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In this paper,a supervisory computer network for Beo-Wide Power Grid system have been proposed and implemented,which includes a renewable power generation and advanced metering infrastructure.An Intct-based communication network running on multiprotocol label switching (MPLS) has been implemented for a smart power grid,with the addition of the renewable energy monitoring system.The centralized supervisory control and data acquisition systems (SCADA) are replaced by a wide area monitoring system(WAMS)comprising of a phasor measurement unit (PMU).The implemented communication network used advanced metering infrastructure that operates on worldwide interoperability for microwave access (WiMAX),wireless fidelity (Wi-Fi) and low power Wi-Fi,which are proposed for the distribution systems of Sarawak Energy.The proposed wide area network (WAN) is simulated using OPNET Modeler and the results are compared with the existing WAN used by Sarawak Energy.