CN110082587A - Detection circuit and multiple-limb identification device - Google Patents
Detection circuit and multiple-limb identification device Download PDFInfo
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- CN110082587A CN110082587A CN201910326598.6A CN201910326598A CN110082587A CN 110082587 A CN110082587 A CN 110082587A CN 201910326598 A CN201910326598 A CN 201910326598A CN 110082587 A CN110082587 A CN 110082587A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
Abstract
The present invention relates to a kind of detection circuits and multiple-limb identification device.A kind of detection circuit, for detecting and receiving and dispatching pulsed current signal；It include: current-voltage conversion circuit, including current transformer and the first operational amplifier, the first current signal that the current transformer inputs for reducing its primary side；First operational amplifier is used to the second current signal that the Current Transformer Secondary side exports being converted to first voltage signal；Level-one amplifying circuit, for the first voltage signal to be enlarged into second voltage signal and is exported；Biasing circuit, for providing biasing voltage signal；And the second amplifying circuit；For the sum of the second voltage signal and described biasing voltage signal to be enlarged into tertiary voltage signal.Above-mentioned detection circuit, the sensitivity relative to the detection circuit in traditional identification device is higher, solves the problems, such as information crosstalk when identification.
Description
Technical field
The present invention relates to power supply technique fields, more particularly to a kind of detection circuit and multiple-limb identification device.
Background technique
How to meet the people and pursue good life electricity needs, promotes low-voltage distribution network lean management, get through and contacted with client
Last one kilometer is particularly important.For a long time, distribution low pressure basic data accuracy is to promote distribution lean management mainly difficult
Topic, the data correlations accuracy such as low pressure topology, specification of equipment, low pressure meter, customer information is very low, clears low-voltage platform family and visitor
Family information is the work task of top priority.But low-voltage platform area powers, and relationship is complicated, and power supply line intersects, and cable underground laying, into
The information such as row platform-family, branch-family are easy to appear information crosstalk when identifying, and the detection circuit in traditional identification device is sensitive
It spends lower, not can solve information cross-interference issue when identification.
Summary of the invention
Based on this, it is necessary to the sensitivity occurred for traditional detection circuit when platform-family, branch-family information identify
Lower problem provides a kind of detection circuit and multiple-limb identification device.
A kind of detection circuit, for detecting and receiving and dispatching pulsed current signal；Include:
Current-voltage conversion circuit, including current transformer and the first operational amplifier, the Current Transformer Secondary
Two output ends of side are connect with two input terminals of first operational amplifier respectively；The current transformer is for dropping
First current signal of low its primary side input；First operational amplifier is used for the Current Transformer Secondary side is defeated
The second current signal out is converted to first voltage signal；
Level-one amplifying circuit is connect with first operational amplifier, for the first voltage signal to be enlarged into
Two voltage signals simultaneously export；
Biasing circuit is set between the level-one amplifying circuit and second amplifying circuit, for providing bias voltage letter
Number；And
The second amplifying circuit is connect with the level-one amplifying circuit and the biasing circuit, is used for described second
The sum of voltage signal and the biasing voltage signal are enlarged into tertiary voltage signal.
Above-mentioned detection circuit, including current-voltage conversion circuit, level-one amplifying circuit, biasing circuit and second level amplification electricity
Road；Wherein current-to-voltage converting circuit includes current transformer and the first operational amplifier；Pass through current-voltage conversion circuit
First voltage is converted to after the first electric current that current transformer primary side inputs is reduced；Level-one amplifying circuit is by first voltage
It is enlarged into second voltage, the amplification of the sum of bias voltage for second voltage and biasing circuit being exported using second amplifying circuit
For tertiary voltage.The detection circuit is higher relative to the sensitivity of the detection circuit in traditional identification device, solves identification
When occur information crosstalk the problem of.
The relational expression of first current signal and the first voltage signal in one of the embodiments, are as follows:
Wherein, the U1 is the first voltage signal, and the I1 is first current signal.
The level-one amplifying circuit is to the amplification factor of the first voltage signal in one of the embodiments,
4.6。
It in one of the embodiments, further include the first filter circuit, first filter circuit is set to described first
Between operational amplifier and the level-one amplifying circuit, for being filtered to the first voltage signal.
It in one of the embodiments, further include the second filter circuit, second filter circuit is set to the level-one
Between amplifying circuit and the second amplifying circuit, for removing the DC component in the second voltage signal.
The second amplifying circuit is to the second voltage signal and the bias voltage in one of the embodiments,
The amplification factor of the sum of signal is 1.5.
A kind of area's multiple-limb identification device, including being set to the host at distribution transformer end and being set to user terminal
Extension set, the host include: multiple detection circuits as described in claim 1~6 is any, for detecting and receiving and dispatching described point
The pulsed current signal that machine is sent；And
First modulation circuit, including trigger circuit and zero cross detection circuit, the zero cross detection circuit are described for detecting
The 220V alternating current zero crossing point moment at distribution transformer end, the trigger circuit are used for the 220V according to the distribution transformer end
Alternating current zero crossing point moment controls the on-off of the thyristor, and first modulation circuit is used to presupposed information parameter passing through institute
Thyristor is stated to be superimposed with the virtual voltage at the distribution transformer end as voltage signal and to send；The parameter preset letter
Breath is the parameter information obtained according to the pulsed current signal；
The extension set receives the voltage signal for sending the pulsed current signal.
The trigger circuit includes level-one monostable flipflop and second level monostable trigger in one of the embodiments,
Device；The level-one monostable flipflop is used to control the angle of flow of the thyristor；The second level monostable flipflop is for controlling
Make the triggering pulsewidth of the thyristor.
The trigger circuit is in the 220V ac zero-crossing point at the distribution transformer end in one of the embodiments,
The on-off of the thyristor is controlled at 0.5ms.
In one of the embodiments, the trigger circuit control the angle of flow of the thyristor range be 0.2ms~
0.5ms。
Detailed description of the invention
Fig. 1 is the structural block diagram schematic diagram of the detection circuit in an embodiment.
Fig. 2 is the circuit diagram of the detection circuit in an embodiment.
Fig. 3 is the circuit diagram of the trigger circuit in an embodiment.
Specific embodiment
In order to which the objects, technical solutions and advantages of the application are more clearly understood, with reference to the accompanying drawings and embodiments,
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain this Shen
Please, it is not used to limit the application.
In the description of the present application, it is to be understood that term " center ", " transverse direction ", "upper", "lower" "left", "right",
The orientation or positional relationship of the instructions such as "vertical", "horizontal", "top", "bottom", "inner" and "outside" is side based on the figure
Position or positional relationship are merely for convenience of description the application and simplify description, rather than the device or member of indication or suggestion meaning
Part must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.This
Outside, it should be noted that when element is referred to as " being formed on another element ", it be can be directly connected on another element
Or it may be simultaneously present centering elements.When an element is considered as " connection " another element, it be can be directly connected to
Another element exists simultaneously centering elements.On the contrary, being not present when element is referred to as " directly existing " another element "upper"
Intermediary element.
In one embodiment, as shown in fig. 1, detection circuit includes current-voltage conversion circuit 100, level-one amplification electricity
Road 200, biasing circuit 300 and second amplifying circuit 400.Detection circuit is for detecting and receiving and dispatching pulse current.
It is as shown in Figure 2 the circuit diagram of the detection circuit in an embodiment.Current-voltage conversion circuit 100 includes electricity
Current transformer CT_A1 and the first operational amplifier U1D.Current transformer is according to electromagnetic induction principle by primary side high current
The instrument for being converted into secondary side low current to measure is made of the iron core and winding that are closed, and primary side umber of turn is very
It is few, it goes here and there in the route for the electric current for needing to measure.The pulse current of outside output is i.e. from Current Transmit _ A1 primary side
First current signal of input is reduced to the second current signal after the Current Transmit _ A1, and from current transformer
The output end of the secondary side of CT_A1 exports.Optionally, the first current signal is 1000 times of the second current signal, i.e., electric current is mutual
Sensor CT_A1 will be exported after 1000 times of the decaying of the first current signal linear by its secondary side, avoid burning since electric current is excessive
Circuit element in detection circuit.
Two output ends of Current Transmit _ A1 secondary side are inputted with two of the first operational amplifier U1D respectively
Second current signal is exported and gives operational amplifier U1D by end connection, Current Transmit _ A1 secondary side.In operational amplifier
Resistance R1 in parallel, is converted to first voltage signal for the second current signal between the reverse input end and output end of U1D, and
First voltage signal is exported by the output end of operational amplifier U1D.By the size adjustable first for adjusting resistance R1
The size of voltage signal.In the present embodiment, can also can reduce in the both ends shunt capacitance C1 of resistance R1 to high-frequency signal
Impedance, the signal rate of climb accelerate, response speed is faster.
Level-one amplifying circuit 200 is connect with the first operational amplifier U1D.Level-one amplifying circuit 200 includes that the second operation is put
Big device U1B.First voltage signal is inputted from the noninverting input of second operational amplifier U1B.Level-one amplifying circuit 200 is used for
First voltage signal is enlarged into second voltage signal and is exported from output end.
Biasing circuit 300 is set between level-one amplifying circuit 200 and second amplifying circuit 400, for providing biased electrical
Press signal.Biasing circuit 300 includes third operational amplifier U1C.The biasing that the output end of third operational amplifier U1C provides
Voltage signal inputs to second amplifying circuit together with the second voltage signal that the output end of second operational amplifier U1B provides
400。
Second amplifying circuit 400 is connect with level-one amplifying circuit 200 and biasing circuit 300.Second amplifying circuit 400 is used
In the sum of second voltage signal and biasing voltage signal are enlarged into tertiary voltage signal.Second amplifying circuit 400 includes the 4th
Operational amplifier U1A.Second voltage signal and biasing voltage signal are inputted from the noninverting input of four-operational amplifier, and
It will be exported after the amplification of the sum of second voltage signal and biasing voltage signal from output end.The third electricity of final detection circuit output
Pressure signal is to be suitble to the signal of analog-digital converter (ADC, Analog-to-Digital Converter) sampling to carry out modulus to turn
It changes and calculates.Wherein, the first operational amplifier U1D, second operational amplifier U1B, the fortune of third operational amplifier U1C and the 4th
It calculates amplifier U1A and is also possible to the amplifier in the same operational amplifier, such as the LM324 with four high guaily unit.It can also be
The elements such as filter capacitor are arranged in level-one amplifying circuit 200 and second amplifying circuit 400 to be filtered, to improve detection circuit
Sensitivity, keep finally detected pulse current more accurate.
Above-mentioned detection circuit includes current-voltage conversion circuit, level-one amplifying circuit, biasing circuit and second level amplification electricity
Road；Wherein current-to-voltage converting circuit includes current transformer and the first operational amplifier；Pass through electric current-voltage conversion circuit
First voltage is converted to after the first electric current that current transformer primary side inputs is reduced；Level-one amplifying circuit is by first voltage
It is enlarged into second voltage, the amplification of the sum of bias voltage for second voltage and biasing circuit being exported using second amplifying circuit
For tertiary voltage.The sensitivity of the detection circuit is higher, and when the detection circuit is applied in identification device, accurate in energy
While judging branch and the information such as separate, realizing a current clamp can recognize the branch of lower three phase lines of same branch
And the information such as separate attribute.
It is appreciated that above-mentioned current clamp is arranged at the zero curve of user terminal, because that neutral line current reflected is A, B, C
Three phase currents it is vector superposed.In the case where load balance, zero curve is not no electric current, that is to say, that any phase of A, B, C
Near zero-crossing point has current distortion, can all reflect in neutral line current, can be detected.So a current clamp can be used
It is arranged at zero curve, substitutes the mode of traditional A, B, C three-phase one current clamp of every phase, that is, uses a current clamp
Can recognize lower three phase lines of same branch branch and the information such as separate.
In one embodiment, the relational expression of the first current signal and first voltage signal is,
Wherein, U1 is first voltage signal, and I1 is the first current signal.By the value and Current Mutual Inductance that change resistance R1
At least one of device CT_A1 primary side and the current relationship of secondary side can change the first current signal and first voltage
The relationship of signal.
In one embodiment, level-one amplifying circuit 200 is 4.6 to the amplification factor of first voltage signal.
In one embodiment, detection circuit further includes the first filter circuit 500.First filter circuit 500 is set to first
Between operational amplifier U1D and level-one amplifying circuit 200.First filter circuit 500 is for filtering first voltage signal
Wave.In the present embodiment, the first filter circuit 500 is low-pass filter circuit, and low-pass filter circuit only passes through low frequency signal,
And the high-frequency signal more than setting critical value is then blocked, weakens.Optionally, the first filter circuit 500 includes resistance R2 and electricity
Hold C2.First filter circuit 500 exports again after filtering out the high-frequency signal in first voltage signal, makes the detection of pulse current
As a result more accurate, thus False Rate when reducing identification.
In one embodiment, detection circuit further includes the second filter circuit 600.Second filter circuit 600 is set to level-one
Between amplifying circuit 200 and second amplifying circuit 400.Second filter circuit 600 is used to remove the direct current in second voltage signal
Component keeps the testing result of pulse current more accurate.Optionally, the second filter circuit 600 includes capacitor C6.In this implementation
In example, second voltage signal is after capacitor C6 filtering with the sum of biasing voltage signal as the in the same direction of second amplifying circuit 400
The input signal of input terminal.
In one embodiment, times magnification of the second amplifying circuit 400 to the sum of second voltage signal and biasing voltage signal
Number is 1.5.
In one embodiment, a kind of multiple-limb identification device includes being set to the host at distribution transformer end and being set to
The extension set of user terminal.Host includes the first modulation circuit and multiple above-mentioned detection circuits.Detection circuit is for detecting and receiving and dispatching
The pulsed current signal that extension set is sent.First modulation circuit includes trigger circuit and zero cross detection circuit.Wherein, zero passage detection
Circuit is used to detect the 220V alternating current zero crossing point moment at distribution transformer end.Trigger circuit is used for according to distribution transformer end
The on-off of 220V alternating current zero crossing point moment control thyristor.First modulation circuit is used to presupposed information parameter passing through thyristor
It is superimposed with the virtual voltage at distribution transformer end as voltage signal and to send extension set.Parameter preset information is according to pulse
The parameter information that current signal obtains.
It is appreciated that host is normally at the ground that the platform of transformer becomes nearby or has A, B, C three-phase alternating current to power
Side, the first modulation circuit generates voltage signal in such a way that low frequency crosses zero carrier, then in a broadcast manner, is sent out this
Voltage signal.After extension set receives the voltage signal, processing, " platform-family " that can be obtained are decoded etc. to the voltage signal
Information.Extension set sends pulsed current signal to host.Current detection circuit in host detects extension set hair by forcipated mutual-inductor
The pulsed current signal sent, and " platform-branch " information is sent to extension set, extension set is based on " platform-family " information and " platform-branch "
Information generates " platform-branch-family " information, i.e. the platform area branch information of user terminal.
Above-mentioned multiple-limb identification device is that a kind of low frequency crosses the identification device that zero carrier and pulse-current technique combine.
Wherein, the anti-interference ability of low frequency zero passage carrier wave communication technology is stronger, even if the case where more transformer short distances are total to high pressure
Under, also can it is undistorted, do not generate border interference, and long transmission distance, on electronic equipment without influence, can accurately identify branch and
The information such as separate.Null sequence pulse-current technique is while accurately identifying branch, it is only necessary to which a current clamp is set to zero curve
Place is the branch that may recognize that three phase lines under same branch and separate attribute.Also, multiple detection circuits increase can be same
When the quantity of branch that detects, avoid the area Duo Tai equipment and detect the occurred information crosstalk of a transformer jointly and can not know
Other predicament, testing cost is lower, while decreasing the number that inspector contacts electrification busbar, and operational risk is smaller.
In one embodiment, as shown in figure 3, trigger circuit includes level-one monostable flipflop U3A and the touching of second level monostable
Send out device U5A.Wherein U2A is and door, such as SB74HC08D；U4A is nor gate, such as SN74HC02D；Level-one monostable trigger
Device U3A and second level monostable flipflop U5A can be CD4538.This distinguishes branch identification device, by using hardware controls crystalline substance
The angle of flow and triggering pulsewidth of brake tube, can mitigate the burden of the central processing unit of host, moreover it is possible to program be avoided to crash and run
Turn on thyristors angle caused by flying is excessive and burns thyristor.Distribution transformer end 220V exchange in A phase synchronization signal and
The MODE1 signal that the central processing unit of host issues with the output signal after door U2A by passing through and monostable flipflop
U3A, by the angle of flow of level-one monostable flipflop U3A control thyristor.The size of the angle of flow of thyristor is by resistance VR21
It is determined with the value of capacitor C21.By the triggering pulsewidth of second level monostable flipflop U5A control thyristor.The triggering pulsewidth of thyristor
Size determined by the value of resistance VR22 and capacitor C22.The angle of flow of thyristor is controlled by level-one monostable flipflop U3A,
Second level monostable flipflop U5A controls the triggering pulsewidth of thyristor, even if software crash or race fly all change thyristor
The angle of flow, thyristor is not easy to burn, and uses the multiple-limb identification device more reliable and more stable.
In one embodiment, trigger circuit controls thyristor at the 220V ac zero-crossing point 0.5ms at distribution transformer end
On-off.
In one embodiment, the range of the angle of flow of trigger circuit control thyristor is 0.2ms~0.5ms.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of detection circuit, for detecting and receiving and dispatching pulsed current signal；It is characterised by comprising:
Current-voltage conversion circuit, including current transformer and the first operational amplifier, the two of the Current Transformer Secondary side
A output end is connect with two input terminals of first operational amplifier respectively；The current transformer is primary for reducing it
First current signal of side input；The second electricity that first operational amplifier is used to export the Current Transformer Secondary side
Stream signal is converted to first voltage signal；
Level-one amplifying circuit is connect with first operational amplifier, for the first voltage signal to be enlarged into the second electricity
Pressure signal simultaneously exports；
Biasing circuit is set between the level-one amplifying circuit and second amplifying circuit, for providing biasing voltage signal；With
And
The second amplifying circuit is connect with the level-one amplifying circuit and the biasing circuit, is used for the second voltage
The sum of signal and the biasing voltage signal are enlarged into tertiary voltage signal.
2. detection circuit according to claim 1, which is characterized in that first current signal and the first voltage are believed
Number relational expression are as follows:
Wherein, the U1 is the first voltage signal, and the I1 is first current signal.
3. detection circuit according to claim 1, which is characterized in that the level-one amplifying circuit believes the first voltage
Number amplification factor be 4.6.
4. detection circuit according to claim 1, which is characterized in that it further include the first filter circuit, first filtering
Circuit is set between first operational amplifier and the level-one amplifying circuit, for carrying out to the first voltage signal
Filtering.
5. detection circuit according to claim 1, which is characterized in that it further include the second filter circuit, second filtering
Circuit is set between the level-one amplifying circuit and the second amplifying circuit, for removing in the second voltage signal
DC component.
6. detection circuit according to claim 1, which is characterized in that the second amplifying circuit believes the second voltage
Number and the amplification factor of the sum of the biasing voltage signal be 1.5.
7. a kind of multiple-limb identification device, including being set to the host at distribution transformer end and being set to the extension set of user terminal,
It is characterized in that, the host includes: multiple detection circuits as described in claim 1~6 is any, described for detecting and receiving and dispatching
The pulsed current signal that extension set is sent；And
First modulation circuit, including trigger circuit and zero cross detection circuit, the zero cross detection circuit is for detecting the distribution
The 220V alternating current zero crossing point moment of transformer terminal, the trigger circuit according to the 220V at the distribution transformer end for exchanging
The zero point moment controls the on-off of thyristor, and first modulation circuit is used to presupposed information parameter passing through the thyristor and institute
The virtual voltage superposition at distribution transformer end is stated as voltage signal and to send；The parameter preset information is according to the arteries and veins
Rush the parameter information that current signal obtains；
The extension set receives the voltage signal for sending the pulsed current signal.
8. multiple-limb identification device according to claim 7, which is characterized in that the trigger circuit includes level-one monostable
Trigger and second level monostable flipflop；The level-one monostable flipflop is used to control the angle of flow of the thyristor；It is described
Second level monostable flipflop is used to control the triggering pulsewidth of the thyristor.
9. multiple-limb identification device according to claim 7, which is characterized in that the trigger circuit is in the distribution transformer
The on-off of the thyristor is controlled at the 220V ac zero-crossing point 0.5ms at device end.
10. multiple-limb identification device according to claim 7, which is characterized in that the trigger circuit control brilliant lock
The range of the angle of flow of pipe is 0.2ms~0.5ms.
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| CN201910326598.6A CN110082587A (en) | 2019-04-23 | 2019-04-23 | Detection circuit and multiple-limb identification device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111007315A (en) * | 2019-11-26 | 2020-04-14 | 武汉大学 | Circuit branch identification method based on current harmonic spectrum |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202929095U (en) * | 2012-12-10 | 2013-05-08 | Tcl集团股份有限公司 | AC over-current detection device |
| CN103543319A (en) * | 2013-09-06 | 2014-01-29 | 国家电网公司 | High-precision fast measuring circuit and method for wide-range currents in power system |
| CN203444012U (en) * | 2013-09-06 | 2014-02-19 | 国家电网公司 | High accuracy and rapid speed measurement circuit of wide range current in power system |
| CN104198794A (en) * | 2014-07-23 | 2014-12-10 | 浙江天正电气股份有限公司 | Zero sequence current transformer wire-break detection and residual current detection circuit |
| CN204086387U (en) * | 2014-10-11 | 2015-01-07 | 北京易艾斯德科技有限公司 | A kind of current collection circuit |
| CN104777388A (en) * | 2015-04-27 | 2015-07-15 | 山东达顺电子科技有限公司 | Method for recognizing power supply branch circuit users through zero sequence current sampling method |
| CN106199291A (en) * | 2016-08-26 | 2016-12-07 | 国网江苏省电力公司南京供电公司 | A kind of linear-elsatic buckling and electric energy metrical formula line loss analyzing instrument |
| CN206411187U (en) * | 2017-01-16 | 2017-08-15 | 合肥凯利科技投资有限公司 | A kind of low power consumption current signal pickup assembly |
| CN108037360A (en) * | 2017-11-10 | 2018-05-15 | 深圳供电局有限公司 | A kind of taiwan area identification device of safety and stability strong antijamming capability |
| CN210690678U (en) * | 2019-04-23 | 2020-06-05 | 深圳供电局有限公司 | Detection circuit and multi-branch identification device |
-
2019
- 2019-04-23 CN CN201910326598.6A patent/CN110082587A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202929095U (en) * | 2012-12-10 | 2013-05-08 | Tcl集团股份有限公司 | AC over-current detection device |
| CN103543319A (en) * | 2013-09-06 | 2014-01-29 | 国家电网公司 | High-precision fast measuring circuit and method for wide-range currents in power system |
| CN203444012U (en) * | 2013-09-06 | 2014-02-19 | 国家电网公司 | High accuracy and rapid speed measurement circuit of wide range current in power system |
| CN104198794A (en) * | 2014-07-23 | 2014-12-10 | 浙江天正电气股份有限公司 | Zero sequence current transformer wire-break detection and residual current detection circuit |
| CN204086387U (en) * | 2014-10-11 | 2015-01-07 | 北京易艾斯德科技有限公司 | A kind of current collection circuit |
| CN104777388A (en) * | 2015-04-27 | 2015-07-15 | 山东达顺电子科技有限公司 | Method for recognizing power supply branch circuit users through zero sequence current sampling method |
| CN106199291A (en) * | 2016-08-26 | 2016-12-07 | 国网江苏省电力公司南京供电公司 | A kind of linear-elsatic buckling and electric energy metrical formula line loss analyzing instrument |
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