Energy management system for educational buildings using power line communications

• Main Authors: Bautista, Alexandra D., Pineda, Nicole Alexis G., Ong, Ericson T., Urbano, Maria Ysabel V., Uy, Pierre Stanley L.
• Format: text
• Language: English
• Published: Animo Repository 2014
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/11784
• Institution: De La Salle University

An Energy Management System (EMS) for educational institutions was implemented using power line communications as the medium. The class schedules of a particular building were logged in a PC with a Graphical User Interface (GUI). The EMS follows these schedules by switching appliances on or off in the corresponding classrooms. These appliances include an air conditioning unit, fluorescent lamps and electric fans. Commands from the PC are sent to a power line modem called a Base Node. The Base Node addresses these commands to similar power line modems called Service Nodes. The appropriate Service Nodes executes these commands and sends a reply, establishing bidirectional communications. The system achieved 100% reliability. The power line channel was characterized using the measured noise and attenuation in both the STRC and Velasco building. The modem was also characterized to see which modulation scheme available to the modem will be the most efficient based on these parameters: Bit Error Rate (BER), Packet Error Rate (PER), Signal-to-Noise Ratio (SNR), Received Signal Level (RSL), and Power Spectral Density (PSD). Since the RSL was well above the receiver sensitivity, the EMS showed an impressive reliability percentage of 100% and achieved savings of 26.79%