Microgrid is considered as an active cell for grid control and management in the modern power system environment. The load frequency control of multi-micro-grid consisting of two micro-grid connected through a tie-line is discussed in these paper. In order to achieve this, a mathematical model is proposed based on renewable energy resources with multi-load perturbations. The proposed microgrid-1 consists of Hydro, variable load, Solar Photo Voltaic (SPV), Bio Gas Turbine Generator (BGTG), Battery Energy Storage System (BESS) and while, the proposed microgrid-2 consist of Battery Energy Storage System (BESS), Solar Photo Voltaic (SPV), Hydro, Biodiesel Engine Generator (BDEG) and variable Load. During a disturbance in the system frequency the instant load sources is tackle by BESS, BDEG and BGTB. Fractional-Proportional-Integral-Derivative (FPID), Proportional-Integral-Derivative (PID) and Proportional-Integral (PI) where use to controls the load frequency of the proposed multi-micro-grid systems. The variable values (gain) of the controllers where considered as a control variable and integral square error (ISE) considered as being a fitness function of the optimization algorithm. The performance in relations of the dynamic response of the controllers are deliberate using different optimization techniques namely, Firefly algorithm (FA), Ant Lion Optimization (ALO) and Moth Flame Optimization (MFO) algorithm.