Coordinated Control of Fuel Cell Hybrid Power System for Trams Based on DP Optimization
In order to reduce the hydrogen consumption of the fuel cell/lithium battery hybrid power system for trams, improve the rate of change of fuel cell power, and avoid the accumulation of lithium battery state of charge (SOC) power shortage or excess power supply, a coordinated control strategy of fuel...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Electric Drive for Locomotives
2021-11-01
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| Series: | 机车电传动 |
| Subjects: | |
| Online Access: | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128x.2021.06.010 |
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| Summary: | In order to reduce the hydrogen consumption of the fuel cell/lithium battery hybrid power system for trams, improve the rate of change of fuel cell power, and avoid the accumulation of lithium battery state of charge (SOC) power shortage or excess power supply, a coordinated control strategy of fuel cell hybrid power system for trams based on dynamic programming (DP)optimization was proposed. Based on the fuel cell hybrid power system model, the objective function of the hydrogen consumption of the fuel cell hybrid power system and the rate of change of the fuel cell power was established, and the state of charge (SOC) penalty function was introduced to constrain the SOC to be equal all the time. Through the DP global optimization, the optimal distribution sequence of fuel cell and lithium battery power was found to realize the coordinated control of the fuel cell hybrid power system.The simulation system based on fuel cell hybrid power supply system is veri fied by experiment, and the results show that: the fuel economy is improved by 44.8%, the probability of fuel cell output power in the range of 20-60 kW is 64.16%, and the change rate is signi ficantly improved; the starting and ending SOC values of lithium battery are basically consistent, which veri fies the effectiveness and superiority of the strategy proposed in this paper. |
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| ISSN: | 1000-128X |