CN104316746A - Smart measurement and computational analysis method of PT secondary circuit voltage and pressure drop - Google Patents
Smart measurement and computational analysis method of PT secondary circuit voltage and pressure drop Download PDFInfo
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- CN104316746A CN104316746A CN201410543049.1A CN201410543049A CN104316746A CN 104316746 A CN104316746 A CN 104316746A CN 201410543049 A CN201410543049 A CN 201410543049A CN 104316746 A CN104316746 A CN 104316746A
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Abstract
The invention discloses a smart measurement and computational analysis method of PT secondary circuit voltage and pressure drop. The smart measurement and computational analysis method includes that two voltage measuring instruments are adopted, and each voltage measuring instrument is connected with a background computer through a wireless network; one voltage measuring instrument is connected with the head end of a PT secondary circuit, the other voltage measuring instrument is connected with the tail end of the PT secondary circuit, and the two voltage measuring instruments conduct measurement simultaneously as set; the two voltage measuring instruments store the simultaneously measured data and transmit the data to the background computer in a wireless way. According to the smart measurement and computational analysis method, each measurement point can conduct automatic continuous measurement and can automatically track and measure fluctuant PT secondary head end voltage and tail end voltage on the condition of complex and variable measurement environment, measurement data of a large number of multiple load points can be obtained automatically, analysis data can be increased greatly, reliability of the measurement and analysis results is obviously improved, the voltage drop result of the PT secondary circuit can be calculated smartly, and the state can be analyzed smartly.
Description
Technical field
The present invention relates to the electric parameter measurement of electric system, the method for the intelligent measure computational analysis of particularly a kind of PT secondary circuit voltage and pressure drop.
Background technology
DL/T448 ?define the allowed band of all kinds of electric power meter PT secondary circuit voltage drop in 2000 " electric energy measuring management technical management codes ".The special PT secondary circuit voltage drop measuring instrument of domestic production adopts error of measurement method directly to measure or indirect host and slave processors mensuration mostly.
When directly measuring by error of measurement method, staff holds work ticket and carries out surveying work to substation field.Following problem is there is: (1) is manually difficult to continuous coverage, and measurement data is few in actual measurement operation, less for the data analyzed, inefficiency.(2) the stranded shielded cable limited length of measuring instrument, and stranded shielded cable and measuring instrument form overall measurement mechanism, form specific systematic error, working site is difficult to increase length of cable.What exceed measuring instrument standard configuration length of cable to on-the-spot PT secondary circuit length separately must do cable, time-consumingly takes a lot of work.(3), there is personal security and cable breakdown potential problem in the artificial stranded shielded cable of folding and unfolding at the scene of each measurement.(4) stranded shielded cable must carry out Insulation test before each measurement point measures wiring at every turn.(5) measure at every turn, be greatly less than the time of field wiring, stranded shielded cable retractable cable, stranded shielded cable Insulation test, defect elimination for measuring the time obtaining data.(6) major part provides data computing function, needs manually to carry out data analysis.
Hold work ticket with staff during indirect host and slave processors mensuration measurement and carry out surveying work to substation field.Method 2 solves (2) (3) (4) (5) (6) problem directly measured by error of measurement method, but still exist in actual measurement operation and be manually difficult to continuous coverage, measurement data is few, less for the data analyzed, work efficiency is not high but bring new problem simultaneously: (1) radio communication scene is easily disturbed, and staff must find the wireless aerial position that can ensure communication in scene repeatedly; Host and slave processors GPS scene must trace into communications satellite respectively and can measure.(2) equipment must host and slave processors configuration, main frame as measuring, the measurement of breaking down of the core of data processing cannot complete, equipment guarantee is not high; (3) because host and slave processors is supporting, equipment repeats to purchase.
Summary of the invention
Goal of the invention: technical matters to be solved by this invention is for the deficiencies in the prior art, provides the method for the intelligent measure computational analysis of a kind of PT secondary circuit voltage and pressure drop, and electric energy metrical Related Work personnel are overcome the above problems effectively.
In order to solve the problems of the technologies described above, the invention discloses the method for the intelligent measure computational analysis of a kind of PT secondary circuit voltage and pressure drop, adopt two pressure measuring instruments, every platform pressure measuring instrument connects background computer by wireless network; Wherein a pressure measuring instrument connects PT secondary circuit head end, and another pressure measuring instrument connects PT secondary circuit end, and measures by setting simultaneously; Two pressure measuring instruments are preserved and are measured the data obtained simultaneously.
In the present invention, the precision of described two pressure measuring instruments is not less than 0.1%.
In the present invention, described two pressure measuring instruments comprise the clock (should cancel) of GPS calibration or electric wave calibration
In the present invention, described two pressure measuring instruments adopt GPRS (CDMA) or 3G or 4G network and background computer to carry out Wireless Data Transmission.Data computational analysis is carried out by background computer.
In the present invention, described two pressure measuring instruments start simultaneously or terminate to measure.
In the present invention, described two pressure measuring instrument Automatic continuous are measured.
In the present invention, background computer can process the pressure measuring instrument measurement data that multiple stage has measurement relation simultaneously.
Any two pressure measuring instruments setting measurement relation when surveying work starts, two pressure measuring instruments measured at the scene are without the need to fixing especially.
Compare with existing measuring technique, the inventive method has following advantage:
1, the intelligent measuring systems of the inventive method, each measurement point can be measured by Automatic continuous, measurement environment complicated condition changeable lower can automatic tracing and measuring with PT bis-head end voltages of voltage ripple of power network and terminal voltage, the measurement data of the multi-loading point that automatic acquisition is a large amount of, increase considerably analysis data, Measurement and analysis result reliability obviously increases, and intelligent computation is analyzed PT secondary circuit voltage and fallen result phase.
2, voltage automatic measurement instrument volume is little, is easy to carry.Carry multiple stage measuring instrument to carry out loop, many, a scene and measure simultaneously, field wiring is simple, and staff's work on the spot efficiency significantly improves, and working strength alleviates, and security level improves.
3, measurement data is stored in automatic measuring instrument, and data transmission, without place time restriction, is very easy to work on the spot; A distant place background system normally can carry out data processing to thousands of measurement point, ultrahigh in efficiency simultaneously.
4, surveying work is simple and convenient, and measurement result is analyzed a distant place (or the notebook PC carried) intelligence and generated, and measuring system has intelligent functions.
5, voltage automatic measurement instrument can exchange use, and the protection of equipment increases substantially.Small investment, measuring system small investment, safeguard easy to use.
6, be convenient to promote, social benefit is good, high financial profit, saves a large amount of PT secondary circuits and measures resource.
Accompanying drawing explanation
To do the present invention below in conjunction with the drawings and specific embodiments and further illustrate, above-mentioned and/or otherwise advantage of the present invention will become apparent.
Fig. 1 is the inventive method schematic diagram.
Embodiment
As shown in Figure 1, the inventive method is not less than 0.1% by 2 precision, the voltage automatic measurement instrument (hereinafter referred to as pressure measuring instrument) of band gps clock and GPRS communication module and backstage (or computing machine) form voltage (voltage drop) and measure intelligent system, measuring instrument is attached thereto near the terminal box (box) of PT secondary circuit head end and end on the spot, automatically carry out voltage vector measurement by setting simultaneously, start surveying work, automatically terminate surveying work.The large amount measurement data (can reach thousands digit) that each measurement point obtains is stored in pressure measuring instrument.Data by setting can on-the-spot (or non-at-scene) by GPRS in time (or timing) wireless transmission afield backstage or measure terminate after read by computing machine the treatment and analyses carrying out data, to be fallen with the direct calculating voltage of head end voltage vector by terminal voltage vector, ratio, angular difference automatically provide analysis result and chart.A background system normally can carry out data processing to thousands of measurement point, ultrahigh in efficiency simultaneously.
Embodiment
Present embodiment discloses the method for the intelligent measure computational analysis of a kind of PT secondary circuit voltage and pressure drop, comprise two voltage automatic measurement instrument and background system (or computing machine).
One, voltage automatic measurement instrument
1, realize phase three-wire three, three-phase and four-line, single-phase full-automatic voltage measurement, ensure that measuring accuracy is not less than 0.1%.
2, tester uses engineering plastics (or cast aluminium) shell tape insulation fixed support, is convenient to the inside and outside placement in family and uses, effective guarantee tester and security of system.
3, adopt electronic type scheme circuit, DSP technology, gps clock technology, GPRS (CDMA) mechanics of communication to make measuring stability good, synchronously accurate during different meter pair, antijamming capability is strong, voltage data and measuring instrument operating mode remote transmission.4, automatically measure and store every band markers measurement data, storing and be not less than 30 measurement points, 24 hours one group of measurement data per minute, after power-off, can 3 months be kept.
5, adopt giant-screen Chinese character LCD, all operations is pointed out by menu Chinese character; Data possess power down storage and function of browse.The period can be uploaded by setting data in measuring process, measure and terminate to read data by GPRS (or setting the period in measuring process) to system transfers data or computing machine, be with 2 groups of RS232/RS485 communication interfaces.
6, adopt Large Copacity 7.2V11Ah lithium battery to make working power, external 220V charging converter is powered, and does not produce any impact to the PT secondary circuit of measuring instrument test, avoids system to occur the situation of protection.Measuring instrument can use without when power supply at the scene.
7, minimum interval one group per minute (exceed and can set) measurement data, stream time is no more than 24 hours.
8, join the stranded shielded cable of 2.2M, 3.5M, special multimode capable of being combined connects folder pin in addition, facilitates field wiring
Two, background system (or computing machine).
1, gps clock, GPRS communication management module.
2, measuring equipment administration module.
3, data inputting administration module.
4, data analysis module.
(1) head end voltage (Volt-Min, voltage V-minute curve form).
(2) terminal voltage (Volt-Min, voltage V-minute curve form).
(3) voltage drop calculates, and ratio, angular difference calculate, (voltage drop △ U-Min, voltage drop error-Min curve form).
(4) error statistics analysis.
(5) analysis result, state improvement project.
5, fault, false alarm module.
6, data Auto-Memory.
7, database software: commercial.
8, operating system software windows.
Three, annex
In measuring instrument equipment box, join each one group of 2.2M, 3.5M stranded shielding connection cable, 2 groups may be combined with special multimode connection folder pin in addition, facilitate field wiring.
The invention provides the method for the intelligent measure computational analysis of a kind of PT secondary circuit voltage and pressure drop; the method and access of this technical scheme of specific implementation is a lot; the above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.The all available prior art of each ingredient not clear and definite in the present embodiment is realized.
Claims (8)
1. a method for the intelligent measure computational analysis of PT secondary circuit voltage and pressure drop, is characterized in that,
Adopt two pressure measuring instruments, every platform pressure measuring instrument connects background computer by wireless network; Wherein a pressure measuring instrument connects PT secondary circuit head end, and another pressure measuring instrument connects PT secondary circuit end, measures by setting simultaneously; Two pressure measuring instruments are preserved and are measured the data obtained simultaneously.
2. method according to claim 1, is characterized in that, the precision of described two pressure measuring instruments is not less than 0.1%.
3. method according to claim 1, is characterized in that, described two pressure measuring instruments comprise GPS calibration.
4. method according to claim 1, is characterized in that, described two pressure measuring instruments adopt GPRS or CDMA or 3G or 4G network and background computer to carry out Wireless Data Transmission.
5. method according to claim 3, is characterized in that, described two pressure measuring instruments start simultaneously or terminate to measure by setting.
6. method according to claim 5, is characterized in that, described two pressure measuring instrument Automatic continuous are measured.
7. method according to claim 1, is characterized in that, background computer directly calculates pressure drop, voltage drop error, ratio, angular difference according to surveyed voltage vector.
8. method according to claim 1, is characterized in that, background computer processes the pressure measuring instrument measurement data that two have measurement relation simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410543049.1A CN104316746A (en) | 2014-10-14 | 2014-10-14 | Smart measurement and computational analysis method of PT secondary circuit voltage and pressure drop |
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| CN201410543049.1A CN104316746A (en) | 2014-10-14 | 2014-10-14 | Smart measurement and computational analysis method of PT secondary circuit voltage and pressure drop |
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| CN104316746A true CN104316746A (en) | 2015-01-28 |
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| CN201410543049.1A Pending CN104316746A (en) | 2014-10-14 | 2014-10-14 | Smart measurement and computational analysis method of PT secondary circuit voltage and pressure drop |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158539A (en) * | 2015-07-20 | 2015-12-16 | 钱坤 | Circuit for measuring voltage drop of PT secondary circuit on the basis of voltage drop eliminating device |
| CN106997002A (en) * | 2017-05-18 | 2017-08-01 | 贵州电网有限责任公司电力科学研究院 | Circuit structure and measuring method for measuring PT secondary circuit voltage drops and load |
| CN111879998A (en) * | 2020-07-31 | 2020-11-03 | 广东电网有限责任公司计量中心 | PT secondary loop voltage drop synchronous sampling method based on digital phase compensation |
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| JPH05232157A (en) * | 1992-02-19 | 1993-09-07 | Shikoku Electric Power Co Inc | Voltage drop detection device |
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| UA73795C2 (en) * | 2003-04-01 | 2005-09-15 | Donbass Interconnected Power S | Device for measuring voltage drop in the secondary winding circuit of a voltage transformer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158539A (en) * | 2015-07-20 | 2015-12-16 | 钱坤 | Circuit for measuring voltage drop of PT secondary circuit on the basis of voltage drop eliminating device |
| CN106997002A (en) * | 2017-05-18 | 2017-08-01 | 贵州电网有限责任公司电力科学研究院 | Circuit structure and measuring method for measuring PT secondary circuit voltage drops and load |
| CN106997002B (en) * | 2017-05-18 | 2023-09-01 | 贵州电网有限责任公司电力科学研究院 | Circuit structure and method for measuring PT secondary circuit voltage drop and load |
| CN111879998A (en) * | 2020-07-31 | 2020-11-03 | 广东电网有限责任公司计量中心 | PT secondary loop voltage drop synchronous sampling method based on digital phase compensation |
| CN111879998B (en) * | 2020-07-31 | 2021-10-08 | 广东电网有限责任公司计量中心 | PT secondary loop voltage drop synchronous sampling method based on digital phase compensation |
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Application publication date: 20150128 |