Investigation of the Current Harmonic Parameters of Wind Energy Converters

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Current harmonic parameters of six grid connected
+ J3 \9 `3 K  z+ i4 Pwind energy converters (WECs) with a power of 1.5 MW and
! q1 C2 Q# \, E0 d0 f8 X9 E1.8 MW were investigated. The evaluation was done according to
the basic guidelines for harmonic limits EN 61000-3-2 and IEC
& t; L8 Q2 Y* j' S' x1000-3-3. Focus was on the definition and explanation of a typical
8 S5 o5 `8 @( t- p0 G$ ~# ~% dshape of the standard parameters Total Harmonic Distortion
, Q, ~6 C7 \6 I(THD), Partial Weighted Harmonic Distortion (PWHD) and the
self-defined parameter Total Harmonic Distortion with
$ @$ I3 z4 C/ w. E6 g. j$ ?/ Fconsideration of interharmonics (THDz) over the relative power
/ j8 f# n/ M/ B4 j$ Y# Cof the WECs. Caused by the working principle of the power
electronic voltage-source-inverters (VSI) used, the harmonic
; w6 B2 r- j+ g, K& D* iparameters show a clearly definable pattern, depending on the
relative power of the WECs. The context between the power
* x3 U0 y8 Y1 }4 |4 zelectronic converter operation and the format of the power
# \. j& A. a2 L% s# p2 x$ v) m1 Qquality curves over the relative power is given.