CN207741855U - Scaled bulb tubular hydraulic generator Damper Winding broken bar fault on-Line Monitor Device - Google Patents

Abstract

The utility model discloses a kind of scaled bulb tubular hydraulic generator Damper Winding broken bar fault on-Line Monitor Device, including is set to laser ranging locating module and infrared temperature probe module of the generator unit stator air duct close to air gap side；Laser ranging locating module tracks and the position in positioning amortisseur bar iron core surface temperature monitoring nearby region, and position data is sent to industrial personal computer by data communication module；Infrared temperature probe module acquires working rotor temperature, and position data is sent to industrial personal computer by data communication module.The utility model measures confidence level higher, has stronger anti-interference, can preferably implement continued power, realizes consistently online monitoring, and avoids the failure of element degeneration at high temperature.

Description

Scaled bulb tubular hydraulic generator Damper Winding broken bar fault on-Line Monitor Device

Technical field

The utility model is related to Generator Rotor Temperature monitoring technical field, specially a kind of bulb through-flow type hydro-turbo power generation Machine Damper Winding broken bar fault on-Line Monitor Device.

Background technology

As a kind of utilization low water head, the excellent unit of big flow waterpower resourses, scaled bulb tubular hydraulic generator Tremendous development and extensive use have been obtained in China.But a kind of Damper Winding occurs in succession at the same time, many such units disconnected Novel fault causes totally unfavorable influence to the safe and stable operation of unit and power grid.And special significant It is that such novel fault has following peculiar property：One is the amortisseur bar of fracture is respectively positioned on rotor magnetic pole leeward area nearby Domain, and be generally broken in the middle part of amortisseur bar, the second is the amortisseur bar of fracture has apparent over hot melting trace, the third is fracture resistance The iron core of Buddhist nun near zone（Pole shoe iron core i.e. near amortisseur bar）Surface also shows apparent overheat or even the trace that turns blue Mark.To find such failure symptom in time, unit and safe operation of electric network are ensured conscientiously, it is necessary to it is directed to such failure, it is real Sign monitoring is applied to work with early warning.

However so far, amortisseur bar and power generator rotor magnetic pole constant temperature are monitored on-line, is still suffered from following Crucial problem：First, amortisseur bar is located inside pole core, it is larger to be mounted directly temperature element difficulty；Second is that allowing to hindering Temperature element is mounted directly on Buddhist nun's item, the continued power of related temperature measuring equipment is difficult to ensure, is continued so that being difficult to reliably realize Line monitors；Third, in air gap between generator stator-rotator, there is compared with high-intensity magnetic field, causes conventional temperature sampling or measure letter Number, it is difficult to completely reliably stator is transferred to from rotor；Fourth, if amortisseur bar or neighbouring iron core temperature are excessively high, phase is frequently resulted in It closes temperature sensing device and other signals to fail using device degradation, fifth, current rotor component（Containing amortisseur bar）Temperature is direct Measurement expense is relatively high.

Traditional Generator Rotor Temperature monitoring device, the resistance mostly based on coil windings calculate（That is electric-resistivity method）, pass through Other mathematical models, which are converted indirectly, obtains the temperature value of generator amature, and this device only has theoretical calculation to prove, lacks Actual laboratory facilities are proved, and test result is mostly mean temperature, it is difficult to reasonably and comprehensively reflect the true of temperature of rotor Distribution, it is more difficult to temperature be implemented to the multiple amortisseur bar of such failure and its neighbouring pole shoe iron core surface and accurately monitored on-line.And it is right For such novel light bulb tubular generator amortisseur bar overheating breaking failure, the amortisseur bar of overheat before being broken, Itself acutely generates heat, its neighbouring pole shoe iron core surface overheat will be caused even to turn blue, and therefore, how to be directed to the multiple damping of failure Item and its neighbouring pole shoe iron core surface（Pole core surface region near i.e. each magnetic pole leeward near zone amortisseur bar）Temperature Degree, accurately easily realizes on-line temperature monitoring, where the key technology for becoming such malfunction monitoring and early warning.

Utility model content

In view of the above-mentioned problems, contactless temperature measurement on-line mode is used the purpose of this utility model is to provide a kind of, it can The device aging problem caused by electric machine iron core surface temperature is excessively high is avoided, and with compared with strong anti-interference ability, more high accuracy Scaled bulb tubular hydraulic generator Damper Winding broken bar fault on-Line Monitor Device, technical solution is as follows：

A kind of scaled bulb tubular hydraulic generator Damper Winding broken bar fault on-Line Monitor Device, including it is set to generator Laser ranging locating module and infrared temperature probe module of the stator air duct close to air gap side；Laser ranging locating module The position of tracking and positioning amortisseur bar iron core surface temperature monitoring nearby region, and sent out position data by data communication module Give industrial personal computer；Infrared temperature probe module acquires working rotor temperature, is sent position data by data communication module To industrial personal computer.

Further, the infrared temperature probe module includes optical signalling probe portion, signal shaping and enlarging section Point, signal acquisition and conversion portion；Optical signalling probe portion receives incident infrared light beam, and is converted into telecommunications Number；Signal shaping and amplifier section carry out processing and amplitude amplification to electric signal；Signal acquisition is with conversion portion to analog signal It is acquired in real time, and is converted to digital signal.

Further, the data communication module is 485 data communication modules, the RS485 communication cable peripheral hardwares of use There is shielding copper mesh.

Further, magnetic screen shell, the reserved infrared transmitting of magnetic screen shell are equipped with outside the monitoring device Corresponding orientation of the hole towards the generator amature that need to be detected.

The utility model has the beneficial effects that：The utility model avoids being in direct contact for detector and determinand, relatively Measuring signal transmission is by magnetic between being mounted directly the existing way of temperature sensing device in amortisseur bar, therefore avoid rotor The risk of field interference, has stronger anti-interference；Relevant information detection, conversion and equipment for after-treatment are incorporated into non-turn of stator etc. Dynamic part, therefore can preferably implement continued power, and then preferably realize that consistently online monitors；Infrared temperature probe mould Block is mounted on the inside of generator unit stator air duct（Close to air gap）, it is not only able to preferably realize and the non-contact of temperature of rotor is adopted Sample measures, and possesses excellent ventilation and heat condition, preferably avoids the failure of element degeneration at high temperature；Compared to mounted on rotor portions Divide the conventional temperature-measurement technology for being mounted directly temperature element, thermometric component is installed in stator, wiring difficulty is greatly lowered, related work Skill cost is also relatively low, and can preferably solve fixation problem, avoids the risk that de- temperature element is got rid of in rotor rotation.

Description of the drawings

Fig. 1 is amortisseur bar overheating breaking position and neighbouring pole shoe iron core surface superheat region schematic diagram.

Fig. 2 is amortisseur bar iron core surface monitoring area schematic nearby.

Fig. 3 is infrared measurement of temperature component installation location schematic diagram.

Fig. 4 is sensor assembly scheme of installation.

Fig. 5 temperature monitoring system structure principle charts.

In figure：1- rotor magnetic poles；11- pole cores surface superheat region；The leeward region amortisseur bar cleavage of 12- magnetic poles It sets；Nearby iron core surface temperature monitors region to 13- amortisseur bars；2- amortisseur bars；3- laser ranging locating modules；4- infrared measurement of temperature passes Sensor module；5- generator amatures；6- stator air ducts.

Specific implementation mode

The utility model is described in further details in the following with reference to the drawings and specific embodiments.What the utility model used Detection device includes being set to laser ranging locating module 3 and infrared measurement of temperature of the generator unit stator air duct close to air gap side to pass Sensor module 4；Laser ranging locating module 3 tracks and the position in positioning amortisseur bar 2 iron core surface temperature monitoring nearby region, and Position data is sent to industrial personal computer by data communication module；Infrared temperature probe module 4 acquires working rotor temperature, leads to It crosses data communication module and position data is sent to industrial personal computer.

Due to there is more apparent height between the magnetic pole pole shoe top platform and rotor other parts of installation amortisseur bar Difference（Had differences with stator core inner surface distance）, using Laser Distance Measuring Equipment, analyzed in conjunction with rotating speed, it can be effective Current rotor turned position is differentiated, and then temperature monitors region（I.e. each magnetic pole leeward near zone amortisseur bar is attached Nearly pole core surface region, as depicted in figs. 1 and 2）The period below infrared measurement of temperature equipment is turned to, and in the time Section implements temperature monitoring to this region.Laser ranging locating module 3 and infrared temperature probe module 4 are fixed mounted on generator On the inside of sub- air duct（Close to air gap）, as shown in Figure 3 and Figure 4.

As shown in figure 5, optics and photodetecting part in infrared temperature probe module 4, can receive the infrared of incidence Line beam, and it is converted into corresponding electric signal；Signal amplifies and process part, and the small signal that can be exported to photodetector is real Existing amplitude amplification, and Noise Background is filtered, improve the signal noise ratio level of signal；Data acquire and conversion portion, to analog signal It is acquired in real time, and is converted to digital signal for teletransmission.

Using contactless temperature-measuring mode, the thermometric mode of contact is compared, generator iron-core surface temperature mistake is avoided The phenomenon that causing temperature transducer and other electrical signal sampler accelerated ageings when high.It is passed using digitlization differential signal Defeated mode improves the reliability and anti-interference ability of signal teletransmission.

Infrared measurement of temperature equipment is mounted on magnetic screen enclosure, and magnetic screen shell is reserved with infrared transmitting hole and cable mistake Hole receives infrared-ray and the installation of temperature measuring equipment cable convenient for detector.It during the installation process, will be with the red of magnetic screen shell Outer temperature measuring equipment is mounted on the inside of generator unit stator air duct（Close to air gap）So that the generator that beam orifice is detected towards needs The particular orientation of rotor, due to temperature rise, emits the infrared ray of specific wavelength when generator amature is started to work.These After infrared ray is incident on the optics and photodetecting part of temperature measuring equipment, electric signal output can be converted into, wherein different wave length The pulse height of infrared ray, the electric signal of generation is different；At the amplification and filtering by signal amplification with processing unit Reason, to improve signal amplitude, enhances the signal noise ratio level of signal；The acquisition of signal is whole by pulse signal integration with processing unit Shape forms the infrared spectrum of particular form, is then converted into 485 digital signals, by teletransmission mode, realizes specific node The host computer of infrared spectrum uploads.

Temperature measuring equipment is protected using magnetic screen shell, can effectively reduce danger of the generator high-intensity magnetic field to electronics equipment Evil degree, extends the service life of temperature measuring equipment, improves equipment job stability；It is carried out using the cable with shielding copper mesh The transmission of 485 signals can further decrease external disturbance, improve signal noise ratio level.

Test device is specific as follows：

A. laser ranging locating module and infrared temperature probe are installed close to air gap side in generator unit stator air duct Module；

B. it by laser ranging locating module, is analyzed in conjunction with rotating speed, differentiates current rotor turned position, and then determine temperature Degree monitoring region turns to the period below infrared temperature probe module；

C. in the period, continuous temperature monitoring is carried out to the region by infrared temperature probe module, then will acquisition To infrared spectrum be converted to digital signal and be sent to industrial personal computer；

D. according to infrared spectral characteristic founding mathematical models, the infrared spectrum letter in region is monitored in conjunction with the specific temperature of acquisition Number, the temperature information of rotor is obtained in real time.

According to power generator rotor magnetic pole tested region（Pole core near i.e. each magnetic pole leeward near zone amortisseur bar Surface）Infrared spectral characteristic founding mathematical models, in conjunction with the infrared spectroscopy signals of the specific measuring point of acquisition, you can obtain in real time Take the temperature information of rotor.

The mounting means of infrared temperature probe module is in the present embodiment：Along generator shaft to from upstream side under Side is swum, several air ducts is selected to be installed, with the temperature of multiple measuring points on one, the region axis of monitoring temperature monitoring simultaneously. And when the temperature monitoring area rotation on each magnetic pole pole shoe surface is by below infrared temperature sampling element, pass through the time at it In section, implement temperature sampling several times.It more can comprehensively grasp temperature monitoring region from two dimensions of room and time in this way Profiling temperatures.Installation site possesses excellent ventilation and heat condition simultaneously, preferably avoids the mistake of element degeneration at high temperature Effect.

The temperature measuring equipment individual node of the present embodiment can be carried out measurement data result far with RS485 differential signal modes It passes, and can realize the electrical cascade of the signal transmission of multipoint temperature monitoring on same rotor.

The temperature measuring equipment of the present embodiment, can scaled bulb tubular hydraulic generator Damper Winding broken strip described in needle the present embodiment therefore Barrier, the angle monitored from pole shoe iron core surface temperature near the multiple amortisseur bar of failure are realized On-line Fault monitoring and early warning, are compared In the contact temperature-measuring device for being mounted directly temperature element in amortisseur bar or pole shoe iron core surface, this paper devices effectively overcome it Temperature element installation is not easy, continued power is difficult, is difficult to long-term consistently online monitoring, interference of electromagnetic field signal transmission, thermometric member Part high temperature ageing, measured zone position and monitor the notable defects such as difficult, measurement cost is high, have superior technique advance With engineering adaptability.

Claims (4)

1. a kind of scaled bulb tubular hydraulic generator Damper Winding broken bar fault on-Line Monitor Device, which is characterized in that including setting It is placed in laser ranging locating module of the generator unit stator air duct close to air gap side（3）With infrared temperature probe module（4）； Laser ranging locating module（3）Tracking and positioning amortisseur bar（2）The position in neighbouring iron core surface temperature monitoring region, and pass through number Position data is sent to industrial personal computer according to communication module；Infrared temperature probe module（4）Working rotor temperature is acquired, number is passed through Position data is sent to industrial personal computer according to communication module.

2. scaled bulb tubular hydraulic generator Damper Winding broken bar fault on-Line Monitor Device according to claim 1, It is characterized in that, the infrared temperature probe module includes that optical signalling probe portion, signal shaping and amplifier section, signal are adopted Collection and conversion portion；Optical signalling probe portion receives incident infrared light beam, and is converted into electric signal；Signal shaping And amplifier section carries out processing to electric signal and amplitude is amplified；Signal acquisition adopts analog signal with conversion portion in real time Collection, and it is converted to digital signal.

3. scaled bulb tubular hydraulic generator Damper Winding broken bar fault on-Line Monitor Device according to claim 1, It is characterized in that, the data communication module is 485 data communication modules, and the RS485 communication cables of use are externally provided with shielding copper mesh.

4. scaled bulb tubular hydraulic generator Damper Winding broken bar fault on-Line Monitor Device according to claim 1, It is characterized in that, magnetic screen shell is equipped with outside the monitoring device, and the reserved infrared transmitting hole direction of magnetic screen shell needs to visit The corresponding orientation of the generator amature of survey.