Recently, the importance of wide-area situational awareness (WASA) has increased, as it can form the basis for power system stabilisation systems or be part of a smart grid. The standardisation of communication interfaces, with the ability to integrate many kinds of subsystems, is becoming increasingly important in enabling the building of a standard WASA system. In Japan, wide-area monitoring, protection and control (WAMPAC) systems for power system stabilisation, which are a form of WASA system, have been applied for many years, and significant experience has been gained in the application of this technology. Tokyo Electric Power Company has conducted a review of their WAMPAC systems and international standards, and has identified the standards that are important to WASA systems. The speaker introduces a proposed system configuration for a WASA system based upon the international standards identified, and a WASA evaluation system which his company has developed.