CN105866614A - Device for detecting three-phase sudden shorting of turbine generator - Google Patents
Device for detecting three-phase sudden shorting of turbine generator Download PDFInfo
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- CN105866614A CN105866614A CN201610393376.2A CN201610393376A CN105866614A CN 105866614 A CN105866614 A CN 105866614A CN 201610393376 A CN201610393376 A CN 201610393376A CN 105866614 A CN105866614 A CN 105866614A
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- instantaneous torque
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a device for detecting three-phase sudden shorting of a turbine generator. A rotor portion of a torque sensor rotates along with a turbine generator rotor to be detected; instantaneous torque and instantaneous rotating speed signals of the turbine generator are acquired in real time; instantaneous torque and instantaneous rotating speed data are wirelessly transmitted to a stator portion of the torque sensor; the stator portion of the torque sensor transmits acquired instantaneous torque and instantaneous rotating speed signals to a reconfigurable embedded system through a signal connecting line, the reconfigurable embedded system judges whether the instantaneous torque and the instantaneous rotating speed of the turbine generator suddenly change or not through a program, the three-phase sudden shorting accident state of the turbine generator can be judged when the turbine generator is in an instantaneous three-phase sudden short-circuit stage, and instantaneous torque and instantaneous rotating speed data of the turbine generator under various operating conditions can be recorded in real time.
Description
Technical field:
The present invention relates to a kind of for steam turbine generator three-phase suddenly-applied short circuit on-line measuring device.
Background technology:
At present, thermal power plant uses traditional great current mutual inductor to measure three-phase sudden short-circuit current,
Motor is protected.Steam turbine generator three-phase suddenly-applied short circuit can be divided into transient state suddenly-applied short circuit and
Two stages of stable state suddenly-applied short circuit: steam turbine generator three-phase suddenly-applied short circuit first stage is transient state
In the suddenly-applied short circuit stage, at three-phase suddenly-applied short circuit initial instant, generator short circuit current rises to volume
Determine electric current 20-30 times, the electromagnetic force release huge energy that short circuit current is formed, make electromotor
Instantaneous torque and transient speed produce abrupt transients, form alternator shaft and irregularly turn round shake,
Rotor can be made to crack time serious, the heat energy that short circuit current produces simultaneously can burn winding bar
Insulation, when transient state suddenly-applied short circuit energy discharge complete laggard enter the stable state suddenly-applied short circuit stage, this
Time short circuit current be continuously 2-3 times of the rated current of generator, still unit can be caused huge
Harm.Traditional great current mutual inductor due to resolving accuracy and measure the reason such as range, essence
What upper great current mutual inductor was monitored is the stable state suddenly-applied short circuit of steam turbine generator three-phase suddenly-applied short circuit
After electric current, i.e. the transient state suddenly-applied short circuit stage in steam turbine generator three-phase suddenly-applied short circuit terminate, fire
The protective relaying device of power plant just starts action, protects motor.
Summary of the invention:
It is an object of the invention to open a kind of steam turbine generator three-phase suddenly-applied short circuit detection device, energy
Enough instantaneous torque and transient speed data measuring steam turbine generator directly and accurately, pass through journey
Sequence judges whether steam turbine generator instantaneous torque and transient speed exist sudden change, at steam turbine generator
Being in the instantaneous suddenly-applied short circuit stage just can judge that steam turbine generator is in three-phase suddenly-applied short circuit
In accident condition, simultaneously can real time record steam turbine generator instantaneous torque under each operating mode
With transient speed data.The technical scheme is that a kind of steam turbine generator three-phase is unexpected
Short-circuit detecting device: install HBM-T40F type moment of torsion on tested rotor of steam turbo generator and pass
The rotor portion of sensor, the rotor portion of HBM-T40F type torque sensor is along with turbine generator
Machine rotor rotates, the instantaneous torque of Real-time Collection steam turbine generator and transient speed signals, and leads to
Cross to be wirelessly transferred and instantaneous torque and transient speed data are sent into HBM-T40F type torque sensing
The stationary part of device, the stationary part of HBM-T40F type torque sensor passes through signal connecting line
Instantaneous torque and the transient speed signals of collection are sent to CompactRIO-910X and can heavily join
Put embedded system, the reconfigurable embedded system of CompactRIO-910X to instantaneous torque and
Transient speed data process, and detect whether to there is transient speed and wink by embedded program
Time torque sudden change, and will determine that result and instantaneous torque and transient speed data are sent to
Moxa AWK3121 type radio transmitting device, Moxa AWK3121 type radio transmitting device
Will determine that result and instantaneous torque and transient speed data are sent to by WiFi technology
D-LinkDIW-2370AP type wireless data receive device, D-LinkDIW-2370AP type without
Line is received device and instantaneous torque and transient speed data is sent to remotely by EPA
Computer, remote computer shows in real time and stores the judged result and instantaneous torque and wink uploaded
Time rotary speed data, and corresponding alarm signal is sent in the relay equipment of power plant.
Traditional great current mutual inductor due to resolving accuracy and measure the reason such as range supersaturation,
Have no idea measuring rotating speed and the torque sudden change when steam turbine generator suddenly-applied short circuit time transient state electricity
Stream, substantially monitor is the stable state sudden short-circuit current of steam turbine generator three-phase suddenly-applied short circuit,
After i.e. the transient state suddenly-applied short circuit stage in steam turbine generator three-phase suddenly-applied short circuit terminates, thermal power plant
Protective relaying device just starts action, protects motor.The present invention uses
It is high (per second up to 3.8M sampled point) that HBM-T40FM type torque sensor has sample rate,
Precision is high (up to 0.1%), the feature that capacity of resisting disturbance is strong, can dash forward at steam turbine generator three-phase
So in short-circuit process directly, steam turbine generator instantaneous torque and transient speed letter are reliably gathered
Number, the reconfigurable embedding of CompactRIO-910X of function is processed by having parallel data
Formula system (resolution of data is up to 25ns), detect steam turbine generator transient speed and
Whether torque exists sudden change, it is possible to trigger alarm signal in the transient process of three-phase suddenly-applied short circuit
Number, reduce the harm to motor of the three-phase suddenly-applied short circuit transient process, change power plant for a long time
Just can only protect when Turbo-generator Set three-phase suddenly-applied short circuit transfers stable state suddenly-applied short circuit to
The original situation protected.
The YiFi (adopting wireless fidelity technology) that the present invention uses relatively other wireless communication technology has biography
Defeated speed is fast, long transmission distance, and anti-electromagnetic interference capability is strong, the feature that the bit error rate is low, especially
It is suitable for the working environment that power plant is complicated.The torque sensor that the present invention uses has high sampling rate
Feature, it is possible in transient state suddenly-applied short circuit stage of three-phase suddenly-applied short circuit just by torque change and rotating speed
Change is measured, and is delivered on remote computer, the detection program of remote computer judging
Whether motor is in the stage of three-phase suddenly-applied short circuit, and alarm signal passes to continuing of thermal power plant
Electrical protective device, decreases the response time, reduces steam turbine generator three-phase suddenly-applied short circuit accident
The loss caused, the safe operation for Turbo-generator Set provides new protective measure.
Accompanying drawing illustrates:
Fig. 1 inventive principle block diagram
Fig. 2 present invention installs and work connects figure
Detailed description of the invention:
As it is shown in figure 1, a kind of steam turbine generator three-phase suddenly-applied short circuit detection device, including moment of torsion
Sensor, reconfigurable embedded system, wireless data transmission device, wireless data receives dress
Put, remote computer.
As in figure 2 it is shown, HBM-T40FM type torque sensor is arranged on steam turbine generator 1 He
Between pull-over gear 8, wherein HBM-T40FM type torque sensor rotor portion 3 is directly pacified
It is contained on tested rotor of steam turbo generator 2, instantaneous by recording in real time by the way of being wirelessly transferred
Torque and transient speed signals are delivered to HBM-T40FM type torque sensor stationary part 4,
HBM-T40FM type torque sensor stationary part 4 passes through RS422 data line 5 by wink
Time torque and transient speed signals be delivered to the reconfigurable embedded system of CompactRIO-910X
On system 6, the reconfigurable embedded system of CompactRIO-910X 6 is to instantaneous torque and instantaneous
Rotary speed data processes, and detects whether to exist transient speed and instantaneous turn by embedded program
The sudden change of square, and will determine that result and instantaneous torque and transient speed data are sent to Moxa
On AWK3121 type radio transmitting device 7, Moxa AWK3121 type radio transmitting device 7
Will determine that result instantaneous torque and transient speed data are delivered to by YiFi technology
D-LinkDIW-2370AP type wireless data receives on device 9, D-LinkDIW-2370AP
Type wireless data receives device 9 and will determine that result and instantaneous torque and wink by EPA
Time rotary speed data pass to remote computer 10, be mounted with test software remote computer 10
Show in real time and store the judged result and instantaneous torque and transient speed data uploaded, and by phase
The alarm signal answered is sent in the relay equipment of power plant.
Claims (1)
1. a steam turbine generator three-phase suddenly-applied short circuit detection device, is characterized in that: tested steamer
The rotor portion of HBM-T40F type torque sensor, HBM-T40F are installed on generator amature
The rotor portion of type torque sensor rotates along with rotor of steam turbo generator, and Real-time Collection steamer is sent out
The instantaneous torque of motor and transient speed signals, and by being wirelessly transferred instantaneous torque and instantaneous
Rotary speed data sends into the stationary part of HBM-T40F type torque sensor, HBM-T40F type
The stationary part of torque sensor by signal connecting line by gather instantaneous torque and instantaneous turn
Speed signal is sent to the reconfigurable embedded system of CompactRIO-910X,
The reconfigurable embedded system of CompactRIO-910X is to instantaneous torque and transient speed data
Process, detect whether to exist the prominent of transient speed and instantaneous torque by embedded program
Become, and will determine that result and instantaneous torque and transient speed data are sent to Moxa AWK3121
Type radio transmitting device, Moxa AWK3121 type radio transmitting device passes through WiFi technology will
Judged result and instantaneous torque and transient speed data are sent to D-LinkDIW-2370AP type
Wireless data receive device, D-LinkDIW-2370AP type radio receiver by industry with
Too net will determine that result and instantaneous torque transient speed data are sent to remote computer, is mounted with
The remote computer of test software shows in real time and stores the judged result and instantaneous torque uploaded
With transient speed data, and corresponding alarm signal is sent in the relay equipment of power plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610393376.2A CN105866614B (en) | 2016-06-06 | 2016-06-06 | Steam turbine generator three-phase suddenly-applied short circuit detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610393376.2A CN105866614B (en) | 2016-06-06 | 2016-06-06 | Steam turbine generator three-phase suddenly-applied short circuit detection device |
Publications (2)
| Publication Number | Publication Date |
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| CN105866614A true CN105866614A (en) | 2016-08-17 |
| CN105866614B CN105866614B (en) | 2018-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610393376.2A Active CN105866614B (en) | 2016-06-06 | 2016-06-06 | Steam turbine generator three-phase suddenly-applied short circuit detection device |
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Families Citing this family (1)
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| EP4087119A1 (en) * | 2021-05-06 | 2022-11-09 | Siemens Gamesa Renewable Energy A/S | Method for detecting an electrical fault in the stator of an electric machine, especially in the generator of a wind turbine |
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