Research on Power Sharing Results Parameterization of Hybrid Energy Storage System
Ding Ruoxing, Dong Ge, Wu Heping, Xiao Xi
1. China Ship Development and Design Center Wuhan 430064 China; 2. State Key Lab of Power Systems Department of Electrical Engineering Tsinghua University Beijing 100084 China; 3. School of Aerospace Tsinghua University Beijing 100084 China; 4. Xiji Group Corporation Xuchang 461000 China
Abstract For the hybrid energy storage system (HESS) power sharing strategy based on the state of charge (SOC), the definition of equivalent time constant is proposed for its similarity to the time constant of low-pass filter. Attempting to make a general evaluation for different sharing strategies, the time constant is used as an indicator of power sharing results in this paper. Simulation results are presented to verify this indicator and its influencing factors. For two power sharing strategies of HESS, based on SOC or filtering, the advantage of the former is explained by comparing value ranges of the equivalent time constant and the time constant of the filter.
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2016, Vol. 31 
