US 11,476,671 B2Granted

Wind power converting device

AssigneeDelta Electronics (Shanghai) Co., Ltd.

InventorsChangyong Wang, Yansong Lu

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Abstract

A wind power converting device includes a plurality of grid-side converters, a plurality of generator-side converters and a plurality of DC buses. The grid-side converters are connected with each other in series and electrically coupled to a power grid. The generator-side converters are connected with each other in series and electrically coupled to a generator device. The DC buses are electrically coupled between the grid-side converters and the generator-side converters. The DC buses include a positive DC bus, a negative DC bus and at least one intermediate DC bus between the positive DC bus and the negative DC bus. A cross section area of a conductor of the intermediate DC bus is smaller than 30% of a cross section area of a conductor of the positive DC bus or smaller than 30% of a cross section area of a conductor of the negative DC bus.

Claims21

Dependent claims

A wind power converting device, comprising:

one or a plurality of grid-side converters disposed in a lower part of a tower of a wind power generation system, wherein each the grid-side converter comprises a plurality of grid-side output ports electrically coupled to a power grid, a first DC input port and a second DC input port, wherein in every two adjacent grid-side converters of the plurality of grid-side converters, the second DC input port of one grid-side converter is connected with the first DC input port of the other grid-side converter in series;
one or a plurality of generator-side converters disposed in an upper part of the tower of the wind power generation system, wherein each the generator-side converter comprises a plurality of generator-side input ports electrically coupled to a generator device, a first DC output port and a second DC output port, wherein in every two adjacent generator-side converters of the plurality of generator-side converters, the second DC output port of one generator-side converter is connected with the first DC output port of the other generator-side converter in series;
and
a DC bus module comprising a plurality of DC buses electrically coupled between the plurality of grid-side converters and the plurality of generator-side converters,
wherein the plurality of DC buses comprises a positive DC bus, a negative DC bus and at least one intermediate DC bus between the positive DC bus and the negative DC bus, wherein a cross section area of a conductor of the at least one intermediate DC bus is smaller than 30% of a cross section area of a conductor of the positive DC bus or smaller than 30% of a cross section area of a conductor of the negative DC bus.

2 more elements

A wind power converting device, comprising:

a plurality of grid-side converters disposed in a lower part of a tower of a wind power generation system, wherein each of the plurality of grid-side converters comprises a plurality of grid-side output ports electrically coupled to a power grid, a first DC input port and a second DC input port, wherein in every two adjacent grid-side converters of the plurality of grid-side converters, the second DC input port of one grid-side converter is connected with the first DC input port of the other grid-side converter in series;
a plurality of generator-side converters disposed in an upper part of the tower of the wind power generation system, wherein each of the plurality of generator-side converters comprises a plurality of generator-side input ports electrically coupled to a generator device, a first DC output port and a second DC output port, wherein in every two adjacent generator-side converters of the plurality of generator-side converters, the second DC output port of one generator-side converter is connected with the first DC output port of the other generator-side converter in series;
and
a DC bus module comprising a plurality of DC buses electrically coupled between the plurality of grid-side converters and the plurality of generator-side converters;
and
at least one passive circuit protection component arranged in at least one power transmission path that is between the power grid and the generator device and established by the corresponding grid-side converter, the corresponding generator-side converter and the DC bus module, wherein electric energy is transferred through the power transmission path between the power grid and the generator device, wherein if a current flowing through the power transmission path corresponding to the passive circuit protection component exceeds a threshold current value of the passive circuit protection component, the passive circuit protection component is in an open state.

3 more elements

A wind power converting device, comprising:

a plurality of grid-side converters disposed in a lower part of a tower of a wind power generation system, wherein each of the plurality of grid-side converters comprises a plurality of grid-side output ports electrically coupled to a power grid, a first DC input port and a second DC input port, wherein in every two adjacent grid-side converters of the plurality of grid-side converters, the second DC input port of one grid-side converter is connected with the first DC input port of the other grid-side converter in series;
a plurality of generator-side converters disposed in an upper part of the tower of the wind power generation system, wherein each of the plurality of generator-side converters comprises a plurality of generator-side input ports electrically coupled to a generator device, a first DC output port and a second DC output port, wherein in every two adjacent generator-side converters of the plurality of generator-side converters, the second DC output port of one generator-side converter is connected with the first DC output port of the other generator-side converter in series;
and
a DC bus module comprising a plurality of DC buses electrically coupled between the plurality of grid-side converters and the plurality of generator-side converters;
at least one active circuit protection component arranged in at least one power transmission path that is between the power grid and the generator device and established by the corresponding grid-side converter, the corresponding generator-side converter and the DC bus module, wherein electric energy is transferred through the power transmission path between the power grid and the generator device,
at least one detection circuit arranged in the corresponding power transmission path, wherein if the detection circuit detects that the electric energy through the corresponding power transmission path is abnormal, the detection circuit issues an abnormal signal, wherein in response to the abnormal signal, the active circuit protection component in the corresponding power transmission path is switched to an open state.

3 more elements

A wind power converting device, comprising:

a plurality of grid-side converters disposed in a lower part of a tower of a wind power generation system, wherein each of the plurality of grid-side converters comprises a plurality of grid-side output ports electrically coupled to a power grid, a first DC input port and a second DC input port, wherein in every two adjacent grid-side converters of the plurality of grid-side converters, the second DC input port of one grid-side converter is connected with the first DC input port of the other grid-side converter in series;
a plurality of generator-side converters disposed in an upper part of the tower of the wind power generation system, wherein each of the plurality of generator-side converters comprises a plurality of generator-side input ports electrically coupled to a generator device, a first DC output port and a second DC output port, wherein in every two adjacent generator-side converters of the plurality of generator-side converters, the second DC output port of one generator-side converter is connected with the first DC output port of the other generator-side converter in series;
and
a DC bus module comprising a plurality of DC buses electrically coupled between the plurality of grid-side converters and the plurality of generator-side converters;
and
a plurality of generator-side control modules in communication with each other for controlling operations of the corresponding generator-side converters, wherein if the generator-side converter corresponding to a specified generator-side control module of the plurality of generator-side control modules and/or the grid-side converter electrically coupled to the generator-side converter satisfies a predetermined protecting condition of the specified generator-side control module, the specified generator-side control module stops issuing a three-phase voltage control signal, so that the corresponding generator-side converter is disabled.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/073,196Filed 16 Oct 2020
Priority: CN 201911008419.022 Oct 2019
Published: US 2021/0119449 A122 Apr 2021
Granted: 18 Oct 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification25 codes

H02J 3/08
Arrangements for connecting networks of the same frequency but supplied from different sources: synchronisation of networks
H02M 1/0074
Converter structures employing plural converter units, other than for parallel operation of the units on a single load: plural converter units…
F03D 7/0272
The wind motors having rotation axis substantially parallel to the air flow entering the rotor: by measures acting on the electrical generator
F03D 9/255
The apparatus being an electrical generator: connected to electrical distribution networks; Arrangements therefor