CN111337782A - Main transformer bias live monitoring system - Google Patents
Main transformer bias live monitoring system Download PDFInfo
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- CN111337782A CN111337782A CN202010257819.1A CN202010257819A CN111337782A CN 111337782 A CN111337782 A CN 111337782A CN 202010257819 A CN202010257819 A CN 202010257819A CN 111337782 A CN111337782 A CN 111337782A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
Abstract
The invention relates to a main transformer bias live monitoring system which comprises a current sampling terminal, a voltage sampling and processing terminal, a data processing platform and an alarm terminal. The current sampling terminal is used for sampling the current waveform of the down lead of the main transformer and outputting a current sampling signal; the voltage sampling and processing terminal is used for sampling the reference voltage waveform of the main transformer and outputting a voltage sampling signal, and is also used for calculating to obtain the harmonic components of the voltage and the current of the main transformer, analyzing whether the main transformer has a magnetic bias defect and outputting an analysis result signal; the data processing platform is used for receiving a current sampling signal, a voltage sampling signal and an analysis result signal of the main transformer in real time and sending an alarm signal; and the method is also used for comparing historical data and prejudging the bias fault development condition of the main transformer. And the alarm terminal is used for receiving the alarm signal and giving an alarm. The invention can comprehensively monitor and analyze the bias of the main transformer, thereby accurately reflecting the operation condition of the main transformer and ensuring the long-term reliable operation of the main transformer.
Description
Technical Field
The invention belongs to the technical field of power equipment monitoring, and particularly relates to a system for carrying out live monitoring on bias of a main transformer.
Background
The direct current magnetic biasing phenomenon is a phenomenon that a direct current component appears in a winding of a transformer, so that a magnetic flux curve of the transformer deviates in one direction, an exciting current is subjected to non-periodic distortion, a working point of the transformer deviates, and the transformer is in an abnormal working state. At this moment, the iron core rapidly enters a saturated state, the normal work of a main transformer is seriously influenced, many adverse consequences can be generated, such as the obvious increase of the amplitude of the exciting current, the aggravation of vibration, the increase of the magnetic leakage of the transformer, the increase of loss and temperature rise and the like, the service life of the main transformer can be shortened, and the normal operation of the main transformer is seriously damaged. The existing direct current magnetic biasing monitoring system is insufficient in the beauty and cannot comprehensively and completely analyze the direct current magnetic biasing degree and the direct current magnetic biasing fault of the main transformer.
Disclosure of Invention
The invention aims to provide a main transformer bias live monitoring system capable of comprehensively monitoring and analyzing main transformer direct current bias.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a main electrified monitoring system of magnetic bias that becomes for monitor the direct current magnetic bias state that becomes the owner, the main electrified monitoring system of magnetic bias that becomes includes:
the current sampling terminal is used for sampling the current waveform of the down conductor of the main transformer in real time and outputting a current sampling signal synchronized by a time base signal;
the voltage sampling and processing terminal is used for sampling the reference voltage waveform of the main transformer in real time and outputting a voltage sampling signal synchronized by a time base signal, and the voltage sampling and processing terminal is also used for receiving and outputting the current sampling signal, calculating in real time based on the current sampling signal and the voltage sampling signal to obtain the harmonic component of the voltage and the current of the main transformer, analyzing whether the main transformer has the magnetic biasing defect in real time according to the harmonic component of the voltage and the current of the main transformer and outputting an analysis result signal;
the data processing platform is communicated with the voltage sampling and processing terminal and is used for receiving a current sampling signal, a voltage sampling signal and an analysis result signal of the main transformer in real time and sending an alarm signal when the analysis result signal shows that the main transformer has defects;
and the alarm terminal is carried by operation and maintenance personnel and is used for receiving the alarm signal and giving an alarm.
The data processing platform is used for storing historical data of the current sampling signals and the voltage sampling signals of the main transformer, storing the current sampling signals, the voltage sampling signals and the analysis result signals of the main transformer, and comparing the current sampling signals, the voltage sampling signals and the analysis result signals with corresponding historical data, so that the bias fault development condition of the main transformer is pre-judged.
The main transformer bias live monitoring system further comprises a Rogowski coil which is connected in series with a grounding down lead of the main transformer, and the Rogowski coil is connected with the current sampling terminal.
The main transformer bias live monitoring system further comprises a voltage transformer arranged on an input bus of the main transformer, and the voltage transformer is connected with the voltage sampling and processing terminal.
The current adopting terminal and the voltage sampling and processing terminal are respectively connected with a GPS time base module for providing the time base signal.
The alarm terminal is a mobile phone.
And the voltage sampling and processing terminal calculates and obtains the harmonic components of the voltage and the current of the main transformer by using a local edge calculation method.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention can comprehensively monitor and analyze the bias of the main transformer, thereby accurately reflecting the operation condition of the main transformer and ensuring the long-term reliable operation of the main transformer.
Drawings
FIG. 1 is a schematic diagram of a main transformer bias electrification monitoring system of the invention.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings to which the invention is attached.
The first embodiment is as follows: as shown in fig. 1, a main transformer bias electrification monitoring system comprises a current sampling terminal, a voltage sampling and processing terminal, a data processing platform and a plurality of alarm terminals. The voltage sampling and processing terminal is respectively in communication connection with the current sampling terminal and the data processing platform, and the alarm terminal is in communication connection with the data processing platform.
The current sampling terminal is used for sampling the current waveform of the down conductor of the main transformer in real time and outputting a current sampling signal synchronized by the time base signal. The main transformer bias live monitoring system further comprises a Rogowski coil connected in series with a grounding down-lead of the main transformer, and the Rogowski coil is connected with the current sampling terminal.
And the voltage sampling and processing terminal is used for sampling the reference voltage waveform of the main transformer in real time and outputting a voltage sampling signal synchronized by the time base signal. The main transformer bias live monitoring system further comprises a voltage transformer arranged on an input bus of the main transformer, and the voltage transformer is connected with the voltage sampling and processing terminal. The voltage sampling and processing terminal is also used for receiving and outputting current sampling signals, obtaining harmonic components of voltage and current of the main transformer by real-time calculation through a local edge calculation method based on the current sampling signals and the voltage sampling signals, analyzing whether the main transformer has magnetic bias defects in real time according to the harmonic components of the voltage and the current of the main transformer, automatically judging the size of the magnetic bias defects and outputting analysis result signals.
The current adopting terminal and the voltage sampling and processing terminal are respectively connected with a GPS time base module for providing time base signals.
The data processing platform is used for receiving a current sampling signal, a voltage sampling signal and an analysis result signal of the main transformer in real time, knowing the running condition of the main transformer in real time and sending an alarm signal when the analysis result signal shows that the main transformer has defects (harmonic data exceeds an alarm value or data is abnormal and the like). The data processing platform is used for storing historical data of current sampling signals and voltage sampling signals of the main transformer, and the data processing platform is further used for storing the current sampling signals, the voltage sampling signals and analysis result signals of the main transformer and comparing the current sampling signals, the voltage sampling signals and the analysis result signals with the corresponding historical data, so that the bias fault development condition of the main transformer is pre-judged, and the pre-judged bias fault development condition of the main transformer can be sent as early warning information.
The alarm terminal is carried by operation and maintenance personnel and can be a mobile phone. And the alarm terminal is used for receiving the alarm signal and giving an alarm. After alarming, the secondary confirmation is considered to determine whether power failure treatment is needed or not. The alarm terminal can also receive early warning information.
The method takes big data as a core, calculates data based on a local edge, compares historical data, and compares the sampled synchronous time-base current, voltage waveform and historical data with the phase of a voltage reference, so that various data in the operation of the main transformer are analyzed, the operation condition of the main transformer can be accurately reflected, and the long-term safe and reliable operation of the main transformer is ensured.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (7)
1. The utility model provides a main electrified monitoring system of magnetic biasing for the direct current magnetic biasing state that monitors the owner and become, its characterized in that: the electrified monitoring system of main transformer bias magnet includes:
the current sampling terminal is used for sampling the current waveform of the down conductor of the main transformer in real time and outputting a current sampling signal synchronized by a time base signal;
the voltage sampling and processing terminal is used for sampling the reference voltage waveform of the main transformer in real time and outputting a voltage sampling signal synchronized by a time base signal, and the voltage sampling and processing terminal is also used for receiving and outputting the current sampling signal, calculating in real time based on the current sampling signal and the voltage sampling signal to obtain the harmonic component of the voltage and the current of the main transformer, analyzing whether the main transformer has the magnetic biasing defect in real time according to the harmonic component of the voltage and the current of the main transformer and outputting an analysis result signal;
the data processing platform is communicated with the voltage sampling and processing terminal and is used for receiving a current sampling signal, a voltage sampling signal and an analysis result signal of the main transformer in real time and sending an alarm signal when the analysis result signal shows that the main transformer has defects;
and the alarm terminal is carried by operation and maintenance personnel and is used for receiving the alarm signal and giving an alarm.
2. The main transformer bias electrification monitoring system of claim 1, wherein: the data processing platform is used for storing historical data of the current sampling signals and the voltage sampling signals of the main transformer, storing the current sampling signals, the voltage sampling signals and the analysis result signals of the main transformer, and comparing the current sampling signals, the voltage sampling signals and the analysis result signals with corresponding historical data, so that the bias fault development condition of the main transformer is pre-judged.
3. The main transformer bias electrification monitoring system of claim 1, wherein: the main transformer bias live monitoring system further comprises a Rogowski coil which is connected in series with a grounding down lead of the main transformer, and the Rogowski coil is connected with the current sampling terminal.
4. The main transformer bias electrification monitoring system of claim 1, wherein: the main transformer bias live monitoring system further comprises a voltage transformer arranged on an input bus of the main transformer, and the voltage transformer is connected with the voltage sampling and processing terminal.
5. The main transformer bias electrification monitoring system of claim 1, wherein: the current adopting terminal and the voltage sampling and processing terminal are respectively connected with a GPS time base module for providing the time base signal.
6. The main transformer bias electrification monitoring system of claim 1, wherein: the alarm terminal is a mobile phone.
7. The main transformer bias electrification monitoring system of claim 1, wherein: and the voltage sampling and processing terminal calculates and obtains the harmonic components of the voltage and the current of the main transformer by using a local edge calculation method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010257819.1A CN111337782A (en) | 2020-04-03 | 2020-04-03 | Main transformer bias live monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010257819.1A CN111337782A (en) | 2020-04-03 | 2020-04-03 | Main transformer bias live monitoring system |
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| CN111337782A true CN111337782A (en) | 2020-06-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113709213A (en) * | 2021-08-03 | 2021-11-26 | 国网湖北省电力有限公司电力科学研究院 | DC magnetic bias live detection data synchronization method related to rail transit |
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Application publication date: 20200626 |
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