CN104569532A - Collecting-combining-integrated device of electronic transformer - Google Patents
Collecting-combining-integrated device of electronic transformer Download PDFInfo
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- CN104569532A CN104569532A CN201510047516.6A CN201510047516A CN104569532A CN 104569532 A CN104569532 A CN 104569532A CN 201510047516 A CN201510047516 A CN 201510047516A CN 104569532 A CN104569532 A CN 104569532A
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Abstract
The invention provides a collecting-combining-integrated device of an electronic transformer. The collecting-combining-integrated device comprises a signal collecting module, a data isolation module, a data processing module, an isolation output module, a first DC/DC transformation module and a second DC/DC transformation module. The signal collecting module, the data isolation module, the data processing module and the isolation output module are sequentially connected. The signal collecting module is connected with a bus through the first DC/DC transformation module. The data processing module is connected with the bus through the second DC/DC transformation module. The collecting-combining-integrated device has the advantages that integration level of grid distribution equipment is increased, communication connecting lines in a cabinet are simplified, number of communication optical fibers is reduced by at least half, and an independent collecting power supply needs not to be added; intelligent equipment manufacturing cost is lowered, and popularization and application are benefited; the application standard of the electronic transformer for grid distribution is innovated by popularizing and applying the collecting-combining-integrated device; due to the fact that the plug-in structure is used, maintenance and replacement are quite conveniently, hot-line operation is achieved, and power failure time is reduced or shortened.
Description
Technical field
The invention belongs to intelligent electric appliance technical field, be specifically related to a kind of electronic mutual inductor collection and merge integrated apparatus.
Background technology
Current intelligent grid construction has risen to national height, and intelligent substation is then important foundation and the support of intelligent grid construction.Intelligent substation major advantage is embodied in the following aspects: process device digitizing, has introduced the new equipment such as electronic mutual inductor, merge cells intelligent terminal; Information transmission network, is mainly IEC 61850 agreement and the network communications technology.This means that the information interaction between Substation process-level equipment and bay device there occurs very large change.Along with the fast development of digital transformer substation, electronic mutual inductor, because which overcoming the advantage of the problems such as the insulation of conventional electromagnetic mutual inductor and magnetic saturation, occupies critical role in digital transformer substation construction.
At home, current electronic mutual inductor is in power plant application, the electric current at a usual interval, voltage transformer (VT) (6), subsidiary 6 Acquisition Circuit, output digit signals, through merging communication unit, 6 tunnel information are merged into network message to protection again, metering and other secondary device transmission, in 10kV application to distribution network, electric mutual inductor and combiner, protection, measuring apparatus is all contained in same cabinet, only within the scope of several meters, for the electron device of digital processing, communication grafting, power configuration repeats in a large number, not only increase construction cost, the difficulty adding construction simultaneously and safeguard, increase probability of makeing mistakes.
10kV electronic current of the prior art, voltage transformer (VT) are applied, and still adopt monomer independent acquisition, the way of additional merging communication unit, link is many, and cost is high, is difficult to apply.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of electronic mutual inductor collection and merging integrated apparatus, realizing pooling function, significantly simplifying and gather and the configuration that communicates, reducing cost, improving integrated level and intelligent level.
In order to realize foregoing invention object, the present invention takes following technical scheme:
The invention provides a kind of electronic mutual inductor collection and merge integrated apparatus, described electronic mutual inductor is air core coil combined instrument transformer, and described device comprises signal acquisition module, data isolation module, data processing module, isolation and amplifier module, a DC/DC conversion module and the 2nd DC/DC conversion module; Described signal acquisition module, data isolation module, data processing module, isolation and amplifier module connect successively, described signal acquisition module is by a DC/DC conversion module connection bus, and described data processing module is by the 2nd DC/DC conversion module connection bus.
Described signal acquisition module comprises amplification module, filtration module, conditioning module and A/D modular converter; The electric signal that electronic mutual inductor exports is undertaken amplifying by amplification module, filtration module and conditioning module successively, after filtering and conditioning, then to be changed by A/D modular converter.
The electric signal that electronic mutual inductor exports comprises the voltage signal of voltage sensor output and the current signal of current sensor output.
Described A/D modular converter is 16 road A/D modular converters; Described 16 road A/D modular converters comprise input clamped protection module, input buffer, the anti-aliasing analog filter of second order and digital filter.
Electric signal after conditioning module conditioning completes the conversion of electric signal to digital signal by input clamped protection module, input buffer, the anti-aliasing analog filter of second order and digital filter.
Described database isolation module comprises the first photoelectrical coupler, is realized the isolation of signal acquisition module and data processing module by the first photoelectrical coupler.
Described data isolation module and all adopt SPI protocol to carry out communication between signal acquisition module and data processing module.
Described data processing module mainly comprises FPGA module; Described FPGA module carries out IIR filtering, demarcation, CRC check and packing process to the digital signal obtained through A/D modular converter, exports to isolation and amplifier module according to UART agreement.
Described isolation and amplifier module comprises the second photoelectrical coupler, is realized the isolation of data processing module and bus by the second photoelectrical coupler.
A described DC/DC conversion module provides ± 12V power supply for Signal-regulated kinase and 16 road A/D modular converters; Described 2nd DC/DC conversion module provides+5V power supply for data processing module ,+5V power supply after voltage stabilizing conditioning, for FPGA module provides 3.3V and 1.2V power supply.
Compared with prior art, beneficial effect of the present invention is:
Invention increases the integrated level of distribution net equipment, simplify communication connection in cabinet, the quantity of communication optical fiber is reduced over half, no longer increase independent collection power supply; Have compressed smart machine manufacturing cost, be beneficial to and apply; Applying by this invention, has innovated the using standard of distribution electronic mutual inductor; Owing to have employed dongle configuration, make maintenance, change very convenient, even can operate when charged, reduce or shorten power off time.
Accompanying drawing explanation
Fig. 1 is that in the embodiment of the present invention, electronic mutual inductor collection merges integrated apparatus structural drawing.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
" New Generation of Intelligent electrical reticulation design specification " that national grid proposes: advocate to carry out: Top-layer Design Method, Deep integrating, function merges, the new concept of standard normalizing, " container-type power station " concept is proposed, one secondary device is done significantly, combine with integrated profoundly, change " intelligent electrical apparatus " theory into " intelligent primary equipment ", this Deep integrating technology path is pressed in the design of intelligent station and is had broad application prospects in 35-10kV of new generation, the present invention has fully deferred to these principles (as Fig. 1), a kind of electronic mutual inductor collection is provided to merge integrated apparatus, described electronic mutual inductor is air core coil combined instrument transformer, described device comprises signal acquisition module, data isolation module, data processing module, isolation and amplifier module, one DC/DC conversion module and the 2nd DC/DC conversion module, described signal acquisition module, data isolation module, data processing module, isolation and amplifier module connect successively, described signal acquisition module is by a DC/DC conversion module connection bus, and described data processing module is by the 2nd DC/DC conversion module connection bus.
Described signal acquisition module comprises amplification module, filtration module, conditioning module and A/D modular converter; The electric signal that electronic mutual inductor exports is undertaken amplifying by amplification module, filtration module and conditioning module successively, after filtering and conditioning, then to be changed by A/D modular converter.
The electric signal that electronic mutual inductor exports comprises the voltage signal of voltage sensor output and the current signal of current sensor output.
Described A/D modular converter is 16 road A/D modular converters; Described 16 road A/D modular converters comprise input clamped protection module, input buffer, the anti-aliasing analog filter of second order and digital filter.
Electric signal after conditioning module conditioning completes the conversion of electric signal to digital signal by input clamped protection module, input buffer, the anti-aliasing analog filter of second order and digital filter.
Described database isolation module comprises the first photoelectrical coupler, is realized the isolation of signal acquisition module and data processing module by the first photoelectrical coupler.
Described data isolation module and all adopt SPI protocol to carry out communication between signal acquisition module and data processing module.
Described data processing module mainly comprises FPGA module; Described FPGA module carries out IIR filtering, demarcation, CRC check and packing process to the digital signal obtained through A/D modular converter, exports to isolation and amplifier module according to UART agreement.
CRC (Cyclic Redundancy Check) i.e. cyclic redundancy check (CRC) code is a kind of error check code the most frequently used in data communication field, it is characterized in that the length of information field and check field can be selected arbitrarily; Cyclical Redundancy Check is a kind of data transmission error-detecting function, and carry out polynomial computation to data, and be attached to after frame by the result obtained, receiving equipment also performs similar algorithm, to ensure the correctness that data are transmitted and integrality.
Described isolation and amplifier module comprises the second photoelectrical coupler, is realized the isolation of data processing module and bus by the second photoelectrical coupler.
A described DC/DC conversion module provides ± 12V power supply for Signal-regulated kinase and 16 road A/D modular converters; Described 2nd DC/DC conversion module provides+5V power supply for data processing module ,+5V power supply after voltage stabilizing conditioning, for FPGA module provides 3.3V and 1.2V power supply.
The present invention has following characteristics:
1) output of 3 phase voltages, 3 phase current sensors is combined on a collection plate, forms collection, merge integrated apparatus;
2) collection and pooling function are integrated on one piece of PCB, make plug-in unit and be directly inserted on the bus of protective device, decrease a large amount of repetitions of the devices such as digital processing, communication, power supply; Save cost; Decrease probability of makeing mistakes;
3) have employed high-speed data isolating device and isolation DC/DC power supply, isolation voltage 6000V, has isolated the interference of primary line dataway operation to secondary acquisition, merging, protective device effectively;
4) gathering merging integrated apparatus is arranged in a metal box, and input end is 3 aviation plugs, and output terminal is 120 plugs, is directly plugged on the bus of protective device;
5) gather the output merging integrated apparatus and adopt standard industry UART agreement, each byte forms by 11,1 start bit " 0 ", 8 data bit, 1 even parity bit, 1 position of rest " 1 ".Transfer rate 4M/S, sampling rate is 4K/S, and Manchester's cde exports.Data transmission frames form is as table 1:
Table 1
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; those of ordinary skill in the field still can modify to the specific embodiment of the present invention with reference to above-described embodiment or equivalent replacement; these do not depart from any amendment of spirit and scope of the invention or equivalent replacement, are all applying within the claims of the present invention awaited the reply.
Claims (10)
1. an electronic mutual inductor collection merges integrated apparatus, it is characterized in that: described electronic mutual inductor is air core coil combined instrument transformer, described device comprises signal acquisition module, data isolation module, data processing module, isolation and amplifier module, a DC/DC conversion module and the 2nd DC/DC conversion module; Described signal acquisition module, data isolation module, data processing module, isolation and amplifier module connect successively, described signal acquisition module is by a DC/DC conversion module connection bus, and described data processing module is by the 2nd DC/DC conversion module connection bus.
2. electronic mutual inductor collection according to claim 1 merges integrated apparatus, it is characterized in that: described signal acquisition module comprises amplification module, filtration module, conditioning module and A/D modular converter; The electric signal that electronic mutual inductor exports is undertaken amplifying by amplification module, filtration module and conditioning module successively, after filtering and conditioning, then to be changed by A/D modular converter.
3. electronic mutual inductor collection according to claim 2 merges integrated apparatus, it is characterized in that: the electric signal that electronic mutual inductor exports comprises the voltage signal of voltage sensor output and the current signal of current sensor output.
4. electronic mutual inductor collection according to claim 2 merges integrated apparatus, it is characterized in that: described A/D modular converter is 16 road A/D modular converters; Described 16 road A/D modular converters comprise input clamped protection module, input buffer, the anti-aliasing analog filter of second order and digital filter.
5. electronic mutual inductor collection according to claim 4 merges integrated apparatus, it is characterized in that: the electric signal after conditioning module conditioning completes the conversion of electric signal to digital signal by input clamped protection module, input buffer, the anti-aliasing analog filter of second order and digital filter.
6. electronic mutual inductor collection according to claim 1 merges integrated apparatus, it is characterized in that: described database isolation module comprises the first photoelectrical coupler, is realized the isolation of signal acquisition module and data processing module by the first photoelectrical coupler.
7. electronic mutual inductor collection according to claim 1 or 6 merges integrated apparatus, it is characterized in that: described data isolation module and all adopt SPI protocol to carry out communication between signal acquisition module and data processing module.
8. electronic mutual inductor collection according to claim 1 merges integrated apparatus, it is characterized in that: described data processing module mainly comprises FPGA module; Described FPGA module carries out IIR filtering, demarcation, CRC check and packing process to the digital signal obtained through A/D modular converter, exports to isolation and amplifier module according to UART agreement.
9. electronic mutual inductor collection according to claim 1 merges integrated apparatus, it is characterized in that: described isolation and amplifier module comprises the second photoelectrical coupler, is realized the isolation of data processing module and bus by the second photoelectrical coupler.
10. electronic mutual inductor collection according to claim 1 merges integrated apparatus, it is characterized in that: a described DC/DC conversion module provides ± 12V power supply for Signal-regulated kinase and 16 road A/D modular converters; Described 2nd DC/DC conversion module provides+5V power supply for data processing module ,+5V power supply after voltage stabilizing conditioning, for FPGA module provides 3.3V and 1.2V power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510047516.6A CN104569532A (en) | 2015-01-29 | 2015-01-29 | Collecting-combining-integrated device of electronic transformer |
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| CN201510047516.6A CN104569532A (en) | 2015-01-29 | 2015-01-29 | Collecting-combining-integrated device of electronic transformer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067860A (en) * | 2015-07-22 | 2015-11-18 | 许继集团有限公司 | Electronic mutual inductor |
| CN107167757A (en) * | 2017-07-10 | 2017-09-15 | 国网天津市电力公司电力科学研究院 | A kind of method for checking electronic transducer and system using improvement digital filtering algorithm |
| CN113899975A (en) * | 2021-10-21 | 2022-01-07 | 贵州电网有限责任公司 | A collection controlling means and intelligent substation for smart power grids |
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| CN202486199U (en) * | 2012-03-22 | 2012-10-10 | 淄博职业学院 | Data acquisition unit of electronic type mutual inductor |
| CN203085344U (en) * | 2012-07-12 | 2013-07-24 | 广州智天电子科技有限公司 | Integrated digital current transformer |
| CN103323641A (en) * | 2013-05-27 | 2013-09-25 | 河南省电力公司鹤壁供电公司 | Electronic transformer and implementation method thereof |
| CN203561689U (en) * | 2013-11-14 | 2014-04-23 | 成都亿友科技有限公司 | Data acquisition system of electronic type current transformer |
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2015
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Patent Citations (6)
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| CN201436638U (en) * | 2009-05-27 | 2010-04-07 | 辽宁省电力有限公司鞍山供电公司 | Digital electric energy metering device for conventional transformer station |
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Cited By (3)
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| CN105067860A (en) * | 2015-07-22 | 2015-11-18 | 许继集团有限公司 | Electronic mutual inductor |
| CN107167757A (en) * | 2017-07-10 | 2017-09-15 | 国网天津市电力公司电力科学研究院 | A kind of method for checking electronic transducer and system using improvement digital filtering algorithm |
| CN113899975A (en) * | 2021-10-21 | 2022-01-07 | 贵州电网有限责任公司 | A collection controlling means and intelligent substation for smart power grids |
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Application publication date: 20150429 |