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The massive pervasion of distributed generators in modern smart grids makes hierarchical voltage control paradigms unsuitable. Fuzzy logic and fuzzy agent based architecture is considered to be a promising research approach to address voltage control problem in smart grids. Following the said approach, this paper proposes decentralized and non-hierarchal voltage control architecture based on cooperative fuzzy agents. Similarly to self-organizing biological populations, the voltage control is achieved by the local interaction of fuzzy agents as that of the theory distributed consensus. This allows control agents to decide that when reactive power flow injection in the network is more useful in case of global network conditions. Simulation results obtained on the 30 bus IEEE test network are presented and discussed in order to prove the effectiveness of the proposed solution.