CN111308203A - Power transformer operating voltage phase acquisition method and sensing device - Google Patents
Power transformer operating voltage phase acquisition method and sensing device Download PDFInfo
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- CN111308203A CN111308203A CN202010270439.1A CN202010270439A CN111308203A CN 111308203 A CN111308203 A CN 111308203A CN 202010270439 A CN202010270439 A CN 202010270439A CN 111308203 A CN111308203 A CN 111308203A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
- G01R25/005—Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller, or for passing one of the input signals as output signal
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention relates to a method for acquiring the operating voltage phase of a power transformer and a sensing device. The phase acquisition and verification unit is used for debugging the equipment accuracy before the detection is started; the invention can obtain the voltage phase signal of a certain phase in the A phase, the B phase and the C phase of the power network where the transformer is positioned by sensing the weak magnetic leakage signal of the corresponding phase of the lead wire or the box wall of the power transmission transformer, and transmits the phase information in a wireless mode, thereby solving the problem that the phase is difficult to take in the production field.
Description
Technical Field
The invention belongs to the technical field of a method for acquiring a reference phase for live detection of electrical equipment, and particularly relates to a method for acquiring an operating voltage phase of a power transformer and a sensing device.
Background
In recent years, with the development of power grids, the condition maintenance replaces the traditional regular maintenance and becomes the main mode of equipment maintenance. The potential safety hazard in the operation of the electric equipment can be timely found by the live detection of the electric equipment, and the method is an important means for evaluating the operation state of the electric equipment. The electrified detection of various electrical equipment needs to be analyzed and judged by combining the operating voltage phase information, for example, the high-frequency partial discharge electrified detection of a transformer needs to analyze the discharge type and discharge positioning by means of accurate operating voltage phase information, and the resistance current electrified detection of a lightning arrester needs to calculate the resistance current by means of the phase of the current phase, so that the method is particularly important for conveniently, accurately, reliably and stably measuring the operating voltage phase signal of the electrical equipment.
At present, in field application, the method for measuring and acquiring the phase information of the operating voltage mainly comprises the following steps: (1) the PT secondary side wiring obtains operation voltage information, and the voltage signal is obtained from the voltage transformer secondary voltage of the equipment to be tested with the same interval, and the method has high technical requirement, needs special secondary personnel operation, and brings great risk to the power grid because the signal is directly received from the return circuit terminal of the operation equipment. (2) The method measures current signals on the PT grounding wire through the high-frequency current sensor to obtain operating voltage signals, can measure operating voltage phases conveniently and accurately, but is limited in that not all grounding wires lead to the position where detection can be implemented, and the method also has certain limitation in application. (3) The method is simple in wiring and convenient for field application, but the phase relation between the synchronous signal and the three-phase power supply cannot be accurately expressed after the voltage synchronous signal is obtained by the method, so that great difficulty is brought to later analysis of equipment electrification detection. (4) The method is characterized in that a station maintenance power supply is used for acquiring voltage information, a synchronous phase sensor is directly connected to the station maintenance power supply to measure phase information of the station power supply, phase deviation relation analysis of a station transformer winding connection group and a main transformer connection group is needed, the voltage phase information is realized through a manual correction means, phase angle adjustment errors are often caused due to the difference of technical levels of testers, and later analysis and judgment are seriously influenced. In summary, the existing methods for acquiring the operating voltage information of the equipment all have certain defects and certain limitations, and safety, accuracy and wide applicability cannot be achieved.
Disclosure of Invention
The invention aims to provide a method for acquiring the operating voltage phase of a power transformer and a sensing device, which can accurately and conveniently acquire the operating voltage phase information of a system accurate to a certain phase through the operating transformer.
The technical scheme adopted by the invention is as follows:
an electrical transformer operating voltage phase acquisition sensing device, comprising:
the phase detection sensor is used for acquiring leakage magnetic signals corresponding to different phases of the transformer, shaping and amplifying the leakage magnetic signals, identifying phase angles to acquire voltage phase information at a power supply, and transmitting the phase information to the phase signal receiver;
the phase signal receiver is used for receiving phase information sent by the phase detection sensor and outputting a pulse level signal, wherein the level signal is a 0-degree mark value of the phase of the measured voltage; and
and the phase acquisition and verification unit is used for debugging the equipment accuracy before the detection is started.
Further, the phase detection sensor includes:
the magnetic leakage induction sensor is used for measuring a magnetic leakage signal of a conductive part in the operation of the transformer and converting the magnetic leakage signal into a voltage signal to be output;
the signal conditioning unit is used for receiving the voltage signal of the magnetic leakage induction sensor and processing the voltage signal into a voltage signal capable of being identified and utilized;
the phase angle identification module is used for receiving the voltage signal processed by the signal conditioning unit, extracting zero crossing point information and realizing the extraction of phase information of the voltage signal containing power supply information; and
and the wireless transmitting module is used for transmitting the phase information extracted by the phase angle identification module to the phase signal receiver.
Furthermore, the processing of the voltage signal by the signal conditioning unit comprises an impedance transformation link, a signal amplification link and a noise filtering link.
Furthermore, the phase detection sensor further comprises a pulse coding module, which is used for carrying out binary coding on the phase information extracted by the phase angle identification module, and then sending the coded phase information to the phase signal receiver by using the wireless transmission module.
Further, the phase signal receiver includes:
the wireless receiving module is used for receiving the data information transmitted by the phase detection sensor and transmitting the data information to the signal identification module;
the signal identification module is used for acquiring a zero-crossing increasing phase value of data information transmitted by the signal identification module, marking the zero-crossing increasing phase value as a phase starting mark and transmitting the phase starting mark to the pulse signal generation module;
and the pulse signal generating module is used for generating a pulse level signal according to the phase starting position marked by the signal identification module and outputting the pulse level signal.
Further, a data decoding module is further arranged between the wireless receiving module and the signal identification module, and is used for decoding the data information received by the wireless receiving module and transmitting the decoded data information to the signal identification module.
Further, the phase acquisition verification unit includes:
the power supply waveform reducing module is used for reducing and outputting the same-type same-phase amplitude sinusoidal signals of the power supply voltage waveform through voltage;
and the calibration magnetic field generation module is used for generating a magnetic field signal corresponding to the power supply alternating voltage through the electromagnetic-magnetic conversion module.
A power transformer operating voltage phase acquisition sensing method comprises the following steps:
the phase detection sensor is used for calibrating the phase acquisition and calibration unit, and a detection phase signal is output through the phase signal receiver;
comparing the standard signal with the detection phase signal, starting to measure the operating voltage phase if no deviation exists, and adjusting the phase deviation degree of the output level signal through the phase signal receiver if deviation exists so as to measure the voltage phase after the output level signal is consistent with the standard signal;
attaching a phase detection sensor to a detection phase shell of the transformer to obtain a magnetic leakage signal and sending the acquired information in a wireless mode;
the phase signal receiver receives the transmitted information, and outputs a phase 0-degree marking pulse to finish the acquisition of the operating voltage phase information.
Further, the phase detection sensor phase information measurement comprises the following steps:
measuring a magnetic flux leakage signal of a conductive part of the transformer in operation by adopting a magnetic flux leakage induction sensor, and converting the magnetic flux leakage signal into a voltage signal for output;
the signal conditioning unit processes the voltage signal in an impedance transformation link, a signal amplification link and a noise filtering link, so that the voltage signal output by the magnetic flux leakage induction sensor is processed into a voltage signal which can be identified and utilized in a subsequent link;
the phase angle identification module extracts the zero crossing point information of the voltage signal processed by the signal conditioning unit to extract the phase of the voltage signal containing the power supply information;
the pulse coding link carries out binary coding processing on the extracted phase information;
and sending the coded data information to a receiving device of the partial discharge electrification detection signal of the transformer through a wireless transmitting module.
Further, the phase signal receiver phase information output comprises the steps of:
receiving data information transmitted by a phase detection sensor through a wireless receiving module, and transmitting a data packet to a data decoding module;
decoding a data packet containing system operation voltage phase information through a data decoding module, and transmitting the decoded data to a signal identification module;
the signal identification module acquires a signal zero-crossing increasing phase value, marks the signal zero-crossing increasing phase value as a phase starting mark and transmits the phase starting mark to the pulse signal generation module;
and according to the position of the starting mark, the pulse signal generating module generates a pulse level signal and outputs the pulse level signal.
The invention has the positive effects that:
(1) and convenience in field application. By inducing weak magnetic leakage signals corresponding to the lead wires or the box walls of the power transmission transformer, the invention can obtain voltage phase signals of a certain phase in the A phase, the B phase and the C phase of a power network where the transformer is positioned, and transmit phase information in a wireless mode, thereby solving the problem of difficult phase acquisition in a production field.
(2) Phase acquisition accuracy. The high accuracy of the output detection phase of the voltage phase acquisition sensing device can be ensured through the phase information checking device; meanwhile, the sensor can accurately acquire real-time phase information of the specific phase of the power grid by detecting the specific phase, modulating the signal and identifying and analyzing a phase angle.
(3) And (5) functional development practicability. Through accurate measurement and acquisition of phase information, accuracy of analysis of the electrified detection data of the equipment can be further improved, high-accuracy state evaluation of the operating equipment is realized, and the state overhaul working efficiency is improved.
Drawings
FIG. 1 is a schematic block diagram of a phase detection sensor according to the present invention;
FIG. 2 is a schematic diagram of a phase detection sensor according to the present invention;
FIG. 3 is a schematic view of a structure of a paste adhesive dot according to the present invention;
FIG. 4 is a schematic block diagram of a phase signal receiver according to the present invention;
FIG. 5 is a schematic diagram of a phase signal receiver according to the present invention;
FIG. 6 is a schematic side view of a phase signal receiver according to the present invention;
FIG. 7 is a schematic block diagram of a phase acquisition verification unit of the present invention;
fig. 8 is a schematic structural diagram of a phase acquisition verification unit according to the present invention.
Detailed Description
As shown in fig. 1 to 3, the operating voltage phase acquisition sensing device for a power transformer of the present invention includes: phase detection sensor, phase signal receiver and phase acquisition check unit. Based on the principle that an alternating electric field generates a magnetic field, the acquisition and verification unit is connected with a power supply to generate a calibration magnetic field signal and output a power supply phase signal at the same time. After the phase signal receiver is started, the phase signal receiver can be automatically and wirelessly connected with a phase detection sensor in a matching mode, detection signals are wirelessly received, a plug wire type terminal is adopted to output pulse level signals with certain amplitude, and the level signals are the 0-degree mark values of the measured voltage phases.
The phase detection sensor is used for acquiring leakage magnetic signals corresponding to different phases of the transformer, shaping and amplifying the leakage magnetic signals, identifying phase angles to acquire voltage phase information at a power supply, and transmitting the phase information to the phase signal receiver;
the phase signal receiver is used for receiving phase information sent by the phase detection sensor and outputting a pulse level signal, wherein the level signal is a 0-degree mark value of the phase of the measured voltage; and
and the phase acquisition and verification unit is used for debugging the equipment accuracy before the detection is started.
The invention is based on the correlation and intergenerative relation between the alternating electric field and the magnetic field, detects weak leakage magnetic signals through the phase detection sensor, obtains the operating voltage phase information, transmits data in a wireless transmission mode, and receives and outputs the measured system voltage phase signals through the phase signal receiver. The phase acquisition and calibration unit is adopted to calibrate and debug the phase detection sensor and the phase signal receiver, and the high accuracy of phase information detection in the actual detection process is ensured by correcting the error between the output voltage phase signal and the standard correction signal.
As shown in fig. 1-3, the phase detection sensor realizes an energy transfer principle based on the internal magnetoelectric induction of the transformer, and there is an association relationship between the distribution of the dynamic magnetic field and the operating electric field, and between the distribution of the dynamic magnetic field and the operating voltage vector during the operation of the power transformer. The method comprises the steps of utilizing a leakage magnetic field generated on the box wall by a lead and an inner coil of a transformer, obtaining weak leakage magnetic signals corresponding to the transformer according to the electromagnetic induction directional coupling principle, carrying out link processing such as shaping amplification, phase angle identification and pulse coding on the leakage magnetic signals according to the relevance relation of the magnetic field signals and the operating voltage signals, obtaining voltage phase information at a power supply, and transmitting the phase information to a phase signal receiver in a wireless mode.
The phase detection sensor includes:
the high-sensitivity directional magnetic leakage induction sensor 1 is used for measuring a weak magnetic leakage signal of a conductive part in the operation of the transformer, converting the weak magnetic leakage signal into a weaker voltage signal and outputting the weaker voltage signal; according to the electromagnetic induction principle, magnetic leakage signals in a specific direction outside the coupling transformer are in a circular structure in form, and weak magnetic leakage signals are detected in the largest area;
the signal conditioning unit 2 is used for primarily processing voltage signals, comprises an impedance transformation link, a signal amplification link and a noise filtering link, and is used for processing weaker voltage signals into voltage signals which can be identified and utilized by a subsequent link;
the phase angle identification module 3 is used for receiving the voltage signal processed by the signal conditioning unit 2, extracting zero crossing point information and realizing the extraction of phase information of the voltage signal containing power supply information;
the pulse coding module 4 is used for carrying out binary coding on the phase information extracted by the phase angle identification module 3 and then sending the coded phase information to the phase signal receiver by using the wireless transmitting module 5;
the wireless transmitting module 5 is used for transmitting the phase information extracted by the phase angle identification module 3 to the phase signal receiver; meanwhile, a first detachable signal antenna 6 can be arranged to enhance the signal transmission efficiency and the transmission distance, and a rechargeable battery 9 supplies power for the sensor application.
Magnetic leakage inductive transducer 1, signal conditioning unit 2, phase angle identification module 3, pulse code module 4 and wireless transmission module 5 all arrange in have handle 7 electromagnetic protection shell on, the shell adopts compound stainless steel, possesses stronger anti-electromagnetic interference ability, reliable waterproof, dustproof and anti falling performance. When in use, the adhesive dots 8 can be replaced and pasted on the wall of the power transformer box.
As shown in fig. 4-6, the phase signal receiver receives encoded data containing phase information, and outputs a pulse level signal with a certain amplitude through links such as data decoding, phase angle identification, and pulse generation, where the level signal is a 0 ° mark value of the measured voltage phase. It includes:
the wireless receiving module 10 is matched with the second detachable signal antenna 17, reliably receives data information wirelessly transmitted by the phase detection sensor without packet loss, and transmits a data packet to the data decoding module 11;
the data decoding module 11 is used for decoding a data packet containing system operating voltage phase information, ensuring lossless fidelity of a decoding process and transmitting decoded data to the signal identification module 12;
the signal identification module 12 is configured to obtain a zero-crossing increased phase value of the data information transmitted by the signal identification module 12, mark the zero-crossing increased phase value as a phase start mark, and transmit the phase start mark to the pulse signal generation module 13;
and the pulse signal generating module 13 is used for generating a pulse level signal according to the phase starting position marked by the signal identifying module 12 and outputting the pulse level signal through the output interface 15.
The phase signal receiver further comprises a phase angle deviation adjusting module 14, which can perform phase angle correction on the output level information by manually adjusting the rotary button 20, and the correction degree number is shown in the display window 16 for indication.
The phase detection sensor comprises a second rechargeable battery and a charging port 18, and the power supply of the battery is controlled to be switched on and off through a switch 19
The phase signal receiver also has an electromagnetic interference resistant housing, can achieve the performance of shielding external electromagnetic interference, and has reliable waterproof, dustproof and anti-falling performance. The wireless receiving module 10, the data decoding module 11, the signal identifying module 12 and the pulse signal generating module 13 are all arranged in the electromagnetic interference resistant shell.
When the phase detection device is used, the phase acquisition and calibration unit is powered on, the phase detection sensor is used for calibrating the acquisition and calibration unit, a detection phase signal is output through the phase signal receiver, a standard signal and a detection signal are compared, operation voltage phase measurement can be started if no deviation exists, the phase deviation degree of an output level signal is adjusted through the phase signal receiver if deviation exists, and voltage phase measurement can be carried out after the phase deviation degree is consistent with the standard signal.
As shown in fig. 7 and 8, the phase acquisition and verification unit is used for debugging the accuracy of the equipment before detection starts, and the unit can generate an alternating electric field when the power is switched on and provide accurate voltage phase information; the phase detection sensor is used for detecting a magnetic field generated by the acquisition and calibration unit, the phase signal receiver outputs a voltage phase signal and an accurate phase signal provided by the acquisition and calibration unit are compared, and the phase signal receiver is applied to artificially correct the deviation if necessary so as to ensure the accuracy of the detection data. It includes: a power waveform reducing module 22 for outputting the same-type same-phase amplitude sinusoidal signal of the power voltage waveform through voltage reduction; and a calibration magnetic field generating module 23, configured to generate a magnetic field signal corresponding to the power supply alternating voltage through an electromagnetic-to-magnetic conversion module.
The detailed content of the working principle is as follows:
1. the AC power supply is accessed through the power input interface 21;
2. the power waveform reducing module 22 reduces the waveform of the input power voltage, outputs a small-amplitude sinusoidal signal with the same type and phase as a standard phase for detecting signal comparison;
3. the calibration magnetic field generating module 23 generates a calibration magnetic field signal for the phase detection sensor and the phase signal receiver to detect and generate a detection signal;
4. by comparing the detection signal with the standard phase and adopting phase angle shift adjustment of the phase signal receiver, the output signal of the device accurately accords with the standard phase, and debugging before detection of the device is completed.
A power transformer operating voltage phase acquisition sensing method comprises the following steps:
the phase detection sensor is used for calibrating the phase acquisition and calibration unit, and a detection phase signal is output through the phase signal receiver;
comparing the standard signal with the detection phase signal, starting to measure the operating voltage phase if no deviation exists, and adjusting the phase deviation degree of the output level signal through the phase signal receiver if deviation exists so as to measure the voltage phase after the output level signal is consistent with the standard signal;
attaching a phase detection sensor to a proper position of a phase detection shell of the transformer to obtain a magnetic leakage signal, and sending acquired information in a wireless mode;
the phase signal receiver receives the transmitted information, and outputs a phase 0-degree marking pulse to finish the acquisition of the operating voltage phase information.
The phase detection sensor phase information measurement comprises the following steps:
a leakage magnetic induction sensor 1 is adopted to measure a leakage weak magnetic signal of a conductive part in the operation of the transformer, and the leakage weak magnetic signal is converted into a weaker voltage signal to be output;
the signal conditioning unit 2 performs primary processing on the voltage signal, including an impedance transformation link, a signal amplification link and a noise filtering link, so as to process the weaker voltage signal output by the magnetic flux leakage induction sensor 1 into a voltage signal which can be identified and utilized by a subsequent link;
the phase angle identification module 3 extracts the zero crossing point information of the voltage signal processed by the signal conditioning unit 2 to extract the phase of the voltage signal containing the power supply information;
the pulse coding link carries out binary coding processing on the extracted phase information;
and sending the coded data information to a receiving device of the partial discharge electrification detection signal of the transformer through a wireless transmitting module 5.
The phase signal receiver phase information output comprises the steps of:
the wireless receiving module 10 receives data information transmitted by the phase detection sensor and transmits a data packet to the data decoding module 11;
decoding the data packet containing the system operating voltage phase information through a data decoding module 11, and transmitting the decoded data to a signal identification module 12;
the signal identification module 12 acquires a signal zero-crossing increasing phase value, marks the signal zero-crossing increasing phase value as a phase starting mark, and transmits the signal zero-crossing increasing phase value to the pulse signal generation module 13;
the pulse signal generating module 13 generates and outputs a pulse level signal according to the start mark position.
The invention provides a new idea for acquiring the operating voltage phase information of the power system, realizes accurate and convenient acquisition of the operating voltage phase information of the system, provides an accurate reference phase for the live detection work of power transmission equipment in the system, and improves the accuracy of equipment state evaluation. The phase detection sensor is attached to the position where the phase detection transformer shell to be detected is located at the proper position, the phase detection sensor sends information for detection and collection in a wireless mode, the directional arrangement requirement is contained during use, and the phase detection sensor is applied to electrified detection and has reliable safety and practical convenience.
Claims (10)
1. An operating voltage phase acquisition sensing device for a power transformer, comprising:
the phase detection sensor is used for acquiring leakage magnetic signals corresponding to different phases of the transformer, shaping and amplifying the leakage magnetic signals, identifying phase angles to acquire voltage phase information at a power supply, and transmitting the phase information to the phase signal receiver;
the phase signal receiver is used for receiving phase information sent by the phase detection sensor and outputting a pulse level signal, wherein the level signal is a 0-degree mark value of the phase of the measured voltage; and
and the phase acquisition and verification unit is used for debugging the equipment accuracy before the detection is started.
2. An operating voltage phase acquisition sensing device for a power transformer as claimed in claim 1, wherein said phase detection sensor comprises:
the magnetic leakage induction sensor is used for measuring a magnetic leakage signal of a conductive part in the operation of the transformer and converting the magnetic leakage signal into a voltage signal to be output;
the signal conditioning unit is used for receiving the voltage signal of the magnetic leakage induction sensor and processing the voltage signal into a voltage signal capable of being identified and utilized;
the phase angle identification module is used for receiving the voltage signal processed by the signal conditioning unit, extracting zero crossing point information and realizing the extraction of phase information of the voltage signal containing power supply information; and
and the wireless transmitting module is used for transmitting the phase information extracted by the phase angle identification module to the phase signal receiver.
3. The power transformer operating voltage phase acquisition sensing device of claim 2, wherein the signal conditioning unit processes the voltage signal by an impedance transformation link, a signal amplification link and a noise filtering link.
4. The power transformer operating voltage phase acquisition sensing device of claim 2, wherein the phase detection sensor further comprises a pulse coding module for binary coding the phase information extracted by the phase angle identification module, and then sending the coded phase information to the phase signal receiver by using the wireless transmission module.
5. An operating voltage phase acquisition sensing device for a power transformer as claimed in claim 4, wherein said phase signal receiver comprises:
the wireless receiving module is used for receiving the data information transmitted by the phase detection sensor and transmitting the data information to the signal identification module;
the signal identification module is used for acquiring a zero-crossing increasing phase value of data information transmitted by the signal identification module, marking the zero-crossing increasing phase value as a phase starting mark and transmitting the phase starting mark to the pulse signal generation module;
and the pulse signal generating module is used for generating a pulse level signal according to the phase starting position marked by the signal identification module and outputting the pulse level signal.
6. The power transformer operating voltage phase acquisition sensing device according to claim 5, wherein a data decoding module is further disposed between the wireless receiving module and the signal identification module, and is configured to decode the data information received by the wireless receiving module and transmit the decoded data information to the signal identification module.
7. The power transformer operating voltage phase acquisition sensing device according to claim 1, wherein the phase acquisition verification unit comprises:
the power supply waveform reducing module is used for reducing and outputting the same-type same-phase amplitude sinusoidal signals of the power supply voltage waveform through voltage;
and the calibration magnetic field generation module is used for generating a magnetic field signal corresponding to the power supply alternating voltage through the electromagnetic-magnetic conversion module.
8. A power transformer operating voltage phase acquisition sensing method is characterized by comprising the following steps:
the phase detection sensor is used for calibrating the phase acquisition and calibration unit, and a detection phase signal is output through the phase signal receiver;
comparing the standard signal with the detection phase signal, starting to measure the operating voltage phase if no deviation exists, and adjusting the phase deviation degree of the output level signal through the phase signal receiver if deviation exists so as to measure the voltage phase after the output level signal is consistent with the standard signal;
attaching a phase detection sensor to a detection phase shell of the transformer to obtain a magnetic leakage signal and sending the acquired information in a wireless mode;
the phase signal receiver receives the transmitted information, and outputs a phase 0-degree marking pulse to finish the acquisition of the operating voltage phase information.
9. The method for sensing the phase of the operating voltage of the power transformer as claimed in claim 8, wherein the phase detection sensor phase information comprises the following steps:
measuring a magnetic flux leakage signal of a conductive part of the transformer in operation by adopting a magnetic flux leakage induction sensor, and converting the magnetic flux leakage signal into a voltage signal for output;
the signal conditioning unit processes the voltage signal in an impedance transformation link, a signal amplification link and a noise filtering link, so that the voltage signal output by the magnetic flux leakage induction sensor is processed into a voltage signal which can be identified and utilized in a subsequent link;
the phase angle identification module extracts the zero crossing point information of the voltage signal processed by the signal conditioning unit to extract the phase of the voltage signal containing the power supply information;
the pulse coding link carries out binary coding processing on the extracted phase information;
and sending the coded data information to a receiving device of the partial discharge electrification detection signal of the transformer through a wireless transmitting module.
10. A power transformer operating voltage phase acquisition sensing method as claimed in claim 8, wherein said phase signal receiver phase information output comprises the steps of:
receiving data information transmitted by a phase detection sensor through a wireless receiving module, and transmitting a data packet to a data decoding module;
decoding a data packet containing system operation voltage phase information through a data decoding module, and transmitting the decoded data to a signal identification module;
the signal identification module acquires a signal zero-crossing increasing phase value, marks the signal zero-crossing increasing phase value as a phase starting mark and transmits the phase starting mark to the pulse signal generation module;
and according to the position of the starting mark, the pulse signal generating module generates a pulse level signal and outputs the pulse level signal.
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Application publication date: 20200619 |
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