Assembly having a multilevel converter
AssigneeSiemens Energy Global GmbH & Co. KG
InventorMartin Pieschel
Life of this patent
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Abstract
An assembly has a multilevel converter for outputting reactive power to a power supply network. The multilevel converter contains three module branches arranged in a delta circuit. Each module branch contains a plurality of submodules in an electrical series circuit. Each module branch contains a first group of the submodules and a second group of the submodules. The submodules of the first group each contain a first electrical energy storage unit, a first electronic switching element and a second electronic switching element. The first electronic switching element and the second electronic switching element are arranged so that the first electrical energy storage unit is connected into the series circuit at a first polarity.
Claims17
An assembly, comprising:
- a multilevel converter outputting reactive power to a power supply network, said multilevel converter having three module branches disposed in a delta circuit, each of said module branches having a plurality of submodules in an electrical series circuit, each of said module branches having a first group of said submodules and a second group of said submodules, wherein:
- said submodules of said first group each contain a first electrical energy storage unit, a first electronic switching element and a second electronic switching element, wherein said first electronic switching element and said second electronic switching element are disposed so that said first electrical energy storage unit is connected into said electrical series circuit at a first polarity;
- said submodules of said second group each contain a second electrical energy storage unit, a third electronic switching element and a fourth electronic switching element, wherein said third electronic switching element and said fourth electronic switching element are disposed so that said second electrical energy storage unit can be connected into said electrical series circuit at a second polarity;
- and
- the first polarity and the second polarity are directed opposite to one another.
A method for outputting reactive power to a power supply network, which comprises the steps of:
- generating the reactive power via a multilevel converter, wherein the multilevel converter contains three module branches disposed in a delta circuit, each of the module branches contains a plurality of submodules in an electrical series circuit, each of the module branches contains a first group of the submodules and a second group of the submodules, wherein the submodules of the first group each contain a first electrical energy storage unit, a first electronic switching element and a second electronic switching element, wherein the first electronic switching element and the second electronic switching element are disposed so that the first electrical energy storage unit can be connected into the electrical series circuit at a first polarity, the submodules of the second group each contain a second electrical energy storage unit, a third electronic switching element and a fourth electronic switching element, wherein the third electronic switching element and the fourth electronic switching element are disposed so that the second electrical energy storage unit is connected into the electrical series circuit at a second polarity, and the first polarity and the second polarity are directed opposite to one another;
- and
- delivering the reactive power to the power supply network.
Dependencies are inferred from the claim text.