SIZING OF ISOLATED HYBRID RENEWABLE POWER SYSTEM WITH DEMAND SIDE MANAGEMENT

Isolated hybrid power systems (Photo-Voltaic (PV) battery, PV-Diesel-battery, PV-Wind-diesel) provide an economical viable solution for end-use electrification of remote and rural area loads. For a given load profile, hybrid system design focuses on sizing the supply side components for desired reliability. The effect of demand side options on the end- use load profiles and its impact on hybrid power system sizing have not been investigated in literature. In this paper a methodology for sizing isolated hybrid systems considering demand side management (DSM) options with supply side alternatives is proposed and applied to a typical isolated village. End use electrification case study of a typical village using PV-battery with available demand side options is illustrated. Synthetic load profile based on typical village electricity end users (Residential, Agriculture and Street lighting), solar radiation on surface tilted at angle of latitude of location and different days of battery autonomy are considered as input to simulation algorithm developed in MATLAB ® . An available DSM option of energy efficiency is utilized simultaneously with the supply side options for sizing the system. An acceptable feasible sizing solution in terms of ratings of hybrid system is achieved for cases of with and without DSM. Results show that the introduction of DSM reduces the daily consumption by 24% (20kWh) and peak by 21% (1.9kW) for a typical summer day. Daily consumption and peak of a typical winter day reduces by 18% (26 kWh) and 13% (1.1kW) respectively for DSM introduced. Reduced size of PV and battery by 28% and 24% respectively, are obtained for a desired reliability of 1% for 1.5 days of autonomy compared to without DSM case. Results indicate that the integration of DSM option can be considered as worthwhile option for sizing hybrid renewable power system