LCL　filters　are　extensively　utilized　in　Grid-connected　inverters　due　to　their　exceptional　capability　in　suppressing　high-frequency　harmonics.　The　active　damping　method　is　commonly　employed　to　mitigate　the　resonance　peak　of　the　LCL　filter.　However,　this　control　strategy　induces　a　shift　in　the　natural　resonance　point.　To　address　this　issue,　a　novel　active　damping　control　strategy　based　on　the　principle　of　equivalent　transformation　is　proposed　in　this　paper,　which　not　only　effectively　suppresses　the　resonance　peak　but　also　avoids　deviation　from　the　natural　resonance　point.　Finally,　experiments　are　carried　out　on　a　three-phase　LCL　Grid-connected　inverter,　and　the　experimental　results　show　that　the　control　strategy　has　good　steady-state　performance,　dynamic　response,　and　robustness　under　both　rigid　and　ultra-weak　network　conditions.