My husbard was convicted of a felony and served time. Will he be deported if he applies to replace/renew his green card. Has been LPR 30 years.

Removal/deportation depends on a variety of factors.  Your husband should NOT apply to renew his I-551 (Green Card) without speaking with a lawyer first.  Your lawyer will need to review your husband's criminal record in detail before making a recommendation.  I would be glad to assist you further if you would like.