Forestieri went down under a heavy challenge to win a penalty which he converted and was also involved in the second goal, which was finished off by Kieran Lee.
It was the Wednesday frontman's second goal in successive games after his opener last week at Fulham.
After a tough season so far, Forestieri appears to be closing in on the form which marked him out as one of the Championship's best players last season and Carvalhal is delighted.
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"I told Fernando that he is back again," he said. "He performed very well against Fulham in the last game and (against Wolves) he again did very well and it is the Fernando we know and recognise and that the coaches and fans like.
"He has a fantastic environment here to have another good season and we need him.
"We are better than last season and the big difference is the efficiency. We have found a way to score goals and the level of the football is very high. I hope we can keep this going for all of the season.
"Wolves ran and fought a lot during the 97 minutes we played. They had new energy because they had changed the coach and it was the first home game and that made them tougher to play against.
"But I think we were ready for this environment and we did well. We got the first goal and deserved it and we had more chances.
"In the second half we were very compact and solid and well organised and all the time tried to look for the third goal and posed a threat.
"The victory is well deserved and the big difference to other recent games is we got the second goal."