CN116840744A - Transformer winding deformation on-line detection sensing device - Google Patents
Transformer winding deformation on-line detection sensing device Download PDFInfo
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- CN116840744A CN116840744A CN202311117090.8A CN202311117090A CN116840744A CN 116840744 A CN116840744 A CN 116840744A CN 202311117090 A CN202311117090 A CN 202311117090A CN 116840744 A CN116840744 A CN 116840744A
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- 238000004804 winding Methods 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims description 147
- 238000001914 filtration Methods 0.000 claims description 18
- 230000000087 stabilizing effect Effects 0.000 claims description 18
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000003381 stabilizer Substances 0.000 claims description 6
- 239000011324 bead Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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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
- G01R31/62—Testing of transformers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/24—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in magnetic properties
-
- 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
- G01R31/72—Testing of electric windings
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Abstract
The invention discloses an online detection sensing device for transformer winding deformation, which belongs to the technical field of electric power, and comprises an energy acquisition unit and a signal acquisition unit, so that the technical problem that the transformer winding deformation can be detected online is solved.
Description
Technical Field
The invention belongs to the technical field of electric power, and relates to a transformer winding deformation on-line detection sensing device.
Background
Transformers are the core equipment of the whole grid system and once a fault occurs, the losses incurred will not be measurable. As the power grid develops, the number and magnitude of short circuit impacts experienced by the power transformer also increases. The internal supporting parts of the transformer are aged year by year, and the short-circuit impact resistance is reduced year by year. The transformer winding may be deformed due to short-circuit current or lightning current impact in the near zone, collision during transportation or installation, explosion or earthquake of combustible gas decomposed from transformer oil, etc.
The development of the related technology of transformer winding deformation monitoring comprises a short circuit impedance method, a low-voltage pulse method, a frequency response method, a vibration method and the like. The short-circuit impedance method and the frequency response method are widely applied and have related technical specifications and detection standards. The common winding deformation detection method based on the frequency response method principle needs to stop the operation of the transformer and disassemble connecting wires, and is time-consuming and labor-consuming, and severely limited in flexibility and timeliness.
Disclosure of Invention
The invention aims to provide an on-line detection sensing device for transformer winding deformation, which solves the technical problem of on-line detection of transformer winding deformation.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the transformer winding deformation on-line detection sensing device comprises an energy taking unit and a signal acquisition unit, wherein the energy taking unit supplies power for the signal acquisition unit;
the energy taking unit comprises a sensor coil, a rectifying and filtering circuit, a DC-DC module and an LDO voltage stabilizing circuit, wherein the sensor coil is connected with the rectifying and filtering circuit, the rectifying and filtering circuit is connected with the DC-DC module, the DC-DC module is connected with the LDO voltage stabilizing circuit, the DC-DC module outputs VCC positive power supply, and the LDO voltage stabilizing circuit outputs 3.3V power supply;
the signal acquisition unit comprises a protection circuit, a power frequency filter, a voltage follower, a high-pass filter, an intermediate amplifier, a secondary amplifier, a main controller and a wireless module, wherein the input end of the power frequency filter is connected with a sensor coil, the power frequency filter is also connected with the voltage follower, the voltage follower is connected with the high-pass filter, the high-pass filter is connected with the intermediate amplifier, the intermediate amplifier is connected with the secondary amplifier, the secondary amplifier is connected with an AD port of the main controller, and the wireless module is connected with the main controller;
the protection circuit is arranged at the input end of the power frequency filter and used for lightning protection.
Preferably, the sensor coil is a coil T1, and the coil T1 is a high-frequency measurement coil.
Preferably, the rectifying and filtering circuit includes an inductor L1, a capacitor C1, a diode D2, a diode D1, a capacitor C13, a resistor R1, a resistor R2, a capacitor C14, an inductor L2, a resistor R3, a resistor R4, a capacitor C3, a capacitor C4 and a capacitor C5, wherein a secondary side 3 pin of the coil T1 is connected with an anode of the diode D2 through the inductor L1 and the capacitor C1 which are connected in series, a cathode of the diode D1 is connected with an anode of the diode D2, a cathode of the diode D1 is connected with a 4 pin of the secondary side of the coil T1, namely, a first ground wire, a cathode of the diode D2 is connected with a1 pin of the inductor L2, a2 pin of the inductor L2 outputs v+ power, one end of the capacitor C13 is connected with a cathode of the diode D2, and the other end is connected with the first ground wire;
the 1 pin of the resistor R1 is connected with the 1 pin of the inductor L2, the 2 pin of the resistor R2 is connected with the first ground wire through the resistor R2, the 1 pin of the capacitor C2 is connected with the 1 pin of the inductor L2, the 2 pin of the capacitor C14 is connected with the first ground wire, and the 2 pin of the resistor R1 is connected with the 2 pin of the capacitor C2;
the 1 pin of the resistor R3 is connected with the 2 pin of the inductor L2, the 2 pin of the resistor R3 is connected with the first ground wire through the resistor R4, the 1 pin of the capacitor C3 is connected with the 2 pin of the inductor L2, the 2 pin of the capacitor C4 is connected with the first ground wire, and the 2 pin of the resistor R3 is connected with the 2 pin of the capacitor C3;
one end of the capacitor C5 is connected with the 2 pin of the inductor L2, and the other end of the capacitor C is connected with the first ground wire.
Preferably, the DC-DC module includes a DC-DC chip IC1 and a peripheral circuit thereof, the model of the DC-DC chip IC1 is MAX5097, the input end of the DC-DC chip IC1 is powered by a v+ power supply, and the output end outputs a VCC power supply and a second ground wire;
the LDO voltage stabilizing circuit comprises an LDO voltage stabilizer and a peripheral circuit thereof, wherein the model of the LDO voltage stabilizer is AMS1117-3.3, the input end of the LDO voltage stabilizing circuit is powered by a VCC power supply, and the output end of the LDO voltage stabilizing circuit outputs a 3.3V power supply;
the VCC power supply is used for supplying power to the protection circuit, the power frequency filter, the voltage follower, the high-pass filter, the intermediate amplifier and the secondary amplifier, and the 3.3V power supply is used for supplying power to the main controller and the wireless module;
the first ground wire and the second ground wire are connected through a magnetic bead R0.
Preferably, the power frequency filter includes a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a resistor R6, a resistor R7, a resistor R8 and a resistor R9, wherein the 1 pin of the capacitor C9 is connected with the 3 pin and the 2 pin of the coil T1 through the resistor R6, the 2 pin of the capacitor C9 is also connected with the 1 pin of the capacitor C10, the 2 pin of the capacitor C10 is connected with the first ground wire through the resistor R7, the 2 pin of the capacitor C10 is also connected with the 1 pin of the capacitor C11, the 2 pin of the capacitor C11 is connected with the first ground wire through the resistor R8, the 2 pin of the capacitor C11 is also connected with the 1 pin of the capacitor C12, and the 2 pin of the capacitor C12 is connected with the first ground wire through the resistor R9;
the protection circuit comprises a TVS tube D4, wherein one end of the TVS tube D4 is connected with the 3 pin of the coil T1, and the other end of the TVS tube D4 is connected with the 4 pin of the coil T1.
Preferably, the voltage follower is a voltage follower circuit composed of an amplifier A1, a resistor R11 and a resistor R10, wherein the positive input end of the amplifier A1 is connected with the 2 pin of a capacitor C12 through the resistor R10;
the high-pass filter comprises a capacitor C15, a capacitor C16, a capacitor C21, a resistor R12, a resistor R13, a capacitor R14 and an amplifier A2, wherein the 1 pin of the capacitor C15 is connected with the output end of the amplifier A1, the 2 pin of the capacitor C15 is connected with the 1 pin of the capacitor C16, the 2 pin of the capacitor C15 is also connected with a first ground wire through the resistor R12, the 2 pin of the capacitor C16 is connected with the output end of the amplifier A2 through the resistor R13, the 2 pin of the capacitor C16 is also connected with the 1 pin of the capacitor C21, the 2 pin of the capacitor C21 is connected with the positive input end of the amplifier A2, and the 2 pin of the capacitor C21 is also connected with the first ground wire through the resistor R14;
the intermediate amplifier comprises a resistor C23, an amplifier A3, a resistor R16, a resistor R17 and a capacitor C24, wherein the output end of the amplifier A2 is connected with the positive input end of the amplifier A3 through the capacitor C23, the positive input end of the amplifier A3 is also connected with a first ground wire through the resistor R16 and the resistor R17 which are connected in series, the connection node of the resistor R16 and the resistor R17 is connected with the output end of the amplifier A3 through the capacitor C24, and the negative input end and the output end of the amplifier A3 are connected together.
Preferably, the model of the secondary amplifier is a programmable amplifier AD8253, the input end of the secondary amplifier is connected with the output end of the amplifier A3, and the output end of the secondary amplifier is connected with an AD interface of the main controller.
Preferably, the TVS tube D4 is 20KP30CA, the main controller is C8051F350, and the wireless module is a Zigbee module CC2530.
The on-line detection sensing device for transformer winding deformation solves the technical problem that the transformer winding deformation can be detected on line, directly obtains power supply electric energy from the detection coil, designs signal conditioning circuits such as power frequency filtering, high-pass filtering, an intermediate amplifier, a voltage follower and the like, can realize automatic gain amplification of micro-current signals under strong background noise, has lightning-resistant design, can send on-line detection data to a data center through a wireless communication network, and realizes on-site on-line detection function for transformer winding deformation.
Drawings
FIG. 1 is a schematic block diagram of the present invention;
FIG. 2 is a circuit diagram of an energy harvesting unit, a protection circuit, a power frequency filter, a voltage follower, a high pass filter, an intermediate amplifier, and a secondary amplifier of the present invention;
fig. 3 is a CC2530 minimum system circuit diagram of the present invention.
Detailed Description
As shown in fig. 1-3, an online detection sensing device for transformer winding deformation comprises an energy taking unit and a signal acquisition unit, wherein the energy taking unit supplies power for the signal acquisition unit;
the energy taking unit comprises a sensor coil, a rectifying and filtering circuit, a DC-DC module and an LDO voltage stabilizing circuit, wherein the sensor coil is connected with the rectifying and filtering circuit, the rectifying and filtering circuit is connected with the DC-DC module, the DC-DC module is connected with the LDO voltage stabilizing circuit, the DC-DC module outputs VCC positive power supply, and the LDO voltage stabilizing circuit outputs 3.3V power supply;
the sensor coil is a coil T1, and the coil T1 is a high-frequency measuring coil.
The frequency response analysis method is proposed by Dick E P and Erven C in Canada, and is studied and widely applied by scholars in various countries.
The frequency response analysis method can be realized by a high-frequency measuring coil, and the principle is the same as that of a rogowski coil.
The embodiment is based on the high-frequency measuring coil for energy taking and measuring, the deformation of the transformer winding is detected by adopting a frequency response method, and the frequency range of the high-frequency signal is 1kHz-1MHz. The high-frequency measuring coil can be placed at the root of a 110kV or 220kV transformer sleeve, the number of turns of the secondary winding is 250, and the high-frequency measuring coil is of an open-loop circular ring structure. And an air gap structure of 1mm is designed at the open loop.
The coil iron core material is iron-based amorphous alloy, the initial permeability is 10000, and the magnetic induction saturation intensityCoil size outer diameter d=440 mm, inner diameter +.>Height h=25 mm, magnetic path length +.>。
The rectifying and filtering circuit comprises an inductor L1, a capacitor C1, a diode D2, a diode D1, a capacitor C13, a resistor R1, a resistor R2, a capacitor C14, an inductor L2, a resistor R3, a resistor R4, a capacitor C3, a capacitor C4 and a capacitor C5, wherein a secondary side 3 pin of the coil T1 is connected with an anode of the diode D2 through the inductor L1 and the capacitor C1 which are connected in series, a cathode of the diode D1 is connected with an anode of the diode D2, a cathode of the diode D1 is connected with a 4 pin of the secondary side of the coil T1, namely a first ground wire, a cathode of the diode D2 is connected with a1 pin of the inductor L2, a2 pin of the inductor L2 outputs a V+ power supply, one end of the capacitor C13 is connected with a cathode of the diode D2, and the other end of the capacitor C13 is connected with the first ground wire;
the 1 pin of the resistor R1 is connected with the 1 pin of the inductor L2, the 2 pin of the resistor R2 is connected with the first ground wire through the resistor R2, the 1 pin of the capacitor C2 is connected with the 1 pin of the inductor L2, the 2 pin of the capacitor C14 is connected with the first ground wire, and the 2 pin of the resistor R1 is connected with the 2 pin of the capacitor C2;
the 1 pin of the resistor R3 is connected with the 2 pin of the inductor L2, the 2 pin of the resistor R3 is connected with the first ground wire through the resistor R4, the 1 pin of the capacitor C3 is connected with the 2 pin of the inductor L2, the 2 pin of the capacitor C4 is connected with the first ground wire, and the 2 pin of the resistor R3 is connected with the 2 pin of the capacitor C3;
one end of the capacitor C5 is connected with the 2 pin of the inductor L2, and the other end of the capacitor C is connected with the first ground wire.
In this embodiment, the diode D1 and the second stage D2 form a voltage doubler rectifier circuit, and the resistor R1, the resistor R2, the capacitor C14, the inductor L2, the resistor R3, the resistor R4, the capacitor C3, and the capacitor C4 form an LC pi-type filter circuit, so that the output voltage of the integral energy-taking circuit has the characteristics of high smoothness and small fluctuation, and in order to reduce the interference of high-frequency voltage, the invention further connects two capacitors C13 and C5 in parallel at two ends of the circuit.
The DC-DC module comprises a DC-DC chip IC1 and peripheral circuits thereof, the model of the DC-DC chip IC1 is MAX5097, the input end of the DC-DC chip IC1 is powered by a V+ power supply, and the output end of the DC-DC chip IC1 outputs a VCC power supply and a second ground wire;
the LDO voltage stabilizing circuit comprises an LDO voltage stabilizer and a peripheral circuit thereof, wherein the model of the LDO voltage stabilizer is AMS1117-3.3, the input end of the LDO voltage stabilizing circuit is powered by a VCC power supply, and the output end of the LDO voltage stabilizing circuit outputs a 3.3V power supply;
the VCC power supply is used for supplying power to the protection circuit, the power frequency filter, the voltage follower, the high-pass filter, the intermediate amplifier and the secondary amplifier, and the 3.3V power supply is used for supplying power to the main controller and the wireless module;
the first ground wire and the second ground wire are connected through a magnetic bead R0.
Because the coil is required to take energy and perform online detection of winding deformation, a power frequency filter for separating high frequency from power frequency needs to be designed so as to reduce the influence of power frequency induced voltage on a measurement signal.
The signal acquisition unit comprises a protection circuit, a power frequency filter, a voltage follower, a high-pass filter, an intermediate amplifier, a secondary amplifier, a main controller and a wireless module, wherein the input end of the power frequency filter is connected with a sensor coil, the power frequency filter is also connected with the voltage follower, the voltage follower is connected with the high-pass filter, the high-pass filter is connected with the intermediate amplifier, the intermediate amplifier is connected with the secondary amplifier, the secondary amplifier is connected with an AD port of the main controller, and the wireless module is connected with the main controller;
the protection circuit is arranged at the input end of the power frequency filter and used for lightning protection.
The power frequency filter comprises a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a resistor R6, a resistor R7, a resistor R8 and a resistor R9, wherein the 1 pin of the capacitor C9 is connected with the 3 pin and the 2 pin of the coil T1, the 2 pin of the capacitor C9 is also connected with the 1 pin of the capacitor C10, the 2 pin of the capacitor C10 is connected with the first ground wire through the resistor R7, the 2 pin of the capacitor C10 is also connected with the 1 pin of the capacitor C11, the 2 pin of the capacitor C11 is connected with the first ground wire through the resistor R8, the 2 pin of the capacitor C11 is also connected with the 1 pin of the capacitor C12, and the 2 pin of the capacitor C12 is connected with the first ground wire through the resistor R9;
in the embodiment, the power frequency filter adopts a fourth-order RC circuit to filter power frequency, the attenuation multiple can reach 0.000954, the attenuation to the power frequency is large, and the power frequency interference can be well eliminated.
The protection circuit comprises a TVS tube D4, wherein one end of the TVS tube D4 is connected with the 3 pin of the coil T1, and the other end of the TVS tube D4 is connected with the 4 pin of the coil T1.
The voltage follower is a voltage follower circuit formed by an amplifier A1, a resistor R11 and a resistor R10, wherein the positive input end of the amplifier A1 is connected with the 2 pin of a capacitor C12 through the resistor R10;
the high-pass filter comprises a capacitor C15, a capacitor C16, a capacitor C21, a resistor R12, a resistor R13, a capacitor R14 and an amplifier A2, wherein the 1 pin of the capacitor C15 is connected with the output end of the amplifier A1, the 2 pin of the capacitor C15 is connected with the 1 pin of the capacitor C16, the 2 pin of the capacitor C15 is also connected with a first ground wire through the resistor R12, the 2 pin of the capacitor C16 is connected with the output end of the amplifier A2 through the resistor R13, the 2 pin of the capacitor C16 is also connected with the 1 pin of the capacitor C21, the 2 pin of the capacitor C21 is connected with the positive input end of the amplifier A2, and the 2 pin of the capacitor C21 is also connected with the first ground wire through the resistor R14;
the high-pass filter adopted by the invention is an active high-pass filter, has good filtering effect and can well reject low-frequency signals.
The intermediate amplifier comprises a resistor C23, an amplifier A3, a resistor R16, a resistor R17 and a capacitor C24, wherein the output end of the amplifier A2 is connected with the positive input end of the amplifier A3 through the capacitor C23, the positive input end of the amplifier A3 is also connected with a first ground wire through the resistor R16 and the resistor R17 which are connected in series, the connection node of the resistor R16 and the resistor R17 is connected with the output end of the amplifier A3 through the capacitor C24, and the negative input end and the output end of the amplifier A3 are connected together.
The invention adopts an intermediate amplifier to improve input impedance and reduce signal loss, and the intermediate amplifier is an alternating current amplifier.
In this embodiment, the amplifier A1, the amplifier A2, and the amplifier A3 are all OP07 amplifiers.
The model of the secondary amplifier is a programmable amplifier AD8253, the input end of the secondary amplifier is connected with the output end of the amplifier A3, and the output end of the secondary amplifier is connected with an AD interface of the main controller.
The model of the TVS tube D4 is 20KP30CA, the model of the main controller is C8051F350, and the model of the wireless module is a Zigbee module CC2530.
The signal of the coil T1 is filtered by the power frequency of the power frequency filter and then is sent to the voltage follower, then is sent to the high-pass filter for filtering, then is amplified once by the intermediate amplifier, is amplified twice by the secondary amplifier, and finally is sent to the AD of the main controller for processing. The main controller may transmit the detection data to the center through the wireless module.
The on-line detection sensing device for transformer winding deformation solves the technical problem that the transformer winding deformation can be detected on line, directly obtains power supply electric energy from the detection coil, designs signal conditioning circuits such as power frequency filtering, high-pass filtering, an intermediate amplifier, a voltage follower and the like, can realize automatic gain amplification of micro-current signals under strong background noise, has lightning-resistant design, can send on-line detection data to a data center through a wireless communication network, and realizes on-site on-line detection function for transformer winding deformation.
Claims (8)
1. The utility model provides a transformer winding deformation on-line measuring sensing device which characterized in that: the system comprises an energy taking unit and a signal acquisition unit, wherein the energy taking unit supplies power for the signal acquisition unit;
the energy taking unit comprises a sensor coil, a rectifying and filtering circuit, a DC-DC module and an LDO voltage stabilizing circuit, wherein the sensor coil is connected with the rectifying and filtering circuit, the rectifying and filtering circuit is connected with the DC-DC module, the DC-DC module is connected with the LDO voltage stabilizing circuit, the DC-DC module outputs VCC positive power supply, and the LDO voltage stabilizing circuit outputs 3.3V power supply;
the signal acquisition unit comprises a protection circuit, a power frequency filter, a voltage follower, a high-pass filter, an intermediate amplifier, a secondary amplifier, a main controller and a wireless module, wherein the input end of the power frequency filter is connected with a sensor coil, the power frequency filter is also connected with the voltage follower, the voltage follower is connected with the high-pass filter, the high-pass filter is connected with the intermediate amplifier, the intermediate amplifier is connected with the secondary amplifier, the secondary amplifier is connected with an AD port of the main controller, and the wireless module is connected with the main controller;
the protection circuit is arranged at the input end of the power frequency filter and used for lightning protection.
2. The transformer winding deformation on-line detection sensing device of claim 1, wherein: the sensor coil is a coil T1, and the coil T1 is a high-frequency measuring coil.
3. The transformer winding deformation on-line detection sensing device of claim 2, wherein: the rectifying and filtering circuit comprises an inductor L1, a capacitor C1, a diode D2, a diode D1, a capacitor C13, a resistor R1, a resistor R2, a capacitor C14, an inductor L2, a resistor R3, a resistor R4, a capacitor C3, a capacitor C4 and a capacitor C5, wherein a secondary side 3 pin of the coil T1 is connected with an anode of the diode D2 through the inductor L1 and the capacitor C1 which are connected in series, a cathode of the diode D1 is connected with an anode of the diode D2, a cathode of the diode D1 is connected with a 4 pin of the secondary side of the coil T1, namely a first ground wire, a cathode of the diode D2 is connected with a1 pin of the inductor L2, a2 pin of the inductor L2 outputs a V+ power supply, one end of the capacitor C13 is connected with a cathode of the diode D2, and the other end of the capacitor C13 is connected with the first ground wire;
the 1 pin of the resistor R1 is connected with the 1 pin of the inductor L2, the 2 pin of the resistor R2 is connected with the first ground wire through the resistor R2, the 1 pin of the capacitor C2 is connected with the 1 pin of the inductor L2, the 2 pin of the capacitor C14 is connected with the first ground wire, and the 2 pin of the resistor R1 is connected with the 2 pin of the capacitor C2;
the 1 pin of the resistor R3 is connected with the 2 pin of the inductor L2, the 2 pin of the resistor R3 is connected with the first ground wire through the resistor R4, the 1 pin of the capacitor C3 is connected with the 2 pin of the inductor L2, the 2 pin of the capacitor C4 is connected with the first ground wire, and the 2 pin of the resistor R3 is connected with the 2 pin of the capacitor C3;
one end of the capacitor C5 is connected with the 2 pin of the inductor L2, and the other end of the capacitor C is connected with the first ground wire.
4. A transformer winding deformation on-line detection sensing device as recited in claim 3, wherein: the DC-DC module comprises a DC-DC chip IC1 and peripheral circuits thereof, the model of the DC-DC chip IC1 is MAX5097, the input end of the DC-DC chip IC1 is powered by a V+ power supply, and the output end of the DC-DC chip IC1 outputs a VCC power supply and a second ground wire;
the LDO voltage stabilizing circuit comprises an LDO voltage stabilizer and a peripheral circuit thereof, wherein the model of the LDO voltage stabilizer is AMS1117-3.3, the input end of the LDO voltage stabilizing circuit is powered by a VCC power supply, and the output end of the LDO voltage stabilizing circuit outputs a 3.3V power supply;
the VCC power supply is used for supplying power to the protection circuit, the power frequency filter, the voltage follower, the high-pass filter, the intermediate amplifier and the secondary amplifier, and the 3.3V power supply is used for supplying power to the main controller and the wireless module;
the first ground wire and the second ground wire are connected through a magnetic bead R0.
5. The transformer winding deformation on-line detection sensing device according to claim 4, wherein: the power frequency filter comprises a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a resistor R6, a resistor R7, a resistor R8 and a resistor R9, wherein the 1 pin of the capacitor C9 is connected with the 3 pin and the 2 pin of the coil T1, the 2 pin of the capacitor C9 is also connected with the 1 pin of the capacitor C10, the 2 pin of the capacitor C10 is connected with the first ground wire through the resistor R7, the 2 pin of the capacitor C10 is also connected with the 1 pin of the capacitor C11, the 2 pin of the capacitor C11 is connected with the first ground wire through the resistor R8, the 2 pin of the capacitor C11 is also connected with the 1 pin of the capacitor C12, and the 2 pin of the capacitor C12 is connected with the first ground wire through the resistor R9;
the protection circuit comprises a TVS tube D4, wherein one end of the TVS tube D4 is connected with the 3 pin of the coil T1, and the other end of the TVS tube D4 is connected with the 4 pin of the coil T1.
6. The transformer winding deformation on-line detection sensing device according to claim 5, wherein: the voltage follower is a voltage follower circuit formed by an amplifier A1, a resistor R11 and a resistor R10, wherein the positive input end of the amplifier A1 is connected with the 2 pin of a capacitor C12 through the resistor R10;
the high-pass filter comprises a capacitor C15, a capacitor C16, a capacitor C21, a resistor R12, a resistor R13, a capacitor R14 and an amplifier A2, wherein the 1 pin of the capacitor C15 is connected with the output end of the amplifier A1, the 2 pin of the capacitor C15 is connected with the 1 pin of the capacitor C16, the 2 pin of the capacitor C15 is also connected with a first ground wire through the resistor R12, the 2 pin of the capacitor C16 is connected with the output end of the amplifier A2 through the resistor R13, the 2 pin of the capacitor C16 is also connected with the 1 pin of the capacitor C21, the 2 pin of the capacitor C21 is connected with the positive input end of the amplifier A2, and the 2 pin of the capacitor C21 is also connected with the first ground wire through the resistor R14;
the intermediate amplifier comprises a resistor C23, an amplifier A3, a resistor R16, a resistor R17 and a capacitor C24, wherein the output end of the amplifier A2 is connected with the positive input end of the amplifier A3 through the capacitor C23, the positive input end of the amplifier A3 is also connected with a first ground wire through the resistor R16 and the resistor R17 which are connected in series, the connection node of the resistor R16 and the resistor R17 is connected with the output end of the amplifier A3 through the capacitor C24, and the negative input end and the output end of the amplifier A3 are connected together.
7. The transformer winding deformation on-line detection sensing device of claim 6, wherein: the model of the secondary amplifier is a programmable amplifier AD8253, the input end of the secondary amplifier is connected with the output end of the amplifier A3, and the output end of the secondary amplifier is connected with an AD interface of the main controller.
8. The transformer winding deformation on-line detection sensing device according to claim 5, wherein: the model of the TVS tube D4 is 20KP30CA, the model of the main controller is C8051F350, and the model of the wireless module is a Zigbee module CC2530.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201724978U (en) * | 2010-05-18 | 2011-01-26 | 武汉大学 | Wireless automatic electricity getting current sensor |
| US20110221569A1 (en) * | 2010-03-12 | 2011-09-15 | Michael John Hamel | Remotely Powered and Remotely Interrogated Wireless Digital Sensor Telemetry System with a Plurality of Transponders Connected to a Single Receiver Coil or Antenna |
| CN204495860U (en) * | 2014-10-16 | 2015-07-22 | 华北电力大学 | A kind of transformer belt pyroelectric monitor instrument energy taking device |
| US9377341B1 (en) * | 2013-04-12 | 2016-06-28 | Joe David Watson | Electronic liquid level sensing device and gauge for liquid-immersed power transformers, reactors and similar equipment |
| CN205753995U (en) * | 2016-05-23 | 2016-11-30 | 北京立华莱康平台科技有限公司 | Power supply change-over device |
| CN206584008U (en) * | 2017-03-28 | 2017-10-24 | 海南电网有限责任公司 | Transformer hidden danger is discharged and winding deformation monitoring device |
-
2023
- 2023-09-01 CN CN202311117090.8A patent/CN116840744A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110221569A1 (en) * | 2010-03-12 | 2011-09-15 | Michael John Hamel | Remotely Powered and Remotely Interrogated Wireless Digital Sensor Telemetry System with a Plurality of Transponders Connected to a Single Receiver Coil or Antenna |
| CN201724978U (en) * | 2010-05-18 | 2011-01-26 | 武汉大学 | Wireless automatic electricity getting current sensor |
| US9377341B1 (en) * | 2013-04-12 | 2016-06-28 | Joe David Watson | Electronic liquid level sensing device and gauge for liquid-immersed power transformers, reactors and similar equipment |
| CN204495860U (en) * | 2014-10-16 | 2015-07-22 | 华北电力大学 | A kind of transformer belt pyroelectric monitor instrument energy taking device |
| CN205753995U (en) * | 2016-05-23 | 2016-11-30 | 北京立华莱康平台科技有限公司 | Power supply change-over device |
| CN206584008U (en) * | 2017-03-28 | 2017-10-24 | 海南电网有限责任公司 | Transformer hidden danger is discharged and winding deformation monitoring device |
Non-Patent Citations (2)
| Title |
|---|
| 刘飞: "变压器绝缘在线监测传感器自供能技术的研究", 中国优秀硕士论文辑, pages 3 - 5 * |
| 大连理工大学《分析化学实验》编写组: "分析化学实验", 大连理工大学出版社, pages: 58 * |
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