CN105470944A - Intelligent and safe phase checking system - Google Patents
Intelligent and safe phase checking system Download PDFInfo
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- CN105470944A CN105470944A CN201510754499.XA CN201510754499A CN105470944A CN 105470944 A CN105470944 A CN 105470944A CN 201510754499 A CN201510754499 A CN 201510754499A CN 105470944 A CN105470944 A CN 105470944A
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- 238000000034 method Methods 0.000 claims abstract description 8
- 230000003321 amplification Effects 0.000 claims description 31
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 31
- 238000000819 phase cycle Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 7
- 125000004122 cyclic group Chemical group 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 7
- 238000005070 sampling Methods 0.000 claims description 7
- 238000012795 verification Methods 0.000 claims description 3
- LXEKPEMOWBOYRF-UHFFFAOYSA-N [2-[(1-azaniumyl-1-imino-2-methylpropan-2-yl)diazenyl]-2-methylpropanimidoyl]azanium;dichloride Chemical compound Cl.Cl.NC(=N)C(C)(C)N=NC(C)(C)C(N)=N LXEKPEMOWBOYRF-UHFFFAOYSA-N 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- H02J3/005—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/40—Synchronising a generator for connection to a network or to another generator
- H02J3/44—Synchronising a generator for connection to a network or to another generator with means for ensuring correct phase sequence
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses an intelligent and safe phase checking system. The nuclear phase system comprises a collection device and a phase checking device. By using the intelligent and safe phase checking system, load switches for phase checking no longer need to be specially installed on line devices, and the simplification of device wiring is realized. The phase checking device is universal and can be widely popularized. The load switches or wireless high-voltage phase checking instruments are capable of carrying out phase checking, but are limited by factors such as environments, fields and low safety due to direct facing to bare charged bodies; and the intelligent phase checking method is applicable to voltage levels from 10 V-50 KV, is not limited by environments, fields, device models and wiring modes, and can be widely used.
Description
Technical field
The present invention relates to nuclear phase field, particularly relate to a kind of kernel phase system of intelligent and safe.
Background technology
When the circuit newly put into operation or two road power supplys are needed to power to same power consumption equipment, must phase place be carried out, phase sequence checks.If phase place or the different AC power of phase sequence are side by side or cyclization, will produce very large electric current, huge electric current can cause the damage of generator or electric equipment, causes short circuit accident, affects electric power system normal power supply.
In real work, nuclear phase carries out when equipment live.Nuclear phase operating personnel need the locking device of releasing equipment; open the protecting sheathing that equipment is closed; phasing tester is directly contacted with electrified body; and then cause nuclear phase operating personnel directly in the face of electrified body; operating personnel are made to lose corresponding protection; bring huge security risk to nuclear phase work, a kind of method therefore finding nuclear phase of intelligent and safe is the task of top priority.
Summary of the invention
In order to overcome above-mentioned deficiency of the prior art, the object of the invention is to, a kind of kernel phase system of intelligent and safe being provided, comprising: harvester and phase checking device;
Described harvester comprises: phase waveform signal acquisition module, wireless sending module;
Described phase checking device comprises: wireless receiving module, signal amplification circuit, microprocessor, memory, display;
Described phase waveform signal acquisition module is for gathering any monophasic waveform signal in three-phase power circuit;
Described wireless sending module is used for the described monophasic waveform signal gathered to be sent to described phase checking device by the mode of radio communication;
The described monophasic waveform signal that described wireless receiving module sends for receiving described wireless sending module;
Described signal amplification circuit is used for the described monophasic waveform signal received to carry out signal amplification;
Described microprocessor is used for the described monophasic waveform signal amplified to draw phase difference, and this phase difference is sent to display display, will show that phase difference is stored in memory simultaneously.
Preferably, described phase checking device also comprises: A/D converter;
Described A/D converter is used for that phase difference is converted into digital data transmission and shows to display.
Preferably, described harvester also comprises: mistake proofing unit;
Described phase checking device also comprises: remove mistake proofing unit;
Described mistake proofing unit, for after adopting cyclic redundancy check (CRC) code to carry out mistake proofing process to the monophasic waveform signal gathered, then to transmit;
The described mistake proofing unit that goes for removing cyclic redundancy check (CRC) code verification, and obtains the monophasic waveform signal of collection.
Preferably, described signal amplification circuit comprises: adjustable amplification quantity circuit, filter circuit;
Described adjustable amplification quantity circuit comprises: the first resistance, the second resistance, the 3rd resistance, the 4th resistance, rheostat, the first amplifier, the second amplifier, the 3rd electric capacity;
Described filter circuit comprises: the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the 3rd amplifier, the first electric capacity, the second electric capacity.
Preferably, described harvester comprises: hand-held insulating end, phase voltage sampling module;
Phase voltage sampling module is for obtaining phase voltage.
Preferably, described harvester comprises at least three phase waveform signal acquisition module.
Preferably, described phase waveform signal acquisition module adopts remote high-voltage nuclear phase instrument, gathers phase sequence, phase angle and phase voltage.
Preferably, described phase waveform signal acquisition module adopts wireless detection device to detect voltage-phase, and wireless detection device adopts induced voltage mode to obtain phase information and the charged information of circuit.
As can be seen from the above technical solutions, the present invention has the following advantages:
Use the kernel phase system of intelligent and safe no longer to need on line facility, specially to install on-load switch to carry out equipment nuclear phase, achieve the simplification of equipment wiring.Generally be suitable for, can large-scale popularization.Although no matter install on-load switch additional or wireless high-pressure phase-check instrument can carry out nuclear phase, but by environment, place and the direct restriction in the face of the exposed not high factor of band point body fail safe, this Intelligent nuclear phase voltage that method is surveyed is all applicable from 10V-500kV electric pressure, by the constraint of environment, place, unit type and the mode of connection, can widely use.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, be briefly described to the accompanying drawing used required in description below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the overall schematic of the kernel phase system of intelligent and safe;
Fig. 2 is the embodiment schematic diagram of the kernel phase system of intelligent and safe;
Fig. 3 is the circuit diagram of signal amplification circuit.
Embodiment
For making goal of the invention of the present invention, feature, advantage can be more obvious and understandable; specific embodiment and accompanying drawing will be used below; the technical scheme of the present invention's protection is clearly and completely described; obviously; the embodiments described below are only the present invention's part embodiments, and the embodiment of not all.Based on the embodiment in this patent, those of ordinary skill in the art are not making other embodiments all obtained under creative work prerequisite, all belong to the scope of this patent protection.
The present embodiment provides a kind of kernel phase system of intelligent and safe, refers to shown in Fig. 1 and Fig. 2, comprising: harvester 1 and phase checking device 2;
Harvester 1 comprises: phase waveform signal acquisition module 11, wireless sending module 12;
Phase checking device 2 comprises: wireless receiving module 14, signal amplification circuit 16, microprocessor 17, memory 18, display 19;
Phase waveform signal acquisition module 11 is for gathering any monophasic waveform signal in three-phase power circuit; Wireless sending module 12 is for being sent to phase checking device 2 by the monophasic waveform signal of collection by the mode of radio communication; The monophasic waveform signal that wireless receiving module 14 sends for receiving wireless sending module 12; Signal amplification circuit 16 is for carrying out signal amplification by the monophasic waveform signal of reception; This phase difference for the monophasic waveform signal of amplification is drawn phase difference, and is sent to display 19 and shows by microprocessor 17, and will show that phase difference is stored in memory 19.
Phase waveform signal acquisition module 11 adopts remote high-voltage nuclear phase instrument, gathers phase sequence, phase angle and phase voltage.Or phase waveform signal acquisition module adopts wireless detection device to detect voltage-phase, wireless detection device adopts induced voltage mode to obtain phase information and is also 50Hz sinusoidal voltage waveform signal and the charged information of circuit.
Use the kernel phase system of intelligent and safe no longer to need on line facility, specially to install on-load switch to carry out equipment nuclear phase, achieve the simplification of equipment wiring.Generally be suitable for, can large-scale popularization.Although no matter install on-load switch additional or wireless high-pressure phase-check instrument can carry out nuclear phase, but by environment, place and the direct restriction in the face of the exposed not high factor of band point body fail safe, this Intelligent nuclear phase voltage that method is surveyed is all applicable from 10V-500kV electric pressure, by the constraint of environment, place, unit type and the mode of connection, can widely use.
Greatly improve the fail safe of nuclear phase work, especially on the equipment not installing on-load switch, carry out nuclear phase work, need first by the locking compulsory commutation of Devices to test, only this bit just violates electric power safety code, belongs to operation against rules.The protecting sheathing of positive opening equipment, cabinet door, operating personnel are directly in the face of exposed charging equipment, and site safety is difficult to ensure.The kernel phase system of intelligent and safe is adopted to carry out nuclear phase, adopt remote collection, radio transceiver data-signal, do not need remove charged device latchup and open cabinet door, display display phase sequence directly in contact or section gap and phase place, the fail safe at nuclear phase scene is improved greatly and is strengthened.Realize detection, at any time nuclear phase constantly.It is only harvester 1 and phase checking device 2 that hardware drops into, and reduces cost compared with on-load switch and drops into installing additional, thus improve economy.Reduce operating personnel to drop into.Most of phasing testers that present stage is using are all operated by two people, and the kernel phase system of intelligent and safe only needs one man operation, the data of observed and recorded display.
Can harvester be arranged in high voltage power distributing cabinet, by radio communication, image data be spread out of constantly in phase checking device 2.And do not need to have a power failure, open the operating procedures such as cabinet door.Improve fail safe, bringing great convenience property.
Harvester 1 comprises: hand-held insulating end, phase voltage sampling module; Phase voltage sampling module is for obtaining first-phase voltage.Harvester 1 near high-tension switch cabinet 30-80cm place, or is directly placed into distance high-voltage switch cubicle 30-80cm place by the hand-held insulating end of operating personnel.Phase voltage sampling module is for obtaining phase voltage, and phase waveform signal acquisition module 11 gathers first-phase waveform signal in three-phase power circuit; First-phase waveform signal is sent to phase checking device 2 by the mode of radio communication by wireless sending module 12; Wireless receiving module 14 receives first-phase waveform signal; The first-phase waveform signal of reception is carried out signal amplification by signal amplification circuit 16; The first-phase waveform signal of amplification is drawn phase difference by microprocessor 17, and this phase difference is sent to display 19 shows, and will show that phase difference is stored in memory 19.
Phase waveform signal acquisition module 11 gathers second-phase waveform signal in three-phase power circuit; Second-phase waveform signal is sent to phase checking device 2 by the mode of radio communication by wireless sending module 12; Wireless receiving module 14 receives second-phase waveform signal; The second-phase waveform signal of reception is carried out signal amplification by signal amplification circuit 16; The second-phase waveform signal of amplification is drawn phase difference by microprocessor 17, and this phase difference is sent to display 19 shows, and will show that phase difference is stored in memory 19.
Phase waveform signal acquisition module 11 gathers third phase waveform signal in three-phase power circuit; Third phase waveform signal is sent to phase checking device 2 by the mode of radio communication by wireless sending module 12; Wireless receiving module 14 receives third phase waveform signal; The third phase waveform signal of reception is carried out signal amplification by signal amplification circuit 16; The third phase waveform signal of amplification is drawn phase difference by microprocessor 17, and this phase difference is sent to display 19 shows, and will show that phase difference is stored in memory 19.Microprocessor 17 goes out A, B, C phase according to the phase difference be stored in memory 19.
Detect that each phase circuit has no-voltage like this, check whether circuit is energized, obtain phase place, the phase sequence of every bar circuit, and automatically by secondary line by the phase sequence of each bar circuit, transmission of phase on the microcontroller of contact interval or section gap, microcontroller receive phase sequence, phase information and with compared with, finally show result on a display screen: " homophase " or " out-phase " and phase angle are 0 ° with phase sequence, reverse sequence is 120 °, 240 °.
Harvester comprises at least three phase waveform signal acquisition module.Three phase waveform signal acquisition module are gathered mutually and obtains phase waveform signal, comparing.
In the present embodiment, phase checking device 2 also comprises: A/D converter 19; A/D converter 19 shows to display 20 for phase difference being converted into digital data transmission.
Harvester also comprises: mistake proofing unit; Phase checking device also comprises: remove mistake proofing unit; Mistake proofing unit, for after adopting cyclic redundancy check (CRC) code to carry out mistake proofing process to the monophasic waveform signal gathered, then to transmit; Go mistake proofing unit for removing cyclic redundancy check (CRC) code verification, and obtain the monophasic waveform signal of collection.Adopt cyclic redundancy check (CRC) code can reduce the error rate of transmission, improve the accuracy of transmission.
In the present embodiment, signal amplification circuit 16 comprises: adjustable amplification quantity circuit 21, filter circuit 22;
Adjustable amplification quantity circuit 21 adopts dual-stage amplifier cascade.The first order is selected high precision operating amplifier and is had the amplifier of adjustable amplification degree, the second level is formed primarily of amplifier, signal secondary amplifies, in order to reduce other signal disturbing, at the second level adjunction of amplifier amplifier C3, R4 as filter circuit, C3 capacity is 1 μ F, in order to filtering clutter, makes output signal more steady.
Filter circuit 22 has differential type structure, has very strong inhibitory action to common-mode noise, can filtering gatherer process, the clutter of system in wireless transmission process, and disturbing wave.
Concrete, adjustable amplification quantity circuit 21 comprises: the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, rheostat R5, the first amplifier A1, the second amplifier A1, the 3rd electric capacity C3;
Filter circuit 22 comprises: the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the 3rd amplifier A3, the first electric capacity C1, the second electric capacity C2.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, identical similar portion reference mutually between each embodiment.
Term " first ", " second ", " the 3rd " " 4th " etc. (if existence) in specification of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, and intention is to cover not exclusive comprising.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a kernel phase system for intelligent and safe, is characterized in that, comprising: harvester and phase checking device;
Described harvester comprises: phase waveform signal acquisition module, wireless sending module;
Described phase checking device comprises: wireless receiving module, signal amplification circuit, microprocessor, memory, display;
Described phase waveform signal acquisition module is for gathering any monophasic waveform signal in three-phase power circuit;
Described wireless sending module is used for the described monophasic waveform signal gathered to be sent to described phase checking device by the mode of radio communication;
The described monophasic waveform signal that described wireless receiving module sends for receiving described wireless sending module;
Described signal amplification circuit is used for the described monophasic waveform signal received to carry out signal amplification;
Described microprocessor is used for the described monophasic waveform signal amplified to draw phase difference, and this phase difference is sent to display display, will show that phase difference is stored in memory simultaneously.
2. the kernel phase system of intelligent and safe according to claim 1, is characterized in that,
Described phase checking device also comprises: A/D converter;
Described A/D converter is used for that phase difference is converted into digital data transmission and shows to display.
3. the kernel phase system of intelligent and safe according to claim 1, is characterized in that,
Described harvester also comprises: mistake proofing unit;
Described phase checking device also comprises: remove mistake proofing unit;
Described mistake proofing unit, for after adopting cyclic redundancy check (CRC) code to carry out mistake proofing process to the monophasic waveform signal gathered, then to transmit;
The described mistake proofing unit that goes for removing cyclic redundancy check (CRC) code verification, and obtains the monophasic waveform signal of collection.
4. the kernel phase system of intelligent and safe according to claim 1, is characterized in that,
Described signal amplification circuit comprises: adjustable amplification quantity circuit, filter circuit;
Described adjustable amplification quantity circuit comprises: the first resistance, the second resistance, the 3rd resistance, the 4th resistance, rheostat, the first amplifier, the second amplifier, the 3rd electric capacity;
Described filter circuit comprises: the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the 3rd amplifier, the first electric capacity, the second electric capacity.
5. the kernel phase system of intelligent and safe according to claim 1, is characterized in that,
Described harvester comprises: hand-held insulating end, phase voltage sampling module;
Phase voltage sampling module is for obtaining phase voltage.
6. the kernel phase system of intelligent and safe according to claim 1, is characterized in that,
Described harvester comprises at least three phase waveform signal acquisition module.
7. the kernel phase system of intelligent and safe according to claim 1, is characterized in that,
Described phase waveform signal acquisition module adopts remote high-voltage nuclear phase instrument, gathers phase sequence, phase angle and phase voltage.
8. the kernel phase system of intelligent and safe according to claim 1, is characterized in that,
Described phase waveform signal acquisition module adopts wireless detection device to detect voltage-phase, and wireless detection device adopts induced voltage mode to obtain phase information and the charged information of circuit.
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| CN201510754499.XA CN105470944A (en) | 2015-11-09 | 2015-11-09 | Intelligent and safe phase checking system |
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| CN201510754499.XA CN105470944A (en) | 2015-11-09 | 2015-11-09 | Intelligent and safe phase checking system |
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| CN105470944A true CN105470944A (en) | 2016-04-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535554A (en) * | 2018-03-26 | 2018-09-14 | 福州大学 | Novel non-contact nuclear phase detection method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05172887A (en) * | 1991-12-19 | 1993-07-13 | San'eisha Mfg Co Ltd | Radio type phase detector |
| CN1737583A (en) * | 2005-07-27 | 2006-02-22 | 江苏省电力公司常州供电公司 | Indoor looped network cabinet intelligent nuclear phase method |
| CN101799498A (en) * | 2009-12-28 | 2010-08-11 | 江苏省电力公司苏州供电公司 | High-pressure phase sequence phasemeter and detection method thereof |
| CN202486218U (en) * | 2011-12-06 | 2012-10-10 | 华北电力大学 | Wireless nuclear phase device of high-voltage line |
| CN202583332U (en) * | 2011-12-21 | 2012-12-05 | 上海东润供电实业有限公司 | Portable AC high voltage one pole type wireless nuclear phase device |
| CN103630764A (en) * | 2013-12-04 | 2014-03-12 | 国家电网公司 | Multi-application wireless phase detector unit |
-
2015
- 2015-11-09 CN CN201510754499.XA patent/CN105470944A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05172887A (en) * | 1991-12-19 | 1993-07-13 | San'eisha Mfg Co Ltd | Radio type phase detector |
| CN1737583A (en) * | 2005-07-27 | 2006-02-22 | 江苏省电力公司常州供电公司 | Indoor looped network cabinet intelligent nuclear phase method |
| CN101799498A (en) * | 2009-12-28 | 2010-08-11 | 江苏省电力公司苏州供电公司 | High-pressure phase sequence phasemeter and detection method thereof |
| CN202486218U (en) * | 2011-12-06 | 2012-10-10 | 华北电力大学 | Wireless nuclear phase device of high-voltage line |
| CN202583332U (en) * | 2011-12-21 | 2012-12-05 | 上海东润供电实业有限公司 | Portable AC high voltage one pole type wireless nuclear phase device |
| CN103630764A (en) * | 2013-12-04 | 2014-03-12 | 国家电网公司 | Multi-application wireless phase detector unit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535554A (en) * | 2018-03-26 | 2018-09-14 | 福州大学 | Novel non-contact nuclear phase detection method |
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Application publication date: 20160406 |