CN204945357U - A kind of electronic mutual inductor steady state error measuring means - Google Patents

A kind of electronic mutual inductor steady state error measuring means Download PDF

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Publication number
CN204945357U
CN204945357U CN201520535196.4U CN201520535196U CN204945357U CN 204945357 U CN204945357 U CN 204945357U CN 201520535196 U CN201520535196 U CN 201520535196U CN 204945357 U CN204945357 U CN 204945357U
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electronic
voltage transformer
current
mutual inductor
transformer
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郭丽萍
刘剑
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Shanghai Power Transmission & Distribution Testing Center Co Ltd
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Shanghai Power Transmission & Distribution Testing Center Co Ltd
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Abstract

The utility model relates to electric mutual inductor error checking technique field, a kind of electronic mutual inductor steady state error measuring means specifically, comprise electronic transducer calibration instrument, normalized current/voltage transformer (VT), tested electronic current/voltage transformer (VT) and up-flow stepup transformer, the primary side a of up-flow stepup transformer connects AC power, normalized current/voltage transformer (VT) To and tested electronic current/voltage transformer (VT) is provided with in the secondary loop of the primary side b of up-flow stepup transformer, by standard signal conversion equipment between the signal end L1 and L2 and K1 of normalized current/voltage transformer (VT) and K2 signal end, the Ix end of electronic transducer calibration instrument is provided with combiner, synchronous generator is provided with in electronic transducer calibration instrument, digital data acquisition passage and analog acquisition passage, the secondary of normalized current/voltage transformer (VT) To and tested electronic current/voltage transformer (VT) Tx is exported and is converted to digital quantity, carry out the calculating of ratio and angular difference, it is convenient to measure, accurately.

Description

A kind of electronic mutual inductor steady state error measuring means
[technical field]
The utility model relates to electric mutual inductor error checking technique field, specifically a kind of electronic mutual inductor steady state error measuring means.
[background technology]
Electronic mutual inductor is mainly used in the electric parameter metering of electric system and all kinds of test and the efficiency evaluation and test inputing or outputing the electric equipment of frequency conversion electricity." IEC60044-8 electronic current mutual inductor standard " is defined as follows electronic mutual inductor: a kind of device; be made up of the one or more voltage or current sensor that are connected to transmission system and two times transfer device; measured amount is proportional in order to transmission; supply surveying instrument, instrument and relay protection or control device; when digital interface, one group of electronic mutual inductor shares a merge cells and completes this function.
Because the principle of electronic mutual inductor is different with traditional type mutual inductor, electronic mutual inductor steady state error and the theory of errors of measurement of transient error measuring principle also with traditional mutual inductor completely different.Electronic mutual inductor error measure is that the secondary output of standard mutual inductor and test product mutual inductor is all converted to digital quantity, then carries out the calculating of ratio and angular difference.
According to GB20840.7 and IEC60044-7 " mutual inductor the 7th part: electronic type voltage transformer " and GB20840.8 and IEC60044-8 " mutual inductor the 8th part: electronic current mutual inductor ", the pilot project of electric mutual inductor is substantially identical with traditional mutual inductor, but test method and realization rate have very large difference.Error checking be electric mutual inductor test in of paramount importance one, due to the fast development of electronic mutual inductor, the demand of carrying out electronic mutual inductor test future will increase, and needs one error measuring system simply and easily.
[summary of the invention]
The utility model utilizes test center existing equipment to build pilot system, configure high-precision electric mutual inductor error testing instrument, set up the steady-state error of electronic mutual inductor and the measuring system of transient error, a kind of electronic mutual inductor steady state error measuring system carrying out ratio and angular difference calculating is provided.
To achieve these goals, design a kind of electronic mutual inductor steady state error measuring system, comprise electronic transducer calibration instrument, normalized current/voltage transformer (VT) To, tested electronic current/voltage transformer (VT) Tx and up-flow stepup transformer, the primary side a of up-flow stepup transformer connects AC power, normalized current/voltage transformer (VT) To and tested electronic current/voltage transformer (VT) Tx is provided with in the secondary loop of the primary side b of up-flow stepup transformer, the In side of described electronic transducer calibration instrument is provided with K1 and K2 signal end, by standard signal conversion equipment between the signal end L1 and L2 and K1 of normalized current/voltage transformer (VT) To and K2 signal end, the Ix end of described electronic transducer calibration instrument is provided with combiner, synchronous generator is provided with in electronic transducer calibration instrument, digital data acquisition passage and analog acquisition passage, the secondary of normalized current/voltage transformer (VT) To and tested electronic current/voltage transformer (VT) Tx is exported and is converted to digital quantity, carry out the calculating of ratio and angular difference.
Described tested electronic type voltage transformer adopts resitstance voltage divider, capacitive divider or pockeles effect to realize the conversion of primary voltage signal.
Described tested electronic current mutual inductor adopts Rogowski coil or Faraday effect to realize the conversion of primary current signal.
Standard signal converter, combiner, Ethernet, synchronous generator is adopted to carry out process and the transmission of signal.
The utility model has the advantage of: make full use of existing device, and be configured with high-precision electric mutual inductor error testing instrument, build steady-state error measuring system, utilize standard signal conversion equipment, combiner, electronic transducer calibration instrument etc., the secondary output of standard mutual inductor and tested mutual inductor is all converted to digital quantity, then carries out the calculating of ratio and angular difference, measure convenient, accurate, meet IEC61850-9-1, IEC61850-9-2LE, IEC60044-8FT3 stipulations.
[accompanying drawing explanation]
Fig. 1 is the wiring diagram of electronic current mutual inductor steady-state error measurement mechanism of the present utility model;
Fig. 2 is the principle schematic of electronic mutual inductor steady state error measuring system;
Specify Fig. 1 as Figure of abstract of the present utility model.
[embodiment]
Below in conjunction with accompanying drawing, the utility model is described in further detail, and the structure of this device and principle are very clearly concerning the people of this specialty.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Be illustrated in figure 1 the wiring diagram of electronic current mutual inductor steady-state error measuring system, wherein secondary exports as digital quantity, and in figure, To is standard current transformer, and Tx is tested electronic current mutual inductor.Electronic mutual inductor steady state error measuring system, comprise electronic transducer calibration instrument, normalized current/voltage transformer (VT) To, tested electronic current/voltage transformer (VT) Tx and up-flow stepup transformer, the primary side a of up-flow stepup transformer connects AC power, normalized current/voltage transformer (VT) To and tested electronic current/voltage transformer (VT) Tx is provided with in the secondary loop of the primary side b of up-flow stepup transformer, the In side of electronic transducer calibration instrument is provided with K1 and K2 signal end, by standard signal conversion equipment between the signal end L1 and L2 and K1 of normalized current/voltage transformer (VT) To and K2 signal end, the Ix end of electronic transducer calibration instrument is provided with combiner.Electronic type voltage transformer mainly adopts the modes such as resitstance voltage divider, capacitive divider or optical principle to realize the conversion of primary voltage signal; Electronic current mutual inductor mainly adopts the mode such as Rogowski coil, optical devices to realize the conversion of primary current signal.Different according to the principle of primary transducer, electronic mutual inductor can be divided into photoelectric induction type and induction two classes.No matter be optoelectronic induction or electromagnetic induction, its principle is all convert a signal to the digital signal of secondary or little analog quantity.
Fig. 2 is electronic mutual inductor error measuring system principle schematic, and normalized current/voltage transformer (VT) is converted to analog acquisition passage by standard signal conversion equipment.Tested electronic current/voltage transformer (VT) has, by combiner, Ethernet, signal is converted to digital data acquisition passage, synchronous generator, digital data acquisition passage and analog acquisition passage is provided with in electronic transducer calibration instrument, the secondary output of normalized current/voltage transformer (VT) and tested electronic current/voltage transformer (VT) is converted to digital quantity, carries out the calculating of ratio and angular difference.

Claims (4)

1. an electronic mutual inductor steady state error measuring system, comprise electronic transducer calibration instrument, normalized current/voltage transformer (VT) To, tested electronic current/voltage transformer (VT) Tx and up-flow stepup transformer, it is characterized in that the primary side a of up-flow stepup transformer connects AC power, normalized current/voltage transformer (VT) To and tested electronic current/voltage transformer (VT) Tx is provided with in the secondary loop of the primary side b of up-flow stepup transformer, the In side of described electronic transducer calibration instrument is provided with K1 and K2 signal end, by standard signal conversion equipment between the signal end L1 and L2 and K1 of normalized current/voltage transformer (VT) To and K2 signal end, the Ix end of described electronic transducer calibration instrument is provided with combiner, synchronous generator is provided with in electronic transducer calibration instrument, digital data acquisition passage and analog acquisition passage, the secondary of normalized current/voltage transformer (VT) To and tested electronic current/voltage transformer (VT) Tx is exported and is converted to digital quantity, carry out the calculating of ratio and angular difference.
2. a kind of electronic mutual inductor steady state error measuring system as claimed in claim 1, is characterized in that electronic type voltage transformer mainly adopts resistance, capacitive divider or pockeles effect to realize the conversion of primary voltage signal.
3. a kind of electronic mutual inductor steady state error measuring system as claimed in claim 1, is characterized in that electronic current mutual inductor mainly adopts Rogowaski coil or Faraday effect to realize the conversion of primary current signal.
4. a kind of electronic mutual inductor steady state error measuring system as claimed in claim 1, is characterized in that adopting standard signal converter, combiner, Ethernet, synchronous generator to carry out process and the transmission of signal.
CN201520535196.4U 2015-07-22 2015-07-22 A kind of electronic mutual inductor steady state error measuring means Active CN204945357U (en)

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Application Number Priority Date Filing Date Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106570209A (en) * 2016-10-10 2017-04-19 广州市格宁电气有限公司 AC resistance voltage divider correction method for error model established based on equivalence principle
CN108241138A (en) * 2018-01-26 2018-07-03 黄建钟 The detection device and detecting system of a kind of electric mutual inductor
CN109541516A (en) * 2018-11-20 2019-03-29 国家电网有限公司 A kind of voltage transformer wideband error measurement method
CN109884570A (en) * 2017-12-07 2019-06-14 广东电网有限责任公司东莞供电局 A kind of electronic current lift
CN106772188B (en) * 2016-11-17 2021-01-22 中国电力科学研究院 Mutual inductor operation characteristic evaluation method based on environmental influence factors and assessment platform
CN114002639A (en) * 2021-10-19 2022-02-01 华中科技大学 Relative error self-monitoring system and method of electric signal acquisition circuit

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106570209A (en) * 2016-10-10 2017-04-19 广州市格宁电气有限公司 AC resistance voltage divider correction method for error model established based on equivalence principle
CN106570209B (en) * 2016-10-10 2021-06-04 广州市格宁电气有限公司 Alternating current resistor voltage divider correction method for establishing error model based on equivalence principle
CN106772188B (en) * 2016-11-17 2021-01-22 中国电力科学研究院 Mutual inductor operation characteristic evaluation method based on environmental influence factors and assessment platform
CN109884570A (en) * 2017-12-07 2019-06-14 广东电网有限责任公司东莞供电局 A kind of electronic current lift
CN108241138A (en) * 2018-01-26 2018-07-03 黄建钟 The detection device and detecting system of a kind of electric mutual inductor
CN108241138B (en) * 2018-01-26 2023-11-21 黄建钟 Detection device and detection system of electronic transformer
CN109541516A (en) * 2018-11-20 2019-03-29 国家电网有限公司 A kind of voltage transformer wideband error measurement method
CN109541516B (en) * 2018-11-20 2022-04-15 国家电网有限公司 Voltage transformer broadband error measurement method
CN114002639A (en) * 2021-10-19 2022-02-01 华中科技大学 Relative error self-monitoring system and method of electric signal acquisition circuit

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