A hybrid-STATCOM in three-phase power system is proposed and talked about as a financially savvy reactive power compensator for medium voltage level application in this paper. Accordingly these predominant attributes can incredibly diminish system expenses. By utilizing five-level inverter is created and connected for infusing active power of RES into grid to diminish switching power loss, electromagnetic interference, and harmonic distortion precipitated by switching operation of power electronic devices. It’s V-I characteristics is then inspected, and contrasted with capacitive-coupled STATCOM (C-STATCOM) and conventional STATCOM. System configuration is then proposed hinged on consideration of reactive power compensation range and contraction of potential resonance issue. A control technique for hybrid-STATCOM is proposed to permit operation under various current and voltage conditions, i.e., voltage fault, unbalanced currents, and voltage sags. By utilizing simulation results we can check wide compensation range and good performance and low DClink voltage qualities of proposed hybrid-STATCOM.

Keywords : Capacitive-coupled static synchronous compensator (C-STATCOM), hybrid-STATCOM, low dc-link voltage, STATCOM, wide compensation range.