考虑动态功率区间和制氢效率的电转氢(P2H)设备容量配置优化

doi:10.19595/j.cnki.1000-6753.tces.221317

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摘要

考虑大规模风电固有的间歇性、波动性影响,采用电转氢技术将弃风电量转化为可存储再利用的清洁氢能,助力碳达峰与碳中和战略发展。本文选用碱性电解槽作为电转氢设备,研究其制氢效率曲线,构建运行区间规划与经济性规划相结合的优化配置模型。首先分析电解槽平滑跟踪动态功率的区间范围,对设备充当电负荷的运行能力进行限制。然后在此基础上,以设备全生命周期成本与电氢市场交易成本整体最小为目标,对设备容量进行经济性优化。最后采用混沌粒子群优化算法求解模型。算例结果表明,在保障设备产氢质量同时,有效提升系统运行可靠性并降低投资成本和弃风率。研究成果实现电转氢设备作为灵活负载跟踪可再生能源的功率波动。

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关键词 ：电转氢, 动态功率区间, 制氢效率, 混沌粒子群优化算法, 容量配置

Abstract：

With the rapid development of wind power generation, the inherent characteristics of intermittent, fluctuating and randomness lead to high wind curtailment rates, power-to-hydrogen (P2H) equipment is used to convert excess wind power into clean hydrogen energy that can be stored and reused. However, traditional P2H equipment planning research ignores external power fluctuation, only analyzing its static characteristics. As an electrical load with a fixed energy conversion efficiency, P2H equipment is too ideal to operate within any range under the rated capacity. The load range is affected by the wind power fluctuation, exceeding this allowable range will influence the safety and service life of P2H equipment. Recently, the dynamic power range has been studied, but most of them have not given specific control strategies and unified models. To address these issues, this paper proposes a power range selection strategy, which can smoothly track the external power fluctuation by segmented response current and voltage.
Firstly, an alkaline electrolysis cell (AEC) is selected as the research object, the correlation between wind power and hydrogen production is fully studied by considering its hydrogen production efficiency characteristic. Then, based on realizing high-quality hydrogen production, an optimal configuration model combining operation range planning and economic planning is constructed. The range selection strategy ensures the operating ability of AEC to act as a load, realizing the stable operation of the whole system. In economic planning, the model comprehensively considers the whole life cycle cost, power purchase cost, hydrogen sales revenue and wind curtailment penalty cost as the objective function, and uses the chaotic particle swarm optimization (CPSO) algorithm to solve it. Finally, by comparing with the existing configuration models, the method proposed simultaneously achieves a lower wind curtailment rate and higher hydrogen production quality, thus leading to optimal economics.
By selecting historical annual wind speed data at 10min intervals, the two-parameter Weibull distribution function is applied to build typical scenarios. Simulation results show that, compared with traditional models, the proposed configuration model reduces the capacity by 22% and wind curtailment rate by 23%, which greatly improves the equipment investment cost. When the safety device detects that the hydrogen to oxygen (HTO) is higher than 2%, P2H equipment will shut down automatically, thereby reducing the explosion risk of mixing hydrogen and oxygen. Furthermore, the influence of hydrogen selling price on the capacity planning results is separately analyzed, the price of 7.2 EUR/kg is a key node in this example, which is directly related to the curtailed wind power.
The main conclusions are as follows: 1) Fluctuating wind power can be tracked by the proposed range selection strategy, which ensures the safety of mixed gas and overload problems. 2) By analyzing the hydrogen production efficiency curve of AEC, the equipment can operate near the maximum efficiency point, and the marginal cost of hydrogen production is reduced. 3) Compared with traditional models, the optimal configuration model proposed combines operating range planning and economic planning, which considers equipment safety, hydrogen production quality, and economy. This greatly increases the hydrogen production revenue, reduces the total planning cost, and can better adapt to the fluctuation of wind power. The CPSO algorithm can also converge to a better solution with fewer iterations compared with the PSO algorithm. 4) The hydrogen selling price will influence the capacity configuration results of P2H equipment. As the hydrogen price raises, the equipment capacity and hydrogen quality increase linearly. However, due to the limitation of curtailed wind power, after the price reaches 7.2 EUR/kg, there is no significant change in configuration results.

Key words： Power-to-hydrogen dynamic power range hydrogen production efficiency chaotic particle swarm optimization algorithm capacity configuration

收稿日期: 2022-07-04

PACS:	TM614
	TQ116.2

基金资助:

国家自然科学基金资助项目（52177184）

通讯作者: 赵晋斌男,1972年生,教授,博士生导师,研究方向为现代电力电子技术在电力系统中的应用、新能源发电技术等。E-mail：zhaojinbin@shiep.edu.cn

作者简介: 李军舟男,1998年生,硕士研究生,研究方向为分布式电源的控制与应用。E-mail：751916449@qq.com

引用本文:

李军舟, 赵晋斌, 陈逸文, 毛玲, 屈克庆. 考虑动态功率区间和制氢效率的电转氢(P2H)设备容量配置优化[J]. 电工技术学报, 0, (): 230614-230614. Li Junzhou, Zhao Jinbin, Chen Yiwen, Mao Ling, Qu Keqing. Optimal Capacity Configuration of P2H Equipment Considering Dynamic Power Range and Hydrogen Production Efficiency. Transactions of China Electrotechnical Society, 0, (): 230614-230614.

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