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This paper / presentation is discussing the use of Synchronized Phasor Measurement Technology, which is now being used for monitoring power system status and dynamic transient event recording at Southern California Edison (SCE)off-line and in Real-time. This real time monitoring system is expected to enhance the Transmission system reliability and provide wide area visibility of the WECC system. The SPMS can enable SCE to monitor AC-DC power transmission system reliability and improve reliability by monitoring the phase angles and oscillations at several substations and two remote DC terminals. The system could be used for real-time control in future. SCE has been working aggressively on this Synchronized Phasor Measurement technology for over last twelve years and has installed a network of Phasor Measurement Units (PMUs), obtains data from eighteen Phasor Measurement Units (PMUs) and has installed two Phasor Data Concentrators (PDC) on its system. The data from the PMUs/PDCs is now being collected and being used for monitoring and analysis of the system events.