WO2020083470A1 - Système pour stabiliser un réseau de tension alternative - Google Patents

Système pour stabiliser un réseau de tension alternative Download PDF

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Publication number
WO2020083470A1
WO2020083470A1 PCT/EP2018/079003 EP2018079003W WO2020083470A1 WO 2020083470 A1 WO2020083470 A1 WO 2020083470A1 EP 2018079003 W EP2018079003 W EP 2018079003W WO 2020083470 A1 WO2020083470 A1 WO 2020083470A1
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WO
WIPO (PCT)
Prior art keywords
converter
phase
voltage
inverter module
voltage side
Prior art date
Application number
PCT/EP2018/079003
Other languages
German (de)
English (en)
Inventor
Martin Pieschel
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP18800495.6A priority Critical patent/EP3844853A1/fr
Priority to PCT/EP2018/079003 priority patent/WO2020083470A1/fr
Publication of WO2020083470A1 publication Critical patent/WO2020083470A1/fr

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Classifications

    • 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
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • 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
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • 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
    • H02M7/4807—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 having a high frequency intermediate AC stage
    • 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
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
    • 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
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
    • H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
    • 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
    • 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
    • H02M3/158—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 including plural semiconductor devices as final control devices for a single load
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
    • H02M5/297—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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 for conversion of frequency
    • 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

Definitions

  • the invention relates to a system for stabilizing an AC voltage network with a converter and at least one electrical energy store.
  • electrical energy taken from the AC voltage network can be stored, for example, and this can be made available to the AC voltage network at another time. In this way, the system is set up to exchange both reactive power and active power with the AC network.
  • the frequency in the AC network can be influenced, for example.
  • the AC voltage network is, for example, an energy supply network
  • the basic frequency of an AC voltage in the AC voltage network is usually 50 Hz or 60 Hz. This frequency should, if possible, remain constant over time. However, due to a change in power consumption by connected consumers and / or power output by connected producers, it is subject to fluctuations over time.
  • the stabilization of the frequency and thus the AC voltage network can be achieved in such cases by causing the compensation system to take up active power when the frequency in the AC network increases (overfrequency) and to deliver active power when the frequency is reduced (underfrequency).
  • Known systems for supporting an AC network consist, for example, of a low-voltage inverter which is connected to the AC network via a transformer for voltage adjustment.
  • the reactive power losses increase with an increasing nominal power through the transformer.
  • the transformer itself is getting bigger and bigger.
  • a cost-intensive high-voltage transformer must finally be used for outputs above 10 MW. Due to the use of a low-voltage energy storage device, the harmonic content also increases, which has to be reduced by complex countermeasures such as passive filters.
  • the electrical energy store is operated at a high DC voltage, complex insulation within the system is required. If battery storage is used, this is particularly problematic since battery storage always has residual voltage. This residual voltage makes maintenance of the system particularly difficult.
  • a type-appropriate system is known from WO 2016/150466 Al.
  • the converter of the known system comprises converter arms connected in a triangular circuit. In each converter arm, a series connection of switching modules is easily seen, each switching module having an electrical energy storage unit belonging to the switching module.
  • the object of the invention is to propose a position mentioned at the outset, which is as cost-effective and reliable as possible.
  • the converter is a matrix converter which can be connected on the primary side to an m-phase AC voltage network and whose secondary side has an n-phase connection
  • the system also has at least one NEN transformer, which can be connected to the secondary side of the matrix converter
  • at least one inverter module is provided, which has an AC voltage side and a DC voltage side, the AC voltage side being connectable to the secondary side of the matrix converter by means of the transformer, and the electrical cal energy storage device can be connected to the DC voltage side of the inverter module.
  • a line frequency for example three-phase AC voltage, for example in the medium voltage range
  • an AC voltage of higher frequency preferably a frequency between 100 Hz and 500 Hz
  • This alternating voltage of higher frequency can be converted to a lower voltage amplitude, preferably between 500 V and 1 kV, by means of the transformer, for example by means of a compact high-frequency transformer.
  • This alternating voltage of lower voltage amplitude can in turn be converted into a direct voltage by means of the at least one inverter module.
  • the system according to the invention makes it possible to overcome some of the disadvantages of the prior art. The conversion losses are reduced due to the possibility of using higher transmission frequencies.
  • the matrix converter When connected to a three-phase AC network, the matrix converter is expediently provided on the primary side with a three-phase connection in order to be able to be connected to a three-phase AC network.
  • the matrix converter is preferably a modular multi-stage converter.
  • the basic structure of a modular multi-stage converter comprises several converter arms, each converter arm having a series connection of two-pole switching modules. Switch module types that are frequently used are switch modules in half-bridge circuit or in full-bridge circuit.
  • Each of the switching modules of the modular multi-stage converter is means of a control device individually controllable.
  • a voltage drop across one of the converter arms is equal to the sum of voltages drop across the associated switching modules.
  • a particularly advantageous step-shaped converter voltage can be generated by means of the MMC.
  • n 2.
  • a first and a second secondary-side connection of the matrix converter are provided, the at least one transformer being a single-phase transformer, by means of whose primary winding the two secondary-side connections are connected to one another.
  • the converter therefore provides a single-phase AC voltage on the secondary side, which can be converted to a lower voltage level by means of the single-phase transformer.
  • the at least one inverter module has a single-phase connection on the AC voltage side.
  • DC voltage side of each of the inverter modules can be connected to the energy store assigned to this inverter module.
  • the secondary side of the converter is connected to a large number of transformers connected in parallel.
  • the current carrying capacity of the system can be increased by connecting the transformers in parallel.
  • a plurality of single-phase transformers and associated inverter modules and energy storage modules are provided, the primary winding lungs of the single-phase transformers are connected to one another in a series circuit.
  • the secondary winding of each of the single-phase transformers can be connected to the AC voltage side of the associated inverter module, the DC voltage side of each of the inverter modules being connectable to the energy store assigned to this inverter module.
  • the secondary side of the converter is hereby connected to a large number of transformers connected in series. The achievable voltage can advantageously be increased by connecting the transformers in series.
  • the DC voltage sides of the inverter modules can also be connected in parallel to increase the current.
  • n 3.
  • a first, a second and a third secondary-side connection of the matrix converter are thus provided, the at least one transformer being a three-phase transformer, and the at least one inverter module having a three-phase AC voltage side.
  • the secondary connection of the matrix converter is therefore three-phase. Accordingly, the AC voltage side of the inverter module is also configured in three phases.
  • transformers and inverter modules and energy storage modules assigned to them are seen before.
  • the primary windings of the transformers are connected to one another in parallel and the secondary windings of each of the transformers can be connected to the AC voltage side of the associated inverter module, the DC voltage side of each of the inverter modules being connectable to the energy store assigned to them.
  • the secondary side of the converter is hereby connected with a large number of parallel ones
  • the at least one inverter module suitably comprises an n-phase bridge circuit with power semiconductors.
  • the bridge circuit can thus be in particular two-phase or three-phase, the AC voltage side of the inverter module having a corresponding n-phase connection.
  • the bridge circuit can be, for example, a full bridge circuit known to the person skilled in the art.
  • the bridge circuit comprises n series circuits, each arranged in parallel, of two of the power semiconductor switches, the two outer potential points of the series circuits of the power semiconductor switches advantageously being connected to the DC voltage side of the inverter module.
  • the connections on the AC voltage side of the inverter module are suitably connected to potential points between the power semiconductor switches of each of the series connections.
  • the at least one inverter module preferably comprises a bridge capacitor in a parallel connection to the bridge circuit. So that the bridge capacitor is connected, for example, directly to the DC voltage side of the inverter module.
  • the at least one inverter module further comprises a DCDC converter, which is connected to a DC voltage side of the bridge circuit.
  • the DCDC converter preferably has two semiconductor switches and a converter capacitor in a half-bridge circuit, the DC voltage side of the inverter module being arranged in parallel with the converter capacitor.
  • a smoothing choke can also be arranged between the bridge circuit and the DCDC converter.
  • the transformer is a medium or high frequency transformer.
  • the working hours The frequency of the transformer can thus be, for example, over 100 Hz, in particular between 100 Hz and 500 Hz.
  • Figure 1 shows a first embodiment of an inventive system in a schematic representation
  • Figure 2 shows a second embodiment of an inventive system in a schematic representation
  • Figure 3 shows a third embodiment of an inventive system in a schematic representation
  • Figure 4 shows a first example of a matrix converter in a schematic representation
  • Figure 5 shows a fourth embodiment of an inventive system in a schematic representation
  • Figure 6 shows a fifth embodiment of an inventive system in a schematic representation
  • FIG. 7 shows a second example of a matrix converter in a schematic illustration
  • FIG. 8 shows an example of a switching module for one of the matrix converters of FIGS. 4 and 7 in a schematic illustration
  • Figures 9 and 10 each show an example of an inverter module in a schematic representation
  • FIG. 11 shows an example of a bridge circuit for one of the inverter modules of FIGS. 9 and 10;
  • Figures 12 and 13 show further examples of an inverter module in a schematic representation;
  • FIG. 14 shows an example of a bridge circuit for one of the inverter modules of FIGS. 12 and 13 in a schematic representation
  • FIG. 15 shows an example of a DCDC converter for one of the inverter modules of FIGS. 9, 10, 12 and 13.
  • FIG. 1 a system 1 for stabilizing an AC network 2 is shown.
  • the facility includes one
  • Power converter 3 which is a matrix converter.
  • the structure of the converter 3 is discussed in more detail in the following FIG. 4.
  • the converter 3 has a three-phase AC voltage connection 4 on the primary side and can therefore be connected to the three-phase AC voltage network 2.
  • the converter 3 is connected via a secondary side with a secondary-side, single-phase connection 5 to a single-phase transformer, in the exemplary embodiment shown a single-phase medium-frequency transformer 6, or its primary winding.
  • the medium-frequency transformer 6 is connected to an AC voltage side 8 of an inverter module 7 via a secondary winding.
  • the structure of the inverter module 7 is discussed in more detail in the following FIGS. 9-11.
  • the system 1 further comprises an electrical energy store 10 which is connected to a DC voltage side 9 of the inverter module 7.
  • the electrical energy store 10 is a battery store.
  • the system further comprises a control unit 11 for controlling the converter 3 by means of a control of its controllable semiconductor switch.
  • the control unit 11 can also perform regulation of the power exchange between the system 1 and the AC network 2. Currents and voltages both on the primary side and on the secondary side of the converter 3 are detected by means of suitable measuring devices 12-14 and assigned to the control unit 11. leads, which generates control signals for the converter 3 and the other elements of the system 1 as a function of operating point specifications.
  • FIG. 2 a system 15 for stabilizing an AC voltage network 2 is shown. Identical and similar elements and system parts are provided with the same reference symbols in FIGS. 1 and 2. The structure of system 15 largely corresponds to that of system 1 in FIG. 1.
  • system 15 comprises a plurality of single-phase transformers 6a, 6b, which are designed as
  • Medium-frequency transformers are designed. In the example shown there are two, but it is conceivable and possible without any further, the number of which can in principle be increased arbitrarily with a corresponding structure.
  • the medium frequency transformers 6a, b are connected to one another on the primary side in a parallel circuit.
  • Each of the medium-frequency transformers 6a, b is connected on the secondary side to its own inverter module 7a or 7b, the DC voltage side 9 of which is connected to an associated electrical energy storage device 10a or 10b.
  • the system 15 like the system 1, has a control unit of the same design with corresponding measuring devices, which is, however, not shown explicitly in FIG. 2.
  • system 16 comprises a plurality of single-phase transformers 6c, 6d, which are used as
  • Medium-frequency transformers are designed. In the example shown there are two, but it is conceivable and oh- ne further possible, the number of which can be increased in principle with the appropriate structure.
  • the medium-frequency transformers 6c, d are connected to one another on the primary side in a series connection. Each of the medium-frequency transformers 6c, d is connected on the secondary side to its own inverter module 7c or 7d, the DC voltage side 9 of which is connected to an associated electrical energy store 10c or 10d.
  • the system 16 like the systems 1 and 15 of FIGS. 1 and 2, also has a control unit with corresponding measuring devices, which, however, is not shown explicitly in FIG. 3.
  • FIG. 4 shows a converter 3 for one of the systems 1,
  • the converter 3 is a matrix converter with a primary side 21 and a secondary side 22.
  • the primary side 21 has a three-phase connection 23 with three connection branches A, B, C, by means of which the converter for example, can be connected to a three-phase alternating voltage network.
  • the secondary side 22 has a single-phase connection 24 with two connection branches U, V, by means of which the converter 3 can be connected, for example, to a single-phase transformer.
  • the converter 3 comprises six converter arms 25 to 30, each primary-side connection branch AC being connected in each case via one of the converter arms 25-30 to a connection branch U, V on the secondary side. In the example shown in Figure 4, the converter arms 25-30 are constructed in the same way, but this is generally not necessary.
  • Each converter arm 25-30 has a smoothing inductance 31 and a series connection of two-pole switching modules 32.
  • the number of switching modules 32 in a converter arm can be up to several hundred and more.
  • the structure of the switching modules 32 is discussed in more detail below in FIG. 8.
  • the converter can also comprise a separate control device, not shown in the figure.
  • a system 33 for stabilizing the AC voltage network 2 is shown.
  • the same and similar elements and system components are provided with the same reference numerals in FIGS. 1 and 5.
  • the structure of system 33 largely corresponds to that of system 1 in FIG. 1. For reasons of clarity, only the differences between systems 1 and 33 will be discussed below. The same also applies to the following FIG. 6.
  • the system 33 comprises a converter 34.
  • the converter 34 has a three-phase AC voltage connection 4 on the primary side and can therefore be connected to the three-phase AC voltage network 2.
  • the converter 34 is connected to a three-phase transformer 36, in the exemplary embodiment shown a single-phase medium-frequency transformer, via a secondary side with a customer-side, likewise three-phase connection 35. Via its secondary windings, the medium-frequency transformer 36 is connected to an AC voltage side 38 of an inverter module 37.
  • the structure of the inverter module 37 is discussed in more detail in the following FIGS. 12-14.
  • FIG. 6 a system 39 for stabilizing the AC voltage network 2 is shown.
  • the system 34 comprises a plurality of three-phase transformers 36a, 36b, which are designed as medium-frequency transformers.
  • the medium-frequency transformers 36a, 36b are connected to one another on the primary side in a parallel connection.
  • Each of the medium-frequency transformers 36a, 36b is connected on the secondary side by means of corresponding connections 38 to an internal inverter module 37a or 37b, the DC voltage side 9 of which is associated with one
  • the systems 33 and 39 like the system 1 in FIG. 1, also have a control unit with corresponding measuring devices, which, however, are not explicitly illustrated in FIGS. 5 and 6 above.
  • FIG 7 shows a converter 34 for one of the systems 33, 39 of Figures 5 and 6.
  • the same and similar elements and system parts are provided with the same reference numerals in Figures 4 and 7. For reasons of clarity, only the differences between the converters 3 and 34 will be discussed in the fol lowing.
  • the converter 34 is a matrix converter with a primary side 21 and a secondary side 41.
  • the secondary side 41 has a three-phase connection 40 with three connection branches U, V and W, by means of which the converter 34, for example can be connected to a three-phase transformer.
  • the converter 34 comprises nine converter arms 42 to 50, each primary-side connection branch A-C being connected via one of the converter arms 42-50 to a secondary-side connection branch U, V, W.
  • the converter arms 42-50 are constructed in the same way, but this is generally not necessary.
  • FIG. 8 shows a switching module 32 for one of the converters 3 and 34 of Figures 4 and 7.
  • the switching module 32 is designed as a so-called full-bridge module and accordingly comprises four semiconductor switches Sl-4 that can be switched off, each of which has a free-wheeling diode D connected antiparallel.
  • a capacitor C is arranged, to which a capacitor voltage Uc is applied, and a voltage measuring device 51 for detecting the capacitor voltage Uc.
  • a voltage can be generated by suitable control of the semiconductor switch Sl-4, which corresponds to the capacitor voltage Uc, a negative capacitor voltage -Uc or a zero voltage.
  • the inverter module 51 comprises a bridge circuit 54 and a DCDC converter 55.
  • the bridge circuit 54 has an AC voltage side 52 with a single-phase connection with two connection branches Y1, Y2 and a DC voltage side 53 with two connections ZI, Z2.
  • the structure of the bridge circuit is described in more detail in the following FIG. 11.
  • the DCDC converter 55 can be connected to an electrical energy store by means of connections DC +, DC-.
  • the structure of the DCDC converter 55 is discussed in more detail in the following FIG. 15.
  • FIG. 10 shows a further example of an inverter module 56 for one of the systems in FIGS. 1 to 3.
  • the inverter module 56 comprises a bridge circuit 54.
  • the inverter module 56 does not have a DCDC converter.
  • the bridge circuit 54 has an AC voltage side 52 with a single-phase connection with two connection branches Y1, Y2 and a DC voltage side 53 with two connections ZI,
  • FIG. 11 shows a bridge circuit 54 for one of the inverter modules 51 and 56 of FIGS. 9 and 10.
  • the bridge circuit 54 comprises four semiconductor switches S1-S4 that can be switched off and also antiparallel diodes D.
  • a bridge capacitor CB is arranged in a parallel connection to the DC-side connections ZI and Z2 of the bridge circuit 54, which form a DC voltage side 53 of the bridge circuit.
  • FIG. 12 shows an example of an inverter module 57 for one of the systems in FIGS. 5 and 6.
  • the inverter module 57 comprises a bridge circuit 58 and a DCDC converter 55.
  • the bridge circuit 58 has one AC voltage side 59 with a three-phase connection with three connection branches Yl-3 and a DC voltage side 53 with two connections ZI, Z2.
  • the structure of the bridge circuit is described in more detail in the following FIG. 14.
  • the DCDC converter 55 can be connected to an electrical energy store by means of connections DC +, DC-.
  • the structure of the DCDC converter 55 is discussed in more detail in the following FIG. 15.
  • FIG. 13 shows a further example of an inverter module 60 for one of the systems in FIGS. 5 or 6.
  • the inverter module 60 comprises a bridge circuit 59.
  • the inverter module 60 does not have a DCDC converter.
  • the bridge circuit 58 has an AC voltage side 52 with a three-phase connection with three connection branches Yl-3 and a DC voltage side 53 with two connections ZI, Z2. The structure of the bridge circuit is discussed in more detail in the following FIG. 14.
  • FIG. 14 shows a bridge circuit 58 for one of the inverter modules 57 or 60 of FIGS. 12 and 13.
  • the bridge circuit 58 comprises six semiconductor switches S1-S6 which can be switched off and diodes D which are antiparallel to them.
  • a bridge capacitor CB is arranged in a parallel circuit to the DC side connections ZI and Z2 of the bridge circuit 58.
  • FIG. 15 shows a DCDC converter 61 for one of the inverter modules in FIGS. 9 and 12.
  • the DCDC converter 61 which is also referred to as a step-up / step-down converter, comprises a first pair of connections 62, 63 for connecting to a bridge circuit and a second pair of connections DC +, DC- for connecting to an electrical energy store 64.
  • the DCDC- Converter 61 two semiconductor switches Hl, H2, which are arranged with a converter capacitor Cw in a half-bridge circuit.
  • the semiconductor switches Hl, 2 each have a diode D1 or D2 connected in anti-parallel.
  • An additional inductance 65 can be arranged on one of the connections 62, 63 of the first connection pair.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne un système (1) de stabilisation d'un réseau à tension alternative (2) comprenant un convertisseur statique (3) et au moins un accumulateur d'énergie électrique (10). L'invention est caractérisée en ce que le convertisseur statique est un convertisseur statique matriciel dont le côté primaire peut être raccordé à un réseau de tension alternative à m phases et dont le côté secondaire (5) possède une connexion à n phases. Le système comprend en outre au moins un transformateur (6) qui peut être relié au côté secondaire du convertisseur statique matriciel. Au moins un module onduleur (7) est présent, lequel possède un côté tension alternative (8) et un côté tension continue (9), le côté tension alternative pouvant être relié au côté secondaire du convertisseur statique matriciel au moyen du transformateur et l'accumulateur d'énergie électrique (10) pouvant être relié à un côté tension continue du module onduleur.
PCT/EP2018/079003 2018-10-23 2018-10-23 Système pour stabiliser un réseau de tension alternative WO2020083470A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18800495.6A EP3844853A1 (fr) 2018-10-23 2018-10-23 Système pour stabiliser un réseau de tension alternative
PCT/EP2018/079003 WO2020083470A1 (fr) 2018-10-23 2018-10-23 Système pour stabiliser un réseau de tension alternative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/079003 WO2020083470A1 (fr) 2018-10-23 2018-10-23 Système pour stabiliser un réseau de tension alternative

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WO2020083470A1 true WO2020083470A1 (fr) 2020-04-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113098295A (zh) * 2021-04-07 2021-07-09 全球能源互联网研究院有限公司 一种交交变换器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080179951A1 (en) * 2005-09-06 2008-07-31 Siemens Aktiengesellschaft Wide-voltage-range converter
WO2016150466A1 (fr) 2015-03-20 2016-09-29 Siemens Aktiengesellschaft Ensemble d'accumulation d'énergie
EP3361598A2 (fr) 2017-02-13 2018-08-15 Siemens Aktiengesellschaft Dispositif d'équilibrage pour un batterie dans un système de convertisseur
EP3361617A1 (fr) * 2017-02-14 2018-08-15 Siemens Aktiengesellschaft Circuit redresseur pour une installation d'électrolyse

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080179951A1 (en) * 2005-09-06 2008-07-31 Siemens Aktiengesellschaft Wide-voltage-range converter
WO2016150466A1 (fr) 2015-03-20 2016-09-29 Siemens Aktiengesellschaft Ensemble d'accumulation d'énergie
EP3361598A2 (fr) 2017-02-13 2018-08-15 Siemens Aktiengesellschaft Dispositif d'équilibrage pour un batterie dans un système de convertisseur
EP3361617A1 (fr) * 2017-02-14 2018-08-15 Siemens Aktiengesellschaft Circuit redresseur pour une installation d'électrolyse

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113098295A (zh) * 2021-04-07 2021-07-09 全球能源互联网研究院有限公司 一种交交变换器

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