CN101770006A - Novel method for checking electronic transducer - Google Patents

Novel method for checking electronic transducer Download PDF

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Publication number
CN101770006A
CN101770006A CN 201010123792 CN201010123792A CN101770006A CN 101770006 A CN101770006 A CN 101770006A CN 201010123792 CN201010123792 CN 201010123792 CN 201010123792 A CN201010123792 A CN 201010123792A CN 101770006 A CN101770006 A CN 101770006A
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China
Prior art keywords
signal
mutual inductor
simulation
standard
electronic
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Pending
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CN 201010123792
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Chinese (zh)
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刘陈
朱胜林
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刘陈
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Priority to CN 201010123792 priority Critical patent/CN101770006A/en
Publication of CN101770006A publication Critical patent/CN101770006A/en
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Abstract

The invention discloses a method for checking an electronic transducer. The method comprises: allowing a standard proportion power supply to act on a standard simulation transducer and a tested electronic transducer to generate a plurality sets of standard simulation signals and sampling signals; directly inputting the standard simulation signals into a simulation transducer checking instrument; if the sampling signal is a simulation output signal, directly inputting the sampling signal into the simulation transducer checking instrument and comparing the sampling signal with the standard simulation signal to obtain a ratio difference and an angular difference; and if the sampling signal is a digital signal, reducing the digital signal into the simulation signal through a DA switching circuit, inputting the digital signal into the simulation transducer checking instrument and comparing the digital signal with the standard simulation signal to obtain the ratio difference and the angular difference. A measuring method is simple and practicable and has the characteristics of low manufacturing cost, good stability, high accuracy and the like. Simultaneously, the method can be developed based on the original simulation transducer checking instrument and the DA switching circuit is arranged on the checking instrument to realize the checking of the digital output electronic transducer.

Description

Novel method for checking electronic transducer
Technical field
The present invention relates to the method for electric parameter measurement in a kind of electric system, relate in particular to a kind of method of calibration of electronic mutual inductor.
Background technology
Fast development along with digital transformer substation and intelligent grid; electronic mutual inductor has obtained very rapidly development; it is the visual plant of electric energy metrical and relay protection in the electric system; the secondary output of electronic mutual inductor is different with traditional electromagnetic transformer; be divided into two kinds of numeral output and simulation outputs, one realizes numeral output by merge cells by Ethernet high-voltage mutual inductor.One follows the standards such as IEC60044-7 electronic type voltage transformer standard, IEC60044-8 electronic current mutual inductor standard and IEC61850-9 that International Electrotechnical Commission issues this digital way of output.Safety, the stable operation of its long-time stability, reliability, security and electric system are closely related, underproof mutual inductor can have a strong impact on the safe operation of electric system, therefore mutual inductor must carry out verification to it before use or after long-term the use, after verification is qualified, can use.
Electronic transducer calibration instrument is the special-purpose exact instrument that is used to check and measure transformer error, at present more domestic producers measuring method commonly used has based on the electronic transducer calibration instrument of industrial computer with based on the electric mutual inductor tester of digital signal processor (D S P), and CN101413995A discloses a kind of apparatus for checking electronic type current mutual inductor as the Chinese invention patent application: two current sources send current signal A respectively 1And A 2, A 1Greater than A 2And the frequency difference, the benchmark mutual inductor is responsive A simultaneously 1With through amplifying the A of N after doubly 2, the responsive A of tested mutual inductor 1Merge cells simultaneously sends synchronization pulse to benchmark mutual inductor, tested mutual inductor and AD converter, and obtains the digital quantity of benchmark mutual inductor, tested transformer current sampled value constantly and the magnitude of voltage at sampling resistor two ends send control computer through the digital quantity of benchmark AD converter conversion back acquisition and after with its generated data frame at the synchronization pulse negative edge.Control computer is with the responsive A of benchmark mutual inductor 1The current signal of current signal that obtains and the output of tested mutual inductor compares, and tested mutual inductor ratio and angular difference are carried out verification, the responsive NA of benchmark mutual inductor 2Current signal that obtains and benchmark AD converter output voltage compare through the current signal that conversion obtains, and the benchmark mutual inductor is carried out self calibration.Though this calibration equipment has the high characteristics of testing accuracy, but the accuracy of the tested mutual inductor higher hamonic wave of verification simultaneously; But stability is not high, be not easy to secondary development, adopt merge cells to send synchronization pulse simultaneously to benchmark mutual inductor, tested mutual inductor and AD converter, and the magnitude of voltage that obtains the digital quantity of benchmark mutual inductor, tested transformer current sampled value and sampling resistor two ends at the synchronization pulse negative edge constantly send control computer through the digital quantity of benchmark AD converter conversion back acquisition and after with its generated data frame, this method is more loaded down with trivial details, keep in repair more tiredly, technology is still waiting further raising.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of novel method for checking electronic transducer is provided, utilize the method for calibration of original technology maturation, simulation mutual inductor that precision is high, the signal of Electrical Instrument Transducers with Digital output directly is reduced into simulating signal carries out verification, have characteristics such as low cost of manufacture, good stability, precision height.
Realize that technical scheme of the present invention is achieved in that
A kind of novel method for checking electronic transducer, at first act on the primary circuit of standard analog mutual inductor and tested electronic mutual inductor by adjustable verification power supply, described standard analog mutual inductor produces corresponding to the standard analog voltage signal of primary voltage or corresponding to the standard analog voltage signal of primary current, the secondary of described standard analog mutual inductor produces many group standard analog voltage check signals, and this checking signal is input in the simulation mutual-inductor tester after integrating the nominal value corresponding to described tested electronic mutual inductor output again;
The measured signal of described tested electronic mutual inductor output is a simulating signal, then is directly inputted in the simulation mutual-inductor tester and described standard analog voltage check signal compares, and draws ratio and angular difference;
The measured signal of described tested electronic mutual inductor output is a digital signal, then digital signal is reduced into simulating signal through merge cells and DA change-over circuit, be input to then the simulation mutual-inductor tester in and described standard analog voltage check signal compare, draw ratio and angular difference.
Described DA change-over circuit meets IEC60044-8 electronic current mutual inductor standard and IEC60044-7 electronic type voltage transformer standard.
The scope of described standard analog voltage check signal is 22.5mV-4V.
The present invention compared with prior art has following advantage:
Owing to adopt the method for calibration of original simulation mutual inductor, have characteristics such as low cost of manufacture, good stability, precision height.The measuring method simple possible, can develop on the basis based on former simulation mutual-inductor tester simultaneously, on tester, install one additional and meet IEC60044-8 electronic current mutual inductor standard and the IEC60044-7 electronic type voltage transformer is the DA change-over circuit of standard, just can realize making method of calibration have very big technology dirigibility to the checking electronic type transformers of numeral output.
Description of drawings
Fig. 1 is an electronic current mutual inductor verification schematic diagram in the prior art
Fig. 2 is a numeral output electronic current mutual inductor verification schematic diagram of the present invention
Fig. 3 is an analog electrical output minor current transformer verification schematic diagram of the present invention
Embodiment
Following examples are used to illustrate the present invention; but be not used for limiting the scope of the invention; the those of ordinary skill in relevant technologies field is under the situation that does not break away from the spirit and scope of the present invention; can also make various variations and modification; therefore; so the technical scheme that is equal to also belongs to category of the present invention, scope of patent protection of the present invention should be limited by every claim.
As seen from Figure 2, a kind of method of calibration of numeral output electronic mutual inductor:
At first act on the primary circuit of standard analog mutual inductor and tested electronic mutual inductor by adjustable verification power supply, the standard analog mutual inductor produces corresponding to the standard analog voltage signal of primary voltage or corresponding to the standard analog voltage signal of primary current, the secondary of standard analog mutual inductor produces many group standard analog voltage check signals, and this checking signal is input in the simulation mutual-inductor tester after integrating the nominal value corresponding to tested electronic mutual inductor output again; The measured number signal of tested electronic mutual inductor output, then digital signal is reduced into simulating signal through merge cells and DA change-over circuit, be input to then the simulation mutual-inductor tester in and standard analog voltage check signal compare, draw ratio and angular difference.
As seen from Figure 3, a kind of method of calibration of analog electrical output minor mutual inductor:
At first act on the primary circuit of standard analog mutual inductor and tested electronic mutual inductor by adjustable verification power supply, the standard analog mutual inductor produces corresponding to the standard analog voltage signal of primary voltage or corresponding to the standard analog voltage signal of primary current, the secondary of standard analog mutual inductor produces many group standard analog voltage check signals, and this checking signal is input in the simulation mutual-inductor tester after integrating the nominal value corresponding to tested electronic mutual inductor output again; The tested simulating signal of tested electronic mutual inductor output then is directly inputted in the simulation mutual-inductor tester and standard analog voltage check signal compares, and draws ratio and angular difference.
Wherein the DA change-over circuit meets IEC60044-8 electronic current mutual inductor standard and IEC60044-7 electronic type voltage transformer standard.
The scope of the tested simulation of standard analog voltage check signal and the output of tested electronic mutual inductor (or numeral) signal is 22.5mV-4V.

Claims (3)

1. novel method for checking electronic transducer, at first act on the primary circuit of standard analog mutual inductor and tested electronic mutual inductor by adjustable verification power supply, described standard analog mutual inductor produces corresponding to the standard analog voltage signal of primary voltage or corresponding to the standard analog voltage signal of primary current, the secondary of described standard analog mutual inductor produces many group standard analog voltage check signals, and this checking signal is input in the simulation mutual-inductor tester after integrating the nominal value corresponding to described tested electronic mutual inductor output again;
The measured signal of described tested electronic mutual inductor output is a simulating signal, then is directly inputted in the simulation mutual-inductor tester and described standard analog voltage check signal compares, and draws ratio and angular difference;
The measured signal of described tested electronic mutual inductor output is a digital signal, then digital signal is reduced into simulating signal through merge cells and DA change-over circuit, be input to then the simulation mutual-inductor tester in and described standard analog voltage check signal compare, draw ratio and angular difference.
2. a kind of novel method for checking electronic transducer according to claim 1 is characterized in that: described DA change-over circuit meets IEC60044-8 electronic current mutual inductor standard and IEC60044-7 electronic type voltage transformer standard.
3. a kind of novel method for checking electronic transducer according to claim 1 is characterized in that: the scope of described standard analog voltage check signal is 22.5mV-4V.
CN 201010123792 2010-03-15 2010-03-15 Novel method for checking electronic transducer Pending CN101770006A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010123792 CN101770006A (en) 2010-03-15 2010-03-15 Novel method for checking electronic transducer

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Application Number Priority Date Filing Date Title
CN 201010123792 CN101770006A (en) 2010-03-15 2010-03-15 Novel method for checking electronic transducer

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CN101770006A true CN101770006A (en) 2010-07-07

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102073029A (en) * 2011-02-16 2011-05-25 安徽省电力公司合肥供电公司 Electronic mutual inductor test system and test method
CN102073028A (en) * 2010-10-21 2011-05-25 中国南方电网有限责任公司超高压输电公司柳州局 Onsite stable state precision calibration system of electronic voltage transformer and calibration method thereof
CN102305893A (en) * 2011-05-25 2012-01-04 湖南省电力公司科学研究院 Method and device for checking power-factor angle of high voltage line of intelligent substation on site
CN103885021A (en) * 2013-12-09 2014-06-25 深圳市星龙科技股份有限公司 Electronic type mutual inductor verification instrument performance detection method and system
CN108303668A (en) * 2018-01-18 2018-07-20 国网浙江省电力有限公司电力科学研究院 The digitized measurement simulator based on three-phase high-voltage electric energy
CN108490380A (en) * 2018-04-16 2018-09-04 三峡大学 A kind of voltage current transformer on-line testing system
CN112379324A (en) * 2020-11-30 2021-02-19 国网河北省电力有限公司营销服务中心 Step response detection system of direct current transformer based on steepening leading edge current source
CN113311373A (en) * 2021-06-24 2021-08-27 广东电网有限责任公司 Calibration method and calibration device for direct-current voltage transformer calibrator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1513038A (en) * 1975-10-10 1978-06-01 Gen Electric Co Ltd Electrical transformers of the kind employing a magnetic core
CN101135723A (en) * 2007-07-26 2008-03-05 北京航空航天大学 Universal electric power mutual-inductor verify device
CN101413995A (en) * 2008-11-28 2009-04-22 南瑞航天(北京)电气控制技术有限公司 Apparatus for checking electronic type current mutual inductor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1513038A (en) * 1975-10-10 1978-06-01 Gen Electric Co Ltd Electrical transformers of the kind employing a magnetic core
CN101135723A (en) * 2007-07-26 2008-03-05 北京航空航天大学 Universal electric power mutual-inductor verify device
CN101413995A (en) * 2008-11-28 2009-04-22 南瑞航天(北京)电气控制技术有限公司 Apparatus for checking electronic type current mutual inductor

Non-Patent Citations (3)

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Title
《北京交通大学硕士学位论文》 20091115 马永跃 数字量输出型电子式互感器校验系统的研究 24-25 1-3 , 2 *
《华北电力大学硕士学位论文》 20091015 宁伟红 基于虚拟仪器的电子式互感器校验系统的设计与实现 第9-10页 1-3 , 2 *
《电力系统保护与控制》 20091116 杨慧霞等 几种电子式互感器校验方式的研究与比较 99-101 1-3 第37卷, 第22期 2 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102073028A (en) * 2010-10-21 2011-05-25 中国南方电网有限责任公司超高压输电公司柳州局 Onsite stable state precision calibration system of electronic voltage transformer and calibration method thereof
CN102073029A (en) * 2011-02-16 2011-05-25 安徽省电力公司合肥供电公司 Electronic mutual inductor test system and test method
CN102073029B (en) * 2011-02-16 2013-06-12 安徽省电力公司合肥供电公司 Electronic mutual inductor test system and test method
CN102305893A (en) * 2011-05-25 2012-01-04 湖南省电力公司科学研究院 Method and device for checking power-factor angle of high voltage line of intelligent substation on site
CN102305893B (en) * 2011-05-25 2013-09-25 湖南省电力公司科学研究院 Method and device for checking power-factor angle of high voltage line of intelligent substation on site
CN103885021A (en) * 2013-12-09 2014-06-25 深圳市星龙科技股份有限公司 Electronic type mutual inductor verification instrument performance detection method and system
CN108303668A (en) * 2018-01-18 2018-07-20 国网浙江省电力有限公司电力科学研究院 The digitized measurement simulator based on three-phase high-voltage electric energy
CN108490380A (en) * 2018-04-16 2018-09-04 三峡大学 A kind of voltage current transformer on-line testing system
CN112379324A (en) * 2020-11-30 2021-02-19 国网河北省电力有限公司营销服务中心 Step response detection system of direct current transformer based on steepening leading edge current source
CN113311373A (en) * 2021-06-24 2021-08-27 广东电网有限责任公司 Calibration method and calibration device for direct-current voltage transformer calibrator

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Application publication date: 20100707

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