CN106451363A - Protection circuit of bidirectional converter, and power system with electricity storage function - Google Patents
Protection circuit of bidirectional converter, and power system with electricity storage function Download PDFInfo
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- CN106451363A CN106451363A CN201610840096.1A CN201610840096A CN106451363A CN 106451363 A CN106451363 A CN 106451363A CN 201610840096 A CN201610840096 A CN 201610840096A CN 106451363 A CN106451363 A CN 106451363A
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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)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Emergency Protection Circuit Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a protection circuit of a bidirectional converter, and a power system with an electricity storage function. The circuit is applied to the power system with the electricity storage function; the circuit comprises a single power supply sampling circuit, a primary processing circuit, a comparison circuit and a secondary processing circuit, wherein the single power supply sampling circuit is connected with the bidirectional converter in the power system and used for collecting a first voltage signal of the bidirectional converter; the primary processing circuit is connected with the single power supply sampling circuit and used for performing signal processing on the first voltage signal to obtain a second voltage signal; the comparison circuit is connected with the primary processing circuit and used for comparing a reference voltage signal with the second voltage signal to output a comparison result signal; and the secondary processing circuit is connected with the comparison circuit and used for executing a protection action according to the comparison result signal. By adoption of the protection circuit of the bidirectional converter and the power system with the electricity storage function, the technical problem of complex protection circuit of the bidirectional converter in the power system with the electricity storage function is solved.
Description
Technical field
The present invention relates to power domain, in particular to protection circuit and the band energy storage function of a kind of reversible transducer
Electricity system.
Background technology
Reversible transducer is mainly used in the electricity system with energy-storage function, as it is shown in figure 1, this kind of electricity system is main
Including power-supply system the 11st, electricity system the 12nd, reversible transducer 13 and energy-storage system 14, wherein reversible transducer is energy conversion pivot
Knot.When power-supply system 11 power output, higher than load request, (reversible transducer works in the signal of charge mode as shown in Figure 2
Figure) when, unnecessary energy passes through reversible transducer 13 by energy storage in energy-storage system 14, and reversible transducer 13 works in and fills
Power mode, sees Fig. 2, and the direction of arrow is direction of current flow；When power-supply system 11 generated output deficiency or power down, energy storage
Energy can be discharged by system 14 by reversible transducer 13, to maintain the normal power supply of electricity system 12, two-way changing
Device 13 works in discharge mode, sees Fig. 3, and the direction of arrow is direction of current flow.
As can be seen here, reversible transducer is in the case of keeping both end voltage polarity constant, changes according to application demand
The sense of current, it is achieved the two-way flow of energy, in existing reversible transducer, its current foldback circuit is complicated, loaded down with trivial details, 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 that the protection circuit of reversible transducer in the above-mentioned electricity system with energy-storage function is complicated, at present still
Effective solution is not proposed.
Content of the invention
Embodiments provide the protection circuit of a kind of reversible transducer and the electricity system with energy storage function, so that
The technical problem that in few electricity system solving with energy-storage function, the protection circuit of reversible transducer is complicated.
An aspect according to embodiments of the present invention, provides the protection circuit of a kind of reversible transducer, be applied to
The electricity system of energy storage function, including：Single supply sample circuit, is connected with the reversible transducer in described electricity system, is used for
Gather the first voltage signal of described reversible transducer；Coagulation circuit, is connected with described single supply sample circuit, and it is right to be used for
Described first voltage signal carries out signal transacting, obtains the second voltage signal；Comparison circuit, with described coagulation circuit even
Connect, for comparing reference voltage signal with described second voltage signal, export comparative result signal；Two stage treatment electricity
Road, is connected with described comparison circuit, for performing protection act according to described comparative result signal.
Further, described coagulation circuit includes：First low pass filter, with described single supply sample circuit even
Connect, for filtering the high-frequency signal in described first voltage signal, obtain the first trap signal；Voltage follower, with described
One low pass filter connects, and for carrying out impedance matching to described first trap signal, obtains described second voltage signal.
Further, described voltage follower includes：Operational amplifier, the inverting input of described operational amplifier with defeated
Going out end to connect, the inverting input of described operational amplifier is connected with the output of described low pass filter；Described operation amplifier
The output of device, as the output of described coagulation circuit, is used for exporting described second voltage signal.
Further, described comparison circuit includes：First comparator, inverting input is for input the first reference voltage letter
Number, in-phase input end is connected with the output of described coagulation circuit, and described in-phase input end is used for inputting the described second electricity
Pressure signal, output is for input the first comparison signal；Second comparator, in-phase input end is for input the second reference voltage letter
Number, inverting input is connected with the output of described coagulation circuit, and described inverting input is used for inputting the described second electricity
Pressure signal, output is for output the second comparison signal, and wherein, described reference voltage signal includes described first reference voltage letter
Number and described second reference voltage signal, described first comparison signal receive with described second comparison signal together with export described ratio
Compared with consequential signal.
Further, described comparison circuit also includes：First resistance, is serially connected in the generation of described first reference voltage signal
Between the output of circuit and the inverting input of described first comparator；Second resistance, is serially connected in described coagulation circuit
And between the in-phase input end of described first comparator；3rd resistance, is serially connected in described coagulation circuit and described second ratio
Between the inverting input of device；4th resistance, be serially connected in described second reference voltage signal generative circuit output with
Between the in-phase input end of described second comparator.
Further, described first resistance is identical with described second resistance, described 3rd resistance and described 4th electricity
The resistance of resistance is identical.
Further, described comparison circuit also includes：5th resistance, one end is connected with dc source；Described first compares
The output of device and described second comparator is connected to first node, and the second end of described 5th resistance is connected to described first segment
Point, described first node is used for exporting described comparative result signal.
Further, described two stage treatment circuit includes：Second low pass filter, connects with the output of described comparison circuit
Connect, for described comparative result signal is filtered, obtain protection and judge signal；Perform circuit, with described second low pass filtered
Ripple device connects, for judging that signal performs protection act according to described protection.
Further, described execution circuit includes：Processor, is connected with described second low pass filter, for described
In the case that protection judges that signal is high level signal, determine that described reversible transducer is in normal condition, do not perform protection dynamic
Make；In the case that described protection judges that signal is low level signal, determine that described reversible transducer is in over-current state, perform
Protection act.
Further, described single supply sample circuit is at least one following：Current sensor, voltage sensor and sampling
Resistance.
Another aspect according to embodiments of the present invention, additionally provides a kind of electricity system with energy storage function, this electricity consumption system
System motion reversible transducer carrys out protection circuit.
By above-described embodiment, single supply sample circuit is utilized to gather the first voltage signal of reversible transducer, in one-level
After it is processed by process circuit, obtain the second voltage signal.Reference voltage signal and the second voltage are believed by comparison circuit
Number comparing, exporting comparative result signal, two stage treatment circuit determines whether need according to a comparative result signal of output
Protection act to be performed.In this scenario, use single supply sample circuit to gather the voltage signal of reversible transducer, thus be not necessarily to
Use and dual power supply is set in the protection circuit, single supply is set and can realize the purpose of protection；In addition, in this scenario, utilize
One output signal just can realize that electric current forward crosses the duplicate protection of stream and reverse overcurrent.By above-described embodiment, can make
Realize the protection to reversible transducer by protection circuit simply, solve the electricity system with energy-storage function in prior art
The complicated problem of the protection circuit of middle reversible transducer.
Brief description
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of the electricity system with energy-storage function according to embodiments of the present invention；
Fig. 2 is the schematic diagram that reversible transducer according to embodiments of the present invention works in charge mode；
Fig. 3 is the schematic diagram that reversible transducer according to embodiments of the present invention works in discharge mode；
Fig. 4 is the schematic diagram of reversible transducer hardware composition according to embodiments of the present invention；
Fig. 5 is the current foldback circuit schematic diagram of reversible transducer according to embodiments of the present invention；
Fig. 6 is that reversible transducer according to embodiments of the present invention works in view when charging stream；
Fig. 7 is that reversible transducer according to embodiments of the present invention works in view when discharging stream.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with in the embodiment of the present invention
Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of not making creative work, all should belong to the model of present invention protection
Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " it is etc. for distinguishing similar object, without being used for describing specific order or precedence.Should be appreciated that so use
Data can exchange in the appropriate case, in order to embodiments of the invention described herein can with except here diagram or
Order beyond those describing is implemented.Additionally, term " includes " and " having " and their any deformation, it is intended that cover
Covering non-exclusive comprising, for example, the process, method, system, product or the equipment that contain series of steps or unit are not necessarily limited to
Those steps clearly listed or unit, but can include clearly not listing or for these processes, method, product
Or intrinsic other steps of equipment or unit.
Embodiments providing the protection circuit of a kind of reversible transducer, this protection circuit is applied to storage electric work
Can electricity system, its hardware form as shown in Figure 4, single supply sample circuit the 41st, coagulation circuit the 43rd, comparison circuit 45 with
And two stage treatment circuit 47.
Single supply sample circuit 41, is connected with the reversible transducer in electricity system, for gathering 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.
It below as a example by above-mentioned single supply sample circuit 41 is as current sensor, is analyzed.Current sensor uses single
Power supply is powered, and current sensor output is voltage signal and is just.When input current is zero, current sensor output one
The bias voltage of definite value；When input current is forward (charge mode), sampling and outputting voltage is higher than bias voltage；Work as input
When electric current is reverse (discharge mode), sampling and outputting voltage is less than bias voltage and is more than zero.After current sensor is sampled
The first voltage signal obtaining is transferred to coagulation circuit 43.
Coagulation circuit 43, is connected with single supply sample circuit, for signal transacting is carried out to the first voltage signal,
To the second voltage signal.Coagulation circuit 43 includes the first low pass filter and voltage follower.
Specifically, it after above-mentioned first voltage signal being filtered high-frequency signal by the first low pass filter, then is transferred to electricity
Pressure is followed wherein, is improved by the input impedance to the first voltage signal for the voltage follower, and to the first voltage signal
Input capacitance carries out smaller part reason, it is ensured that the precision of the first voltage signal.Finally will obtain after coagulation circuit 43 is processed
To the second voltage signal be transferred to comparison circuit 45.
Comparison circuit 45, is connected with coagulation circuit, for comparing reference voltage signal and the second voltage signal
Relatively, comparative result signal is exported.Comparison circuit comprises first and compares electrical equipment and second and compare electrical equipment, respectively with the first reference voltage
Signal and the second reference voltage signal, compare, and exports comparative result signal.
Two stage treatment circuit 47, is connected with comparison circuit, for performing protection act according to comparative result signal.
Specifically, above-mentioned comparative result signal is after two stage treatment circuit 47, and compared result signal filters,
Judge signal to protection, judge that signal performs protection act further according to protection.That is, when comparative result signal is high level, double
Working in normal condition to converter, system is failure to actuate；After comparative result signal becomes low level, i.e. show reversible transducer
Being in over-current state, system enters guard mode.
By above-described embodiment, single supply sample circuit is utilized to gather the first voltage signal of reversible transducer, in one-level
After it is processed by process circuit, obtain the second voltage signal.Reference voltage signal and the second voltage are believed by comparison circuit
Number comparing, exporting comparative result signal, two stage treatment circuit determines whether need according to a comparative result signal of output
Protection act to be performed.In this scenario, use single supply sample circuit to gather the voltage signal of reversible transducer, thus be not necessarily to
Use and dual power supply is set in the protection circuit, single supply is set and can realize the purpose of protection；In addition, in this scenario, utilize
One output signal just can realize that electric current forward crosses the duplicate protection of stream and reverse overcurrent.By above-described embodiment, can make
Realize the protection to reversible transducer by protection circuit simply, solve the electricity system with energy-storage function in prior art
The complicated problem of the protection circuit of middle reversible transducer.
Above-described embodiment, by the Duplex treatment to sampled signal, it is achieved that during the forward and reverse stream excessively of reversible transducer, to two
Being uniformly processed of individual over-current signal.
Further, coagulation circuit includes：First low pass filter, is connected with single supply sample circuit, was used for
Filter the high-frequency signal in the first voltage signal, obtain the first trap signal；Voltage follower, is connected with the first low pass filter,
For impedance matching is carried out to the first trap signal, obtain the second voltage signal.
In example as shown in Figure 5, the first low pass filter is made up of the 6th resistance R6 and the first electric capacity C1, is used for filtering
Except high-frequency signal.First voltage signal V1, after the first low pass filter, is input to the in-phase input end of operational amplifier Y1.
As it is shown in figure 5, voltage follower can include：Operational amplifier Y1, the inverting input of operational amplifier with defeated
Going out end to connect, the inverting input of operational amplifier is connected with the output of low pass filter；The output of operational amplifier is made
For the output of coagulation circuit, for output the second voltage signal V2, this voltage follower is utilized to improve current sample letter
Number input impedance, reduce input capacitance, it is ensured that the precision of current sampling signal.
Further, in example as shown in Figure 5, comparison circuit can include：First comparator B1, inverting input is used
In inputting the first reference voltage signal Vref1, in-phase input end is connected with the output of coagulation circuit, and in-phase input end is used
In inputting the second voltage signal, output is for input the first comparison signal；Second comparator B2, in-phase input end is used for inputting
Second reference voltage signal Vref2, inverting input is connected with the output of coagulation circuit, and inverting input is used for inputting
Second voltage signal, output is for output the second comparison signal, and the inverting input of the first comparator is by the first reference voltage
Access after signal concatenation the first resistance R1；The in-phase input end of the second comparator is by the second reference voltage signal concatenation the 4th resistance
Access after R4.
Wherein, reference voltage signal includes the first reference voltage signal and the second reference voltage signal, the first comparison signal
Comparative result signal is exported with the second comparison signal together with receiving.
Further, the comparison circuit shown in Fig. 5 can also include：First resistance R1, is serially connected in the first reference voltage
Between the inverting input of the output of the generative circuit of signal and the first comparator；Second resistance R2, is serially connected in coagulation
Between the in-phase input end of circuit and the first comparator；3rd resistance R3, is serially connected in coagulation circuit and the second comparator
Between inverting input；4th resistance R4, is serially connected in the output of the generative circuit of the second reference voltage signal and second and compares
Between the in-phase input end of device.
Further, the first resistance and the second resistance are identical, and the resistance of the 3rd resistance and the 4th resistance is identical.Two
Comparator all uses Differential Input mode, i.e. resistance is identical, is used for amplifying difference mode signal suppression common-mode signal.
Further, comparison circuit also includes：5th resistance R5, one end is connected with dc source VCC；First comparator and
The output of the 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
Output comparative result signal.First comparator and the second comparator connect at first node, the first comparison signal and the second ratio
Pool together at first node compared with signal, and through pull-up resistor incoming two stage treatment circuit at first node.
Specifically, as it is shown in figure 5, the current foldback circuit of reversible transducer mainly include prime signal processing circuit (as
Coagulation circuit in above-described embodiment), the comparison circuit that two comparators respectively constitute and rear class signal processing circuit
(two stage treatment circuit described above).When reversible transducer normally works, the value of above-mentioned second voltage signal is between the first base
Between quasi-voltage signal and the second reference voltage signal, the first comparator and the second comparator export high level (namely simultaneously
One comparison signal and the second comparison signal are high level), comparative result signal is high level.
Specifically, as shown in Figure 6, when reversible transducer works in charging over-current state, above-mentioned second voltage signal is high
In the first reference voltage signal, now the anti-phase input terminal voltage of the first comparator is higher than in-phase input end voltage, and first compares
The output of device is become low level from high level, simultaneously by the output also clamper of the second comparator in low level, so comparative result
Signal is become low level from high level.
Specifically, as it is shown in fig. 7, when reversible transducer works in electric discharge over-current state, above-mentioned second voltage signal is low
In the second reference voltage signal, now the in-phase input end voltage of the second comparator is less than anti-phase input terminal voltage, and second compares
The output of device is become low level from high level, simultaneously by the output also clamper of the first comparator in low level, so comparative result
Signal is become low level from high level.
Further, two stage treatment circuit includes：Second low pass filter, is connected with the output of comparison circuit, is used for
Compared result signal filters, and obtains protection and judges signal；Perform circuit, be connected with the second low pass filter, be used for root
Judge that signal performs protection act according to protection.In the example depicted in fig. 5, the second low pass filter includes the 7th resistance R7 and
Two electric capacity C2.Output overcurrent protection voltage after the filtering of comparative result last low-pass filtered device, this signal is reversible transducer
Overcurrent protection judge signal.
Further, perform circuit to include：Processor, is connected with the second low pass filter, for judging signal in protection
In the case of for high level signal, determine that reversible transducer is in normal condition, do not perform protection act；Judge signal in protection
In the case of for low level signal, determine that reversible transducer is in over-current state, perform 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 system with energy storage function, and this electricity system uses above-mentioned two-way
Converter carries out protection circuit.
By above-described embodiment, the present invention passes through current sensor, one group of signal processing circuit, it is achieved that two-way change
Overcurrent protection function during the forward and reverse operation of parallel operation.And this current foldback circuit output signal is level signal, anti-interference
By force, fast response time, and only one of which output signal is achieved that electric current forward crosses stream and the duplicate protection of reverse overcurrent, not only
Reduce cost, improve the reliability of system, and preferably work can be played in the case of I/O mouth or enable control end are less
With.By the Duplex treatment to sampled signal, it is achieved that during the forward and reverse stream excessively of reversible transducer, the unification to two over-current signals
Process.
Current foldback circuit proposed by the invention, is mainly used in electric current two-way flow occasion, naturally it is also possible to application
In electric current one-way flow occasion.
In above-described embodiment, current sensor uses voltage-type output transducer, it would however also be possible to employ current mode exports
Sensor.
Further, current sample mode be not limited to current sensor sampling, can apply resistance sampling and other
Sample mode；
Further, current sensor power supply mode is also not limited to single supply and powers, and can use dual power supply, i.e.
Generating positive and negative voltage is powered；
Further, over-current signal can be high level or low level, and the over-current signal of this programme is Low level effective, also
High level signal can be used as overcurrent protection signal.
By above-described embodiment, the present invention uses a current sensor, one group of signal processing circuit, it is achieved that two-way change
Overcurrent protection function during the forward and reverse operation of parallel operation.And this current foldback circuit output signal is level signal, anti-interference
By force, fast response time, and only one of which output signal is achieved that electric current forward crosses stream and the duplicate protection of reverse overcurrent, not only
Reduce cost, improve the reliability of system, and preferably work can be played in the case of I/O mouth or enable control end are less
With.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not has in certain embodiment
The part describing in detail, may refer to the associated description of other embodiments.
In several embodiments provided herein, it should be understood that disclosed technology contents, can be passed through other
Mode realizes.Wherein, device embodiment described above is only schematically, the division of such as unit, can be one
Logic function divides, actual can have when realizing other dividing mode, for example multiple unit or assembly can in conjunction with or can
Being integrated into another system, or some features can be ignored, or does not performs.Another point, shown or discussed each other
Coupling or direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING of unit or module or communication connection,
It can be electrical or other form.
The described unit illustrating as separating component can be or may not be physically separate, shows as unit
The parts showing can be or may not be physical location, i.e. may be located at a place, or also can be distributed to multiple
On unit.Some or all of unit therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.Above-mentioned integrated list
Unit both can use the form of hardware to realize, it would however also be possible to employ the form of SFU software functional unit realizes.
If described integrated unit realizes and as independent production marketing or use using the form of SFU software functional unit
When, can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part that in other words prior art contributed or this technical scheme completely or partially can be with the form of software product
Embodying, this computer software product is stored in a storage medium, including some instructions are with so that a computer
Equipment (personal computer, server or the network equipment etc. can be) perform the whole of method described in each embodiment of the present invention or
Part steps.And aforesaid storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. are various can store program code
Medium.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (11)
1. the protection circuit of a reversible transducer, it is characterised in that be applied to the electricity system with energy storage function, including：
Single supply sample circuit, is connected with the reversible transducer in described electricity system, for gathering described reversible transducer
First voltage signal；
Coagulation circuit, is connected with described single supply sample circuit, for signal transacting is carried out to described first voltage signal,
Obtain the second voltage signal；
Comparison circuit, is connected with described coagulation circuit, for carrying out reference voltage signal with described second voltage signal
Relatively, comparative result signal is exported；
Two stage treatment circuit, is connected with described comparison circuit, for performing protection act according to described comparative result signal.
2. protection circuit according to claim 1, it is characterised in that described coagulation circuit includes：
First low pass filter, is connected with described single supply sample circuit, for filtering the high frequency in described first voltage signal
Signal, obtains the first trap signal；
Voltage follower, is connected with described first low pass filter, for impedance matching is carried out to described first trap signal,
To described second voltage signal.
3. protection circuit according to claim 2, it is characterised in that described voltage follower includes：
Operational amplifier, the inverting input of described operational amplifier is connected with output, described operational amplifier anti-phase defeated
Enter end to be connected with the output of described low pass filter；The output of described operational amplifier is as described coagulation circuit
Output, is used for exporting described second voltage signal.
4. protection circuit according to claim 1, it is characterised in that described comparison circuit includes：
First comparator, inverting input is for input the first reference voltage signal, in-phase input end and described coagulation electricity
The output on road connects, and described in-phase input end is used for inputting described second voltage signal, and output compares for input first
Signal；
Second comparator, in-phase input end is for input the second reference voltage signal, inverting input and described coagulation electricity
The output on road connects, and described inverting input is used for inputting described second voltage signal, and output compares for output second
Signal,
Wherein, described reference voltage signal includes described first reference voltage signal and described second reference voltage signal, described
First comparison signal exports described comparative result signal together with receiving with described second comparison signal.
5. protection circuit according to claim 4, it is characterised in that described comparison circuit also includes：
First resistance, is serially connected in output and described first comparator anti-of the generative circuit of described first reference voltage signal
Between phase input；
Second resistance, is serially connected between described coagulation circuit and the in-phase input end of described first comparator；
3rd resistance, is serially connected between described coagulation circuit and the inverting input of described second comparator；
4th resistance, is serially connected in output and described second comparator same of the generative circuit of described second reference voltage signal
Between phase input.
6. protection circuit according to claim 5, it is characterised in that described first resistance and described second resistance phase
With described 3rd resistance is identical with the resistance of described 4th resistance.
7. protection circuit according to claim 4, it is characterised in that described comparison circuit also includes：
5th resistance, one end is connected with dc source；
The output of described first comparator and described second comparator is connected to first node, the second end of described 5th resistance
Being connected to described first node, described first node is used for exporting described comparative result signal.
8. protection circuit according to claim 1, it is characterised in that described two stage treatment circuit includes：
Second low pass filter, is connected with the output of described comparison circuit, for described comparative result signal is filtered,
Obtain protection and judge signal；
Perform circuit, be connected with described second low pass filter, for judging that signal performs protection act according to described protection.
9. protection circuit according to claim 8, it is characterised in that described execution circuit includes：
Processor, is connected with described second low pass filter, for judging, in described protection, the situation that signal is high level signal
Under, determine that described reversible transducer is in normal condition, do not perform protection act；Judge that signal is low level letter in described protection
Number in the case of, determine that described reversible transducer is in over-current state, perform protection act.
10. protection circuit according to claim 1, it is characterised in that described single supply sample circuit be following at least it
One：Current sensor, voltage sensor and sampling resistor.
11. 1 kinds of electricity systems with energy storage function, it is characterised in that the two-way change described in any one in claim 1-10
The protection circuit of parallel operation.
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 true CN106451363A (en) | 2017-02-22 |
| CN106451363B 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) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018054038A1 (en) * | 2016-09-21 | 2018-03-29 | 珠海格力电器股份有限公司 | Protection circuit of bidirectional converter and power consumption system having power 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 |
| CN112671244A (en) * | 2020-12-03 | 2021-04-16 | 珠海格力电器股份有限公司 | Overcurrent protection device and method for BMS active equalization system and automobile |
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| 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 |
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Also Published As
| Publication number | Publication date |
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| WO2018054038A1 (en) | 2018-03-29 |
| CN106451363B (en) | 2019-05-07 |
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