CN103513082B - A kind of electronic mutual inductor with error on-line monitoring function - Google Patents

A kind of electronic mutual inductor with error on-line monitoring function Download PDF

Info

Publication number
CN103513082B
CN103513082B CN201310407622.1A CN201310407622A CN103513082B CN 103513082 B CN103513082 B CN 103513082B CN 201310407622 A CN201310407622 A CN 201310407622A CN 103513082 B CN103513082 B CN 103513082B
Authority
CN
China
Prior art keywords
mutual inductor
signal
electronic mutual
electronic
error
Prior art date
Application number
CN201310407622.1A
Other languages
Chinese (zh)
Other versions
CN103513082A (en
Inventor
胡浩亮
李前
李鹤
李登云
熊前柱
杨春燕
Original Assignee
国家电网公司
中国电力科学研究院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 国家电网公司, 中国电力科学研究院 filed Critical 国家电网公司
Priority to CN201310407622.1A priority Critical patent/CN103513082B/en
Publication of CN103513082A publication Critical patent/CN103513082A/en
Application granted granted Critical
Publication of CN103513082B publication Critical patent/CN103513082B/en

Links

Abstract

Have an electronic mutual inductor for error on-line monitoring function, be made up of electronic type transformer high voltage side and electronic mutual inductor low-pressure side two parts, the signal that sensing head exports is connected to signal conditioning circuit; The signal that signal conditioning circuit exports is divided into two-way one tunnel to enter digital acquisition circuit, and a road enters pulses switch module; The signal that digital acquisition circuit exports and the signal that pulses switch module exports are connected to photoelectric conversion module respectively; Photoelectric conversion module is exported by the sampled value numeral that digital acquisition circuit produces by optical fiber and delivers to merge cells; The output of pulse signal that pulses switch module is exported by optical fiber by photoelectric conversion module is to electronic mutual inductor low-pressure side.Electronic mutual inductor of the present invention just monitors out the angular difference of electronic mutual inductor by comparing light pulse signal, achieve the on-line monitoring of electronic mutual inductor error easily.

Description

A kind of electronic mutual inductor with error on-line monitoring function

Technical field

The present invention relates to a kind of electronic mutual inductor with error on-line monitoring function, belong to electronic mutual inductor error on-line monitoring field.

Background technology

Electronic mutual inductor is one of digitizing in intelligent grid, intelligentized key equipment, at present because the reliability and stability of electronic mutual inductor need perfect, cause electronic mutual inductor run time fault rate higher, become the bottleneck that it applies in electric system.In order to address this problem, must find out in actual moving process, which factor can have impact to the error characteristics of electronic mutual inductor, so many experts and scholars have carried out the error characteristics research of the operation conditions of electronic mutual inductor, as patent " electronic mutual inductor with on-line condition monitoring " (application number: 201020690017.1), propose the real-time online status monitoring of the nucleus equipment key position to electronic mutual inductor, comprise the important states such as electronic mutual inductor humiture, analog to digital conversion reference level, light mouth state; Central China University of Science and Technology Wang Huan it is also proposed electronic mutual inductor on-line monitoring system in Master's thesis " research of electronic mutual inductor on-line monitoring system " in addition, mainly carries out status monitoring to parameters such as electronic mutual inductor temperature, air pressure, dielectric loss.

But above-described monitoring variable is all some physical quantitys and quantity of state, the error with electronic mutual inductor is difficult to set up direct relation, really cannot realize the error on-line monitoring of electronic mutual inductor.

Patent " optics and electromagnetic current transducer kinematic error real-time comparison method and device " (application number: 201210429190.x) proposes a kind of optics and electromagnetic current transducer kinematic error real-time comparison method and device, this device exports the secondary singal of (IEC61850 signal) and electromagnetic current transducer by the secondary gathering optical current mutual inductor, then error is calculated by algorithm, this method can effectively obtain electronic mutual inductor Real-time Error, but need to gather electronic mutual inductor and electromagnetic transformer secondary singal, calculate, process, process more complicated, also extra error can be introduced.

Summary of the invention

The object of the invention is: for the defect of prior art, the invention provides a kind of electronic mutual inductor with error on-line monitoring function, as a kind of electronic mutual inductor, a sub-high pressure (big current) signal measured by electronic mutual inductor is converted to pulse signal by electronic technology by it, by the comparison of the pulse signal between different electronic mutual inductor, observe its variable quantity, the on-line monitoring of electronic mutual inductor angular difference can be realized, thus provide a kind of new method for the error on-line monitoring of electronic mutual inductor.

The technical solution adopted in the present invention is: a kind of electronic mutual inductor with error on-line monitoring function, be made up of electronic type transformer high voltage side and electronic mutual inductor low-pressure side two parts, it is characterized in that, electronic type transformer high voltage side comprises sensing head, signal conditioning circuit, digital acquisition circuit, photoelectric conversion module, pulses switch module, and electronic mutual inductor low-pressure side comprises merge cells; The signal that sensing head exports is connected to signal conditioning circuit; The signal that signal conditioning circuit exports is divided into two-way one tunnel to enter digital acquisition circuit, and a road enters pulses switch module; The signal that digital acquisition circuit exports and the signal that pulses switch module exports are connected to photoelectric conversion module respectively; Photoelectric conversion module is exported by the sampled value numeral that digital acquisition circuit produces by optical fiber and delivers to merge cells; The output of pulse signal that pulses switch module is exported by optical fiber by photoelectric conversion module is to electronic mutual inductor low-pressure side.

Have the electronic mutual inductor of error on-line monitoring function as above, it is characterized in that, light pulse signal produces after signal conditioning circuit, and pulses switch module and digital acquisition circuit common source.

Have the electronic mutual inductor of error on-line monitoring function as above, it is characterized in that, electronic mutual inductor exports with light pulse, and its rising edge of a pulse is consistent with the zero cross signal of a high-voltage signal with negative edge.

The invention has the beneficial effects as follows: the present invention proposes a kind of electronic mutual inductor exported with light pulse, this light pulse signal is relevant to a sub-high pressure (big current) zero crossing, just monitoring out the angular difference of electronic mutual inductor by comparing light pulse signal, achieving the on-line monitoring of electronic mutual inductor error easily.

Accompanying drawing explanation

Fig. 1 is principle of work block diagram of the present invention.

Fig. 2 is embodiment of the present invention principle of work block diagram.

Fig. 3 is that in the present invention, pulse exports the graph of a relation between a signal.

Embodiment

In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, but content of the present invention is not only confined to the following examples.Those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values are equally within claims limited range listed by the application.

Description of symbols in accompanying drawing: 1-electronic type transformer high voltage side, 2-sensing head, 3-signal conditioning circuit, 4-digital acquisition circuit, 5-photoelectric conversion module, 6-pulses switch module, 7-merge cells, 8-electronic mutual inductor low-pressure side, 9-sampled value numeral exports, 10-zero-crossing pulse signal exports, 11-IEC61850 digital frame.

A kind of electronic mutual inductor with error on-line monitoring function provided by the invention, as a kind of electronic mutual inductor, a sub-high pressure (big current) signal measured by electronic mutual inductor is converted to pulse signal by electronic technology by it, the rising edge of pulse signal and negative edge corresponding with the zero crossing of a sub-high pressure (big current), if electronic mutual inductor angular difference is zero, phase differential between the zero crossing of then pulse signal and a sub-high pressure (big current) signal is also zero, phase relation between the zero crossing of i.e. pulse signal and a sub-high pressure (big current) can reflect the angular difference of electronic mutual inductor.

Because the key component affecting electronic mutual inductor error is on high-tension side electronic circuit, under actual operating mode, by ambient temperature, humidity, the factor impacts such as electromagnetic field, the running status of electronic circuit can change, and causes electronic mutual inductor unstable properties.Pulse signal above-mentioned only produces after signal conditioning circuit, and pulse switching circuit and digital acquisition circuit common source, under normal circumstances, if the running status of electronic circuit keeps stable, the phase relation between the zero crossing of pulse signal and a sub-high pressure (big current) should be stable.If the running status of electronic circuit changes, phase relation between the two also can change.

Like this by the comparison of the pulse signal between different electronic mutual inductor, observe its variable quantity, the on-line monitoring of electronic mutual inductor angular difference can be realized, thus provide a kind of new method for the error on-line monitoring of electronic mutual inductor.

As shown in Figure 1, the electronic mutual inductor with error on-line monitoring function of the present invention comprises electronic type transformer high voltage side 1, sensing head 2, signal conditioning circuit 3, digital acquisition circuit 4, photoelectric conversion module 5, pulses switch module 6, merge cells 7, electronic mutual inductor low-pressure side 8.

This electronic mutual inductor with error on-line monitoring function is made up of electronic type transformer high voltage side 1 and electronic mutual inductor low-pressure side 8 two parts.In electronic type transformer high voltage side 1, the signal that sensing head 2 exports is connected to signal conditioning circuit 3; The signal that signal conditioning circuit 3 exports is divided into two-way one tunnel to enter digital acquisition circuit 4, and a road enters pulses switch module 6; The signal that digital acquisition circuit 4 outputs signal and pulses switch module 6 exports is connected to photoelectric conversion module 5 respectively; Photoelectric conversion module 5 is exported by the sampled value numeral that digital acquisition circuit 4 produces by optical fiber and delivers to merge cells 7; The output of pulse signal that pulses switch module 6 is exported by optical fiber by photoelectric conversion module 5 is to electronic mutual inductor low-pressure side 8.

Pulses switch module 6 wherein and digital acquisition circuit 4 common source; Phase differential between its rising edge of pulse signal that pulses switch module 6 exports and a sub-high pressure (big current) signal zero crossing is no more than 10 points.

This has the electronic mutual inductor of error on-line monitoring function, its principle of work is: a sub-high pressure (big current) signal measured by electronic mutual inductor is converted to small-signal by sensing head by high-pressure side part, then the sine voltage signal being applicable to measuring is converted into by signal condition, again this Signal transmissions is converted to digital signal to digital acquisition circuit, pass through pulse switching circuit simultaneously, sine voltage signal is transformed to pulse signal, finally by photoelectric switching circuit, digital signal and pulse signal are converted to light signal by Optical Fiber Transmission to low-pressure side.It is characterized in that:

1, electronic mutual inductor exports with light pulse, and its rising edge of a pulse is consistent with the zero cross signal of a sub-high pressure (big current) signal with negative edge;

2, light pulse signal produces after signal conditioning circuit, and pulse switching circuit and digital acquisition circuit common source.

During concrete enforcement, as shown in Figure 2, same bus is provided with two electronic mutual inductors, one sub-high pressure (big current) is converted into weak electric signal by the sensing head of every platform electronic mutual inductor, then the sine voltage signal being applicable to measuring is converted into by signal condition, again this Signal transmissions is converted to digital signal to digital acquisition circuit, pass through pulse switching circuit simultaneously, sine voltage signal is transformed to pulse signal, finally by photoelectric switching circuit, digital signal and pulse signal is converted to light signal by Optical Fiber Transmission to low-pressure side.The phasometer phase differential measured between two pulse signals can obtain the phase error between two electronic mutual inductors .If two mutual inductors are all stable, then should be a stable value, if there occurs significant change, then illustrate and wherein have at least a mutual inductor running status to occur problem, need to be serviced maintenance, so just achieve the error on-line monitoring of electronic mutual inductor easily.

For on different bus, also can extend application further, if namely in actual transformer station, same bus only be equipped with an electronic mutual inductor, the mutual inductor not between homophase can be used to compare.Pulse signal such as between A phase and B phase mutual inductor is compared, if because generally substation operation mode does not change, the current-voltage correlation between each phase is a stationary value.So can the phase differential of comparer pulse signal for out of phase electronic mutual inductor if substation operation mode does not change, and there occurs change, then explanation has electronic mutual inductor operation abnormal.

The content be not described in detail in this instructions belongs to the known prior art of professional and technical personnel in the field.

Claims (3)

1. one kind has the electronic mutual inductor of error on-line monitoring function, be made up of electronic type transformer high voltage side and electronic mutual inductor low-pressure side two parts, it is characterized in that, electronic type transformer high voltage side comprises sensing head, signal conditioning circuit, digital acquisition circuit, photoelectric conversion module, pulses switch module, and electronic mutual inductor low-pressure side comprises merge cells; The signal that sensing head exports is connected to signal conditioning circuit; The signal that signal conditioning circuit exports is divided into two-way one tunnel to enter digital acquisition circuit, and a road enters pulses switch module; The signal that digital acquisition circuit exports and the signal that pulses switch module exports are connected to photoelectric conversion module respectively; Photoelectric conversion module is exported by the sampled value numeral that digital acquisition circuit produces by optical fiber and delivers to merge cells; The output of pulse signal that pulses switch module is exported by optical fiber by photoelectric conversion module is to electronic mutual inductor low-pressure side.
2. the electronic mutual inductor with error on-line monitoring function according to claim 1, is characterized in that, light pulse signal produces after signal conditioning circuit, and pulses switch module and digital acquisition circuit common source.
3. the electronic mutual inductor with error on-line monitoring function according to claim 1, it is characterized in that, electronic mutual inductor exports with light pulse, and its rising edge of a pulse is consistent with the zero cross signal of a high-voltage signal with negative edge.
CN201310407622.1A 2013-09-10 2013-09-10 A kind of electronic mutual inductor with error on-line monitoring function CN103513082B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310407622.1A CN103513082B (en) 2013-09-10 2013-09-10 A kind of electronic mutual inductor with error on-line monitoring function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310407622.1A CN103513082B (en) 2013-09-10 2013-09-10 A kind of electronic mutual inductor with error on-line monitoring function

Publications (2)

Publication Number Publication Date
CN103513082A CN103513082A (en) 2014-01-15
CN103513082B true CN103513082B (en) 2015-09-23

Family

ID=49896125

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310407622.1A CN103513082B (en) 2013-09-10 2013-09-10 A kind of electronic mutual inductor with error on-line monitoring function

Country Status (1)

Country Link
CN (1) CN103513082B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104502663B (en) * 2014-12-15 2017-11-10 北京世维通科技发展有限公司 A kind of optical fiber current mutual inductor device
CN109814060A (en) * 2019-01-03 2019-05-28 广西电网有限责任公司贵港供电局 The verification system and its method of more high-tension current inductors

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4767907B2 (en) * 2007-05-22 2011-09-07 日本電気計器検定所 Transformer test equipment
CN202025032U (en) * 2011-06-24 2011-11-02 武汉烽火富华电气有限责任公司 Electronic mutual inductor with on-line state monitoring
CN102928803B (en) * 2012-10-18 2015-02-04 中国电力科学研究院 Electronic transformer checking device based on synchronization pulse output power supply
CN102944860B (en) * 2012-10-31 2013-10-09 江苏省电力公司电力科学研究院 Method and device for comparing running errors of optical current transformer and electromagnetic current transformer in real time
CN103064052B (en) * 2012-12-31 2015-07-08 国家电网公司 Optical mutual inductor calibration and operation monitoring method and system
CN203551629U (en) * 2013-09-10 2014-04-16 国家电网公司 Electronic transformer with online error monitoring function

Also Published As

Publication number Publication date
CN103513082A (en) 2014-01-15

Similar Documents

Publication Publication Date Title
CN103630866B (en) Transient characterisitics detection system and the method for electronic type voltage transformer
CN103308823B (en) A kind of power distribution network single-phase disconnection phase to phase fault localization method
CN104270091B (en) A kind of photovoltaic power generation equipment method for diagnosing faults based on monitoring system
CN102611080B (en) Main station type small current grounding control method
CN103457238B (en) A kind of direct-current arc for photovoltaic generating system detects and guard method and circuit
CN101232177B (en) HVDC transmission line distance protecting method
CN102981084A (en) Comprehensive monitoring system for electric power system transformers
CN101651364B (en) Remote automation control high-voltage measurement comprehensive distribution equipment
CN105182229B (en) The dynamic measurement of power switch actuation time and ac zero-crossing point accuracy control method and application
CN103611631B (en) High-frequency high-voltage electrostatic dust removal power control system and method
CN103033715B (en) Operating status detection system for area equipment in converting station
CN103915836B (en) A kind of use for laboratory smart micro-grid system based on multiple distributed power sources
CN102520288B (en) Primary-rising based current differential protection synchronization performance testing system and testing method
CN102694373B (en) Intelligent electronic device using transient fault information and relay protection method
CN104267310B (en) A kind of voltage sag source localization method based on power of disturbance direction
CN205138439U (en) GIS generating line cabin deformation monitor sensor based on laser micrometer technique
CN203104120U (en) Integrated intelligent phase selection, measurement and control device
CN104898021B (en) A kind of distribution network fault line selection method based on k means cluster analyses
CN105445546B (en) A kind of intelligent acess formula electric energy meter with harmonic detection function
CN106291252A (en) A kind of 10kV line loss and low-voltage platform area line loss management analysis method
CN103529417A (en) Automatic detection system for fault indicators for distributing line
CN105137135A (en) Simulated electromagnetic disturbance source for isolating switch
CN102901925B (en) Super, extra-high voltage direct-current isolating switch conversing circuits characterisitic parameter method of testing
CN205982461U (en) Low -voltage distribution is electric detection means for cabinet
CN104765012A (en) Fault detection method, fault detection circuit and inverter

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
C41 Transfer of patent application or patent right or utility model
TA01 Transfer of patent application right

Effective date of registration: 20150825

Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing

Applicant after: State Grid Corporation of China

Applicant after: China Electric Power Research Institute

Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 100192

Applicant before: China Electric Power Research Institute

ASS Succession or assignment of patent right

Owner name: CHINA ELECTRIC POWER RESEARCH INSTITUTE

Effective date: 20150825

Owner name: STATE GRID CORPORATION OF CHINA

Free format text: FORMER OWNER: CHINA ELECTRIC POWER RESEARCH INSTITUTE

Effective date: 20150825

C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150923

Termination date: 20170910