The Denmark defender admits a lack of football at OL convinced him to depart for the Eagles.
"I wanted to play every game but he [then Lyon manager Rudi Garcia] changed a lot which I was unhappy with but that is football sometimes," Andersen explained.
"Sometimes we have different ideas and I was really enjoying my time there, it is a fantastic club so I have nothing bad to say about them and it brought me here so I am happy.
"I like to see a project be presented for me and to hopefully play a big role in that building up.
"I'm 25 years of age. I need to play football. I need to learn, improve so that's the only way you improve by playing football and use my strengths as well and that I could see here. I am here to take Palace to a good place hopefully."
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