Investigation of the Current Harmonic Parameters of Wind Energy Converters

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Current harmonic parameters of six grid connected
wind energy converters (WECs) with a power of 1.5 MW and
1.8 MW were investigated. The evaluation was done according to
3 w) @/ I: x; I4 U3 r. athe basic guidelines for harmonic limits EN 61000-3-2 and IEC
$ X+ K0 Q( H5 w* p2 r* M/ `" v1000-3-3. Focus was on the definition and explanation of a typical
* M! W3 M6 P) \# W- }shape of the standard parameters Total Harmonic Distortion
* B% r9 k1 m2 @5 S# h0 F(THD), Partial Weighted Harmonic Distortion (PWHD) and the
' v2 _1 c4 K5 \+ w  ]self-defined parameter Total Harmonic Distortion with
consideration of interharmonics (THDz) over the relative power
of the WECs. Caused by the working principle of the power
electronic voltage-source-inverters (VSI) used, the harmonic
9 v4 r& O4 \$ k0 n1 E- Q7 {parameters show a clearly definable pattern, depending on the
: X) U: g3 h1 F- B* l1 }relative power of the WECs. The context between the power
+ Q/ L/ l- z7 ~- b: U  g0 qelectronic converter operation and the format of the power
* V2 l6 q5 v- g8 l! V) F- Jquality curves over the relative power is given.