CN212301778U - On-load tap-changer fault on-line diagnosis device - Google Patents
On-load tap-changer fault on-line diagnosis device Download PDFInfo
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- CN212301778U CN212301778U CN202021182849.2U CN202021182849U CN212301778U CN 212301778 U CN212301778 U CN 212301778U CN 202021182849 U CN202021182849 U CN 202021182849U CN 212301778 U CN212301778 U CN 212301778U
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Abstract
The utility model discloses an on-load tap-changer fault on-line diagnosis device, the device includes: the device comprises a data acquisition unit, a signal processing unit, a waveform acquisition unit and a waveform comparison unit; the data acquisition unit comprises a sound wave collector and a pulse collector, the sound wave collector is connected with the transformer control loop, and the pulse collector is connected with the transformer power loop; the utility model discloses can acquire the wave form in real time, accurately acquire the transformer on-load tap-changer operation health status through the wave form contrast on line, improve work efficiency and practicality greatly.
Description
Technical Field
The utility model relates to an on-load tap-changer fault diagnosis technical field, more specifically the saying so relates to an on-load tap-changer fault on-line diagnosis device.
Background
In recent years, China is continuously developed in energy construction, the scale of a power network is larger and larger, the development of power network layout is promoted by the requirements of ultrahigh voltage and long-distance power transmission and large unit construction, and a power system is gradually developed into a power network for cross-regional power supply such as a high-voltage backbone network connection area network and a power networking. With the continuous improvement of the voltage grade and the power grid capacity, the safe operation and the healthy operation performance of equipment of the power system are further improved, which is necessary requirement in the process of energy construction and intelligent power grid development. In the power equipment, the on-load tap changer plays important roles in adjusting reactive power flow, stabilizing load center voltage and reducing transmission loss, and the operation stability of the on-load tap changer is an important factor for ensuring the reliability and the economical efficiency of the whole power system.
With the heavier and heavier power grid regulation task, the workload of the on-load transformer operation and maintenance is heavier and heavier. Because the electrical structure of the equipment is complicated, the operation environment is severe, and the quality of the equipment provided by different manufacturers is different, the on-load tap changer in the transformer inevitably has aging problems along with the increase of the operation age, and can cause power failure faults in serious conditions, thereby bringing hidden troubles to the operation stability of a power grid.
However, for the operation and maintenance technology of the on-load tap-changer, an off-line periodic maintenance or mechanical characteristic test mode is still mainly adopted at present, and a systematic live-line measurement scheme is very rare and immature in practical application.
Therefore, how to provide an on-load tap-changer fault online diagnosis device is a problem that needs to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an on-load tap-changer fault on-line diagnosis device can effectively carry out online detection through sound wave signal and pulse signal to the abnormity of control circuit and drive circuit to diagnose the trouble, improved fault diagnosis's work efficiency.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an on-load tap-changer fault on-line diagnosis device comprises: the device comprises a data acquisition unit, a signal processing unit, a waveform acquisition unit and a waveform comparison unit;
the data acquisition unit comprises a sound wave collector and a pulse collector, the sound wave collector is arranged on the wall of the transformer box where the on-load tap-changer is located, the sound wave collector is connected with the transformer control loop, and the pulse collector is connected with the transformer power loop;
the sound wave collector and the pulse collector are connected with the signal processing unit, and the signal processing unit, the waveform acquisition unit and the waveform comparison unit are sequentially connected;
the sound wave collector is used for collecting sound wave signals of the transformer control loop in real time;
the pulse collector is used for collecting pulse signals of the power loop of the transformer in real time;
the signal processing unit is used for processing the collected sound wave signals and the collected pulse signals;
the waveform acquisition unit is used for acquiring the waveform of the processed signal;
and the waveform comparison unit is used for comparing the acquired waveform with a standard waveform to obtain an abnormal point.
Preferably, each phase transformer is connected with a sound wave collector, and each sound wave collector is connected with the signal processing unit.
Preferably, the signal processing unit comprises an analog-to-digital converter, a signal amplifier, a noise suppressor and a signal detector;
the sound wave collector and the pulse collector are connected with the analog-to-digital converter, the signal amplifier, the noise suppressor and the signal detector are sequentially connected, and the signal detector is connected with the waveform acquisition unit;
the analog-to-digital converter is used for converting the collected sound wave signals and the collected pulse signals into digital signals;
the signal amplifier is used for amplifying the converted digital signal;
the noise suppressor is used for filtering the amplified signal and filtering signal noise;
and the signal detector is used for demodulating the filtered signal.
According to the technical scheme, compare with prior art, the utility model discloses an on-load tap-changer fault on-line diagnosis device, sound wave collector and the pulse collector of transformer power return circuit through transformer control loop, gather sound wave signal and pulse signal in real time, after carrying out the processing analysis with the signal of gathering, obtain abnormal point according to the contrast of wave form and standard waveform, can effectively diagnose the trouble according to the condition of abnormal point, the device can accurately acquire transformer on-load tap-changer operation healthy state on line, to on-load tap-changer electrical property, mechanical properties carries out comprehensive diagnosis, satisfy the real-time detection diagnosis to on-load tap-changer, accord with the requirement of smart power grids to advanced state measurement and diagnostic technique, work efficiency and practicality have been improved greatly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an on-load tap-changer fault online diagnosis device provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model discloses on-load tap-changer fault on-line diagnosis device, include: the device comprises a data acquisition unit, a signal processing unit, a waveform acquisition unit and a waveform comparison unit;
the data acquisition unit comprises an acoustic wave collector and a pulse collector, the acoustic wave collector is arranged on the wall of the transformer box where the on-load tap-changer is located, the acoustic wave collector is connected with the transformer control loop, and the pulse collector is connected with the transformer power loop;
the sound wave collector and the pulse collector are connected with the signal processing unit, and the signal processing unit, the waveform acquisition unit and the waveform comparison unit are sequentially connected;
the sound wave collector is used for collecting sound wave signals of the transformer control loop in real time;
the pulse collector is used for collecting pulse signals of the power loop of the transformer in real time;
the signal processing unit is used for processing the collected sound wave signals and the collected pulse signals;
a waveform acquisition unit for acquiring a waveform of the processed signal;
and the waveform comparison unit is used for comparing the acquired waveform with the standard waveform to obtain an abnormal point.
It should be noted that:
the waveforms include a variety of, for example, time-resistance or time-current waveforms.
In order to further realize the technical scheme, each phase transformer is connected with a sound wave collector, and each sound wave collector is connected with the signal processing unit.
In order to further realize the technical scheme, the signal processing unit comprises an analog-to-digital converter, a signal amplifier, a noise suppressor and a signal detector;
the sound wave collector and the pulse collector are connected with the analog converter, the analog-to-digital converter, the signal amplifier, the noise suppressor and the signal detector are sequentially connected, and the signal detector is connected with the waveform acquisition unit;
the analog-to-digital converter is used for converting the collected sound wave signals and the collected pulse signals into digital signals;
the signal amplifier is used for amplifying the converted digital signal;
the noise suppressor is used for filtering the amplified signal and filtering signal noise;
and the signal detector is used for demodulating the filtered signal.
The utility model discloses a working process does: the sound wave collector collects sound wave signals of a transformer control loop in real time, the pulse collector collects pulse signals of a transformer power loop in real time, and the collected sound wave signals and the collected pulse signals are transmitted to the signal processing unit;
the signal processing unit processes the collected sound wave signals and pulse signals and transmits the sound wave signals and the pulse signals to the waveform acquisition unit; the analog-to-digital converter converts the collected sound wave signals and pulse signals into digital signals, transmits the digital signals to the signal amplifier for signal amplification, further filters the amplified signals through the noise suppressor, filters signal noise, and demodulates the filtered signals through the signal detector.
The waveform acquisition unit is used for acquiring the waveform of the processed signal and transmitting the extracted characteristics to the waveform comparison unit;
the waveform comparison unit performs fault diagnosis according to the extracted signal characteristics.
The working principle of the device is as follows:
when the on-load tap-changer operates, in the operating mechanism, the contact separation between the moving contact and the static contact generates pulse impact force to generate a vibration signal. The vibration signal is transmitted via the stationary contacts or the transformer oil to the transformer tank, which contains a large amount of status information about the on-load tap changer occurring in operation. Consequently the mechanical vibration signal's on analysis transformer tank surface wave form and standard waveform's difference can judge the operation conditions who has on-load tap-changer, the utility model discloses in adopt and use sound wave sensor to carry out signal acquisition.
In addition, the power source of the control loop of the on-load tap-changer is a driving motor, and is a control and transmission device for the conversion operation of the on-load tap-changer. In the switching process, if the performance of the energy storage spring is changed, the current of the driving motor is changed along with the change of the driving torque of the driving motor, so that the current pulse in the driving loop is collected, and whether the on-load tap-changer breaks down or not can be judged effectively according to whether the abnormal change occurs or not.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. An on-load tap-changer fault on-line diagnosis device is characterized by comprising: the device comprises a data acquisition unit, a signal processing unit, a waveform acquisition unit and a waveform comparison unit;
the data acquisition unit comprises a sound wave collector and a pulse collector, the sound wave collector is arranged on the wall of the transformer box where the on-load tap-changer is located, the sound wave collector is connected with the transformer control loop, and the pulse collector is connected with the transformer power loop;
the sound wave collector and the pulse collector are connected with the signal processing unit, and the signal processing unit, the waveform acquisition unit and the waveform comparison unit are sequentially connected;
the sound wave collector is used for collecting sound wave signals of the transformer control loop in real time;
the pulse collector is used for collecting pulse signals of the power loop of the transformer in real time;
the signal processing unit is used for processing the collected sound wave signals and the collected pulse signals;
the waveform acquiring unit is used for acquiring the waveform of the processed signal;
and the waveform comparison unit is used for comparing the acquired waveform with a standard waveform to obtain an abnormal point.
2. The on-load tap-changer fault on-line diagnosis device according to claim 1, characterized in that each phase transformer is connected with a sound wave collector, and each sound wave collector is connected with the signal processing unit.
3. The on-load tap changer fault on-line diagnosis device of claim 1, wherein the signal processing unit comprises an analog-to-digital converter, a signal amplifier, a noise suppressor and a signal detector;
the sound wave collector and the pulse collector are connected with the analog-to-digital converter, the signal amplifier, the noise suppressor and the signal detector are sequentially connected, and the signal detector is connected with the waveform acquisition unit;
the analog-to-digital converter is used for converting the collected sound wave signals and the collected pulse signals into digital signals;
the signal amplifier is used for amplifying the converted digital signal;
the noise suppressor is used for filtering the amplified signal and filtering signal noise;
and the signal detector is used for demodulating the filtered signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021182849.2U CN212301778U (en) | 2020-06-23 | 2020-06-23 | On-load tap-changer fault on-line diagnosis device |
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| CN202021182849.2U CN212301778U (en) | 2020-06-23 | 2020-06-23 | On-load tap-changer fault on-line diagnosis device |
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