CN116184073B - Transformer fault on-line monitoring device with communication function - Google Patents
Transformer fault on-line monitoring device with communication function Download PDFInfo
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- CN116184073B CN116184073B CN202310022443.XA CN202310022443A CN116184073B CN 116184073 B CN116184073 B CN 116184073B CN 202310022443 A CN202310022443 A CN 202310022443A CN 116184073 B CN116184073 B CN 116184073B
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 18
- 238000004891 communication Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 44
- 238000012545 processing Methods 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 230000000630 rising effect Effects 0.000 claims abstract description 22
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 15
- 238000002955 isolation Methods 0.000 claims abstract description 11
- 239000003990 capacitor Substances 0.000 claims description 51
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 7
- 230000015556 catabolic process Effects 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Measurement Of Current Or Voltage (AREA)
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Abstract
The invention relates to the technical field of communication and fault detection, and provides a transformer fault on-line monitoring device with a communication function, which comprises a sensing circuit, a central processing module circuit and a voltage stabilizing output circuit which are sequentially connected, wherein the sensing circuit comprises a detection transmission circuit, a data slow starting circuit, a first anti-shake delay circuit, a rising slope control circuit, an isolation circuit, a second anti-shake delay circuit and an amplifying output circuit, the detection transmission circuit comprises a first MOS tube and a second MOS tube, the first and second anti-shake delay circuits are respectively connected with the first MOS tube and the second MOS tube so as to eliminate the shake delay of data, the first end of the rising slope control circuit is connected with the output end of the first MOS tube, and the second end of the rising slope control circuit is connected with the second anti-shake delay circuit through the isolation circuit so as to ensure the stability of data signals; the invention can effectively reduce the conversion delay of the detection signal and ensure that the transmission of the detection signal of the transformer is stable and efficient.
Description
Technical Field
The invention relates to the technical field of communication and fault detection, in particular to a transformer fault on-line monitoring device with a communication function.
Background
Transformers, which are one of the most important devices in electrical power plants, bear the heavy duty of voltage variation, power distribution and transmission, the operation of which is related to the safety and stability of the entire transformer system. Therefore, the on-line monitoring device is used for monitoring the running state of the transformer, and has important value for timely finding the faults of the transformer. However, in the current online monitoring device, the internal state monitoring and fault analysis of the transformer are mainly aimed at, and the internal communication mode is still lack of perfection. In addition, reliable and effective transmission of the monitoring information of the sensor is guaranteed in real time of the on-line monitoring device. Therefore, the online monitoring device for the transformer faults perfects the technical problems of poor timeliness and the like of the data communication function of the transformer faults, but the existing transformer fault signal detection circuit has high monitoring delay and weak stability, and cannot meet the requirements of users, for example:
As shown in fig. 2, in the signal detection circuit in the prior art, the signal is amplified by using the comparator LM358 chip, the noise reduction capability of the signal is weak, and the stability is poor;
As shown in fig. 3, the fault detection circuit in the prior art has strong a/D conversion capability, but has higher delay and longer transmission time difference.
Disclosure of Invention
The invention solves the problem of providing a stable and efficient transformer fault on-line monitoring device which can effectively reduce the conversion delay of detection signals.
In order to solve the problems, the invention provides a transformer fault on-line monitoring device with a communication function, which comprises a sensing circuit, a central processing module circuit and a voltage stabilizing output circuit which are sequentially connected, wherein the sensing circuit comprises a detection transmission circuit, a data slow starting circuit, a first anti-shake delay circuit, a rising slope control circuit, an isolation circuit, a second anti-shake delay circuit and an amplifying output circuit, the detection transmission circuit comprises a first MOS tube and a second MOS tube, the input end of the first MOS tube is connected with a detection interface through the data slow starting circuit, the output end of the first MOS tube is connected with the input end of the amplifying output circuit through the second MOS tube, the first anti-shake delay circuit and the second anti-shake delay circuit are respectively connected with the first MOS tube and the second MOS tube so as to eliminate the shake delay of data, the first end of the rising slope control circuit is connected with the output end of the first MOS tube, and the second end of the rising slope control circuit is connected with the second anti-shake delay circuit through the isolation circuit so as to ensure the stability of data signals.
Further, the number of the detection interfaces is 2, the sensing circuit further comprises a clamping protection circuit, the clamping protection circuit comprises a first diode and a second diode, wherein the cathode of the first diode is connected with the first detection interface, the anode of the first diode is connected with the cathode of the second diode, and the anode of the second diode is connected with the source electrode of the first MOS tube and the second detection interface respectively.
Further, the data slow start circuit comprises a first inductor and a first resistor, a first end of the first inductor is connected with the first detection interface, a first lead of the second end is connected with a power supply through the first resistor, and a second lead is connected with a grid electrode of the first MOS tube.
Further, the first anti-jitter delay circuit comprises a second resistor and a first capacitor, a first end of the first capacitor is connected with a drain electrode of the first MOS tube, a second end of the first capacitor is connected with a first end of the second resistor, and a second end of the second resistor is respectively connected with a power supply and a grid electrode of the first MOS tube; the second anti-jitter delay circuit comprises a second capacitor and a third resistor, wherein a first end of the second capacitor is connected with a drain electrode of the second MOS tube, a second end of the second capacitor is respectively connected with a first end of the second resistor and the amplifying output circuit, and a second end of the second resistor is respectively connected with a power supply and a grid electrode of the second MOS tube.
Further, the rising slope control circuit comprises a second inductor and a third capacitor, the isolation circuit comprises a third diode, the first end of the second inductor is connected with a power supply, a first lead of the second end of the second inductor is grounded through the third capacitor so as to control the rising slope of the power-on current, the second lead of the second end of the second inductor is connected with the second end of the second resistor, and a third lead of the second end of the second inductor is connected with the second end of the third resistor through the third diode.
Further, the sensing circuit further comprises a MOS tube limiting circuit, the MOS tube limiting circuit comprises a fourth resistor, a fifth resistor and a fourth diode, a first end of the fifth resistor is connected with a grid electrode of the second MOS tube, a first lead of a second end of the fifth resistor is connected with a second end of the third resistor, a second lead is connected with a power supply through the fourth resistor so as to prevent self-oscillation of the second MOS tube, an anode of the fourth diode is connected with a source electrode of the second MOS tube, and a cathode of the fourth diode is connected with the grid electrode of the second MOS tube so as to protect the grid source electrode of the second MOS tube from high-voltage breakdown.
Further, the amplifying output circuit comprises 3 triodes, wherein the base electrode of the first triode is connected with the second anti-shake time delay circuit, the collector electrode is connected with the base electrode of the third triode, the emitter electrode is connected with the base electrode of the second triode, the collector electrode of the third triode is connected with the drain electrode of the second MOS tube, the emitter electrode is connected with the input end of the central processing module circuit, the collector electrode of the second triode is connected with the power supply, and the emitter electrode is connected with the input end of the central processing module circuit.
Further, the central processing module circuit comprises a voltage value judging circuit and a comparison output circuit, wherein the input end of the voltage value judging circuit is connected with the output end of the amplifying output circuit, the comparison output circuit comprises a comparator circuit, a feedback voltage limiting circuit and a fourth capacitor, the reverse input end of the comparator circuit is connected with the output end of the voltage value judging circuit, the normal phase input end is grounded, the output end is connected with the input end of the voltage stabilizing output circuit, the feedback voltage limiting circuit is arranged between the output end and the forward input end of the comparator circuit, the fourth capacitor is an energy storage capacitor, the first end of the fourth capacitor is connected with the reverse input end of the comparator circuit, and the second end of the fourth capacitor is grounded so as to inhibit signal abrupt change of the reverse input end of the comparator circuit.
Further, the voltage value judging circuit comprises a third MOS tube and a fifth capacitor, wherein the grid electrode of the third MOS tube is connected with the input end of the amplifying output circuit through the fifth capacitor, the drain electrode of the third MOS tube is grounded, and the source electrode of the third MOS tube is connected with the reverse input end of the comparing output circuit.
Further, the voltage stabilizing output circuit comprises a fourth triode, a fifth triode, a first potentiometer and a fifth diode, wherein a grid electrode of the fourth triode is respectively connected with a collector electrode of the fifth triode and an output end of the central processing module circuit, a collector electrode of the fourth triode is connected with a power supply, an emitter electrode of the fourth triode is connected with a first end of the first potentiometer, an emitter electrode of the fifth triode is grounded, a grid electrode of the fifth triode is connected with a central contact of the first potentiometer, and a second end of the first potentiometer is suitable for being connected with an antenna.
Compared with the prior art, the invention has the beneficial effects that:
The sensing circuit is used for collecting detection data of the transformer, the detection data of the transformer are input through the detection interface and are transmitted to the amplification output circuit through the detection transmission circuit, after the amplification is carried out, the central processing module circuit analyzes and processes the data, the processed data are wirelessly transmitted to a manager through the voltage stabilizing output circuit, the data slow starting circuit can enable the detection data to be orderly transmitted through 2 MOS tubes in the process that the detection data are transmitted through the detection transmission circuit, the first and second anti-shake delay circuits are respectively connected with the first MOS tube and the second MOS tube, shake delay of data transmission can be eliminated, the problem of delay in the process of data collection, conversion and transmission of the existing transformer is solved, the rising slope control circuit can eliminate direct current load and control rising slope, meanwhile, the rising slope control circuit is connected with the anti-shake delay circuit through the isolation circuit, and can obtain undistorted large output voltage when the input detection signal is very small, and high efficiency and stability of the detection signal collection data of the transformer are guaranteed through the mode.
Drawings
FIG. 1 is a schematic diagram of the overall principle of the embodiment of the present invention;
FIG. 2 is a schematic diagram of a prior art signal detection circuit;
FIG. 3 is a schematic diagram of a prior art fault detection circuit;
FIG. 4 is a schematic diagram of a sensing circuit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a CPU circuit according to an embodiment of the present invention;
Fig. 6 is a schematic diagram of a principle structure of a voltage stabilizing output circuit according to an embodiment of the invention.
Reference numerals illustrate:
1-a sensing circuit; 2-a central processing module circuit; 3-a voltage stabilizing output circuit; 11-a detection transmission circuit; 12-amplifying the output circuit; 13-a data slow start circuit; 14-a first anti-jitter delay circuit; 15-a rising slope control circuit; 16-a second anti-jitter delay circuit.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present specification, the descriptions of the terms "embodiment," "one embodiment," and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or embodiment is included in at least one embodiment or illustrated embodiment of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same examples or implementations. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or implementations.
As shown in fig. 1, the invention provides a transformer fault on-line monitoring device with a communication function, which comprises a sensing circuit 1, a central processing module circuit 2 and a voltage stabilizing output circuit 3 which are sequentially connected, wherein the transformer fault on-line monitoring device is designed at this time, the sensing module circuit carries out multi-contact and multi-variable monitoring on a transformer in a working state, the central processing module circuit 2 carries out threshold judgment processing on monitoring data, and a wireless transmission module sends the monitoring and judgment data out. The sensing circuit 1 is mainly responsible for monitoring the working state of the transformer in real time and transmitting monitoring data to the central processing module. The central processing module circuit 2 amplifies and thresholdes the monitored data to obtain the real-time working state of the current transformer, and then transmits the obtained judgment result to the infinite transmission module. The wireless transmission module circuit is designed by mainly utilizing a radio frequency antenna module, and meanwhile, the influence of a transmission signal on a data result of the rotary transformer is reduced by utilizing a power amplifier and a low noise amplifier in a wireless mode.
In one embodiment of the present invention, the sensing circuit 1 includes a detection transmission circuit 11, a data slow start circuit 13, a first anti-jitter delay circuit 14, a rising slope control circuit 15, an isolation circuit, a second anti-jitter delay circuit 16, and an amplifying output circuit 12, the detection transmission circuit 11 includes a first MOS transistor and a second MOS transistor, an input end of the first MOS transistor is connected to a detection interface through the data slow start circuit 13, an output end of the first MOS transistor is connected to an input end of the amplifying output circuit 12 through the second MOS transistor, the first and second anti-jitter delay circuits 16 are respectively connected to the first MOS transistor and the second MOS transistor, To eliminate jitter delay of data, a first end of the rising slope control circuit 15 is connected with an output end of the first MOS tube, a second end is connected with the second jitter prevention delay circuit 16 through the isolation circuit to ensure stability of data signals, wherein 2 detection interfaces are provided, the perception circuit 1 further comprises a clamping protection circuit which comprises a first diode and a second diode, wherein a cathode of the first diode is connected with the first detection interface, an anode of the second diode is connected with a cathode of the second diode, an anode of the second diode is respectively connected with a source electrode of the first MOS tube and the second detection interface, the data slow start circuit 13 comprises a first inductor and a first resistor, a first end of the first inductor is connected with the first detection interface, a first lead wire of a second end is connected with a power supply through the first resistor, and a second lead wire is connected with a grid electrode of the first MOS tube; the first anti-jitter delay circuit 14 includes a second resistor and a first capacitor, a first end of the first capacitor is connected to the drain of the first MOS transistor, a second end of the first capacitor is connected to a first end of the second resistor, and a second end of the second resistor is connected to a power supply and a gate of the first MOS transistor, respectively; the second anti-jitter delay circuit 16 includes a second capacitor and a third resistor, wherein a first end of the second capacitor is connected with the drain electrode of the second MOS transistor, a second end of the second capacitor is respectively connected with the first end of the second resistor and the amplifying output circuit 12, and a second end of the second resistor is respectively connected with a power supply and the gate electrode of the second MOS transistor; The rising slope control circuit 15 includes a second inductor and a third capacitor, the isolation circuit includes a third diode, a first end of the second inductor is connected to a power supply, a first lead of a second end of the second inductor is grounded through the third capacitor to control a rising slope of the power-on current, a second lead of the second end of the second inductor is connected to a second end of the second resistor, and a third lead of the second end of the second inductor is connected to a second end of the third resistor through the third diode; the sensing circuit 1 further comprises a MOS tube limiting circuit, the MOS tube limiting circuit comprises a fourth resistor, a fifth resistor and a fourth diode, a first end of the fifth resistor is connected with a grid electrode of the second MOS tube, a first lead of a second end of the fifth resistor is connected with a second end of the third resistor, a second lead is connected with a power supply through the fourth resistor so as to prevent self-oscillation of the second MOS tube, an anode of the fourth diode is connected with a source electrode of the second MOS tube, and a cathode of the fourth diode is connected with a grid electrode of the second MOS tube so as to protect the grid source electrode of the second MOS tube from high-voltage breakdown.
It should be noted that, as shown in fig. 4, the sensing circuit 1 mainly monitors the transformer in operation in real time, and transmits the monitored data to the central processing module. Firstly, voltage data of monitoring points of a transformer are transmitted into a circuit through two detection interfaces V1 and V1-1, then 2 clamping diodes of a first diode D1 and a second diode D5 are utilized to prevent the input voltage from being too large to damage a later-stage circuit, and meanwhile, a first inductor L2 and a first resistor R3 form a first group of data slow start. At the first MOS tube Q4, the second resistor R9 and the first capacitor C5 realize the anti-shake time delay function, and form a first anti-shake time delay circuit 14, and the resistor R9-1 is used for current limiting. The second inductor L1 and the third capacitor C1 form a rising slope control circuit 15 for controlling the rising slope of the power-on current, meanwhile, the capacitor C5-2 is utilized to filter the direct current load voltage, the fourth resistor R1 and the fifth resistor R6 are used for preventing the MOS tube from self-oscillation, the fourth diode D4 is a clamping diode and is used for protecting the grid-source electrode of the second MOS tube Q5 from high voltage breakdown; the third diode D2 can isolate the second anti-jitter delay circuit 16 formed by the third resistor R7 and the second capacitor C3 and the power-on slope control circuit after the MOS transistor is turned on, so that even if the monitoring signal of filtering the dc voltage is very small, a larger output voltage without distortion can be obtained, and finally the output voltage is amplified by the amplifying output circuit 12, so that the high efficiency and stability of the input signal and the data are ensured.
In one embodiment of the present invention, the amplifying output circuit 12 includes 3 triodes, where a base electrode of a first triode is connected to the second anti-jitter delay circuit 16, a collector electrode of the first triode is connected to a base electrode of a third triode, an emitter electrode of the third triode is connected to a base electrode of the second triode, a collector electrode of the third triode is connected to a drain electrode of the second MOS tube, an emitter electrode of the third triode is connected to an input end of the central processing module circuit 2, a collector electrode of the second triode is connected to a power supply, and an emitter electrode of the second triode is connected to an input end of the central processing module circuit 2.
It should be noted that, as shown in fig. 4, the three triodes are utilized to output after being amplified in cascade, and the effective output signal is provided for the circuit through the difference value of the signals, and meanwhile, the purpose of resisting common-mode interference is achieved, wherein the first triode Q2 is primary amplification, the second triode Q1 and the third triode Q3 form the differential amplification of the later stage, and interference can be effectively inhibited.
In one embodiment of the present invention, the central processing module circuit 2 includes a voltage value judging circuit and a comparison output circuit, wherein an input end of the voltage value judging circuit is connected to an output end of the amplifying output circuit 12, the comparison output circuit includes a comparator circuit, a feedback voltage limiting circuit and a fourth capacitor, a reverse input end of the comparator circuit is connected to an output end of the voltage value judging circuit, a non-inverting input end of the comparator circuit is grounded, an output end of the comparator circuit is connected to an input end of the voltage stabilizing output circuit 3, the feedback voltage limiting circuit is disposed between an output end and a forward input end of the comparator circuit, the fourth capacitor is an energy storage capacitor, a first end of the fourth capacitor is connected to a reverse input end of the comparator circuit, and a second end of the fourth capacitor is grounded so as to inhibit signal abrupt change of the reverse input end of the comparator circuit; the voltage value judging circuit comprises a third MOS tube and a fifth capacitor, wherein the grid electrode of the third MOS tube is connected with the input end of the amplifying output circuit 12 through the fifth capacitor, the drain electrode of the third MOS tube is grounded, and the source electrode of the third MOS tube is connected with the reverse input end of the comparing output circuit.
It should be noted that, as shown in fig. 5, the central processing module circuit 2 amplifies and thresholds the monitored data to obtain the real-time working state of the current transformer, and then transmits the obtained judgment result to the infinite transmission module. The signal is coupled in through a fifth capacitor C8 and is subjected to first step voltage value judgment processing through the grid electrode of a third MOS tube Q8. If the amplified voltage value is still smaller and the field effect transistor cannot be started, the amplified voltage value is judged to be environmental noise and is invalid. Then input to comparator U1's inverting terminal, resistance R22 and electric capacity C11 constitute the RC circuit, resistance R21 carries out the drop-down to inverting terminal input signal, guarantee that signal state is stable, in addition, it is through fourth electric capacity C10 energy storage, ensure that the signal can not break, the signal feeds back to inverting terminal through resistance R12 and electric capacity C6, feedback to the homophase end through resistance R25, resistance R24, comparator U1 compares the signal and carries out feedback stack processing with the output signal, wherein diode D7 and diode D9 constitute feedback voltage limiting circuit, carry out the restriction of feedback signal voltage.
In one embodiment of the present invention, the voltage stabilizing output circuit 3 includes a fourth triode, a fifth triode, a first potentiometer and a fifth diode, where a gate of the fourth triode is connected to a collector of the fifth triode and an output end of the central processing module circuit 2, respectively, a collector of the fourth triode is connected to a power supply, an emitter of the fourth triode is connected to a first end of the first potentiometer, an emitter of the fifth triode is grounded, a gate of the fifth triode is connected to a center contact of the first potentiometer, and a second end of the first potentiometer is adapted to be connected to an antenna.
As shown in fig. 6, the voltage stabilizing output circuit 3 mainly sends a detection signal through a wireless antenna, the signal input is pulled up through a resistor R16, energy is stored through a capacitor C9, the signal is input to a base electrode of a fourth triode Q6 and a collector electrode of a fifth triode Q7, a fifth diode D8 clamps the signal, and a stable signal is output after being adjusted by a first potentiometer R18, so that the stability and the high efficiency of the wireless transmission of the signal are ensured.
Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the invention.
Claims (6)
1. The transformer fault on-line monitoring device with the communication function comprises a sensing circuit (1), a central processing module circuit (2) and a voltage stabilizing output circuit (3) which are sequentially connected, and is characterized in that the sensing circuit (1) comprises a detection transmission circuit (11), a data slow starting circuit (13), a first anti-jitter delay circuit (14), a rising slope control circuit (15), an isolation circuit, a second anti-jitter delay circuit (16) and an amplifying output circuit (12), the detection transmission circuit (11) comprises a first MOS tube and a second MOS tube, the input end of the first MOS tube is connected with a first detection interface through the data slow starting circuit (13), the output end of the first MOS tube is connected with the input end of the amplifying output circuit (12) through the second MOS tube, the first anti-jitter delay circuit (14) and the second anti-jitter delay circuit (16) are respectively connected with the first MOS tube and the second MOS tube so as to eliminate the jitter delay of data, the first end of the rising slope control circuit (15) is connected with the output end of the first MOS tube through the second MOS tube, and the second MOS tube is connected with the data stabilizing circuit (16);
The sensing circuit (1) further comprises a clamping protection circuit, the clamping protection circuit comprises a first diode and a second diode, the cathode of the first diode is connected with the first detection interface, the anode of the first diode is connected with the cathode of the second diode, and the anode of the second diode is connected with the source electrode of the first MOS tube and the second detection interface respectively;
the data slow start circuit (13) comprises a first inductor and a first resistor, a first end of the first inductor is connected with the first detection interface, a first lead wire of a second end is connected with a power supply through the first resistor, and a second lead wire is connected with a grid electrode of the first MOS tube;
The first anti-jitter delay circuit (14) comprises a second resistor and a first capacitor, a first end of the first capacitor is connected with the drain electrode of the first MOS tube, a second end of the first capacitor is connected with a first end of the second resistor, and a second end of the second resistor is respectively connected with a power supply and the grid electrode of the first MOS tube; the second anti-jitter delay circuit (16) comprises a second capacitor and a third resistor, a first end of the second capacitor is connected with the drain electrode of the second MOS tube, a second end of the second capacitor is respectively connected with the first end of the second resistor and the amplifying output circuit (12), and a second end of the second resistor is respectively connected with a power supply and the grid electrode of the second MOS tube;
The rising slope control circuit (15) comprises a second inductor and a third capacitor, the isolation circuit comprises a third diode, the first end of the second inductor is connected with a power supply, a first lead wire of the second end of the second inductor is grounded through the third capacitor so as to control the rising slope of power-on current, the second lead wire of the second end of the second inductor is connected with the second end of the second resistor, and a third lead wire of the second end of the second inductor is connected with the second end of the third resistor through the third diode.
2. The transformer fault on-line monitoring device with a communication function according to claim 1, wherein the sensing circuit (1) further comprises a MOS tube limiting circuit, the MOS tube limiting circuit comprises a fourth resistor, a fifth resistor and a fourth diode, a first end of the fifth resistor is connected with a gate of the second MOS tube, a first lead of a second end of the fifth resistor is connected with a second end of the third resistor, a second lead is connected with a power supply through the fourth resistor so as to prevent self-oscillation of the second MOS tube, an anode of the fourth diode is connected with a source electrode of the second MOS tube, and a cathode of the fourth diode is connected with a gate electrode of the second MOS tube so as to protect a gate source electrode of the second MOS tube from high voltage breakdown.
3. The transformer fault on-line monitoring device with a communication function according to claim 1, wherein the amplifying output circuit (12) comprises 3 triodes, wherein a base electrode of a first triode is connected with the second anti-jitter delay circuit (16), a collector electrode of the first triode is connected with a base electrode of a third triode, an emitter electrode of the first triode is connected with a base electrode of a second triode, a collector electrode of the third triode is connected with a drain electrode of the second MOS tube, an emitter electrode of the third triode is connected with an input end of the central processing module circuit (2), a collector electrode of the second triode is connected with a power supply, and an emitter electrode of the second triode is connected with an input end of the central processing module circuit (2).
4. The transformer fault on-line monitoring device with a communication function according to claim 1, wherein the central processing module circuit (2) comprises a voltage value judging circuit and a comparison output circuit, an input end of the voltage value judging circuit is connected with an output end of the amplifying output circuit (12), the comparison output circuit comprises a comparator circuit, a feedback voltage limiting circuit and a fourth capacitor, an inverted input end of the comparator circuit is connected with an output end of the voltage value judging circuit, a normal phase input end is grounded, an output end of the comparator circuit is connected with an input end of the voltage stabilizing output circuit (3), the feedback voltage limiting circuit is arranged between an output end and a normal phase input end of the comparator circuit, the fourth capacitor is an energy storage capacitor, a first end of the fourth capacitor is connected with an inverted input end of the comparator circuit, and a second end of the fourth capacitor is grounded so as to inhibit signal abrupt changes of the inverted input end of the comparator circuit.
5. The transformer fault on-line monitoring device with the communication function according to claim 4, wherein the voltage value judging circuit comprises a third MOS tube and a fifth capacitor, a grid electrode of the third MOS tube is connected with an input end of the amplifying output circuit (12) through the fifth capacitor, a drain electrode is grounded, and a source electrode is connected with an inverted input end of the comparing output circuit.
6. The transformer fault on-line monitoring device with a communication function according to claim 1, wherein the voltage stabilizing output circuit (3) comprises a fourth triode, a fifth triode, a first potentiometer and a fifth diode, a grid electrode of the fourth triode is respectively connected with a collector electrode of the fifth triode and an output end of the central processing module circuit (2), a collector electrode of the fourth triode is connected with a power supply, an emitter electrode of the fourth triode is connected with a first end of the first potentiometer, an emitter electrode of the fifth triode is grounded, a grid electrode of the fifth triode is connected with a central contact of the first potentiometer, and a second end of the first potentiometer is suitable for being connected with an antenna.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310022443.XA CN116184073B (en) | 2023-01-07 | 2023-01-07 | Transformer fault on-line monitoring device with communication function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310022443.XA CN116184073B (en) | 2023-01-07 | 2023-01-07 | Transformer fault on-line monitoring device with communication function |
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| CN116015321A (en) * | 2023-01-03 | 2023-04-25 | 深圳市西京电力科技有限公司 | Novel wireless communication rotary transformer |
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| CN107404221A (en) * | 2017-07-31 | 2017-11-28 | 深圳市菲菱科思通信技术股份有限公司 | Power supply slow switch circuit |
| CN215813163U (en) * | 2021-07-30 | 2022-02-11 | 深圳拓邦股份有限公司 | Fault detection circuit, BMS system, power supply unit and trade electric cabinet of switch pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116015321A (en) * | 2023-01-03 | 2023-04-25 | 深圳市西京电力科技有限公司 | Novel wireless communication rotary transformer |
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