Multiplex remote information equipment [power system monitoring]

The Advanced Power Plant Integrated Maintenance Control System (ALICE) has been developed and deployed to perform remote monitoring and control of power equipment and air-conditioning equipment installed in NTT´s telecom buildings. At present, there is a need to expand the area that can be supervised by one such system and to improve system reliability and functionality to achieve more efficient operations. For this purpose, the authors have developed Multiplex Remote Information Equipment (MURE) that enhances the functions and improve the reliability of Remote Information Transmitting Equipment (RE) that has been conventionally used to collect and transmit information at remote offices. NTT has installed plural decentralized power systems in each of its buildings, and one unit of RE has been set up for each decentralized power system to transmit information to a monitoring center. One unit of MURE, on the other hand, multiplexes information from multiple REs inside a building and transmits the information to a monitoring center. MURE is not limited, however, to information transmit; it can also perform unified monitoring of all decentralized systems in a building and improve the efficiency of maintenance executions. This paper describes the system configuration and design concept of MURE