<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Dear All,<div class="">I’m trying to calculate the wind production of a wind farm. According to the data sheet of the wind turbine, I should use a 5th grades asymmetric sigmoidal function which is:</div><div class=""><br class=""></div><div class="">f(x)=d+(a-d)/(1+(x/c)^b)^m</div><div class=""><br class=""></div><div class="">d=2510.02</div><div class="">a=27.02</div><div class="">b=4.53</div><div class="">c=587.02</div><div class="">m=186038500</div><div class=""><br class=""></div><div class="">where x is the wind speed (3 m/s — 25 m/s).</div><div class=""><br class=""></div><div class="">When I run the code, the results are 27.02 which is equal to parameter “a”.</div><div class=""><br class=""></div><div class="">I cannot see any error during the script’s run. Does anyone has an idea or suggestion how I can fix it?</div><div class=""><br class=""></div><div class="">Thank you very much in advance.</div><div class=""><br class=""></div><div class="">Kind regards,</div><div class=""><br class=""></div><div class=""><br class=""><div class="">
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