Energy consumption analysis of FC-EDLC hybrid railway vehicle by dynamic programming

Abstract

In this study, we analyze energy consumption of FC-EDLC hybrid railway vehicle to reveal the energy reduction effect. To evaluate this effect properly, we adopt dynamic programming which is optimal control theory. Dynamic programming enables us to calculate energy consumption under optimized control of power sources. In this paper, we evaluate the relationship among reduction effect of energy consumption, device capacity, and line profiles. Finally, we reveal the energy consumption characteristics and the applicability of hybrid-power-source railway vehicle.

Fuel cell high-power applications

“…For the dc link A large research effort is underway to develop the FC for applications ranging from small portable electronic devices to automotive transport, as well as residential combined heat and power supplies. [34], [102], [103] 270-540 V for electric (FC) vehicles ■ [60], [65], [82] 350 V (transit bus systems) to 750 V ■ (tramway and locomotive systems) [7], [63], [64], [87], [89]- [92], [104]. Basically, low-voltage, high-current structures are needed because of the FC electrical characteristics.…”

“…Today, the required FC power is in the range of 1 kW to 2 MW: [64], [89]- [92] (for example four motors of 180-kW peak are installed on a tramway, two motors per boggy. The total power installed is 800 kW) 480 kW-2 MW for distributed gen-■ eration systems (grid parallel connection) [8], [93].…”

Modified 4-phase interleaved fuel cell converter for high-power high-voltage applications

“…• [32], [33]. This paper presents a modified 4-phase interleaved fuel cell converter for high power, high voltage conversion ratio, and transformer-less applications.…”

Power management strategy study for a multiple unit train

“…Dynamic programming as a global optimisation algorithm has been applied to find the optimum power distribution between the engines and energy storage devices in the hybrid electric vehicle driving systems [2], [3]. This paper, taking a threeengine-installed DMU train as a case study target, proposes that by using Floyd-Warshall's algorithm [4][5][6] , an example of dynamic programming, optimum power distribution between the three engines can be achieved.…”