistance temperature sensor includes fluorescence fiber temperature measurement instrument；Demagnetization current sensor includes Hall sensor.
A kind of generator excited system provided by the invention monitors trouble-shooter on-line, has the acquisition of complete data
Device, it can be achieved that generator excited system work state information real-time acquisition, to generator excited system carry out Holographic test；
According to the work state information of acquisition, given warning in advance using failure of the Fault Tree Analysis to generator excited system, and
The failure of generation is diagnosed.
Detailed description of the invention
Fig. 1 is a kind of opening up for generator excited system on-line monitoring trouble-shooter provided according to embodiments of the present invention
Flutter figure；
Fig. 2 is the mobile terminal topological diagram provided according to embodiments of the present invention；
Fig. 3 is the generator excited system on-line monitoring fault diagnosis fault tree signal provided according to embodiments of the present invention
Figure.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
The present embodiment provides a kind of generator excited systems to monitor trouble-shooter on-line, and referring to Fig.1, device includes passing
Sensor acquisition unit, on-line monitoring processing unit, data acquisition unit, mobile terminal unit, monitoring display unit, distribution are adopted
Collect module:
Sensor acquisition unit, including power cabinet wind speed sensing, power cabinet current sensor, excitation system voltage and current
Sensor, demagnetization current sensor, de-excitation resistance temperature sensor, degaussing switch infrared thermal imager, resistance-capacitance absorption cabinet temperature
Sensor.
Each sensor acquisition unit converts MODBUS for the signal of collected 4~20mA by data acquisition unit
Signal is uploaded to on-line monitoring processing unit；
CT is installed in power cell three-phase point of incoming cables, rectifier bridge bridge arm current is detected, for judging rectifier bridge
It is silicon-controlled whether to be connected, rectify the protection that whether bridge silicon controlled trigger pulse is normal, rectification is bridge silicon controlled and melt fastly and whether fuse；
Historical record by flowing situation to each bridge arm relatively can effectively judge silicon-controlled ageing state；
On the inside of power cell air-inlet grille, installation power cabinet wind speed sensing, air velocity transducer sends out 4~20mA signal
To the distributed data acquisition module of on-line monitoring unit, when wind speed is lower than setting value, triggering wind speed alarm, to power cabinet blower and
The operating status of strainer is judged；
Degaussing switch infrared thermal imager is installed in demagnetization unit, the degaussing switch infrared thermal imager is online
Infrared thermal imager, for monitoring the temperature of degaussing switch fracture and auxiliary contact；Online infrared thermal imager will measure
Complete temperature field image be transmitted to monitoring display unit；Visual field is divided into three key areas in monitoring display unit
Domain: fracture temperature 1, fracture temperature 2, auxiliary contact temperature, by the maximum temperature value in each region through Modbus gateway send to
The data acquisition unit concentration of line monitoring unit is acquired recording；When surveyed maximum temperature is greater than setting value, temperature is triggered
Alarm；Monitor the liquid crystal display that display unit is industrial personal computer and each equipment.
Demagnetization current sensor is installed in demagnetization unit, demagnetization current sensor includes Hall sensor, hall sensing
The current signal of test is converted to the data acquisition unit that on-line monitoring unit is sent to after 0~5V voltage signal by device, is used for
Monitor demagnetization electric current；Demagnetization electricity when in monitoring the data processing unit in unit on-line with collected excitation system demagnetization
Stream, multiplied by the drop-out voltage acquired by voltage transmitter, carries out accumulation calculating for product, obtains actual demagnetization capacity, go out
It can facilitate and be analyzed in the demagnetization capacity of display unit real-time display excitation system on the spot and the current value of test when magnetic, supervise
Survey the service condition of de-excitation resistance.
In de-excitation resistance unit in installation de-excitation resistance temperature sensor, the de-excitation resistance temperature sensor includes fluorescence
Optic fiber thermometer is sent to on-line monitoring through Modbus for monitoring the temperature of every group of de-excitation resistance, and by the temperature value of measurement
The data acquisition unit of unit；According to the temperature change of each de-excitation resistance, in conjunction with calculated demagnetization capacity, at data
Reason unit calculates the samming coefficient of de-excitation resistance, judges de-excitation resistance use state by samming index variation.
Online infrared temperature measurement apparatus is installed in the high resistance-capacitance absorption unit of working voltage, monitors air outlet temperature and resistance
The temperature of device, Resistance Fault caused by preventing temperature excessively high；Temperature test is carried out using online infrared temperature measurement apparatus, is reduced
The risk that operations staff manually patrols.
Sensor acquisition unit further includes regulation unit, and regulation unit includes for acquiring generator unit stator electricity
The stator current acquisition module of stream measures stator current, measurement using open-close type split core type current transformer in one embodiment
When open-close type split core type current transformer is clipped on original stator current line, mutual inductor converts the stator current of test in real time
It exports for the current signal of corresponding mA rank to on-line monitoring unit, this test method does not change the original electricity of excitation system
Flow measurement circuit；Regulation unit further includes the switching value acquisition module for acquiring excitation system switching value
On-line monitoring processing unit includes analysis and processing module, generation module, memory module, and analysis and processing module is used for root
According to trigger condition, the work state information of generator excited system is analyzed, obtains the working condition for meeting trigger condition
Information；The work state information that generation module is used to meet trigger condition generates wave file；Memory module is for storing life
At wave file；In one embodiment, on-line checking processing unit uses high-performance hardware platform, using coenocytism,
Include power panel, analog board, dsp board, CPU board, FPGA module, On-off signal output board.Have 12 road 100V voltages, 6
Road 5A electric current, 4 tunnel 4~20mA signals, 69 way switch amounts high-speed synchronous sampled measurements ability；And has communication abundant and connect
Mouthful.The analog signals such as acquisition generator unit stator voltage electric current, excitation voltage electric current, wind speed, temperature and excitation system are routinely opened
Input signal is measured in pass, is analyzed and processed through DSP and CPU board to data, after the trigger conditions such as satisfaction alarm, limitation, failure
All amounts of record are generated standard COMTRADE format wave file, is stored in inside device and synchronizes and send monitoring on the spot single
Member and mobile terminal unit.And judgement is carried out to Generator Excitation Faults, limitation, alarm in display unit on the spot and is shown,
Line monitors processing unit analyzing and diagnosing fault occurrence reason, and positioning failure source is above sent to monitoring display unit and mobile terminal；Dress
It sets with massage storage, data is recorded and acquired to running log and are stored for a long time, for being remembered by the history of big time span
Record relatively gives warning in advance to excitation certain device lifetimes, proposes system overhaul suggestion.
System is provided with mobile terminal unit, and referring to Fig. 2, on-line monitoring processing unit is connect with modbus gateway,
Modbus gateway turns wireless device with serial ports and connect, and collected all data are sent to mobile terminal list by being wirelessly connected
Member.Mobile terminal by way of network service with modbus gateway realize data dock, this mode can keep mobile terminal and
On-line monitoring system it is relatively independent.Mobile terminal unit can carry out realtime curve, switching value is accused by setting small routine
Alert analysis, analog quantity trend analysis can show excitation system real time data and according to historical data in on-line monitoring processing list
History curve is generated in member, and administrative staff is facilitated to check power equipment operating status.
Data acquisition unit is using RS-485 and on-line monitoring processing unit communication connection, for sensing power cabinet wind speed
Device, power cabinet current sensor, excitation system voltage-current sensor, demagnetization current sensor, de-excitation resistance temperature sensor,
4~20mA signal that degaussing switch infrared thermal imager, resistance-capacitance absorption unit temperature sensor export is uploaded at on-line monitoring
Manage unit.
Distributed data acquisition module is Analog input mModule, electric current, the wind speed letter of the power cell for acquiring 4~20mA
Number and resistance-capacitance absorption unit temperature signal, analog signals are converted into RS485 signal, are uploaded to by Modbus agreement
Modbus gateway.Now display unit is used to show the real time data of all collected analog quantitys and the status number of switching value
According to；Show alarm, the limitation, fault message issued after data processing unit is handled；Show the online infrared heat of demagnetization unit
The thermal imaging picture sent on imager；It shows the waveform sent on online monitoring unit, waveform is automatically analyzed.
The communication of power station other equipment and excitation on-line monitoring fault diagnosis system, connect with Modbus gateway.It supports
MODBUS-RTU MASTER/SLAVE communications protocol.When connecting with Power Station Monitored Control System, external default is MASTER, Modbus
Gateway is SLAVE, responds monitoring power station or protects the request of system.
Excitation monitors fault diagnosis system on-line and is configured with PT insurance molten function slowly in on-line monitoring unit.Generator machine
Holding the high-pressure side PT fuse to melt on-line monitoring slowly is to find that voltage transformer high-pressure side fuse change in resistance causes early
Secondary side Voltage Drop, cause excitation that cannot make accurate judgment, there is a situation where over-voltage or losss of excitation.Generator generator terminal excitation
PT melts the emphasis of on-line monitoring method slowly: voltage transformer high-pressure side is judged by negative sequence voltage, zero sequence voltage detection method
Change in resistance；The setting of negative sequence voltage operating valve value；The determination of live definite value.Since on-line monitoring system does not acquire neutral point electricity
Pressure monitors unit on-line to being collected so PT melts online evaluation method mainly using negative sequence voltage as judgment basis slowly
PT secondary side voltage decomposed, extract negative sequence voltage components, negative sequence voltage components and pre-set parameter are compared, when
Negative sequence voltage components think that the high-pressure side PT fuse melts slowly when being more than pre-set parameter, and the method needs while being latched stator to bear
Sequence electric current criterion.
On-line monitoring fault diagnosis system analyzes excitation system failure using Fault Tree Analysis, excitation system event
Hinder tree topology as shown in figure 3, wherein adjustment module is a module in excitation system, for providing out for on-Line Monitor Device
Guan Liang.In excitation system real time execution, system carries out fault detection if operating status is abnormal, and abnormal conditions include accusing
The abnormal operational conditions such as police, limitation, failure；It detects and main judges whether system breaks down and fault data is imported failure
In tree, and excitation system is passed through according to the generator of fault moment and excitation system measuring signal, generator real-time running data
Fault tree obtains the specific trouble location of the failure, fault type and fault severity level, is believed according to the specific failure being diagnosed to be
Breath provides the suggestion of unit troubleshooting and maintenance, provides suggestion for operation in time for operations staff, personnel provide failure for repair and maintenance
Search foundation.
A kind of generator excited system provided in an embodiment of the present invention monitors trouble-shooter, including acquisition excitation on-line
The sensor acquisition unit of system health information, the working condition of the excitation system based on the acquisition of each sensor acquisition unit
Information carries out Holographic test to unit, and according to excitation system fault tree, using Fault Tree Analysis to the failure of excitation system
Carry out early warning and diagnosis.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of generator excited system monitors trouble-shooter on-line, which is characterized in that described device includes:
Sensor acquisition unit, for acquiring the work state information of generator excited system；The sensor acquisition unit packet
It includes power cabinet wind speed sensing, power cabinet current sensor, excitation system voltage-current sensor, demagnetization current sensor, go out
Magneto-resistor temperature sensor, resistance-capacitance absorption cabinet temperature sensor, switching value acquisition module, is determined at degaussing switch infrared thermal imager
Electron current acquisition module.
Monitor processing unit, the working condition of the generator excited system for acquiring according to the sensor acquisition unit on-line
Information is given warning in advance using failure of the Fault Tree Analysis to generator excited system, or is sent out generator excited system
Raw failure is diagnosed.
2. generator excited system according to claim 1 monitors trouble-shooter on-line, which is characterized in that described fixed
Electron current acquisition module includes by being clipped on stator current line, and the open-close type being acquired to generator unit stator electric current is pincerlike electric
Current transformer.
3. generator excited system according to claim 1 monitors trouble-shooter on-line, which is characterized in that the dress
Setting further includes monitoring display unit for showing the work state information of the excitation system.
4. generator excited system according to claim 1 monitors trouble-shooter on-line, which is characterized in that it is described
It includes analysis and processing module, generation module, memory module that line, which monitors processing unit,；
The analysis and processing module is used to analyze the work state information of generator excited system according to trigger condition,
Obtain the work state information for meeting trigger condition；The trigger condition includes alarm, limitation, failure；
The work state information that the generation module is used to meet trigger condition generates wave file；
The memory module is used to store the wave file generated.
5. generator excited system according to claim 1 monitors trouble-shooter on-line, which is characterized in that the system
System further includes for showing excitation system instantaneous operating conditions information and being generated according to excitation system history work state information
The mobile terminal unit of history curve.
6. generator excited system according to claim 5 monitors trouble-shooter on-line, which is characterized in that the system
System further includes modbus gateway；The on-line monitoring processing unit is connect with modbus gateway communication, and mobile terminal unit passes through
The mode of network service is connected with modbus gateway communication.
7. generator excited system according to claim 1 monitors trouble-shooter on-line, which is characterized in that the system
System further includes the work state information for obtaining the acquisition of sensor acquisition unit, and work state information is sent at on-line monitoring
Manage the data acquisition unit of unit.
8. generator excited system according to claim 7 monitors trouble-shooter on-line, which is characterized in that the number
It is connected by RS-485 with on-line monitoring processing unit according to acquisition unit.
9. generator excited system according to claim 1 monitors trouble-shooter on-line, which is characterized in that described to go out
Magneto-resistor temperature sensor includes fluorescence fiber temperature measurement instrument.
10. generator excited system according to claim 1 monitors trouble-shooter on-line, which is characterized in that described
Demagnetization current sensor includes Hall sensor.
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Cited By (4)
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| CN112130067A (en) * | 2020-09-02 | 2020-12-25 | 国网天津市电力公司电力科学研究院 | Online monitoring system and monitoring identification method for magnetic leakage fault of large generator |
| CN112596493A (en) * | 2020-12-04 | 2021-04-02 | 沈阳航天新光集团有限公司 | Excitation controller test system for gas turbine generator set |
| CN113394749A (en) * | 2021-06-29 | 2021-09-14 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Loss-of-field and loss-of-step protection checking method based on real-time operation information |
| CN113791289A (en) * | 2021-08-17 | 2021-12-14 | 国家电网有限公司 | Special fault recording system for pumped storage power station |
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