Water Supply Operation and Scheduling System with Electric Power Demand Response Function

A water supply operation and scheduling system with a power demand response (DR) function was proposed and evaluated in a case study. The system has two operation modes achieved by the DR function, that is, a power smoothing operation mode that seeks to smooth electric power use in ways that cut the basic tariff by cutting or shifting demand peaks and a DR operation mode that earns incentives by reducing demand in response to requests. The benefits of using the system for electric power management were assessed for a medium-sized water supply system. In an operation using both DR and smoothing operation modes at once, the scheduling system succeeded in reducing peak demand during the time period covered by DR requests (1 PM to 4 PM) by approximately 60%, from 1372 kW under existing practices to 545 kW. Moreover, peak daily demand was also reduced by approximately 16%, from 1772 kW to 1492 kW.