WO2017009010A1 - Sous-module pour un convertisseur modulaire à plusieurs étages - Google Patents

Sous-module pour un convertisseur modulaire à plusieurs étages Download PDF

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Publication number
WO2017009010A1
WO2017009010A1 PCT/EP2016/064287 EP2016064287W WO2017009010A1 WO 2017009010 A1 WO2017009010 A1 WO 2017009010A1 EP 2016064287 W EP2016064287 W EP 2016064287W WO 2017009010 A1 WO2017009010 A1 WO 2017009010A1
Authority
WO
WIPO (PCT)
Prior art keywords
energy storage
module
submodule
energy
control unit
Prior art date
Application number
PCT/EP2016/064287
Other languages
German (de)
English (en)
Inventor
Rodrigo Alonso Alvarez Valenzuela
Holger Siegmund BREHM
Mario Fehmel
Martin Pieschel
Ervin SPAHIC
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 EP16733366.5A priority Critical patent/EP3295551A1/fr
Publication of WO2017009010A1 publication Critical patent/WO2017009010A1/fr

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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
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • 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
    • 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
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]

Definitions

  • the invention relates to a submodule of a modular Mehrstu ⁇ fenumrichters with a power semiconductor circuit having at least two switched on and off power semiconductor ⁇ switch, and with an energy storage.
  • Such a modular multi-stage converter has a plurality of two-pole submodules each having an energy store.
  • the power semiconductor circuit of these submodules can be controlled so that at two submodule connections (ie at two poles) of these two-pole submodules either a voltage provided by the energy store (possibly in both possible polarities) or a zero voltage (a voltage with the value zero , that is no voltage) is output.
  • the output voltage of the modular multistage converter is composed of the voltage amounts of the individual submodules. Since such modular multi-stage converters generally have a large number of submodules, the desired output voltages can be generated very precisely, that is to say by means of small voltage stages.
  • Modular Mehrmenumrichter are often used in high-voltage ⁇ area, for example in high voltage direct current transmission. Depending on the control and arrangement of the individual submodules, this can result in very high voltages with respect to ground potential or with respect to other submodules in the case of individual submodules. This results in high demands on the electrical insulation of the individual submodules, which can lead to high costs in the construction of modular Mehrmenumrichtern.
  • the invention has for its object to provide a submodule of a modular Mehrmenumrichters and a method for Be ⁇ driving a modular Mehrmenumrichters, wel ⁇ che can be realized inexpensively.
  • a sub-module of a modular Mehrmenumrichters with a power semiconductor circuit the input at least two and having disengageable (mono- and disconnected) Leis ⁇ semiconductor switch, and with an energy store, wherein the energy storage comprises a plurality of energy storage modules that (electrically and mechanically ) are constructed identically (eg identically).
  • ⁇ Sonder is advantageous that the same type of construction Ener ⁇ gie Eckbau jury philosophy can be prefabricated under the defined conditions of a factory-like production and tested. This makes the construction of a modular multi-stage converter at the customer much easier.
  • each energy storage module a plurality of energy storage units (In ⁇ game low voltage energy storage) comprises and a control unit, in which between the control unit and the Ener ⁇ giessenrittritten module-internal (energy Eatbau- group-internal) power supply interface for an auxiliary power supply of the Energy storage units and module-internal communication interfaces for communication with the energy storage units are arranged.
  • each energy storage module a plurality of energy storage units (In ⁇ game low voltage energy storage) comprises and a control unit, in which between the control unit and the Ener ⁇ gie Grandetechniken module-internal (energy Eatbau- group-internal) power supply interface for an auxiliary power supply of the Energy storage units and module-internal communication interfaces for communication with the energy storage units are arranged.
  • control unit performs both the auxiliary power supply and the communication with the energy storage units (excluding the control unit).
  • the control unit is arranged in spatial proximity to the energy storage units, since the control unit and the energy storage units are part of the energy storage module. This allows a simple and cost-effective communication between the control unit and the energy storage units and a simple and cost-effective supply of Energyspei ⁇ cherajien with (auxiliary) energy.
  • the submodule can be designed so that the Steuerein ⁇ units of the power storage modules are connected in a series circuit by means of assemblies of external-(energy storage assembly external) communication interfaces (communication flow relation).
  • each control unit communicates le ⁇ diglich with the arranged before it in the series circuit control unit or with the arranged behind it in the series circuit controlling unit.
  • This has the advantage that the module-external communication interfaces of an energy storage module only need to be connected to the module-external communication interfaces of the two adjacent energy storage modules. As a result, the maximum occurring potential differences between these energy storage modules are known and can be taken into account in the design of the communication interfaces.
  • the submodule can be designed such that, within an energy storage module, the control unit to the energy storage units ⁇ via the board-internal communication interface is galvanically coupled.
  • Such galvanic coupling of the control unit with the Energyspei ⁇ cherajien the energy storage module is inexpensive possible.
  • Such a galvanic coupling is sufficient in particular because only relatively small potential differences exist between the energy storage units of the energy storage module (compared to the potential differences that can occur between different energy storage modules).
  • the submodule can also be designed so that the assemblies are internal communication interfaces as electrically conductive, in particular as metallic lines out ⁇ leads. Such lines are cost ⁇ realizable ⁇ bar.
  • the submodule may also be configured so that the control ⁇ units of two power storage modules are electrically isolated (using the Module external communication interfaces) of each other. Such galvanic Entkopp ⁇ development of the control units of various energy storage assemblies allows safe operation even when large potential differences occur between the respective energy storage modules.
  • the submodule can also be designed such that the component groups external communication interfaces are designed as optical waveguides.
  • energy storage modules can be easily interconnected, between which large potential differences or potential differences occur.
  • optical fibers are relatively expensive. It is therefore advantageous if only the module-external communication interfaces are designed as optical waveguides, whereas the module-internal communication interface is executed as an optical waveguide.
  • the submodule can be configured such that each energy storage module in addition to having the assembly external communication interface further redundant modules ⁇ external communication interface. In other words, each energy storage module has two redundant module-external communication interfaces. This advantageously ensures that communication with the energy storage module can be maintained even if one communication interface fails via the second communication interface.
  • the submodule can be designed such that each energy storage ⁇ subassembly has an auxiliary power supply unit for the auxiliary power supply and additionally a redundant auxiliary power supply unit for the auxiliary power supply ⁇ .
  • Each energy storage module thus has two redundant auxiliary power supply units for the auxiliary power supply. In this way, it is advantageously ensured that the auxiliary power supply for the energy storage units of the energy storage module can be maintained even if an auxiliary power supply unit fails by means of the second auxiliary power supply unit.
  • the submodule can be designed such that the submodule has a DC-DC converter which connects the power semiconductor circuit (electrically) to the energy store.
  • a DC-DC converter enables an improved solution ANPAS ⁇ the output voltage of the energy storage to the loading ⁇ operating voltage of the power semiconductor.
  • a DC-DC converter enables an improved adaptation of the output voltage of the energy store to the operating voltage of the power semiconductor switches of the power semiconductor circuit.
  • the submodule can be designed such that it has a DC voltage intermediate circuit, which provides electrical energy for the auxiliary power supply. In this case, the DC link circuit, which is often present anyway in the submodule, is additionally used for the auxiliary power supply of the energy storage units.
  • Sub-module may be configured such that the DC clamping voltage between ⁇ circle the power semiconductor circuit
  • the submodule can be designed so that the Energyspei ⁇ cherbauè having two, four or eight energy storage units.
  • a modular multi-stage converter with a plurality of submodules, which are designed according to one of the variants described above. Further disclosed is a method of operating a modular Mehrmenumrichters having a plurality of Submo ⁇ dulen each having a power semiconductor circuit and in each case an energy store, wherein the Energyspei ⁇ cher having a plurality of energy storage modules, and wherein each energy storage module several Energyspei ⁇ cherajien and a control unit wherein in the method
  • This method can be carried out so that the energy storage units are supplied with electrical energy (auxiliary energy) from the control unit via internal power supply interfaces.
  • the method can also be configured such that the submodules are designed according to one of the variants set out above.
  • the method also has the advantages indicated above in connection with the submodule.
  • Figure 1 shows an embodiment of an arrangement with a modular multi-stage converter
  • Figure 2 shows an embodiment of a
  • Figure 3 shows an embodiment of a
  • Multi - stage converter with phase modules arranged in a star circuit , in
  • Figure 5 shows an embodiment of a single-phase
  • Figure 6 shows an embodiment of a structure
  • FIG. 7 shows an exemplary embodiment of a submodule of a modular multistage converter
  • FIG. 8 shows an exemplary embodiment of a power semiconductor circuit
  • FIG Figure 9 shows another embodiment of a
  • Power semiconductor circuit in Figure 10 an embodiment of a DC-DC converter, in
  • Figure 11 shows another embodiment of a
  • Figure 12 shows an embodiment of a
  • Figure 13 is a perspective view of a
  • Embodiment of a submodule of a modular multi-stage converter in
  • Figure 14 shows an embodiment of a
  • FIG. 15 shows an exemplary embodiment of a control unit of an energy storage unit
  • FIG. 16 shows an exemplary embodiment of a
  • FIG. 1 shows an arrangement 1 with a modular multi-stage converter 3 (modular multilevel converter 3).
  • the modular Mehrmenumrichter 3 is electrically connected via a connection ⁇ rail 5 three-phase with a power supply network 7.
  • the energy supply network 7 is a three-phase AC energy supply network 7.
  • a current sensor 10 the current flowing through the converter 3 is measured.
  • Current measurements 13 are transmitted to a drive unit 15 for the modular multistage converter.
  • a Voltage sensor 18 (which is here out as a transducer 18 performs ⁇ ) measured at the terminal rail 5 voltage applied. This voltage essentially corresponds to the voltage applied to the modular multistage converter.
  • Measured voltage values to the control unit 21 are 15 übertra ⁇ gene.
  • the control unit 15 compares the measured current values 13 and the measured voltage values with predetermined desired values 25, 21 Then, the control unit computes control signals 28 which are transmitted to the modular Mehrisnumrichter. 3 By means of these drive signals 28, the multistage converter 3 is driven in such a way that the desired current and voltage values are set on the connecting bar 5. In other words, the drive unit 15 controls the multi-stage converter 3.
  • the modular multi-stage converter 3 can be used, for example, for Blindleis ⁇ tion compensation.
  • FIG. 2 shows an embodiment of a Mehrhownum ⁇ judge 3 is shown, which has three phase modules 210 up. These three phase modules 210 are connected in delta configuration and connected to three phases LI, L2 and L3 of the Energyver ⁇ supply network. 7
  • the structure of the phase modules 210 is shown in FIG. 3 shows an embodiment of a Mehrhownum ⁇ converter 3 is shown that the six phase module 210 includes ⁇ . These six phase modules 210 are in a bridge circuit ⁇ (here, in a B6 bridge circuit) are arranged. In this case, in each case one connection of a first phase module and one connection of a second phase module are electrically connected to one another and form an AC voltage connection 302, 304 or 306.
  • the other terminal of the first phase module is connected to a positive DC voltage terminal 310; the other terminal of the second phase module is connected to a negative DC voltage terminal 312.
  • the three alternating voltage clamping ⁇ terminals 302, 304 and 306 are connected to three phases LI, L2 and L3 of the AC power supply network 7 ver ⁇ connected.
  • FIG 4 shows an embodiment of a modular multi-stage inverter 3, in which three phase modules 210 are connected in star ⁇ circuit.
  • three phase modules 210 are connected in star ⁇ circuit.
  • one connection of the three phase modules 210 are electrically connected to one another and form a neutral point 410.
  • the star point 410 is connected to a return conductor N of the energy supply network 7.
  • the other three terminals of the phase modules 210 are each connected to a phase (LI, L2 or L3) of the Energyversor ⁇ supply network 7 is connected.
  • phase module 210 can be single-phase connected to an energy supply network ⁇ .
  • this phase module 210 can be connected between a phase L and the return conductor N of the power supply network, as shown in FIG .
  • such phases may be senmodul 210 but also connected between a positive terminal and a negative terminal of a DC voltage network or a direct ⁇ voltage circuit.
  • the latter is ⁇ example, in the high-voltage direct current transmission beneficial because there is a common DC circuit already exists.
  • FIG. 6 shows an embodiment of the phase module 210 in greater detail.
  • the phase module 210 includes a first circuit to ⁇ 604 and a second terminal 606th
  • the first terminal 604 is electrically connected to a first sub-module 610 via a current sensor 608.
  • the first submodule 610 is electrically connected in series with other submodules 610; in total, the phase module 210 has n submodules.
  • the last of the n submodules 610 is electrically connected to the second terminal 606 via a coupling inductance 612.
  • the current sensor 608 the current flowing through the phase module 210 is measured.
  • the first terminal 604 may play in ⁇ example with the positive direct voltage terminal 310 be connected (see Figure 3);
  • the second terminal 606 may be connected to the AC voltage terminal 302.
  • the first terminal 604 and the second terminal 606 may each be connected to one phase of the AC power supply network 7. Then, both the first terminal 604 and second terminal 606 represent Wech ⁇ selpressivesan say (see therawsbei ⁇ game of Figure 2).
  • FIG. 7 shows an embodiment of the submodule 610 in detail.
  • the two-pole submodule 610 has a first submodule connection 704 and a second submodule connection 706.
  • the two submodule terminals 704 and 706 are connected to a power semiconductor circuit 710
  • a DC voltage connection of the power semiconductor circuit 710 is connected via a DC voltage intermediate circuit 714 to a first DC voltage connection of the DC-DC converter 720.
  • the DC clamping voltage ⁇ intermediate circuit 714 also provides the electrical Ener ⁇ strategy for the auxiliary power supply to the Energy Eateinhei ⁇ th 1410 (see FIG. 14).
  • a second DC ⁇ terminal of the DC-DC converter 720 is connected to an energy store 724th
  • the power semiconductor circuit 710 may also be referred to as a "power module.” Embodiments of the power semiconductor circuit 710 are shown in Figures 8 and 9, and embodiments of the DC-DC converter 720 are shown in Figures 10 and 11.
  • the power semiconductor circuit 710 has four power semiconductor switches 810.
  • the power semiconductor switches 810 are switched on and off power semiconductor switches.
  • Each of the power semiconductor switches 810 includes a power semiconductor device an antiparallel connected diode.
  • the power semiconductor device is an IGBT (Insulated Gate Bipolar Transistor).
  • the semiconductor device may be otherwise configured, for example, as an IGCT (Integrated Gate-Commutated Thyristor), IEGT (Injection-Enhanced Gate Transistor), or as a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) ).
  • the four semiconductor switches 810 form in the embodiment of Figure 8 is a full bridge circuit. As a result, the polarity of the voltage applied between the first submodule connection 704 and the second submodule connection 706 can be reversed.
  • FIG. 9 shows a further exemplary embodiment of a power semiconductor circuit 710 ⁇ , which has only two power semiconductor switches 810.
  • the two power semiconductor switches 810 form in the embodiment of Figure 9 is a half-bridge circuit. As a result, only one voltage of one polarity (or one zero voltage) can be output between the first submodule connection 704 and the second submodule connection 706.
  • FIG. 10 shows an embodiment of the DC-DC converter 720.
  • This DC-DC converter 720 has a capacitor 1010, which buffers the voltage in the DC intermediate circuit 714 (intermediate circuit voltage). Furthermore, the DC-DC converter 720 has four power semiconductor switches 810, which form a full-bridge circuit. The power ⁇ semiconductor switch 810 are connected to two output side connected together chokes 1015th
  • FIG. 11 shows a further exemplary embodiment of a DC-DC converter 720 ⁇ .
  • This DC-DC converter 720 ⁇ has, in contrast to the DC-DC converter 720 to only two power semiconductor switches in the form of a half bridge and an inductor 1015, which ⁇ is connected to the energy storage device-side terminal of the DC-DC converter 720th
  • Figure 12 shows an embodiment of the energy storage 724.
  • the energy storage 724 has a plurality of energy storage assemblies 1210, which are connected in series in the embodiment.
  • energy storage modules 1210 connected in parallel may also be arranged in the energy store 724, or series connections and parallel connections of energy storage modules 1210 may be arranged in the energy store 724.
  • the energy storage modules 1210 are constructed identically (in particular electrically and mechanically).
  • the Ener ⁇ gie Ardbauitati 1210 are interchangeable, that is, the lower energy storage module 1210 shown in Figure 12 could be replaced with the upper Darge ⁇ presented in Figure 12.
  • Energy storage assembly 1210th The energy storage assemblies 1210 may also be referred to as transport units because they can be individually transported and easily installed.
  • FIG. 13 an exemplary embodiment of the submodule 610 is shown in a three-dimensional representation.
  • a support frame 1310 four energy storage assemblies 1210, a power semiconductor circuit 710 and a DC-DC converter 720 are mounted.
  • the support frame 1310 is by means of
  • FIG. 14 shows an exemplary embodiment of the energy storage module 1210.
  • the energy storage module 1210 has four energy storage units 1410 and a control unit 1412.
  • the control unit 1412, the auxiliary ⁇ energy supply for the four energy storage units 1410 ready and performs the communication by using the four energy storage units ⁇ 1410th
  • the four energy storage units 1410 each have a control module 1420 and a plurality of energy stores 1422.
  • the control unit 1412 is above each because an internal power supply interface 1430 is electrically connected to the four energy storage units 1410.
  • the control unit 1412 powered via these Ener ⁇ gietrayss abolishstelle 1430, the energy storage devices 1410 with electric power (power supply).
  • Power supply is the electrical energy that is not required for the Aufla ⁇ tion of the energy storage 1422, but ⁇ example, for the control module 1420 of Energy Drein ⁇ unit 1410th
  • a module-internal communication interface 1435 is arranged between the control unit 1412 and the energy storage units 1410.
  • the control unit 1412 communicates with the power storage units 1410th
  • the energy storage module 1210 also has four component-external communication interfaces 1440. These are communication interfaces that allow communication outside the energy storage assembly 1210.
  • the energy storage module 1210 is connected to the energy storage module following in the series connection and the energy storage module preceding in the series circuit. More specifically, the control unit 1412 of the Energy acknowledgedbau ⁇ group 1210 connected to the control unit of the subsequent in the series circuit of the energy storage module and to the control unit of the preceding in the series circuit energy storage assembly by means of the two communication interfaces ⁇ 1440th Of the four module-external communication interfaces 1440 of the energy storage module 1210, two communication interfaces are redundant, that is, they serve as reserve communication interfaces.
  • the control unit 1412 is connected to the energy storage units 1410 via the module-internal communication interface.
  • len 1435 galvanically coupled.
  • this module-internal communication interface 1435 is embodied in the form of electrically conductive lines, in particular as metallic lines.
  • Such a galvanic coupling communication interface can be produced easily and inexpensively.
  • the control ⁇ 1412 is electrically decoupled from the control unit 1412 of another energy storage assembly by means of the module external communication interface 1440th
  • the module external communication interface is carried out at 1440 ⁇ example as one (or more) optical waveguide 1440th
  • such optical waveguides are more expensive than electrically conductive lines, they enable a potential separation between the control units 1412 of different energy storage assemblies 1210.
  • the module-external communication interface 1440 is thus a galvanically isolated communication interface.
  • the module-external communication interface 1440 connects the control units of neighboring Energypeicherbau ⁇ groups for the purpose of communication.
  • a communication between the control unit of the energy storage module and the central control unit 15 can take place.
  • the Energy storage module may also have a different number of energy storage units, for example two energy storage units or eight energy storage units.
  • the energy storage assembly 1210 is outwardly a self-contained electrical, mechanical and / or logi cal ⁇ entity. This is achieved in particular by the Steuerein ⁇ integrated 1412th
  • the control unit 1412 takes the Kom ⁇ munication with all the energy storage devices 1410, the energy Gie Jeffbauage 1210 and collects so information from all energy storage units 1410. This information can, for example, the state of charge of Energy Eateinhei ⁇ th or concern the energy storage units occurring errors.
  • the control unit 1412 sends this information on to the control unit of the adjacent energy storage module 1210. Alternatively, the control unit 1412 can also send this information to the control unit 15.
  • the control unit 1412 is further an energy distributor for the
  • FIG. 15 shows an exemplary embodiment of the control unit
  • the control unit 1412 has a logic ⁇ building block 1510, two auxiliary power supply units 1520 and 1520 ⁇ for the auxiliary power supply of energy storage units 1410, a measurement input 1530, the module-external communication interfaces 1440, the internal communication interfaces 1435 and the power supply interfaces 1430 (auxiliary supply manifold 1430) on.
  • the measuring input 1530 serves to monitor the energy storage units 1410.
  • the logic module 1510 may, for example, an FPGA (Field Programmable Gate Array), a CPLD (Complex Programmable Lo ⁇ gic Device), a digital signal processor DSP or a
  • This logic module 30 carries the
  • FIG. 16 shows an exemplary embodiment of the energy store 724 of the submodule 610.
  • the energy store 724 has a plurality of energy storage assemblies 1210, of which three are shown in FIG. 16.
  • Each energy storage assembly 1210 includes a control unit 1412 and four Ener ⁇ gie Profiseren 1410.
  • the control units 1412 of the energy storage modules 1210 are electrically connected in series by means of the module-external communication interfaces 1440.
  • the energy storage module 1210 described has beneficial ⁇ manner a high degree of modularity and flexibility in the design on, allowing easy adaptability to future applica- tions.
  • the total cost of communication is reduced while increasing reliability and availability during operation. This is achieved in particular ⁇ sondere fact that the module-internal commu ⁇ terfaces need not be galvanically isolated, but that for this module-internal communication interfaces inexpensive electrically conductive connections can be used.
  • the energy storage assembly 1210 may be factory fabricated and tested at a high pre-fabricated depth. This simplifies the construction of a Mehrhavenumrichters when Kun ⁇ is the much easier. The energy storage module is also easy to maintain and enables robust Messda ⁇ th processing.
  • the energy storage units 1410 are designed in the embodiment as a low-voltage energy storage 1410.
  • Low-voltage energy storage devices are energy storage systems that are operated with low voltage, ie in particular with voltages of less than or equal to 1500 V.
  • Low-voltage energy storage devices are available on the market as such.
  • Low-voltage energy storage devices can have a plurality of storage cells (for example in the form of capacitors such as, for example, ultra-caps) and an integrated voltage measurement.
  • the low-voltage energy storage described also performs monitoring functions: the control module 1420 performs monitoring functions and includes its own Control electronics, which takes a balance of the energy contained in the individual cells of the energy storage 1422 before ⁇ . If a defect occurs in a Niederschreibsenergiespei ⁇ cher, then the occurrence of an arc fault must be prevented because it can cause heat, fire, gas development ⁇ ment and / or smoke it, then follow insulation fault. As a result, in extreme cases, the modular multistage converter can be quickly destroyed.
  • critical parameters of the low voltage energy storage eg, temperature, currents, voltages
  • This monitoring is performed, the control unit 1412, the energy storage assembly 1210.
  • This advantageous ⁇ manner it is avoided that the energy storage (i.e. between each energy storage unit), and a central monitoring instance an own communication interface needs to be established between each low voltage, which galvanically insulated / electrically isolated would have to be.
  • Such galvanically isolated / galvanically isolated communication interfaces eg by means of more expensive
  • Optical fiber connections are only necessary between the control unit 1412 and the control units of adjacent energy storage modules. This results in a significant cost savings.
  • the data exchange with the energy storage units is thus carried out according to the invention exclusively via the control unit 1412.
  • the auxiliary power supply can also be realized by means of cost-effective galvanically conductive connections; Again, no galvanically isolated power supply interface is needed.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention concerne un sous-module (610) pour un convertisseur modulaire (3) à plusieurs étages, qui comporte un circuit semi-conducteur de puissance (710) pourvu d'au moins deux commutateurs (810) de semi-conducteur de puissance pouvant être fermés et ouverts, et un accumulateur d'énergie (724). L'accumulateur d'énergie (724) comporte une pluralité de blocs accumulateurs d'énergie (1210) qui présentent la même structure.
PCT/EP2016/064287 2015-07-10 2016-06-21 Sous-module pour un convertisseur modulaire à plusieurs étages WO2017009010A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16733366.5A EP3295551A1 (fr) 2015-07-10 2016-06-21 Sous-module pour un convertisseur modulaire à plusieurs étages

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015212931.4A DE102015212931A1 (de) 2015-07-10 2015-07-10 Submodul eines modularen Mehrstufenumrichters
DE102015212931.4 2015-07-10

Publications (1)

Publication Number Publication Date
WO2017009010A1 true WO2017009010A1 (fr) 2017-01-19

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EP (1) EP3295551A1 (fr)
DE (1) DE102015212931A1 (fr)
WO (1) WO2017009010A1 (fr)

Citations (4)

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