A wind park, a method of correcting voltage imbalances, and a wind turbine are provided. The wind park includes at least one wind turbine; a transformer coupled between the at least one wind turbine and a power grid. The transformer includes a primary winding arrangement coupled to the power grid, and a secondary winding arrangement coupled to the at least one wind turbine. The power grid includes at least three power lines, each power line conducting a respective phase of a multi-phase current. Each power line of the power grid is coupled to the primary winding arrangement via an individual tap changer. Influences of the detected voltage imbalances on the wind turbines can be compensated.

Claims

20 · 3 independent · depth 4

20 granted claims

›1.independentA wind park, comprising:nat least one wind turbine;a transformer coupled between the at least one wind turbine and a power grid, wherein the transform…+11

›2.↳ 1The wind park of claim 1,nwherein the primary winding arrangement comprises at least three windings.d2+1

›4.↳ 1The wind park of claim 1,nwherein each tap changer comprises a plurality of contact points or a continuous contact line being connected to the primary…d2+2

›7.↳ 1The wind park of claim 1,nwherein the tap changer is one or more of a group consisting of a mechanical tap changer, an electrical tap changer, and an …d2

›8.↳ 1The wind park of claim 1, further comprising:na detection unit coupled to the power grid, the detection unit being configured to detect voltage imbala…d2+2

›11.↳ 1The wind park of claim 1,nwherein the transformer serves as a centralized transformer for a plurality of wind turbines.d2

›12.↳ 1The wind park of claim 1,nwherein the transformer is implemented within the at least one wind turbine.d2

›13.independentA method of correcting voltage imbalances occurring on a power grid being coupled to a wind park via a transformer, the power grid comprising at least…+6

›14.↳ 13The method of claim 13,nwherein a first set of tap changers is adjusted based on one calculated tap changer adjustment and a second set of tap changer…d2

›15.↳ 13The method of claim 13,nwherein the detection of the voltage imbalances comprises:nmeasuring phase voltages at a point between the transformer and the…d2

›16.↳ 13The method of claim 13,nwherein the adjusting of the at least one tap changer comprises changing or adjusting electrical connections between the power…d2+3

›20.independentA wind turbine, comprising:na transformer coupled between the wind turbine and a power grid, wherein the transformer comprises a primary winding arran…

Classifications

4 codes

IPC · International Patent Classification

Section F — Mechanical engineering; lighting; heating; weapons

F03D9/00

Section H — Electricity

H02P9/04

USPC · US Patent Classification

290/44322/37

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Pendency

2.1 y

767 days filing → grant

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after a restriction

Responses

3 RCE

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Examiner

Julio C. Gonzalez

art unit 2839 · TC 2800

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Citations: 29 back · 0 forward

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Priority chain

2 priority documents

Priority

17 Apr 2009

earliest claimed

›Priority documents — 2

Type	Document	Date
provisional	US 61170168	17 Apr 2009
related publication	US 20100264666 A1	21 Oct 2010

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