CN205539129U - Three -phase electronic type combined mutual inductor - Google Patents
Three -phase electronic type combined mutual inductor Download PDFInfo
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- CN205539129U CN205539129U CN201620310786.1U CN201620310786U CN205539129U CN 205539129 U CN205539129 U CN 205539129U CN 201620310786 U CN201620310786 U CN 201620310786U CN 205539129 U CN205539129 U CN 205539129U
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Abstract
The embodiment of the utility model discloses three -phase electronic type combined mutual inductor, including combination sensor, signal processing device, signal conversion equipment and the merging cells who connects gradually, wherein, the combination sensor includes low -power iron core coil, air core coil, optics voltage sensor and gets can the coil, merging cells is connected with synchronization pulse generating device, just synchronization pulse generating device still with the combination sensor the signal processing device with arbitrary device among the signal conversion equipment is connected. The embodiment of the utility model provides a structure of having improved present air core coil and having got the ability coil has improved three -phase electronic type combined mutual inductor's measurement accuracy accords with smart power grids's measurement, the development trend that the protection precision improves day by day, and application prospect is wide.
Description
Technical field
This utility model relates to electric mutual inductor technical field, particularly relates to a kind of three-phase electronic combination transformer.
Background technology
Intelligent grid has become the focus that our times is paid close attention to, is the direction of electrical network future development.Intelligent grid relates to power system
Various aspects, in recent years, digital transformer substation quickly grows, and in digital transformer substation, metering circuit is by electronic type mutual inductance
Device, fiber optic network and digital instrument composition.
Electronic mutual inductor is made up of the one or more voltages or current sensor being connected to transmission system and two times transfer device, uses
It is proportional to measured amount, supply measuring instrument, instrument and relay protection or control circuit with transmission.Situation in digital interface
Under, export metrical information by combining unit.Electronic mutual inductor be digital transformer substation and intelligent substation key technology it
One, it instead of electromagnetic type and the capacitance type mutual inductor of routine completely, and electronic mutual inductor output is no longer electric current, voltage-mode
Analog quantity signal, but meet IE electric capacity C61850-9 and the digital signal of IE electric capacity C60044-8 standard, the accuracy of measurement,
Safety and reliability is largely increased.Existing three-phase electronic combination transformer can gather multichannel letter because of it simultaneously
Number, meet the advantage such as measurement, protection different accuracy simultaneously and be widely used.
But existing three-phase electronic combination transformer simply combines dissimilar transformer, does not make and changing
Entering, the raising therefore measuring, protecting equally accurate is limited, and current electronic mutual inductor certainty of measurement is the highest 0.1 grade.Along with
The defencive function of electrical network is enriched constantly, and the reliability requirement of electrical network parameter improves constantly, and improves the demand of the measuring accuracy of transformer
The most urgent, it is provided that the transformer of a kind of high measurement accuracy becomes the important research direction of those skilled in the art.
Utility model content
This utility model embodiment provides a kind of three-phase electronic combination transformer, to improve mutual inductance of the prior art
The certainty of measurement of device.
In order to solve above-mentioned technical problem, this utility model embodiment discloses following technical scheme:
The three-phase electronic combination transformer that this utility model embodiment provides, including the combination sensor being sequentially connected with, signal
Processing means, chromacoder and combining unit, described combination sensor includes low-power ironcore choke, air core coil, light
Learn voltage sensor and take energy coil, wherein:
Described low-power ironcore choke, described air core coil and described optical voltage sensor are connected in parallel, described in take can coil with
Described optical voltage sensor connects；
Described air core coil include series connection two wires around to contrary hollow subcoil, the wire turn of described hollow subcoil is equal
Even coiling, every wire turn coil section is equal, and described hollow subcoil includes two-layer coil, by mistake between described two-layer coil
Hole connects conducting, is connected by described via outside and have little wire turn, the wire turn of described little wire turn in the space between layer line astragal circle
The half of a length of described outer coil turn length；
Described combining unit connects synchronous pulse generating device, and described synchronous pulse generating device also senses with described combination
Device, described signal processing apparatus are connected with any device in described chromacoder.
Preferably, take described in and can include that be sequentially connected with takes energy coil body, high-voltage isolation protective circuit, rectifying and wave-filtering by coil
Circuit and reduction voltage circuit, connect between described current rectifying and wave filtering circuit and reduction voltage circuit and have overvoltage crowbar, and described reduction voltage circuit is even
Connect three DC/DC modules in parallel as the described power supply outfan taking energy coil.
Preferably, described high-voltage isolation protective circuit includes amplifying branch road, comparing branch road, negative feedback branch road and adjust output branch road,
Wherein:
Described amplification branch road connects and described adjusts output branch road, defeated for described high-voltage isolation protective circuit of described amplification branch road
Enter signal to be amplified；
Described negative feedback branch input connects the described output branch road that adjusts, the outfan described input comparing branch road of connection, institute
State negative feedback branch road for the described output signal transmission adjusting output branch road is compared branch road to described；
The described outfan comparing branch road connects and described adjusts output branch road, the described branch road that compares for detecting described output signal,
Obtain comparison signal, and the transmission of described comparison signal is adjusted output branch road to described；
Described output signal is adjusted by the described output branch road that adjusts according to described comparison signal.
Preferably, described negative feedback branch road includes metal-oxide-semiconductor and operational amplifier, wherein, described operational amplifier and described tune
Whole output branch road is connected, and described metal-oxide-semiconductor is connected with the described branch road that compares.
Preferably, described signal processing apparatus includes the first sensing circuit, the second sensing circuit and the sub-device of signal processing of parallel connection,
Described low-power ironcore choke is connected with described first sensing circuit by cable, and described air core coil is by cable and described the
Two sensing circuits are connected, and described optical voltage sensor is connected by optical fiber device with described signal processing；Wherein, institute
Stating the first sensing circuit identical with the electrical structure of described second sensing circuit, the sub-device of described signal processing is used for processing described light
Learn the signal that voltage sensor gathers.
Preferably, described chromacoder includes an A/D conversion equipment of parallel connection, the 2nd A/D conversion equipment and signal
Changing sub-device, a described A/D conversion equipment is connected with described first sensing circuit, described 2nd A/D conversion equipment with
Described second sensing circuit is connected, and described signal conversion sub-device device with described signal processing is connected；Wherein, described
Oneth A/D conversion equipment is identical with the electrical structure of described 2nd A/D conversion equipment, and described signal changes sub-device for institute
State and process the signal of sub-device and carry out A/D conversion.
Preferably, described chromacoder is connected by optical fiber with described combining unit.
Preferably, described synchronous pulse generating device is IEEE1588 synchronous pulse generating device.
From above technical scheme, the combination of a kind of three-phase electronic combination transformer that this utility model embodiment provides passes
Sensor circuit includes low-power ironcore choke, air core coil, the optical voltage sensor of parallel connection and takes energy coil, by described hollow
The structure of coil is improved, and improves the frequency of air core coil, uses two air core coils just can reach the highest measurement essence
Degree requirement；Compare tradition metering system based on air core coil needs multiple air core coil of connecting, application this utility model to change simultaneously
The air core coil overall structure entered is simple；What this utility model was used takes and can add high-voltage isolation protective circuit by coil, works as height
When pressure side bus electric current is bigger, by the negative feedback branch road in described high-voltage isolation protective circuit, output electric current is limited in one and determines
Value, reaches the purpose of insulation blocking, improve described in take can the safety of coil and stability；Described sensor device is with described
Signal processing apparatus, chromacoder, combining unit are sequentially connected, it is achieved that by the merit of voltage transformer summation current transformer
Energy feature combines more can hold measured electrical network parameter feature exactly.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will to embodiment or
In description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, for ordinary skill people
For Yuan, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of a kind of three-phase electronic combination transformer that Fig. 1 provides for this utility model embodiment；
Fig. 2 is the structural representation of Fig. 1 hollow core coil；
Fig. 3 is the structural representation that Fig. 1 takes energy coil；
Fig. 4 is the circuit theory diagrams that Fig. 3 takes the high-voltage isolation protective circuit in energy coil；
Fig. 5 is the circuit theory diagrams of sensing circuit in Fig. 1；
Fig. 6 is the structural representation of the sub-device of signal processing in Fig. 1.
Detailed description of the invention
For the technical scheme making those skilled in the art be more fully understood that in this utility model, below in conjunction with this practicality
Accompanying drawing in new embodiment, is clearly and completely described the technical scheme in this utility model embodiment, it is clear that
Described embodiment is only a part of embodiment of this utility model rather than whole embodiments.New based on this practicality
Embodiment in type, the every other reality that those of ordinary skill in the art are obtained under not making creative work premise
Execute example, all should belong to the scope of this utility model protection.
See Fig. 1, for the structural representation of a kind of three-phase electronic combination transformer that this utility model embodiment provides.
Due to three-phase electronic combination transformer described in this utility model embodiment comprise A phase, B phase and the combined transformer of C and
Described A phase, B phase transformer combined with C is identical, finally three-phase signal is merged output, the most only does
The wherein explanation of the combined transformer of A, the most biphase repeats no more.
The combined transformer of described A includes that the combined sensor of the A being sequentially connected with, A phase signals processing means, A phase signals turn
Changing device and combining unit A, the combined sensor of described A includes low-power ironcore choke A1, air core coil A2, optical voltage
Sensors A 3 and take can coil A4.Wherein, described low-power ironcore choke A1, described air core coil A2 and described optics electricity
Pressure sensor A3 is connected in parallel, described in take can coil A4 be connected with described optical voltage sensor A3.
Described low-power ironcore choke A1 does not occur saturated under certain big electric current, but exists during short trouble and overlap
Lock, reclosing operation can produce the biggest residual flux, makes described low-power ironcore choke A1 the most saturated, because of
This it can there is defect in terms of the measurement and protection of transient current, but described low-power ironcore choke A1 temperature influence is little
Much, mainly being affected by the temperature coefficient of integrating resistor, the resistance using temperature coefficient minimum just can reach good temperature
Degree stability, the most described low-power ironcore choke A1 easily meets the high accuracy degree measurement requirement in very wide-range current.
See Fig. 2, described air core coil A2 and include that two wires of series connection are around to contrary hollow subcoil, described hollow son
The wire turn of coil is uniform coiling, and every wire turn coil section is equal, and described hollow subcoil includes two-layer coil: solid line is
Upper coil, dotted line is bottom coil；Long line is big wire turn, and short-term is little wire turn.Connected by via between described two-layer coil
Conducting, is connected by described via in the space between layer line astragal circle outside and has the little wire turn, the turn length of described little wire turn to be
The half of described outer coil turn length.
Described air core coil A2 does not has magnetic core, and magnetic saturation will not occur, it is especially useful in measure and protect transient state, steady-state short-circuit electricity
Stream, is connected conducting by via between the two-layer coil of described air core coil A2, can eliminate the external magnetic field impact on transformer.
This utility model improves the construction features of existing air core coil: connected around to contrary hollow subcoil by two wires,
Achieve the loop line function in plain hollow coil, the output voltage of air core coil can be increased simultaneously；It addition, when wiring,
The biggest space is generally had between the wire turn of outer ring, in order to make full use of the confined space of described air core coil A2, this
Utility model embodiment space between the outer coil wire turn of described air core coil A2 is connected by described via and has little line
Circle, the turn length of described little wire turn is the half of described outer coil turn length.This utility model embodiment is used to provide
Air core coil A2 can improve frequency response, improves sampling precision；Described air core coil A2 by two wires around to contrary sky
Center coils connected in series forms, and traditional forward series connection air core coil then needs ten several hollow subcoils to be used in series to can be only achieved
Ideal effect, air core coil A2 of the present utility model significantly reduces manufacturing cost.
Described optical voltage sensor A3, have that insulation system is simple, dynamic range big, measure bandwidth, transient response is fast,
Capacity of resisting disturbance is strong, will not produce magnetic saturation and the advantage such as ferromagnetic resonance, little, lightweight, the output digitized of volume.
See Fig. 3, described in take can coil A4 taking of including being sequentially connected with can coil body, high-voltage isolation protective circuit, rectification
Filter circuit and reduction voltage circuit, connect between described current rectifying and wave filtering circuit and reduction voltage circuit and have overvoltage crowbar, described blood pressure lowering electricity
Road connects three DC/DC modules in parallel as the described power supply outfan taking energy coil A4.
Described taking coil body can be set on high-voltage side bus to carry out taking obtaining and take energy signal through high-voltage isolation protective, rectification
Filtering and reduction voltage circuit process, and the described voltage taking energy signal is down to 10V, and through three DC/DC modules in parallel, it is provided that
Direct current 10V/500mA power supply gives described low-power ironcore choke A1, described air core coil A2 and described optical voltage sensor A3.
Seeing Fig. 4, high-voltage isolation protective circuit described in described high-voltage isolation protective circuit includes amplifying branch road, compares branch road, negative
Feedback branch and adjustment output branch road.Described amplification branch road includes resistance R1、R2、R3、R4, metal-oxide-semiconductor M4、M5、M6、
M7、M8；The described branch road that compares includes comparator, sampling resistor R0With metal-oxide-semiconductor M2；Described negative feedback branch road includes metal-oxide-semiconductor M3
And operational amplifier, described adjustment output branch road includes metal-oxide-semiconductor M2With adjustment pipe Mp.
Described amplification branch road is for being amplified the input signal of described high-voltage isolation protective circuit；Described negative feedback branch road is used for
The described output signal transmission adjusting output branch road is compared branch road to described；The described branch road that compares is for detecting described output letter
Number, obtain comparison signal, and the transmission of described comparison signal is adjusted output branch road to described；The described output branch road that adjusts is according to institute
State comparison signal described output signal is adjusted.
Taking coil A4 to be that one time, high-pressure side bus punching takes energy, once takes and can have two difficult points, and one is when bus current is less
Time, take and can remain to sense sufficiently large electromotive force power supply source normal circuit operation by coil A4；Two is when bus current is bigger,
The electromotive force taking energy coil A4 sensing is excessive, needs be come into operation by control coil in time, to carry out reverse excitation, reduces iron core
In magnetic flux and shunt, thus avoid taking can the electromotive force of coil A4 sensing excessive and damage other modules.Described take energy
The current rectifying and wave filtering circuit of loop A 4, overvoltage crowbar and reduction voltage circuit use prior art, and this utility model embodiment is made
Improvement be to devise high-voltage isolation protective circuit, use operational amplifier the short resolution of void at metal-oxide-semiconductor M2Drain electrode constitute
One negative-feedback circuit, described negative-feedback circuit is by described metal-oxide-semiconductor M3Constitute with described operational amplifier.When described high_voltage isolation
The output end voltage V of protection circuitoutDuring reduction, described metal-oxide-semiconductor M3Grid potential raise, A point current potential decline；When described
The output end voltage V of high-voltage isolation protective circuitoutDuring rising, described metal-oxide-semiconductor M3Grid potential reduce, A point current potential rising,
Described negative-feedback circuit makes A point current potential with described output voltage VoutChange and change, it is ensured that described metal-oxide-semiconductor M2Convection current
Cross the accurate sampling of described adjustment pipe Mp electric current, improve high pressure and take the safety of energy.The reference voltage of described comparator is VRef,
Under normal operation, described sampling resistor R0On pressure drop VRO<VRef, described comparator output high level, described metal-oxide-semiconductor
M1Cut-off, the grid potential of described adjustment pipe Mp is exported by the amplifying circuit of system and determines；When exporting electric current and reaching certain value,
Described sampling resistor R0On pressure drop VR0>VRef, described comparator output low level, described metal-oxide-semiconductor M1Conducting, described adjustment
The grid potential of pipe Mp is drawn high, and output electric current is limited in a definite value, thus reaches the purpose of insulation blocking；It addition, institute
The outfan stating high-voltage isolation protective circuit is joined directly together with described adjustment pipe, and described sampling resistor R0Do not manage with described adjustment
Mp connects, at described sampling resistor R0On will not produce droop loss, improve the power supplying efficiency of described high-voltage isolation protective circuit.
Described A phase signals processing means includes the first sensing circuit A1, the second sensing circuit A2 and the signal processing dress of parallel connection
Put A3, described low-power ironcore choke A1 to be connected with described first sensing circuit A1 by cable, described air core coil A2
Being connected with described second sensing circuit A2 by cable, described optical voltage sensor A3 is by optical fiber and described signal processing
Sub-device A3 is connected；Wherein, described first sensing circuit A1 is identical with the electrical structure of described second sensing circuit A2,
Described first sensing circuit A1 is done concrete introduction by this utility model, and the second sensing circuit repeats no more.Described signal processing
Device A3 is for processing the signal that described optical voltage sensor A3 gathers.
Seeing Fig. 5, described first sensing circuit A1 is by resistance R4, resistance R5, resistance R6, resistance R7, electric capacity C1, electric capacity
C2Form with amplifier A.Wherein, described first sensing circuit A1 input UiBy resistance R4With electric capacity C1With described first
Sensing circuit A1 outfan UoIt is connected, described first sensing circuit A1 input UiBy resistance R1With resistance R3With amplifier
A positive input terminal is connected, electric capacity C2Ground connection is followed by amplifier A positive input terminal；Resistance R5Ground connection is followed by amplifier A negative input end,
Described first sensing circuit A1 outfan UoBy resistance R4It is connected with amplifier A negative input end.For reaching better effects, excellent
Select resistance R4For 10k Ω, resistance R5For 200k Ω, resistance R3For 470k Ω, resistance R4For 360k Ω, electric capacity C1For 550pF,
Electric capacity C2For 470pF.Input signal is filtered by described first sensing circuit A1, amplify and the fortune such as alternating current-direct current Signal separator
An A/D conversion equipment A1 is transmitted a signal to after calculation.See Fig. 6, in described signal processing device A3, described optics
Voltage sensor A3 by optical fiber transmission signal to PIN photoelectric detector (1 tunnel for measure signal, 1 tunnel for protection signal),
The output of two PIN photoelectric detector, respectively after current/voltage-converted, is filtered, amplifies and alternating current-direct current Signal separator etc.
Transmit a signal to signal after computing and change sub-device A3.
Described chromacoder includes an A/D conversion equipment A1, the 2nd A/D conversion equipment A2 and the signal conversion of parallel connection
Sub-device A3, a described A/D conversion equipment A1 are connected with described first sensing circuit A1, described 2nd A/D conversion dress
Put A2 to be connected with described second sensing circuit A2, described signal conversion sub-device A3 device with described signal processing A3 phase
Connect；Wherein, a described A/D conversion equipment A1 is identical with the electrical structure of described 2nd A/D conversion equipment A2, described
Signal is changed sub-device A3 and is carried out A/D conversion for the signal of device to described process.Described chromacoder is with described
Combining unit A is connected by optical fiber.
Described combining unit A connects synchronous pulse generating device, and described synchronous pulse generating device has 12 road electric power datas
Passage, every circuit-switched data passage exports 16 bit data, and these information are collected and defeated according to certain form by described combining unit A
Go out to digital electric energy meter, second protection and telemetry circuit.
Use IEEE1588 synchronous pulse generating device to described combining unit A, combining unit B, combining unit C and described A
Phase signals conversion equipment, B phase signals conversion equipment, C phase signals conversion equipment simultaneously pair time, it is ensured that the correctness of measurement and standard
Really property.
As seen from the above-described embodiment, described three-phase electronic combination transformer, utilize low-power ironcore choke, air core coil and light
Learn voltage sensor and gather voltage, current signal in transformer station as combination sensor, utilize take can coil power supply, will be gathered
To signal carry out sending into after processing conversion exporting after combining unit, synchronous circuit used is that IEEE1588 lock-out pulse occurs
Device.Described air core coil and the structure taking energy coil are made improvement, improves the safety of certainty of measurement and measurement with stable
Property.
The transformer being commonly used to measure can be divided into 0.1 grade, 0.2 grade, 0.5 grade, 1 grade, 3 grades, 5 grades, 10 grades, rank
The most from high to low, such as 0.2 grade expression 100～120% rated current, the current error limit is ± 0.2%, and other are followed successively by 0.5%,
1%, 3%, 5%, 10%；And relay protection Current Transformer, accuracy class can be divided into 5P level, 10P level etc., represents respectively
Electric current and phase place combination misalignment are respectively 5%, and 10%, the certainty of measurement that existing transformer can reach is 0.2, and transforming plant protecting is used
The precision of transformer mostly is 5P level and 10P level, and the protection precision of most transformers is 10P level, and this utility model embodiment
The three-phase electronic combination transformer provided is the optical, electrical electronic combined mutual inductor of three-phase, by transformer station's measuring circuit certainty of measurement
Bringing up to 0.05 grade, protecting circuit is 5P level, under current intelligent grid develops rapidly, uses this utility model to implement
The three-phase electronic combination transformer that example provides has obviously advantage in certainty of measurement, and safety is the highest, meets
The development trend of intelligent grid, has a extensive future.
It should be noted that in this article, such as the relational terms of " first " and " second " or the like be used merely to by
One entity or operation separate with another entity or operating space, and not necessarily require or imply these entities or behaviour
Relation or the order of any this reality is there is between work.And, term " includes ", " comprising " or it is any
Other variants are intended to comprising of nonexcludability so that include the process of a series of key element, method, article or
Equipment not only includes those key elements, but also includes other key elements being not expressly set out, or also includes for this mistake
The key element that journey, method, article or equipment are intrinsic.In the case of there is no more restriction, statement " include one
It is individual ... " key element that limits, it is not excluded that there is also in including the process of described key element, method, article or equipment
Other identical element.
The above is only detailed description of the invention of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of without departing from this utility model principle, it is also possible to make some improvements and modifications, these improve
Also protection domain of the present utility model is should be regarded as with retouching.
Claims (8)
1. a three-phase electronic combination transformer, turns including the combination sensor being sequentially connected with, signal processing apparatus, signal
Changing device and combining unit, it is characterised in that described combination sensor includes low-power ironcore choke, air core coil, optics electricity
Pressure sensor and take can coil, wherein:
Described low-power ironcore choke, described air core coil and described optical voltage sensor are connected in parallel, described in take can coil with
Described optical voltage sensor connects；
Described air core coil include series connection two wires around to contrary hollow subcoil, the wire turn of described hollow subcoil is equal
Even coiling, every wire turn coil section is equal, and described hollow subcoil includes two-layer coil, by mistake between described two-layer coil
Hole connects conducting, is connected by described via outside and have little wire turn, the wire turn of described little wire turn in the space between layer line astragal circle
The half of a length of described outer coil turn length；
Described combining unit connects synchronous pulse generating device, and described synchronous pulse generating device also senses with described combination
Device, described signal processing apparatus are connected with any device in described chromacoder.
Three-phase electronic combination transformer the most according to claim 1, it is characterised in that described in take can coil include depending on
Taking of secondary connection can coil body, high-voltage isolation protective circuit, current rectifying and wave filtering circuit and reduction voltage circuit, described current rectifying and wave filtering circuit
With connection has overvoltage crowbar between reduction voltage circuit, described reduction voltage circuit connects three DC/DC modules in parallel and takes as described
The power supply outfan of energy coil.
Three-phase electronic combination transformer the most according to claim 2, it is characterised in that described high-voltage isolation protective electricity
Road includes amplifying branch road, comparing branch road, negative feedback branch road and adjust output branch road, wherein:
Described amplification branch road connects and described adjusts output branch road, defeated for described high-voltage isolation protective circuit of described amplification branch road
Enter signal to be amplified；
Described negative feedback branch input connects the described output branch road that adjusts, the outfan described input comparing branch road of connection, institute
State negative feedback branch road for the described output signal transmission adjusting output branch road is compared branch road to described；
The described outfan comparing branch road connects and described adjusts output branch road, the described branch road that compares for detecting described output signal,
Obtain comparison signal, and the transmission of described comparison signal is adjusted output branch road to described；
Described output signal is adjusted by the described output branch road that adjusts according to described comparison signal.
Three-phase electronic combination transformer the most according to claim 3, it is characterised in that described negative feedback branch road includes MOS
Pipe and operational amplifier, wherein, described operational amplifier is connected with the described output branch road that adjusts, described metal-oxide-semiconductor and described ratio
Relatively branch road is connected.
Three-phase electronic combination transformer the most according to claim 1, it is characterised in that described signal processing apparatus bag
Include the first sensing circuit, the second sensing circuit and the sub-device of signal processing of parallel connection, wherein:
Described low-power ironcore choke is connected with described first sensing circuit by cable, and described air core coil passes through cable and institute
Stating the second sensing circuit to be connected, described optical voltage sensor is connected by optical fiber device with described signal processing；
Described first sensing circuit is identical with the electrical structure of described second sensing circuit；
The sub-device of described signal processing is for processing the signal that described optical voltage sensor gathers.
Three-phase electronic combination transformer the most according to claim 5, it is characterised in that described chromacoder bag
Include an A/D conversion equipment of parallel connection, the 2nd A/D conversion equipment and signal and change sub-device, wherein:
A described A/D conversion equipment is connected with described first sensing circuit, described 2nd A/D conversion equipment and described second
Sensing circuit is connected, and described signal conversion sub-device device with described signal processing is connected；
A described A/D conversion equipment is identical with the electrical structure of described 2nd A/D conversion equipment；
Described signal is changed sub-device and is carried out A/D conversion for the signal of device to described process.
Three-phase electronic combination transformer the most according to claim 1, it is characterised in that described chromacoder with
Described combining unit is connected by optical fiber.
Three-phase electronic combination transformer the most according to claim 1, it is characterised in that described lock-out pulse fills
It is set to IEEE1588 synchronous pulse generating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620310786.1U CN205539129U (en) | 2016-04-14 | 2016-04-14 | Three -phase electronic type combined mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620310786.1U CN205539129U (en) | 2016-04-14 | 2016-04-14 | Three -phase electronic type combined mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205539129U true CN205539129U (en) | 2016-08-31 |
Family
ID=56792028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620310786.1U Withdrawn - After Issue CN205539129U (en) | 2016-04-14 | 2016-04-14 | Three -phase electronic type combined mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205539129U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759101A (en) * | 2016-04-14 | 2016-07-13 | 云南电网有限责任公司电力科学研究院 | Three-phase electronic combined mutual inductor |
| CN110632365A (en) * | 2019-09-27 | 2019-12-31 | 温彦衫 | Leakage protection current measuring method |
-
2016
- 2016-04-14 CN CN201620310786.1U patent/CN205539129U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759101A (en) * | 2016-04-14 | 2016-07-13 | 云南电网有限责任公司电力科学研究院 | Three-phase electronic combined mutual inductor |
| CN105759101B (en) * | 2016-04-14 | 2019-04-16 | 云南电网有限责任公司电力科学研究院 | A kind of three-phase electronic combination transformer |
| CN110632365A (en) * | 2019-09-27 | 2019-12-31 | 温彦衫 | Leakage protection current measuring method |
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