CN113285622A - Photovoltaic inverter circuit, and inverter circuit multiplexing method and device - Google Patents
Photovoltaic inverter circuit, and inverter circuit multiplexing method and device Download PDFInfo
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- CN113285622A CN113285622A CN202110541462.4A CN202110541462A CN113285622A CN 113285622 A CN113285622 A CN 113285622A CN 202110541462 A CN202110541462 A CN 202110541462A CN 113285622 A CN113285622 A CN 113285622A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The embodiment of the invention provides a photovoltaic inverter circuit, and an inverter circuit multiplexing method and device, wherein the photovoltaic inverter circuit comprises: the photovoltaic module, the first inductor, the control switch module and the N-phase inverter circuit; the photovoltaic module comprises a photovoltaic module, a first inductor, a control switch module, a battery, an N-phase inverter circuit, a second inductor, a control switch module, a first inverter circuit, a second inverter circuit and a load, wherein the positive electrode of the photovoltaic module is connected with the first end of the first inductor, the second end of the first inductor is respectively connected with the first end of the N-phase inverter circuit and the first end of the control switch module, the second end of the control switch module is connected with the positive electrode of the battery, the negative electrode of the battery is connected with the negative electrode of the photovoltaic module, the second end of the N-phase inverter circuit is connected with the negative electrode of the photovoltaic module, and the output end of the N-phase inverter circuit is configured to be connected with the N-phase load; the invention solves the problems of higher cost and larger occupied volume of photovoltaic circuit devices in the related technology, reduces the number of electronic elements in the circuit and the production cost of the circuit, and reduces the volume and the mass of the device by reducing the number of the electronic elements so as to improve the power density.
Description
Technical Field
The embodiment of the invention relates to the field of photovoltaics, in particular to a photovoltaic inverter circuit, and an inverter circuit multiplexing method and device.
Background
In an existing photovoltaic circuit, in order to realize functions of charging a battery by photovoltaic, supplying power to an ac load by the battery, supplying power to the ac load by photovoltaic, and the like, a Boost circuit and an inverter circuit are generally required to be respectively provided. The boosting circuit can boost the direct-current voltage output by the photovoltaic panel to charge the battery; the inverter circuit can invert the voltage output by the battery or the voltage output by the photovoltaic panel so as to convert the direct-current voltage into alternating-current voltage to supply power to the alternating-current load. In the above circuit, the boost circuit is disposed between the photovoltaic panel and the battery, and the inverter circuit is disposed between the ac load and the photovoltaic panel or the battery. A large number of electronic devices need to be arranged in the photovoltaic circuit and the inverter circuit, so that the device cost of the photovoltaic circuit is high, and the volume of the photovoltaic device is too large due to the large number of devices.
Therefore, the photovoltaic circuit device has the problems of high cost and large occupied volume in the related art.
In view of the above problems in the related art, no effective technical solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a photovoltaic inverter circuit, and an inverter circuit multiplexing method and device, which are used for at least solving the problems of higher cost and larger occupied volume of photovoltaic circuit devices in the related technology.
According to an embodiment of the present invention, there is provided a photovoltaic inverter circuit including: the photovoltaic module, the first inductor, the control switch module and the N-phase inverter circuit; the positive electrode of the photovoltaic assembly is connected with the first end of the first inductor, the second end of the first inductor is respectively connected with the first end of the N-phase inverter circuit and the first end of the control switch module, the second end of the control switch module is connected with the positive electrode of a battery, the negative electrode of the battery is connected with the negative electrode of the photovoltaic assembly, the second end of the N-phase inverter circuit is connected with the negative electrode of the photovoltaic assembly, and the output end of the N-phase inverter circuit is configured to be connected with an N-phase load; the control switch module is used for controlling the direction of current based on the conducting state; the N-phase inverter circuit is used for inverting the direct-current voltage output by the photovoltaic module to generate an N-phase alternating-current voltage for supplying power to an N-phase load, and/or inverting the direct-current voltage output by the battery to generate an N-phase alternating-current voltage for supplying power to the N-phase load under the condition that the conduction state of the control switch module is bidirectional conduction; the N-phase inverter circuit is further used for forming a booster circuit with the first inductor and the control switch module when the control switch module is in a one-way conduction state, wherein the booster circuit is used for boosting the direct-current voltage output by the photovoltaic module, and the boosted direct-current voltage is used for charging the battery.
According to another embodiment of the present invention, there is provided an inverter circuit multiplexing method applied to the above photovoltaic inverter circuit, including: receiving a control signal output by a control signal output end; under the condition that the control signal is a first control signal, controlling an upper bridge arm and a lower bridge arm of a single-phase inverter circuit included in the N-phase inverter circuit to be simultaneously connected or simultaneously disconnected based on the first control signal so that the single-phase inverter circuit, the control switch module and the first inductor form a booster circuit to boost the direct-current voltage output by the photovoltaic module, wherein the boosted direct-current voltage is used for charging the battery; and under the condition that the control signal is a second control signal, controlling an upper bridge arm and a lower bridge arm of a single-phase inverter circuit included in the N-phase inverter circuit to be alternately conducted based on the second control signal so as to convert the direct-current voltage output by the photovoltaic module into N-phase voltage.
According to another embodiment of the present invention, there is also provided an inverter circuit multiplexing apparatus, applied to the above photovoltaic inverter circuit, including: the receiving module is used for receiving the control signal output by the control signal output end; the first control module is used for controlling an upper bridge arm and a lower bridge arm of a single-phase inverter circuit included in the N-phase inverter circuit to be simultaneously connected or simultaneously disconnected based on the first control signal under the condition that the control signal is the first control signal, so that the single-phase inverter circuit, the control switch module and the first inductor form a booster circuit to boost the direct-current voltage output by the photovoltaic module, and the boosted direct-current voltage is used for charging the battery; and the second control module is used for controlling an upper bridge arm and a lower bridge arm of a single-phase inverter circuit included in the N-phase inverter circuit to be alternately conducted based on the second control signal under the condition that the control signal is the second control signal so as to convert the direct-current voltage output by the photovoltaic module into N-phase voltage.
According to yet another embodiment of the invention, there is also provided a computer-readable storage medium having a computer program stored therein, wherein the computer program, when executed by a processor, implements the steps of the method as set forth in any of the above.
According to yet another embodiment of the present invention, there is also provided an electronic device, including a memory in which a computer program is stored and a processor configured to execute the computer program to perform the steps in any of the above method embodiments.
According to the invention, the inductor and the control switch module are arranged in the photovoltaic inverter circuit, so that part of circuits in the original three-phase inverter circuit can be multiplexed, and the photovoltaic inverter circuit, the inductor and the control switch module form the booster circuit, so that the photovoltaic module can charge the battery through the booster circuit. Compared with the mutual independence of a booster circuit and an inverter circuit in the related art, the booster circuit and the inverter circuit can reduce the number of electronic elements in the circuit and the production cost of the circuit by multiplexing the three-phase inverter circuit to realize the boosting function, and the volume and the mass of the device can be reduced by reducing the number of the electronic elements to improve the power density.
Drawings
Fig. 1 is a structural diagram of a photovoltaic inverter circuit according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a photovoltaic inverter circuit according to an exemplary embodiment of the present invention;
fig. 3 is a block diagram of a hardware structure of a mobile terminal according to an embodiment of the present invention;
FIG. 4 is a flow chart of an inverter circuit multiplexing method according to an embodiment of the invention;
fig. 5 is a block diagram of an inverter circuit multiplexing device according to an embodiment of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in conjunction with the embodiments.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
In this embodiment, a photovoltaic inverter circuit is provided, and fig. 1 is a structural diagram of a photovoltaic inverter circuit according to an embodiment of the present invention, and as shown in fig. 1, the photovoltaic inverter circuit includes:
the photovoltaic module 10, the first inductor L1, the control switch module 20 and the N-phase inverter circuit 30;
the positive electrode of the photovoltaic module 10 is connected to the first end of the first inductor L1, the second end of the first inductor L1 is connected to the first end of the N-phase inverter circuit 30 and the first end of the control switch module 20, the second end of the control switch module 20 is connected to the positive electrode of the battery 40, the negative electrode of the battery 40 is connected to the negative electrode of the photovoltaic module 10, the second end of the N-phase inverter circuit 30 is connected to the negative electrode of the photovoltaic module 10, and the output end of the N-phase inverter circuit 30 is connected to the N-phase load 50.
When the photovoltaic module 10 outputs the dc voltage to the N-phase inverter circuit 30, the dc voltage may be inverted by the N-phase inverter circuit 30 to convert the dc voltage into an ac voltage and supply power to the N-phase load 50.
The control switch module 20 may switch the direction of the current between a unidirectional conducting state and a bidirectional conducting state. When the control switch module 20 is turned on in both directions, the dc voltage output from the battery 40 may be inverted by the N-phase inverter circuit 30 to convert the dc voltage into an ac voltage and supply the N-phase load 50 with power. When the control switch module 20 is turned on in one direction, the current can flow only from the first end to the second end of the control switch module 20. At this time, by multiplexing part of the components in the N-phase inverter circuit 30, a Boost circuit can be formed together with the first inductor L1 and the control switch module 20, and the photovoltaic module 10 can also Boost the output dc voltage through the Boost circuit and charge the battery 40 through the boosted voltage. That is, both the photovoltaic module 10 and the battery 40 can supply power to the N-phase load 50 through the original circuit configuration of the N-phase inverter circuit 30, and at the same time, a part of the circuits in the N-phase inverter circuit 30, the first inductor L1, and the control switch module 20 can be reconfigured into a booster circuit by which the photovoltaic module 10 can boost the output voltage to charge the battery 40.
In the present embodiment, by providing the inductor and the control switch module 20 in the photovoltaic inverter circuit, part of the circuits in the original N-phase inverter circuit 30 can be multiplexed, and the photovoltaic module 10 can charge the battery 40 through the boost circuit by forming the boost circuit with the inductor and the control switch module 20. Compared with the prior art in which the booster circuit and the inverter circuit are independent from each other, the number of electronic components in the circuit can be reduced by multiplexing the N-phase inverter circuit 30 to realize the boosting function, the production cost of the circuit can be reduced, and the volume and the mass of the device can be reduced by reducing the number of the electronic components, so that the power density can be improved.
In one exemplary embodiment, the N-phase inverter circuit includes: each single-phase inverter circuit comprises an upper bridge arm, a lower bridge arm and a phase inductor; in each single-phase inverter circuit, the first end of the upper bridge arm is connected with the second end of the first inductor, the second end of the upper bridge arm is connected with the first end of the lower bridge arm, the second end of the lower bridge arm is connected with the negative electrode of the photovoltaic module, and the common end of the upper bridge arm and the common end of the lower bridge arm are also connected with the N-phase load through the phase inductor. In this embodiment, the N-phase inverter circuit may be a two-phase inverter circuit or a three-phase inverter circuit. When the N-phase inverter circuit is a two-phase inverter circuit, two single-phase inverter circuits may be included, and when the N-phase inverter circuit is a three-phase inverter circuit, three single-phase inverter circuits may be included. When the N-phase inverter circuit is a three-phase inverter circuit, referring to fig. 1 and 2 together, the N-phase inverter circuit 30 may include three single-phase inverter circuits 31, and each single-phase inverter circuit 31 may include an upper arm 32, a lower arm 33, and a phase inductor L. In each single-phase inverter circuit 31, a first end of the upper arm 32 is connected to a second end of the first inductor L1, a second end of the upper arm 32 is connected to a first end of the lower arm 33, a second end of the lower arm 33 is connected to a negative electrode of the photovoltaic module 10, and a common end of the upper arm 32 and the lower arm 33 is further connected to the N-phase load 50 through the phase inductor L.
In one exemplary embodiment, the upper leg comprises: a first switch device and a second switch device, wherein a first end of the first switch device is connected to a second end of the first inductor, a second end of the first switch device is connected to a first end of the second switch device, and a second end of the second switch device is connected to the N-phase load through the phase inductor; the lower bridge arm includes: the first end of the third switching device is connected with the second end of the second switching device, the second end of the third switching device is connected with the first end of the fourth switching device, and the second end of the fourth switching device is connected with the negative electrode of the photovoltaic component; controlled ends of the first switch device, the second switch device, the third switch device and the fourth switch device are respectively connected with corresponding control signal output ends, so that each switch device can adjust the on-off state according to the received control signal. In the present embodiment, when the N-phase inverter circuit is a three-phase inverter circuit, referring to fig. 2, in each single-phase inverter circuit 31, four switching devices are provided. The three single-phase inverter circuits 31 respectively correspond to the first to fourth switching devices S1 to S4, the fifth to eighth switching devices S5 to S8, and the ninth to twelfth switching devices S9 to S12.
The controlled end of each switching device is respectively connected with the corresponding control signal output end, receives the corresponding control signal and adjusts the on and off of the switching device through the received control signal. Wherein each control signal output by the control signal output terminal may be a PWM signal. The control signals received by the two switching devices of the same bridge arm are the same, and the conduction angle and the turn-off angle of the switching devices can be controlled to be 180 degrees according to the control signals. That is, when the N-phase inverter circuit is a three-phase inverter circuit, for six arms in the three-phase inverter circuit, the control signal received by each arm may be a PWM signal with a high-level continuity and a duty ratio of 50%, and the phases of the six PWM signals are sequentially different by 60 °.
In one exemplary embodiment, any one of the switching devices included in the first switching device, the second switching device, the third switching device, and the fourth switching device includes: the triode and the backward diode, wherein the collector electrode, the emitter electrode and the base electrode of the triode are respectively the first end, the second end and the controlled end of each switching device, the positive electrode of the backward diode is connected with the emitter electrode of the triode, and the negative electrode of the backward diode is connected with the collector electrode of the triode. In this embodiment, when the N-phase inverter circuit is a three-phase inverter circuit, as shown in fig. 2, each switching device may include a triode and a backward diode; the collector, emitter and base of the triode are respectively the first end, the second end and the controlled end of each switching device, the positive pole of the backward diode is connected with the emitter of the triode, and the negative pole of the backward diode is connected with the collector of the triode. The reverse diode in the switching device can play a role of follow current, when the triode is cut off, the voltage generated by the inductor in the loop is released, and the triode is prevented from being damaged by the induced potential generated by the inductor in the current loop.
In one exemplary embodiment, any one of the switching devices included in the first switching device, the second switching device, the third switching device, and the fourth switching device includes: the transistor comprises a first MOS transistor, a second MOS transistor and a third MOS transistor, wherein a body diode is arranged on the first MOS transistor; the drain electrode, the source electrode and the grid electrode of the first MOS tube are respectively a first end, a second end and a controlled end of each switching device. In this embodiment, each switching device may also be a first MOS transistor (not shown), and a body diode is disposed on the first MOS transistor. The drain electrode, the source electrode and the grid electrode of the first MOS tube are respectively a first end, a second end and a controlled end of each switching device. The body diode can play a role in follow current, follow current discharge is carried out when the triode is cut off, and the triode is prevented from being damaged by induced potential generated by inductance in a current loop.
In one exemplary embodiment, the single-phase inverter circuit further includes: a first diode and a second diode; the photovoltaic module comprises a first module and a second module, wherein the first module is connected with the second module in series, the anode of the first module is the anode of the photovoltaic module, the cathode of the second module is the cathode of the photovoltaic module, the common end of the first module and the common end of the second module are respectively connected with the anode of a first diode and the cathode of a second diode, the cathode of the first diode is connected with the common end of the first switch device and the common end of the second switch device, and the anode of the second diode is connected with the common end of the third switch device and the common end of the fourth switch device. In the present embodiment, when the N-phase inverter circuit is a three-phase inverter circuit, referring to fig. 2, each single-phase inverter circuit 31 may further include a first diode D1 and a second diode D2. The photovoltaic module 10 may include a first module and a second module, the first module being connected in series with the second module. The positive electrode of the first component is the positive electrode of the photovoltaic component 10, the negative electrode of the second component is the negative electrode of the photovoltaic component 10, the common ends of the first component and the second component are respectively connected with the positive electrode of the first diode D1 and the negative electrode of the second diode D2, the negative electrode of the first diode D1 is connected with the common ends of the first switching device S1 and the second switching device S2, and the positive electrode of the second diode D2 is connected with the common ends of the third switching device S3 and the fourth switching device S4.
In an exemplary embodiment, the N-phase inverter circuit is further configured to control an upper bridge arm and a lower bridge arm of each single-phase inverter circuit to be simultaneously turned on or simultaneously turned off according to the control signal output by the control signal output terminal, and each single-phase inverter circuit, the first inductor and the control switch module form a boost circuit when the upper bridge arm and the lower bridge arm are simultaneously turned on or simultaneously turned off.
In one exemplary embodiment, the photovoltaic inverter circuit further includes: and the negative electrode of the battery and the second end of the N-phase inverter circuit are connected with the negative electrode of the photovoltaic component through the second inductor. In this embodiment, when the N-phase inverter circuit is a three-phase inverter circuit, as shown in fig. 2, the photovoltaic inverter circuit may further include a second inductor L2, and the negative electrode of the battery 40 and the second end of the N-phase inverter circuit 30 are connected to the negative electrode of the photovoltaic module 10 through a second inductor L2.
In one exemplary embodiment, the N-phase inverter circuit includes a three-phase inverter circuit.
The control switch module 20 may be a control switch S13, and the control switch S13 may be a MOS transistor with a body diode or a triode with a backward diode. For the MOS transistor with the body diode, when the MOS transistor is turned on, the control switch S13 is turned on bidirectionally, and when the MOS transistor is turned off, the control switch S13 is turned on unidirectionally by the body diode in the current-limiting direction. Similarly, in the transistor provided with a backward diode, the control switch S13 is turned on in both directions when the transistor is turned on, and the control switch S13 is turned on in one direction when the transistor is turned off.
Further, when each single-phase inverter circuit 31 performs an inversion process, it is required to ensure that the upper bridge arm 32 and the lower bridge arm 33 are alternately turned on and cannot be turned on or turned off at the same time, so as to avoid short circuit of the photovoltaic module 10 or the battery 40 caused by simultaneous turning on. Usually, in order to ensure that the upper and lower bridge arms 33 are not turned on or turned off at the same time, it is necessary to perform "break before make", that is, for the bridge arm that should be turned off, a turn-off signal is sent first, and after the bridge arm is turned off for a certain time, a turn-on signal is sent to the other bridge arm, that is, a dead time is set between the sending of the turn-off signal and the turn-on signal.
By multiplexing the single-phase inverter circuit 31, when the upper arm 32 and the lower arm 33 of the single-phase inverter circuit 31 are turned on or turned off simultaneously, four switching devices in the upper arm 32 and the lower arm 33 can be regarded as the same switching device, and the equivalent switching device, the first inductor L1 and the control switch module 20 which is turned on in one direction can jointly form a Boost circuit. By adjusting the on-off state of the equivalent switch device, the dc voltage output by the photovoltaic module 10 can be boosted.
It is understood that each single-phase inverter circuit 31 in the N-phase inverter circuit 30 can be configured as an equivalent switching device by controlling the upper and lower arms 33 to be turned on or off simultaneously. That is, when the boost circuit is formed with the first inductor L1 and the control switch module 20, the three single-phase inverter circuits 31 can be freely selected.
Note that, since the upper and lower arms 33 are required not to be simultaneously turned on in the inversion process of the N-phase inverter circuit 30, the inversion process cannot be simultaneously realized when the N-phase inverter circuit 30 is multiplexed. That is, the N-phase inverter circuit 30 can realize only one of the inverter function and the booster function at the same time.
The method embodiments provided in the embodiments of the present application may be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking the operation on the mobile terminal as an example, fig. 3 is a hardware structure block diagram of the mobile terminal of the inverter circuit multiplexing method according to the embodiment of the present invention. As shown in fig. 3, the mobile terminal may comprise one or more (only one shown in fig. 3) processors 302 (the processor 302 may comprise, but is not limited to, a processing means such as a microprocessor MCU or a programmable logic device FPGA) and a memory 304 for storing data, wherein the mobile terminal may further comprise a transmission device 306 for communication functions and an input-output device 308. It will be understood by those skilled in the art that the structure shown in fig. 3 is only an illustration, and does not limit the structure of the mobile terminal. For example, the mobile terminal may also include more or fewer components than shown in FIG. 3, or have a different configuration than shown in FIG. 3.
The memory 304 may be used to store computer programs, for example, software programs and modules of application software, such as computer programs corresponding to the inverter circuit multiplexing method in the embodiment of the present invention, and the processor 302 executes various functional applications and data processing by running the computer programs stored in the memory 304, so as to implement the above-mentioned method. The memory 304 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 304 may further include memory located remotely from the processor 302, which may be connected to the mobile terminal through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmitting device 306 is used to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 306 includes a Network adapter (NIC) that can be connected to other Network devices through a base station to communicate with the internet. In one example, the transmitting device 306 can be a Radio Frequency (RF) module, which is used to communicate with the internet in a wireless manner.
In this embodiment, an inverter circuit multiplexing method is provided, and fig. 4 is a flowchart of the inverter circuit multiplexing method according to the embodiment of the present invention, as shown in fig. 4, the flowchart includes the following steps:
step S402, receiving the control signal output by the control signal output end;
step S404, when the control signal is a first control signal, controlling an upper bridge arm and a lower bridge arm of a single-phase inverter circuit included in the N-phase inverter circuit to be simultaneously turned on or simultaneously turned off based on the first control signal, so that the single-phase inverter circuit, the control switch module and the first inductor form a boost circuit to boost a dc voltage output by the photovoltaic module, and the boosted dc voltage is used for charging the battery;
step S406, when the control signal is a second control signal, controlling an upper bridge arm and a lower bridge arm of a single-phase inverter circuit included in the N-phase inverter circuit to be alternately turned on based on the second control signal, so as to convert the dc voltage output by the photovoltaic module into an N-phase voltage.
Alternatively, the main body of the above steps may be a switching device, but is not limited thereto.
According to the invention, when the N-phase inverter circuit operates normally, the inversion process of direct current can be realized by controlling the upper bridge arm and the lower bridge arm of each single-phase inverter circuit to be alternately conducted, and the direct current is converted into alternating current. And by multiplexing the N-phase inverter circuit, when the upper bridge arm and the lower bridge arm of a selected single-phase inverter circuit are simultaneously conducted or simultaneously cut off, the single-phase inverter circuit can be equivalent to a switching device, and forms a booster circuit with the control switch module and the first inductor, so that the direct-current voltage output by the photovoltaic module is boosted and then supplies power to the battery. Through multiplexing single-phase inverter circuit among the N looks inverter circuit, constitute the boost circuit with other components, compare and set up solitary boost circuit in photovoltaic system and can reduce the component quantity in the circuit, reduce circuit cost and circuit volume, promote photovoltaic system's power density.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
In this embodiment, an inverter circuit multiplexing apparatus is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and the descriptions already given are omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 5 is a block diagram of an inverter circuit multiplexing apparatus according to an embodiment of the present invention, and as shown in fig. 5, the apparatus includes:
a receiving module 52, configured to receive the control signal output by the control signal output terminal;
a first control module 54, configured to, when the control signal is a first control signal, control an upper bridge arm and a lower bridge arm of a single-phase inverter circuit included in the N-phase inverter circuit to be simultaneously turned on or simultaneously turned off based on the first control signal, so that the single-phase inverter circuit, the control switch module and the first inductor form a boost circuit, and boost a dc voltage output by the photovoltaic module, where the boosted dc voltage is used to charge the battery;
and a second control module 56, configured to, when the control signal is a second control signal, control, based on the second control signal, that an upper bridge arm and a lower bridge arm of a single-phase inverter circuit included in the N-phase inverter circuit are alternately turned on, so as to convert the dc voltage output by the photovoltaic module into an N-phase voltage.
The inverter circuit multiplexing device comprises a photovoltaic inverter circuit, and the structure of the photovoltaic inverter circuit can refer to the above embodiments, which are not described herein again. It should be understood that, because the photovoltaic inverter device of this embodiment adopts the technical scheme of the above-mentioned photovoltaic inverter circuit, this photovoltaic inverter device has all beneficial effects of above-mentioned photovoltaic inverter circuit.
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.
Embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method as set forth in any of the above.
In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.
In an exemplary embodiment, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary embodiments, and details of this embodiment are not repeated herein.
It will be apparent to those skilled in the art that the various modules or steps of the invention described above may be implemented using a general purpose computing device, they may be centralized on a single computing device or distributed across a network of computing devices, and they may be implemented using program code executable by the computing devices, such that they may be stored in a memory device and executed by the computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into various integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A photovoltaic inverter circuit, comprising:
the photovoltaic module, the first inductor, the control switch module and the N-phase inverter circuit;
the positive electrode of the photovoltaic assembly is connected with the first end of the first inductor, the second end of the first inductor is respectively connected with the first end of the N-phase inverter circuit and the first end of the control switch module, the second end of the control switch module is connected with the positive electrode of a battery, the negative electrode of the battery is connected with the negative electrode of the photovoltaic assembly, the second end of the N-phase inverter circuit is connected with the negative electrode of the photovoltaic assembly, and the output end of the N-phase inverter circuit is configured to be connected with an N-phase load;
the control switch module is used for controlling the direction of current based on the conducting state;
the N-phase inverter circuit is used for inverting the direct-current voltage output by the photovoltaic module to generate an N-phase alternating-current voltage for supplying power to an N-phase load, and/or inverting the direct-current voltage output by the battery to generate an N-phase alternating-current voltage for supplying power to the N-phase load under the condition that the conduction state of the control switch module is bidirectional conduction;
the N-phase inverter circuit is further used for forming a booster circuit with the first inductor and the control switch module when the control switch module is in a one-way conduction state, wherein the booster circuit is used for boosting the direct-current voltage output by the photovoltaic module, and the boosted direct-current voltage is used for charging the battery.
2. The photovoltaic inverter circuit according to claim 1, wherein the N-phase inverter circuit comprises:
each single-phase inverter circuit comprises an upper bridge arm, a lower bridge arm and a phase inductor;
in each single-phase inverter circuit, the first end of the upper bridge arm is connected with the second end of the first inductor, the second end of the upper bridge arm is connected with the first end of the lower bridge arm, the second end of the lower bridge arm is connected with the negative electrode of the photovoltaic module, and the common end of the upper bridge arm and the common end of the lower bridge arm are also connected with the N-phase load through the phase inductor.
3. The photovoltaic inverter circuit according to claim 2,
the upper bridge arm includes: a first switch device and a second switch device, wherein a first end of the first switch device is connected to a second end of the first inductor, a second end of the first switch device is connected to a first end of the second switch device, and a second end of the second switch device is connected to the N-phase load through the phase inductor;
the lower bridge arm includes: the first end of the third switching device is connected with the second end of the second switching device, the second end of the third switching device is connected with the first end of the fourth switching device, and the second end of the fourth switching device is connected with the negative electrode of the photovoltaic component;
controlled ends of the first switch device, the second switch device, the third switch device and the fourth switch device are respectively connected with corresponding control signal output ends, so that each switch device can adjust the on-off state according to the received control signal.
4. The photovoltaic inverter circuit according to claim 3, wherein any one of the first switching device, the second switching device, the third switching device, and the fourth switching device includes:
the triode and the backward diode, wherein the collector electrode, the emitter electrode and the base electrode of the triode are respectively the first end, the second end and the controlled end of each switching device, the positive electrode of the backward diode is connected with the emitter electrode of the triode, and the negative electrode of the backward diode is connected with the collector electrode of the triode.
5. The photovoltaic inverter circuit according to claim 3, wherein any one of the first switching device, the second switching device, the third switching device, and the fourth switching device includes:
the transistor comprises a first MOS transistor, a second MOS transistor and a third MOS transistor, wherein a body diode is arranged on the first MOS transistor; the drain electrode, the source electrode and the grid electrode of the first MOS tube are respectively a first end, a second end and a controlled end of each switching device.
6. The photovoltaic inverter circuit according to claim 2,
the single-phase inverter circuit further includes: a first diode and a second diode;
the photovoltaic module comprises a first module and a second module, wherein the first module is connected with the second module in series, the anode of the first module is the anode of the photovoltaic module, the cathode of the second module is the cathode of the photovoltaic module, the common end of the first module and the common end of the second module are respectively connected with the anode of a first diode and the cathode of a second diode, the cathode of the first diode is connected with the common end of the first switch device and the common end of the second switch device, and the anode of the second diode is connected with the common end of the third switch device and the common end of the fourth switch device.
7. The photovoltaic inverter circuit according to claim 3, wherein the N-phase inverter circuit is further configured to control an upper bridge arm and a lower bridge arm of each single-phase inverter circuit to be simultaneously turned on or turned off according to the control signal output by the control signal output terminal, and each single-phase inverter circuit, the first inductor and the control switch module constitute a boost circuit when the upper bridge arm and the lower bridge arm are simultaneously turned on or turned off.
8. The photovoltaic inverter circuit according to claim 1, further comprising:
and the negative electrode of the battery and the second end of the N-phase inverter circuit are connected with the negative electrode of the photovoltaic component through the second inductor.
9. The photovoltaic inverter circuit according to any one of claims 1 to 8, wherein the N-phase inverter circuit comprises a three-phase inverter circuit.
10. An inverter circuit multiplexing method applied to the photovoltaic inverter circuit according to any one of claims 1 to 9, comprising:
receiving a control signal output by a control signal output end;
under the condition that the control signal is a first control signal, controlling an upper bridge arm and a lower bridge arm of a single-phase inverter circuit included in the N-phase inverter circuit to be simultaneously connected or simultaneously disconnected based on the first control signal so that the single-phase inverter circuit, the control switch module and the first inductor form a booster circuit to boost the direct-current voltage output by the photovoltaic module, wherein the boosted direct-current voltage is used for charging the battery;
and under the condition that the control signal is a second control signal, controlling an upper bridge arm and a lower bridge arm of a single-phase inverter circuit included in the N-phase inverter circuit to be alternately conducted based on the second control signal so as to convert the direct-current voltage output by the photovoltaic module into N-phase voltage.
11. An inverter circuit multiplexing device applied to the photovoltaic inverter circuit according to any one of claims 1 to 9, comprising:
the receiving module is used for receiving the control signal output by the control signal output end;
the first control module is used for controlling an upper bridge arm and a lower bridge arm of a single-phase inverter circuit included in the N-phase inverter circuit to be simultaneously connected or simultaneously disconnected based on the first control signal under the condition that the control signal is the first control signal, so that the single-phase inverter circuit, the control switch module and the first inductor form a booster circuit to boost the direct-current voltage output by the photovoltaic module, and the boosted direct-current voltage is used for charging the battery;
and the second control module is used for controlling an upper bridge arm and a lower bridge arm of a single-phase inverter circuit included in the N-phase inverter circuit to be alternately conducted based on the second control signal under the condition that the control signal is the second control signal so as to convert the direct-current voltage output by the photovoltaic module into N-phase voltage.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050104540A1 (en) * | 2003-11-14 | 2005-05-19 | Intersil Americas Inc. | Multiplexed high voltage dc-ac driver |
| US20090027933A1 (en) * | 2007-07-27 | 2009-01-29 | Kajouke Lateef A | Voltage link control of a dc-ac boost converter system |
| CN201937494U (en) * | 2010-11-18 | 2011-08-17 | 佛山市新光宏锐电源设备有限公司 | Multiplexing inverse circuit for charging inverter |
| CN110474605A (en) * | 2019-08-21 | 2019-11-19 | 威胜集团有限公司 | Switch multiplexing type photovoltaic energy storage inverter circuit and inverter |
| CN111600502A (en) * | 2020-05-27 | 2020-08-28 | 南通大学 | CCM single-bridge-arm integrated single-phase boost inverter and control method |
| CN113141156A (en) * | 2021-04-16 | 2021-07-20 | 威胜集团有限公司 | Photovoltaic inverter circuit, photovoltaic inverter device and three-phase inverter circuit multiplexing method |
| CN214544231U (en) * | 2021-04-16 | 2021-10-29 | 威胜集团有限公司 | Photovoltaic inverter circuit and device |
-
2021
- 2021-05-18 CN CN202110541462.4A patent/CN113285622A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050104540A1 (en) * | 2003-11-14 | 2005-05-19 | Intersil Americas Inc. | Multiplexed high voltage dc-ac driver |
| US20090027933A1 (en) * | 2007-07-27 | 2009-01-29 | Kajouke Lateef A | Voltage link control of a dc-ac boost converter system |
| CN201937494U (en) * | 2010-11-18 | 2011-08-17 | 佛山市新光宏锐电源设备有限公司 | Multiplexing inverse circuit for charging inverter |
| CN110474605A (en) * | 2019-08-21 | 2019-11-19 | 威胜集团有限公司 | Switch multiplexing type photovoltaic energy storage inverter circuit and inverter |
| CN111600502A (en) * | 2020-05-27 | 2020-08-28 | 南通大学 | CCM single-bridge-arm integrated single-phase boost inverter and control method |
| CN113141156A (en) * | 2021-04-16 | 2021-07-20 | 威胜集团有限公司 | Photovoltaic inverter circuit, photovoltaic inverter device and three-phase inverter circuit multiplexing method |
| CN214544231U (en) * | 2021-04-16 | 2021-10-29 | 威胜集团有限公司 | Photovoltaic inverter circuit and device |
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