Hybrid Energy Storage Capacity Configuration for Traction Power Supply Systems Considering Ladder-Type Carbon Trading Mechanism
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摘要:
在“双碳”背景下,为推动铁路行业的低碳转型,提出一种以牵引供电系统成本最小为优化目标的混合储能容量配置方法. 首先,考虑多源互补、新能源高效消纳等因素,构建含新能源发电系统、电-氢混合储能系统、牵引供电系统的综合能源系统框架,并给出碳交易市场的交易方案;其次,构建规划-运行模型,其中,规划层确定电-氢混合储能配置方案,运行层引入阶梯式碳交易机制,以计算牵引供电系统的日运行成本;最后,利用改进海鸥优化算法对模型进行求解,结合牵引供电系统与新能源实测数据,验证所提模型的有效性. 结果表明:与仅考虑阶梯式碳交易方案和仅考虑电-氢混合储能方案相比,系统总成本分别降低48%与36%,弃风弃光率则下降11%与3%;与仅考虑阶梯式碳交易搭配单一储能介质(蓄电池或氢储能)方案相比,系统总成本分别降低19%与40%,新能源消纳率则提升4%与6%.
Abstract:To promote the low-carbon transformation of the railway industry in the context of “carbon peaking and carbon neutrality” , a hybrid energy storage capacity configuration method was proposed, with an optimization objective of minimizing the total cost of the traction power supply system. Firstly, by considering factors such as multi-source complementarity and efficient consumption of new energy, a comprehensive energy system framework integrating new energy generation systems, electric–hydrogen hybrid energy storage systems, and traction power supply systems was constructed, and trading schemes for the carbon trading market were provided. Secondly, a planning–operation model was developed. The electric–hydrogen hybrid energy storage configuration scheme was determined at the planning level, and a ladder-type carbon trading mechanism was introduced at the operation level to calculate the daily operating cost of the traction power supply system. Finally, the improved seagull optimization algorithm was utilized to solve the model, and the actual data of the traction power supply system and new energy were combined to verify the effectiveness of the proposed model. The results show that compared with that of scenarios considering only ladder-type carbon trading schemes or electric–hydrogen hybrid energy storage schemes, the total system cost of the proposed method is reduced by 48% and 36%, respectively, while the renewable energy curtailment rate decreases by 11% and 3%, respectively. Compared with that of scenarios considering only ladder-type carbon trading combined with single energy storage media (battery or hydrogen energy storage), the total system cost is reduced by 19% and 40%, respectively, while the new energy consumption rate is improved by 4% and 6%, respectively.
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表 1 牵引所1各部分功率
Table 1. Power of components at traction substation 1
kW 时间 牵引负荷
总功率光伏发电
总功率风力发电
总功率蓄电池
总功率电解槽总
功率燃料电池
总功率弃风弃光
总功率外部电网
总功率再生制动
能量回收
总功率控制
策略8 :10—8 :30 31203 4137 11862 15204 0 0 0 0 0 E 9 :30—9 :35 − 8800 5203 4827 − 9000 − 3600 0 0 0 2570 D 12 :10—12 :20 − 2016 16804 10951 − 13500 − 5400 0 8855 0 0 C 12 :40—12 :45 16500 11541 7625 − 2666 0 0 0 0 0 A 13 :40—13 :45 7333 11232 7990 − 9000 − 2889 0 0 0 0 B 18 :15—18 :20 33697 936 7355 9000 0 2400 0 14006 0 G 18 :25 9460 371 3659 4500 0 930 0 0 0 F 表 2 不同牵引所运行结果对比
Table 2. Comparison of operation results of different traction substations
牵引
供电所系统总成本/万元 碳交易成本/万元 弃风弃光率/% 外部电网
出力占比/%1 10067 −363 6 6 2 8125 −525 4 2 表 3 不同牵引所储能配置结果对比
Table 3. Result comparison of different energy storage configurations for traction substations
kW 牵引
变电所蓄电池
功率电解槽
功率燃料电池
功率1 4500 1800 1200 2 6300 2400 960 表 4 不同方案结果对比
Table 4. Result comparison of different schemes
方案 总成本/
万元碳交易成
本/万元弃风弃光
率/%外部电网出力
占比/%蓄电池
功率/kW电解槽
功率/kW燃料电池
功率/kW1 19523 1321 17 32 0 0 0 2 12381 −165 10 25 6842 0 0 3 16548 −124 12 23 0 2854 3664 4 15698 0 9 16 3657 886 653 5 10067 −363 6 6 4500 1800 1200 -
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