CN105759099A - Intelligent electronic current transformer - Google Patents
Intelligent electronic current transformer Download PDFInfo
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- CN105759099A CN105759099A CN201610114488.XA CN201610114488A CN105759099A CN 105759099 A CN105759099 A CN 105759099A CN 201610114488 A CN201610114488 A CN 201610114488A CN 105759099 A CN105759099 A CN 105759099A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
- G01R15/183—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core
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Abstract
The invention relates to an intelligent electronic current transformer. The current transformer comprises an electronic current transformer body, a partial discharge detector and an ARM chip. The partial discharge detector is used for detecting the defect type of a housing of the electronic current transformer body. The ARM chip receives and transmits the detection result of the defect type to a remote measurement server. The invention can be used for achieving automatic defect detection of the on-site housing portion of the electronic current transformer while optimizing the structure of the electronic current transformer.
Description
The divisional application of patent that the present invention is application number is 2015107825870, the applying date is on November 16th, 2015, denomination of invention is " Intelligent electronic optical pole current transformer ".
Technical field
The present invention relates to power domain, particularly relate to a kind of Intelligent electronic optical pole current transformer.
Background technology
The developing history of transformer: transformer came across for 19 end of the centurys the earliest.Development along with power industry, electric pressure and the accurate rank of transformer all improve a lot, there have been developed a lot of extraordinary transformer, such as voltage, electric current combined type transformer, DC current transformer, the current ratio device of high accuracy and voltage ratio device, big electric current laser type current transformer, electronic circuit compensates transformer, photo-electricity mutual-inductor in extra-high pressure system, and voltage in SF6 fully closed combined electric unit (GIS), current transformer.In power industry, the power system of what electric pressure and scale to be developed, it is necessary to the transformer of development relevant voltage grade and accuracy, for the needs of power system measuring, protection and control.
Continuous application along with a lot of new materials, transformer also occurs in that much new kind, electromagnetic transformer obtains and develops more fully, and wherein core type current transformer has adapted to the growth requirement of power construction with dry type, oil immersed type and gas-insulating type various structures.Continuous growth however as power transmission capabilities; line voltage grade improve constantly and protect the constantly perfect of requirement; general core type current transformer structure exposes weakness incompatible with it gradually; its intrinsic volume is big, magnetic saturation, ferromagnetic resonance, dynamic range are little; the weakness such as service band is narrow, it is difficult to the full development need being difficult to meet a new generation's Automation of Electric Systems, electric power digital network etc..Along with developing rapidly of photoelectron technology, many science and technology developed countries turn to sight the electronic current mutual inductor utilizing optical sensing technology and electronics method to carry out Development of Novel, are called for short photoelectric current inductor.The standard of International Power association distributing electronic formula current transformer.The implication of electronic mutual inductor, except including the transformer of photo-electric, also includes other and various utilizes the voltage of Electronic Testing principle, current sensor.
But, there is following defect in existing electronic current mutual inductor: (1) structural redundancy is high, and power dissipation ratio is not ideal enough, the product causing producing second-rate；(2) transformer itself lacks the testing mechanism to internal defects and External Defect, still adopts human at periodic intervals to pinpoint the pattern of detection, and the accuracy of testing result and real-time cannot be protected.
Therefore, the present invention proposes a kind of Intelligent electronic optical pole current transformer, by optimizing the structure of original electronic current mutual inductor, improve end product quality, better meet the demand of buying side, it addition, carry out oneself's detection at the integrated number of drawbacks detection equipment of transformer itself, improve the intelligent level of transformer.
Summary of the invention
In order to solve the technical problem that prior art exists, the invention provides a kind of Intelligent electronic optical pole current transformer, transform the structure of existing electronic current mutual inductor, it is optimized design in primary equipment structure and secondary device structure two end simultaneously, more crucially, introduce high-precision prelum, ultraviolet imager, Partial discharge detector and X-ray production apparatus targetedly and the external and internal compositions of transformer carried out defects detection, thus more rapid, complete transmission and the warning of defective data more accurately.
According to an aspect of the present invention, provide a kind of Intelligent electronic optical pole current transformer, described current transformer includes electronic current mutual inductor main body, Partial discharge detector and ARM chip, described Partial discharge detector is for carrying out defect kind detection to the shell of described electronic current mutual inductor main body, and described ARM chip receives described defect kind testing result and described defect kind testing result is sent to the measurement server place of far-end.
More specifically, in described Intelligent electronic optical pole current transformer, including: electronic current mutual inductor main body, including the first shell, second housing, high voltage bus, air core coil, ironcore choke, signal conditioning circuit, analog to digital conversion circuit, data receiver, data transmitting equipment, electro-optic conversion equipment, downlink optical fiber, primary power source, secondary power supply, uplink optical fibers, photoelectric conversion device, fpga chip, ARM chip, LCD display device and wireless communication interface；First shell, is used for holding high voltage bus, air core coil, ironcore choke, signal conditioning circuit, analog to digital conversion circuit, data receiver, data transmitting equipment, electro-optic conversion equipment and primary power source；Second housing, is used for holding secondary power supply, photoelectric conversion device, fpga chip, ARM chip, LCD display device and wireless communication interface；Prelum, increases the external pressure of preset pressure value, and sends pressurization cue after completing pressurization for the first shell；Partial discharge detector, it is connected with described prelum, for after receiving described pressurization cue, start the feature of the shelf depreciation collection of illustrative plates detecting the first shell in pressure process, determine whether described prelum exists partial discharge phenomenon with the feature according to detection, determine there is partial discharge phenomenon after send and there is Partial discharge signal, put quantitative analysis according to office in partial discharge phenomenon, it is determined that the defect kind of the first shell simultaneously；Ultraviolet imager, is arranged on the opposite of the first shell, for detecting the discharge information of the first shell, to determine the paradoxical discharge position of the first shell；X-ray production apparatus, it is arranged on the opposite of the first shell, it is connected with described ultraviolet imager, for when receiving the paradoxical discharge position of the first shell, shoot to obtain corresponding X-ray digital image to the paradoxical discharge position of the first shell adaptively, and the X-ray digital image obtained is analyzed, to determine the position of the first enclosure existing defects；High voltage bus, through air core coil and ironcore choke；Air core coil, is used as the sensing head of protection passage；Ironcore choke, as the sensing head of Measurement channel；Signal conditioning circuit, the signal of receiving core coil output, process electronic circuit and processing and amplifying electronic circuit including Filtering Processing electronic circuit, phase shift, for the signal of ironcore choke output is sequentially carried out filtering, phase shift and processing and amplifying the signal after output processing；Analog to digital conversion circuit is connected with signal conditioning circuit, for the signal that signal conditioning circuit exports carries out the analog digital conversion of 8；Data receiver, is connected with analog to digital conversion circuit by SPI interface, and the data received are combined and CRC check；Data after verification are sent to electro-optic conversion equipment by SPI interface by data transmitting equipment, and the data after described verification are parallel mode；Data after verification are transmitted by electro-optic conversion equipment by downlink optical fiber；Photoelectric conversion device, receives the data after described verification by uplink optical fibers；Fpga chip, it is achieved receive the data after the verification of multidiameter delay simultaneously, and carry out parallel-serial conversion, to obtain the data after the verification of multi-path serial；ARM chip, it is achieved be connected with the EBI of fpga chip and mount wireless communication interface；It is connected the position of paradoxical discharge position and the first enclosure existing defects receiving the first shell respectively with Partial discharge detector and X-ray production apparatus also by wireless communication interface；Data after the verification of multi-path serial are sent to the measurement server place of far-end by wireless communication interface, and the position of the paradoxical discharge position of the first shell and the first enclosure existing defects is also sent to the measurement server place of far-end；Primary power source, provides supply of electric power for signal conditioning circuit, analog to digital conversion circuit, data receiver, data transmitting equipment and electro-optic conversion equipment；Secondary power supply, provides supply of electric power for photoelectric conversion device, fpga chip, ARM chip, LCD display device and wireless communication interface；LCD display device, is connected with ARM chip, for showing the paradoxical discharge position of the first shell and the position of the first enclosure existing defects in real time, is additionally operable to the data after the verification of real-time display multiway serial；Wherein, the data measuring server place being sent to far-end are proportional to the corresponding data after analog to digital conversion circuit analog digital conversion.
More specifically, in described Intelligent electronic optical pole current transformer: it is embedded with wireless communication unit inside Partial discharge detector.
More specifically, in described Intelligent electronic optical pole current transformer: it is embedded with wireless communication unit inside X-ray production apparatus.
More specifically, in described Intelligent electronic optical pole current transformer: LCD display device is the display resolution of 2K.
More specifically, in described Intelligent electronic optical pole current transformer: fpga chip and ARM chip are integrated on one piece of surface-mounted integrated circuit.
Accompanying drawing explanation
Below with reference to accompanying drawing, embodiment of the present invention are described, wherein:
Fig. 1 is the block diagram of the Intelligent electronic optical pole current transformer of the present invention.
Accompanying drawing labelling: 1 electronic current mutual inductor main body；2 Partial discharge detectors；3ARM chip
Detailed description of the invention
Below with reference to accompanying drawings the embodiment of the Intelligent electronic optical pole current transformer of the present invention is described in detail.
The structure of common transformer is as follows: the structure of ordinary electric current mutual-inductor is relatively simple, is made up of mutually insulated winding, Secondary Winding, iron core and framework, housing, binding post etc..Its operation principle is essentially identical with transformator, the number of turn (N1) of winding is less, directly being series in power circuit, when a load current (I1) is by a winding, the alternating flux sensing of generation produces the secondary current (I2) reduced in proportion；The number of turn (N2) of Secondary Winding is more, connect with the secondary load (Z) of the current coil such as instrument, relay, transmitter formation closed-loop path, owing to winding has equal ampere-turn with Secondary Winding, I1N1=I2N2, in current transformer rated transformation ratio current transformer actual motion, load impedance is only small, Secondary Winding, close to short-circuit condition, is equivalent to the transformator of a short circuit operation.
Electronic mutual inductor, by the voltage of input, current signal are carried out AC sampling, again with digital quantity, sampled value is inputted secondary meter by the transmission system such as cable, optical fiber to be connected, the sampled value of voltage, electric current is carried out computing by digital quantity input secondary meter, it is possible to obtain the parameters such as voltage effective value, current effective value, fundamental voltage, fundamental current, harmonic voltage, harmonic current, active power, fundamental power, harmonic power.
But, electronic mutual inductor of the prior art design is not reasonable, primary equipment structure and secondary device structure remain a need for optimizing, and, existing electronic mutual inductor does not generally configure the detection equipment of internal flaw and External Defect, still rely on artificial timing and carry out defective data extraction and defect kind identification, cause that detection efficiency is low.
For this, the present invention has built a kind of Intelligent electronic optical pole current transformer, on the one hand, optimize the structure of existing electronic mutual inductor, on the other hand, the various defect detection equipments of high accuracy targetedly are integrated on electronic mutual inductor, it is achieved the defect self-inspection of electronic mutual inductor.
Fig. 1 is the block diagram of the Intelligent electronic optical pole current transformer of the present invention, described current transformer includes electronic current mutual inductor main body, Partial discharge detector and ARM chip, described Partial discharge detector is for carrying out defect kind detection to the shell of described electronic current mutual inductor main body, and described ARM chip receives described defect kind testing result and described defect kind testing result is sent to the measurement server place of far-end.
Then, the structure of the Intelligent electronic optical pole current transformer of the present invention is specifically described.
Described current transformer includes: electronic current mutual inductor main body, including the first shell, second housing, high voltage bus, air core coil, ironcore choke, signal conditioning circuit, analog to digital conversion circuit, data receiver, data transmitting equipment, electro-optic conversion equipment, downlink optical fiber, primary power source, secondary power supply, uplink optical fibers, photoelectric conversion device, fpga chip, ARM chip, LCD display device and wireless communication interface；First shell, is used for holding high voltage bus, air core coil, ironcore choke, signal conditioning circuit, analog to digital conversion circuit, data receiver, data transmitting equipment, electro-optic conversion equipment and primary power source；Second housing, is used for holding secondary power supply, photoelectric conversion device, fpga chip, ARM chip, LCD display device and wireless communication interface.
Described current transformer includes: prelum, increases the external pressure of preset pressure value for the first shell, and sends pressurization cue after completing pressurization；Partial discharge detector, it is connected with described prelum, for after receiving described pressurization cue, start the feature of the shelf depreciation collection of illustrative plates detecting the first shell in pressure process, determine whether described prelum exists partial discharge phenomenon with the feature according to detection, determine there is partial discharge phenomenon after send and there is Partial discharge signal, put quantitative analysis according to office in partial discharge phenomenon, it is determined that the defect kind of the first shell simultaneously.
Described current transformer includes: ultraviolet imager, is arranged on the opposite of the first shell, for detecting the discharge information of the first shell, to determine the paradoxical discharge position of the first shell；X-ray production apparatus, it is arranged on the opposite of the first shell, it is connected with described ultraviolet imager, for when receiving the paradoxical discharge position of the first shell, shoot to obtain corresponding X-ray digital image to the paradoxical discharge position of the first shell adaptively, and the X-ray digital image obtained is analyzed, to determine the position of the first enclosure existing defects.
Described current transformer includes: high voltage bus, through air core coil and ironcore choke；Air core coil, is used as the sensing head of protection passage；Ironcore choke, as the sensing head of Measurement channel；Signal conditioning circuit, the signal of receiving core coil output, process electronic circuit and processing and amplifying electronic circuit including Filtering Processing electronic circuit, phase shift, for the signal of ironcore choke output is sequentially carried out filtering, phase shift and processing and amplifying the signal after output processing；Analog to digital conversion circuit is connected with signal conditioning circuit, for the signal that signal conditioning circuit exports carries out the analog digital conversion of 8.
Described current transformer includes: data receiver, is connected with analog to digital conversion circuit by SPI interface, and the data received are combined and CRC check；Data after verification are sent to electro-optic conversion equipment by SPI interface by data transmitting equipment, and the data after described verification are parallel mode；Data after verification are transmitted by electro-optic conversion equipment by downlink optical fiber；Photoelectric conversion device, receives the data after described verification by uplink optical fibers.
Described current transformer includes: fpga chip, it is achieved receives the data after the verification of multidiameter delay simultaneously, and carries out parallel-serial conversion, to obtain the data after the verification of multi-path serial.
Described current transformer includes: ARM chip, it is achieved is connected with the EBI of fpga chip and mounts wireless communication interface；It is connected the position of paradoxical discharge position and the first enclosure existing defects receiving the first shell respectively with Partial discharge detector and X-ray production apparatus also by wireless communication interface.
Described current transformer includes: wireless communication interface, data after the verification of multi-path serial are sent to the measurement server place of far-end, also the position of the paradoxical discharge position of the first shell and the first enclosure existing defects is sent to the measurement server place of far-end.
Described current transformer includes: primary power source, provides supply of electric power for signal conditioning circuit, analog to digital conversion circuit, data receiver, data transmitting equipment and electro-optic conversion equipment；Secondary power supply, provides supply of electric power for photoelectric conversion device, fpga chip, ARM chip, LCD display device and wireless communication interface.
Described current transformer includes: LCD display device, is connected with ARM chip, for showing the paradoxical discharge position of the first shell and the position of the first enclosure existing defects in real time, is additionally operable to the data after the verification of real-time display multiway serial；Wherein, the data measuring server place being sent to far-end are proportional to the corresponding data after analog to digital conversion circuit analog digital conversion.
Alternatively, in described Intelligent electronic optical pole current transformer: be embedded with wireless communication unit inside Partial discharge detector；Wireless communication unit it is embedded with inside X-ray production apparatus；LCD display device is the display resolution of 2K；And, fpga chip can be integrated on one piece of surface-mounted integrated circuit with ARM chip.
It addition, analog-digital converter and A/D converter, or it is called for short ADC, it is common that refer to that analog-signal transitions is the electronic component of digital signal by one.Common analog-digital converter is the digital signal that an input voltage signal is converted to an output.Owing to digital signal itself does not have practical significance, it is merely representative of a relative size.Therefore any one analog-digital converter is required for one with reference to analog quantity as the standard changed, relatively common reference standard is maximum convertible signal magnitude.The digital quantity exported then represents the input signal size relative to reference signal.
The resolution of analog-digital converter refers to, for the analogue signal in allowed band, it can export the number of discrete digital signal value.These signal values store typically by binary number, and therefore resolution is through commonly using bit as unit, and the number of these centrifugal pumps is the power exponent of 2.Such as, analogue signal can be encoded into 256 different centrifugal pumps (because 2^8=256) by one analog-digital converter with 8 bit resolutions, from 0 to 255 (i.e. signless integers) or from-128 to 127 (i.e. signed integers), any as using, then depend on concrete application.
Adopt the Intelligent electronic optical pole current transformer of the present invention, fall behind and cannot realize the technical problem of inside and outside defect self-inspection for electronic current mutual inductor structure in prior art, by transforming primary equipment structure and the secondary device structure of electronic current mutual inductor, improve the product quality of electronic current mutual inductor, more crucially, electronic current mutual inductor is integrated with high-precision inside and outside defect detection equipment, improves accuracy and the real-time of defect kind identification inside and outside electronic current mutual inductor.
Although it is understood that the present invention discloses as above with preferred embodiment, but above-described embodiment is not limited to the present invention.For any those of ordinary skill in the art, without departing under technical solution of the present invention ambit, all may utilize the technology contents of the disclosure above and technical solution of the present invention is made many possible variations and modification, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every content without departing from technical solution of the present invention, the technical spirit of the foundation present invention, to any simple modification made for any of the above embodiments, equivalent variations and modification, all still falls within the scope of technical solution of the present invention protection.
Claims (2)
1. an Intelligent electronic optical pole current transformer, described current transformer includes electronic current mutual inductor main body, Partial discharge detector and ARM chip, described Partial discharge detector is for carrying out defect kind detection to the shell of described electronic current mutual inductor main body, and described ARM chip receives described defect kind testing result and described defect kind testing result is sent to the measurement server place of far-end.
2. Intelligent electronic optical pole current transformer as claimed in claim 1, it is characterised in that described current transformer includes:
Electronic current mutual inductor main body, including the first shell, second housing, high voltage bus, air core coil, ironcore choke, signal conditioning circuit, analog to digital conversion circuit, data receiver, data transmitting equipment, electro-optic conversion equipment, downlink optical fiber, primary power source, secondary power supply, uplink optical fibers, photoelectric conversion device, fpga chip, ARM chip, LCD display device and wireless communication interface；
First shell, is used for holding high voltage bus, air core coil, ironcore choke, signal conditioning circuit, analog to digital conversion circuit, data receiver, data transmitting equipment, electro-optic conversion equipment and primary power source；
Second housing, is used for holding secondary power supply, photoelectric conversion device, fpga chip, ARM chip, LCD display device and wireless communication interface；
Prelum, increases the external pressure of preset pressure value, and sends pressurization cue after completing pressurization for the first shell；
Partial discharge detector, it is connected with described prelum, for after receiving described pressurization cue, start the feature of the shelf depreciation collection of illustrative plates detecting the first shell in pressure process, determine whether described prelum exists partial discharge phenomenon with the feature according to detection, determine there is partial discharge phenomenon after send and there is Partial discharge signal, put quantitative analysis according to office in partial discharge phenomenon, it is determined that the defect kind of the first shell simultaneously；
Ultraviolet imager, is arranged on the opposite of the first shell, for detecting the discharge information of the first shell, to determine the paradoxical discharge position of the first shell；
X-ray production apparatus, it is arranged on the opposite of the first shell, it is connected with described ultraviolet imager, for when receiving the paradoxical discharge position of the first shell, shoot to obtain corresponding X-ray digital image to the paradoxical discharge position of the first shell adaptively, and the X-ray digital image obtained is analyzed, to determine the position of the first enclosure existing defects；
High voltage bus, through air core coil and ironcore choke；
Air core coil, is used as the sensing head of protection passage；
Ironcore choke, as the sensing head of Measurement channel；
Signal conditioning circuit, the signal of receiving core coil output, process electronic circuit and processing and amplifying electronic circuit including Filtering Processing electronic circuit, phase shift, for the signal of ironcore choke output is sequentially carried out filtering, phase shift and processing and amplifying the signal after output processing；
Analog to digital conversion circuit is connected with signal conditioning circuit, for the signal that signal conditioning circuit exports carries out the analog digital conversion of 8；
Data receiver, is connected with analog to digital conversion circuit by SPI interface, and the data received are combined and CRC check；
Data after verification are sent to electro-optic conversion equipment by SPI interface by data transmitting equipment, and the data after described verification are parallel mode；
Data after verification are transmitted by electro-optic conversion equipment by downlink optical fiber；
Photoelectric conversion device, receives the data after described verification by uplink optical fibers；
Fpga chip, it is achieved receive the data after the verification of multidiameter delay simultaneously, and carry out parallel-serial conversion, to obtain the data after the verification of multi-path serial；
ARM chip, it is achieved be connected with the EBI of fpga chip and mount wireless communication interface；It is connected the position of paradoxical discharge position and the first enclosure existing defects receiving the first shell respectively with Partial discharge detector and X-ray production apparatus also by wireless communication interface；
Data after the verification of multi-path serial are sent to the measurement server place of far-end by wireless communication interface, and the position of the paradoxical discharge position of the first shell and the first enclosure existing defects is also sent to the measurement server place of far-end；
Primary power source, provides supply of electric power for signal conditioning circuit, analog to digital conversion circuit, data receiver, data transmitting equipment and electro-optic conversion equipment；
Secondary power supply, provides supply of electric power for photoelectric conversion device, fpga chip, ARM chip, LCD display device and wireless communication interface；
LCD display device, is connected with ARM chip, for showing the paradoxical discharge position of the first shell and the position of the first enclosure existing defects in real time, is additionally operable to the data after the verification of real-time display multiway serial；
Wherein, the data measuring server place being sent to far-end are proportional to the corresponding data after analog to digital conversion circuit analog digital conversion；
Wireless communication unit it is embedded with inside Partial discharge detector；
Wireless communication unit it is embedded with inside X-ray production apparatus.
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| CN201610114488.XA CN105759099A (en) | 2015-11-16 | 2015-11-16 | Intelligent electronic current transformer |
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| CN201610114488.XA CN105759099A (en) | 2015-11-16 | 2015-11-16 | Intelligent electronic current transformer |
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| CN201510782587.0A Division CN105445515B (en) | 2015-11-16 | 2015-11-16 | Intelligent electronic optical pole current transformer |
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| CN105759100A (en) * | 2015-11-16 | 2016-07-13 | 彭冬青 | Intelligent electronic current transformer |
| CN106291038A (en) * | 2016-08-12 | 2017-01-04 | 山东亿玛信诺电气有限公司 | Secondary side current transformer not being afraid of open circuit and preparation method thereof |
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| CN2786758Y (en) * | 2005-04-08 | 2006-06-07 | 南瑞继保电气有限公司 | Hollow core coils current mutual inductor based on digital accumulated scores |
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Application publication date: 20160713 |