CN103713183A - CVT embedded power-grid voltage harmonic-wave monitoring system - Google Patents
CVT embedded power-grid voltage harmonic-wave monitoring system Download PDFInfo
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- CN103713183A CN103713183A CN201210374897.5A CN201210374897A CN103713183A CN 103713183 A CN103713183 A CN 103713183A CN 201210374897 A CN201210374897 A CN 201210374897A CN 103713183 A CN103713183 A CN 103713183A
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Abstract
The invention discloses a CVT embedded power-grid voltage harmonic-wave monitoring system which includes a CVT voltage-signal transmitter, an isolation sensor, a signal conditioner, a one-chip microcomputer, a communication interface, a real-time clock circuit and a data storage. A signal output end of the CVT voltage-signal transmitter is connected with a voltage-signal input end of the isolation sensor. A voltage-signal output end of the isolation sensor is connected with a voltage-signal input end of the signal conditioner. A signal output end of the signal conditioner is connected with a signal input end of the one-chip microcomputer. A communication port of the one-chip microcomputer is connected with an internal end of the communication interface. A clock port of the one-chip microcomputer is connected with the real-time clock circuit. A storage port of the one-chip microcomputer is connected with the data storage. The embedded harmonic-wave monitoring device is integral with a voltage transformer so that harmonic-wave monitoring at different points of the power grid is facilitated greatly and a harmonic-wave management project is promoted and electrical-energy quality of the power grid is improved.
Description
Technical field
The present invention relates to a kind of Power Network Voltage Monitor System, relate in particular to a kind of CVT Voltage Harmonic Supervision System Embedded.
Background technology
Develop rapidly along with modern power electronics technology, especially near power electronic equipment being widely used in electric system, each industrial sector and household electric appliances during the last ten years, cause a large amount of harmonic wave to inject electrical network, caused sharply rising and the decline of the quality of power supply of harmonic content in electrical network.Harmonic wave even injures the safety of electric system sometimes, to national economy, brings heavy losses.Meanwhile, the precision equipment of various complexity is very responsive to the quality of power supply, so power department and user have proposed urgent requirement to the improvement of harmonic wave.
Oneself has many manufacturer production harmonic wave testers both at home and abroad, but these instruments have following shortcoming: (1) price is higher; (2) laboratory or use out of doors, is applicable to scientific research, short-term power test, electrical network is patrolled and examined or monitoring temporarily, can not Real-Time Monitoring; (3) the independent special test equipment using, personal management and use, more single.Yet due to the popularity of electrical network and the ubiquity of harmonic wave, above instrument is difficult to meet the requirement of harmonic wave control.
Summary of the invention
Object of the present invention provides a kind of with regard to being in order to address the above problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
The present invention includes CVT voltage signal transmitter, isolation sensor, signal conditioner, single-chip microcomputer, communication interface, real time clock circuit and data storage, the signal output part of described CVT voltage signal transmitter is connected with the voltage signal input end of described isolation sensor, the voltage signal output end of described isolation sensor is connected with the voltage signal input end of described signal conditioner, the signal output part of described signal conditioner is connected with the signal input part of described single-chip microcomputer, the PORT COM of described single-chip microcomputer is connected with the inner of described communication interface, the clock port of described single-chip microcomputer is connected with described real time clock circuit, the storage port of described single-chip microcomputer is connected with described data storage.
Beneficial effect of the present invention is:
The invention provides a kind of Embedded Harmonics monitoring instrument, integrated with voltage transformer (VT), greatly facilitate the monitoring of electrical network each point harmonic wave, promote harmonic wave control engineering, improve the quality of power supply of electrical network.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of CVT Voltage Harmonic Supervision System Embedded of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1: the present invention includes CVT voltage signal transmitter, isolation sensor, signal conditioner, single-chip microcomputer, communication interface, real time clock circuit and data storage, the signal output part of described CVT voltage signal transmitter is connected with the voltage signal input end of described isolation sensor, the voltage signal output end of described isolation sensor is connected with the voltage signal input end of described signal conditioner, the signal output part of described signal conditioner is connected with the signal input part of described single-chip microcomputer, the PORT COM of described single-chip microcomputer is connected with the inner of described communication interface, the clock port of described single-chip microcomputer is connected with described real time clock circuit, the storage port of described single-chip microcomputer is connected with described data storage.
In the present invention, real time clock circuit is mainly used in integral point statistics and day statistics of monitor data, interocclusal record while also providing corresponding for measurement data simultaneously.
Data acquisition unit is mainly realized the sampling to tested mains voltage signal, and the result of sampling is stored, and data are carried out to respective handling, thus the effective value of acquisition voltage and THD value etc.Judge that whether voltage harmonic is out-of-limit simultaneously, out-of-limit if harmonic wave occurs, out-of-limit waveform is stored.
Communication interface mainly realizes monitor and PC data transmission, can realize by wired and wireless two kinds of modes the transmission of data.Meet the needs of communicating by letter of wireless operated device and monitoring instrument simultaneously.
Claims (1)
1. a CVT Voltage Harmonic Supervision System Embedded, it is characterized in that: comprise CVT voltage signal transmitter, isolation sensor, signal conditioner, single-chip microcomputer, communication interface, real time clock circuit and data storage, the signal output part of described CVT voltage signal transmitter is connected with the voltage signal input end of described isolation sensor, the voltage signal output end of described isolation sensor is connected with the voltage signal input end of described signal conditioner, the signal output part of described signal conditioner is connected with the signal input part of described single-chip microcomputer, the PORT COM of described single-chip microcomputer is connected with the inner of described communication interface, the clock port of described single-chip microcomputer is connected with described real time clock circuit, the storage port of described single-chip microcomputer is connected with described data storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210374897.5A CN103713183A (en) | 2012-10-08 | 2012-10-08 | CVT embedded power-grid voltage harmonic-wave monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210374897.5A CN103713183A (en) | 2012-10-08 | 2012-10-08 | CVT embedded power-grid voltage harmonic-wave monitoring system |
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| CN103713183A true CN103713183A (en) | 2014-04-09 |
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| CN201210374897.5A Pending CN103713183A (en) | 2012-10-08 | 2012-10-08 | CVT embedded power-grid voltage harmonic-wave monitoring system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557494A (en) * | 2018-12-11 | 2019-04-02 | 国网江苏省电力有限公司常州供电分公司 | A kind of harmonic measuring device and system based on capacitance type potential transformer |
| CN109839537A (en) * | 2019-02-21 | 2019-06-04 | 国网福建省电力有限公司龙岩供电公司 | A kind of judgment method of substation CVT harmonic measure accuracy |
| CN109839536A (en) * | 2019-02-21 | 2019-06-04 | 国网福建省电力有限公司龙岩供电公司 | A kind of substation CVT harmonic measure judgment means |
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| CN101387659A (en) * | 2008-11-05 | 2009-03-18 | 中电电气集团有限公司 | Transformer harmonic current analyzer |
| CN102323478A (en) * | 2011-08-23 | 2012-01-18 | 华北电力大学（保定） | Flexible wide area power grid harmonic synchronous monitoring system |
| JP2012145428A (en) * | 2011-01-12 | 2012-08-02 | Nissin Electric Co Ltd | Frequency measurement device |
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2012
- 2012-10-08 CN CN201210374897.5A patent/CN103713183A/en active Pending
Patent Citations (4)
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| CN101387659A (en) * | 2008-11-05 | 2009-03-18 | 中电电气集团有限公司 | Transformer harmonic current analyzer |
| JP2012145428A (en) * | 2011-01-12 | 2012-08-02 | Nissin Electric Co Ltd | Frequency measurement device |
| CN102323478A (en) * | 2011-08-23 | 2012-01-18 | 华北电力大学（保定） | Flexible wide area power grid harmonic synchronous monitoring system |
| CN202956431U (en) * | 2012-10-08 | 2013-05-29 | 四川金信石信息技术有限公司 | CVT embedded power grid voltage harmonic wave monitoring system |
Non-Patent Citations (1)
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| 姚旭东: "一种基于ARM的电力系统谐波检测仪的研究与设计", 《中国优秀硕士学位论文全文数据库工程科技II辑》, no. 03, 15 March 2012 (2012-03-15), pages 17 - 19 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557494A (en) * | 2018-12-11 | 2019-04-02 | 国网江苏省电力有限公司常州供电分公司 | A kind of harmonic measuring device and system based on capacitance type potential transformer |
| CN109839537A (en) * | 2019-02-21 | 2019-06-04 | 国网福建省电力有限公司龙岩供电公司 | A kind of judgment method of substation CVT harmonic measure accuracy |
| CN109839536A (en) * | 2019-02-21 | 2019-06-04 | 国网福建省电力有限公司龙岩供电公司 | A kind of substation CVT harmonic measure judgment means |
| CN109839536B (en) * | 2019-02-21 | 2020-12-04 | 国网福建省电力有限公司龙岩供电公司 | Transformer substation CVT harmonic measurement judgment device |
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Application publication date: 20140409 |