Abstract
This paper presents a method for reliability evaluation of a hybrid generation system of wind and tidal powers with battery energy storage. Such a system may widely exist in coastal areas and islands in the future. A chronological multiple state probability model of tidal power generation system (TPGS) considering both forced outage rate (FOR) of the TPGS and random nature of tidal current speed is developed. In the evaluation of FORs of TPGS and WPGS (wind power generation system), the delivered power related failure rates of power electronic converters for TPGS and WPGS are considered. A chronological power output model of battery energy storage system (BESS) is derived. A hybrid system of tidal and wind generation powers with a BESS is used to demonstrate the effectiveness of the presented method. In case studies, the effects of various parameters on the system reliability are investigated.
Highlights
In the past decades, renewable energy becomes everincreasingly important in generation system planning
It was assumed that the studied power system is a remote local area and consists of a tidal power generation system (TPGS), a wind power generation system (WPGS) and a battery energy storage system (BESS) with an aggregated annual load curve
Both the TPGS and WPGS are based on a doubly-fed induction generator (DFIG) configuration, in which the stator windings are directly connected to a power grid through a transformer and the rotor windings are connected to the grid via a bidirectional BTB converter and a transformer
Summary
Renewable energy becomes everincreasingly important in generation system planning. In order to satisfy the continuous load demand in remote locations, a hybrid energy system with mixed tidal power, wind power and battery storage is an essential option. Such a system may widely exist in coastal areas and islands across the world in the future. Very little or no work has been done on the reliability evaluation of power system with both tidal and wind power generations as well as battery energy storage. A reliability model of the power electronic converter, which considers operating temperature impacts on the failure rates of electronic components, is incorporated into the reliability analysis of power system with TPGS and wind power generation system (WPGS) in this paper.
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