CN207114694U - The current break triggers circuit of fault detector and its collecting unit - Google Patents
The current break triggers circuit of fault detector and its collecting unit Download PDFInfo
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- CN207114694U CN207114694U CN201721047084.XU CN201721047084U CN207114694U CN 207114694 U CN207114694 U CN 207114694U CN 201721047084 U CN201721047084 U CN 201721047084U CN 207114694 U CN207114694 U CN 207114694U
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Abstract
The utility model provides a kind of current break triggers circuit of fault detector and its collecting unit by setting up maximum power point voltage observation circuit for the collecting unit of the fault detector, coordinate corresponding pulse generating circuit, current break triggers circuit is formed, the primary side current mutation of circuit where being monitored by the current break triggers circuit and judging the fault detector collecting unit.After primary side current mutation is detected, the rear class control circuit in the fault detector collecting unit is waken up, responds and reports Guangdong power system.Current break triggers circuit has very high detection sensitivity and real-time used by the utility model, therefore rear class control circuit can be closed when line current is relatively low, reduces power consumption.The utility model on the premise of fault detect real-time and accuracy is not influenceed, can strictly limit the power consumption of the fault detector, reduce loss, increase the service life, while wrong report when can also solve the problems, such as powered installation.
Description
Technical field
It the utility model is related to the current break of a kind of fault detector, more particularly, to fault detector collecting unit
Triggers circuit.
Background technology
Fault detector in existing power information collection network, larger circuit or long-time are fluctuated in daily load
In underload (load current I<In circuit 5A), the energy obtained by its collecting unit power-supply circuit is unstable or not
It is enough to provide the fault detector normal work, often providing power supply by lithium battery supports.It is chronically at and this pays no attention to
The fault detector under load is thought, because it excessively relies on lithium battery power supply, it is then desired to often be carried out to its built-in lithium battery
Change, and for the fault detector of encapsulating encapsulation, due to non-dismountable, the fault detector that can only more renew.So understand
Have a strong impact on the effective utilization of fault detector under the scene.
At present, solved for this problem, generally use two ways：
1. increase lithium battery capacity.It although such a method can increase the service life, can also ensure dependable performance, can increase
Oil (gas) filling device cost.Moreover, the increase of lithium battery capacity and the additional weight that brings, can be tight for fault detector circuit
Ghost image rings the reliability of its installation.
2. inner function circuit discontinuous operation.Although such a method can keep more long-lived under less battery capacity
Life, does not increase hardware cost and nor affects on fault detector own wt, it can be difficult to ensureing the performance of fault detector.If
Break down when standby, be then difficult to find, often break down situation about not reporting.This mode can also in powered installation
Because current break causes wrong report.It is such a to do especially in some particular applications, such as transient state recording type fault detector
Method can not catch failure exactly and point occurs, and the waveform of admission has phase delay.Especially its caused phase delay may be by
Reach one or even several cycles in the reason for discontinuous operation, have a strong impact on the real-time of recording.
Especially for transient state recording type fault detector.Its for earth fault collecting unit not locally judged,
But the waveform of admission is uploaded into main website, sentenced by main website according to the wave character of four cycles and rear eight cycles before trouble point
Break and earth fault type.It is very high for the requirement of real-time of collecting unit because failure occurs at random.Once it can not implement to adopt
Collect failure and catch failure exactly and point occurs, its waveform enrolled will be caused phase delay to be present.The phase delay will
The judgement for fault type is caused to go wrong, in some instances it may even be possible to which break down situation about not reporting.
But the existing technology for this fault detector, once ensure that it enrolls the real-time of waveform, it will necessarily need
Will higher power consumption run with holding equipment.So, because the limitation of lithium battery, the service life of its collecting unit can not then obtain
To guarantee.
In addition, according to fault detector it is nationwide using experience accumulation from the point of view of, traditional fault detector is powered
The situation of wrong report occurs in installation, and this is not allowed to.But if having a power failure installation, then when can lose economic benefit and construct
Between controlled, be unfavorable for constructing on a large scale.
Therefore, it is badly in need of a kind of technical scheme at present, to solve existing fault detector, especially transient state recording type failure refers to
Show the real-time of device and the contradiction of service life.
The content of the invention
In order to solve the shortcomings of the prior art, the purpose of this utility model is to provide a kind of fault detector collection
The current break triggers circuit of unit, Guangdong power system is monitored by the current break triggers circuit in real time, strict limitation
The power consumption of the fault detector, loss is reduced, extends the service life of the fault detector, while can also solve failure
Wrong report problem during the powered installation of indicator.
To achieve the above object, the utility model provides a kind of current break for fault detector collecting unit first
Triggers circuit, the collecting unit use current transformer, it is characterised in that the current break triggers circuit includes order and connected
Maximum power point voltage observation circuit, driving gate circuit and the pulse generating circuit connect；The output of the pulse generating circuit
Hold the output end overall as the current break triggers circuit；
The input overall as the current break triggers circuit of the input of the maximum power point voltage observation circuit
End, connect the output end of the current transformer.
Wherein, the maximum power point voltage observation circuit, including the bandpass filtering being made up of discrete resistors, capacity cell
Network, and the late-class circuit with the bandpass filtering network connection；
The band logical frequency of the bandpass filtering network is the characteristic frequency of line fault signal,
The late-class circuit receives the line fault signal, and exports.
Wherein, the pulse generating circuit, is made up of discrete component, for nursing one's health maximum power point voltage observation circuit hair
The signal brought, screened according to the feature of line fault, to be constant when judging that line work is normal according to the selection result
Level, when judging line failure, level is overturn, and starting single-chip microcomputer by external interrupt runs.
Further, in above-mentioned current break triggers circuit, in order to solve the problems, such as powered installation false triggering, it further comprises electricity
Press comparator；The input of the voltage comparator connects the voltage output end of the maximum power point voltage observation circuit, institute
State reference voltage input connection any of REF33XX family chips of voltage comparator, the voltage comparator it is defeated
Go out the control terminal of the end connection driving gate circuit.
Specifically, the REF33XX family chips output end output reference voltage, the reference voltage is that the failure refers to
The drift voltage of the current transformer output end output when primary side current of circuit is 0 where showing device collecting unit.
Further, in above-mentioned current break triggers circuit, in addition to RC delay circuits, the RC delay circuits are series at
Between the output end of the voltage comparator and the control terminal of the driving gate circuit.
Specifically, the delay time of above-mentioned RC delay circuits is 3 seconds, as shown in fig. 6, will in order to solve fault detector
Line current fluctuation, which is mistaken for circuit, electricity.
Further, based on above-mentioned current break triggers circuit, the utility model also provides a kind of fault detector, bag
Include power taking unit, electric power management circuit, battery unit, charging circuit and rear class control circuit, it is characterised in that the power taking
The output end of the input connection current transformer of unit, the output end of the power taking unit connect the current break triggering electricity
The input on road, the output end of the current break triggers circuit connect the rear class control circuit；
The output end of the power taking unit connects the electric power management circuit simultaneously；The electric power management circuit connects simultaneously
And control the battery unit and the charging circuit；The electric power management circuit is also connected with the rear class control circuit,
Powered for the rear class control circuit.
Further, in above-mentioned fault detector, the electric power management circuit include power network line load decision circuitry and
Control gate circuit：
The power network line load decision circuitry passes through the control door electricity when power network line load is less than given threshold
Road starts the battery unit power supply；Powered when power network line load is more than the given threshold by the power network line,
And the charging circuit is started by the control gate circuit, using the power surplus of the power network line as in the charging circuit
Energy storage device charging.
Further, in above-mentioned fault detector collecting unit, the power taking unit also includes impedance matching circuit, adopts
Collect unit if it is intended to obtaining longer service life, on the one hand it, is exactly on the other hand to improve CT as far as possible to reduce power consumption to be
Power taking efficiency, theoretical according to maximum power transfer, when load impedance and singal source resistance conjugate impedance match, load can obtain
Peak power, so improving CT power taking efficiency, it is easiest to realize and most economical method is exactly match CT secondary coils interior
Resistance and the impedance of load.Specifically, the impedance matching circuit is by the impedance adjusting network of resistance, electric capacity and switch connection, institute
State the impedance value of impedance adjusting network and the impedance conjugate impedance match of the collecting unit output end.
The utility model is compared with existing scheme with as follows:
1. the utility model sets up maximum power point voltage observation circuit for the collecting unit of the fault detector.With institute
State maximum power point voltage observation circuit and coordinate corresponding pulse generating circuit, form current break triggers circuit.Pass through the electricity
The primary side current mutation of circuit where stream mutation triggers circuit monitors and judges the fault detector collecting unit.Detecting
After being mutated to primary side current, the rear class control circuit in the fault detector is waken up, responds and reports Guangdong power system.
Current break triggers circuit has very high a detection sensitivity and real-time used by due to the utility model, therefore can be
Rear class control circuit is closed when line current is relatively low, reduces power consumption.The utility model can not influence fault detect real-time
On the premise of accuracy, the power consumption of the fault detector is strictly limited, loss is reduced, increases the service life.
2. further, the utility model is provided with voltage comparator in the current break triggers circuit, by the voltage
The reference voltage of comparator is set as CT output end drift voltages during line current I=0.Locked when primary side current is 0
The control terminal of the driving gate circuit, keep the driving gate circuit to close, the rear class control circuit can not be started.And then
The utility model can avoid the occurrence of wrong report in the powered installation fault detector.
3. further, the utility model also RC delay circuits are series at the output end of the voltage comparator with it is described
Between the control terminal for driving gate circuit.When detecting that the current transformer primary side current is non-zero, postpone 3 seconds, then unlock institute
Driving gate circuit is stated, recovers the driving to rear class control circuit.It is further ensured that the accuracy of fault detect.
Other features and advantages of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or by implement the present invention and understand.
Brief description of the drawings
Accompanying drawing is used for providing and further understanding to of the present utility model, and a part for constitution instruction, and with this reality
With new embodiment together, for explaining the utility model, do not form to limitation of the present utility model.In the accompanying drawings：
Fig. 1 is the fault detector collecting unit circuit framework schematic diagram according to the utility model embodiment；
Fig. 2 is the fault detector collecting unit integrated circuit schematic diagram according to the utility model embodiment；
Fig. 3 is the signal according to the fault detector collecting unit current break triggers circuit of the utility model embodiment
Figure；
Fig. 4 is maximum power point voltage observation circuit in the current break triggers circuit according to the utility model embodiment
Structure chart；
Fig. 5 is the structure chart of pulse generating circuit in the current break triggers circuit according to the utility model embodiment；
Fig. 6 is the structure chart of RC delay circuits in the current break triggers circuit according to the utility model embodiment；
Fig. 7 is the schematic diagram according to the power taking unit middle impedance match circuit of the utility model embodiment.
Embodiment
Preferred embodiment of the present utility model is illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein excellent
Select embodiment to be merely to illustrate and explain the utility model, be not used to limit the utility model.
Fig. 1 is whole corresponding to it according to fault detector collecting unit circuit framework schematic diagram of the present utility model, Fig. 2
Body circuit diagram.As shown in figure 1, fault detector collecting unit of the present utility model, including power taking unit, power management electricity
Road, battery unit, charging circuit and rear class control circuit, it is characterised in that the input connection electric current of the power taking unit
The output end of transformer, the output end of the power taking unit connect the input of the current break triggers circuit, the electric current
The output end for being mutated triggers circuit connects the rear class control circuit；
The power taking unit uses current transformer (CT), and its output end connects the electric power management circuit simultaneously；It is described
Electric power management circuit connects and controls the battery unit and the charging circuit simultaneously；The electric power management circuit also with institute
The connection of rear class control circuit is stated, is powered for the rear class control circuit.
Current transformer (CT) is the most frequently used sensor of power line observation circuit.Collecting unit is if it is intended to obtain longer
Service life, reduce power consumption be on the one hand, on the other hand be exactly as far as possible improve CT power taking efficiency.According to peak power
Transmission theory, when load impedance and singal source resistance conjugate impedance match, load can obtain peak power, so improving taking for CT
Electrical efficiency, is easiest to realize and most economical method is exactly the impedance for matching the internal resistance of CT secondary coils and loading.Current Mutual Inductance
For device (CT) in the case of primary side current constant magnitude, its peak power output depends on CT material and structure.This implementation
The circuit of collecting unit, by adjusting the matching of circuit direct impedance (referring to Fig. 7), optimizes CT work(according to CT this characteristic in example
Rate point, realizes optimal output, makes CT real output ≈ peak power outputs, reduces secondary loss as far as possible, improves power taking
Efficiency, extend the service life of fault detector collecting unit.Therefore, the impedance matching circuit in the power taking unit, specifically
For by the impedance adjusting network of resistance, electric capacity and switch connection, the impedance value of the impedance adjusting network and the collecting unit
The impedance conjugate impedance match of output end.
Current transformer (CT) has following characteristic：Its maximum power point voltage is with open-circuit voltage Ratio invariableness not with once
Side curent change.When primary side current is undergone mutation, the open-circuit voltage of current transformer can undergo mutation, so as to which it is maximum
Power point voltage can also produce mutation therewith.Due to maximum power point voltage and open-circuit voltage Ratio invariableness, current break triggering
Circuit is according to this characteristic, as long as constantly monitoring whether maximum power point voltage changes by hardware circuit, it is possible to
Judge whether the electric current of power network line undergos mutation.In the event of mutation, rear class control is just waken up in a manner of impulse level
Circuit full speed operation, so as to which rear class control circuit be freed, rear class control circuit is write from memory when power network line load is smaller
Recognize the operational mode for being arranged to extremely low power dissipation state or extremely light task into complete dormancy, so that it may effectively reduce complete machine work(
Consumption, extend the service life of fault detector collecting unit.It is additionally, since that current break triggers circuit power consumption is extremely low and sensitivity
Higher, this design can also be further ensured that the accuracy that point is caught occurs for failure.
Further, in above-mentioned fault detector, the power management electricity includes power network line load decision circuitry and control
Gate circuit processed：
The power network line load decision circuitry passes through the control door electricity when power network line load is less than given threshold
Road starts the battery unit power supply；Powered when power network line load is more than the given threshold by the power network line,
And the charging circuit is started by the control gate circuit, using the power surplus of the power network line as in the charging circuit
Energy storage device charging.
Further, in above-mentioned fault detector collecting unit, the power taking unit also includes impedance as shown in Figure 7
Match circuit.Fault detector collecting unit obtains energy by way of CT electromagnetic induction from power network line, realizes power taking, this
When the problem of relating to power taking efficiency.If CT power points can not be optimized to realize optimal output, CT real outputs ≠
Peak power output, it will result in secondary loss.This is unfavorable for the service life for extending fault detector.And this practicality
New provided collecting unit, it can realize impedance matching by adjusting inherent parameters, optimize CT power points, realize faint
Collection of energy is simultaneously optimal output.The faint collection of energy mode that the present embodiment is provided can make CT real outputs ≈
Peak power output, secondary loss being reduced as far as possible, improving power taking efficiency, extend fault detector collecting unit uses the longevity
Life.
Specifically, in above-mentioned fault detector, the current break triggers circuit of collecting unit is as shown in Figure 3.The electric current
Mutation triggers circuit includes the maximum power point voltage observation circuit, driving gate circuit and pulse generating circuit being linked in sequence；
The output end of the pulse generating circuit output end overall as the current break triggers circuit；
The maximum power point voltage observation circuit includes the bandpass filtering network being made up of discrete resistors, capacity cell,
And the late-class circuit with the bandpass filtering network connection；The band logical frequency of the bandpass filtering network is line fault signal
Characteristic frequency, the late-class circuit receives the line fault signal, and exports.Its input touches as the current break
The overall input of Power Generation Road, connect the output end of the current transformer.
Referring in particular to Fig. 4, the maximum power point voltage observation circuit in above-mentioned current break triggers circuit, by discrete component
Form, remember current maximum power point voltage, when maximum power point voltage change reaches fault signature, after being signaled to
Level circuit；Because mutual inductance phenomenon follows the Ferrari law of electromagnetic induction and Lenz's law, so when line current is undergone mutation,
CT open-circuit voltage necessarily changes, according to this rule of maximum power point voltage and open-circuit voltage Ratio invariableness, maximum work
Rate point voltage is necessarily changed, and an AC compounent can be now superimposed on the maximum power point voltage signal of memory, is passed through
Bandpass filtering network, after filtering out the signal for not meeting line fault feature, output signal to late-class circuit
Referring in particular to Fig. 5, the pulse generating circuit in above-mentioned current break triggers circuit, it is made up of, is used for discrete component
The signal that conditioning maximum power point voltage observation circuit sends over, is screened according to the feature of line fault, according to screening
It is constant level when result judgement line work is normal, when judging line failure, level is overturn, and passes through external interrupt
Start single-chip microcomputer operation.
Further, in above-mentioned current break triggers circuit, in addition to voltage comparator；
The input of the voltage comparator connects the voltage output end of the maximum power point voltage observation circuit, described
Any of reference voltage input connection REF33XX family chips of voltage comparator, the output of the voltage comparator
The control terminal of the end connection driving gate circuit.
Specifically, the reference voltage of the voltage comparator is to be produced by TI REF33XX family chips, it is line current
CT output end drift voltages during I=0.Such design be in order to power network line electric current is zero when the correlated characteristic that shows
Parameter is evaded --- if hardware circuit judges that primary side current is zero by monitoring maximum power point voltage, just locks
Wake-up pulse generating loop, the now mutation if primary side current is started from scratch, because wake-up pulse is locked, would not wake up
Rear class control circuit.In this way, the problem of being reported by mistake when the utility model can efficiently solve powered installation.
Further, in above-mentioned current break triggers circuit, in addition to RC delay circuits.Reference picture 6, the RC delays electricity
Road is series between the output end of the voltage comparator and the control terminal of the driving gate circuit.When hardware circuit passes through monitoring
When maximum power point voltage judges that primary side current is not zero, immediately pass through RC circuits and carry out delay monitoring, if primary side
The electric current state of being not zero continues 3 seconds, just unlocks wake-up pulse and circuit occurs.
Specifically, the delay time of above-mentioned RC delay circuits is 3 seconds.
The course of work of the system is exemplified below：
Power-supply circuit can obtain energy by way of electromagnetic induction from power network line；Electric power management circuit is responsible for integration
The energy of system components, including lithium battery, faint energy collection circuit (the power taking electricity i.e. in the present embodiment in battery unit
Road) and power surplus the energy that is provided of storage circuit (energy storage is realized by charging circuit in the present embodiment)；Electric current is dashed forward
Become triggers circuit by monitoring the state of Acquisition Circuit in real time, to determine whether there occurs the situation of high current mutation, and pass through
Impulse level wakes up rear class control circuit full speed operation.
Big circuit is fluctuated for daily load, in power network line load current I ＞ 5A, faint energy collection circuit is adopted
The energy of collection is integrated by electric power management circuit and used to rear class control circuit, supports the work of whole system --- including mutation
Current triggering circuit and rear class control circuit, and in the case where ensureing whole system reliably working, energy more than needed is deposited
Storage is got up.Now lithium battery is disconnected by electric power management circuit, is not involved in work.
In power network line load current I ＜ 5A, the energy of faint energy collection circuit collection quite faint (1mW
Below), system work can not have individually been supported.Now electric power management circuit can receive the power surplus of storage and faint energy
The energy of collector collection is integrated together to be used to rear class control circuit.Because daily load period of waves is 12h, it is contemplated that deposit
The power surplus of storage is limited, and the electric power management circuit should not allow lithium battery to participate in work as far as possible.Now rear class control circuit
Complete resting state will be entered, only mutation current triggers circuit keeps work.When failure carrys out interim, mutation current triggers circuit
An impulse level is sent at once to wake up rear class control circuit full speed operation.It can so ensure that the standard that point is caught occurs for failure
True property.
For long-time load relatively low (I ﹤ 5A) circuit, the energy of faint energy collection circuit collection is quite faint
(below 1mW), system work can not have individually been supported.The power surplus now stored is also fairly limited, electric power management circuit
The energy that the energy of lithium battery and faint energy collection circuit gather can be integrated together and be used to rear class control circuit.In order to drop
The loss of low lithium battery, when rear class control circuit monitors that primary side current is less than 5A, will enter complete resting state or
The operational mode of extremely light task, only mutation current triggers circuit continuous firing.Only when failure carrys out interim, mutation current triggering
Circuit just understands trigger pulse level, wakes up rear class control circuit full speed operation.It can so ensure that the accurate of point seizure occurs for failure
Property both effective cooperation, can on the circuit that such as daily load fluctuates big circuit, long-time load relatively low (I ﹤ 5A)
Ensure the stability of fault detector collecting unit service life and function by ground.
The utility model improves power taking efficiency by the impedance matching of power-supply circuit (uW/mW ranks), then by with electric current
The effectively cooperation of triggers circuit is mutated, the power taking effect of fault detector collecting unit is improved on the basis of dependable performance is ensured
Rate and Overall Power Consumption is reduced, solves the problems, such as that both life-span and performance that fault detector runs into practice balance.
The fault detector that the present embodiment is provided, in the case of primary side (circuit) electric current relatively low (Imin=5A) i.e.
The full speed operation of fault detector collecting unit can be achieved.By the cooperation of mutation current triggers circuit, the present embodiment can be one
In the case of secondary line electric current extremely low (I ﹤ 5A), the number of rear class control circuit task is reduced by current break triggers circuit
Amount, the operational mode of the extremely light task of entrance, reduce power consumption；Ensure the real-time of system by mutation current triggers circuit simultaneously.
According to actual measurement, the power consumption of whole mutation current triggers circuit is below 4.5uA@3V, relative to rear class control circuit full speed operation
The energy saved is considerable.
The utility model solves the problems, such as both the life-span that fault detector runs into practice and performance balance,
Both longer service life had been ensure that, in turn ensure that the reliability of performance；Difficulty of construction can be reduced with powered installation.
One of ordinary skill in the art will appreciate that：Preferred embodiment of the present utility model is the foregoing is only, and
Limitation the utility model is not used in, although the utility model is described in detail with reference to the foregoing embodiments, for ability
For the technical staff in domain, its technical scheme that can be still recorded to foregoing embodiments is modified, or to its middle part
Technical characteristic is divided to carry out equivalent substitution.All any modifications within the spirit and principles of the utility model, made, equally replace
Change, improve, should be included within the scope of protection of the utility model.
Claims (9)
1. a kind of current break triggers circuit for fault detector collecting unit, the collecting unit uses Current Mutual Inductance
Device, it is characterised in that the current break triggers circuit includes maximum power point voltage observation circuit, the driving gate being linked in sequence
Circuit and pulse generating circuit；The output end of the pulse generating circuit is defeated as current break triggers circuit entirety
Go out end；
The input of the maximum power point voltage observation circuit input overall as the current break triggers circuit, even
Connect the output end of the current transformer.
2. it is used for the current break triggers circuit of fault detector collecting unit as claimed in claim 1, it is characterised in that institute
State maximum power point voltage observation circuit, including the bandpass filtering network being made up of discrete resistors, capacity cell, and with it is described
The late-class circuit of bandpass filtering network connection；
The band logical frequency of the bandpass filtering network is the characteristic frequency of line fault signal,
The late-class circuit receives the line fault signal, and exports.
3. it is used for the current break triggers circuit of fault detector collecting unit as claimed in claim 2, it is characterised in that also
Including voltage comparator；
The input of the voltage comparator connects the voltage output end of the maximum power point voltage observation circuit, the voltage
Any of reference voltage input connection REF33XX family chips of comparator, the output end of the voltage comparator connects
Connect the control terminal of the driving gate circuit.
4. it is used for the current break triggers circuit of fault detector collecting unit as claimed in claim 3, it is characterised in that institute
REF33XX family chip output end output reference voltages are stated, the reference voltage is fault detector collecting unit place
The drift voltage of the primary side current of circuit current transformer output end output when being 0.
5. it is used for the current break triggers circuit of fault detector collecting unit as claimed in claim 4, it is characterised in that also
Including RC delay circuits, the RC delay circuits are series at output end and the control of the driving gate circuit of the voltage comparator
Between end processed.
6. it is used for the current break triggers circuit of fault detector collecting unit as claimed in claim 5, it is characterised in that institute
The delay time for stating RC delay circuits is 3 seconds.
7. a kind of fault detector collecting unit based on current break triggers circuit as claimed in claim 1, including power taking list
Member, electric power management circuit, battery unit, charging circuit and rear class control circuit, it is characterised in that the power taking unit it is defeated
Enter the output end of end connection current transformer, the output end of the power taking unit connects the input of the current break triggers circuit
End, the output end of the current break triggers circuit connect the rear class control circuit；
The output end of the power taking unit connects the electric power management circuit simultaneously；The electric power management circuit is connected and controlled simultaneously
Make the battery unit and the charging circuit；The electric power management circuit is also connected with the rear class control circuit, for institute
State the power supply of rear class control circuit.
8. fault detector collecting unit as claimed in claim 7, it is characterised in that the power management electricity includes grid line
Road load decision circuitry and control gate circuit；
The power network line load decision circuitry is opened when power network line load is less than given threshold by the control gate circuit
The dynamic battery unit power supply；Powered, and led to by the power network line when power network line load is more than the given threshold
Cross the control gate circuit and start the charging circuit, using the power surplus of the power network line as the storage in the charging circuit
Can device charging.
9. fault detector collecting unit as claimed in claim 8, it is characterised in that the power taking unit also includes impedance
With circuit, the impedance matching circuit is by the impedance adjusting network of resistance, electric capacity and switch connection, the impedance adjusting network
Impedance value and the collecting unit output end impedance conjugate impedance match.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721047084.XU CN207114694U (en) | 2017-08-21 | 2017-08-21 | The current break triggers circuit of fault detector and its collecting unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721047084.XU CN207114694U (en) | 2017-08-21 | 2017-08-21 | The current break triggers circuit of fault detector and its collecting unit |
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| CN207114694U true CN207114694U (en) | 2018-03-16 |
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| CN201721047084.XU Active CN207114694U (en) | 2017-08-21 | 2017-08-21 | The current break triggers circuit of fault detector and its collecting unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579926A (en) * | 2020-05-22 | 2020-08-25 | 东北电力大学 | Distributed power fault positioning method for power distribution network |
| CN113721108A (en) * | 2021-07-13 | 2021-11-30 | 深圳市科陆电子科技股份有限公司 | Acquisition equipment, low-power-consumption control method and transient recording type fault indicator |
-
2017
- 2017-08-21 CN CN201721047084.XU patent/CN207114694U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579926A (en) * | 2020-05-22 | 2020-08-25 | 东北电力大学 | Distributed power fault positioning method for power distribution network |
| CN113721108A (en) * | 2021-07-13 | 2021-11-30 | 深圳市科陆电子科技股份有限公司 | Acquisition equipment, low-power-consumption control method and transient recording type fault indicator |
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