WO2022121890A1 - 一种供电系统及太阳能光伏逆变器 - Google Patents

一种供电系统及太阳能光伏逆变器 Download PDF

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Publication number
WO2022121890A1
WO2022121890A1 PCT/CN2021/136053 CN2021136053W WO2022121890A1 WO 2022121890 A1 WO2022121890 A1 WO 2022121890A1 CN 2021136053 W CN2021136053 W CN 2021136053W WO 2022121890 A1 WO2022121890 A1 WO 2022121890A1
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Prior art keywords
module
rectifier
inverter
power supply
output
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PCT/CN2021/136053
Other languages
English (en)
French (fr)
Inventor
杨永春
华国勇
祁飚杰
罗宇浩
Original Assignee
昱能科技股份有限公司
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Application filed by 昱能科技股份有限公司 filed Critical 昱能科技股份有限公司
Priority to EP21902595.4A priority Critical patent/EP4258533A1/en
Priority to US18/265,946 priority patent/US20240039289A1/en
Publication of WO2022121890A1 publication Critical patent/WO2022121890A1/zh

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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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
    • 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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • 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
    • 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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/007—Plural converter units in cascade
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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
    • 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
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • 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
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • 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
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/05—Capacitor coupled rectifiers
    • 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
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • 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

Definitions

  • the invention relates to the field of photovoltaics, in particular to a power supply system and a solar photovoltaic inverter.
  • FIG. 1 is a schematic diagram of a solar photovoltaic inverter in the prior art provided by the present invention.
  • the output end of the solar panel is sequentially connected to a DC conversion switch module, a main transformer, and a first rectifier module.
  • the DC conversion switch module is used to boost the DC power at the input end of the DC conversion switch module and convert it into high-frequency AC power
  • the main transformer is used to boost the high-frequency AC power and perform high-voltage isolation
  • the first rectifier module uses It is used to rectify the alternating current output from the transformer to direct current.
  • the DC conversion switch module needs to be driven by a DC drive module
  • the first rectifier module needs to be driven by a rectifier drive module
  • the inverter module needs to be driven by an inverter drive module
  • the drive modules all need power supply
  • other circuits such as solar inverters
  • the circuit on the primary side of the main transformer is used as the DC side circuit
  • the circuit on the secondary side of the main transformer is used as the AC side circuit, that is, both the DC side circuit and the AC side circuit also need power supply .
  • an auxiliary power supply is used to supply power.
  • the auxiliary power supply includes a switch circuit, a transformer, a second rectifier module and a third rectifier module.
  • the input end of the switch circuit is connected to the output end of the solar panel for connecting the
  • the DC power output from the solar panel is converted into AC power
  • the transformer is used for high-voltage isolation, and the AC power output from the switching circuit is separately regulated through the coil, and the second rectifier module supplies power to the DC drive module and other DC side circuits.
  • the third rectifier module to supply power to the rectifier drive module, the AC drive module and other AC side circuits.
  • the switches in the switch circuit need to be turned on or off frequently, and the power consumption is large and noise is easily generated.
  • the cost of the transformer is relatively large.
  • the purpose of the present invention is to provide a power supply system and a solar photovoltaic inverter, which do not require additional auxiliary power supply for high-voltage isolation, that is, do not need to additionally provide a switch circuit, a transformer, a second rectifier module and a third rectifier module, thereby avoiding Noise and power consumption caused by frequent turn-on or turn-off of switching circuits are eliminated, and costs are reduced because additional transformers are not required for high-voltage isolation.
  • the present invention provides a power supply system, which is applied to a solar photovoltaic inverter, and the solar photovoltaic inverter includes a DC conversion switch module, a main transformer, a rectifier module and an inverter module connected in sequence; and It includes a DC drive module, a rectifier drive module and an inverter drive module; the system includes:
  • the input end is connected to the output end of the solar panel, and the output end is connected to the DC/DC module of the DC drive module, which is used for voltage regulation of the DC power output by the solar panel to be the DC drive module and the DC side circuit powered by;
  • the input end is connected with the output end of the main transformer, and the output end is connected with the rectifier module of the inverter drive module, which is used to rectify the alternating current output by the main transformer to be the inverter drive module and the rectifier drive module.
  • Module and AC side circuit power supply are used to rectify the alternating current output by the main transformer to be the inverter drive module and the rectifier drive module.
  • it also includes:
  • a voltage divider module arranged between the main transformer and the rectifier module is used for step-down processing of the alternating current output from the main transformer.
  • it also includes:
  • an energy storage module connected to the rectifier module and the inverter drive module respectively, and used for the inverter drive module, the rectifier drive module and the AC when the output end of the rectifier module stops outputting power side circuit power supply;
  • the rectification module is also used for rectifying the alternating current output from the main transformer to charge the energy storage module.
  • the inverter module is a bridge inverter circuit
  • the inverter drive module includes:
  • the input end is connected with the output end of the rectifier module, and the input end is connected with the upper bridge arm of the bridge inverter circuit, and the upper tube driving module is used for driving the upper bridge arm of the bridge inverter circuit;
  • the input end is connected with the output end of the rectifier module, and the input end is connected with the lower bridge arm of the bridge inverter circuit, and the lower tube driving module is used for driving the lower bridge arm of the bridge inverter circuit;
  • the bootstrap circuit disposed between the rectifier module and the upper tube driving module is used for boosting the power supply at the output end of the rectification module to supply power to the upper tube driving module.
  • the bootstrap circuit includes a diode, a first capacitor and a voltage regulator;
  • the anode of the diode is connected to the output end of the rectifier module, and the cathode of the diode is connected to one end of the first capacitor, one end of the voltage regulator tube and the input end of the upper tube driving module, respectively.
  • the other end of a capacitor is respectively connected with the other end of the voltage regulator tube, the ground end of the upper tube driving module and the connection between the upper bridge arm and the lower bridge arm in the bridge inverter circuit.
  • the upper bridge arm and the lower bridge arm of the bridge inverter circuit are M, and M is not less than 2;
  • the number of the upper tube driving modules is M, and corresponds to the M upper bridge arms one-to-one;
  • the number of the lower tube driving modules is M, and one-to-one correspondence with the M lower bridge arms;
  • the number of the bootstrap circuits is M, and corresponds to the M number of the upper-tube driving modules one-to-one.
  • the energy storage module is a second capacitor, and further includes a first resistor, a second resistor, a third resistor, a fourth resistor and a Zener diode;
  • the first end of the first resistor is connected to the output end of the rectifier module, the second end of the first resistor is connected to the first end of the zener diode, and the second end of the zener diode is connected
  • the terminals are respectively connected to one end of the second capacitor, the first end of the third resistor and the first end of the fourth resistor, and the third end of the Zener diode is connected to the second end of the third resistor.
  • the terminal is connected to the first terminal of the second resistor, and the first terminal of the second resistor is respectively connected to the other terminal of the second capacitor and the second terminal of the fourth resistor.
  • both the DC conversion switch modules and the main transformers are N, and N is not less than 2; it also includes:
  • N voltage divider modules corresponding to the N main transformers one-to-one, the input ends of the N voltage divider modules are respectively connected with the output ends of the corresponding main transformers, and the output ends are connected in parallel with the input of the rectifier module. end connection;
  • the rectification module is specifically configured to rectify the alternating currents output by the N voltage divider modules.
  • it also includes:
  • N current limiting modules respectively connected to the output ends of the N voltage dividing modules, for limiting the charging current of the energy storage modules.
  • the present application also provides a solar photovoltaic inverter, which includes the power supply system described above, and also includes a DC conversion switch module, a main transformer, an inverter module, a DC drive module, and a rectifier drive connected in sequence. modules and inverter drive modules;
  • the main transformer is used for high-voltage isolation and boosting the high-frequency alternating current
  • the rectification module is used to rectify the alternating current output by the main transformer into direct current
  • the inverter module is used to invert the output of the rectifier module to supply power to the load;
  • the rectifier drive module used for driving the rectifier module
  • the inverter driving module is used for driving the inverter module.
  • the power supply at the output end of the solar panel can directly supply power to the DC drive module and the DC side circuit through voltage regulation; since the power output from the main transformer is high-voltage power, Therefore, the AC power output from the main transformer can directly supply power to the rectifier drive module, the inverter drive module and the AC side circuit through the rectifier module, without additional auxiliary power supply for high-voltage isolation, that is, no additional switch circuit, transformer, first
  • the second rectifier module and the third rectifier module avoid noise and power consumption caused by frequent switching on or off of the switching circuit, and reduce the cost because an additional transformer is not required for high-voltage isolation.
  • the present invention also provides a solar photovoltaic inverter, which has the same beneficial effects as the power supply system described above.
  • FIG. 1 is a schematic diagram of a solar photovoltaic inverter in the prior art provided by the present invention
  • FIG. 4 is a partial structural block diagram of the first power supply system provided by the present invention.
  • FIG. 5 is a partial structural block diagram of a second power supply system provided by the present invention.
  • FIG. 6 is a schematic diagram of a partial circuit connection of a second power supply system provided by the present invention.
  • FIG. 7 is a schematic diagram of partial circuit connection of a third power supply system provided by the present invention.
  • the core of the present invention is to provide a power supply system and a solar photovoltaic inverter, which does not require additional auxiliary power supply for high-voltage isolation, that is, does not require additionally configuring a switch circuit, a transformer, a second rectifier module and a third rectifier module, avoiding the need for additional Noise and power consumption caused by frequent turn-on or turn-off of switching circuits are eliminated, and costs are reduced because additional transformers are not required for high-voltage isolation.
  • FIG. 2 is a structural block diagram of a power supply system provided by the present invention.
  • the system is applied to a solar photovoltaic inverter.
  • the solar photovoltaic inverter includes a DC transfer switch module, a main transformer, a rectifier module and a Inverter module; also includes DC drive module, rectifier drive module and inverter drive module; the system includes:
  • the input end is connected to the output end of the solar panel, and the output end is connected to the DC/DC (DC-DC converter, DC/DC converter) module 1, which is used to adjust the voltage of the direct current output by the solar panel to be DC drive module and DC side circuit power supply;
  • DC/DC DC-DC converter, DC/DC converter
  • the input end is connected to the output end of the main transformer, and the output end is connected to the rectifier module 2 of the inverter drive module, which is used to rectify the AC power output by the main transformer to supply power to the inverter drive module and the AC side circuit.
  • the solar photovoltaic inverter includes a DC transfer switch module, a main transformer, a rectifier module and an inverter module that are connected in sequence, wherein the DC transfer switch module is a high-frequency switch that boosts the DC voltage output by the solar panel; the main transformer performs high-voltage isolation
  • the rectifier module rectifies the AC power output by the main transformer into DC power; the inverter module inverts the output of the rectifier module to supply power to the load; the DC drive module is used to drive the DC conversion switch module; the rectifier drive module is used to drive the rectifier module
  • the inverter drive module is used to drive the inverter module, and the drive module, the DC side circuit and the AC side circuit all need power supply.
  • an auxiliary power supply is used to supply power.
  • the auxiliary power supply includes a switch circuit, a transformer, The second rectifier module and the third rectifier module, however, in the process of power supply, the switches in the switch circuit need to be frequently turned on or off, the power consumption is large and noise is easily generated, in addition, the cost of the transformer is high.
  • the design idea of the present application is as follows: considering that the power output of the solar panel is low-voltage electricity, generally 20-60V, and the power supply of the output end of the main transformer is high-voltage electricity, generally 300-400V, then
  • the low-voltage power output from the solar panel can be regulated to supply power to the DC drive module, and the high-voltage power at the output of the main transformer can be processed to supply power to the inverter drive module, so there is no need to isolate the power supply modules. That is, there is no need to additionally provide an auxiliary power supply including a switch circuit, a transformer, a second rectifier module and a third rectifier module.
  • the present application sets up a DC/DC module 1, which regulates the low-voltage DC power output by the solar panel to supply power to the DC drive module and the DC side circuit, wherein the DC side circuit requires DC on the primary side of the main transformer.
  • a power supply circuit; a rectifier module 2 is also provided to rectify the AC power at the output end of the main transformer to supply power to the inverter drive module, the rectifier drive module and the AC side circuit, wherein the AC side circuit needs a DC power supply circuit on the secondary side of the main transformer .
  • the rectifier module 2 may be a rectifier module 2 that can realize both a rectification function and a step-down function.
  • FIG. 3 is a schematic diagram of the circuit connection of the first partial power supply system provided by the present invention.
  • the rectifier module here may include a first diode, a second diode, a third capacitor and a fourth capacitor.
  • the anode of the first diode is respectively connected to the output positive terminal of the main transformer and the second and second The cathode of the pole tube is connected, the cathode of the first diode is connected to the first end of the third capacitor, the second end of the third capacitor is respectively connected to the first end of the fourth capacitor and the output negative end of the main transformer, the second The anode of the diode is connected to the second end of the fourth capacitor.
  • the rectifier module does not need a rectifier drive module, and the power output from the rectifier module does not need to supply power to the rectifier drive module.
  • the power at the output end of the solar panel can directly supply power to the DC drive module and the DC side circuit through voltage regulation; since the power output from the main transformer is high-voltage power Therefore, the AC power output by the main transformer can directly supply power to the inverter drive module, the rectifier drive module and the AC side circuit through the rectifier module 2, and no additional auxiliary power supply is required for high-voltage isolation, that is, no additional switch circuit and transformer are required.
  • the second rectifier module and the third rectifier module avoid the noise and power consumption caused by the frequent switching on or off of the switching circuit, and reduce the cost because an additional transformer is not required for high-voltage isolation.
  • FIG. 4 is a partial structural block diagram of the first power supply system provided by the present invention.
  • it also includes:
  • the voltage divider module 3 arranged between the main transformer and the rectifier module 2 is used for step-down processing of the alternating current output by the main transformer.
  • the AC voltage at the output end of the main transformer in the solar photovoltaic inverter is high-voltage electricity
  • a voltage divider module 3 in the rectifier module 2 which is used to step down the AC power output by the main transformer.
  • Some rectifier modules 2 may not have the voltage divider module 3 , which may cause damage to the rectifier module 2 .
  • the present application further provides a voltage divider module 3 between the rectifier module 2 and the main transformer, which is used for step-down processing of the high-voltage alternating current output from the main transformer.
  • the voltage dividing module 3 in this application includes two capacitors, one end of the two capacitors is respectively connected to the input positive end and the input negative end of the main transformer, and the other end of the two capacitors is respectively connected to the input end of the rectifier module 2 , is used to share the output voltage of the main transformer with the energy storage module 4, limit the charging voltage of the energy storage module 4, and prevent the energy storage module 4 from being damaged.
  • a voltage divider module 3 is set between the main transformer and the rectifier module 2, which can realize the effect of reducing the AC power at the output end of the main transformer, ensure the safety and reliability of the system, and prevent the energy storage module. 4 is damaged.
  • it also includes:
  • the energy storage module 4 connected to the rectifier module 2 and the inverter drive module respectively is used to supply power to the inverter drive module, the rectifier drive module and the AC side circuit when the output end of the rectifier module 2 stops outputting power;
  • the rectifier module 2 is also used to rectify the alternating current output from the main transformer to charge the energy storage module 4 .
  • the present application also provides an energy storage module 4 respectively connected to the output end of the rectifier module 2 and the inverter drive module.
  • the rectifier module 2 not only supplies power to the inverter drive module, the rectifier drive module and the AC side circuit, but also charges the energy storage module 4; there is no power output or output power at the output end of the rectifier module 2
  • the energy storage module 4 supplies power to the inverter drive module, the rectifier drive module and the AC side circuit, ensuring that the output end of the rectifier module 2 cannot supply power.
  • the inverter drive module, the rectifier drive module and the AC side circuit can still work normally, which ensures the efficiency of the inverter module.
  • the energy storage module 4 in this application may be a capacitor. Specifically, when the energy storage module 4 is a capacitor, both ends of the energy storage module 4 are connected in parallel between the output end of the rectifier module 2 and the inverter drive module. between.
  • the energy storage module 4 in the present application is not limited to being a capacitor, but may also be a battery or other energy storage module 4 with an energy storage function, which is not specifically limited in this application.
  • the inverter module is a bridge inverter circuit
  • the inverter drive module includes:
  • the input end is connected with the output end of the rectifier module 2, and the input end is connected with the upper bridge arm of the bridge inverter circuit, and the upper tube drive module is used to drive the upper bridge arm of the bridge inverter circuit;
  • the input end is connected with the output end of the rectifier module 2, and the input end is connected with the lower bridge arm of the bridge inverter circuit, and the lower tube driving module is used to drive the lower bridge arm of the bridge inverter circuit;
  • the bootstrap circuit 5 disposed between the rectifier module and the upper tube driving module is used for boosting the power supply at the output end of the rectification module 2 to supply power to the upper tube driving module.
  • the inverter module is a bridge inverter circuit
  • the ground end of the lower bridge arm of the bridge inverter circuit is a stable ground end
  • the upper bridge arm of the bridge inverter circuit is due to the conduction or It is turned off so that the ground terminal of the upper bridge arm is an unstable ground terminal.
  • the inverter drive module in this application when the inverter module in this application is a bridge inverter circuit, the inverter drive module in this application includes an upper tube drive module and a lower tube drive module, which respectively drive the bridge inverter circuit.
  • the upper bridge arm and the lower bridge arm, at this time, the upper tube drive module and the upper bridge arm share the same ground, that is, the ground end of the upper tube drive module is also an unstable ground end.
  • the use of the bootstrap circuit 5 can increase the voltage of the input terminal of the upper tube drive module, thereby ensuring the reliability of the power supply of the upper tube drive module and the reliability of the inverter circuit operation. .
  • the bootstrap circuit 5 includes a diode, a first capacitor and a voltage regulator;
  • the anode of the diode is connected to the output end of the rectifier module 2
  • the cathode of the diode is respectively connected to one end of the first capacitor, one end of the voltage regulator tube and the input end of the upper tube drive module, and the other end of the first capacitor is respectively connected to the voltage regulator
  • the other end of the tube is connected with the ground end of the upper tube drive module and the connection between the upper bridge arm and the lower bridge arm in the bridge inverter circuit.
  • the purpose of this embodiment is to provide a specific implementation of the bootstrap circuit 5. Please refer to FIG. 4 for details.
  • the bootstrap circuit 5 includes a diode, a first capacitor and a voltage regulator.
  • the bootstrap circuit 5 uses a capacitor that cannot suddenly change
  • the rectifier module 2 charges the first capacitor through the diode. After the first capacitor is charged, the output positive terminal of the upper-tube drive module is always maintained at the voltage after the first capacitor is fully charged, thus ensuring that the upper-tube drive module is fully charged.
  • the upper bridge arm of the bridge inverter circuit can be driven accurately, which ensures the reliability of the power supply end of the inverter drive module.
  • the bridge inverter circuit in this application can be a half-bridge inverter circuit, a full-bridge inverter circuit, or other bridge inverter circuits, as long as the high-voltage direct current output by the rectifier module in the application can be completed for inversion. That is, the present application does not make any special limitation here.
  • the upper bridge arm and the lower bridge arm of the bridge inverter circuit in this application may be triodes or MOS transistors, or other controllable switches, and the upper bridge arms include a first controllable switch and a third diode.
  • the lower bridge arm includes a second controllable switch and a fourth diode as an example, the first end of the first controllable switch is connected to the output positive end of the rectifier module and the cathode of the third diode, and the first controllable switch is connected to the cathode of the third diode.
  • the second end of the second controllable switch is respectively connected to the first end of the second controllable switch, the anode of the third diode and the cathode of the fourth diode, and the control end of the first controllable switch is connected to the output end of the upper tube drive module , the second end of the second controllable switch is respectively connected with the anode of the fourth diode and the output negative end (ie the ground end) of the rectifier module, and the control end of the second controllable switch is connected with the output end of the lower tube driving module connect.
  • the first controllable switch and the second controllable switch may be, but are not limited to, both PMOS (positive channel Metal Oxide Semiconductor, P-channel metal-oxide semiconductor field effect transistor) transistors.
  • the upper bridge arm and the lower bridge arm of the bridge inverter circuit are M, and M is not less than 2;
  • the number of down tube driving modules is M, and they correspond to the M lower bridge arms one-to-one;
  • the number of bootstrap circuits 5 is M, and corresponds to the M upper-tube driving modules one-to-one.
  • the present application also sets M bootstrap circuits 5 to supply power to the M upper-tube driving modules, thereby ensuring the reliability of the power supply terminals of the upper-tube driving modules, thereby ensuring the reliability of the upper-tube driving module driving the upper bridge arm. sex.
  • the energy storage module 4 is a second capacitor, and further includes a first resistor, a second resistor, a third resistor, a fourth resistor and a Zener diode;
  • the first end of the first resistor is connected to the output end of the rectifier module 2, the second end of the first resistor is connected to the first end of the zener diode, and the second end of the zener diode is respectively connected to one end of the second capacitor,
  • the first end of the third resistor is connected to the first end of the fourth resistor, the third end of the Zener diode is connected to the second end of the third resistor and the first end of the second resistor, and the first ends of the second resistor are respectively It is connected to the other end of the second capacitor and the second end of the fourth resistor.
  • the energy storage module 4 When the energy storage module 4 is the second capacitor, the energy storage module 4 is connected in parallel to the output end of the energy storage module 4, that is, one end of the first capacitor is connected to the output end of the energy storage module 4, and the other end of the energy storage module 4 is grounded , at this time, it also includes a first resistor, a second resistor, a third resistor, a fourth resistor and a zener diode, wherein the first resistor is a current limiting resistor, which is used to prevent the zener diode from overcurrent; the second resistor and the third resistor The third resistor is the reference voltage dividing resistor, which is used to divide the voltage across the second capacitor; the Zener diode is a voltage limiting device, which is used to limit the voltage of the third resistor to ensure the safety and reliability of the circuit; the fourth resistor For the equivalent load, other chips in the system can be directly driven, and the bootstrap circuit 5 can also be connected to supply power to the upper tube driving module.
  • N there are N DC transfer switch modules and main transformers, and N is not less than 2; it also includes:
  • N voltage divider modules 3 corresponding to the N main transformers one-to-one, the input ends of the N voltage divider modules 3 are respectively connected with the output ends of the corresponding main transformers, and the output ends are connected in parallel with the input end of the rectifier module 2;
  • the rectifying module 2 is specifically used to rectify the alternating currents output by the N voltage dividing modules 3 .
  • FIG. 6 is a schematic diagram of the circuit connection of the second partial power supply system provided by the present invention, wherein, the number of the main transformer is 2, the number of rectifier modules 2 is one, and one rectifier module 2 is used to The alternating current output by each voltage dividing module 3 is rectified, and there is no need to set up multiple rectification modules 2, which saves the cost of components and wiring.
  • the rectifier modules 2 in the present application can also rectify the AC power output by the corresponding voltage divider modules 3 through the respective rectifier modules 2.
  • FIG. 7 is a schematic diagram of the third power supply system provided by the present invention. Part of the circuit connection diagram, wherein, the number of main transformers is two, and the number of rectifier modules 2 is two. When two rectifier modules 2 are used for rectification, the rectification efficiency is improved.
  • it also includes:
  • the N current limiting modules 6 are respectively connected to the output ends of the N voltage dividing modules 3 for limiting the charging current of the energy storage module 4 .
  • N current limiting modules 6 are respectively set at the output ends of the N voltage divider modules 3 to limit the energy storage. The charging current of the module 4, so as to prevent the energy storage module 4 from being damaged.
  • the current limiting module 6 in this application may include a plurality of diodes, please refer to FIG. 6 .
  • the specific implementation of the current limiting module 6 in this application is not limited to the above examples, and may also be other devices with current limiting function. , this application does not make any special limitation here.
  • the present application also provides a solar photovoltaic inverter, which includes the above power supply system, and also includes a DC conversion switch module, a main transformer, an inverter module, a DC drive module, a rectifier drive module, and a DC drive module, which are connected in sequence.
  • Inverter drive module ;
  • the DC conversion switch module is used to boost the DC power at the output end of the solar panel and convert it into high-frequency AC power;
  • the rectifier module is used to rectify the alternating current output by the main transformer into direct current
  • the inverter module is used to invert the output of the rectifier module to supply power to the load;
  • the DC drive module is used to drive the DC transfer switch module
  • the rectifier drive module is used to drive the rectifier module
  • the inverter drive module is used to drive the inverter module.
  • the present application also provides a solar photovoltaic inverter, which has the same beneficial effects as the power supply system described above, which will not be repeated in the present application.

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Abstract

一种供电系统及太阳能光伏逆变器，包括DC/DC模块及整流模块。由于本申请中太阳能电池板输出的电源为低压电，则太阳能电池板的输出端的电源通过DC/DC模块调压可以直接为直流驱动模块及直流侧电路供电；由于主变压器输出的电源为高压电，则将主变压器输出的交流电通过整流模块可以直接为逆变驱动模块、整流驱动模块及交流侧电路供电，不需要额外设置辅助电源以进行高压隔离，也即不需要额外设置开关电路、变压器、第二整流模块及第三整流模块，避免了由于使用开关电路的频繁开通或关断造成的噪声及功耗，降低了成本。

Description

一种供电系统及太阳能光伏逆变器
本申请要求于2020年12月07日提交至中国专利局、申请号为202011419207.4、发明名称为“一种供电系统及太阳能光伏逆变器”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及光伏领域，特别是涉及一种供电系统及太阳能光伏逆变器。
背景技术
请参照图1，图1为本发明提供的一种现有技术中的太阳能光伏逆变器的示意图，具体地，太阳能电池板的输出端依次连接直流转换开关模块、主变压器、第一整流模块，用于将太阳能电池板输出的直流电进行升压以达到逆变模块的逆变输入电压。具体地，直流转换开关模块用于将直流转换开关模块的输入端的直流电进行升压并转换为高频交流电，主变压器用于进行对高频交流电进行升压并进行高压隔离，第一整流模块用于将变压器输出的交流电整流为直流电。其中，直流转换开关模块需要直流驱动模块进行驱动，第一整流模块需要整流驱动模块进行驱动，逆变模块需要逆变驱动模块进行驱动，且驱动模块均需要供电，且其他电路(比如太阳能逆变器中的通信模块、显示电路等)，将主变压器原边侧的电路作为直流侧电路，将主变压器副边侧的电路作为交流侧电路，也即直流侧电路与交流侧电路也均需要供电。现有技术中采用辅助电源对其进行供电，具体地，辅助电源包括开关电路、变压器、第二整流模块及第三整流模块，开关电路的输入端与太阳能电池板的输出端连接，用于将太阳能电池板输出的直流电源变换为交流电源，变压器用于进行高压隔离，并对开关电路输出的交流电源通过线圈分别进行调压，并通过第二整流模块为直流驱动模块和其他直流侧电路供电，通过第三整流模块为整流驱动模块、交流驱动模块和其他交流侧电路供电，在供电的过程中，开关电路中的开关需要频繁的进行开通或关断，功耗较大且容易产生噪声，此外，变压器的成本较大。
发明内容
本发明的目的是提供一种供电系统及太阳能光伏逆变器，不需要额外设置辅助电源以进行高压隔离，也即不需要额外设置开关电路、变压器、第二整流模块及第三整流模块，避免了由于使用开关电路的频繁开通或关断造成的噪声及功耗，且由于不需要额外使用变压器进行高压隔离，降低了成本。
为解决上述技术问题，本发明提供了一种供电系统，应用于太阳能光伏逆变器，所述太阳能光伏逆变器包括依次连接的直流转换开关模块、主变压器、整流模块及逆变模块；还包括直流驱动模块、整流驱动模块及逆变驱动模块；该系统包括：
输入端与太阳能电池板的输出端连接，输出端与所述直流驱动模块连接的DC/DC模块，用于将所述太阳能电池板输出的直流电进行调压以为所述直流驱动模块及直流侧电路供电；
输入端与所述主变压器的输出端连接，输出端与所述逆变驱动模块连接的整流模块，用于将所述主变压器输出的交流电进行整流以为所述逆变驱动模块、所述整流驱动模块及交流侧电路供电。
优选地，还包括：
设置于所述主变压器与所述整流模块之间的分压模块，用于将所述主变压器输出的交流电进行降压处理。
优选地，还包括：
分别与所述整流模块及所述逆变驱动模块连接的储能模块，用于在所述整流模块的输出端停止输出电源时为所述逆变驱动模块、所述整流驱动模块及所述交流侧电路供电；
所述整流模块还用于将所述主变压器输出的交流电进行整流以为所述储能模块充电。
优选地，所述逆变模块为桥式逆变电路；
所述逆变驱动模块包括：
输入端与所述整流模块的输出端连接，输入端与所述桥式逆变电路的上桥臂连接的上管驱动模块，用于驱动所述桥式逆变电路的上桥臂；
输入端与所述整流模块的输出端连接，输入端与所述桥式逆变电路的下桥臂连接的下管驱动模块，用于驱动所述桥式逆变电路的下桥臂；
还包括：
设置于所述整流模块与所述上管驱动模块之间的自举电路，用于将所述整流模块输出端的电源进行升压处理以为所述上管驱动模块供电。
优选地，所述自举电路包括二极管、第一电容及稳压管；
其中，二极管的阳极与所述整流模块的输出端连接，二极管的阴极分别与所述第一电容的一端、所述稳压管的一端及所述上管驱动模块的输入端连接，所述第一电容的另一端分别与稳压管的另一端及上管驱动模块的地端及桥式逆变电路中上桥臂和下桥臂的连接处连接。
优选地，所述桥式逆变电路的上桥臂及下桥臂均为M个，M不小于2；
所述上管驱动模块为M个，且与M个所述上桥臂一一对应；
所述下管驱动模块为M个，且与M个所述下桥臂一一对应；
所述自举电路为M个，且与M个所述上管驱动模块一一对应。
优选地，所述储能模块为第二电容，还包括第一电阻、第二电阻、第三电阻、第四电阻及稳压二极管；
其中，所述第一电阻的第一端与所述整流模块的输出端连接，所述第一电阻的第二端与所述稳压二极管的第一端连接，所述稳压二极管的第二端分别与所述第二电容的一端、所述第三电阻的第一端及所述第四电阻的第一端连接，所述稳压二极管的第三端与所述第三电阻的第二端及所述第二电阻的第一端连接，所述第二电阻的第一端分别与所述第二电容的另一端及所述第四电阻的第二端连接。
优选地，所述直流转换开关模块及所述主变压器均为N个，N不小于2；还包括：
与N个所述主变压器一一对应的N个分压模块，N个所述分压模块的输入端分别与对应的主变压器的输出端连接，输出端并联后并与所述整流模块的输入端连接；
所述整流模块具体用于对N个所述分压模块输出的交流电进行整流。
优选地，还包括：
一一分别与N个所述分压模块的输出端连接的N个限流模块，用于限制所述储能模块的充电电流。
为解决上述技术问题，本申请还提供了一种太阳能光伏逆变器，包括上述所述的供电系统，还包括依次连接的直流转换开关模块、主变压器、逆变模块及直流驱动模块、整流驱动模块和逆变驱动模块；
其中，所述直流转换开关模块，用于对太阳能电池板的输出端的直流电进行升压并转换为高频交流电；
所述主变压器，用于进行高压隔离，并对所述高频交流电进行升压；
所述整流模块，用于将所述主变压器输出的交流电整流为直流电；
所述逆变模块，用于将所述整流模块输出的进行逆变以为负载供电；
所述直流驱动模块，用于驱动所述直流转换开关模块和直流侧电路；
所述整流驱动模块，用于驱动所述整流模块；
所述逆变驱动模块，用于驱动所述逆变模块。
本发明提供了一种供电系统，包括DC/DC模块及整流模块，其中，DC/DC模块将太阳能电池板输出的直流电进行调压以为直流驱动模块及直流侧电路供电，整流模块将主变压器输出的交流电进行整流以为整流驱动模块、逆变驱动模块及交流侧电路供电。可见，由于本申请中太阳能电池板输出的电源为低压电，因此太阳能电池板的输出端的电源通过调压可以直接为直流驱动模块及直流侧电路供电；由于主变压器输出的电源为高压电，因此将主变压器输出的交流电通过整流模块可以直接为整流驱动模块、逆变驱动模块及交流侧电路供电，不需要额外设置辅助电源以进行高压隔离，也即不需要额外设置开关电路、变压器、第二整流模块及第三整流模块，避免了由于使用开关电路的频繁开通或关断造成的噪声及功耗，且由于不需要额外使用变压器进行高压隔离，降低了成本。
本发明还提供了一种太阳能光伏逆变器，与上述描述的供电系统具有相同的有益效果。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对现有技术和 实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明提供的一种现有技术中的太阳能光伏逆变器的示意图；
图2为本发明提供的一种供电系统的结构框图；
图3为本发明提供的第一种供电系统的部分电路连接示意图；
图4为本发明提供的第一种供电系统的部分结构框图；
图5为本发明提供的第二种供电系统的部分结构框图；
图6为本发明提供的第二种供电系统的部分电路连接示意图；
图7为本发明提供的第三种供电系统的部分电路连接示意图。
具体实施方式
本发明的核心是提供一种供电系统及太阳能光伏逆变器，不需要额外设置辅助电源以进行高压隔离，也即不需要额外设置开关电路、变压器、第二整流模块及第三整流模块，避免了由于使用开关电路的频繁开通或关断造成的噪声及功耗，且由于不需要额外使用变压器进行高压隔离，降低了成本。
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参照图2，图2为本发明提供的一种供电系统的结构框图，该系统应用于太阳能光伏逆变器，太阳能光伏逆变器包括依次连接的直流转换开关模块、主变压器、整流模块及逆变模块；还包括直流驱动模块、整流驱动模块及逆变驱动模块；该系统包括：
输入端与太阳能电池板的输出端连接，输出端与直流驱动模块连接的DC/DC(DC-DC converter，直流/直流转换器)模块1，用于将太阳能电池 板输出的直流电进行调压以为直流驱动模块及直流侧电路供电；
输入端与主变压器的输出端连接，输出端与逆变驱动模块连接的整流模块2，用于将主变压器输出的交流电进行整流以为逆变驱动模块及交流侧电路供电。
太阳能光伏逆变器包括依次连接的直流转换开关模块、主变压器、整流模块及逆变模块，其中，直流转换开关模块为将太阳能电池板输出的直流电升压的高频开关；主变压器进行高压隔离和升压；整流模块将主变压器输出的交流电整流为直流电；逆变模块将整流模块输出的进行逆变以为负载供电；直流驱动模块用于驱动直流转换开关模块；整流驱动模块用于驱动整流模块；逆变驱动模块用于驱动逆变模块，且驱动模块、直流侧电路与交流侧电路均需要供电，现有技术中采用辅助电源对其进行供电，具体地，辅助电源包括开关电路、变压器、第二整流模块及第三整流模块，但是，在供电的过程中，开关电路中的开关需要频繁的进行开通或关断，功耗较大且容易产生噪声，此外，变压器的成本较大。
为解决上述技术问题，本申请的设计思路为：考虑到太阳能电池板输出的电源为低压电，一般为20-60V，且主变压器的输出端的电源为高压电，一般为300-400V，则可以将太阳能电池板输出的低压电进行调压处理以为直流驱动模块供电，将主变压器的输出端的高压电进行将处理以为逆变驱动模块供电，从而不需要对供电模块之间进行隔离，也即不需要额外设置包括开关电路、变压器、第二整流模块及第三整流模块的辅助电源。
基于此，本申请设置了DC/DC模块1，将太阳能电池板输出的低压的直流电进行调压处理，以为直流驱动模块供电及直流侧电路供电，其中直流侧电路为主变压器原边侧需要直流供电的电路；还设置了整流模块2，将主变压器输出端的交流电进行整流以为逆变驱动模块、整流驱动模块及交流侧电路供电，其中，交流侧电路为主变压器副边侧需要直流供电的电路。
需要说明的是，由于这里的主变压器输出的电源为高压交流电，则这里的整流模块2可以是既能实现整流功能也能实现降压功能的整流模块2。
此外，本申请中的整流模块中包含MOS(Metal-Oxide-Semiconductor Field-Effect Transistor,金属-氧化物半导体场效应晶体管)管时，需要整流 驱动模块对其进行驱动，此时整流模块输出的电源需要为整流驱动模块供电，在整流模块中不包含MOS管，包括二极管时，可以不需要整流驱动模块，请参照图3，图3为本发明提供的第一种部分供电系统的电路连接示意图，其中，这里的整流模块可以包括第一二极管、第二二极管、第三电容及第四电容，具体地，第一二极管的阳极分别与主变压器的输出正端及第二二极管的阴极连接，第一二极管的阴极与第三电容的第一端连接，第三电容的第二端分别与第四电容的第一端及主变压器的输出负端连接，第二二极管的阳极与第四电容的第二端连接，此时，整流模块不需要整流驱动模块，则整流模块输出的电源不需要为整流驱动模块供电。
综上，由于本申请中太阳能电池板输出的电源为低压电，因此太阳能电池板的输出端的电源通过调压可以直接为直流驱动模块及直流侧电路供电；由于主变压器输出的电源为高压电，因此将主变压器输出的交流电通过整流模块2可以直接为逆变驱动模块、整流驱动模块及交流侧电路供电，不需要额外设置辅助电源以进行高压隔离，也即不需要额外设置开关电路、变压器、第二整流模块及第三整流模块，避免了由于使用开关电路的频繁开通或关断造成的噪声及功耗，且由于不需要额外使用变压器进行高压隔离，降低了成本。
在上述实施例的基础上：
请参照图4，图4为本发明提供的第一种供电系统的部分结构框图。
作为一种优选的实施例，还包括：
设置于主变压器与整流模块2之间的分压模块3，用于将主变压器输出的交流电进行降压处理。
考虑到太阳能光伏逆变器中的主变压器的输出端的交流电压为高压电，整流模块2中可能会存在分压模块3，用于将主变压器输出的交流电进行降压处理，但是考虑到某些整流模块2中可能不存在分压模块3，则可能会造成整流模块2的损坏。
为解决上述技术问题，本申请在整流模块2和主变压器之间还设置了分压模块3，用于将主变压器输出的高压的交流电进行降压处理。
具体地，本申请中的分压模块3包括两个电容，两个电容的一端分别与主变压器的输入正端及输入负端连接，两个电容的另一端分别与整流模块2的输入端连接，用于和储能模块4共同分担主变压器的输出电压，限制储能模块4的充电电压，防止储能模块4不被损坏。
可见，本申请在主变压器和整流模块2之间设置了分压模块3，可以实现对主变压器的输出端的交流电进行降压的作用，保证了系统的安全性和可靠性，也防止储能模块4被损坏。
作为一种优选的实施例，还包括：
分别与整流模块2及逆变驱动模块连接的储能模块4，用于在整流模块2的输出端停止输出电源时为逆变驱动模块、整流驱动模块及交流侧电路供电；
整流模块2还用于将主变压器输出的交流电进行整流以为储能模块4充电。
考虑到整流模块2的输出端直接为逆变驱动模块、整流驱动模块及交流侧电路供电时，可能会存在整流模块2的输出端停止输出电源从而不能为逆变驱动模块、整流驱动模块及交流侧电路供电或者其他整流模块2的输出端供电不稳定的情况，如整流模块2被损坏等，此时将影响逆变模块的逆变效率。
为解决上述技术问题，本申请还设置了分别与整流模块2的输出端及逆变驱动模块连接的储能模块4，在整流模块2的输出端有电源输出从而可以直接为逆变驱动模块、整流驱动模块及交流侧电路供电时，整流模块2不仅为逆变驱动模块、整流驱动模块及交流侧电路供电，还为储能模块4充电；在整流模块2的输出端没有电源输出或输出电源不稳定从而不能直接为逆变驱动模块、整流驱动模块及交流侧电路供电时，储能模块4为逆变驱动模块、整流驱动模块及交流侧电路供电，保证了在整流模块2的输出端不能正常输出电源时，逆变驱动模块、整流驱动模块及交流侧电路仍能够正常工作，保证了逆变模块的效率。
需要说明的是，本申请中的储能模块4可以是电容，具体地，当储能模块4为电容时，储能模块4的两端并联在整流模块2的输出端与逆变驱动模块 之间。此外，本申请中的储能模块4也并不仅限于为电容，也可以是电池或者其他具有储能功能的储能模块4，本申请在此不做特别的限定。
作为一种优选的实施例，逆变模块为桥式逆变电路；
逆变驱动模块包括：
输入端与整流模块2的输出端连接，输入端与桥式逆变电路的上桥臂连接的上管驱动模块，用于驱动桥式逆变电路的上桥臂；
输入端与整流模块2的输出端连接，输入端与桥式逆变电路的下桥臂连接的下管驱动模块，用于驱动桥式逆变电路的下桥臂；
还包括：
设置于整流模块与上管驱动模块之间的自举电路5，用于将整流模块2输出端的电源进行升压处理以为上管驱动模块供电。
当逆变模块为桥式逆变电路时，考虑到桥式逆变电路的下桥臂的地端为稳定的地端，而桥式逆变电路的上桥臂由于下桥臂的导通或关断从而上桥臂的地端为不稳定的地端。
基于此，请参照图3，本申请中的逆变模块为桥式逆变电路时，本申请中的逆变驱动模块包括话上管驱动模块及下管驱动模块，分别驱动桥式逆变电路的上桥臂和下桥臂，此时，上管驱动模块与上桥臂共地，也即是上管驱动模块的地端也是不稳定的地端。为解决上述技术问题，本申请在上管驱动模块之前还设置了自举电路5，将整流模块2的输出端的电源进行升压处理以为上管驱动模块供电，整流模块2的输出端的电源直接为下管驱动模块供电，这样上管驱动模块的供电端为稳定的供电端。
综上，当逆变模块为桥式逆变电路时，使用自举电路5可以提高上管驱动模块的输入端的电压，从而保证上管驱动模块的供电的可靠性及逆变电路工作的可靠性。
作为一种优选的实施例，自举电路5包括二极管、第一电容及稳压管；
其中，二极管的阳极与整流模块2的输出端连接，二极管的阴极分别与第一电容的一端、稳压管的一端及上管驱动模块的输入端连接，第一电容的另一端分别与稳压管的另一端及上管驱动模块的地端及桥式逆变电路中上桥臂和下桥臂的连接处连接。
本实施例旨在提供一种自举电路5的具体实现方式，具体请参照图4，自举电路5中包括二极管、第一电容及稳压管，其中，自举电路5利用了电容不能突变的特性，整流模块2通过二极管给第一电容充电，当第一电容充电完成之后，上管驱动模块的输出正端则一直保持在第一电容充完电之后的电压，从而保证上管驱动模块能够准确的驱动桥式逆变电路的上桥臂，保证了逆变驱动模块的供电端的可靠性。
具体地，本申请中的桥式逆变电路可以是半桥逆变电路、全桥逆变电路或者其他的桥式逆变电路，只要能完成本申请中的整流模块输出的高压直流电进行逆变即可，本申请在此不做特别的限定。
此外，本申请中的桥式逆变电路的上桥臂及下桥臂可以是三极管或者MOS管，也可以是其他的可控开关，以上桥臂包括第一可控开关及第三二极管，下桥臂包括第二可控开关及第四二极管为例，第一可控开关的第一端与整流模块的输出正端及第三二极管的阴极连接，第一可控开关的第二端分别与第二可控开关的第一端、第三二极管的阳极及第四二极管的阴极连接，第一可控开关的控制端与上管驱动模块的输出端连接，第二可控开关的第二端分别与第四二极管的阳极及整流模块的输出负端(也即地端)连接，第二可控开关的控制端与下管驱动模块的输出端连接。其中，第一可控开关及第二可控开关可以但不限于均为PMOS(positive channel Metal Oxide Semiconductor，P沟道金属-氧化物半导体场效应晶体管)管。
作为一种优选的实施例，桥式逆变电路的上桥臂及下桥臂均为M个，M不小于2；
上管驱动模块为M个，且与M个上桥臂一一对应；
下管驱动模块为M个，且与M个下桥臂一一对应；
自举电路5为M个，且与M个上管驱动模块一一对应。
考虑到桥式逆变电路可能不是半桥逆变电路，也即是桥式逆变电路具有多个桥臂时(M个)，请参照图5，图5为本发明提供的第二种供电系统的部分结构框图，此时需要M个上管驱动模块分别驱动M个上桥臂，M个下管驱动模块分别驱动M个下桥臂，此时，M个桥式逆变电路的上桥臂的地端由于下桥臂的导通或关断从而M个上桥臂的地端均为不稳定的地端，且 上管驱动模块与上桥臂共地。
基于此，本申请还设置了M个自举电路5分别为M个上管驱动模块供电，从而保证了上管驱动模块的供电端的可靠性，从而保证了上管驱动模块驱动上桥臂的可靠性。
作为一种优选的实施例，储能模块4为第二电容，还包括第一电阻、第二电阻、第三电阻、第四电阻及稳压二极管；
其中，第一电阻的第一端与整流模块2的输出端连接，第一电阻的第二端与稳压二极管的第一端连接，稳压二极管的第二端分别与第二电容的一端、第三电阻的第一端及第四电阻的第一端连接，稳压二极管的第三端与第三电阻的第二端及第二电阻的第一端连接，第二电阻的第一端分别与第二电容的另一端及第四电阻的第二端连接。
当储能模块4为第二电容时，储能模块4并联在储能模块4的输出端，也即第一电容的一端与储能模块4的输出端连接，储能模块4的另一端接地，此时，还包括第一电阻、第二电阻、第三电阻、第四电阻及稳压二极管，其中，第一电阻为限流电阻，用于防止稳压二极管过流；第二电阻及第三电阻为基准分压电阻，用于将第二电容两端的电压进行分压；稳压二极管为限压器件，用于限制第三电阻的电压，保证电路的安全性及可靠性；第四电阻为等效负载，可以直接驱动系统中的其他芯片等，也可以接自举电路5从而为上管驱动模块供电。
综上，通过本申请中的第一电阻、第二电阻、第三电阻、第四电阻及稳压二极管，可以实现限流及限压等功能，保证了系统工作的稳定性、可靠性及安全性。
作为一种优选的实施例，直流转换开关模块及主变压器均为N个，N不小于2；还包括：
与N个主变压器一一对应的N个分压模块3，N个分压模块3的输入端分别与对应的主变压器的输出端连接，输出端并联后并与整流模块2的输入端连接；
整流模块2具体用于对N个分压模块3输出的交流电进行整流。
本实施例考虑到主变压器及主变压器前端的直流转换开关模块为多个 (N个)时，此时，将N个主变压器输出的交流电进行降压处理，然后通过的整流模块2进行统一整流，请参照图6，图6为本发明提供的第二种部分供电系统的电路连接示意图，其中，主变压器的个数为2个，整流模块2的个数为一个，使用一个整流模块2对各分压模块3输出的交流电进行整流，不需要设置多个整流模块2，节约了器件成本及接线成本。
当然，本申请中的整流模块2也可以是通过各自的整流模块2分别对对应的分压模块3输出的交流电进行整流，请参照图7，图7为本发明提供的第三种供电系统的部分电路连接示意图，其中，主变压器的个数为2个，整流模块2的个数为两个，使用两个整流模块2进行整流时，提高整流效率。
作为一种优选的实施例，还包括：
一一分别与N个分压模块3的输出端连接的N个限流模块6，用于限制储能模块4的充电电流。
考虑到储能模块4储存能量的容量有限，为了防止储能模块4不被损坏，本申请在N个分压模块3的输出端还分别设置了N个限流模块6，用于限制储能模块4的充电电流，从而避免储能模块4不被损坏。
本申请中的限流模块6可以包括多个二极管，请参照图6，当然，本申请中的限流模块6的具体实现方式不限于上述举例，还可以为其他的具有限流作用的其他器件，本申请在此不做特别的限定。
为解决上述技术问题，本申请还提供了一种太阳能光伏逆变器，包括上述的供电系统，还包括依次连接的直流转换开关模块、主变压器、逆变模块及直流驱动模块、整流驱动模块和逆变驱动模块；
其中，直流转换开关模块，用于对太阳能电池板的输出端的直流电进行升压并将其转换为高频交流电；
主变压器，用于进行高压隔离，并对高频交流电进行升压；
整流模块，用于将主变压器输出的交流电整流为直流电；
逆变模块，用于将整流模块输出的进行逆变以为负载供电；
直流驱动模块，用于驱动直流转换开关模块；
整流驱动模块，用于驱动整流模块；
逆变驱动模块，用于驱动逆变模块。
为解决上述技术问题，本申请还提供了一种太阳能光伏逆变器，与上述描述的供电系统具有相同的有益效果，本申请在此不再赘述。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。对于实施例公开的装置而言，由于其与实施例公开的方法相对应，所以描述的比较简单，相关之处参见方法部分说明即可。
还需要说明的是，在本说明书中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其他实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (10)

  1. 一种供电系统，应用于太阳能光伏逆变器，所述太阳能光伏逆变器包括依次连接的直流转换开关模块、主变压器、整流模块及逆变模块；还包括直流驱动模块、整流驱动模块及逆变驱动模块；其特征在于，包括：
    输入端与太阳能电池板的输出端连接，输出端与所述直流驱动模块连接的DC/DC模块，用于将所述太阳能电池板输出的直流电进行调压以为所述直流驱动模块及直流侧电路供电；
    输入端与所述主变压器的输出端连接，输出端与所述逆变驱动模块连接的整流模块，用于将所述主变压器输出的交流电进行整流以为所述整流驱动模块、所述逆变驱动模块及交流侧电路供电。
  2. 如权利要求1所述的供电系统，其特征在于，还包括：
    设置于所述主变压器与所述整流模块之间的分压模块，用于将所述主变压器输出的交流电进行降压处理。
  3. 如权利要求2所述的供电系统，其特征在于，还包括：
    分别与所述整流模块及所述逆变驱动模块连接的储能模块，用于在所述整流模块的输出端停止输出电源时为所述逆变驱动模块、所述整流驱动模块及所述交流侧电路供电；
    所述整流模块还用于将所述主变压器输出的交流电进行整流以为所述储能模块充电。
  4. 如权利要求1所述的供电系统，其特征在于，所述逆变模块为桥式逆变电路；
    所述逆变驱动模块包括：
    输入端与所述整流模块的输出端连接，输入端与所述桥式逆变电路的上桥臂连接的上管驱动模块，用于驱动所述桥式逆变电路的上桥臂；
    输入端与所述整流模块的输出端连接，输入端与所述桥式逆变电路的下桥臂连接的下管驱动模块，用于驱动所述桥式逆变电路的下桥臂；
    还包括：
    设置于所述整流模块与所述上管驱动模块之间的自举电路，用于将所述整流模块输出端的电源进行升压处理以为所述上管驱动模块供电。
  5. 如权利要求4所述的供电系统，其特征在于，所述自举电路包括二极管、第一电容及稳压管；
    其中，二极管的阳极与所述整流模块的输出端连接，二极管的阴极分别与所述第一电容的一端、所述稳压管的一端及所述上管驱动模块的输入端连接，所述第一电容的另一端分别与稳压管的另一端及上管驱动模块的地端及桥式逆变电路中上桥臂和下桥臂的连接处连接。
  6. 如权利要求4所述的供电系统，其特征在于，所述桥式逆变电路的上桥臂及下桥臂均为M个，M不小于2；
    所述上管驱动模块为M个，且与M个所述上桥臂一一对应；
    所述下管驱动模块为M个，且与M个所述下桥臂一一对应；
    所述自举电路为M个，且与M个所述上管驱动模块一一对应。
  7. 如权利要求3所述的供电系统，其特征在于，所述储能模块为第二电容，还包括第一电阻、第二电阻、第三电阻、第四电阻及稳压二极管；
    其中，所述第一电阻的第一端与所述整流模块的输出端连接，所述第一电阻的第二端与所述稳压二极管的第一端连接，所述稳压二极管的第二端分别与所述第二电容的一端、所述第三电阻的第一端及所述第四电阻的第一端连接，所述稳压二极管的第三端与所述第三电阻的第二端及所述第二电阻的第一端连接，所述第二电阻的第一端分别与所述第二电容的另一端及所述第四电阻的第二端连接。
  8. 如权利要求3-7任一项所述的供电系统，其特征在于，所述直流转换开关模块及所述主变压器均为N个，N不小于2；还包括：
    与N个所述主变压器一一对应的N个分压模块，N个所述分压模块的输入端分别与对应的主变压器的输出端连接，输出端并联后并与所述整流模块的输入端连接；
    所述整流模块具体用于对N个所述分压模块输出的交流电进行整流。
  9. 如权利要求8所述的供电系统，其特征在于，还包括：
    一一分别与N个所述分压模块的输出端连接的N个限流模块，用于限制所述储能模块的充电电流。
  10. 一种太阳能光伏逆变器，其特征在于，包括如权利要求1-9任一 项所述的供电系统，还包括依次连接的直流转换开关模块、主变压器、逆变模块及直流驱动模块、整流驱动模块和逆变驱动模块；
    其中，直流转换开关模块，用于将太阳能电池板的输出端的直流电进行升压并转换为高频交流电；
    所述主变压器，用于进行高压隔离，并对所述高频交流电进行升压；
    所述整流模块，用于将所述主变压器输出的交流电整流为直流电；
    所述逆变模块，用于将所述整流模块输出的进行逆变以为负载供电；
    所述直流驱动模块，用于驱动所述直流转换开关模块；
    所述整流驱动模块，用于驱动所述整流模块；
    所述逆变驱动模块，用于驱动所述逆变模块。
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