CN102447303A - Novel distribution network device power supply - Google Patents

Novel distribution network device power supply Download PDF

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Publication number
CN102447303A
CN102447303A CN2011104061602A CN201110406160A CN102447303A CN 102447303 A CN102447303 A CN 102447303A CN 2011104061602 A CN2011104061602 A CN 2011104061602A CN 201110406160 A CN201110406160 A CN 201110406160A CN 102447303 A CN102447303 A CN 102447303A
Authority
CN
China
Prior art keywords
distribution network
modular converter
power supply
current
signal
Prior art date
Application number
CN2011104061602A
Other languages
Chinese (zh)
Inventor
张从柱
Original Assignee
湖州电力局
湖州泰仑电力自动化工程有限公司
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 湖州电力局, 湖州泰仑电力自动化工程有限公司 filed Critical 湖州电力局
Priority to CN2011104061602A priority Critical patent/CN102447303A/en
Publication of CN102447303A publication Critical patent/CN102447303A/en

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Abstract

The invention discloses a novel distribution network device power supply which comprises a first current transformer TA1 and a second current transformer TA2, a first I/U (current/voltage) conversion module and a second I/U conversion module as well as an intelligent electronic device (IED), wherein an output terminal A411 of the first current transformer TA1 is connected with a signal input terminal of the first I/U conversion module, an output terminal C411 of the second current transformer TA2 is connected with the signal input terminal of the second I/U conversion module, signal output terminals of the first I/U conversion module and the second I/U conversion module are connected to the intelligent electronic device IED, the current transformers reduces a sampling current signal in a measured circuit, and the reduced sampling current signal is converted into a voltage signal which can be accepted by the intelligent electronic device IED by virtue of the I/U conversion module. The novel distribution network device power supply disclosed by the invention can provide a reliable, durable and stable power supply for a distribution network device, system failure is reduced, maintenance cost is reduced, and popularization of distribution network automation is promoted.

Description

A kind of novel power distribution network device power supply
Technical field
The present invention relates to a kind of power distribution network device power supply, belong to the power system device field.
Background technology
Power distribution network is meant from power transmission network or regional power plant accepts electric energy, distributes or distribute to step by step by voltage the power network of all types of user on the spot through distribution facility.Current electric power network technique gets into the intelligent grid epoch, and the rack of power distribution network is further optimized, and distribution network automated technology is just progressively applied.
But the bottleneck problem that in the process that distribution network automated all-round popularization is used, runs into is the selection of power supply; Present most of switching station or switchyard device power supply adopt traditional high frequency switch power; High frequency switch power select probability of failure and the maintenance cost that has increased switching station or switchyard for use; Owing to have these deficiencies, make distribution network automated applying receive restriction to a certain degree.
Summary of the invention
Problem to be solved by this invention just provides a kind of novel power distribution network device power supply, can reliable, durable, stable power be provided for device, and the system failure of minimizing reduces maintenance cost, has promoted distribution network automated popularization.
For solving the problems of the technologies described above; The present invention adopts following technical scheme: a kind of novel power distribution network device power supply; Its spy is: comprise the first current transformer TA1 and the second current transformer TA2, an I/U modular converter and the 2nd I/U modular converter, intelligent electronic device IED; The output terminals A 411 of the said first current transformer TA1 connects the signal input part of an I/U modular converter; The output C411 of the said second current transformer TA2 connects the signal input part of the 2nd I/U modular converter; The signal output part of the one I/U modular converter and the 2nd I/U modular converter is connected to intelligent electronic device IED, and current transformer dwindles the sample rate current signal in the slowdown monitoring circuit, and the sample rate current signal after dwindling is converted to the receptible voltage signal of intelligent electronic device IED by the I/U modular converter.
Further, the I/U modular converter comprises fast saturation transformer and rectification filtering unit.
Further, the I/U modular converter also comprises lightning protection circuit.
Further, said fast saturation transformer is a R type transformer.
Beneficial effect of the present invention:
1, the present invention utilizes the sample rate current signal to produce power supply, does not come work with external power source, thereby improves the reliability of switching station work;
2, adopt two current transformers, i.e. generator two-way power supply prevents that effectively the distortion of fault phase signals from can not guarantee the normal supply of power supply and influencing the operate as normal of device;
3, adopt R type speed saturation transformer, utilize its saturation characteristic and voltage stabilizing circuit, make that inner member is unlikely overheated when electric current increases, reduce failure rate.
Description of drawings
Below in conjunction with accompanying drawing the present invention is done further explanation:
Fig. 1 is a circuit diagram of the present invention.
Among the figure: 1 the one I/U modular converter, 2 the 2nd I/U modular converters, 3 intelligent electronic device IED, TA1 first current transformer, TA2 second current transformer.
Embodiment
With reference to Fig. 1; A kind of novel power distribution network device power supply of the present invention; Comprise the first current transformer TA1 and the second current transformer TA2, an I/U modular converter 1 and the 2nd I/U modular converter 2, intelligent electronic device IED3; The output terminals A 411 of the said first current transformer TA1 connects the signal input part of an I/U modular converter 1; The output C411 of the said second current transformer TA2 connects the signal input part of the 2nd I/U modular converter 2; The signal output part of the one I/U modular converter 1 and the 2nd I/U modular converter 2 is connected to intelligent electronic device IED3, and current transformer dwindles the sample rate current signal in the slowdown monitoring circuit, and the sample rate current signal after dwindling is converted to the receptible voltage signal of intelligent electronic device IED3 by the I/U modular converter.
The I/U modular converter comprises fast saturation transformer, rectification filtering unit, lightning protection circuit; Through fast saturation transformer secondary and connecting resistance current source is become voltage source, become ± the 24V power supply through current rectifying and wave filtering circuit and lightning protection circuit again; The speed saturation transformer is a R type transformer, has efficient height, little, the lightweight advantage of volume.
Principle: the sample rate current signal feeds the first current transformer TA1 and the second current transformer TA2; The effect of current transformer is to convert the bigger primary current of numerical value into numerical value less secondary current through certain no-load voltage ratio; Be used for protecting, purposes such as measurement; Can regard current source as; The first current transformer TA1 and the second current transformer TA2 just can regard two current sources so, can prevent effectively that like this fault phase signals distortion from can not guarantee the normal supply of power supply and influencing the operate as normal of device; I/U modular converter inside is provided with R type speed saturation transformer, rectification filtering unit, lightning protection circuit, and is more stable through the feasible voltage signal of exporting of AC-DC conversion, fluctuating signal filtering of rectification filtering unit.Adopt fast saturation transformer, can guarantee that output voltage signal remains at certain numerical value, just can be for stable, reliable power supply is provided.
Through the foregoing description, the object of the invention is by in full force and effect having reached.But the above is merely specific embodiment of the present invention, but technical characterictic of the present invention is not limited thereto, and any those skilled in the art is in the field of the invention, and the variation of being done or modify all is encompassed among the claim of the present invention.

Claims (4)

1. novel power distribution network device power supply; It is characterized in that: comprise the first current transformer TA1 and the second current transformer TA2, an I/U modular converter and the 2nd I/U modular converter, intelligent electronic device IED; The output terminals A 411 of the said first current transformer TA1 connects the signal input part of an I/U modular converter; The output C411 of the said second current transformer TA2 connects the signal input part of the 2nd I/U modular converter; The signal output part of the one I/U modular converter and the 2nd I/U modular converter is connected to intelligent electronic device IED; Current transformer dwindles the sample rate current signal in the slowdown monitoring circuit, and the sample rate current signal after dwindling is converted to the receptible voltage signal of intelligent electronic device IED by the I/U modular converter.
2. a kind of novel power distribution network device power supply according to claim 1, it is characterized in that: the I/U modular converter comprises fast saturation transformer and rectification filtering unit.
3. a kind of novel power distribution network device power supply according to claim 2, it is characterized in that: the I/U modular converter also comprises lightning protection circuit.
4. a kind of novel power distribution network device power supply according to claim 2, it is characterized in that: said fast saturation transformer is a R type transformer.
CN2011104061602A 2011-12-08 2011-12-08 Novel distribution network device power supply CN102447303A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011104061602A CN102447303A (en) 2011-12-08 2011-12-08 Novel distribution network device power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011104061602A CN102447303A (en) 2011-12-08 2011-12-08 Novel distribution network device power supply

Publications (1)

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CN102447303A true CN102447303A (en) 2012-05-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102737827A (en) * 2012-07-13 2012-10-17 南京航空航天大学 Noncontact mutual inductor for detection of current phase

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006197758A (en) * 2005-01-14 2006-07-27 Kyushu Electric Power Co Inc Power supply device utilizing induced current of overhead ground wire
CN1932908A (en) * 2006-10-26 2007-03-21 梁明 Wireless on-line monitoring system and method with electric distribution network cable connector running state
CN101093943A (en) * 2007-06-28 2007-12-26 中国电力科学研究院 Power feeding equipment in high voltage / supervltage transmission system
CN101226411A (en) * 2008-01-22 2008-07-23 佛山市顺德区瑞德电子实业有限公司 Power consumption measuring and control method for sound system switch power source as well as special device thereof
CN202333975U (en) * 2011-12-08 2012-07-11 湖州电力局 Novel power distribution network device power supply

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006197758A (en) * 2005-01-14 2006-07-27 Kyushu Electric Power Co Inc Power supply device utilizing induced current of overhead ground wire
CN1932908A (en) * 2006-10-26 2007-03-21 梁明 Wireless on-line monitoring system and method with electric distribution network cable connector running state
CN101093943A (en) * 2007-06-28 2007-12-26 中国电力科学研究院 Power feeding equipment in high voltage / supervltage transmission system
CN101226411A (en) * 2008-01-22 2008-07-23 佛山市顺德区瑞德电子实业有限公司 Power consumption measuring and control method for sound system switch power source as well as special device thereof
CN202333975U (en) * 2011-12-08 2012-07-11 湖州电力局 Novel power distribution network device power supply

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102737827A (en) * 2012-07-13 2012-10-17 南京航空航天大学 Noncontact mutual inductor for detection of current phase
CN102737827B (en) * 2012-07-13 2015-04-22 南京航空航天大学 Noncontact mutual inductor for detection of current phase

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