하이브리드 에너지 저장장치를 탑재한 무가선 트램의 전력분배전략

초록

A wireless tram which runs without catenary and instead uses batteries installed in the tram has beenrecently researched actively. This paper presents a new method maximizing absorption of regenerative energy of awireless tram and extending life cycle of the energy storage device in the wireless tram by applying line-optimizedcharging and discharging scenario. Energy efficiency and life cycle of energy storage system (ESS) are highly dependenton the characteristic of operating conditions. For example, frequent charge and discharge with high power cause theproblems that decrease the battery life cycles. Hybrid energy storage system (HESS) is combination of two ESSs which have complementary characteristics to eachother. HESS can provide even better functionality and performance than the battery only ESS due to the synergy effectof two ESSs. This paper also provides a power distribution strategy and driving scenarios which increase the life cycleand energy efficiency of the HESS consisting of a battery and an ultra-capacitor. The developed strategy was tested andverified by a hardware-in-the-loop-simulation (HILS) system which emulates the a wireless tram.

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