The　frequency　stability　of　power　systems　under　large　disturbances　has　been　severely　hampered　by　the　low　inertia　issue　caused　by　the　high　proportion　of　renewable　energy　systems,　resulting　in　frequency-related　indicators　closer　to　the　boundary　of　the　safety　domain.　This　paper　proposes　a　minimum　inertia　requirement　evaluation　approach　for　renewable　energy　power　systems　considering　frequency　stability　constraints　and　spatial　distribution　characteristics.　Firstly,　a　mathematical　model　of　system　frequency　dynamic　response　is　established,　and　the　inertia　center　frequency　is　introduced　to　represent　the　frequency　of　the　whole　system　(or　regional　system)　to　solve　the　problem　of　inconsistent　frequency　response　process　of　different　nodes.　Then,　an　evaluation　method　is　proposed　to　estimate　the　minimum　inertia　requirement　of　the　system　taking　into　account　the　frequency　stability　constraints,　which　avoids　the　issues　of　complex　model　construction　and　poor　solving　efficiency.　This　method　combines　the　time-domain　formulation　of　the　inertia　center　frequency　and　the　time-domain　formulation　of　power　systems　frequency　response　with　the　primary　frequency　modulation　dead　zone.　Finally,　this　paper　verifies　the　validity　of　this　method　in　a　certain　regional　power　grid　and　provides　theoretical　support　for　ensuring　stable　system　operation　and　operating　mode　arrangement.　©　2023　IEEE.