This paper proposes a new power sharing and frequency control method for a microgrid with various DGs to ensure the constant system frequency during islanded operation. For this, the proposed method adopts an additional integral controller with refined control gain. Firstly, the effects of various control parameters, such as integral gain and droop constant, on the power sharing and system frequency are examined. Then a method to determine the control parameters considering the dynamic characteristics of various DGs is proposed. Proposed method aims to restore the frequency to the nominal value within limited time and to ensure the proper power sharing between multiple DGs considering the rating and the dynamic characteristics of various energy sources.