CN105866614B - Steam turbine generator three-phase suddenly-applied short circuit detection device - Google Patents
Steam turbine generator three-phase suddenly-applied short circuit detection device Download PDFInfo
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- CN105866614B CN105866614B CN201610393376.2A CN201610393376A CN105866614B CN 105866614 B CN105866614 B CN 105866614B CN 201610393376 A CN201610393376 A CN 201610393376A CN 105866614 B CN105866614 B CN 105866614B
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- steam turbine
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- transient speed
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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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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The present invention discloses a kind of steam turbine generator three-phase suddenly-applied short circuit detection device.The rotor portion of torque sensor is rotated with tested rotor of steam turbo generator, the instantaneous torque and transient speed signals of acquisition steam turbine generator in real time, and pass through the stationary part that instantaneous torque and transient speed data are sent into torque sensor by wireless transmission, the instantaneous torque of acquisition and transient speed signals are transmitted to reconfigurable embedded system by the stationary part of torque sensor by signal connecting line, reconfigurable embedded system judges steam turbine generator instantaneous torque and transient speed with the presence or absence of mutation by program, the instantaneous three-phase suddenly-applied short circuit stage is in regard to that can judge that steam turbine generator is in the accident condition of three-phase suddenly-applied short circuit in steam turbine generator, instantaneous torque and transient speed data of the steam turbine generator under each operating mode can be recorded in real time simultaneously.
Description
Technical field：
The present invention relates to one kind to be used for steam turbine generator three-phase suddenly-applied short circuit on-line measuring device.
Background technology：
At present, thermal power plant protects motor using traditional great current mutual inductor measurement three-phase sudden short-circuit current.
Steam turbine generator three-phase suddenly-applied short circuit can be divided into two stages of transient state suddenly-applied short circuit and stable state suddenly-applied short circuit：Steam turbine generator three
Phase suddenly-applied short circuit first stage is the transient state suddenly-applied short circuit stage, in three-phase suddenly-applied short circuit initial instant, generator short circuit current
20-30 times of rated current is risen to, the electromagnetic force release huge energy that short circuit current flow is formed makes generator instantaneous torque and wink
When rotating speed generate abrupt transients, alternator shaft is formed it is irregular turn round shake, can crack rotor when serious, while short circuit
The thermal energy that electric current generates can burn winding bar insulation, short suddenly into stable state after the energy release of transient state suddenly-applied short circuit finishes
The road stage, at this time short circuit current flow be continuously 2-3 times of the rated current of generator, still can cause significant damage to unit.Tradition
Great current mutual inductor due to resolving accuracy and measuring range etc., the monitoring of substantial great current mutual inductor is steamer hair
The stable state sudden short-circuit current of motor three-phase suddenly-applied short circuit, i.e. the transient state suddenly-applied short circuit rank in steam turbine generator three-phase suddenly-applied short circuit
After section, the protective relaying device of thermal power plant just starts to act, and motor is protected.
The content of the invention：
The purpose of the present invention is disclosing a kind of steam turbine generator three-phase suddenly-applied short circuit detection device, can directly and accurately survey
The instantaneous torque of steam turbine generator and transient speed data are measured, steam turbine generator instantaneous torque and instantaneous turn are judged by program
Speed is in the instantaneous suddenly-applied short circuit stage with regard to that can judge that steam turbine generator is dashed forward in three-phase with the presence or absence of mutation in steam turbine generator
So in the accident condition of short circuit, while instantaneous torque and transient speed of the steam turbine generator under each operating mode can be recorded in real time
Data.The technical scheme is that：A kind of steam turbine generator three-phase suddenly-applied short circuit detection device：Tested steam turbine generator turns
The rotor portion of HBM-T40FM type torque sensors is installed, the rotor portion of HBM-T40FM type torque sensors is with vapour on son
Turbine generator rotor rotate, in real time gather steam turbine generator instantaneous torque and transient speed signals, and pass through wireless transmission will
Instantaneous torque and transient speed data are sent into the stationary part of HBM-T40FM type torque sensors, HBM-T40FM type torque sensings
The instantaneous torque of acquisition and transient speed signals are transmitted to CompactRIO-910X by the stationary part of device by signal connecting line
Reconfigurable embedded system, the reconfigurable embedded systems of CompactRIO-910X are to instantaneous torque and transient speed data
It is handled, the mutation there are transient speed and instantaneous torque is detected whether by embedded program, and will determine that result and wink
When torque and transient speed data be transmitted to Moxa AWK3121 type radio transmitting devices, Moxa AWK3121 types wireless transmission dress
It puts and will determine that result and instantaneous torque and transient speed data sending are wireless to D-LinkDIW-2370AP types by WiFi technology
Data sink, D-LinkDIW-2370AP types radio receiver is by Industrial Ethernet by instantaneous torque and transient speed
Data are transmitted to remote computer, the judging result and instantaneous torque and instantaneously turn that remote computer real-time display and storage upload
Fast data, and corresponding alarm signal is sent in the relay equipment of power plant.
Traditional great current mutual inductor due to resolving accuracy and measuring range supersaturation etc., have no idea in steamer
Transient current when measuring rotating speed and torque are mutated during generator suddenly-applied short circuit, what is substantially monitored is that steam turbine generator three-phase is dashed forward
So stable state sudden short-circuit current of short circuit, i.e., after the transient state suddenly-applied short circuit stage of steam turbine generator three-phase suddenly-applied short circuit,
The protective relaying device of thermal power plant just starts to act, and motor is protected.The HBM-T40FM type torque sensings that the present invention uses
Utensil has the characteristics of sample rate is high (reachable 3.8M sampled point per second), and precision is high (up to 0.1%), strong antijamming capability, energy
During steam turbine generator three-phase suddenly-applied short circuit directly, steam turbine generator instantaneous torque and transient speed letter are reliably gathered
Number, by the reconfigurable embedded systems of CompactRIO-910X with parallel data processing function, (resolution ratio of data can
Up to 25ns), it, can be in the transient state of three-phase suddenly-applied short circuit to detect the transient speed of steam turbine generator and torque with the presence or absence of mutation
Alarm signal is triggered in the process, reduces harm of the three-phase suddenly-applied short circuit transient process to motor, changes power plant for a long time
The original situation that can could be protected when Turbo-generator Set three-phase suddenly-applied short circuit switchs to stable state suddenly-applied short circuit.
WiFi (adopting wireless fidelity technology) more other wireless communication techniques that the present invention uses are fast with transmission speed, transmission distance
From the characteristics of remote, anti-electromagnetic interference capability is strong, and the bit error rate is low, the working environment of especially suitable power plant complexity.What the present invention used
Torque sensor has the characteristics that high sampling rate, just can change torque in the transient state suddenly-applied short circuit stage of three-phase suddenly-applied short circuit
It measures, is transferred on remote computer with rotation speed change, judge whether generator is in by the detection program of remote computer
The stage of three-phase suddenly-applied short circuit, and alarm signal is passed to the protective relaying device of thermal power plant, reduce the reaction time, reduce
Loss, for the safe operation of Turbo-generator Set provides new protection caused by steam turbine generator three-phase suddenly-applied short circuit accident
Measure.
Description of the drawings：
Fig. 1 inventive principle block diagrams
Fig. 2 present invention installation and work connection figure
Specific embodiment：
As shown in Figure 1, a kind of steam turbine generator three-phase suddenly-applied short circuit detection device, reconfigurable including torque sensor
Embedded system, wireless data transmission device, Wireless data receiving device, remote computer.
As shown in Fig. 2, HBM-T40FM types torque sensor is mounted between steam turbine generator 1 and pull-over gear 8, wherein
HBM-T40FM type torque sensors rotor portion 3 is directly installed on tested rotor of steam turbo generator 2, passes through wireless transmission
Mode will measure instantaneous torque in real time and transient speed signals are transferred to HBM-T40FM type torque sensors stationary part 4, HBM-
Instantaneous torque and transient speed signals are transferred to by T40FM type torque sensors stationary part 4 by RS422 data lines 5
In the reconfigurable embedded systems 6 of CompactRIO-910X, the reconfigurable embedded systems 6 of CompactRIO-910X are to instantaneous
Torque and transient speed data are handled, and detect whether that there are 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 transmitted on MoxaAWK3121 types radio transmitting device 7,
Moxa AWK3121 types radio transmitting device 7 leads to WiFi technology and will determine that result instantaneous torque and transient speed data transfer to D-
In LinkDIW-2370AP types Wireless data receiving device 9, D-LinkDIW-2370AP types Wireless data receiving device 9 passes through work
Industrial Ethernet will determine that result and instantaneous torque and transient speed data transfer to remote computer 10, are mounted with test software
The judging result and instantaneous torque and transient speed data that 10 real-time display of remote computer and storage upload, and will report accordingly
Alert signal is sent in the relay equipment of power plant.
Claims (1)
1. a kind of steam turbine generator three-phase suddenly-applied short circuit detection device, it is characterized in that：It is installed on tested rotor of steam turbo generator
The rotor portion of HBM-T40FM type torque sensors, the rotor portion of HBM-T40FM type torque sensors is with steam turbine generator
Rotor rotates, and gathers the instantaneous torque and transient speed signals of steam turbine generator in real time, and passes through wireless transmission by instantaneous torque
The stationary part of HBM-T40FM type torque sensors, the stator of HBM-T40FM type torque sensors are sent into transient speed data
It is reconfigurable that the instantaneous torque of acquisition and transient speed signals are partly transmitted to by CompactRIO-910X by signal connecting line
Embedded system, the reconfigurable embedded systems of CompactRIO-910X handle instantaneous torque and transient speed data,
Mutation there are transient speed and instantaneous torque is detected whether by embedded program, and will determine that result and instantaneous torque and wink
When rotary speed data be transmitted to Moxa AWK3121 type radio transmitting devices, Moxa AWK3121 type radio transmitting devices pass through WiFi
Technology will determine that result and instantaneous torque and transient speed data sending are received to D-LinkDIW-2370AP types wireless data and fill
It puts, D-LinkDIW-2370AP types radio receiver will determine that result and instantaneous torque transient speed number by Industrial Ethernet
According to remote computer is transmitted to, the remote computer real-time display of test software and judging result and the wink of storage upload are mounted with
When torque and 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 CN105866614A (en) | 2016-08-17 |
| CN105866614B true CN105866614B (en) | 2018-06-01 |
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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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| 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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| CN105866614A (en) | 2016-08-17 |
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