Patent ID: 11898540
Assignee: WOBBEN PROPERTIES GMBH
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  H  Y | IPC F

Claim 12:
13. A wind energy system comprising:
at least one wind power installation,
wherein the wind energy system is a converter-controlled infeed apparatus and feeds electrical power into an electrical supply network using at least one converter,
wherein the converter-controlled infeed apparatus feeds into a local network section of the electrical supply network at a network connection point, and the electrical supply network includes:
a plurality of infeed apparatuses including the converter-controlled infeed apparatus and other infeed apparatuses, for feeding infeed power including the electrical power of the converter-controlled infeed apparatus, and
a plurality of consumers for consuming a consumption power,

wherein the local network section has a converter pervasion of at least 50%, wherein the converter pervasion is a ratio of a rated power of converter-controlled infeed apparatuses of the plurality of infeed apparatuses to a total rated power of the plurality of infeed apparatuses,
wherein the converter-controlled infeed apparatus includes a controller configured to control the electrical power of the converter-controlled infeed apparatus depending on a network state of the electrical supply network,
wherein the controller has a controller behavior that is selected or set depending on a network characteristic of the local network section, and the network characteristic is dependent on:
at least one property of the local network section and at least one property of another network section, of the electrical supply network, coupled to the local network section, or
the at least one property of the local network section and a determination that another network section is not coupled to the electrical supply network,

wherein the network characteristic of the local network section is an island network in response to:
the local network section corresponding to the electrical supply network,
the electrical supply network forming a self-contained network, and
a sum of consumption powers of the plurality of consumers coupled to the electrical supply network does not exceed 5 gigawatt (GW),

wherein the network characteristic of the local network section is a section with high converter pervasion coupled to a strong network in response to:
the local network section being coupled to a superordinate network section relative to the local network section,
the sum of the consumption powers of the plurality of consumers coupled to the electrical supply network exceeding 5 GW,
the superordinate network section being part of the electrical supply network, and
the superordinate network section has a high centrifugal mass index of at least 50%, and/or a power exchange capacity with respect to the local network section, wherein the centrifugal mass index is a ratio between electrical power able to be fed into the superordinate network section by directly coupled synchronous generators to a total power able to be fed into the superordinate network section,

wherein the network characteristic of the local network section is a section with locally high converter pervasion coupled to a normal network in response to:
converter-controlled infeed apparatuses of the local network section being coupled to the local network section with an average short circuit ratio having a value of a maximum of 4,
the local network section being coupled to the superordinate network section,
the sum of the consumption powers of the plurality of consumers coupled to the electrical supply network exceeding 5 GW,
the superordinate network section being part of the electrical supply network, and
the superordinate network section having a centrifugal mass index between 20% and 100%,

wherein the network characteristic of the local network section is a section with high converter pervasion coupled to a network with high converter pervasion in response to:
the local network section being coupled to the superordinate network section,
the sum of the consumption powers of the plurality of consumers coupled to the electrical supply network exceeding 5 GW,
the superordinate network section being part of the electrical supply network, and
the superordinate network section having a low centrifugal mass index, and

wherein the network characteristic of the local network section is a section with indefinite behaviors in response to the network characteristic not being the island network, the section with the high converter pervasion coupled to the strong network, the section with the locally high converter pervasion coupled to the normal network or the section with the high converter pervasion coupled to the network with the high converter pervasion.