CN212258436U - Light storage current transformer - Google Patents
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- CN212258436U CN212258436U CN202021397740.0U CN202021397740U CN212258436U CN 212258436 U CN212258436 U CN 212258436U CN 202021397740 U CN202021397740 U CN 202021397740U CN 212258436 U CN212258436 U CN 212258436U
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Abstract
The present disclosure relates to a light storing converter. The light storing current transformer comprises: voltage and current acquisition device, light store converter controlling means, direct current-direct current converting circuit and general interface, wherein: the voltage and current acquisition device is used for acquiring the voltage and the current of the universal interface and sending the voltage and the current of the universal interface to the light storage converter control device under the condition that the universal interface of the light storage converter is connected into the equipment; the light storage converter control device is connected with the direct current-direct current conversion circuit; the light storage converter control device is used for judging that the access equipment is a photovoltaic system or an energy storage system according to the voltage and the current of the universal interface; and under the condition that the access equipment is a photovoltaic system or an energy storage system, controlling the direct current-direct current conversion circuit to perform corresponding adjustment. The photovoltaic interface and the energy storage interface can be generalized, the universal interface can be connected with a photovoltaic system and also can be connected with an energy storage system, and internal self-identification and self-adaptation can be realized.
Description
Technical Field
The disclosure relates to the technical field of power electronics, in particular to a light storage converter.
Background
With the development of power electronic technology, converter photovoltaic is applied to a direct-current microgrid system such as photovoltaic power generation, energy storage and transformation, in practical application, AC-DC, photovoltaic DC and energy storage DC are designed independently, and in low power, photovoltaic DC, energy storage DC and AC-DC are combined together to respectively design corresponding photovoltaic and energy storage interfaces, as shown in fig. 1.
Disclosure of Invention
The inventor finds out according to the research that: in the related art, due to the design of the air cooling scheme, the AC-DC, the photovoltaic DC and the energy storage DC are not combined together, so that the high-power air cooling scheme is difficult to integrate.
In view of at least one of the above technical problems, the present disclosure provides a light storage converter, which may open a photovoltaic interface and an energy storage interface as a universal interface, where the universal interface may be connected to a photovoltaic input or an energy storage system.
According to an aspect of the present disclosure, there is provided an optical storage converter, including a voltage and current acquisition device, an optical storage converter control device, a dc-dc conversion circuit, and a universal interface, wherein:
the universal interface is connected with a corresponding direct current-direct current conversion circuit, the voltage and current acquisition device is connected with the universal interface, and the voltage and current acquisition device is connected with the light storage converter control device; the voltage and current acquisition device is used for acquiring the voltage and the current of the universal interface and sending the voltage and the current of the universal interface to the light storage converter control device under the condition that the universal interface of the light storage converter is connected into the equipment;
the light storage converter control device is connected with the direct current-direct current conversion circuit; the light storage converter control device is used for judging that the access equipment is a photovoltaic system or an energy storage system according to the voltage and the current of the universal interface; and under the condition that the access equipment is a photovoltaic system or an energy storage system, controlling the direct current-direct current conversion circuit to perform corresponding adjustment.
In some embodiments of the present disclosure, the optical storage converter control device is configured to adjust a dc-dc conversion circuit inside the optical storage converter to a boost circuit operation in a case that the access device is a photovoltaic system; and under the condition that the access equipment is an energy storage system, adjusting a direct current-direct current conversion circuit in the optical storage converter to be a buck-boost circuit for operation.
In some embodiments of the present disclosure, the dc-dc conversion circuit comprises a first switch tube module and a second switch tube module connected in series, wherein:
the first switching tube module comprises a first switching tube and a first freewheeling diode, and the second switching tube module comprises a second switching tube and a second freewheeling diode;
the first port of the first switch tube module is connected with the first port of the capacitor, the second port of the first switch tube module is connected with the first port of the second switch tube module, the second port of the second switch tube module is connected with the second port of the capacitor, the second port of the first switch tube module is connected with the first port of the universal interface through the inductor, and the second port of the second switch tube module is connected with the second port of the universal interface.
In some embodiments of the present disclosure, the light storage converter control device is respectively connected to the control ends of the first switch tube and the second switch tube;
and the light storage converter control device is used for controlling the switching of the first switching tube and the second switching tube.
In some embodiments of the present disclosure, the light storage converter control device is configured to control the first switching tube to be turned off and the second switching tube to be turned on when the access device is a photovoltaic system.
In some embodiments of the present disclosure, the optical storage converter control device is configured to control the first switching tube to be turned off and the second switching tube to be turned on when the access device is the energy storage system and the energy storage system operates in a discharging state; and under the condition that the access equipment is an energy storage system and the energy storage system works in a charging state, the first switching tube is controlled to be opened and the second switching tube is controlled to be closed.
In some embodiments of the present disclosure, the optical storage converter control device is configured to adjust the buck-boost circuit to the buck mode of operation when the energy storage system is operating in the charging state; and under the condition that the energy storage system works in a discharging state, the voltage boosting and reducing circuit is adjusted to be in a voltage boosting working mode.
In some embodiments of the present disclosure, the voltage current collection device is connected to a front end of a circuit breaker at a universal interface;
the voltage and current acquisition device acquires the voltage and the current of the front end of the circuit breaker at the universal interface as the voltage and the current of the universal interface.
In some embodiments of the present disclosure, the light storing converter comprises a voltage comparator and a circuit controller, wherein:
the voltage comparator is connected with the circuit controller, the voltage comparator is connected with the voltage and current acquisition device, and the circuit controller is connected with the direct current-direct current conversion circuit;
the voltage comparator is used for judging whether the universal interface has voltage or not;
and the circuit controller is used for adjusting the direct current-direct current conversion circuit to be operated as a buck-boost circuit when the voltage comparator judges that the universal interface has no voltage.
In some embodiments of the present disclosure, the optical storage converter comprises a voltage regulator and a power monitor, wherein:
the circuit controller is respectively connected with the voltage regulator and the power monitor, and the voltage regulator is connected with the power monitor;
the circuit controller is used for adjusting the direct current-direct current conversion circuit to the test operation of the booster circuit under the condition that the voltage comparator judges that the universal interface has voltage;
the voltage regulator is used for regulating the set voltage input by the universal interface;
the power monitor is used for monitoring whether the output power of the direct current-direct current conversion circuit changes corresponding to the set voltage adjustment;
the circuit controller is used for adjusting the DC-DC conversion circuit to the operation of the booster circuit under the condition that the power monitor monitors that the output power of the DC-DC conversion circuit changes corresponding to the set voltage adjustment; and under the condition that the power monitor monitors that the output power of the direct current-direct current conversion circuit does not change corresponding to the set voltage adjustment, adjusting the direct current-direct current conversion circuit in the optical storage converter to be a buck-boost circuit to operate.
The photovoltaic interface and the energy storage interface can be generalized, the universal interface can be connected with a photovoltaic system and also can be connected with an energy storage system, and internal self-identification and self-adaptation can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic diagram of some embodiments of a light storing converter according to the related art of the present disclosure.
Fig. 2 is a schematic diagram of some embodiments of the presently disclosed light storing current transformer.
Fig. 3 is a schematic diagram of another embodiment of the light storing converter of the present disclosure.
Fig. 4 is a schematic diagram of an acquisition port in some embodiments of the present disclosure.
Fig. 5 is a schematic diagram of a dc-dc conversion circuit when the access device is a photovoltaic system in some embodiments of the present disclosure.
Fig. 6 is a schematic diagram of the dc-dc conversion circuit in the discharging state in which the access device is the energy storage system according to some embodiments of the disclosure.
Fig. 7 is a schematic diagram of a dc-dc conversion circuit when an access device is an energy storage system and in a charging state according to some embodiments of the disclosure.
Fig. 8 is a schematic diagram of some embodiments of the presently disclosed converter control apparatus.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic diagram of some embodiments of a light storing converter according to the related art of the present disclosure. The inventor finds out through research that: the photovoltaic and energy storage interfaces of the related art optical storage converters are fixed channels and fixed positions.
In view of at least one of the above technical problems, the present disclosure provides an optical storage converter, a control method and apparatus thereof, and a computer readable storage medium, and the present disclosure is described below with specific embodiments.
Fig. 2 is a schematic diagram of some embodiments of the presently disclosed light storing current transformer. As shown in fig. 2, the optical storage converter of the present disclosure may include an optical storage converter control apparatus 200, a voltage and current collecting apparatus 100, a direct current-direct current (DC-DC) conversion circuit 300, and a universal interface 400, wherein:
in some embodiments of the present disclosure, the optical storage converter of the present disclosure may include at least one voltage current collection device 100, at least one direct current-direct current (DC-DC) conversion circuit 300 and at least one universal interface 400,
one general interface 400 corresponds to one dc-dc conversion circuit 300, and one general interface 400 corresponds to one voltage and current collecting device 100.
Each universal interface 400 is connected to a corresponding dc-dc conversion circuit 300. Each voltage and current collecting device 100 is connected to a corresponding universal interface 400.
For example: in the embodiment of fig. 2, the optical storage converter includes two general interfaces 400, and the two general interfaces 400 correspond to the two dc-dc conversion circuits 300 and the two voltage and current collecting devices 100, respectively.
The voltage and current acquisition device 100 is connected with the light storage converter control device 200.
The voltage and current collecting device 100 is configured to collect the voltage and the current of the universal interface 400 when the universal interface 400 of the photovoltaic power storage converter is connected to the device, and send the voltage and the current of the universal interface 400 to the photovoltaic power storage converter control device 200.
The light storage converter control device 200 is connected to a dc-dc conversion circuit 300.
The optical storage converter control device 200 is used for judging that the access equipment is a photovoltaic system or an energy storage system according to the voltage and the current of the universal interface 400; and under the condition that the access equipment is a photovoltaic system or an energy storage system, controlling the direct current-direct current conversion circuit 300 to perform corresponding adjustment.
In some embodiments of the present disclosure, the optical storage converter control apparatus 200 may be configured to adjust the dc-dc conversion circuit 300 inside the optical storage converter to operate as a BOOST (BOOST) circuit in the case that the access device is a photovoltaic system; under the condition that the access equipment is an energy storage system, the direct current-direct current conversion circuit 300 inside the optical storage converter is adjusted to be a BUCK-BOOST (BUCK-BOOST) circuit to operate.
Fig. 3 is a schematic diagram of another embodiment of the light storing converter of the present disclosure. As shown in fig. 3, the open optical storage converter of the present disclosure further includes a direct current-alternating current (DC-AC) conversion circuit 500 and a capacitor 600, wherein:
and the light storage converter control device 200 is used for judging whether an external photovoltaic system or an energy storage system is actually accessed through an algorithm after the access equipment is actually accessed, and implementing software function control according to a corresponding interface after the judgment is finished.
In some embodiments of the present disclosure, the refrigerant is directly used for heat dissipation.
In some embodiments of the present disclosure, the light storage converter structurally integrates the DC-AC unit, the photovoltaic DC unit, and the energy storage DC unit, and adopts a common material design, and is made into a modular unit.
The light storage converter provided based on the embodiment of the disclosure is a high-power light storage converter with photovoltaic and energy storage interface recognition functions, and structurally integrates a DC-AC unit, a photovoltaic DC unit and an energy storage DC unit, and adopts a common material design to manufacture a modular unit, so that the cost of other materials which are increased by independent design is reduced. Meanwhile, the photovoltaic and energy storage interfaces are opened, the high-power optical storage converter with the universal structural function is realized, the photovoltaic interface or the energy storage interface is not required to be distinguished, and the self-adaption of the photovoltaic and energy storage interfaces can be realized.
Fig. 4 is a schematic diagram of an acquisition port in some embodiments of the present disclosure. As shown in fig. 4, the voltage and current collecting device 100 is connected to the front end of the circuit breaker at the universal interface 400.
The voltage and current collecting device 100 is configured to collect voltage and current at the front end of the circuit breaker at the universal interface 400, and use the voltage and current as the voltage and current of the universal interface 400.
In some embodiments of the present disclosure, as shown in fig. 3 and 4, each dc-dc conversion circuit 300 may include a first switch tube module 310 and a second switch tube module 320 connected in series, wherein:
the first switch tube module 310 includes a first switch tube 311 and a first freewheeling diode 312, and the second switch tube module 320 includes a second switch tube 321 and a second freewheeling diode 322.
The first port of the first switch tube module 310 is connected with the first port of the capacitor, the second port of the first switch tube module 310 is connected with the first port of the second switch tube module 320, the second port of the second switch tube module 320 is connected with the second port of the capacitor, the second port of the first switch tube module 310 is connected with the first port of the general interface 400 through the inductor, and the second port of the second switch tube module 320 is connected with the second port of the general interface 400.
In some embodiments of the present disclosure, the first switch tube 311 and the second switch tube 321 may be IGBT switch tubes.
In some embodiments of the present disclosure, the light storage converter control device 200 is connected to the control terminals of the first switch tube 311 and the second switch tube 321, respectively.
And the light storage converter control device 200 is used for controlling the switching of the first switch tube 311 and the second switch tube 321.
Fig. 5 is a schematic diagram of a dc-dc conversion circuit when the access device is a photovoltaic system in some embodiments of the present disclosure. As shown in fig. 5, in the case of a photovoltaic system, the control scheme is to control the input voltage, looking for the maximum power output. The light storage converter control device 200 may be configured to control the first switching tube 311 to be always closed, the first open switching tube module 310 to be used as a diode, and the second switching tube 321 to be opened, so as to adjust the dc-dc conversion circuit 300 to be a boost circuit, when the access device is a photovoltaic system.
Fig. 6 is a schematic diagram of the dc-dc conversion circuit in the discharging state in which the access device is the energy storage system according to some embodiments of the disclosure. As shown in fig. 6, the optical storage converter control apparatus 200 may be configured to control the first switch tube 311 to be turned off and the second switch tube 321 to be turned on when the access device is an energy storage system and the energy storage system operates in a discharging state, so as to adjust the dc-dc converter circuit 300 to a BUCK mode of the BUCK-boost circuit.
Fig. 7 is a schematic diagram of a dc-dc conversion circuit when an access device is an energy storage system and in a charging state according to some embodiments of the disclosure. As shown in fig. 7, when the access device is an energy storage system and is in a charging state, the control scheme is to control the output voltage, and the input voltage of the control is debugged, so that the effect of accessing the photovoltaic system is not generated. The optical storage converter control apparatus 200 may be configured to, when the access device is an energy storage system and the energy storage system operates in a charging state, control the first switch tube 311 to be turned on, control the second switch tube 321 to be turned off, and adjust the dc-dc converter circuit 300 to a BOOST operating mode of the buck-BOOST circuit.
In some embodiments of the present disclosure, the light storage converter control apparatus 200 may be configured to determine the charging and discharging states of the energy storage system according to the received control command or according to the current direction of the universal interface 400.
In the embodiments of fig. 3 to 7, the optical storage converter includes two general interfaces 400, and the two general interfaces 400 correspond to the two dc-dc conversion circuits 300 and the two voltage and current collecting devices 100, respectively.
According to the embodiment of the disclosure, after mode judgment, each high-power photovoltaic converter can develop a plurality of interfaces, so that flexible allocation of the interfaces is realized; and after the interface state is determined, when the photovoltaic system and the energy storage system are accessed in a mixed mode, the photovoltaic system works in a BOOST mode, and the energy storage system works in the BOOST mode and a BUCK mode according to the charging and discharging states. The circuit program of the above embodiment of the present disclosure operates according to the judged structure, and the general purpose of the interface can be realized.
The embodiment of the disclosure provides a new scheme for a high-power optical storage converter, which can combine AC-DC, photovoltaic DC and energy storage DC together. According to the embodiment of the disclosure, after actual access, whether external actual access is photovoltaic or energy storage is judged through an algorithm, and after judgment is completed, software function control is implemented according to a corresponding interface. According to the embodiment of the disclosure, the refrigerant is directly used for heat dissipation, the AC-DC unit, the photovoltaic DC unit and the energy storage DC unit are structurally integrated, and a modular unit is manufactured by adopting a common material design, so that the cost of other materials which are increased by independent design is reduced. Meanwhile, the photovoltaic and energy storage interfaces can be opened, the high-power optical storage converter with universal structural functions is realized, and the photovoltaic interface or the energy storage interface does not need to be distinguished. Meanwhile, the flexible expansion of the project channel can be realized by the embodiment of the disclosure.
Fig. 8 is a schematic diagram of some embodiments of the presently disclosed converter control apparatus. As shown in fig. 8, the light storing converter control device (e.g. the light storing converter control device 200 of the embodiment of fig. 2) of the present disclosure may include a voltage comparator 210 and a circuit controller 220, wherein:
the voltage comparator 210 is connected to the circuit controller 220, the voltage comparator 210 is connected to the voltage and current collecting device 100, and the circuit controller 220 is connected to the dc-dc conversion circuit 300.
The voltage comparator 210 is used to determine whether the universal interface 400 has a voltage.
And the circuit controller 220 is configured to determine that the access device is an energy storage system when the voltage comparator 210 determines that the universal interface 400 has no voltage, and adjust the dc-dc conversion circuit 300 to operate as a buck-boost circuit.
In some embodiments of the present disclosure, as shown in fig. 8, the optical storage converter may include a voltage regulator 230 and a power monitor 240, wherein:
the circuit controller 220 is connected to a voltage regulator 230 and a power monitor 240, respectively, and the voltage regulator 230 is connected to the power monitor 240.
The circuit controller 220 is configured to adjust the dc-dc converter circuit 300 to the boost circuit test operation when the voltage comparator 210 determines that the voltage is present at the universal interface 400.
And a voltage regulator 230 for regulating the set voltage inputted from the universal interface 400.
And a power monitor 240 for monitoring whether or not the output power of the dc-dc converter circuit 300 changes according to the setting voltage adjustment.
The circuit controller 220 is configured to determine that the access device is a photovoltaic system and adjust the dc-dc converter circuit 300 to a boost circuit operation when the power monitor 240 monitors that the output power of the dc-dc converter circuit 300 changes in accordance with the set voltage adjustment; when the power monitor 240 monitors that the output power of the dc-dc conversion circuit 300 does not change corresponding to the set voltage adjustment, it is determined that the access device is an energy storage system, and the dc-dc conversion circuit 300 in the optical storage converter is adjusted to operate as a buck-boost circuit.
In some embodiments of the present disclosure, since the photovoltaic boosting program is first operated, the photovoltaic can adjust the output current of the photovoltaic by adjusting the given voltage of the input, thereby generating the power variation.
In some embodiments of the present disclosure, the set voltage is a given voltage for optimizing photovoltaic MPPT (maximum power Point Tracking), and if a change in output-side power in the boost mode of the DC-DC circuit is detected after the given voltage is adjusted to operate, it is indicated that a photovoltaic panel (photovoltaic system) is connected. The output side power change can meet the photovoltaic volt-ampere characteristic curve.
In some embodiments of the present disclosure, as shown in fig. 5, the circuit controller 220 may be configured to control the first switching tube 311 to be always closed, the first open switching tube module 310 to be used as a diode, and the second switching tube 321 to be opened, so as to adjust the dc-dc converter circuit 300 to be a voltage boosting circuit in a case that the access device is a photovoltaic system.
In some embodiments of the present disclosure, as shown in fig. 6, the circuit controller 220 may be configured to control the first switch tube 311 to be turned off and the second switch tube 321 to be turned on, and adjust the dc-dc converter circuit 300 to the BUCK mode of the BUCK-boost circuit when the access device is the energy storage system and the energy storage system operates in the discharging state.
In some embodiments of the present disclosure, as shown in fig. 7, the circuit controller 220 may be configured to control the first switch tube 311 to be turned on and the second switch tube 321 to be turned off to adjust the dc-dc converter circuit 300 to the BOOST operating mode of the buck-BOOST circuit when the access device is the energy storage system and the energy storage system operates in the charging state.
According to the embodiment of the disclosure, after mode judgment, each high-power photovoltaic converter can develop a plurality of interfaces, so that flexible allocation of the interfaces is realized; and after the interface state is determined, when the photovoltaic system and the energy storage system are accessed in a mixed mode, the photovoltaic system works in a BOOST mode, and the energy storage system works in the BOOST mode and a BUCK mode according to the charging and discharging states. The circuit program of the above embodiment of the present disclosure operates according to the judged structure, and the general purpose of the interface can be realized.
The embodiment of the disclosure provides a new scheme for a high-power optical storage converter, which can combine AC-DC, photovoltaic DC and energy storage DC together. According to the embodiment of the disclosure, after actual access, whether external actual access is photovoltaic or energy storage is judged through an algorithm, and after judgment is completed, software function control is implemented according to a corresponding interface. According to the embodiment of the disclosure, the refrigerant is directly used for heat dissipation, the AC-DC unit, the photovoltaic DC unit and the energy storage DC unit are structurally integrated, and a modular unit is manufactured by adopting a common material design, so that the cost of other materials which are increased by independent design is reduced. Meanwhile, the photovoltaic and energy storage interfaces can be opened, the high-power optical storage converter with universal structural functions is realized, and the photovoltaic interface or the energy storage interface does not need to be distinguished. Meanwhile, the flexible expansion of the project channel can be realized by the embodiment of the disclosure.
The optical storage converter control apparatus described above may be implemented as a general purpose processor, a Programmable Logic Controller (PLC), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any suitable combination thereof, for performing the functions described herein.
Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
The description of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the disclosure in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the disclosure and the practical application, and to enable others of ordinary skill in the art to understand the disclosure for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (10)
1. The light stores the converter, characterized by, including voltage current pick device, light stores converter controlling means, direct current-direct current conversion circuit and general interface, wherein:
the universal interface is connected with a corresponding direct current-direct current conversion circuit, the voltage and current acquisition device is connected with the universal interface, and the voltage and current acquisition device is connected with the light storage converter control device; the voltage and current acquisition device is used for acquiring the voltage and the current of the universal interface and sending the voltage and the current of the universal interface to the light storage converter control device under the condition that the universal interface of the light storage converter is connected into the equipment;
the light storage converter control device is connected with the direct current-direct current conversion circuit; the light storage converter control device is used for judging that the access equipment is a photovoltaic system or an energy storage system according to the voltage and the current of the universal interface; and under the condition that the access equipment is a photovoltaic system or an energy storage system, controlling the direct current-direct current conversion circuit to perform corresponding adjustment.
2. The light storing converter according to claim 1,
the photovoltaic power generation system comprises a photovoltaic system, a photovoltaic storage converter control device, a boost circuit and a photovoltaic power generation device, wherein the photovoltaic storage converter control device is used for adjusting a direct current-direct current conversion circuit in the photovoltaic storage converter to be operated as the boost circuit under the condition that the access equipment is the photovoltaic system; and under the condition that the access equipment is an energy storage system, adjusting a direct current-direct current conversion circuit in the optical storage converter to be a buck-boost circuit for operation.
3. A light storing converter according to claim 1 or 2 wherein the dc-dc conversion circuit comprises a first switch tube module and a second switch tube module connected in series, wherein:
the first switching tube module comprises a first switching tube and a first freewheeling diode, and the second switching tube module comprises a second switching tube and a second freewheeling diode;
the first port of the first switch tube module is connected with the first port of the capacitor, the second port of the first switch tube module is connected with the first port of the second switch tube module, the second port of the second switch tube module is connected with the second port of the capacitor, the second port of the first switch tube module is connected with the first port of the universal interface through the inductor, and the second port of the second switch tube module is connected with the second port of the universal interface.
4. The light storing converter according to claim 3,
the light storage converter control device is respectively connected with the control ends of the first switch tube and the second switch tube;
and the light storage converter control device is used for controlling the switching of the first switching tube and the second switching tube.
5. The light storing converter according to claim 4,
and the light storage converter control device is used for controlling the first switch tube to be closed and the second switch tube to be opened under the condition that the access equipment is a photovoltaic system.
6. The light storing converter according to claim 4,
the light storage converter control device is used for controlling the first switch tube to be closed and the second switch tube to be opened under the condition that the access equipment is an energy storage system and the energy storage system works in a discharging state; and under the condition that the access equipment is an energy storage system and the energy storage system works in a charging state, the first switching tube is controlled to be opened and the second switching tube is controlled to be closed.
7. Light storing converter according to claim 1 or 2,
the light storage converter control device is used for adjusting the buck-boost circuit to a buck working mode under the condition that the energy storage system works in a charging state; and under the condition that the energy storage system works in a discharging state, the voltage boosting and reducing circuit is adjusted to be in a voltage boosting working mode.
8. Light storing converter according to claim 1 or 2,
the voltage and current acquisition device is connected with the front end of the breaker at the universal interface;
the voltage and current acquisition device acquires the voltage and the current of the front end of the circuit breaker at the universal interface as the voltage and the current of the universal interface.
9. A light storing converter according to claim 1 or 2, characterized in that it comprises a voltage comparator and a circuit controller, wherein:
the voltage comparator is connected with the circuit controller, the voltage comparator is connected with the voltage and current acquisition device, and the circuit controller is connected with the direct current-direct current conversion circuit;
the voltage comparator is used for judging whether the universal interface has voltage or not;
and the circuit controller is used for adjusting the direct current-direct current conversion circuit to be operated as a buck-boost circuit when the voltage comparator judges that the universal interface has no voltage.
10. The optical storage converter according to claim 9, comprising a voltage regulator and a power monitor, wherein:
the circuit controller is respectively connected with the voltage regulator and the power monitor, and the voltage regulator is connected with the power monitor;
the circuit controller is used for adjusting the direct current-direct current conversion circuit to the test operation of the booster circuit under the condition that the voltage comparator judges that the universal interface has voltage;
the voltage regulator is used for regulating the set voltage input by the universal interface;
the power monitor is used for monitoring whether the output power of the direct current-direct current conversion circuit changes corresponding to the set voltage adjustment;
the circuit controller is used for adjusting the DC-DC conversion circuit to the operation of the booster circuit under the condition that the power monitor monitors that the output power of the DC-DC conversion circuit changes corresponding to the set voltage adjustment; and under the condition that the power monitor monitors that the output power of the direct current-direct current conversion circuit does not change corresponding to the set voltage adjustment, adjusting the direct current-direct current conversion circuit in the optical storage converter to be a buck-boost circuit to operate.
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| CN202021397740.0U CN212258436U (en) | 2020-07-15 | 2020-07-15 | Light storage current transformer |
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| CN202021397740.0U CN212258436U (en) | 2020-07-15 | 2020-07-15 | Light storage current transformer |
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