Studi Pengaruh Pembangkit Listrik Tenaga Surya 7,020 MWp dan Sistem Penyimpanan Energi Baterai Terhadap Kestabilan Sistem Hibrida di Salah Satu Pulau Nusa Tenggara Timur = Study of The Impact a 7,020 MWp Solar Power Plant and Battery Energy Storage System on the Stability of a Hybrid System in One of the Islands of East Nusa Tenggara