CN208506109U - Induction based on line load electric current takes electrical measuring systems - Google Patents
Induction based on line load electric current takes electrical measuring systems Download PDFInfo
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- CN208506109U CN208506109U CN201821043945.1U CN201821043945U CN208506109U CN 208506109 U CN208506109 U CN 208506109U CN 201821043945 U CN201821043945 U CN 201821043945U CN 208506109 U CN208506109 U CN 208506109U
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Abstract
The utility model discloses a kind of inductions based on line load electric current to take electrical measuring systems; belong to two distant distribution terminal inductions and takes electrical measurement, including sequentially connected CT electricity getting device, full-wave rectification bridge, second order filter, system protection circuit, MPPT controller, MSP432 processor；One output end of second order filter is connected with the input terminal of a voltage detecting circuit, and the output end of the voltage detecting circuit connects an input terminal of the MSP432 processor；The secondary output of the CT electricity getting device is connected with the input terminal of power grid quality detection circuit, and the output end of the power grid quality detection circuit connects the input terminal of the MSP432 processor.The utility model uses multichannel power management system, intelligent power switching management, low current capacity operation can be realized in the case where no external power supply, utilize the thinking for protection of adaptively releasing, it is controlled using the monitoring of energy cell voltage with electronic power switch to realize that energy is released, to realize the protection of entire power-supply circuit, effectively extension life of product.
Description
Technical field
The utility model relates to two distant distribution terminal inductions to take Electric Measurement Technology field, and in particular to it is distant that one kind is applied to two
The induction based on line load electric current of distribution terminal takes electricity and measuring system.
Background technique
Broad, the grid structure complexity status based on China power distribution network distribution region, using economic, to install portable two distant
Basic model distribution terminal promotes automation coverage rate, distribution automation scale benefit is further formed, to China's power distribution network
Development is of great significance.But there are problems, especially power-supply system for existing aerial two distant basic model distribution terminals
With Fault feature of single phase earthing measuring system, the popularization and application of two distant distribution terminals are seriously limited.
Aerial two distant basic model distribution terminals existing at present are primarily present following problems, firstly, distribution line load current
Smaller, CT induction takes electric scarce capacity, centainly makes up although electricity can be taken to do by solar energy, solar energy way to take power is by wet weather
It and air quality influence, and are easy to appear the problem of power-supply system takes electric deficiency, can not support terminal long-play.Secondly,
When being applied to the biggish route of load current or fault moment short circuit current is big, power-supply system is easily caused to damage, although can rely on
Mos pipe and voltage monitoring carry out power drain, but still CT is easily caused to take electric power circuit clamper first diode fever serious.
Third, conventional failure indicator and two distant distribution terminals are basic in terms of phase (zero sequence) current measurement precision and frequency response characteristic
Upper missing.
Drawbacks described above will promote power supply reliability and propose challenge to distribution automation all standing is realized, therefore, power supply system
The innovation of system and current measurement will be following key technology and development trend.
Utility model content
The purpose of this utility model is to provide a kind of inductions based on line load electric current to take electrical measuring systems, to solve
Technical problem in above-mentioned background technique.
To achieve the goals above, the utility model takes following technical solution:
A kind of induction based on line load electric current provided by the utility model takes electrical measuring systems, including sequentially connected
CT electricity getting device, full-wave rectification bridge, second order filter, system protection circuit, MPPT controller, MSP432 processor；The second order
One output end of filter is connected with the input terminal of a voltage detecting circuit, described in the output end connection of the voltage detecting circuit
One input terminal of MSP432 processor；The secondary output of the CT electricity getting device is connected with the input terminal of power grid quality detection circuit,
The output end of the power grid quality detection circuit connects the input terminal of the MSP432 processor.
Further, the system protection circuit includes battery management system, energy steering circuit, overpower protecting, monitoring
Circuit, battery voltage sampling circuit, first diode, discharge resistance, metal-oxide-semiconductor and first capacitor composition；
The anode of the first diode connects an output end of the second order filter, the cathode of the first diode
It is separately connected one end of the first capacitor and the input terminal of the energy steering circuit, the other end connection of the first capacitor
The MPPT controller；
The output end of the energy steering circuit is separately connected the input terminal of the MPPT controller and the overpower is prevented
The input terminal of shield monitoring circuit, an output end of the overpower protecting, monitoring circuit connect the another of the MPPT controller
Input terminal, another output end of the overpower protecting, monitoring circuit connect an input terminal of the MSP432 processor；
The input terminal of the discharge resistance connects an output end of the second order filter, the output end of the discharge resistance
The source electrode of the metal-oxide-semiconductor is connected, the drain electrode of the metal-oxide-semiconductor connects the input terminal of the second order filter, the grid of the metal-oxide-semiconductor
Connect an input terminal of the MSP432 processor；
The battery management system is parallel with the second capacitor, and one end of second capacitor connects the negative of the second diode
Pole, the anode of second diode connect the cathode of the first diode, described in the other end connection of second capacitor
The input terminal of second order filter；
One output end of the battery management system connects the input terminal of the battery voltage sampling circuit, the cell tube
Another output end of reason system connects the input terminal of the energy steering circuit by first switch, and the first switch also passes through
Second switch connects one end of the first capacitor, and the output end of the battery voltage sampling circuit connects the MSP432 processing
One input terminal of device.
Further, the overpower protecting, monitoring circuit includes voltage monitoring comparator, the voltage monitoring comparator
Input terminal connect the output end of the energy steering circuit, another input terminal connection described two of the voltage monitoring comparator
The output end of rank filter, the output end of the voltage monitoring comparator connect an input terminal of the MSP432 processor.
Further, the voltage detecting circuit includes sequentially connected first resistor bleeder circuit, first voltage sampling
The input terminal of isolator, the first resistor bleeder circuit connects the second of the full-wave rectification bridge by the second order filter
The output end of pin, the first voltage sampling isolator connects the input terminal of the MSP432 processor.
Further, the power grid quality detection circuit include be sequentially connected second resistance bleeder circuit, second voltage is adopted
Sample isolator, two input terminals of the second resistance bleeder circuit are separately connected the both ends of the CT electricity getting device.
Further, the both ends of the CT electricity getting device are separately connected the first pin and third pipe of the full-wave rectification bridge
Foot；Second pin of the full-wave rectification bridge connects the input terminal and described of the discharge resistance by the second order filter
The input terminal of one diode；The output end of the discharge resistance connects the input terminal of the metal-oxide-semiconductor, the output end of the metal-oxide-semiconductor
The 4th pin of the full-wave rectification bridge is connected by the second order filter.
Further, relay protector is connected between CT electricity getting device and the MSP432 processor.
The utility model is the utility model has the advantages that the utility model is economical and practical, and using multichannel power management system, collection CT takes electricity
Pressure point of maximum efficiency tracking, backup battery, first capacitor management are in one, intelligent power switching management；Built-in disposable great Rong
Amount, the lithium thionyl chloride cell of long-life and high-performance charging first capacitor, can continuously take electricity within the scope of 3~630A of route,
Route 5A can meet product capacity operation, without battery, to effectively extend life of product.
For line fault overcurrent and lightning impulse, using the thinking for protection of adaptively releasing, using energy pond electricity
Pressure monitoring is controlled with electronic power switch to realize that energy is released, to realize the protection of entire power-supply circuit.
The additional aspect of the utility model and advantage will be set forth in part in the description, these will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical solution of the utility model embodiment
The attached drawing used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the utility model
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is that the induction based on line load electric current described in the utility model embodiment takes electrical measuring systems basic principle
Block diagram.
Fig. 2 is system protection circuit functional block diagram described in the utility model embodiment.
Fig. 3 is CT electricity getting device sectional view described in the utility model embodiment.
Fig. 4 is energy content of battery control unit functional block diagram described in the utility model embodiment.
Fig. 5 is current measurement sample circuit figure described in the utility model embodiment.
Fig. 6 is the circuit diagram of integrating circuit described in the utility model embodiment.
Wherein: 1-CT electricity getting device；2- full-wave rectification bridge；3- second order filter；4- system protection circuit；5-MPPT control
Device；6-MSP432 processor；7- voltage detecting circuit；8- power grid quality detection circuit；9- battery management system；10- energy control
Circuit processed；11- overpower protecting, monitoring circuit；12- battery voltage sampling circuit；13- first diode；14- discharge resistance；
15-MOS pipe；16- first capacitor；The second capacitor of 17-；The second diode of 18-；19- first switch；20- second switch；21-
One resistor voltage divider circuit；22- first voltage samples isolator；The second pin of 23-；24- second resistance bleeder circuit；25- second
Voltage sample isolator；The first pin of 26-；27- third pin；The 4th pin of 28-；29- relay protector.
Specific embodiment
The embodiments of the present invention is described in detail below, the example of the embodiment is shown in the accompanying drawings, wherein
Same or similar label indicates same or similar element or element with the same or similar functions from beginning to end.Lead to below
The embodiment for crossing attached drawing description is exemplary, and is only used for explaining the utility model, and cannot be construed to the utility model
Limitation.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being used in the specification of the utility model
Wording " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or
Add other one or more features, integer, step, operation, element and/or their group.It should be understood that used herein
" connection " or " coupling " may include being wirelessly connected or coupling, and the wording "and/or" used includes one or more associated
Any cell for listing item and all combination.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term) there is meaning identical with the general understanding of those of ordinary skill in the utility model fields.Also
It should be understood that those terms such as defined in the general dictionary should be understood that have in the context of the prior art
The consistent meaning of meaning will not be explained in an idealized or overly formal meaning and unless defined as here.
The utility model for ease of understanding is with reference to the accompanying drawing further explained the utility model with specific embodiment
Illustrate, and specific embodiment does not constitute the restriction to the utility model embodiment.
It should be appreciated by those skilled in the art that attached drawing is the schematic diagram of embodiment, the component in attached drawing is not necessarily
Implement necessary to the utility model.
Embodiment one
The utility model embodiment as shown in Figure 1 provides a kind of induction based on line load electric current and takes electrical measurement system
System, including sequentially connected CT electricity getting device 1, full-wave rectification bridge 2, second order filter 3, system protection circuit 4, MPPT controller 5,
MSP432 processor 6；One output end of the second order filter 3 is connected with the input terminal of a voltage detecting circuit 7, the voltage
The output end of detection circuit 7 connects an input terminal of the MSP432 processor 6；The secondary output of the CT electricity getting device 1 connects
There is the input terminal of power grid quality detection circuit 8, the output end of the power grid quality detection circuit 8 connects the MSP432 processor
6 input terminal.
As shown in Fig. 2, the system protection circuit 4 is anti-including battery management system 9, energy steering circuit 10, overpower
Shield monitoring circuit 11, battery voltage sampling circuit 12, first diode 13, discharge resistance 14, metal-oxide-semiconductor 15 and first capacitor 16
Composition；
The anode of the first diode 13 connects an output end of the second order filter 3, the first diode 13
Cathode be separately connected one end of the first capacitor 16 and the input terminal of the energy steering circuit 10, the first capacitor 16
The other end connect the MPPT controller 5；
The output end of the energy steering circuit 10 is separately connected the input terminal and the overpower of the MPPT controller 5
One output end of the input terminal of protecting, monitoring circuit 11, the overpower protecting, monitoring circuit 11 connects the MPPT controller 5
Another input terminal, it is one defeated to connect the MSP432 processor 6 another output end of the overpower protecting, monitoring circuit 11
Enter end；
The input terminal of the discharge resistance 14 connects an output end of the second order filter 3, the discharge resistance 14
Output end connects the source electrode of the metal-oxide-semiconductor 15, and the drain electrode of the metal-oxide-semiconductor 15 connects the input terminal of the second order filter 3, described
The grid of metal-oxide-semiconductor 15 connects an input terminal of the MSP432 processor 6；
The battery management system 9 is parallel with the second capacitor 17, and one end of second capacitor 17 connects the second diode
18 cathode, the anode of second diode 18 connect the cathode of the first diode 13, second capacitor 17 it is another
One end connects the input terminal of the second order filter 3；
One output end of the battery management system 9 connects the input terminal of the battery voltage sampling circuit 12, the electricity
Another output end of pond management system 9 connects the input terminal of the system capacity control circuit 10 by first switch 19, described
First switch 19 also connects one end of the first capacitor 16 by second switch 20, the battery voltage sampling circuit 12 it is defeated
Outlet connects an input terminal of the MSP432 processor 6.
The overpower protecting, monitoring circuit 11 includes voltage monitoring comparator, the input terminal of the voltage monitoring comparator
The output end of the energy steering circuit 10 is connected, another input terminal of the voltage monitoring comparator connects the second-order filter
The output end of device 3, the output end of the voltage monitoring comparator connect an input terminal of the MSP432 processor 6.
The voltage detecting circuit 7 includes sequentially connected first resistor bleeder circuit 21, first voltage sampling isolator
22, the input terminal of the first resistor bleeder circuit 21 connects the second of the full-wave rectification bridge 2 by the second order filter 3
The output end of pin 23, the first voltage sampling isolator 22 connects the input terminal of the MSP432 processor 6.
The power grid quality detection circuit 8 includes being sequentially connected second resistance bleeder circuit 24, second voltage sampling isolation
Device 25, two input terminals of the second resistance bleeder circuit 24 are separately connected the both ends of the CT electricity getting device 1.
The both ends of the CT electricity getting device 1 are separately connected the first pin 26 and third pin 27 of the full-wave rectification bridge 2；Institute
It states the second pin 23 of full-wave rectification bridge 2 and the input terminal of the discharge resistance 14 and described is connected by the second order filter 3
The input terminal of first diode 13；The output end of the discharge resistance 14 connects the input terminal of the metal-oxide-semiconductor 15, the metal-oxide-semiconductor
15 output end connects the 4th pin 28 of the full-wave rectification bridge 2 by the second order filter 3.
Relay protector 29 is connected between CT electricity getting device 1 and the MSP432 processor 6.
The CT electricity getting device, using nanocrystalline material coil, double opening structures, initial permeability is low, takes electric energy power strong.
As shown in figure 3, the coating cut lengths tolerance d1 of coil is 53.0 ± 1.0mm, the outer diameter d2 of coil is 75.5 ±
1.0mm。
The full-wave rectification bridge can reduce energy of the voltage in first diode using low pressure drop diode rectifier bridge
Amount loss.
Embodiment two
One kind that the utility model embodiment two provides is based on the induction of line load electric current and takes electricity and its measuring system, including
Sequentially connected CT electricity getting device 1, full-wave rectification bridge 2, second order filter 3, system protection circuit 4, MPPT controller 5, MSP432
Processor 6；One output end of the second order filter 3 is connected with the input terminal of a voltage detecting circuit 7, the voltage detecting electricity
The output end on road 7 connects an input terminal of the MSP432 processor 6；The secondary output of the CT electricity getting device 1 is connected with power grid
The input terminal of quality detection circuitry 8, the output end of the power grid quality detection circuit 8 connect the defeated of the MSP432 processor 6
Enter end.
The system protection circuit 4 includes battery management system 9, energy steering circuit 10, overpower protecting, monitoring circuit
11, battery voltage sampling circuit 12, first diode 13, discharge resistance 14, metal-oxide-semiconductor 15 and first capacitor 16 form；Described
The anode of one diode 13 connects an output end of the second order filter 3, and the cathode of the first diode 13 is separately connected
The other end of one end of the first capacitor 16 and the input terminal of the energy steering circuit 10, the first capacitor 16 connects institute
State MPPT controller 5；
The output end of the energy steering circuit 10 is separately connected the input terminal and the overpower of the MPPT controller 5
One output end of the input terminal of protecting, monitoring circuit 11, the overpower protecting, monitoring circuit 11 connects the MPPT controller 5
Another input terminal, it is one defeated to connect the MSP432 processor 6 another output end of the overpower protecting, monitoring circuit 11
Enter end；
The input terminal of the discharge resistance 14 connects an output end of the second order filter 3, the discharge resistance 14
Output end connects the source electrode of the metal-oxide-semiconductor 15, and the drain electrode of the metal-oxide-semiconductor 15 connects the input terminal of the second order filter 3, described
The grid of metal-oxide-semiconductor 15 connects an input terminal of the MSP432 processor 6；
The battery management system 9 is parallel with the second capacitor 17, and one end of second capacitor 17 connects the second diode
18 cathode, the anode of second diode 18 connect the cathode of the first diode 13, second capacitor 17 it is another
One end connects the input terminal of the second order filter 3；
One output end of the battery management system 9 connects the input terminal of the battery voltage sampling circuit 12, the electricity
Another output end of pond management system 9 connects the input terminal of the energy steering circuit 10 by first switch 19, and described first
Switch 19 also connects one end of the first capacitor 16, the output end of the battery voltage sampling circuit 12 by second switch 20
Connect an input terminal of the MSP432 processor 6.
The overpower protecting, monitoring circuit 11 includes voltage monitoring comparator, the input terminal of the voltage monitoring comparator
The output end of the energy steering circuit 10 is connected, another input terminal of the voltage monitoring comparator connects the second-order filter
The output end of device 3, the output end of the voltage monitoring comparator connect an input terminal of the MSP432 processor 6.
The voltage detecting circuit 7 includes sequentially connected first resistor bleeder circuit 21, first voltage sampling isolator
22, the input terminal of the first resistor bleeder circuit 21 connects the second of the full-wave rectification bridge 2 by the second order filter 3
The output end of pin 23, the first voltage sampling isolator 22 connects the input terminal of the MSP432 processor 6.
The power grid quality detection circuit 8 includes being sequentially connected second resistance bleeder circuit 24, second voltage sampling isolation
Device 25, two input terminals of the second resistance bleeder circuit 24 are separately connected the both ends of the CT electricity getting device 1.
The both ends of the CT electricity getting device 1 are separately connected the first pin 26 and third pin 27 of the full-wave rectification bridge 2；Institute
It states the second pin 23 of full-wave rectification bridge 2 and the input terminal of the discharge resistance 14 and described is connected by the second order filter 3
The input terminal of first diode 13；The output end of the discharge resistance 14 connects the input terminal of the metal-oxide-semiconductor 15, the metal-oxide-semiconductor
15 output end connects the 4th pin 28 of the full-wave rectification bridge 2 by the second order filter 3.
Wherein, the discharge resistance 14 is low-resistance high-power resistance, with high-power MOS tube 15, first capacitor 16, excessively function
Rate protecting, monitoring circuit collectively constitutes power control unit, and wherein overpower protecting, monitoring circuit is by low power consumption voltage monitoring element
And compare control supply voltage comparator composition.
The power control process of system includes:
The known first capacitor 16 sets voltage U0, voltage rating Ut, and detect the voltage of first capacitor.When its voltage
Less than setting voltage U0When, since the voltage that MSP432 analog sampling interface acquires first capacitor in real time is system power source voltage；
When its voltage is greater than setting voltage U0When, it is more than soft that the analog sampling interface of MSP432 core processing control unit, which collects voltage,
The setting value of part, at this moment MSP432 outputs interface and can output a signal to drive high-power MOS tube to act, subsequent CT rectification
After be shorted, electric current is released directly across first capacitor by high-power resistance.
As shown in figure 4, by boost power supply unit, MTTP controller, first capacitor management of charging and discharging unit, DC power supply
Linear transform circuit, backup power supply administrative unit, 2.6V High Temperature Lithium Cell, 5.5V first capacitor form power control unit.This
Essential core chip used in unit is ADP5091.ADP5091 provides limited collecting energy (from 16 μ W to 600mW ranges)
Efficient conversion, working loss be Asia μ W rank.It is cold-started circuit using inside, adjuster can be in the input electricity down to 380mV
Pressure starting.After cold start-up, adjuster can work normally in the input voltage range of 80mV to 3.3V.Additional 150mA
Adjusting output can be programmed by non-essential resistance divider or VID pin.By detecting input voltage, control loop can be by input electricity
Embossing wave is limited in fixed range, to keep stable DC-DC boost conversion.
Under OCV dynamic detection mode and non-detection mode, the programming point of adjustment of input voltage allows to mention to the maximum extent
Take the energy of collector.The charging control function of ADP5091/ADP5092 protects chargeable accumulator, and implementation method is by can
Programming charging termination voltage and shutdown discharge voltage monitor cell voltage.
Accurate voltage comparator built in the MTTP controller takes piezoelectric voltage by control, maintains CT inductive output always
Near maximum power point, whole improve takes electric energy power: after energy cell voltage big Mr. Yu's threshold values Un2, starting to backup power supply
Charging, is otherwise closed；This components set has minimum startup power supply voltage Un3, and when energy cell voltage is lower than Un3, this power supply is not
Start work, it is ensured that take electric CT secondary side UTake electricityVoltage is higher.
First capacitor management of charging and discharging unit automatically adjusts charging current method using hardware type, can be according to line load
Size of current and system micropower load state automatically adjust the charging current to first capacitor, utmostly improve energy
Utilization rate reduces energy fever waste.
The utility model embodiment two provides one kind and takes electricity and its measuring system based on the induction of line load electric current, for
At present when the power-supply system defect status of the first two distant distribution power automation terminal, gives and promotes the design scheme that CT takes electric energy power,
Overpower protection circuit is given, energy steering circuit is given, greatly improves the adaptation model of two distant distribution power automation terminals
It encloses, realizes that all standing provides certain technical guarantee for distribution automation.
Embodiment three
A kind of induction based on line load electric current described in the utility model embodiment three takes electrical measuring systems, wherein incuding
CT uses two coil configuration, is embedded in one group of Ross coil, uses as dedicated current sample, this Rogowski coil has very high
The linearity, higher precision, and use sample circuit as shown in Figure 5: and on current transformer pair side and connect a high-precision
Low Drift Temperature resistance, to provide residual voltage acquisition signaling interface, which mainly includes current transformer, precision resistance, line
Sexual isolation circuit, signal conversion circuit, ADC Acquisition Circuit.
Current transformer module uses dedicated high-precision rogowski coil, sampling linearity with higher, low-power consumption, body
The advantages that product is small, at low cost, the service performance with wide temperature range (- 40 DEG C~+70 DEG C), can be very good using outdoors
Overhead transmission line.
Phase-correcting circuit, has used the amplifier OPA2333 of high-performance, low cost, this amplifier has the function calibrated automatically
Can, extremely low offset voltage (10 μ V, maximum value), while over time with temperature change realize close to zero drift.Together
When also there is wide power use scope, it is therefore prevented that due to power supply be mutated caused by measurement accuracy reduction etc. it is a series of unpredictable
Problem, down to the single supply or dual power supply of 1.8V (± 0.9V) and up to 5.5V (± 2.75V).
The use of integrating circuit is the integral to input signal, the elimination of circuit offset voltage and the integral in feedback control
Compensation has very high temperature characterisitic, capacitance occurs with positive and negative temperature change using the high-performance capacitor of NOP material
Drift.It is illustrated in figure 6 the circuit diagram of the integrating circuit.This circuit is primarily to guarantee the complete of sampled analogue signals
Property.R in figurefIt is integrator drift bleeder resistance, for preventing saturation caused by integrator drift or cut off phenomenon, R4It needs to be greater than
Equal to 10R1, L2 connects with R4's for obtaining more accurate output signal, it is therefore an objective to have preferable signal integrity.
The use of block isolating circuit ensure that the accuracy of output end voltage biasing.
Signal amplification circuit, the use of this circuit are in order to guarantee that the amplitude of output signal is full scale, so as to rear end ADC
The accuracy of circuit sampling, which use high-precisions, the amplifier OPA2333 of low-power consumption.
ADC Acquisition Circuit has used two rank RC filter circuits, ensure that integrality, the workability of amplifier output signal,
The material of capacitor used in it is NOP material, and it is low temperature ticket that resistance, which uses, ensure that the accuracy of sampling.
In conclusion the utility model embodiment is by using programmable ADP5091 multichannel power management chip, collection
CT takes electric pressure point of maximum efficiency tracking (MTTP), and backup battery, super capacitance management are in one, intelligent power switching management；It is interior
Disposable large capacity, the lithium thionyl chloride cell of long-life and high-performance charge super capacitor are set, it can be in route 3~630A range
Interior continuously to take electricity, route 5A can meet product capacity operation, without battery, to effectively extend life of product, pole
The adaptation range of two distant distribution power automation terminals is improved greatly.
As seen through the above description of the embodiments, those skilled in the art can be understood that this is practical new
Type can be realized by means of software and necessary general hardware platform.Based on this understanding, the technology of the utility model
Substantially the part that contributes to existing technology can be embodied in the form of software products scheme in other words, the computer
Software product can store in storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions are used so that one
Computer equipment (can be personal computer, server or the network equipment etc.) execute each embodiment of the utility model or
Method described in certain parts of person's embodiment.
Those of ordinary skill in the art will appreciate that: the component in device in the utility model embodiment can be according to reality
The description for applying example is distributed in the device of embodiment, can also carry out corresponding change positioned at one or more different from the present embodiment
In a device.The component of above-described embodiment can be merged into a component, can also be further split into multiple subassemblies.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in
Change or replacement, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should
It is subject to the protection scope in claims.
Claims (8)
1. a kind of induction based on line load electric current takes electrical measuring systems, it is characterised in that: take electricity including sequentially connected CT
Device (1), full-wave rectification bridge (2), second order filter (3), system protection circuit (4), MPPT controller (5), MSP432 processor
(6)；One output end of the second order filter (3) is connected with the input terminal of a voltage detecting circuit (7), the voltage detecting electricity
The output end on road (7) connects an input terminal of the MSP432 processor (6)；The secondary output of the CT electricity getting device (1) connects
There is the input terminal of power grid quality detection circuit (8), the output end of the power grid quality detection circuit (8) connects at the MSP432
Manage the input terminal of device (6).
2. the induction according to claim 1 based on line load electric current takes electrical measuring systems, it is characterised in that: the system
Blanket insurance protection circuit (4) includes battery management system (9), energy steering circuit (10), overpower protecting, monitoring circuit (11), battery
Voltage sampling circuit (12), first diode (13), discharge resistance (14), metal-oxide-semiconductor (15) and first capacitor (16) composition；
The anode of the first diode (13) connects an output end of the second order filter (3), the first diode
(13) cathode is separately connected one end of the first capacitor (16) and the input terminal of the energy steering circuit (10), and described
The other end of one capacitor (16) connects the MPPT controller (5)；
The output end of the energy steering circuit (10) is separately connected the input terminal and the overpower of the MPPT controller (5)
The input terminal of protecting, monitoring circuit (11), an output end of the overpower protecting, monitoring circuit (11) connect the MPPT control
Another output end of another input terminal of device (5), the overpower protecting, monitoring circuit (11) connects the MSP432 processor
(6) a input terminal；
The input terminal of the discharge resistance (14) connects an output end of the second order filter (3), the discharge resistance (14)
Output end connect the source electrode of the metal-oxide-semiconductor (15), the drain electrode of the metal-oxide-semiconductor (15) connects the defeated of the second order filter (3)
Enter end, the grid of the metal-oxide-semiconductor (15) connects an input terminal of the MSP432 processor (6)；
The battery management system (9) is parallel with the second capacitor (17), and one end of second capacitor (17) connects the two or two pole
The cathode of (18) is managed, the anode of second diode (18) connects the cathode of the first diode (13), second electricity
The other end for holding (17) connects the input terminal of the second order filter (3)；
One output end of the battery management system (9) connects the input terminal of the battery voltage sampling circuit (12), the electricity
Another output end of pond management system (9) connects the input of the system capacity control circuit (10) by first switch (19)
End, the first switch (19) also connect one end of the first capacitor (16), the cell voltage by second switch (20)
The output end of sample circuit (12) connects an input terminal of the MSP432 processor (6).
3. the induction according to claim 2 based on line load electric current takes electrical measuring systems, it is characterised in that: the mistake
Power protecting, monitoring circuit (11) includes voltage monitoring comparator, and the input terminal of the voltage monitoring comparator connects the energy
Another input terminal of the output end of control circuit (10), the voltage monitoring comparator connects the defeated of the second order filter (3)
Outlet, the output end of the voltage monitoring comparator connect an input terminal of the MSP432 processor (6).
4. the induction according to claim 3 based on line load electric current takes electrical measuring systems, it is characterised in that: the electricity
Pressure detection circuit (7) includes sequentially connected first resistor bleeder circuit (21), first voltage sampling isolator (22), and described the
The input terminal of one resistor voltage divider circuit (21) connects the second pipe of the full-wave rectification bridge (2) by the second order filter (3)
The output end of foot (23), first voltage sampling isolator (22) connects the input terminal of the MSP432 processor (6).
5. the induction according to claim 4 based on line load electric current takes electrical measuring systems, it is characterised in that: the electricity
Net quality detection circuitry (8) includes being sequentially connected second resistance bleeder circuit (24), second voltage sampling isolator (25), described
Two input terminals of second resistance bleeder circuit (24) are separately connected the both ends of the CT electricity getting device (1).
6. the induction according to claim 5 based on line load electric current takes electrical measuring systems, it is characterised in that: the CT
The both ends of electricity getting device (1) are separately connected the first pin (26) and third pin (27) of the full-wave rectification bridge (2)；The all-wave
The second pin (23) of rectifier bridge (2) connects input terminal and the institute of the discharge resistance (14) by the second order filter (3)
State the input terminal of first diode (13)；The output end of the discharge resistance (14) connects the input terminal of the metal-oxide-semiconductor (15), institute
The output end for stating metal-oxide-semiconductor (15) connects the 4th pin (28) of the full-wave rectification bridge (2) by the second order filter (3).
7. the induction according to claim 6 based on line load electric current takes electrical measuring systems, it is characterised in that: CT takes electricity
Relay protector is connected between device (1) and the MSP432 processor (6).
8. the induction according to claim 7 based on line load electric current takes electrical measuring systems, it is characterised in that: the CT
Electricity getting device is made of nanocrystalline material coil, using double opening structures.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593993A (en) * | 2018-07-03 | 2018-09-28 | 深圳市惠立智能电力科技有限公司 | Induction based on line load electric current takes electrical measuring systems |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593993A (en) * | 2018-07-03 | 2018-09-28 | 深圳市惠立智能电力科技有限公司 | Induction based on line load electric current takes electrical measuring systems |
| CN108593993B (en) * | 2018-07-03 | 2024-06-18 | 刘欣然 | Inductive electricity acquisition measuring system based on line load current |
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