Classifications

• • 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
• • 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
  • H02M7/505—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 thyratron or thyristor type requiring extinguishing means
  • H02M7/515—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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only
  • H02M7/521—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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only 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
  • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
  • H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
• • 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
• • 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

• DC-AC inverter arrangement in particular solar cell inverter
• the invention relates to an inverter arrangement according to the preamble of claim 1 or of claim 10.
• AC-DC DC-AC converter
• Power supply network found wide application. Even when using other renewable energies, such as wind turbines, Stirling engines, heat pumps or modern energy storage systems based on Primärt. Secondary cells are used converters of this or similar type.
• a generic DC-AC inverter arrangement is known from DE 102004 030912 B3.
• the invention describes a possibility in which the half-waves of the AC voltage on the output side are not generated by the bridge, but by an upstream DC-DC converter.
• the bridge only works as a turner.
• this makes it possible to use in the bridge circuit for switch Sl in the bridge transistors with low R ds , on.
• This can significantly contribute to reducing the power loss, since these components must be designed only at the peak value of the output voltage and thus can have very low Rd S , on, even with a large input voltage range of the inverter.
• these transistors can also be switched on in reverse conduction via a diode, so that even in this operating state only a minimal voltage drop is generated on the component.
• the DC-DC converter has a buck converter.
• the DC-DC converter has a combination of a buck converter and a boost converter or a high-low converter with common inductance.
• the DC-DC converter is designed as a four-quadrant controller and thus capable of being fed back, and the inverter arrangement is thereby designed to be capable of reactive power. Due to the regenerative capacity, this version can provide the power grid with reactive power, which may be required by E-Werke in the future.
• the regenerator is also capable of regenerating direct current from alternating current, whereby this topology is suitable, for example, for chargers.
• switching devices of the bridge circuit have MOSFETs or low-value IGBTs of R ds , on.
• the semiconductor bridge circuit is implemented as an H-bridge for single-phase output.
• 1 is a circuit diagram of a first embodiment of the invention
• 2 is a circuit diagram of a second embodiment of the invention
• FIG. 3 is a circuit diagram of a third embodiment of the invention.
• FIG. 4 shows a circuit diagram of a fourth embodiment of the invention
• FIG. 5 shows a graph of the time profile of the output voltage of the overall arrangement and the voltage generated by the DC chopper in the embodiment according to FIG. 4.
• TSS Step-down converter, power electronic basic circuit for voltage
• HSS boost converter, power electronic base circuit for voltage conversion, where U 2 > Ui.
• HTSS high stepper, combination of TSS and HSS with common
• Ui (referred to in the figures as u_l) is the input voltage of the circuit
• U 2 (in the figures u_2) is the output voltage of the circuit.
• UTSS (denoted U_TSS in Figs. 1 and 2) is the voltage at the output of the buck converter
• U H TSS (denoted U_HTSS in Figs. 3 and 4) is the voltage at the output of the buck converter.
• FIGS. 1 to 4 are essentially self-explanatory, so that subsequently no closed verbal description of the circuit structure will be given, but primarily important functional aspects of the respective arrangement will be described.
• the bridge circuit comprises four switching devices Sl to S4, specifically as MOSFETs or IGBTs with low R ds , on can be formed.
• the DC-DC converter component 11 in all embodiments has an input-side capacitor C_ZK and an output capacitor, which is designated C_TSS in FIG. 1 and FIG. 2, and a circuit inductance (which is denoted L_TSS in FIGS. 1 and 2).
• the input voltage Ui is buffered in the buffer capacitor C_K. Subsequently, this voltage is reduced via the buck converter 11 down to a controllable voltage U T ss with Ui> U T ss> 0.
• the time profile of the voltage U T ss is specified as the magnitude function of the output voltage u 2 (t):
• the H-bridge which is connected to the output of the step-down converter, works as a polarity reverser, so that
• the circuit of FIG. 1 can be extended by executing the step-down converter in a feedback-capable manner. Then with the described topology also power from the connected network (voltage U 2 ) can be taken and stored in the intermediate circuit.
• a modified inverter arrangement 20 with a buck converter 21 and a B4 bridge 22 is shown in FIG. It is by the provision of a second switching device S2 T ss of Tiefsetzstellers blind power and also has a higher control reserve, which is necessary in order to discharge the filter capacitor C 2 of the buck converter for small network currents can.
• an extension of the topology is possible in which the usable input voltage range is increased.
• FIG. 3 shows an inverter arrangement 30 with a stepping converter 31 and a B4 bridge 32, wherein the buck converter components S1_TSS and D2_TSS, with the common use of an inductance L_HTSS, boost converter components S2_HSS and D1_HSS are connected on the output side.
• the output capacitor is here designated C_HTSS.
• the step-up converter makes it possible to set an output voltage whose instantaneous value can also be greater than the voltage at the DC link.
• FIG. 4 shows, as a reactive power variant of the circuit arrangement of FIG. 3, an inverter arrangement 40 with a regenerative high-low setting divider 41 and a B4 bridge 42. Both in the step-down converter and in the step-up converter section, in comparison to the embodiment according to FIG Diode replaced by a switching device S2_TSS or S1_HSS.
• FIG. 5 shows the graph of the voltage characteristics of the output voltage u_HTSS (t) at the step-up converter and the output voltage u_2 (t) of the inverter arrangement that the DC component of the respective circuits performs the sine wave shaping of the input-side DC voltage, while the downstream H or B4 bridge only acts as a pole turner.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Inverter Devices (AREA)
• Dc-Dc Converters (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43242589

Family Applications (1)

Country Status (8)

Families Citing this family (20)

Family Cites Families (16)

• 2009
  • 2009-09-11 DE DE102009029387A patent/DE102009029387A1/de not_active Withdrawn
• 2010
  • 2010-07-20 EP EP10740574A patent/EP2476194A1/de not_active Withdrawn
  • 2010-07-20 IN IN1551DEN2012 patent/IN2012DN01551A/en unknown
  • 2010-07-20 AU AU2010294425A patent/AU2010294425A1/en not_active Abandoned
  • 2010-07-20 WO PCT/EP2010/060501 patent/WO2011029650A1/de active Application Filing
  • 2010-07-20 CN CN2010800401454A patent/CN102640409A/zh active Pending
  • 2010-07-20 KR KR20127006185A patent/KR20120041791A/ko not_active Application Discontinuation
  • 2010-07-20 US US13/395,438 patent/US20120228938A1/en not_active Abandoned

Non-Patent Citations (2)

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