This paper presents nonlinear optimal stabilizing controller using a Unified Power Quality Conditioner (UPQC) is proposed for weak/islanded grids. The stabilizing controller benefits for the micro-grid due to their relatively small energy levels stored and islanded medium size grid, which effect of stability as microgrids. To outline an ideal lattice stabilizer is utilized Hamilton–Jacobi–Isaacs ideal control technique. When presence of renewable energy for the power quality enhancement in the DS. The settling control is added to the UPQC arrangement, to stabilize a Grid Tie Inverter (GTI) or Synchronous Generator (SG) with medium effort of control. The proposed UPQC structure that only employs the series compensator, when GTI controlled related to renewable energy sources. Next, the approximate cost function is used neural networks with successive approximation method, in a two game player for the zero sum game with the players being UPQC control and microgrid influences. The simulation done by MATLAB/SIMULINK software is obtained.