CN106451363B - The protection circuit of reversible transducer and the electricity system with energy storage function - Google Patents
The protection circuit of reversible transducer and the electricity system with energy storage function Download PDFInfo
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- CN106451363B CN106451363B CN201610840096.1A CN201610840096A CN106451363B CN 106451363 B CN106451363 B CN 106451363B CN 201610840096 A CN201610840096 A CN 201610840096A CN 106451363 B CN106451363 B CN 106451363B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/22—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
- H03K5/24—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being amplitude
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of protection circuit of reversible transducer and with the electricity system of energy storage function.Wherein, which is applied to the electricity system with energy storage function, comprising: single supply sample circuit is connect with the reversible transducer in the electricity system, for acquiring the first voltage signal of the reversible transducer；Coagulation circuit is connect with the single supply sample circuit, for carrying out signal processing to the first voltage signal, obtains second voltage signal；Comparison circuit exports comparison result signal for being compared to reference voltage signal with the second voltage signal with the coagulation circuit connection；Two stage treatment circuit is connect with the comparison circuit, for executing protection act according to the comparison result signal.The present invention solves the technical problem of the protection circuit complexity of reversible transducer in the electricity system with energy-storage function.
Description
Technical field
The present invention relates to power domains, protection circuit in particular to a kind of reversible transducer and with energy storage function
Electricity system.
Background technique
Reversible transducer is mainly used in the electricity system with energy-storage function, as shown in Figure 1, this kind of electricity system is main
Including power-supply system 11, electricity system 12, reversible transducer 13 and energy-storage system 14, wherein reversible transducer is that energy converts pivot
Knot.When 11 output power of power-supply system is higher than load requirement, (reversible transducer as shown in Figure 2 works in the signal of charge mode
Figure) when, energy is stored in energy-storage system 14 by extra energy by reversible transducer 13, and reversible transducer 13, which works in, to be filled
Power mode, referring to fig. 2, arrow direction are direction of current flow；When 11 generated output of power-supply system is insufficient or power down, energy storage
System 14 can be released energy by reversible transducer 13, to maintain the normal power supply of electricity system 12, two-way changing
Device 13 works in discharge mode, and referring to Fig. 3, arrow direction is direction of current flow.
It can be seen that reversible transducer is to be changed in the case where keeping both end voltage polarity constant according to application demand
Current direction, realizes the two-way flow of energy, and in existing reversible transducer, current foldback circuit is complicated, cumbersome, and due to
The two-way flow of electric current needs dual power supply (i.e. positive-negative power) to power, and increases power system design difficulty.
For the problem of the protection circuit complexity of reversible transducer in the above-mentioned electricity system with energy-storage function, at present still
It does not put forward effective solutions.
Summary of the invention
The embodiment of the invention provides a kind of protection circuit of reversible transducer and with the electricity system of energy storage function, so that
The technical problem of few protection circuit complexity for solving reversible transducer in the electricity system with energy-storage function.
According to an aspect of an embodiment of the present invention, a kind of protection circuit of reversible transducer is provided, applied to having
The electricity system of energy storage function, comprising: single supply sample circuit connect with the reversible transducer in the electricity system, is used for
Acquire the first voltage signal of the reversible transducer；Coagulation circuit is connect with the single supply sample circuit, for pair
The first voltage signal carries out signal processing, obtains second voltage signal；Comparison circuit connects with the coagulation circuit
It connects, for being compared to reference voltage signal with the second voltage signal, exports comparison result signal；Two stage treatment electricity
Road is connect with the comparison circuit, for executing protection act according to the comparison result signal.
Further, the coagulation circuit includes: the first low-pass filter, is connected with the single supply sample circuit
It connects, for filtering the high-frequency signal in the first voltage signal, obtains the first trap signal；Voltage follower, with described
The connection of one low-pass filter obtains the second voltage signal for carrying out impedance matching to first trap signal.
Further, the voltage follower includes: operational amplifier, the inverting input terminal of the operational amplifier with it is defeated
Outlet connection, the inverting input terminal of the operational amplifier are connect with the output end of the low-pass filter；The operation amplifier
Output end of the output end of device as the coagulation circuit, for exporting the second voltage signal.
Further, the comparison circuit includes: first comparator, and inverting input terminal is for inputting the first reference voltage letter
Number, non-inverting input terminal is connect with the output end of the coagulation circuit, and the non-inverting input terminal is for inputting second electricity
Signal is pressed, output end is for inputting the first comparison signal；Second comparator, non-inverting input terminal is for inputting the second reference voltage letter
Number, inverting input terminal is connect with the output end of the coagulation circuit, and the inverting input terminal is for inputting second electricity
Signal is pressed, output end is for exporting the second comparison signal, wherein the reference voltage signal includes the first reference voltage letter
Number and second reference voltage signal, first comparison signal and second comparison signal are connected to and export the ratio together
Compared with consequential signal.
Further, the comparison circuit further include: first resistor is serially connected in the generation of first reference voltage signal
Between the output end of circuit and the inverting input terminal of the first comparator；Second resistance is serially connected in the coagulation circuit
Between the non-inverting input terminal of the first comparator；3rd resistor is serially connected in the coagulation circuit and described second and compares
Compared between the inverting input terminal of device；4th resistance, be serially connected in the output end of the generative circuit of second reference voltage signal with
Between the non-inverting input terminal of second comparator.
Further, the first resistor is identical with the second resistance resistance value, the 3rd resistor and the 4th electricity
The resistance value of resistance is identical.
Further, the comparison circuit further include: the 5th resistance, one end are connect with DC power supply；Described first compares
The output end of device and second comparator is connected to first node, and the second end of the 5th resistance is connected to the first segment
Point, the first node is for exporting the comparison result signal.
Further, the two stage treatment circuit includes: the second low-pass filter, is connected with the output end of the comparison circuit
It connects, for being filtered to the comparison result signal, obtains protection and judge signal；Execution circuit, with second low pass filtered
Wave device connection, for judging that signal executes protection act according to the protection.
Further, the execution circuit includes: processor, is connect with second low-pass filter, for described
It in the case that protection judges signal for high level signal, determines that the reversible transducer is in normal condition, it is dynamic not to execute protection
Make；In the case where the protection judges signal for low level signal, determines that the reversible transducer is in over-current state, execute
Protection act.
Further, the single supply sample circuit is at least one following: current sensor, voltage sensor and sampling
Resistance.
According to another aspect of an embodiment of the present invention, a kind of electricity system with energy storage function is additionally provided, the electricity consumption system
System moves reversible transducer to protect circuit.
Through the foregoing embodiment, using the first voltage signal of single supply sample circuit acquisition reversible transducer, in level-one
After processing circuit handles it, second voltage signal is obtained.Comparison circuit believes reference voltage signal and second voltage
It number is compared, exports comparison result signal, two stage treatment circuit determines whether need according to a comparison result signal of output
Execute protection act.In this scenario, the voltage signal that reversible transducer is acquired using single supply sample circuit, without
Using dual power supply is arranged in the protection circuit, the purpose of protection is can be realized in setting single supply；In addition, in this scenario, utilizing
One output signal can realize the duplicate protection of electric current forward direction overcurrent and reverse overcurrent.Through the foregoing embodiment, can make
The protection to reversible transducer is realized with simply protection circuit, solves the electricity system for having energy-storage function in the prior art
The problem of the protection circuit complexity of middle reversible transducer.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the electricity system according to an embodiment of the present invention with energy-storage function；
Fig. 2 is the schematic diagram that reversible transducer according to an embodiment of the present invention works in charge mode；
Fig. 3 is the schematic diagram that reversible transducer according to an embodiment of the present invention works in discharge mode；
Fig. 4 is the schematic diagram of reversible transducer hardware composition according to an embodiment of the present invention；
Fig. 5 is the current foldback circuit schematic diagram of reversible transducer according to an embodiment of the present invention；
Fig. 6 is status diagram when reversible transducer according to an embodiment of the present invention works in charging overcurrent；
Fig. 7 is status diagram when reversible transducer according to an embodiment of the present invention works in electric discharge overcurrent.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
The embodiment of the invention provides a kind of protection circuit of reversible transducer, which is applied to have storage function
Can electricity system, hardware composition as shown in figure 4, single supply sample circuit 41, coagulation circuit 43, comparison circuit 45 with
And two stage treatment circuit 47.
Single supply sample circuit 41 is connect with the reversible transducer in electricity system, for acquiring the of reversible transducer
One voltage signal.Single supply sample circuit 41 can use current sensor, voltage sensor and sampling resistor current sensor
In at least one sensor.
Below by taking above-mentioned single supply sample circuit 41 is current sensor as an example, analyzed.Current sensor is using single
Power supply power supply, current sensor output are voltage signal and are positive.When input current is zero, current sensor output one
The bias voltage of definite value；When input current is positive (charge mode), sampling and outputting voltage is higher than bias voltage；Work as input
When electric current is reversed (discharge mode), sampling and outputting voltage is lower than bias voltage and is greater than zero.After current sensor is sampled
Obtained first voltage signal is transferred to coagulation circuit 43.
Coagulation circuit 43 is connect with single supply sample circuit, for carrying out signal processing to first voltage signal, is obtained
To second voltage signal.Coagulation circuit 43 includes the first low-pass filter and voltage follower.
Specifically, after above-mentioned first voltage signal being filtered out high-frequency signal by the first low-pass filter, then it is transferred to electricity
Pressure follows wherein, is improved by voltage follower to the input impedance of first voltage signal, and to first voltage signal
Input capacitance carries out smaller part reason, guarantees the precision of first voltage signal.It will finally be obtained after the processing of coagulation circuit 43
To second voltage signal be transferred to comparison circuit 45.
Comparison circuit 45, and coagulation circuit connection, for comparing reference voltage signal and second voltage signal
Compared with output comparison result signal.Comparison circuit includes first to compare electric appliance and second and compare electric appliance, respectively with the first reference voltage
Signal and the second reference voltage signal, are compared, and export comparison result signal.
Two stage treatment circuit 47, connect with comparison circuit, for executing protection act according to comparison result signal.
Specifically, after two stage treatment circuit 47, compared result signal is filtered above-mentioned comparison result signal, is obtained
Signal is judged to protection, judges that signal executes protection act further according to protection.That is, when comparison result signal is high level, it is double
Normal condition is worked in converter, system is failure to actuate；After comparison result signal becomes low level, that is, show reversible transducer
In over-current state, system enters guard mode.
Through the foregoing embodiment, using the first voltage signal of single supply sample circuit acquisition reversible transducer, in level-one
After processing circuit handles it, second voltage signal is obtained.Comparison circuit believes reference voltage signal and second voltage
It number is compared, exports comparison result signal, two stage treatment circuit determines whether need according to a comparison result signal of output
Execute protection act.In this scenario, the voltage signal that reversible transducer is acquired using single supply sample circuit, without
Using dual power supply is arranged in the protection circuit, the purpose of protection is can be realized in setting single supply；In addition, in this scenario, utilizing
One output signal can realize the duplicate protection of electric current forward direction overcurrent and reverse overcurrent.Through the foregoing embodiment, can make
The protection to reversible transducer is realized with simply protection circuit, solves the electricity system for having energy-storage function in the prior art
The problem of the protection circuit complexity of middle reversible transducer.
Above-described embodiment, by the Duplex treatment to sampled signal, when realizing the forward and reverse overcurrent of reversible transducer, to two
A over-current signal is uniformly processed.
Further, coagulation circuit includes: the first low-pass filter, connect, was used for single supply sample circuit
The high-frequency signal in first voltage signal is filtered, the first trap signal is obtained；Voltage follower is connect with the first low-pass filter,
For carrying out impedance matching to the first trap signal, second voltage signal is obtained.
In example as shown in Figure 5, the first low-pass filter is made of the 6th resistance R6 and first capacitor C1, for filtering
Except high-frequency signal.First voltage signal V1 is input to the non-inverting input terminal of operational amplifier Y1 after the first low-pass filter.
As shown in figure 5, voltage follower may include: operational amplifier Y1, the inverting input terminal of operational amplifier with it is defeated
Outlet connection, the inverting input terminal of operational amplifier and the output end of low-pass filter connect；The output end of operational amplifier is made
Current sample is improved using the voltage follower and is believed for exporting second voltage signal V2 for the output end of coagulation circuit
Number input impedance, reduce input capacitance, guarantee the precision of current sampling signal.
Further, in example as shown in Figure 5, comparison circuit may include: first comparator B1, and inverting input terminal is used
In inputting the first reference voltage signal Vref1, non-inverting input terminal is connect with the output end of coagulation circuit, and non-inverting input terminal is used
In input second voltage signal, output end is for inputting the first comparison signal；Second comparator B2, non-inverting input terminal is for inputting
Second reference voltage signal Vref2, inverting input terminal are connect with the output end of coagulation circuit, and inverting input terminal is for inputting
Second voltage signal, output end is for exporting the second comparison signal, and the inverting input terminal of first comparator is by the first reference voltage
It is accessed after signal concatenation first resistor R1；The non-inverting input terminal of second comparator concatenates the 4th resistance by the second reference voltage signal
It is accessed after R4.
Wherein, reference voltage signal includes the first reference voltage signal and the second reference voltage signal, the first comparison signal
Output comparison result signal together is connected to the second comparison signal.
Further, it can also include: first resistor R1 in comparison circuit shown in fig. 5, be serially connected in the first reference voltage
Between the output end of the generative circuit of signal and the inverting input terminal of first comparator；Second resistance R2, is serially connected in coagulation
Between circuit and the non-inverting input terminal of first comparator；3rd resistor R3 is serially connected in coagulation circuit and the second comparator
Between inverting input terminal；4th resistance R4 is serially connected in the output end of the generative circuit of the second reference voltage signal compared with second
Between the non-inverting input terminal of device.
Further, first resistor is identical with second resistance resistance value, and 3rd resistor is identical with the resistance value of the 4th resistance.Two
Comparator is all made of Differential Input mode, i.e. resistance is identical, inhibits common-mode signal for amplifying difference mode signal.
Further, comparison circuit further include: the 5th resistance R5, one end are connect with DC power supply VCC；First comparator and
The output end of second comparator is connected to first node, and the second end of the 5th resistance is connected to first node, and first node is used for
Export comparison result signal.First comparator is connect at first node with the second comparator, the first comparison signal and the second ratio
It pools together at first node compared with signal, and is passed to two stage treatment circuit through pull-up resistor at first node.
Specifically, as shown in figure 5, the current foldback circuit of reversible transducer mainly include prime signal processing circuit (such as
Coagulation circuit in above-described embodiment), the comparison circuit and rear class signal processing circuit that two comparators respectively constitute
(such as above-mentioned two stage treatment circuit).When reversible transducer works normally, the value of above-mentioned second voltage signal is between the first base
Between quasi- voltage signal and the second reference voltage signal, first comparator and the second comparator export high level (namely the simultaneously
One comparison signal and the second comparison signal are high level), comparison result signal is high level.
Specifically, as shown in fig. 6, above-mentioned second voltage signal is high when reversible transducer works in charging over-current state
In the first reference voltage signal, the inverting input terminal voltage of first comparator is higher than non-inverting input terminal voltage at this time, and first compares
The output of device becomes low level from high level, while by the output of the second comparator also clamper in low level, so comparison result
Signal becomes low level from high level.
Specifically, as shown in fig. 7, above-mentioned second voltage signal is low when reversible transducer works in electric discharge over-current state
In the second reference voltage signal, the non-inverting input terminal voltage of the second comparator is lower than inverting input terminal voltage at this time, and second compares
The output of device becomes low level from high level, while by the output of first comparator also clamper in low level, so comparison result
Signal becomes low level from high level.
Further, two stage treatment circuit includes: the second low-pass filter, connect, is used for the output end of comparison circuit
Compared result signal is filtered, and is obtained protection and is judged signal；Execution circuit is connect with the second low-pass filter, is used for root
Judge that signal executes protection act according to protection.In the example depicted in fig. 5, the second low-pass filter includes the 7th resistance R7 and the
Two capacitor C2.Output overcurrent protects voltage after comparison result finally low-pass filtered device filtering, which is reversible transducer
Overcurrent protection judge signal.
Further, execution circuit includes: processor, is connect with the second low-pass filter, for judging signal in protection
In the case where for high level signal, determines that reversible transducer is in normal condition, do not execute protection act；Signal is judged in protection
In the case where for low level signal, determines that reversible transducer is in over-current state, execute protection act.
It should be noted that single supply sample circuit is at least one following: current sensor, voltage sensor and sampling
Resistance.
On the other hand, the present invention also provides a kind of electricity systems with energy storage function, and the electricity system is with above-mentioned two-way
Converter carries out protection circuit.
Through the foregoing embodiment, the present invention realizes two-way change by a current sensor, one group of signal processing circuit
Overcurrent protection function when the forward and reverse operation of parallel operation.And the current foldback circuit output signal is level signal, anti-interference
By force, fast response time, and only one output signal is achieved that the duplicate protection of electric current forward direction overcurrent and reverse overcurrent, not only
It reduces costs, improves the reliability of system, and preferably work can be played in the case where I/O mouthfuls or less enabled control terminal
With.By the Duplex treatment to sampled signal, when realizing the forward and reverse overcurrent of reversible transducer, the unification to two over-current signals
Processing.
Current foldback circuit proposed by the invention is mainly used in electric current two-way flow occasion, naturally it is also possible to apply
In electric current one-way flow occasion.
In above-described embodiment, current sensor can also be exported using voltage-type output transducer using current mode
Sensor.
Further, current sample mode be not limited to current sensor sampling, can using resistance sampling and other
Sample mode；
Further, current sensor power supply mode is also not limited to single supply power supply, can use dual power supply, i.e.,
Generating positive and negative voltage power supply；
Further, over-current signal can be high level or low level, and the over-current signal of this programme is that low level is effective,
It can be using high level signal as overcurrent protection signal.
Through the foregoing embodiment, the present invention uses a current sensor, one group of signal processing circuit, realizes two-way change
Overcurrent protection function when the forward and reverse operation of parallel operation.And the current foldback circuit output signal is level signal, anti-interference
By force, fast response time, and only one output signal is achieved that the duplicate protection of electric current forward direction overcurrent and reverse overcurrent, not only
It reduces costs, improves the reliability of system, and preferably work can be played in the case where I/O mouthfuls or less enabled control terminal
With.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
In the above embodiment of the invention, it all emphasizes particularly on different fields to the description of each embodiment, does not have in some embodiment
The part of detailed description, reference can be made to the related descriptions of other embodiments.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, such as the division of unit, can be one kind
Logical function partition, there may be another division manner in actual implementation, such as multiple units or components can combine or can
To be integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Coupling, direct-coupling or communication connection can be through some interfaces, the indirect coupling or communication connection of unit or module,
It can be electrical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
On unit.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can for personal computer, server or network equipment etc.) execute each embodiment the method for the present invention whole or
Part steps.And storage medium above-mentioned includes: that USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic or disk etc. be various to can store program code
Medium.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of protection circuit of reversible transducer, which is characterized in that applied to the electricity system for having energy storage function, comprising:
Single supply sample circuit is connect with the reversible transducer in the electricity system, for acquiring the reversible transducer
First voltage signal；
Coagulation circuit is connect with the single supply sample circuit, for carrying out signal processing to the first voltage signal,
Obtain second voltage signal；
Comparison circuit is used to carry out reference voltage signal and the second voltage signal with the coagulation circuit connection
Compare, exports comparison result signal；
Two stage treatment circuit is connect with the comparison circuit, for executing protection act according to the comparison result signal；
Wherein, the two stage treatment circuit includes: the second low-pass filter, connect, is used for the output end of the comparison circuit
The comparison result signal is filtered, protection is obtained and judges signal, wherein second low-pass filter includes: the 7th
Resistance and the second capacitor；Execution circuit is connect with second low-pass filter, for judging that signal executes according to the protection
Protection act；The execution circuit includes: processor, is connect with second low-pass filter, for judging in the protection
In the case that signal is high level signal, determines that the reversible transducer is in normal condition, do not execute protection act；Described
In the case that protection judges signal for low level signal, determines that the reversible transducer is in over-current state, execute protection act；
Wherein, the power supply being arranged in the protection circuit is single supply.
2. protection circuit according to claim 1, which is characterized in that the coagulation circuit includes:
First low-pass filter is connect with the single supply sample circuit, for filtering the high frequency in the first voltage signal
Signal obtains the first trap signal；
Voltage follower is connect with first low-pass filter, for carrying out impedance matching to first trap signal, is obtained
To the second voltage signal.
3. protection circuit according to claim 2, which is characterized in that the voltage follower includes:
The inverting input terminal of operational amplifier, the operational amplifier is connect with output end, and the reverse phase of the operational amplifier is defeated
Enter end to connect with the output end of the low-pass filter；The output end of the operational amplifier is as the coagulation circuit
Output end, for exporting the second voltage signal.
4. protection circuit according to claim 1, which is characterized in that the comparison circuit includes:
First comparator, inverting input terminal is for inputting the first reference voltage signal, non-inverting input terminal and coagulation electricity
The output end on road connects, and the non-inverting input terminal compares for inputting the second voltage signal, output end for inputting first
Signal；
Second comparator, non-inverting input terminal is for inputting the second reference voltage signal, inverting input terminal and coagulation electricity
The output end on road connects, and the inverting input terminal compares for inputting the second voltage signal, output end for exporting second
Signal,
Wherein, the reference voltage signal includes first reference voltage signal and second reference voltage signal, described
First comparison signal and second comparison signal are connected to exports the comparison result signal together.
5. protection circuit according to claim 4, which is characterized in that the comparison circuit further include:
First resistor is serially connected in the anti-of the output end of the generative circuit of first reference voltage signal and the first comparator
Between phase input terminal；
Second resistance is serially connected between the coagulation circuit and the non-inverting input terminal of the first comparator；
3rd resistor is serially connected between the coagulation circuit and the inverting input terminal of second comparator；
4th resistance is serially connected in the same of the output end of the generative circuit of second reference voltage signal and second comparator
Between phase input terminal.
6. protection circuit according to claim 5, which is characterized in that the first resistor and the second resistance resistance value phase
Together, the 3rd resistor is identical with the resistance value of the 4th resistance.
7. protection circuit according to claim 4, which is characterized in that the comparison circuit further include:
5th resistance, one end are connect with DC power supply；
The output end of the first comparator and second comparator is connected to first node, the second end of the 5th resistance
It is connected to the first node, the first node is for exporting the comparison result signal.
8. protection circuit according to claim 1, which is characterized in that the single supply sample circuit be it is following at least it
One: current sensor, voltage sensor and sampling resistor.
9. a kind of electricity system with energy storage function, which is characterized in that two-way changing described in any one of claim 1-8
The protection circuit of device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610840096.1A CN106451363B (en) | 2016-09-21 | 2016-09-21 | The protection circuit of reversible transducer and the electricity system with energy storage function |
| PCT/CN2017/080126 WO2018054038A1 (en) | 2016-09-21 | 2017-04-11 | Protection circuit of bidirectional converter and power consumption system having power storage function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610840096.1A CN106451363B (en) | 2016-09-21 | 2016-09-21 | The protection circuit of reversible transducer and the electricity system with energy storage function |
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| Publication Number | Publication Date |
|---|---|
| CN106451363A CN106451363A (en) | 2017-02-22 |
| CN106451363B true CN106451363B (en) | 2019-05-07 |
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| CN201610840096.1A Active CN106451363B (en) | 2016-09-21 | 2016-09-21 | The protection circuit of reversible transducer and the electricity system with energy storage function |
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| WO (1) | WO2018054038A1 (en) |
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|---|---|---|---|---|
| CN106451363B (en) * | 2016-09-21 | 2019-05-07 | 珠海格力电器股份有限公司 | The protection circuit of reversible transducer and the electricity system with energy storage function |
| CN111130057A (en) * | 2018-11-01 | 2020-05-08 | 华润微电子（重庆）有限公司 | Bidirectional overcurrent protection circuit and bidirectional overcurrent protection method |
| CN112671244B (en) * | 2020-12-03 | 2024-03-26 | 珠海格力电器股份有限公司 | Overcurrent protection device and method of BMS active equalization system and automobile |
| CN113342116B (en) * | 2021-06-30 | 2023-08-04 | 合肥博雷电气有限公司 | Voltage reference setting circuit capable of being adjusted in program control mode and hardware equipment |
| CN114825407B (en) * | 2022-06-22 | 2022-10-18 | 锦浪科技股份有限公司 | Charging and discharging switching method, device, system and medium of bidirectional converter |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060152872A1 (en) * | 2005-01-11 | 2006-07-13 | Lin Tsun H | Automatic DC power detection device containing circuit protection device for over-voltage and over-current protection |
| CN202405760U (en) * | 2012-01-10 | 2012-08-29 | 中冶南方（武汉）自动化有限公司 | Over-current protection circuit of frequency converter |
| CN103219705B (en) * | 2013-03-12 | 2016-02-24 | 中兴通讯股份有限公司 | The short-circuit protection method of half bridge resonant transformer and device |
| CN103731039A (en) * | 2013-12-19 | 2014-04-16 | 陕西科技大学 | Two-way direct current converter with high conversion efficiency |
| CN103746551B (en) * | 2014-01-22 | 2016-06-08 | 哈尔滨工业大学 | The current closed-loop compound regulation system of two-way triple DC-DC converter |
| CN104868731B (en) * | 2014-02-21 | 2017-09-29 | 东莞钜威动力技术有限公司 | Two-way isolation DC DC converters |
| CN103929087A (en) * | 2014-04-01 | 2014-07-16 | 陕西科技大学 | High-efficiency high-power-factor two-way AC/DC converter |
| WO2015157600A1 (en) * | 2014-04-11 | 2015-10-15 | Primus Power Corporation | Series-connected storage interface and power converter |
| CN104868776B (en) * | 2015-05-12 | 2016-10-12 | 江苏固德威电源科技股份有限公司 | It is applied to the double-direction control drive circuit of energy storage inverter |
| CN206041472U (en) * | 2016-09-21 | 2017-03-22 | 珠海格力电器股份有限公司 | Protection circuit of bidirectional transform ware and electric system of using of taking accumulate function |
| CN106451363B (en) * | 2016-09-21 | 2019-05-07 | 珠海格力电器股份有限公司 | The protection circuit of reversible transducer and the electricity system with energy storage function |
-
2016
- 2016-09-21 CN CN201610840096.1A patent/CN106451363B/en active Active
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2017
- 2017-04-11 WO PCT/CN2017/080126 patent/WO2018054038A1/en active Application Filing
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| Publication number | Publication date |
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| WO2018054038A1 (en) | 2018-03-29 |
| CN106451363A (en) | 2017-02-22 |
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