Coordinated Control of Fuel Cell Hybrid Power System for Trams Based on DP Optimization

Lei XU; Qing TIAN; Yankun LI

doi:10.13890/j.issn.1000-128x.2021.06.010

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Coordinated Control of Fuel Cell Hybrid Power System for Trams Based on DP Optimization

Electric Traction and Control | 更新时间：2022-01-18

- Coordinated Control of Fuel Cell Hybrid Power System for Trams Based on DP Optimization
- Electric Drive for Locomotives Vol. 0, Issue 6, Pages: 73-80(2021)
- 作者机构：
  
  1.中车青岛四方机车车辆股份有限公司，山东　青岛　266111
- 作者简介：
- 基金信息：
- DOI：10.13890/j.issn.1000-128x.2021.06.010
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Lei XU, Qing TIAN, Yankun LI. Coordinated Control of Fuel Cell Hybrid Power System for Trams Based on DP Optimization. [J]. Electric Drive for Locomotives 0(6):73-80(2021)
DOI：

Lei XU, Qing TIAN, Yankun LI. Coordinated Control of Fuel Cell Hybrid Power System for Trams Based on DP Optimization. [J]. Electric Drive for Locomotives 0(6):73-80(2021) DOI： 10.13890/j.issn.1000-128x.2021.06.010.

摘要

为了降低有轨电车用燃料电池/锂电池混合电源系统的氢气消耗、改善燃料电池功率变化速率以及避免锂电池荷电状态（state of charge，SOC）出现积累式缺电或供电过剩，文章提出了一种基于动态规划（Dynamic Programming，DP）优化的有轨电车用燃料电池混合电源系统协调控制策略。基于燃料电池混合电源系统模型，建立燃料电池混合电源系统氢气消耗量与燃料电池功率变化率的目标函数，引入荷电状态惩罚函数以约束SOC始末值相等，通过DP全局优化寻找燃料电池与锂电池功率最佳分配序列，实现燃料电池混合电源系统协调控制。基于燃料电池混合电源仿真系统进行试验验证，结果表明：相较于有限状态机控制方法，燃料经济性提高了44.8%，燃料电池输出功率在20~60 kW的概率为64.16%，并且变化率明显改善，锂电池SOC始末值基本保持一致，验证了本文所提策略的有效性和优越性。

Abstract

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.

关键词

燃料电池混合电源系统协调控制DP优化有轨电车仿真城市轨道交通

Keywords

fuel cell hybrid power systemcoordinated controlDP optimizationtramsimulationurban rail transit

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