CN105589022A - Transformer fault auscultation instrument - Google Patents
Transformer fault auscultation instrument Download PDFInfo
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- CN105589022A CN105589022A CN201610146155.5A CN201610146155A CN105589022A CN 105589022 A CN105589022 A CN 105589022A CN 201610146155 A CN201610146155 A CN 201610146155A CN 105589022 A CN105589022 A CN 105589022A
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1209—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using acoustic measurements
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
-
- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
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Abstract
The invention belongs to the technical field of a transformer fault detection apparatus, and especially relates to a transformer fault auscultation instrument. The transformer fault auscultation instrument which can timely detect and analyze transformer faults is provided to solve the technical problem. The employed technical scheme comprises the following contents that the transformer fault auscultation instrument includes a signal input module, a signal regulating circuit, an A/D collection circuit, an MCU processer, an LED display screen, and a loudspeaker; an output end of the signal input module is electrically connected to an input end of the signal regulating circuit; an output end of the signal regulating circuit is electrically connected to an input end of the A/D collection circuit; an output end of the A/D collection circuit is electrically connected to an input end of the MCU processer; an output end of the MCU processer is electrically connected to an input end of the LED display screen and an input end of the loudspeaker; and the signal regulating circuit includes a first-stage amplification circuit, a second-stage amplification circuit, and a converting circuit. The transformer fault auscultation instrument is suitable for electric power departments.
Description
Technical field
The invention belongs to the technical field of transformer fault checkout gear, be specifically related to a kind of transformer fault auscultation instrument.
Background technology
Power equipment is the core that forms intelligent grid, and its normal operation is the basic assurance of power grid security. In intelligent grid, transformer is nucleus equipment, also be one of equipment that power system accident is relatively many, its operational reliability directly affects the normal production of power industry, check at any time transformer state, find and get rid of its contingent fault, having become the important means that ensures power supply reliability.
The 1950's, along with the proposition of power system device monitoring concept, various monitoring method arises, some industrially developed country are the research of initial state monitoring and fault diagnosis technology, to the eighties to the nineties, development and the application of the new and high technologies such as sensing technology, computer technology and optical fiber, developed rapidly the condition monitoring and fault diagnosis technology of power equipment. Analysis and the inspection method of power industry to Power Transformer Faults is many both at home and abroad at present, but not having a kind of is to utilize the auscultation method in traditional Chinese medical science field to carry out, but adopt the technology such as partial discharge monitoring, localization by ultrasonic, dielectric oil chromatographic analysis to detect internal discharge and insulation status, in these methods, annual regular oil sample extracts and not only can not provide significant information for the real safe condition that judges transformer, and the cycle of inspection and test is longer, hysteresis quality is more serious, brings potential safety hazard to the safe operation of transformer.
Summary of the invention
The present invention overcomes the deficiency that prior art exists, and technical problem to be solved is for providing a kind of: the transformer fault auscultation instrument of determination and analysis transformer fault in time.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: transformer fault auscultation instrument, comprise signal input module, signal adjustment circuit A/D Acquisition Circuit, MCU processor, LED display and loudspeaker, the output of described signal input module and the electrical connection of the input of described signal adjustment circuit, the input electrical connection of the output of described signal adjustment circuit and described A/D Acquisition Circuit, the input electrical connection of the output of described A/D Acquisition Circuit and described MCU processor, the output of described MCU processor is electrically connected with the input of described LED display and the input of described loudspeaker respectively, described signal adjustment circuit comprises one-level amplifying circuit, second amplifying circuit and change-over circuit, the input of described one-level amplifying circuit is the input of described signal adjustment circuit, the output of described one-level amplifying circuit and the electrical connection of the input of described second amplifying circuit, the output of described second amplifying circuit and the electrical connection of the input of described change-over circuit, the output of described change-over circuit is the output of described signal adjustment circuit.
Preferably, described signal input module comprises sound transducer B1, and described one-level amplifying circuit comprises NPN type triode V1, and described second amplifying circuit comprises NPN type triode V2, and described change-over circuit comprises transformer T1, the output of described sound transducer B1 is connected with one end of capacitor C 1, one end of the other end contact resistance R1 of described capacitor C 1, the base stage of one end of capacitor C 2 and described NPN type triode V1, the colelctor electrode of described NPN type triode V1 connects a stiff end of variable resistor RP1 and one end of capacitor C 3, one end of emitter stage contact resistance R2 of described NPN type triode V1 and one end of capacitor C 4, the other end of described resistance R 1 connects another stiff end of described variable resistor RP1, the movable end of described variable resistor RP1, one end of capacitor C 5, one end of one end of resistance R 4 and resistance R 3, the other end of described capacitor C 3 is connected with a stiff end of variable resistor RP2, the movable end of described variable resistor RP2 is connected with one end of capacitor C 6, the other end of described capacitor C 6 connects the base stage of the other end and the NPN type triode V2 of described resistance R 3, the colelctor electrode of described NPN type triode V2 connects one end of capacitor C 7 and the input a1 of described transformer T1, the input a2 of described transformer T1 connects the other end of described resistance R 4, one end of resistance R 5, the colelctor electrode of positive-negative-positive triode V3, one end of capacitor C 9 and+6V power supply, the first output b1 of described transformer T1 is connected with the base stage of described positive-negative-positive triode V3, the first output b2 of described transformer T1 connects the other end of described resistance R 5 and one end of resistance R 6, the second output w1 of described transformer T1 is connected with the base stage of positive-negative-positive triode V4, one end of the second output w2 contact resistance R7 of described transformer T1 and one end of resistance R 8, the emitter stage of described positive-negative-positive triode V4 connects the other end of described resistance R 7, the other end of described resistance R 6, the emitter stage of described positive-negative-positive triode V3 with
And one end of capacitor C 8, the other end of described capacitor C 8 is connected with the input of described A/D Acquisition Circuit, earth terminal, the other end of described capacitor C 5 and the equal ground connection of the other end of described capacitor C 9 of another stiff end of the other end of the earth terminal of described A/D Acquisition Circuit, the colelctor electrode of described positive-negative-positive triode V4, described resistance R 8, the other end of described capacitor C 7, the emitter stage of described NPN type triode V2, described variable resistor RP2, the other end of described capacitor C 4, the other end of described resistance R 2, the other end of described capacitor C 2, described sound transducer B1.
Preferably, described sound transducer B1 is electret-type microphone.
Preferably, described MCU processor comprises processing module, determination module and memory module.
The present invention compared with prior art has following beneficial effect:
Transformer fault auscultation instrument in the present invention comprises signal input module, signal adjustment circuit A/D Acquisition Circuit, MCU processor, LED display and loudspeaker, after sound when signal input module gathers transformer operation, this voice signal is passed to signal adjustment circuit, signal adjustment circuit to signal adjust and detection after, send MCU processor to through A/D Acquisition Circuit, after MCU processor is processed to the received signal, directly becoming voice signal informs inspection personnel by loudspeaker on the one hand, inspection personnel screens by the voice signal that transformer is sent, and then the health status of judgement transformer, on the other hand, MCU processor shows sound arteries and veins signal on LED display, inspection personnel is by checking and compare the waveform on LED display, whether extremely, determine in time transformer.
Brief description of the drawings
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
Fig. 1 is circuit structure block diagram provided by the invention;
Fig. 2 is the structural representation of signal adjustment circuit provided by the invention;
In figure: 101 is signal input module, 102 is signal adjustment circuit, and 103 is A/D Acquisition Circuit, and 104 is MCU processor, and 1041 is processing module, and 1042 is determination module, and 1043 is memory module, and 105 is LED display, and 106 is loudspeaker.
Detailed description of the invention
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiment; Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The theory of traditional Chinese medical science of " hope, hear, ask, cut " is also followed in the inspection of power equipment and fault judgement, the internal organ of human body have been used to audible inspection method, normal and the abnormal running of power transformer also has certain rule so, by inspection and the record of sound that transformer internal operation parts are sent, just can realize its health status is judged, the firsthand information is provided to checking experiment transformer.
Fig. 1 is circuit structure block diagram provided by the invention, as shown in the figure, transformer fault auscultation instrument, comprise signal input module 101, signal adjustment circuit 102, A/D Acquisition Circuit 103, MCU processor 104, LED display 105 and loudspeaker 106, the input electrical connection of the output of described signal input module 101 and described signal adjustment circuit 102, the input electrical connection of the output of described signal adjustment circuit 102 and described A/D Acquisition Circuit 103, the input electrical connection of the output of described A/D Acquisition Circuit 103 and described MCU processor 104, the output of described MCU processor 104 is electrically connected with the input of described LED display 105 and the input of described loudspeaker 106 respectively, described signal adjustment circuit 102 comprises one-level amplifying circuit, second amplifying circuit and change-over circuit, the input of described one-level amplifying circuit is the input of described signal adjustment circuit 102, the output of described one-level amplifying circuit and the electrical connection of the input of described second amplifying circuit, the output of described second amplifying circuit and the electrical connection of the input of described change-over circuit, the output of described change-over circuit is the output of described signal adjustment circuit 102.
Particularly, described MCU processor 104 can comprise processing module 1041, determination module 1042 and memory module 1043.
What the transformer fault auscultation instrument in the present invention received is wideband frequency signal, therefore need described signal input module 101 to convert wideband frequency signal to the signal of telecommunication, the various sound that through described signal adjustment circuit 102, transformer sent are again adjusted and detection, then giving described MCU processor 104 via described A/D Acquisition Circuit 103 processes, storage, described MCU processor 104 is compared and judges the sound and the fault category that receive, directly become voice and inform inspection personnel by described loudspeaker 106, and be located on described LED display 105 and show in real time according to user, so that whether user examines sound waveform and distorts, in addition, Wave data can be by serial communication side
Formula is passed to host computer (PC), and processing capacity and the analog oscilloscope software of recycling host computer show noise waveform. the sound sending while work for transformer, work about electric power personnel are by long contact and grope to draw following rule: while normally operation, sound is uniform hum, internal discharge sound is electric discharge sound, multipoint earthing of iron core sound is slight Bi Boyin, phase shortage or high-voltage connection disconnect does not have sound, shunting switch is not in place is larger Qiu Qiuyin, it is dingdingdangdang sound or z z z sound that box house is fallen into foreign matter and core through screw rod loosening, have screw washer is the sound that creaks in fuel tank, the dirty breakage of sleeve pipe is the sound of neighing, outside line broken string or short circuit are purt purt sounds, overload is overcast buzz, short circuit in winding is bubble bubble boiling water sound.
Described signal input module 101 can comprise sound transducer B1, and described one-level amplifying circuit can comprise NPN type triode V1, and described second amplifying circuit can comprise NPN type triode V2, and described change-over circuit can comprise transformer T1, the output of described sound transducer B1 is connected with one end of capacitor C 1, one end of the other end contact resistance R1 of described capacitor C 1, the base stage of one end of capacitor C 2 and described NPN type triode V1, the colelctor electrode of described NPN type triode V1 connects a stiff end of variable resistor RP1 and one end of capacitor C 3, one end of emitter stage contact resistance R2 of described NPN type triode V1 and one end of capacitor C 4, the other end of described resistance R 1 connects another stiff end of described variable resistor RP1, the movable end of described variable resistor RP1, one end of capacitor C 5, one end of one end of resistance R 4 and resistance R 3, the other end of described capacitor C 3 is connected with a stiff end of variable resistor RP2, the movable end of described variable resistor RP2 is connected with one end of capacitor C 6, the other end of described capacitor C 6 connects the base stage of the other end and the NPN type triode V2 of described resistance R 3, the colelctor electrode of described NPN type triode V2 connects one end of capacitor C 7 and the input a1 of described transformer T1, the input a2 of described transformer T1 connects the other end of described resistance R 4, one end of resistance R 5, the colelctor electrode of positive-negative-positive triode V3, one end of capacitor C 9 and+6V power supply, the first output b1 of described transformer T1 is connected with the base stage of described positive-negative-positive triode V3, the first output b2 of described transformer T1 connects the other end of described resistance R 5 and one end of resistance R 6, the second output w1 of described transformer T1 is connected with the base stage of positive-negative-positive triode V4, one end of the second output w2 contact resistance R7 of described transformer T1 and one end of resistance R 8, the emitter stage of described positive-negative-positive triode V4 connects the other end of described resistance R 7, the other end of described resistance R 6, the emitter stage of described positive-negative-positive triode V3 and one end of capacitor C 8, the other end of described capacitor C 8 is connected with the input of described A/D Acquisition Circuit 103, the earth terminal of described A/D Acquisition Circuit (103), the colelctor electrode of described positive-negative-positive triode V4, the other end of described resistance R 8, the other end of described capacitor C 7, the emitter stage of described NPN type triode V2, another stiff end of described variable resistor RP2, described electricity
Hold earth terminal, the other end of described capacitor C 5 and the equal ground connection of the other end of described capacitor C 9 of the other end of C4, the other end of described resistance R 2, the other end of described capacitor C 2, described sound transducer B1.
In the present invention, due to transformer fault phenomenon difference, the sound sending is also different, therefore can select microphone as sound transducer, sound transducer has a variety of, and this case to the selection principle of sound transducer is: highly sensitive, antijamming capability is strong, except extracting voice signal, also require it not to be subject to the interference of outer signals. So this case can select electret-type microphone to be used as sound transducer B1, wherein sound pick-up is selected old-fashioned stethoscopic vibrating diaphragm head part, put the long rubber tube of 2M at vibrating diaphragm ear handle, a miniature electret microphone is inserted in other end, 2 wires of microphone are received the pickup place in circuit, Electret condenser microphone place casing reinforcement, damages sound pick-up when preventing from operating, prevents unnecessary noise jamming simultaneously.
The present invention adopts the on-the-spot auscultation method to operating transformer, can recognize in time the sound that transformer sends, directly judge its ruuning situation according to transformer internal sound, thereby judge abnormal position and classification, help maintainer to find fast defect, also can provide foundation for whether transformer continues operation.
Finally it should be noted that: above each embodiment is only in order to technical scheme of the present invention to be described, but not to it
Restriction; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (4)
1. transformer fault auscultation instrument, it is characterized in that: comprise signal input module (101), signal adjustment circuit (102) A/D Acquisition Circuit (103), MCU processor (104), LED display (105) and loudspeaker (106), the input electrical connection of the output of described signal input module (101) and described signal adjustment circuit (102), the input electrical connection of the output of described signal adjustment circuit (102) and described A/D Acquisition Circuit (103), the input electrical connection of the output of described A/D Acquisition Circuit (103) and described MCU processor (104), the output of described MCU processor (104) is electrically connected with the input of described LED display (105) and the input of described loudspeaker (106) respectively, described signal adjustment circuit (102) comprises one-level amplifying circuit, second amplifying circuit and change-over circuit, the input of described one-level amplifying circuit is the input of described signal adjustment circuit (102), the output of described one-level amplifying circuit and the electrical connection of the input of described second amplifying circuit, the output of described second amplifying circuit and the electrical connection of the input of described change-over circuit, the output of described change-over circuit is the output of described signal adjustment circuit (102).
2. transformer fault auscultation instrument according to claim 1, it is characterized in that: described signal input module (101) comprises sound transducer B1, described one-level amplifying circuit comprises NPN type triode V1, described second amplifying circuit comprises NPN type triode V2, and described change-over circuit comprises transformer T1;
The output of described sound transducer B1 is connected with one end of capacitor C 1, one end of the other end contact resistance R1 of described capacitor C 1, the base stage of one end of capacitor C 2 and described NPN type triode V1, the colelctor electrode of described NPN type triode V1 connects a stiff end of variable resistor RP1 and one end of capacitor C 3, one end of emitter stage contact resistance R2 of described NPN type triode V1 and one end of capacitor C 4, the other end of described resistance R 1 connects another stiff end of described variable resistor RP1, the movable end of described variable resistor RP1, one end of capacitor C 5, one end of one end of resistance R 4 and resistance R 3, the other end of described capacitor C 3 is connected with a stiff end of variable resistor RP2, the movable end of described variable resistor RP2 is connected with one end of capacitor C 6, the other end of described capacitor C 6 connects the base stage of the other end and the NPN type triode V2 of described resistance R 3, the colelctor electrode of described NPN type triode V2 connects one end of capacitor C 7 and the input a1 of described transformer T1, the input a2 of described transformer T1 connects the other end of described resistance R 4, one end of resistance R 5, the colelctor electrode of positive-negative-positive triode V3, one end of capacitor C 9 and+6V power supply, the first output b1 of described transformer T1 is connected with the base stage of described positive-negative-positive triode V3, the first output b2 of described transformer T1 connects the other end of described resistance R 5 and one end of resistance R 6, the second output w1 of described transformer T1 is connected with the base stage of positive-negative-positive triode V4, one end of the second output w2 contact resistance R7 of described transformer T1 and one end of resistance R 8, the emitter stage of described positive-negative-positive triode V4 connects the other end of described resistance R 7, the other end of described resistance R 6, the emitter stage of described positive-negative-positive triode V3 and one end of capacitor C 8, the other end of described capacitor C 8 is connected with the input of described A/D Acquisition Circuit (103), the earth terminal of described A/D Acquisition Circuit (103), the colelctor electrode of described positive-negative-positive triode V4, the other end of described resistance R 8, the other end of described capacitor C 7, the emitter stage of described NPN type triode V2, another stiff end of described variable resistor RP2, the other end of described capacitor C 4, the other end of described resistance R 2, the other end of described capacitor C 2, the earth terminal of described sound transducer B1, the equal ground connection of the other end of the other end of described capacitor C 5 and described capacitor C 9.
3. transformer fault auscultation instrument according to claim 2, is characterized in that: described sound transducer B1 is electret-type microphone.
4. transformer fault auscultation instrument according to claim 1, is characterized in that: described MCU processor (104) comprises processing module (1041), determination module (1042) and memory module (1043).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610146155.5A CN105589022A (en) | 2016-03-15 | 2016-03-15 | Transformer fault auscultation instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610146155.5A CN105589022A (en) | 2016-03-15 | 2016-03-15 | Transformer fault auscultation instrument |
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| CN105589022A true CN105589022A (en) | 2016-05-18 |
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| CN201610146155.5A Pending CN105589022A (en) | 2016-03-15 | 2016-03-15 | Transformer fault auscultation instrument |
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Cited By (2)
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| CN106323456A (en) * | 2016-08-18 | 2017-01-11 | 济南学泰电子科技有限公司 | Sound detecting type electric power equipment operation state monitor and sound detecting type electric power equipment operation state monitoring method |
| CN106485991A (en) * | 2016-12-23 | 2017-03-08 | 天津城建大学 | Sound three elements demonstrator |
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